SOUTHWEST GAS CORP
10-K, 1994-03-30
NATURAL GAS TRANSMISISON & DISTRIBUTION
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                                   FORM 10-K
 
(MARK ONE)
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
     ACT OF 1934 [FEE REQUIRED]
 
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1993
 
                                       OR
 
[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE
     SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
 
      FOR THE TRANSITION PERIOD FROM                  TO
 
                         COMMISSION FILE NUMBER 1-7850
 
                           SOUTHWEST GAS CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                               <C>
                 CALIFORNIA                                        88-0085720
       (STATE OR OTHER JURISDICTION OF                          (I.R.S. EMPLOYER
       INCORPORATION OR ORGANIZATION)                          IDENTIFICATION NO.)

          5241 SPRING MOUNTAIN ROAD
            POST OFFICE BOX 98510
              LAS VEGAS, NEVADA                                    89193-8510
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES                         (ZIP CODE)
</TABLE>
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (702) 876-7237
 
          SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
 
<TABLE>
<CAPTION>
                                                            NAME OF EACH EXCHANGE
           TITLE OF EACH CLASS                               ON WHICH REGISTERED
           -------------------                              ---------------------
<S>                                               <C>
        Common Stock, $1 par value                      New York Stock Exchange, Inc.
                                                         Pacific Stock Exchange, Inc.

                SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:
     9% DEBENTURES, SERIES A, DUE 2011              9 3/8% DEBENTURES, SERIES D, DUE 2017
     9% DEBENTURES, SERIES B, DUE 2011                10% DEBENTURES, SERIES E, DUE 2013
  8 3/4% DEBENTURES, SERIES C, DUE 2011             9 3/4% DEBENTURES, SERIES F, DUE 2002
</TABLE>
 
     Indicate by check mark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes  X   No
                                               ---     ---
     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  Yes  X   No
                ---     ---
    AGGREGATE MARKET VALUE OF THE VOTING STOCK HELD BY NONAFFILIATES OF THE
                                  REGISTRANT:
 
                         $360,103,421 at March 18, 1994
 
               THE NUMBER OF SHARES OUTSTANDING OF COMMON STOCK:
 
       Common Stock, $1 Par Value 21,027,937 shares as of March 18, 1994
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
<TABLE>
<CAPTION>
             DESCRIPTION                     PART INTO WHICH INCORPORATED
             -----------                     ----------------------------
<S>                                          <C>
Proxy Statement dated March 31, 1994             III
</TABLE>
 
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                               TABLE OF CONTENTS
 
                                     PART I
 
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                                                                                        PAGE
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<S>        <C>                                                                          <C>
ITEM  1.   BUSINESS...................................................................    1
           Natural Gas Operations.....................................................    1
             General Description......................................................    1
             Properties...............................................................    2
             Rates and Regulation.....................................................    3
             Competition..............................................................    4
             Demand for Natural Gas...................................................    4
             Natural Gas Supply.......................................................    5
             Environmental Matters....................................................    6
             Employees................................................................    6
           Financial Services Activities..............................................    7
             General Description......................................................    7
             Lending Activities.......................................................    7
             Asset Quality............................................................   11
             Real Estate Development Activities.......................................   14
             Investment Activities....................................................   14
             Deposit Activities.......................................................   16
             Borrowings...............................................................   17
             Employees................................................................   18
             Competition..............................................................   18
             Properties...............................................................   18
             Regulation...............................................................   18
           Holding Company Matters....................................................   25
ITEM  2.   PROPERTIES.................................................................   26
ITEM  3.   LEGAL PROCEEDINGS..........................................................   26
ITEM  4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS........................   26
                                          PART II
ITEM  5.   MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
           MATTERS....................................................................   26
ITEM  6.   SELECTED FINANCIAL DATA....................................................   27
           Consolidated Selected Financial Statistics.................................   27
           Segment Data...............................................................   28
             Natural Gas Operations...................................................   28
             Financial Services.......................................................   29
ITEM  7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
           OPERATIONS.................................................................   30
           Consolidated Capital Resources and Liquidity...............................   30
           Results of Consolidated Operations.........................................   31
           Recently Issued Accounting Pronouncements..................................   32
</TABLE>
 
                                        i
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<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>        <C>                                                                          <C>
           Natural Gas Operations Segment.............................................   32  
             Capital Resources and Liquidity..........................................   33
             Results of Natural Gas Operations........................................   34
             Rates and Regulatory Proceedings.........................................   36
             Take-or-Pay..............................................................   37
           Financial Services Segment.................................................   38
             Financial and Regulatory Capital.........................................   38
             Capital Resources and Liquidity..........................................   40
             Risk Management..........................................................   42
             Long-Term Strategic Business Plan........................................   50
             Results of Financial Services Operations.................................   51
ITEM  8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA................................   58
           Consolidated Statements of Financial Position..............................   58
           Consolidated Statements of Income..........................................   59
           Consolidated Statements of Cash Flows......................................   60
           Consolidated Statements of Stockholders' Equity............................   61
           Notes to Consolidated Financial Statements.................................   62
           Note  1 -- Summary of Significant Accounting Policies......................   62
           Note  2 -- Summarized Financial Statement Data.............................   66
           Note  3 -- Debt Securities.................................................   73
           Note  4 -- Loans Receivable................................................   75
           Note  5 -- Real Estate.....................................................   76
           Note  6 -- Allowances for Estimated Credit Losses..........................   78
           Note  7 -- Deposits........................................................   79
           Note  8 -- Cash Equivalents and Securities Sold Under Repurchase
                      Agreements......................................................   79
           Note  9 -- Commitments and Contingencies...................................   81
           Note 10 -- Short-term Debt.................................................   82
           Note 11 -- Long-term Debt..................................................   83
           Note 12 -- Preferred and Preference Stocks.................................   85
           Note 13 -- Employee Postretirement Benefits................................   86
           Note 14 -- Income Taxes....................................................   89
           Note 15 -- Segment Information.............................................   92
           Note 16 -- Quarterly Financial Data (Unaudited)............................   93
           Note 17 -- Subsequent Event -- Arizona Pipe Replacement Program
                      Disallowances...................................................   94
           Report of Independent Public Accountants...................................   97
ITEM  9.   DISAGREEMENTS ON ACCOUNTING AND FINANCIAL DISCLOSURE.......................   98
                                          PART III
ITEM 10.   DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.........................   98
ITEM 11.   EXECUTIVE COMPENSATION.....................................................   99
ITEM 12.   SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.............   99
ITEM 13.   CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.............................   99
</TABLE>
 
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<S>        <C>                                                                          <C>
ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 10-K...........  100
           List of Exhibits...........................................................  101
           Report of Independent Public Accountants on Schedules......................  104
           Schedule V    -- Property, Plant and Equipment.............................  105
           Schedule VI   -- Accumulated Depreciation and Amortization of Property,
                             Plant and Equipment......................................  106
           Schedule VIII -- Valuation and Qualifying Accounts.........................  107
           Schedule IX   -- Short-Term Borrowings.....................................  108
           Schedule X    -- Supplementary Income Statement Information................  109
SIGNATURES............................................................................  110
GLOSSARY OF TERMS.....................................................................  112
</TABLE>
 
                                       iii
<PAGE>   5
 
                                     PART I
 
ITEM 1. BUSINESS
 
     The registrant, Southwest Gas Corporation (the Company), is incorporated
under the laws of the State of California effective March 10, 1931, and is
comprised of two segments: natural gas operations and financial services. The
natural gas operations segment (gas segment) includes natural gas transmission
and distribution operations in Arizona, Nevada and California. The financial
services segment consists of PriMerit Bank (the Bank), a wholly owned
subsidiary, which operates principally in the thrift industry. See Selected
Financial Data for financial information related to each business segment.
 
     The executive offices of the Company are located at 5241 Spring Mountain
Road, P.O. Box 98510, Las Vegas, Nevada 89193-8510, telephone number (702)
876-7237.
 
                             NATURAL GAS OPERATIONS
 
GENERAL DESCRIPTION
 
     The Company is subject to regulation by the Arizona Corporation Commission
(ACC), the Public Service Commission of Nevada (PSCN) and the California Public
Utilities Commission (CPUC). These commissions regulate public utility rates,
practices, facilities and service territories in their respective states. The
service areas certificated to the Company by the respective regulatory
commissions having jurisdiction over it are exclusive. They remain exclusive
unless the Company defaults on its obligations to provide adequate service and
another utility can be found that is willing and able to supply the service. The
CPUC also regulates the issuance of all securities by the Company, with the
exception of short-term borrowings. Certain of the Company's accounting
practices, transmission facilities and rates are subject to regulation by the
Federal Energy Regulatory Commission (FERC).
 
     The Company purchases, transports and distributes natural gas to 932,000
residential, commercial and industrial customers in geographically diverse
portions of Arizona, Nevada and California. There were 35,000 customers added to
the system during 1993. The Company expects to add approximately 36,000
customers by the end of 1994. See Natural Gas Operations Segment -- Capital
Resources and Liquidity of Management's Discussion and Analysis (MD&A) for
discussion of capital requirements to meet this growth.
 
     The table below lists the Company's percentage of operating margin
(operating revenues less net cost of gas) by major customer class for the years
indicated:
 
<TABLE>
<CAPTION>
                                                                        LARGE             ELECTRIC
                                                                     COMMERCIAL,         GENERATION,
                     FOR THE                   RESIDENTIAL AND      INDUSTRIAL AND       RESALE AND
                   YEAR ENDED                 SMALL COMMERCIAL          OTHER          TRANSPORTATION
                   ----------                 -----------------     --------------     ---------------
    <S>                                       <C>                   <C>                <C>
    December 31, 1993.......................          79%                  7%                 14%
    December 31, 1992.......................          80                   8                  12
    December 31, 1991.......................          78                   9                  13
</TABLE>
 
     The volume of sales and transportation activity for electric utility
generating plants varies greatly according to demand for electricity and the
availability of alternative energy sources; however, it is not material in
relation to the Company's earnings. In addition, the Company is not dependent on
any one or a few customers to the extent that the loss of any one or several
would have a significant adverse impact on the Company.
 
     Transportation of customer-secured gas to end-users on the Company's system
continues to have a significant impact on the Company's throughput, accounting
for 46 percent of total system throughput in 1993. Although the volumes were
significant, these customers provide a much smaller proportionate share of the
Company's operating margin as indicated in the table above. In 1993, there were
96 customers throughout the Company's service territories who utilized this
service, transporting 725 million therms.
 
                                        1
<PAGE>   6
 
     The demand for natural gas is seasonal, and it is management's opinion that
comparisons of earnings for interim periods do not reliably reflect overall
trends and changes in the Company's operations. Also, earnings for interim
periods can be significantly affected by the timing of general rate relief.
 
PROPERTIES
 
     The plant investment of the Company consists primarily of transmission and
distribution mains, compressor stations, peak shaving/storage plants, service
lines, meters and regulators which comprise the pipeline systems and facilities
located in and around the communities it serves. The Company also includes other
properties such as land, buildings, furnishings, work equipment and vehicles in
plant investment. In addition, the Company leases several properties, including
a Liquefied Natural Gas (LNG) storage plant on its northern Nevada system and a
portion of the corporate headquarters office complex located in Las Vegas,
Nevada. See Note 9 of the Notes to Consolidated Financial Statements for
additional discussion regarding these leases. Total gas plant, exclusive of
leased property, at December 31, 1993, was $1.4 billion, including construction
work in progress. It is the opinion of management that the properties of the
Company are suitable and adequate for its purposes.
 
     Substantially all of the Company's gas mains and service lines are
constructed across property owned by others under right-of-way grants obtained
from the record owners thereof, on the streets and grounds of municipalities
under authority conferred by franchises or otherwise, or on public highways or
public lands under authority of various federal and state statutes. None of the
Company's numerous county and municipal franchises are exclusive, and some are
of limited duration. These franchises are renewed regularly as they expire, and
the Company anticipates no serious difficulties in obtaining future renewals.
 
     With respect to the right-of-way grants, the Company has had continuous and
uninterrupted possession and use of all such rights-of-way, and the associated
gas mains and service lines, commencing with the initial stages of the
construction of such facilities. Permits have been obtained from public
authorities in certain instances to cross, or to lay facilities along, roads and
highways. These permits typically are revocable at the election of the grantor,
and the Company occasionally must relocate its facilities when requested to do
so by the grantor. Permits have also been obtained from railroad companies to
cross over or under railroad lands or rights-of-way, which in some instances
require annual or other periodic payments and are revocable at the grantors'
elections.
 
     The Company operates two major pipeline transmission systems: (i) a system
owned by Paiute Pipeline Company (Paiute), a wholly owned subsidiary of the
Company, extending from the Idaho-Nevada border to the Reno, Sparks and Carson
City areas and communities in the Lake Tahoe area in both California and Nevada
and other communities in northern and western Nevada; and (ii) a system
extending from the Colorado River at the southern tip of Nevada to the Las Vegas
distribution area.
 
     The Company's northern Nevada and northern California properties are
referred to as the northern system. The Company serves various communities in
northern Nevada including Carson City, Elko, Fallon, Fernley, Lovelock,
Winnemucca and Yerington. The Company also provides service to the north Lake
Tahoe area. In addition, the Company also owns a Liquefied Petroleum Gas (LPG)
facility located near Reno, Nevada.
 
     The Arizona, southern Nevada and southern California properties of the
Company are referred to as the southern system. The Company's service areas in
Arizona include most of the central and southern areas of the state including
Phoenix, Tucson, Yuma and surrounding communities. Service is provided in
southern Nevada throughout the Las Vegas valley and Bullhead City. Communities
served by the Company in southern California include Barstow, Big Bear, Needles
and Victorville.
 
     The Company also owns a 35,000 acre site in northern Arizona which was
acquired for the purpose of constructing an underground natural gas storage
facility, known as the Pataya Gas Storage Project (Pataya), to serve its
southern system. Based upon current studies and the continued restructuring of
the natural gas industry, the Company believes that it will need an underground
natural gas storage facility, such as Pataya, in the future to meet the needs of
its customers on the southern system. In addition to the gas storage facility,
the
 
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<PAGE>   7
 
Company is considering other opportunities for other portions of the site, such
as the partial sale of its water rights. Other potential uses for the land
include sites for solar generating facilities, cogeneration facilities and
various other business ventures. Project costs of $11.1 million have been
capitalized through December 1993 and include land acquisition and related
development costs.
 
RATES AND REGULATION
 
     Rates that the Company is authorized to charge its distribution system
customers are determined by the ACC, CPUC and PSCN in general rate cases and are
derived using rate base, cost of service and cost of capital experienced in a
historical test year, as adjusted in Arizona and Nevada, and projected for a
future test year in California. The FERC regulates the northern Nevada
transmission and LNG storage facilities of Paiute and the rates it charges for
transportation of gas directly to certain end-users and to various local
distribution companies (LDCs). The LDCs transporting on Paiute's system are:
Sierra Pacific Power Company (Reno and Sparks, Nevada), Washington Water Power
Company (South Lake Tahoe, California) and Southwest Gas Corporation (North Lake
Tahoe, California and various locations throughout northern Nevada).
 
     Rates charged to customers vary according to customer class and are fixed
at levels allowing for the recovery of all prudently incurred costs, including a
return on rate base sufficient to pay interest on debt and a reasonable return
on equity. The Company's rate base consists generally of the original cost of
utility plant in service, plus certain other assets such as working capital and
inventories, less accumulated depreciation on utility plant in service, net
deferred income tax liabilities, and certain other deductions. The Company's
rate schedules in all of its service areas contain purchased gas adjustment
(PGA) clauses which permit the Company to adjust its rates as the cost of
purchased gas changes. Generally, the Company's tariffs provide for annual
adjustment dates for changes in purchased gas costs. However, the Company may
request to adjust its rates more often than once each year, if conditions
warrant. These changes have no significant impact on the Company's profit
margin.
 
     Except for California, the Company is allowed to make a general rate case
filing whenever management believes there is a need for additional rate relief.
Within California, general rate case filings are required every three years, and
attrition filings are made annually for the interim periods. The table below
lists the docketed rate filings initiated and/or completed within each
ratemaking area in 1993 and the first quarter of 1994:
 
<TABLE>
<CAPTION>
                                                                                      MONTH
                                                                                   FINAL RATES
          RATEMAKING AREA              TYPE OF FILING         MONTH FILED           EFFECTIVE
- -----------------------------------  -------------------    ----------------    -----------------
<S>                                  <C>                    <C>                 <C>
ARIZONA:
  Central..........................  General rate case      September 1992      September 1993
  Southern.........................  General rate case      October 1993               --
CALIFORNIA:
  Northern & Southern..............  Attrition              November 1993       January 1994
  Northern & Southern..............  General rate case      January 1994               --
NEVADA:
  Northern & Southern..............  General rate case      March 1993          November 1993(1)
FERC:
  Paiute...........................  General rate case      October 1992               (2)
  Paiute...........................  Order No. 636          December 1992       November 1993
                                     Restructuring
</TABLE>
 
- ---------------
 
(1) See Natural Gas Operations Segment -- Rates and Regulatory Proceedings of
    MD&A for a discussion of the Company's motion for reconsideration and the
    PSCN's decision to rehear several rate case issues.
 
(2) Interim rates reflecting the increased revenues became effective in April
    1993. However, the rates are subject to refund until a final order is
    issued.
 
                                        3
<PAGE>   8
 
     See Natural Gas Operations Segment - Rates and Regulatory Proceedings of
MD&A for a discussion of each of the Company's recent rate filings.
 
COMPETITION
 
     Electric utilities are the Company's principal competitors for the
residential and small commercial markets throughout the Company's service areas.
Competition for space heating, general household and small commercial energy
needs generally occurs at the initial installation phase when the customer
typically makes the decision as to which type of equipment to install and
operate. The customer will generally continue to use the chosen energy source
for the life of the equipment due to its relatively high replacement cost. As a
result of its success in these markets, the Company has experienced consistent
growth among the residential and small commercial customer classes.
 
     Unlike residential and small commercial customers, certain large
commercial, industrial and electric generation customers have the capability to
switch to alternative energy sources. Rates for these customers are set at
levels competitive with alternative energy sources such as fuel oils and coal.
The Company has been able to maintain the maximum allowable prices for most of
its alternate fuel capable customers. As a result of the Company's continued
success in these competitive situations, management does not anticipate any
material adverse impact on its operating margin. The Company maintains no
backlog on its orders for gas service.
 
     The Company continues to compete with interstate transmission pipeline
companies, such as El Paso Natural Gas Company (El Paso) and Kern River Gas
Transmission Company (Kern River), to provide service to end-users. End-use
customers located in close proximity to these interstate pipelines pose a
potential bypass threat and, therefore, require the Company to closely monitor
each customer's situation and provide competitive service in order to retain the
customer. The Company has experienced no significant financial impact to date
from the threat of bypass, although industry restructuring as a result of the
capacity release provisions of FERC Order No. 636 could increase the viability
of enduse customer bypass directly to interstate pipeline companies.
 
     A new interstate pipeline company, Tuscarora Gas Transmission Company
(Tuscarora), has applied for FERC certification to build a pipeline which would
compete with Paiute's fully subscribed pipeline by providing transportation
services within a portion of Paiute's current service area. The FERC, which has
jurisdiction over interstate gas pipelines, is currently reviewing the
application. A final decision from the FERC is expected in late 1994.
 
     Tuscarora's primary proposed customer would be Sierra Pacific Power Company
(Sierra), Paiute's largest customer and an entity which is affiliated with
Tuscarora. Sierra has indicated it would utilize the Tuscarora pipeline, if it
is constructed, for transportation of a significant portion of its natural gas
requirements related to its electric generation plants and its LDC customers.
However, Sierra has also signed a ten-year contract with Paiute, which became
effective in February 1993, through which Paiute provides firm transportation
service to Sierra for these same electric generation plants and LDC customers. A
significant portion of the revenues associated with this long-term contract are
fixed, regardless of the volumes transported. During 1993, Sierra contributed
$9.7 million, or three percent, of total Company margin.
 
     It is not yet known if Tuscarora will proceed with the project. If
constructed, competition from the Tuscarora pipeline could affect the future
growth of Paiute. However, Sierra has indicated it plans to continue using
Paiute for natural gas deliveries, regardless of whether the Tuscarora pipeline
is constructed, because of the strong and steady demand for natural gas in the
area. Paiute is continuing with its current expansion plans to meet the demands
associated with other customer commitments.
 
DEMAND FOR NATURAL GAS
 
     Deliveries of natural gas by the Company are made under a priority system
established by each regulatory commission having jurisdiction over the Company.
The priority system is intended to ensure that the gas requirements of
higher-priority customers, primarily residential customers and nonresidential
customers who use 50,000 cubic feet of gas per day or less, are fully satisfied
on a daily basis before lower-priority customers,
 
                                        4
<PAGE>   9
 
primarily electric utility and large industrial customers able to use
alternative fuels, are provided any quantity of gas or capacity.
 
     Demand for natural gas is greatly affected by temperature. On cold days,
use of gas by residential and commercial customers may be as much as eight times
greater than on warm days because of increased use of gas for space heating. To
fully satisfy this increased high-priority demand, gas is withdrawn from
storage, peaking supplies are purchased from suppliers, or service to
interruptible lower priority customers is curtailed as necessary to provide the
needed delivery system capacity.
 
     The industrial and commercial sectors are expected to demand greater
quantities of natural gas in meeting new environmental standards enacted by
local, state and federal governments. The Clean Air Act Amendments of 1990, for
example, set new national clean air standards which will continue to increase
the use of natural gas in industrial and power plant boilers, and in the fueling
of motor vehicle fleets. A key element of the law allows industries to choose
cost-effective options to meet the new standards. The comparatively low cost and
clean-burning characteristics of natural gas make it an economical and
environmentally safe option for industrial applications. The Company is
supplying these expanding markets.
 
NATURAL GAS SUPPLY
 
     With respect to natural gas supply, there is a free market for natural gas
at the wellhead. During 1991, price ceilings on wells drilled after July 1989
were abolished and the remaining price ceilings on existing wells were abolished
in January 1993. The elimination of price ceilings has had no direct impact on
the Company because natural gas is selling well below the previous regulatory
ceilings, and supplies are adequate. The last few years have generally
demonstrated seasonal volatility in the price of natural gas, with higher prices
in the heating season and lower prices during the summer or off-peak consumption
period.
 
     The Company believes that natural gas supplies will remain plentiful and
readily available. The Company primarily obtains its gas supplies for its
southern system from producing regions in New Mexico (San Juan basin), Texas
(Permian basin) and Oklahoma (Anadarko basin). For its northern system, the
Company primarily obtains gas from Rocky Mountain producing areas and from
Canada. The Company arranges for transportation of gas to its Arizona, Nevada
and California service territories through the pipeline systems of El Paso, Kern
River, Northwest Pipeline Corporation and Southern California Gas Company
(SoCal). The Company continually monitors supply availability on both short-term
and long-term bases to ensure the continued reliability of service to its
customers.
 
     The Company's primary objective with respect to gas supply is to ensure
that adequate, as well as economical, supplies of natural gas are available from
reliable sources. The Company acquires its gas from a wide variety of sources,
including suppliers on the spot market and those who provide firm supplies over
short-term and longer-term durations. Balancing firm supply assurances against
the associated costs dictate a continually changing natural gas purchasing mix
within the Company's supply portfolio. The Company believes its portfolio
provides security as well as the operating flexibility needed to meet changing
market conditions. During 1993, the Company acquired gas supplies from nearly 60
suppliers.
 
     In March 1993, the Company signed a "Wholesale Gas Transportation and
Storage Service Agreement" with SoCal, in which SoCal agreed to serve as the
Company's primary gas transporter to its southern California jurisdiction. The
agreement also provided limited gas storage to the Company for use in its
southern California jurisdiction. CPUC approval of the agreement was granted in
July 1993. The agreement was effective in August 1993 for an initial period of
15 years. The Company concurrently terminated its relationship with Pacific Gas
and Electric Company (PG&E) as its wholesale gas supplier and restructured its
tariff to offer a wider array of unbundled sales and transportation services.
The Company now secures all of its gas supplies for its southern California
jurisdiction directly from suppliers, as it does for its other jurisdictions.
 
     Natural Gas Industry Changes. In 1992, the FERC issued Order No. 636 and
amendments thereto (Order No. 636). Order No. 636 required open-access
interstate pipelines to significantly restructure their services prior to the
1993/94 winter heating season. Open-access interstate pipelines were required to
implement a new method of rate design and to provide the information necessary
for natural gas buyers and
 
                                        5
<PAGE>   10
 
sellers to arrange gas sales and transportation service on a more flexible
basis. Additionally, pipelines were required to offer storage as a separate
service, and to release this storage, if available, for use by transportation
customers. Order No. 636 also required the implementation of a capacity release
program whereby shippers can release available pipeline capacity on a temporary
or permanent basis. The complete impact of implementation of Order No. 636 on
the pipelines servicing the Company is not fully determinable at this time.
However, as a result of the new method of rate design, the Company is
experiencing higher costs. Management anticipates full recovery of the costs
through its PGA provisions.
 
     Because of these and other natural gas industry changes, the Company
continues to evaluate natural gas storage as an option to enable the Company to
take advantage of seasonal price differentials and to otherwise protect the
Company from the uncertainties associated with spot market purchases and the
Company's need to obtain natural gas from a variety of sources.
 
     In November 1992, in order to increase its options concerning gas supplies,
the Company and SoCal signed an agreement allowing the Company to use a portion
of SoCal's underground natural gas storage facilities, subject to the precedent
satisfaction of certain conditions. The agreement, subject to the precedent
conditions, would allow the Company to store up to ten billion cubic feet of
natural gas in SoCal's storage facilities and provide for firm redeliveries of
the storage gas at a maximum rate of 300 million cubic feet of gas per day. The
agreement becomes effective, for a term of 15 years, only if certain significant
precedent conditions are fully satisfied. The conditions include regulatory
approvals, negotiation of agreements with third parties integrally involved in
transporting gas to and from the storage facilities, and completion of economic
feasibility studies. In November 1993, the CPUC issued a resolution approving
the agreement, subject to the condition that the CPUC reserve the right to
reevaluate the rates underlying the agreement at any time and at its own
discretion. The Company believes the resolution, and the conditions therein,
seriously impaired the original long-term intent of the parties, and has
formally rejected the resolution. The agreement will, therefore, require
modification or cancellation and may be renegotiated to a shorter term than
originally desired. There is currently no assurance that the agreement can be
successfully renegotiated or that all of the precedent conditions can be
satisfactorily resolved. Each of the conditions is significant and, individually
or cumulatively, if not satisfactorily resolved, could result in cancellation of
this agreement. It is currently anticipated that each of these issues will be
addressed during 1994.
 
ENVIRONMENTAL MATTERS
 
     The Company's activities do not pollute air, land or water in any
significant manner. Accordingly, federal, state and local laws and regulations
governing the discharge of materials into the environment have little direct
impact upon either the Company or its subsidiaries. The Company is committed to
protecting and improving the environment. Management believes that the practices
and procedures of the Company are environmentally sound and do not harm the
environment in any significant manner.
 
     Environmental efforts, with respect to matters such as protection of
endangered species and archeological finds, have resulted in the Company
spending a greater amount of time in obtaining pipeline rights-of-way and sites
for other facilities. However, increased environmental legislation and
regulation are also perceived to be beneficial to the natural gas industry.
Because natural gas is one of the most environmentally safe fuels currently
available, its use will allow energy users to comply with stricter environmental
standards. For example, management is of the opinion that legislation, such as
the Clean Air Act Amendments of 1990 and the Energy Policy Act of 1992, has a
positive effect on natural gas demand, including provisions encouraging the use
of natural gas vehicles, cogeneration and independent power production.
 
EMPLOYEES
 
     At December 31, 1993, the natural gas operations segment had 2,318 regular
full-time employees. The Company believes it has a good relationship with its
employees. None of the employees are represented by a union.
 
     Reference is hereby made to Item 10 in Part III of this report on Form 10-K
for information relative to the executive officers of the Company.
 
                                        6
<PAGE>   11
 
                         FINANCIAL SERVICES ACTIVITIES
 
GENERAL DESCRIPTION
 
     The Bank is a federally chartered stock savings bank conducting business
through branch offices in Nevada. During 1993, the Bank exited the metropolitan
Phoenix, Arizona market through the sale of its Arizona branch operations. The
Bank was organized in 1955 as Nevada Savings and Loan Association which, in
1988, changed its name to PriMerit Bank and its charter from a state chartered
stock savings and loan association to a federally chartered stock savings bank.
The Bank's deposit accounts are insured to the maximum extent permitted by law
by the Federal Deposit Insurance Corporation (FDIC) through the Savings
Association Insurance Fund (SAIF). The Bank is regulated by the Office of Thrift
Supervision (OTS) and the FDIC, and is a member of the Federal Home Loan Bank
(FHLB) system.
 
     The Bank's principal business is to attract deposits from the general
public and make loans secured by real estate and other collateral to enable
borrowers to purchase, refinance, construct or improve such property. Revenues
are derived from interest on real estate loans and debt securities and, to a
lesser extent, from interest on nonmortgage loans, gains on sales of loans and
debt securities, and fees received in connection with loans and deposits. The
Bank's major expense is the interest it pays on savings deposits and borrowings.
 
     The Bank had been active in single-family residential real estate
development until stringent regulatory capital requirements were imposed by the
Financial Institutions Reform, Recovery and Enforcement Act (FIRREA). The Bank
has ceased making further investments in new real estate projects and is
divesting its remaining real estate investments.
 
     Since December 31, 1989 total assets have declined from $2.8 billion to
$1.8 billion at December 31, 1993 as management restructured the balance sheet
to more effectively operate under the guidelines of the FIRREA. The decrease is
also part of a long-term Strategic Business Plan "right size-right structure"
strategy to optimize the Bank's size.
 
     While the low interest rate environment has had a beneficial impact on the
Bank's cost of funds, it has also accelerated prepayments in the Bank's loan and
debt security portfolios as borrowers refinance variable-rate and higher
fixed-rate debt with relatively low fixed-rate loans. The replacement of these
higher rate assets with lower yielding assets, partially offsets the benefit of
the lower cost of funds.
 
     The following table sets forth certain ratios for the Bank for each of the
periods stated:
 
<TABLE>
<CAPTION>
                                                             FOR THE YEAR ENDED DECEMBER 31,
                                                        -----------------------------------------
                                                        1993     1992     1991      1990     1989
                                                        ----     ----     -----     ----     ----
<S>                                                     <C>      <C>      <C>       <C>      <C>
Return on average assets (net earnings
  divided by average total assets)....................   0.3%    (0.5)%    (1.2)%    0.4%     0.5%
Return on average equity (net earnings
  divided by average stockholder's equity)............   4.0     (6.0)    (17.2)     5.8      8.5
Equity-to-assets ratio (average stockholder's
  equity divided by average total assets).............   8.2      7.5       6.7      6.1      5.9
</TABLE>
 
LENDING ACTIVITIES
 
     The Bank's loan portfolio totaled $837 million at December 31, 1993,
representing 48 percent of total assets at that date. The loan portfolio
consists principally of intermediate-term and long-term real estate loans and,
to a lesser extent, secured and unsecured commercial loans, and consumer loans
including: credit cards, home improvement, recreational vehicle, mobile home,
marine and auto loans. During 1993, the Bank agreed to sell its credit card
portfolio and enter into an agent bank relationship with the purchaser to issue
credit cards to the Bank's customers. The sale was completed in 1994 at which
time the Bank recognized a gain of $1.7 million. The contractual maturity of
loans secured by single-family dwellings has historically been 30 years,
although in recent years the Bank has made a number of loans with maturities of
23 years or less. As interest rates have declined, particularly during 1992 and
1993, prepayments of existing mortgages have substantially accelerated.
 
                                        7
<PAGE>   12
 
     The following table sets forth the composition of the loan portfolio by
type of loan at the dates indicated (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                           --------------------------------------------------------
                                             1993       1992       1991        1990         1989
                                           --------   --------   --------   ----------   ----------
<S>                                        <C>        <C>        <C>        <C>          <C>
Loans collateralized by real estate:
  Conventional single-family
     residential.........................  $436,853   $395,976   $497,448   $  624,414   $  625,608
  FHA and VA insured single-family
     residential.........................    25,051     24,670     35,563       25,221       19,552
  Commercial mortgage....................   192,046    198,235    212,518      195,118      211,386
  Construction and land(1)...............    82,638     91,344    120,776      174,068      165,396
                                           --------   --------   --------   ----------   ----------
                                            736,588    710,225    866,305    1,018,821    1,021,942
Commercial secured (other than real
  estate)................................    25,443     30,137     26,736       24,469       15,089
Commercial unsecured.....................       354        384      3,966        6,339        5,790
Consumer installment.....................    93,431     42,444     53,537       87,475       39,936
Consumer unsecured (including credit
  cards).................................    19,309     18,371     16,568       13,445       14,546
Equity and property improvement loans....    21,061     16,712     14,287       11,012       11,588
Deposit accounts.........................     2,944      4,248      5,122        5,589        5,658
                                           --------   --------   --------   ----------   ----------
                                            899,130    822,521    986,521    1,167,150    1,114,549
                                           --------   --------   --------   ----------   ----------
Undisbursed proceeds.....................   (48,251)   (44,937)   (44,544)     (64,465)     (80,089)
Allowance for estimated credit losses....   (16,251)   (17,228)   (12,061)      (3,646)      (4,384)
Premiums (discounts).....................     3,270       (125)    (1,294)      (1,285)      (2,990)
Deferred fees............................    (4,782)    (4,406)    (6,678)      (6,232)      (4,667)
Accrued interest.........................     4,214      4,586      6,358        8,619        9,819
                                           --------   --------   --------   ----------   ----------
                                            (61,800)   (62,110)   (58,219)     (67,009)     (82,311)
                                           --------   --------   --------   ----------   ----------
Loans receivable.........................  $837,330   $760,411   $928,302   $1,100,141   $1,032,238
                                           --------   --------   --------   ----------   ----------
                                           --------   --------   --------   ----------   ----------
</TABLE>
 
- ---------------
 
(1) The Bank's portfolio of construction loans is generally due in one year or
    less.
 
  Loan Origination and Credit Risk
 
     One of the Bank's primary businesses is to make and acquire loans secured
by real estate and other collateral to enable borrowers to purchase, refinance,
construct and improve such property. These activities entail potential credit
losses, the size of which depends on a variety of economic factors affecting
borrowers and the real estate collateral. While the Bank has adopted
underwriting guidelines and credit review procedures to minimize credit losses,
some losses will inevitably occur. Therefore, periodic reviews are made of the
assets in an attempt to identify and deal appropriately with potential credit
losses.
 
     The Bank originates both fixed and adjustable-rate loans in the
single-family residential, commercial mortgage, and consumer home equity
portfolios. The Bank's adjustable-rate loans in these portfolios are based on
various indices, including the prime rate, the 11th District cost of funds, the
one-year U.S. Treasury yield, and various other indices to a lesser extent.
Other consumer loans are generally fixed-rate, while construction and non-real
estate commercial loans are generally adjustable-rate prime-based loans.
 
     Many of the Bank's adjustable-rate loans contain limitations as to both the
amount and the interest rate change at each repricing date (periodic caps) and
the maximum rates the loan can be repriced over the life of the loan (lifetime
caps). At December 31, 1993, periodic caps in the adjustable loan portfolio
ranged from .25 percent to eight percent. Lifetime caps ranged from 9.75 percent
to 22 percent.
 
     See Financial Services Segment -- Risk Management -- Interest Rate Risk
Management of MD&A for the Bank's static gap table which includes the maturity
and repricing sensitivity of the Bank's loan portfolio.
 
     The Bank's loan policies and underwriting standards are the primary means
used to reduce credit risk exposure. The loan approval process is intended to
assess both: (i) the borrower's ability to repay the loan by
 
                                        8
<PAGE>   13
 
determining whether the borrower meets the established underwriting criteria;
and (ii) the adequacy of the proposed collateral by determining whether the
appraised value of (and, if applicable, the cash flow from) the collateral
property is sufficient for the proposed loan. Under OTS regulations, management
is held responsible for developing, implementing and maintaining prudent
appraisal policies.
 
     The Bank's Credit Administration Department is responsible for adherence to
approved lending policies and procedures, including proper approvals, timely
completion of quarterly asset reviews, early identification of problem loans,
reviewing the quality of underwriting and appraisals, tracking trends in asset
quality and evaluating the adequacy of the allowance for credit losses.
 
     As part of the regular asset review process, management reviews factors
relating to the possibility and magnitude of prospective loan and real estate
losses, including historical loss experience, prevailing market conditions and
classified asset levels. The Bank is required to classify assets and establish
prudent valuation allowances in accordance with OTS regulations.
 
     Each loan portfolio contains unique credit risks for which the Bank has
developed policies and procedures to manage as follows:
 
     Single-Family Residential Lending. Single-family residential mortgage loans
comprise 55 percent of the Bank's loan portfolio at December 31, 1993 compared
to 55 percent at December 31, 1992. This portfolio represents the largest
lending component and is the component which contains the least credit risk.
 
     It is the general policy of the Bank not to make single-family residential
loans which have a loan-to-value ratio in excess of 80 percent unless insured by
private mortgage insurance, Federal Housing Authority (FHA) insurance or
guaranteed by the Veterans Administration (VA). Single-family loans are
generally underwritten to underwriting guidelines established by FHA, VA,
Federal Home Loan Mortgage Corporation (FHLMC), Federal National Mortgage
Association (FNMA) or preapproved private investors.
 
     The Bank requires title insurance on all loans secured by liens on real
property. The Bank also requires fire and other hazard insurance be maintained
in amounts at least equal to the replacement cost of improvements on all
properties securing its loans. If the subject property is located in a flood
plain, special flood insurance is required.
 
     Consumer Lending. Consumer loans include installment loans secured by
recreational vehicles, boats, autos and mobile homes, credit card receivables,
home equity loans, and loans secured by deposit accounts. Approximately 86
percent of the consumer loan portfolio is collateralized. The credit risk of the
consumer loan portfolio is managed through both the origination function and the
collection process. All consumer loan origination and collection efforts, except
those secured by deposits, are performed at a central location in order to
provide greater control in the process and a more uniform application of credit
standards.
 
     The Bank originates a majority of its installment loans through automobile,
recreational vehicle and marine vehicle dealers. These loans are subject to
underwriting by Bank personnel. Additionally, credit reviews of the dealers are
performed on a periodic basis.
 
     The Bank utilizes a bankruptcy predictor model to assist in the analysis of
loan applications and credit reports. Additionally, as a follow up to the
application process, a review of selected originations is performed to monitor
adherence to credit standards.
 
     Commercial and Construction. The commercial and construction portfolios
consist of amortizing mortgage loans on multi-family residential and
nonresidential real estate, construction and development loans secured by real
estate, and commercial loans secured by collateral other than real estate.
Construction loans and commercial/income property loans are generally
underwritten with a discounted loan-to-value ratio of less than 75 percent.
 
     The Bank manages its risk in these portfolios through its credit
evaluation, approval and monitoring processes. In addition to obtaining
appraisals on real estate collateral based loans, a review of actual and
forecasted financial statements and cash flow analyses is performed. After such
loans are funded, they are monitored by obtaining and analyzing current
financial and cash flow information on a periodic basis.
 
                                        9
<PAGE>   14
 
     To further control its credit risk in this portfolio, the Bank monitors and
manages credit exposure on portfolio concentrations. The Bank's Risk Management
Committee and Credit Administration Department regularly monitor portfolio
concentrations by collateral types, industry groups, loan types, and individual
and related borrowers. Such concentrations are assessed and exposures managed
through establishment of limitations of aggregate exposures. The Bank has ceased
originating new construction and commercial loans in California and Arizona to
reduce the level of credit risk in its portfolio. Construction loans and
commercial real estate loans (including multi-family) generally have higher
default rates than single-family residential loans. See Financial Services
Segment -- Risk Management -- Credit Risk Management of MD&A for a table that
sets forth the amounts of classified assets by type of loan.
 
  Origination, Purchase and Sale of Loans
 
     The Bank originates the majority of its loans within the state of Nevada;
however, under current laws and regulations, the Bank may also originate and
purchase loans or purchase participating interests in loans without regard to
the location of the secured property. During 1993, the Bank originated $500
million in new loans, of which 90 percent were secured by property located in
Nevada, eight percent were secured by property located in Arizona and two
percent were secured by property located in California. During 1992, the Bank
originated $518 million in new loans, of which 84 percent were secured by
property located in Nevada, ten percent were secured by property located in
Arizona, and six percent were secured by property in California. As of December
31, 1993, 80 percent of the Bank's loan portfolio was secured by property
located in Nevada, 11 percent secured by property located in California and
eight percent secured by property located in Arizona. The Bank originates real
estate and commercial loans principally through its in-house personnel.
 
  Secondary Marketing Activity
 
     The Bank has been involved in secondary mortgage market transactions
through the sale of whole loans. In accordance with the Bank's accounting
policy, fixed-rate residential loans with maturities greater than 25 years have
been designated as held for sale. At December 31, 1993, $8.6 million of
residential loans are designated as held for sale. See Note 4 of the Notes to
Consolidated Financial Statements for additional discussion relating to such
loans.
 
     The Bank developed a comprehensive long-term Strategic Business Plan (the
Plan) in order to reduce the level of interest rate, liquidity and prepayment
risks. The Plan included a review of the Bank's balance sheet size, asset mix
between fixed-rate and variable-rate assets, and interest rate risk. As a result
of this review, the Bank began execution of a strategy to restructure its
balance sheet, and changed its accounting policy with regard to loans held for
investment versus held for sale. The Bank's balance sheet restructuring involved
the sale of all fixed-rate singlefamily mortgage loans and mortgage-backed
securities (MBS) with remaining maturities greater than or equal to 25 years,
canceling interest rate swaps which hedged the interest rate risk of those
assets, and reinvesting the proceeds of these sales in adjustable-rate debt
securities and five-year fixed-rate balloon debt securities.
 
     The Bank's accounting policy was amended to designate all fixed-rate loans
with maturities greater than or equal to 25 years (which possess normal
qualifying characteristics required for sale) as held for sale, along with loans
originated for specific sales commitments. Fixed-rate loans with maturities less
than 25 years, and all adjustable-rate loans continue to be held for investment.
 
     In conjunction with the balance sheet restructuring, during 1992, the Bank
sold $152 million of single-family residential fixed-rate loans, $241 million of
fixed-rate debt securities with contractual maturities greater than 25 years,
and canceled $300 million (notional amount) of interest rate swaps hedging these
assets.
 
     Under its loan participation and whole loan sale agreements, the Bank may
continue to service the loans and collect payments on the loans as they become
due. The amount of loans serviced for others was $477 million at December 31,
1993, compared to $576 million at year-end 1992, including $93 million and $145
million, respectively, of loans serviced for MBS originated and owned by the
Bank. The Bank pays the participating lender, under the terms of the
participation agreement, a yield on the participant's portion of the
 
                                       10

<PAGE>   15
 
loan, which is usually less than the interest agreed to be paid by the borrower.
The difference is retained by the Bank as servicing income.
 
     In connection with mortgage loan sales, the Bank makes representations and
warranties customary in the industry relating to, among other things, compliance
with laws, regulations and program standards and accuracy of information. In the
event of a breach of these representations and warranties, or under certain
limited circumstances, regardless of whether there has been such a breach, the
Bank may be required to repurchase such mortgage loans. Typically, any
documentation defects with respect to these mortgage loans that caused them to
be repurchased, are corrected and the mortgage loans are resold. Certain
repurchased mortgage loans may remain in the Bank's loan portfolio and, in some
cases, repurchased mortgage loans are foreclosed and the acquired real estate
sold.
 
  Loan Fees
 
     The Bank receives loan origination fees for originating loans and
commitment fees for making commitments to originate construction, income
property and multi-family residential loans. It also receives loan fees and
charges related to existing loans, including prepayment charges, late charges
and assumption fees. The amount of loan origination fees, commitment fees and
discounts received varies with loan volumes, loan types, purchase commitments
made, and competitive and economic conditions. Loan origination and commitment
fees, offset by certain direct loan origination costs, are being deferred and
recognized over the contractual life of such loans as yield adjustments.
 
ASSET QUALITY
 
     Nonperforming Assets. Nonperforming assets may be comprised of nonaccrual
assets, restructured loans and real estate acquired through foreclosure.
Nonaccrual assets are those on which management believes the timely collection
of interest is doubtful. Assets are transferred to nonaccrual status when
payments of interest or principal are 90 days past due or if, in management's
opinion, the accrual of interest should be ceased sooner. There are no assets on
accrual status which are over 90 days delinquent or past maturity.
 
     Management reviews and takes into consideration the results of internal
loan reviews and assessments of the effect of current and expected future
economic conditions on the loan and debt security portfolios. As part of the
internal loan review process and through regulatory examination, assets are
classified when deemed to contain more than acceptable levels of risk. Once an
asset is placed on nonaccrual status, all previously accrued but uncollected
interest is reversed from income and interest income is no longer recognized
unless paid. Nonaccrual assets are restored to accrual status when, in the
opinion of management, the financial condition of the borrower and/or debt
service capacity of the security property has improved to the extent that
collectibility of interest and principal appears assured and interest payments
sufficient to bring the asset current are received. Loans to joint ventures for
real estate development in which the Bank is either a participant or an equity
participant are excluded from nonperforming assets because these types of loans
are classified and accounted for as real estate investments under generally
accepted accounting principles (GAAP).
 
                                       11
<PAGE>   16
 
     The following table summarizes nonperforming assets as of the dates
indicated (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31,
                                           -------------------------------------------------------
                                            1993        1992        1991        1990        1989
                                           -------     -------     -------     -------     -------
<S>                                        <C>         <C>         <C>         <C>         <C>
Nonaccrual loans past due 90 days or
  more:
  Mortgage loans:
     Construction and land...............  $ 1,233     $ 8,514     $ 8,904     $ 6,599     $ 2,090
     Permanent single-family
       residences........................    6,636       4,667       7,737       4,467       4,239
     Other mortgage loans................    6,728       3,736      10,388       9,405         605
                                           -------     -------     -------     -------     -------
                                            14,597      16,917      27,029      20,471       6,934
  Nonmortgage loans......................      184       2,164          87         331       1,168
Restructured loans.......................    2,842       1,190       1,229       1,385         505
                                           -------     -------     -------     -------     -------
          Total nonperforming loans......   17,623      20,271      28,345      22,187       8,607
Real estate acquired through foreclosure
  .......................................    9,707      24,488      14,875      10,363      12,174
                                           -------     -------     -------     -------     -------
          Total nonperforming assets.....  $27,330     $44,759     $43,220     $32,550     $20,781
                                           -------     -------     -------     -------     -------
                                           -------     -------     -------     -------     -------
Allowance for estimated credit losses....  $16,251     $17,228     $12,061     $ 3,646     $ 4,384
                                           -------     -------     -------     -------     -------
                                           -------     -------     -------     -------     -------
Allowance for estimated credit losses as
  a percentage of nonperforming loans....    92.21%      84.99%      42.55%      16.43%      50.94%
                                           -------     -------     -------     -------     -------
                                           -------     -------     -------     -------     -------
Allowance for estimated credit losses as
  a percentage of nonperforming assets...    59.46%      38.49%      27.91%      11.20%      21.10%
                                           -------     -------     -------     -------     -------
                                           -------     -------     -------     -------     -------
</TABLE>
 
     At December 31, 1993, all nonaccrual loans and real estate acquired through
foreclosure are classified substandard. Additionally, $280,000 of the
restructured loans are classified substandard.
 
     The amount of interest income that would have been recorded on the
nonaccrual and restructured assets if they had been current under their original
terms was $1.5 million for 1993. Actual interest income recognized on these
assets was $870,000, resulting in $640,000 of interest income foregone for the
year. See further discussion below in Provision and Allowance for Credit Losses.
 
     Classified Assets. OTS regulations require the Bank to classify certain
assets and establish prudent valuation allowances. Classified assets fall in one
of three categories -- "substandard," "doubtful" and "loss." In addition, the
Bank can designate an asset as "special mention."
 
     Assets classified as "substandard" are inadequately protected by the
current net worth or paying capacity of the obligor or the collateral pledged,
if any. Assets which are designated as "special mention" possess weaknesses or
deficiencies deserving close attention, but do not currently warrant
classification as "substandard." See Financial Services Segment -- Risk
Management -- Credit Risk Management of MD&A for the amounts of the Bank's
classified assets and ratio of classified assets to total assets, net of
charge-offs.
 
     Provision and Allowance for Credit Losses. The provision for credit losses
is dependent upon management's evaluation as to the amount needed to maintain
the allowance for losses at a level considered appropriate to the perceived risk
of future losses. A number of factors are weighed by management in determining
the adequacy of the allowance, including internal analyses of portfolio quality
measures and trends, specific economic and market conditions affecting valuation
of the security properties and certain other factors. In addition, the OTS
considers the adequacy of the allowance for credit losses and the net carrying
value of real estate owned in connection with periodic examinations of the Bank.
The OTS may require the Bank to recognize additions to the allowance or
reductions in the net carrying value of real estate owned based on their
judgement at the time of such examinations. The OTS completed its examination of
the Bank in February 1994. It deemed that the Bank's allowance for credit losses
was adequate. The FDIC has indicated that it will not examine the Bank during
1994.
 
                                       12
<PAGE>   17
 
     Activity in the allowances for credit losses on loans and real estate is
summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                            REAL          REAL
                                                                           ESTATE        ESTATE
                                     CONSTRUCTION     NON-                ACQUIRED      HELD FOR
                          MORTGAGE      & LAND      MORTGAGE    TOTAL      THROUGH       SALE OR
                           LOANS        LOANS        LOANS      LOANS    FORECLOSURE   DEVELOPMENT   OTHER    TOTAL     RATIO*
                          --------   ------------   --------   -------   -----------   -----------   -----   --------   -----
<S>                       <C>        <C>            <C>        <C>       <C>           <C>           <C>     <C>        <C>
Balance at 12/31/88.....  $ 1,959      $    700     $   587    $ 3,246     $ 3,731       $ 1,675     $  --   $  8,652
Provisions for estimated
  losses................      884           200         639      1,723       1,506           600        --      3,829
Charge-offs, net of
  recoveries............      (51 )          --        (717)      (768)     (3,092)           --        --     (3,860)   .33%
Transfers...............     (597 )          --          --       (597)        597            --        --         --
Acquired allowance......       40            --         740        780         433            --        --      1,213
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/89.....    2,235           900       1,249      4,384       3,175         2,275        --      9,834
Provisions for estimated
  losses................    1,201           399       1,669      3,269       2,500         2,000        --      7,769
Charge-offs, net of
  recoveries............     (657 )          --      (1,166)    (1,823)     (3,233)         (117)       --     (5,173)   .43%
Transfers...............   (1,645 )          --        (539)    (2,184)      1,645            --       539         --
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/90.....    1,134         1,299       1,213      3,646       4,087         4,158       539     12,430
Provisions for estimated
  losses................    5,835         2,643       3,580     12,058       1,686        49,010        --     62,754
Charge-offs, net of
  recoveries............     (394 )      (1,121)     (1,545)    (3,060)     (6,595)      (49,529)      (62)   (59,246)  5.86%
    Transfers...........     (583 )          --          --       (583)        822            --      (239)        --
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/91.....    5,992         2,821       3,248     12,061          --         3,639       238     15,938
Provisions for estimated
  losses................    1,903         6,460       5,766     14,129          --        18,309        --     32,438
Charge-offs, net of
  recoveries............     (515 )      (3,765)     (4,682)    (8,962)         --       (20,485)       --    (29,447)  3.29%
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/92.....    7,380         5,516       4,332     17,228          --         1,463       238     18,929
Provisions for estimated
  losses................    4,634           172       1,406      6,212          --         1,010        --      7,222
Charge-offs, net of
  recoveries............   (3,191 )      (2,248)     (1,750)    (7,189)         --        (1,538)       --     (8,727)  1.07%
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/93.....  $ 8,823      $  3,440     $ 3,988    $16,251     $    --       $   935     $ 238   $ 17,424
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
                          --------   ------------   --------   -------   -----------   -----------   -----   --------
</TABLE>
 
- ---------------
 
* Ratio = Net charge-offs to average loans and real estate outstanding
 
     Included in net charge-offs are $421,000, $1.7 million, $1.4 million, $1.9
million, and $2.6 million of recoveries for 1989 through 1993, respectively.
 
     The real estate write-downs for 1992 were primarily the result of a
decrease in the net realizable value and slower sales activity of five
California single-family real estate development projects. The largest of these
involved write-downs of $9.3 million as a result of an appraisal reflecting the
continuing market decline in the California market and difficulty in obtaining
third party construction financing.
 
     The increase in the allowance for estimated credit losses as a percentage
of nonperforming loans from 85 percent at December 31, 1992 to 92 percent at
December 31, 1993, was due primarily to higher provisions for the single-family
and consumer loan portfolios and debt security portfolio offset by decreases in
real estate acquired through foreclosure.
 
     Prior to the fourth quarter of 1991, the Bank established specific
valuation allowances for identified probable losses on assets in its portfolio.
During the fourth quarter of 1991, the Bank adopted a policy of charging off
assets against previously established specific valuation allowances and directly
charging off any newly identified probable losses on specific assets, thus
directly reducing the carrying value of the asset.
 
                                       13
<PAGE>   18
 
     Allocation of Allowance for Credit Losses. The following is a breakdown of
allocated loan loss allowance amounts by major categories. However, in
management's opinion, the allowance must be viewed in its entirety.
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,
        -------------------------------------------------------------------------------------------------------------------------
<S>     <C>          <C>         <C>          <C>         <C>          <C>         <C>          <C>         <C>          <C>
                1993                     1992                     1991                     1990                     1989
        ---------------------    ---------------------    ---------------------    ---------------------    ---------------------
 
<CAPTION>
                                                         (THOUSANDS OF DOLLARS)
                     PERCENT                  PERCENT                  PERCENT                  PERCENT                  PERCENT
                     OF LOANS                 OF LOANS                 OF LOANS                 OF LOANS                 OF LOANS
        ALLOWANCE    TO TOTAL    ALLOWANCE    TO TOTAL    ALLOWANCE    TO TOTAL    ALLOWANCE    TO TOTAL    ALLOWANCE    TO TOTAL
         AMOUNT       LOANS       AMOUNT       LOANS       AMOUNT       LOANS       AMOUNT       LOANS       AMOUNT       LOANS
        ---------    --------    ---------    --------    ---------    --------    ---------    --------    ---------    --------
<S>     <C>          <C>         <C>          <C>         <C>          <C>         <C>          <C>         <C>          <C>
LOANS
 BY
 TYPE
Real
estate...  $ 8,823      76.9%     $ 7,380        81.2%     $ 5,992        82.4%     $ 1,134        84.4%     $ 2,235        90.8%
Construction
  and                                                
  land...    3,440       4.0        5,516         4.3        2,821         4.8        1,299         4.9          900         2.3
Nonmortgage. 3,988      19.1        4,332        14.5        3,248        12.8        1,213        10.7        1,249         6.9
         ---------   --------    ---------    --------    ---------    --------    ---------    --------    ---------    --------
  Total... $16,251     100.0%     $17,228       100.0%     $12,061       100.0%     $ 3,646       100.0%     $ 4,384       100.0%
         ---------   --------    ---------    --------    ---------    --------    ---------    --------    ---------    --------
         ---------   --------    ---------    --------    ---------    --------    ---------    --------    ---------    --------
</TABLE>
 
REAL ESTATE DEVELOPMENT ACTIVITIES
 
     The Bank's investment in real estate held for development, net of allowance
for estimated losses, excluding real estate acquired through foreclosure,
decreased from $28.1 million at December 31, 1991 to $4.1 million at December
31, 1993. The Bank's pretax loss from real estate operations was $910,000 in
1993, $15.3 million in 1992 and $50.5 million in 1991.
 
     At December 31, 1993, real estate held for sale or development principally
includes two former branch facilities not included in the sale of the Arizona
branch operations. See Note 5 of the Notes to Consolidated Financial Statements
for a summary of real estate held for sale or development and a summary of
income from real estate operations.
 
     The Bank and its subsidiaries have ceased making investments in new real
estate development activities as a result of legislative and regulatory actions
which have placed certain restrictions on the Bank's ability to invest in real
estate. See Regulation -- General herein for additional discussion. The Bank and
its subsidiaries are actively pursuing the development and sale of the remaining
real estate investments.
 
INVESTMENT ACTIVITIES
 
     Federal regulations require thrifts to maintain certain levels of liquidity
and to invest in various types of liquid assets. The Bank invests in a variety
of securities, including commercial paper, certificates of deposit, U.S.
government and U.S. agency obligations, short-term corporate debt, municipal
bonds, repurchase agreements and federal funds. The Bank also invests in longer
term investments such as MBS and collateralized mortgage obligations (CMO) to
supplement its loan production and to provide liquidity to meet unforeseen cash
outlays. Income from cash equivalents and debt securities provides a significant
source of revenue for the Bank, constituting 48 percent, 43 percent and 39
percent of total revenues for each of the years ended December 31, 1991, 1992
and 1993, respectively.
 
     On December 31, 1993, the Bank adopted Statement of Financial Accounting
Standards (SFAS) No. 115 "Accounting for Certain Investments in Debt and Equity
Securities." In conjunction with adoption, the Bank designated the vast majority
of its debt security portfolio as available for sale. At December 31, 1993, no
securities were designated as "trading securities." See Note 2 of the Notes to
Consolidated Financial Statements for further discussion.
 
                                       14
<PAGE>   19
 
     The following tables present the composition of the debt security
portfolios as of the dates indicated. See Financial Services Segment -- Capital
Resources and Liquidity of MD&A and Note 3 of the Notes to Consolidated
Financial Statements for further discussion of the portfolios:
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                      --------------------------------------
                                                        1993          1992           1991
                                                      --------     ----------     ----------
                                                              (THOUSANDS OF DOLLARS)
    <S>                                               <C>          <C>            <C>
    DEBT SECURITIES HELD TO MATURITY
    GNMA -- MBS.....................................  $     --     $   12,222     $  153,422
    FHLMC -- MBS....................................        --        629,225        351,398
    FNMA -- MBS.....................................        --        217,391        247,822
    CMO.............................................        --         37,722         13,411
    Corporate issue MBS.............................    69,660        229,303        320,373
    Money market instruments........................        --            100            100
    U.S. Treasury securities and obligations of U.S.
      Government corporations and agencies..........        --         15,996          9,960
    Medium-term notes...............................        --         17,018         54,077
                                                      --------     ----------     ----------
              Total.................................  $ 69,660     $1,158,977     $1,150,563
                                                      --------     ----------     ----------
                                                      --------     ----------     ----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                      --------------------------------------
                                                        1993          1992           1991
                                                      --------     ----------     ----------
                                                              (THOUSANDS OF DOLLARS)
    <S>                                               <C>          <C>            <C>
    DEBT SECURITIES AVAILABLE FOR SALE
    GNMA -- MBS.....................................  $  9,672     $    6,780     $       --
    FHLMC -- MBS....................................   379,786             --             --
    FNMA -- MBS.....................................   119,657             --             --
    CMO.............................................    47,249             --             --
    Corporate issue MBS.............................    24,106             --             --
    Money market instruments........................    10,036             --             --
    U.S. Treasury securities and obligations of U.S.
      Government corporations and agencies..........     5,220             --             --
                                                      --------     ----------     ----------
              Total.................................  $595,726     $    6,780     $       --
                                                      --------     ----------     ----------
                                                      --------     ----------     ----------
</TABLE>
 
     The following schedule of the expected maturity of debt securities held to
maturity is based upon dealer prepayment expectations and historical prepayment
activity (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                            EXPECTED MATURITY
                                           ------------------------------------------------------------------------------------
                                                                      AFTER          AFTER
                                                        AFTER       FIVE YEARS     TEN YEARS
                                                       ONE YEAR        BUT            BUT
                                           WITHIN       WITHIN        WITHIN        WITHIN       AFTER        TOTAL
                                             ONE         FIVE          TEN          TWENTY       TWENTY     AMORTIZED
                                            YEAR        YEARS         YEARS          YEARS       YEARS        COST        YIELD
                                           -------     --------     ----------     ---------     ------     ---------     -----
<S>                                        <C>         <C>          <C>             <C>           <C>        <C>          <C>   
Corporate issue MBS......................  $14,702     $34,665       $ 15,931       $ 3,566       $796       $69,660      6.85%
                                           -------     --------     ----------     ---------     ------     ---------     -----
    Total................................  $14,702     $34,665       $ 15,931       $ 3,566       $796       $69,660      6.85%
                                           -------     --------     ----------     ---------     ------     ---------     -----
                                           -------     --------     ----------     ---------     ------     ---------     -----
</TABLE>
 
                                       15
<PAGE>   20
 
     The expected maturities of MBS and CMO are based upon dealer prepayment
expectations and historical prepayment activity. The following schedule reflects
the expected maturities of MBS and CMO and the contractual maturity of all other
debt securities available for sale (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                        EXPECTED/CONTRACTUAL MATURITY
                                                  -------------------------------------------------------------------------
                                                              AFTER       AFTER        AFTER
                                                             ONE YEAR   FIVE YEARS   TEN YEARS
                                                               BUT         BUT          BUT                 TOTAL
                                                   WITHIN     WITHIN      WITHIN      WITHIN     AFTER    ESTIMATED
                                                    ONE        FIVE        TEN        TWENTY     TWENTY     FAIR
               DECEMBER 31, 1993                    YEAR      YEARS       YEARS        YEARS     YEARS      VALUE     YIELD
- ------------------------------------------------  --------   --------   ----------   ---------   ------   ---------   -----
<S>                                               <C>        <C>        <C>          <C>         <C>      <C>         <C>
GNMA -- MBS.....................................  $  4,050   $ 5,257     $    328     $    37     $--     $  9,672    8.41 %
FHLMC -- MBS....................................   120,630   221,834       27,475       9,558      289     379,786    6.12
FNMA -- MBS.....................................    31,090    65,419       14,353       8,517      278     119,657    6.60
CMO.............................................    18,535    28,446          240          28     --        47,249    4.82
Corporate issue MBS.............................     6,880    13,320        3,473         414       19      24,106    5.81
Money market instruments........................    10,036     --          --           --        --        10,036    3.37
U.S. Treasury securities and obligations of U.S.
  Government corporations and agencies..........     --        5,220       --           --        --         5,220    5.93
                                                  --------   --------   ----------   ---------   ------   ---------   -----
        Total...................................  $191,221   $339,496    $ 45,869     $18,554     $586    $595,726    6.09 %
                                                  --------   --------   ----------   ---------   ------   ---------   -----
                                                  --------   --------   ----------   ---------   ------   ---------   -----
</TABLE>
 
DEPOSIT ACTIVITIES
 
     Deposit accounts are the Bank's primary source of funds constituting 77
percent of the Bank's total liabilities at December 31, 1993. The Bank solicits
both short-term and long-term deposits in the form of transaction related and
certificate of deposit accounts, primarily through its 25 branch offices. The
Bank operates 17 branches in southern Nevada and eight branches in northern
Nevada. During 1993, the Bank exited the metropolitan Phoenix, Arizona market
through the sale of its Arizona branch operations.
 
     The Bank's average retail deposit base has remained steady during the past
three years, despite the effect of the Arizona sale, as a result of the
strategic decision to alter the Bank's liability mix from wholesale to retail
funding sources. Average retail deposits, as a percentage of average
interest-bearing liabilities, were 79 percent in 1993, compared to 83 percent in
1992 and 72 percent in 1991. The Bank has emphasized retail deposits over
wholesale funding sources in an effort to reduce the volatility of its cost of
funds. Additionally, the Bank has emphasized growth in transaction based
accounts versus term accounts in order to reduce its overall cost of funds. The
growth in retail deposits has been achieved through marketing programs,
increased emphasis on customer service and strong growth in southern Nevada.
 
     In conjunction with the strategy to increase the core retail deposit base, 
the Bank discontinued accepting long-term brokered deposits in 1988. At
December 31, 1993, the Bank had no brokered deposits, compared to $6.9 million
at December 31, 1992. The FDIC has issued regulations regarding a depository
institution's acceptance of brokered deposits. See Regulation -- General --
Deposit Activities herein for additional discussion.
 
     The Bank's deposits decreased $414 million during 1993. During 1993, the
Bank sold its Arizona branch operations, including $321 million in deposit
accounts, in conjunction with the goals to reduce the Bank's total asset size
and to shift the deposit mix toward a greater percentage of transaction
accounts. The Bank's deposit base in Arizona was largely term CD based. The sale
of the Arizona deposits was funded through the sale of debt securities. In
accordance with the Bank's strategy of reducing its reliance on wholesale
funding sources, wholesale deposits declined $4.5 million. The Bank has also
experienced an outflow of deposits during 1993 as a result of customers seeking
alternative investments to relatively low yielding insured deposits. Loan and
debt security repayments produced adequate sources of funds to compensate for
the deposit outflows.
 
     At December 31, 1993, the Bank maintained over $265 million in collateral,
at market value, which could be borrowed against or sold to offset any run-offs
which could occur in retail deposits in the current low interest rate
environment. The Bank considers this level of excess collateral to be adequate
and considers the likelihood of substantial run-offs occurring to be remote.
 
                                       16
<PAGE>   21
     The average balances in and average rates paid on deposit accounts for the
years indicated are summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                              1993                   1992                   1991
                                       -------------------    -------------------    -------------------
                                        BALANCE      YIELD     BALANCE      YIELD     BALANCE      YIELD
                                       ----------    -----    ----------    -----    ----------    -----
<S>                                    <C>           <C>      <C>           <C>      <C>           <C>
Noninterest-bearing demand
  deposits...........................  $   77,144      -- %   $   74,245      -- %   $   46,992      -- %
Interest-bearing demand deposits.....     329,785    2.60        279,793    3.19        241,738    5.40
Savings deposits.....................      83,935    2.81         71,548    2.49         62,245    5.20
Certificates of deposit..............     952,764    4.90      1,263,298    5.96      1,342,822    7.32
                                       ----------    -----    ----------    -----    ----------    -----
                                       $1,443,628    3.99 %   $1,688,884    5.09 %   $1,693,797    6.77 %
                                       ----------    -----    ----------    -----    ----------    -----
                                       ----------    -----    ----------    -----    ----------    -----
</TABLE>
 
     See Note 7 of the Notes to Consolidated Financial Statements for further
discussion.
 
     Certificates of deposit include approximately $152 million, $223 million
and $245 million in time certificates of deposits in amounts of $100,000 or more
at December 31, 1993, 1992 and 1991, respectively. The following table
represents time certificates of deposits, none of which are brokered, in amounts
of $100,000 or more by time remaining until maturity as of December 31, 1993
(thousands of dollars):
 
<TABLE>
<CAPTION>
LESS THAN     3 MONTHS-     6 MONTHS-     GREATER THAN
3 MONTHS      6 MONTHS       1 YEAR          1 YEAR
- ---------     ---------     ---------     ------------
<S>           <C>           <C>           <C>
 $46,275       $30,718       $22,676        $ 52,576
- ---------     ---------     ---------     ------------
- ---------     ---------     ---------     ------------
</TABLE>
 
BORROWINGS
 
     Sources of funds other than deposits have included advances from the FHLB,
reverse repurchase agreements and other borrowings.
 
     FHLB Advances.  As a member of the FHLB system, the Bank may obtain
advances from the FHLB pursuant to various credit programs offered from time to
time. The Bank borrows these funds from the FHLB principally on the security of
its FHLB capital stock and certain of its mortgage loans. See Regulation --
Federal Home Loan Bank System herein for additional discussion. Such advances
are made on a limited basis to supplement the Bank's supply of lendable funds,
to meet deposit withdrawal requirements and to lengthen the maturities of its
borrowings. See Note 11 of the Notes to Consolidated Financial Statements for
additional discussion.
 
     Securities Sold Under Repurchase Agreements.  The Bank sells securities
under agreements to repurchase (reverse repurchase agreements). Reverse
repurchase agreements involve the Bank's sale of debt securities to an
investment banking firm with a simultaneous agreement to repurchase the same
debt securities on a specified date at a specified price. The initial price paid
to the Bank under reverse repurchase agreements is less than the fair market
value of the debt securities sold, and the Bank may be required to pledge
additional collateral if the fair market value of the debt securities sold
declines below the price paid to the Bank for these debt securities. See Note 8
of the Notes to Consolidated Financial Statements for additional discussion of
the terms and description of the reverse repurchase agreements.
 
     Reverse repurchase agreements are summarized as follows (thousands of
dollars):
 
<TABLE>
<CAPTION>
                                                               1993         1992         1991
                                                             --------     --------     --------
<S>                                                          <C>          <C>          <C>
Balance at year-end........................................  $259,041     $376,859     $265,504
Accrued interest payable at year-end.......................     3,871        3,717        4,423
Daily average amount outstanding during year...............   305,123      204,222      246,071
Maximum amount outstanding at any month-end................   367,859      376,859      353,735
Weighted-average interest rate during the year.............      4.30%        5.98%        7.19%
Weighted-average interest rate on year-end balances........      4.31%        4.54%        6.44%
</TABLE>
 
     At December 31, 1993, the balance of reverse repurchase agreements included
$49 million in long-term fixed-rate flexible reverse repurchase agreements with
a weighted average interest rate of 8.62 percent.

                                       17
<PAGE>   22
 
EMPLOYEES
 
     At December 31, 1993 the Bank had 622 full-time equivalent employees. None
of the employees are represented by any union or collective bargaining group and
the Bank considers its relations with its employees to be good.
 
COMPETITION
 
     The Bank experiences substantial competition in attracting and retaining
deposit accounts and in making mortgage and other loans. The primary factors in
competing for deposit accounts are interest rates paid on deposits, the range of
financial services offered, the quality of service, convenience of office
locations and the financial strength of an institution. Direct competition for
deposit accounts comes from savings and loan associations, commercial banks,
money market mutual funds, credit unions and insurance companies. During 1993,
the Bank experienced deposit outflows from certificate of deposit accounts as
customers sought higher yielding alternative investments in this low interest
rate environment. The Bank has sought to retain relationships with these
customers by establishing an agreement with a third party broker to offer
uninsured investment alternatives in the Bank's branches.
 
     The primary factors in competing for loans are interest rates, loan
origination fees, quality of service and the range of lending services offered.
Competition for origination of first mortgage loans normally comes from savings
and loan associations, mortgage banking firms, commercial banks, insurance
companies, real estate investment trusts and other lending institutions.
 
PROPERTIES
 
     The Bank occupies facilities at 25 locations in Nevada, of which 12 are
owned. The Bank leases the remaining facilities. The Bank may add branches in
the future in order to achieve the deposit goals set forth in the Bank's Plan.
The Bank received approval from the Board of Directors to enter into
negotiations for four new branches (three in Las Vegas and one in Reno). During
1994, specific sites are expected to be identified. See Note 9 of the Notes to
Consolidated Financial Statements for a schedule of net future minimum rental
payments that have initial or remaining noncancelable lease terms in excess of
one year as of December 31, 1993.
 
REGULATION
 
  General
 
     In August 1989, FIRREA was enacted into law. FIRREA had and will continue
to have a significant impact on the thrift industry including, among other
things, imposing significantly higher capital requirements and providing funding
for the liquidation of insolvent thrifts. In December 1991, the Federal Deposit
Insurance Corporation Improvement Act of 1991 (FDICIA) was enacted into law.
This legislation included changes in the qualified thrift lender test, deposit
insurance assessments and capital standards.
 
     Regulatory Infrastructure. The Bank's principal supervisory agency is the
OTS, an agency reporting to the U.S. Treasury Department. The OTS is responsible
for the examination and regulation of all thrifts and for the organization,
incorporation, examination and regulation of federally chartered thrifts.
 
     The FDIC is the Bank's secondary regulator and is the administrator of the
SAIF which generally insures the deposits of thrifts.
 
     Deposit Insurance Premiums. During 1993, the FDIC implemented a risk-based
deposit insurance premium assessment. Under the regulation, annual deposit
insurance premiums ranging from 23 to 31 basis points are imposed on
institutions based upon the institution's level of capital and a supervisory
risk assessment. For the year ended December 31, 1993, the deposit insurance
premium was $3.7 million.
 
     Capital Standards. Effective December 1989, the OTS issued the minimum
regulatory capital regulations (capital regulations) required by FIRREA.
 
                                       18
<PAGE>   23
 
     The capital regulations require that all thrifts meet three separate
capital standards as follows:
 
          1. A tangible capital requirement equal to at least 1.5 percent of
     adjusted total assets (as defined).
 
          2. A core capital requirement equal to at least three percent of
     adjusted total assets (as defined).
 
          3. A risk-based capital requirement equal to at least eight percent of
     risk-weighted assets (as defined).
 
     The OTS may establish, on a case by case basis, individual minimum capital
requirements for a thrift institution which may vary from the requirements which
would otherwise be applicable under the capital regulations. The OTS has not
established such minimum capital requirements for the Bank.
 
     A thrift institution which fails to meet one or more of the applicable
capital requirements is subject to various regulatory limitations and sanctions,
including a prohibition on growth and the issuance of a capital directive by the
OTS requiring the following: an increase in capital, a reduction of rates paid
on savings accounts, cessation of or limitations on deposit taking and lending,
limitations on operational expenditures, an increase in liquidity, and such
other actions as are deemed necessary or appropriate by the OTS. In addition, a
conservator or receiver may be appointed under certain circumstances.
 
     FDICIA required the federal banking agencies to adopt regulations which
implemented a system of progressive constraints as capital levels decline at
banks and savings institutions. The federal banking agencies have enacted
uniform "prompt corrective action" rules which classifies banks and savings
institutions into one of five categories based upon capital adequacy, ranging
from "well capitalized" to "critically undercapitalized." As of December 31,
1993, the Bank is categorized as "well capitalized" under the regulation.
 
     FDICIA also requires the appropriate federal banking agencies to take
corrective action to restrict asset growth, acquisitions, branching and new
business with respect to an "undercapitalized" institution and to take
increasingly severe additional actions if the institution becomes "significantly
undercapitalized" or "critically undercapitalized." FDICIA also prohibits
dividends and other capital distributions and payment of management fees to a
controlled entity, if following such distribution or payment, the institution
would fall within one of the three "undercapitalized" categories. See Financial
Services Segment -- Financial and Regulatory Capital of MD&A for further
discussion.
 
     An institution that fails to meet the minimum level for any relevant
capital measure (an "undercapitalized institution") may be: (i) subject to
increased monitoring by the appropriate federal banking regulator; (ii) required
to submit an acceptable capital restoration plan within 45 days; (iii) subject
to asset growth limits; and (iv) required to obtain prior regulatory approval
for acquisitions, branching and new lines of businesses. The capital restoration
plan must include a guarantee by the institution's holding company that the
institution will comply with the plan until it has been adequately capitalized
on average for four consecutive quarters, under which the holding company would
be liable up to the lesser of five percent of the institution's total assets or
the amount necessary to bring the institution into capital compliance as of the
date it failed to comply with its capital restoration plan. A significantly
undercapitalized institution, as well as any undercapitalized institution that
does not submit an acceptable capital restoration plan, may be subject to
regulatory demands for recapitalization, broader application of restrictions on
transactions with affiliates, limitations on interest rates paid on deposits,
asset growth and other activities, possible replacement of directors and
officers, and restrictions on capital distributions by any bank holding company
controlling the institution. Any company controlling the institution may also be
required to divest the institution. If an institution's ratio of tangible
capital to total assets falls below a level established by the appropriate
federal banking regulator, the institution will be subject to conservatorship or
receivership within 90 days unless periodic determinations are made that
forbearance from such action would better protect the deposit insurance fund.
Unless appropriate findings and certifications are made by the appropriate
federal regulatory agencies, a critically undercapitalized institution must be
placed in receivership if it remains critically undercapitalized on average
during the calendar quarter beginning 270 days after the date it became
critically undercapitalized. These new capital requirements and applicable
banking regulations became effective in December 1992.
 
                                       19
<PAGE>   24
 
     FDICIA also amends the grounds for appointment of a conservator or receiver
for an insured depository institution to include the following events: (i)
consent by the board of directors of the institution; (ii) cessation of the
institution's status as an insured depository institution; (iii) the institution
is undercapitalized and has no reasonable prospect of becoming adequately
capitalized when required to do so, fails to submit an acceptable capital plan
or materially fails to implement an acceptable capital plan and (iv) the
institution is critically undercapitalized or otherwise has substantially
insufficient capital.
 
     FDIC imposed regulations provide that any insured institution which falls
below a two percent minimum level ratio will be subject to FDIC deposit
insurance termination proceedings unless it has submitted, and is in compliance
with, a capital plan with its primary federal regulator and the FDIC.
Additionally, an insured institution may be subject to deposit insurance
termination proceedings, under certain circumstances, even if it meets or
exceeds the two percent minimum level ratio requirement.
 
     In January 1993, the OTS issued a Thrift Bulletin limiting the amount of
deferred tax assets that can be used to meet capital requirements. Under the
bulletin, for purposes of calculating regulatory capital, net deferred tax
assets are limited to the amount which could be theoretically realized from
carryback potential plus the lesser of the tax on one year's projected earnings
or ten percent of core capital. Transitional provisions apply to deferred tax
assets existing at December 31, 1992 which are not subject to the limitation.
 
     At December 31, 1993 the Bank has recorded a net deferred tax liability
and, therefore, is not subject to the regulation at this time. Management does
not anticipate this regulation will impact the Bank's compliance with capital
standards in the foreseeable future.
 
     The capital regulations specify that only the following elements may be
included in tangible capital: stockholder's equity, noncumulative perpetual
preferred stock, retained earnings and minority interests in the equity accounts
of fully consolidated subsidiaries. Further, goodwill and investments in and
loans to subsidiaries engaged in activities not permitted of national banks must
be deducted from assets and capital. See Regulation -- General -- Separate
Capitalization of Nonpermissible Activities herein for additional discussion.
 
     In calculating adjusted total assets under the capital regulations, certain
adjustments are made to total assets to give effect to the exclusion of certain
assets from tangible capital and to appropriately account for the investments in
and assets of both includable and nonincludable activities.
 
     Core capital under the current regulations may include only tangible
capital, plus certain intangible assets up to a limit of 25 percent of core
capital, provided such assets are: (i) separable from the thrift's assets; (ii)
valued at an established market value through an identifiable stream of cash
flows with a high degree of certainty that the asset will hold this market value
notwithstanding the prospects of the thrift and (iii) salable in a market that
is liquid. In addition, certain qualifying "supervisory" goodwill is includable
as core capital as follows:
 
<TABLE>
<CAPTION>
                                                                 THE APPLICABLE INCLUSION
                                                                    AS A PERCENTAGE OF
                            FOR THE PERIOD                       ADJUSTED TOTAL ASSETS IS
        -------------------------------------------------------  ------------------------
        <S>                                                      <C>
        Prior to January 1, 1992...............................            1.500%
        January 1, 1992 - December 31, 1992....................            1.000
        January 1, 1993 - December 31, 1993....................            0.750
        January 1, 1994 - December 31, 1994....................            0.375
        Thereafter.............................................            0.000
</TABLE>
 
     At December 31, 1993 and 1992, $27 million and $28.8 million, respectively,
of the Bank's goodwill qualified as supervisory goodwill. At December 31, 1993,
$12.6 million of supervisory goodwill was includable in core capital. Due to the
0.375 percent limitation, on January 1, 1994 only $6.3 million of the Bank's
supervisory goodwill was includable in core capital.
 
     Regarding the risk-based capital requirement, under the capital
regulations, assets are assigned to one of four "risk-weighted" categories (zero
percent, 20 percent, 50 percent or 100 percent) based upon the degree
 
                                       20
<PAGE>   25
 
of perceived risk associated with the asset. The total amount of a thrift's
risk-weighted assets is determined by multiplying the amount of each of its
assets by the risk weight assigned to it, and totaling the resulting amounts.
 
     The capital regulation also establishes the concept of "total capital" for
the risk-based capital requirement. As defined, total capital consists of core
capital and supplementary capital. Supplementary capital includes: (i) permanent
capital instruments such as cumulative perpetual preferred stock, perpetual
subordinated debt and mandatory convertible subordinated debt (capital notes),
(ii) maturing capital instruments such as subordinated debt, intermediate-term
preferred stock, mandatory convertible subordinated debt (commitment notes) and
mandatory redeemable preferred stock, subject to an amortization schedule and
(iii) general valuation loan and lease loss allowances up to 1.25 percent of
risk-weighted assets.
 
     The OTS has issued a regulation which adds a component to an institution's
risk-based capital calculation in 1994. The regulation will require a reduction
of an institution's risk-based capital by 50 percent of the decline in the
institution's net portfolio value (NPV) exceeding two percent of assets under a
hypothetical 200 basis point increase or decrease in market interest rates.
Based upon management's estimate of its interest rate risk (IRR) exposure, and
using data as of December 31, 1993, the Bank will not be subjected to a
reduction of its risk-based capital requirement because the hypothetical change
in the Bank's NPV is less than two percent of the estimated market value of the
Bank's assets.
 
     In order to strengthen the Bank's regulatory capital ratios, the Bank
undertook numerous actions in 1993 and 1992. See Financial Services
Segment -- Capital Resources and Liquidity of MD&A and Note 2 of the Notes to
Consolidated Financial Statements for the calculation of the Bank's tangible
capital, core capital and risk-based capital and related excesses as of December
31, 1993 and 1992, and a discussion of the proposed changes in capital
requirements.
 
     Separate Capitalization of Nonpermissible Activities. For purposes of
determining a thrift's capital under all three capital requirements, its entire
investment in and loans to any subsidiary engaged in an activity not permissible
for a national bank must be deducted from the capital of the thrift. The capital
regulations provide for a transition period with respect to this provision.
During the transition period, a thrift is permitted to include in its
calculation the applicable percentage (as provided below) of the lesser of the
thrift's investments in and loans to such subsidiaries on: (i) April 12, 1989 or
(ii) the date on which the thrift's capital is being determined, unless the FDIC
determines with respect to any particular thrift that a lesser percentage should
be applied in the interest of safety and soundness.
 
     In July 1992, legislation was enacted which delayed the increased
transitional deduction from capital for real estate investments, and allowed
thrifts to apply to the OTS for use of a delayed schedule. The Bank applied for
and received approval for use of the following delayed phase-out schedule:
 
<TABLE>
<CAPTION>
                             FOR THE PERIOD                        DEDUCTION FROM CAPITAL
        ---------------------------------------------------------  ----------------------
        <S>                                                        <C>
        Prior to July 1, 1994....................................             25%
        July 1, 1994 to June 30, 1995............................             40
        July 1, 1995 to June 30, 1996............................             60
        Thereafter...............................................            100
</TABLE>
 
     As of December 31, 1993, the Bank had $5.5 million in investments in and
loans to nonpermissible activities which fall under this section of FIRREA, all
of which are grandfathered according to the phase-out schedule outlined above.
Included in this amount are investments in real estate, land loans and certain
foreclosed real estate.
 
     At December 31, 1993, under fully phased-in capital rules applicable to the
Bank at July 1, 1996, the Bank would have exceeded its fully phased-in tangible,
core and risk-based capital requirements by $81.8 million, $56.6 million, and
$43.1 million, respectively. See Financial Services Segment -- Financial and
Regulatory Capital of MD&A for further discussion.
 
     Lending Activities. FIRREA limits the amount of commercial real estate
loans that a federally chartered thrift may make to four times its capital (as
defined). Based on core capital of $120 million at December 31,
 
                                       21
<PAGE>   26
 
1993, the Bank's commercial real estate lending limit was $480 million. At
December 31, 1993, the Bank had $192 million invested in commercial real estate
loans; therefore, this limitation should not unduly restrict the Bank's ability
to engage in commercial real estate loans.
 
     FIRREA conformed thrifts' loans-to-one-borrower limitations to those
applicable to national banks. After December 31, 1991 thrifts generally are not
permitted to make loans to a single borrower in excess of 15 percent to 25
percent of the thrift's unimpaired capital and unimpaired surplus (depending
upon whether the loan is collateralized and the type of collateral), except that
a thrift may make loans-to-one-borrower in excess of such limits under one of
the following circumstances: (i) for any purpose, in any amount not to exceed
$500,000 and (ii) to develop domestic residential housing units, in an amount
not to exceed the lesser of $30 million, or 30 percent, of the thrift's
unimpaired capital and unimpaired surplus, provided the thrift meets fully
phased-in capital requirements and certain other conditions are satisfied. The
Bank's loans-to-one-borrower limitation was $17.6 million at December 31, 1993.
This limitation is not expected to materially affect the operations of the Bank.
At December 31, 1993 the Bank was in compliance with the limitation.
 
     In December 1992, the OTS issued a regulation regarding real estate lending
standards, as mandated by FDICIA, which became effective in March 1993. The
regulation requires insured depository institutions to adopt and maintain
comprehensive written real estate lending policies which include prudent
underwriting standards, loan administration procedures, portfolio
diversification standards, and documentation, approval and reporting
requirements. The policies must be reviewed and approved annually to ensure
appropriateness for current market conditions. The regulation also provides
supervisory loan-to-value limits for various types of real estate based loans.
Loans may be originated in excess of these limitations up to a maximum of 100
percent of total regulatory capital. Management does not anticipate that the
regulation will have a material impact on the Bank's lending operations.
 
     In August 1993, the OTS issued revised guidance for the classification of
assets and a new policy on the classification of collateral-dependent loans
(where proceeds from repayment can be expected to come only from the operation
and sale of the collateral). With limited exceptions, effective September 1993,
for troubled collateral-dependent loans where it is probably that the lender
will be unable to collect all amounts due, an institution must classify as
"loss" any excess of the recorded investment in the loan over its "value," and
classify the remainder as "substandard." The "value" of a loan is either the
present value of the expected future cash flows, the loan's observable market
price or the fair value of the collateral. The Bank does not anticipate any
adverse impact from the implementation of the revised guidance for
classification of assets or collateral-dependent loans.
 
     The federal agencies regulating financial institutions issued a joint
policy statement in December 1993 providing quantitative guidance and
qualitative factors to consider in determining the appropriate level of general
valuation allowances that institutions should maintain against various asset
portfolios. The policy statement also requires institutions to maintain
effective asset review systems and to document the institution's process for
evaluating and determining the level of its general valuation allowance.
Management believes the Bank's current policies and procedures regarding general
valuation allowances and asset review procedures are consistent with the policy
statement.
 
     FDICIA amended the Qualified Thrift Lender (QTL) test prescribed by FIRREA
by reducing the qualified percentage to 65 percent and adding certain
investments as qualifying investments. A savings institution must meet the
percentage in at least nine of every 12 months. At December 31, 1993, the Bank's
QTL ratio was approximately 79 percent. A thrift that fails to meet the QTL test
must either become a commercial bank or be subject to a series of restrictions.
 
     Deposit Activities.  FDIC rules permit well capitalized institutions to
obtain brokered deposits in most circumstances. Adequately capitalized
institutions may obtain brokered deposits only if they obtain a waiver from the
FDIC. Undercapitalized institutions are prohibited from accepting brokered
deposits. The Bank is classified as well capitalized for purposes of this rule.
The Bank does not anticipate that there will be any impact on its business
operations or deposit pricing as a result of this rule because the Bank is not
currently accepting new brokered deposits and does not anticipate soliciting
brokered deposits or deposits at rates significantly higher than prevailing
rates.
 
                                       22
<PAGE>   27
 
     Supervisory Restrictions.  In October 1991, the Bank entered into a
Supervisory Agreement (the Agreement) with the OTS. Among other things, the Bank
agreed to: retain competent management, improve the review and monitoring of
problem assets, develop comprehensive business plans which support decisions
concerning real estate development projects and foreclosed real estate, and
reduce interest rate risk. In November 1993, the Agreement was terminated based
upon corrective actions taken by the Bank.
 
     Safety and Soundness Standards.  Pursuant to statutory requirements, the
OTS issued a proposed rule on November 17, 1993, that prescribes certain "safety
and soundness standards." The standards are intended to enable the OTS to
address problems at savings associations before the problems cause significant
deterioration in the financial condition of the association. The proposed
regulation provides operational and managerial standards for internal controls
and information systems, loan documentation, internal audit systems, credit
underwriting, interest rate exposure, asset growth, and compensation, fees and
benefits. The proposed regulation also requires a savings association to
maintain a ratio of classified assets to total capital and ineligible allowances
that is no greater than 1.0. A minimum earnings standard is also included in the
proposed regulation requiring earnings sufficient to absorb losses without
impairing capital. Earnings would be sufficient under the proposed regulation if
the institution meets applicable capital requirements and would remain in
capital compliance if its net income or loss over the last four quarters of
earnings continued over the next four quarters of earnings. An institution that
fails to meet any of the standards must submit a compliance plan. Failure to
submit an acceptable compliance plan or to implement the plan could result in an
OTS order or other enforcement action against the association. The Bank's level
of adversely classified assets is less than its total capital plus ineligible
allowances at December 31, 1993 as defined under the proposed rule.
 
  Federal Home Loan Bank System
 
     The FHLB system consists of 12 regional FHLB banks, which provide a central
credit facility primarily for member institutions. The Bank, as a member of the
FHLB of San Francisco, is required to own capital stock in that institution in
an amount at least equal to: one percent of the aggregate outstanding balance at
the beginning of the year of its outstanding residential mortgage loans, home
purchase contracts and similar obligations; 0.3 percent of total assets; or five
percent of its advances from the FHLB, whichever is greater. The Bank is in
compliance with this requirement, with an investment in FHLB stock at December
31, 1993 of $16.5 million.
 
  Liquidity
 
     The Bank is required to maintain an average daily balance of liquid assets
equal to at least five percent of its liquidity base (as defined in the
Regulation) during the preceding calendar month. The Bank is also required to
maintain an average daily balance of short-term liquid assets equal to at least
one percent of its liquidity base. The Bank has complied with these regulatory
requirements. For the month of December 1993, the Bank's liquidity ratios were
18 percent and ten percent, respectively. See Financial Services Segment --
Capital Resources and Liquidity of MD&A for additional discussion.
 
  Investments
 
     In December 1991, the Federal Financial Institutions Examinations Council
(FFIEC) issued its Supervisory Policy Statement on Securities Activities (Policy
Statement). The Policy Statement: (1) addresses the selection of securities
dealers, (2) requires depository institutions to establish prudent policies and
strategies for securities transactions, (3) defines securities trading or sales
practices that are viewed by the agencies as being unsuitable when conducted in
an investment portfolio, (4) indicates characteristics of loans held for sale or
trading, and (5) establishes a framework for identifying when certain mortgage
derivative products are high-risk mortgage securities which must be held either
in a trading or held for sale account. Management believes that items (1)
through (4) will not unduly restrict the present operating strategies of the
Bank. Item (5) will not affect the Bank's treatment of its $5 million investment
in CMO residuals since the Policy Statement includes a grandfathering provision
whereby any mortgage derivative owned prior to the date of adoption by the OTS
is exempt from the tests. However, the Bank will have to apply the specified
tests
 
                                       23
<PAGE>   28
 
to any mortgage derivative product, including CMO, Real Estate Mortgage
Investment Conduits (REMIC), CMO and REMIC residuals and stripped MBS purchases
in the future.
 
  Insurance of Deposits
 
     The Bank's deposits are insured by the FDIC through the SAIF up to the
maximum amount permitted by law, currently $100,000 per insured depositor. The
SAIF requires semiannual insurance premium payments in January and July of each
year. See Regulation -- General -- Deposit Insurance Premiums herein for
additional discussion of insurance premiums to be paid by SAIF members.
 
     Insurance of deposits may be terminated by the FDIC, after notice and
hearing, upon a finding by the FDIC that a thrift has engaged in unsafe or
unsound practices, or is in an unsafe or unsound condition to continue
operations, or has violated any applicable law, regulation, rule, order or
condition imposed by the OTS and FDIC. Management of the Bank is not aware of
any practice, condition, or violation that might lead to termination of its
deposit insurance.
 
  Community Reinvestment Act
 
     The Community Reinvestment Act of 1977 (CRA) and regulations promulgated
under the act encourage savings associations to help meet the credit needs of
the communities they do business in, particularly the credit needs of low and
moderate income neighborhoods. The OTS periodically evaluates the Bank's
performance under CRA. This evaluation is taken into account in determining
whether to grant approval for new branches, relocations, mergers, acquisitions
and dispositions. The Bank received a "satisfactory" evaluation in its most
recent examination.
 
  Federal Reserve System
 
     The Board of Governors of the Federal Reserve System (the Federal Reserve)
has adopted regulations that require depository institutions to maintain
noninterest earning reserves against their transaction accounts (primarily
negotiable order of withdrawal (NOW), demand deposit accounts, and Super NOW
accounts) and nonpersonal money market deposit accounts. These regulations
generally require that reserves of three percent be maintained against aggregate
transaction accounts in an institution, up to $47.9 million, and an initial
reserve of ten percent be maintained against that portion of total transaction
accounts in excess of such amount. In addition, an initial reserve of three
percent must be maintained on nonpersonal money market deposit accounts (which
include borrowings with maturities of less than four years). These accounts and
percentages are subject to adjustment by the Federal Reserve. The balances
maintained to meet the reserve requirements imposed by the Federal Reserve may
be used to satisfy liquidity requirements which may be imposed by the OTS. At
December 31, 1993, the Bank was required to maintain approximately $1.8 million
in noninterest earning reserves and was in compliance with this requirement.
 
     As a creditor and financial institution, the Bank is subject to additional
regulations promulgated by the Federal Reserve, including, without limitation,
Regulation B (Equal Credit Opportunity Act), Regulation E (Electronics Funds
Transfers Act), Regulation F (Interbank Liabilities), Regulation Z (Truth in
Lending Act), Regulation CC (Expedited Funds Availability Act) and Regulation DD
(Truth in Savings Act).
 
                                       24
<PAGE>   29
 
                            HOLDING COMPANY MATTERS
 
     The Bank is a wholly owned subsidiary of the Company. As a unitary savings
bank holding company, the Company is subject to certain OTS regulation,
examination, supervision and reporting requirements. The Bank is generally
prohibited from engaging in certain transactions with the Company and is subject
to certain OTS restrictions on the payment of dividends to the Company.
 
     In 1990, the OTS issued a regulation governing limitations of capital
distributions, including dividends. Under the regulation, a tiered system keyed
to capital is imposed on capital distributions. Insured thrifts fall under one
of three tiers.
 
     1.  Tier 1 includes those thrifts with net capital exceeding fully
         phased-in requirements and with Management, Asset quality, Capital
         adequacy, Risk management and Operating results (MACRO) ratings of 1 or
         2. (The MACRO system was established by the OTS to comprehensively and
         uniformly grade all thrifts with regard to financial condition,
         compliance with laws and regulations, and overall operating soundness.)
 
     2.  Tier 2 includes those thrifts having net capital above their regulatory
         capital requirement, but below the fully phased-in requirement.
 
     3.  Tier 3 includes those thrifts with net capital below the current
         regulatory requirement.
 
     Under the regulation, insured thrifts are permitted to make dividend
payments as follows:
 
     1.  Tier 1 thrifts are permitted to make (without application but with
         notification) capital distributions of half their surplus capital (as
         defined) at the beginning of a calendar year plus 100 percent of their
         earnings to date for the year.
 
     2.  Tier 2 thrifts can make (without application but with notification)
         capital distributions ranging from 25, 50 or 75 percent of their net
         income over the most recent four quarter period, depending upon their
         level of capital in relation to the fully phased-in requirements.
 
     3.  Tier 3 thrifts are prohibited from making any capital distributions
         without prior supervisory approval.
 
     Based upon these regulations, the Bank is currently restricted to paying no
more than 75 percent of its net income over the last four quarters in dividends
to its parent. The Bank did not pay any cash dividends during the past three
years and does not anticipate paying cash dividends to its parent during 1994.
 
     Generally transactions between a savings and loan association and its
affiliates are required to be on terms as favorable to the association as
comparable transactions with nonaffiliates. In addition, certain of these
transactions are restricted to a percentage of the association's capital.
Affiliates of the Bank include the Company. In addition, a savings and loan
association may not lend to any affiliate engaged in activities not permissible
for a bank holding company or acquire the securities of such affiliates. It is
not permissible for bank holding companies to operate a gas utility. Therefore,
all loans by the Bank to the Company and all purchases of the Company's
securities by the Bank are prohibited.
 
     The Company, at the time that it acquired the Bank, agreed to assist the
Bank in maintaining levels of net worth required by the regulations in effect at
the time or as they were thereafter in effect so long as it controlled the Bank.
The enforceability of a net worth maintenance agreement of this type is
uncertain. However, under current regulations, a holding company that has
executed a capital maintenance obligation of this type may not divest control of
a thrift, if the thrift has a capital deficiency, unless the holding company
either provides the OTS with an agreement to infuse sufficient capital into the
thrift to remedy the deficiency or the deficiency is satisfied.
 
     The Company is prohibited from issuing any bond, note, lien, guarantee or
indebtedness of any kind pledging its utility assets or credit for or on behalf
of a subsidiary which is not engaged in or does not support the business of the
regulated public utility. As a result, there are limitations on the Company's
ability to assist the Bank in maintaining levels of capital required by
applicable regulations.
 
                                       25
<PAGE>   30
 
     The Company also stipulated in connection with the acquisition of the Bank
that dividends by the Bank to the Company would not exceed 50 percent of the
Bank's cumulative net income after the date of acquisition, without approval of
the regulators. In addition, the Company agreed that the Bank would not at any
time declare a dividend that would reduce the Bank's regulatory net worth below
minimum regulatory requirements as in effect at the time of the acquisition or
thereafter. Since the acquisition, the Bank's cumulative net income is $29.5
million resulting in maximum dividends payable of $14.7 million as of December
31, 1993. Since the acquisition, the Bank has paid the Company $1.8 million in
capital distributions, net of the $20 million of capital contributions received
from the Company.
 
ITEM 2.  PROPERTIES
 
     The information appearing in Part I, Item 1, pages 2 and 18 in this report
is incorporated herein by reference.
 
ITEM 3.  LEGAL PROCEEDINGS
 
     The Company has been involved with several lawsuits related to the May 4,
1988 fire and explosion at the Pacific Engineering & Production Company of
Nevada (PEPCON) rocket fuel oxidizer plant in Henderson, Nevada. The lawsuits
related to this incident, some of which named the Company as one of the
defendants, were consolidated in the District Court for Clark County, Nevada
under Case No. A264974. All claims have been settled by the various defendants.
On December 14, 1992, a jury returned a verdict in favor of the Company on the
PEPCON insurer's subrogation claim and the Court thereafter entered judgement in
favor of the Company. During 1993, the Company's motions on behalf of its
insurers to recover its costs and attorneys' fees resulted in a recovery of $1.6
million through a negotiated settlement. The settlement also resulted in the
dismissal by the Nevada Supreme Court of two insurance companies' subrogation
claims which were on appeal.
 
ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
     None.
 
                                    PART II
 
ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED
         STOCKHOLDER MATTERS
 
     The principal market in which the common stock of the Company is traded is
the New York Stock Exchange. At March 18, 1994, there were 21,681 holders of
record of common stock. The market price of the common stock was $17.13 as of
March 18, 1994. Prices shown are those as quoted by the Wall Street Journal.
 
                  COMMON STOCK PRICE AND DIVIDEND INFORMATION
 
<TABLE>
<CAPTION>
                                               1993                  1992            DIVIDENDS PAID
                                         -----------------     -----------------     ---------------
                                          HIGH       LOW        HIGH       LOW       1993      1992
                                         ------     ------     ------     ------     -----     -----
<S>                                      <C>        <C>        <C>        <C>        <C>       <C>
Fiscal Quarter
  First................................  $17.88      13.38     $13.50      10.38     $.175     $.175
  Second...............................   18.50      16.75      14.63      12.63      .175      .175
  Third................................   17.38      16.13      15.38      13.00      .195      .175
  Fourth...............................   18.50      15.50      14.50      12.88      .195      .175
                                                                                     -----     -----
                                                                                     $.740     $.700
                                                                                     -----     -----
                                                                                     -----     -----
</TABLE>
 
     See Holding Company Matters and Note 2 of the Notes to Consolidated
Financial Statements for a discussion of limitations on the Bank's ability to
make capital distributions to the Company.
 
                                       26
<PAGE>   31
 
ITEM 6.  SELECTED FINANCIAL DATA
 
                   CONSOLIDATED SELECTED FINANCIAL STATISTICS
 
                (THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                    YEAR ENDED DECEMBER 31,
                                                 --------------------------------------------------------------
                                                    1993         1992         1991         1990         1989
                                                 ----------   ----------   ----------   ----------   ----------
<S>                                              <C>          <C>          <C>          <C>          <C>
Operating revenues.............................  $  689,841   $  718,483   $  794,791   $  867,671   $  846,676
Operating expenses.............................     602,263      642,635      765,688      761,244      734,436
                                                 ----------   ----------   ----------   ----------   ----------
Operating income...............................      87,578       75,848       29,103      106,427      112,240
Other income and (expenses)....................     (14,252)        (599)       1,824        1,808          922
Net interest and amortization of debt discount
  and expenses.................................     (49,706)     (43,115)     (44,461)     (45,441)     (41,969)
                                                 ----------   ----------   ----------   ----------   ----------
Income (loss) before income taxes..............      23,620       32,134      (13,534)      62,794       71,193
Income taxes...................................      11,259       14,473          641       25,623       28,508
                                                 ----------   ----------   ----------   ----------   ----------
Net income (loss) before cumulative effect of
  accounting change............................      12,361       17,661      (14,175)      37,171       42,685
Cumulative effect of change in method of
  accounting...................................       3,045           --           --           --           --
                                                 ----------   ----------   ----------   ----------   ----------
Net income (loss)..............................  $   15,406   $   17,661   $  (14,175) $     37,171  $   42,685
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Net income (loss) applicable to common stock...  $   14,665   $   16,610   $  (15,500)  $   35,576   $   40,910
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Contribution to consolidated net income (loss)
  Gas operations...............................  $   13,751   $   32,214   $   18,291   $   30,981   $   32,425
  Financial services...........................       1,655      (14,553)     (32,466)       6,190       10,260
                                                 ----------   ----------   ----------   ----------   ----------
                                                 $   15,406   $   17,661   $  (14,175)  $   37,171   $   42,685
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Total assets at year end.......................  $2,943,949   $3,341,528   $3,462,974   $3,764,260   $3,724,846
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Construction expenditures......................  $  115,424   $  105,595   $   81,063   $  104,419   $   99,471
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Cash flow, net
  From operating activities....................  $   89,491   $   86,441   $  112,958   $   73,985   $   77,404
  From investing activities....................     343,823       36,045      219,715      (33,502)     (54,984)
  From financing activities....................    (444,613)    (102,560)    (290,353)     (29,948)     (31,447)
                                                 ----------   ----------   ----------   ----------   ----------
  Net change in cash...........................  $  (11,299)  $   19,926   $   42,320   $   10,535   $   (9,027)
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Capitalization at year end
  Common equity................................  $  343,878   $  329,444   $  327,149   $  353,254   $  334,215
  Preferred and preference stocks..............       8,058       15,316       22,574       29,832       37,090
  Long-term debt...............................     692,865      654,523      674,330      842,572      844,633
                                                 ----------   ----------   ----------   ----------   ----------
                                                 $1,044,801   $  999,283   $1,024,053   $1,225,658   $1,215,938
                                                 ----------   ----------   ----------   ----------   ----------
                                                 ----------   ----------   ----------   ----------   ----------
Common stock data
  Return on average common equity..............         4.4%         5.1%        (4.6)%       10.3%        12.7%
  Earnings (loss) per share....................  $     0.71   $     0.81   $    (0.76)  $     1.81   $     2.15
  Dividends paid per share.....................  $     0.74   $     0.70   $     1.05   $     1.40   $     1.37
  Payout ratio.................................         104%          86%         N/A           77%          64%
  Book value per share at year end.............  $    16.38   $    15.99   $    15.88   $    17.63   $    17.30
  Market value per share at year end...........  $    16.00   $    13.75   $    10.63   $    13.13   $    17.25
  Market value per share to book value per
    share......................................          98%          86%          67%          74%         100%
  Common shares outstanding at year end
    (000)......................................      20,997       20,598       20,598       20,036       19,322
  Number of common shareholders at year end....      21,851       22,943       24,396       24,510       24,400
</TABLE>
 
                                       27
<PAGE>   32
 
                                  SEGMENT DATA
 
                             NATURAL GAS OPERATIONS
 
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                          YEAR ENDED DECEMBER 31,
                                       --------------------------------------------------------------
                                          1993         1992         1991         1990         1989
                                       ----------   ----------   ----------   ----------   ----------
<S>                                    <C>          <C>          <C>          <C>          <C>
Sales...............................   $  503,789   $  506,937   $  493,647   $  503,961   $  475,828
Transportation......................       34,361       27,190       21,201       15,008       20,865
Other...............................          955          263       50,162       69,973       72,914
                                       ----------   ----------   ----------   ----------   ----------
Total revenue.......................      539,105      534,390      565,010      588,942      569,607
Net cost of gas purchased...........      212,290      214,293      276,954      294,597      289,346
                                       ----------   ----------   ----------   ----------   ----------
Operating margin....................      326,815      320,097      288,056      294,345      280,261
Expenses
  Operations and maintenance........      169,921      159,954      154,370      144,809      137,112
  Depreciation and amortization.....       55,088       52,277       47,140       43,979       38,666
  Other.............................       24,124       22,291       20,289       19,246       16,098
                                       ----------   ----------   ----------   ----------   ----------
Operating income....................   $   77,682   $   85,575   $   66,257   $   86,311   $   88,385
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Contribution to consolidated net
  income............................   $   13,751   $   32,214   $   18,291   $   30,981   $   32,425
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Total assets at year end............   $1,194,679   $1,103,794   $1,106,917   $1,051,698   $  951,288
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Net gas plant at year end...........   $  954,488   $  906,420   $  854,254   $  806,960   $  772,080
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Construction expenditures...........   $  113,903   $  102,517   $   76,871   $   99,634   $   92,885
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Cash flow, net
  From operating activities.........   $   50,628   $   81,457   $   93,925   $   55,188   $   76,007
  From investing activities.........     (116,246)    (103,065)     (96,588)     (91,527)     (85,572)
  From financing activities.........       67,297       (7,792)      27,351       39,363        9,993
                                       ----------   ----------   ----------   ----------   ----------
Net change in cash..................   $    1,679   $  (29,400)  $   24,688   $    3,024   $      428
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Total throughput (thousands of
  therms)
  Sales.............................      850,557      825,521      885,255      908,836      912,935
  Transportation....................      725,023      651,141      509,478      459,303      420,229
                                       ----------   ----------   ----------   ----------   ----------
  Total throughput..................    1,575,580    1,476,662    1,394,733    1,368,139    1,333,164
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Weighted average cost of gas
  purchased ($/therm)...............   $     0.29   $     0.26   $     0.26   $     0.26   $     0.26
Customers at year end...............      932,000      897,000      870,000      828,000      797,000
Employees at year end...............        2,318        2,285        2,243        2,217        2,250
Degree days -- actual...............        2,470        2,261        2,470        2,448        2,239
Degree days -- ten year average.....        2,401        2,375        2,419        2,356        2,334
</TABLE>
 
                                       28
<PAGE>   33
 
                                  SEGMENT DATA
 
                               FINANCIAL SERVICES
 
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                          YEAR ENDED DECEMBER 31,
                                       --------------------------------------------------------------
                                          1993         1992         1991         1990         1989
                                       ----------   ----------   ----------   ----------   ----------
<S>                                    <C>          <C>          <C>          <C>          <C>
Interest income......................  $  132,325   $  165,678   $  213,991   $  255,907   $  246,125
Interest expense.....................      75,076      111,917      158,788      208,236      213,007
                                       ----------   ----------   ----------   ----------   ----------
Net interest income..................      57,249       53,761       55,203       47,671       33,118
Provision for credit losses..........      (6,212)     (14,129)     (12,058)      (3,269)      (1,723)
                                       ----------   ----------   ----------   ----------   ----------
Net interest income after credit loss
  provision..........................      51,037       39,632       43,145       44,402       31,395
Income from real estate operations...         100        3,023          219       10,176       23,321
Provision for estimated real estate
  losses.............................      (1,010)     (18,309)     (50,696)      (4,500)      (2,106)
                                       ----------   ----------   ----------   ----------   ----------
Net income (loss) from real estate
  operations.........................        (910)     (15,286)     (50,477)       5,676       21,215
Loan fees............................       1,025        2,280        3,428        3,164        2,613
Other income, net....................      11,024       13,112       12,143        9,482        5,010
General and administrative
  expenses...........................     (48,296)     (45,309)     (41,237)     (38,452)     (32,182)
Amortization of cost in excess of
  net assets acquired................      (3,984)      (4,156)      (4,156)      (4,156)      (4,196)
                                       ----------   ----------   ----------   ----------   ----------
Operating income (loss)..............  $    9,896   $   (9,727)  $  (37,154)  $   20,116   $   23,855
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Contribution to consolidated
  net income (loss)..................  $    1,655   $  (14,553)  $  (32,466)  $    6,190   $   10,260
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Total assets at year end.............  $1,751,419   $2,237,734   $2,356,057   $2,712,562   $2,773,558
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Interest-earning assets at year
  end................................  $1,582,720   $2,022,121   $2,152,494   $2,450,629   $2,471,437
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Interest-bearing liabilities at year
  end................................  $1,546,158   $2,058,663   $2,164,402   $2,494,111   $2,567,288
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Cash flow, net
  From operating activities..........  $   38,863   $    4,984   $   19,033   $   18,797   $    1,397
  From investing activities..........     460,069      139,110      316,303       58,025       30,588
  From financing activities..........    (511,910)     (94,768)    (317,704)     (69,311)     (41,440)
                                       ----------   ----------   ----------   ----------   ----------
  Net change in cash.................  $  (12,978)  $   49,326   $   17,632   $    7,511   $   (9,455)
                                       ----------   ----------   ----------   ----------   ----------
                                       ----------   ----------   ----------   ----------   ----------
Average yield on loans...............        9.25%       10.14%       10.95%       11.06%       10.85%
Average yield on debt securities.....        5.93         7.15         8.74         9.05         8.99
Average yield on cash equivalents....        3.09         3.54         5.60         4.81         3.98
Average earning asset yield..........        7.28         8.32         9.56        10.02         9.64
Average cost of deposits.............        3.99         5.09         6.77         7.74         7.78
Average cost of borrowings...........        4.69         6.95         7.35         8.71         9.33
Average cost of funds (net of
  capitalized and transferred
  interest and cost of
  hedging activities)................        4.14         5.58         7.03         7.89         8.25
Interest rate spread.................        3.14         2.74         2.53         2.13         1.39
Net yield on interest-earning
  assets.............................        3.15         2.70         2.47         1.87         1.30
</TABLE>
 
                                       29
<PAGE>   34
 
ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS
 
     The Company is comprised of two business segments; natural gas operations
and financial services. The gas segment purchases, transports and distributes
natural gas to residential, commercial and industrial customers in
geographically diverse portions of Arizona, Nevada and California. The financial
services segment (the Bank) is engaged in retail and commercial banking. The
Bank's principal business is to attract deposits from the general public and
make consumer and commercial loans secured by real estate and other collateral.
During 1993, the gas segment contributed $13.7 million and the financial
services segment contributed $1.7 million towards consolidated net income of
$15.4 million.
 
CONSOLIDATED CAPITAL RESOURCES AND LIQUIDITY
 
     The capital requirements and resources of the Company generally are
determined independently for the gas and financial services segments. Each
business segment is generally responsible for securing its own financing
sources.
 
     Liquidity refers to the ability of an enterprise to generate adequate
amounts of cash to meet its cash requirements. General factors that could affect
consolidated capital resources and liquidity significantly in future years
include inflation, growth in the economy and changes in income tax laws. In
addition, other factors specific to the two operating segments of the Company
include: the level of natural gas prices and changes in the ratemaking policies
of regulatory commissions for the gas segment; and new banking regulations,
interest rate sensitivity, credit risk and competition for the financial
services segment.
 
     The Bank has continued to improve its capital position by reducing its
asset base and its level of real estate investment which require higher levels
of capitalization. However, in light of regulatory changes, including more
stringent capital requirements, and in order to enhance the Bank's capital
position, the Company did not receive cash dividends from the Bank during 1993
and does not anticipate receiving cash dividends from the Bank during 1994.
 
     The Company's Board of Directors (the Board) will continue to evaluate the
Bank's cash dividend policy subject to regulatory limitations. The Board will
also continue to review the Company's investment in the Bank with an emphasis on
the Bank's capital position relative to its capital requirements. The impact of
any new capital requirements imposed on the Bank will be analyzed, and the
appropriate strategic adjustments will be determined. The Company presently does
not anticipate having to contribute additional capital to the Bank.
 
     In May 1993, the Board of Directors declared a quarterly common stock
dividend of 19.5 cents per share payable September 1, 1993, a two cents per
share or 11.4 percent increase from the previous level. The increase was
established in accordance with the Company's dividend policy which states that
the Company will pay common stock dividends at a prudent level that is within
the normal dividend payout range for its respective businesses, and that the
dividend will be established at a level considered sustainable in order to
minimize business risk and maintain a strong capital structure throughout all
economic cycles.
 
     Consolidated cash and cash equivalents decreased $11.3 million during 1993,
the result of decreased cash flow from the financial services segment of $13
million, offset somewhat by a $1.7 million increase from the gas segment. The
increase from the gas segment is mainly attributable to the proceeds from the
issuance of notes payable, offset by increased construction expenditures. The
decrease from the financial services segment is primarily due to repayment of
fixed rate long-term borrowings and deposit outflows resulting from lower
prevailing interest rates paid on deposit accounts.
 
     Inflation, as measured by the Consumer Price Index for all urban consumers
averaged 2.7 percent in 1993, 2.9 percent in 1992 and 3.1 percent in 1991.
Inflation primarily impacts the Company's labor costs, materials, purchased gas
costs and cost of capital investment.
 
     The Bank's assets and liabilities consist primarily of monetary assets
(cash, cash equivalents, debt securities and loans receivable) and liabilities
(savings deposits and borrowings) which are, or will be, converted into a fixed
amount of dollars in the ordinary course of business regardless of changes in
prices.
 
                                       30
<PAGE>   35
 
Monetary assets lose purchasing power due to inflation, but this is offset by
gains in the purchasing power of liabilities, as these obligations are repaid
with inflated dollars.
 
     In June 1993, Moody's Investors Service, Inc. upgraded the Company's
unsecured debt rating from Ba2 to Ba1. In November 1993, Duff and Phelps Credit
Rating Company lowered the Company's unsecured debt rating from BBB-(triple B
minus) to BB+ (double B plus). Standard and Poor's Corporation affirmed the
Company's unsecured long-term debt rating at BBB-during 1993.
 
     See Capital Resources and Liquidity for separate discussions of each
business segment.
 
RESULTS OF CONSOLIDATED OPERATIONS
 
  1993 vs. 1992
 
     Consolidated net income decreased $2.3 million compared to consolidated net
income from the same period a year ago. The decrease resulted from an $18.5
million decrease in net income contributed by the gas segment, offset by a $16.2
million improvement in net income contributed by the financial services segment
($13.2 million before cumulative effect of accounting change). See separate
discussions of each business segment for an analysis of these changes.
 
     Operating income increased $11.7 million in 1993 from the same period a
year ago. This was primarily the result of a $25.2 million decrease in the
provision for estimated credit losses, offset by increases in operating expense,
depreciation and general taxes.
 
     Net interest deductions in 1993 increased $6.6 million, or 15 percent,
compared to 1992. See discussion of the natural gas operations segment for an
analysis of this change.
 
     Other expenses increased $9.9 million compared to 1992. See discussion of
the natural gas operations segment for an analysis of this change.
 
     In January 1993, the Company adopted SFAS No. 109, "Accounting for Income
Taxes," and applied the provisions prospectively. The cumulative effect of this
change in method of accounting was an increase in net income of $3 million. See
Note 14 of the Notes to Consolidated Financial Statements for additional
discussion.
 
     Earnings per share decreased 10 cents to 71 cents per share in 1993.
Dividends paid increased four cents to 74 cents per share, the result of the
Board's decision to increase the quarterly dividend in May 1993. Average shares
outstanding increased by 131,000 shares.
 
  1992 vs. 1991
 
     Consolidated net income increased $31.8 million in 1992 compared to 1991
consolidated net income. The increase resulted from a $17.9 million improvement
from the financial services segment and an increase of $13.9 million contributed
by the gas segment. See separate discussions of each business segment for an
analysis of these changes.
 
     Operating income increased $46.7 million in 1992 compared to 1991 operating
income. This was primarily the result of a $30.3 million decrease in the
provision for estimated real estate and loan losses. An increase in natural gas
operating margin, partially offset by higher operating expenses, depreciation
and general taxes, also contributed to the increase in operating income.
 
     Net interest deductions decreased $1.3 million, or three percent, in 1992
compared to 1991. Lower interest rates in the prevailing market and lower
average short-term debt, including amounts owed to ratepayers, were the primary
factors contributing to the decrease in 1992.
 
     Earnings per share increased $1.57 to 81 cents in 1992. Dividends paid
decreased 35 cents to 70 cents, the result of the Board's decision to reduce the
quarterly dividend in September 1991. Average shares outstanding increased by
209,000 shares.
 
                                       31
<PAGE>   36
 
RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS
 
     In November 1992, the Financial Accounting Standards Board (FASB) issued
SFAS No. 112, "Employer's Accounting for Postemployment Benefits." The
statement, which is effective for 1994 financial statements, requires an
employer to recognize the cost of benefits provided to former or inactive
employees, after employment but before retirement, on an accrual basis, as
employees perform services to earn the benefit. The Company offers no
financially significant postemployment benefits. As a result, adoption of SFAS
No. 112 will have no material impact on the Company's financial position or
results of operations.
 
     In May 1993, the FASB issued SFAS No. 114, "Accounting by Creditors for
Impairment of a Loan." This statement is applicable to all creditors and to all
loans, uncollateralized as well as collateralized, except for large groups of
smaller-balance homogeneous loans that are collectively evaluated for
impairment, loans that are measured at fair value or at lower of cost or fair
value, leases, and debt securities as defined in SFAS No. 115, "Accounting for
Certain Investments in Debt and Equity Securities." SFAS No. 114 requires that
impaired loans be measured at the present value of expected future cash flows by
discounting those cash flows at the loan's effective interest rate or, in the
case of collateral dependent loans such as mortgage loans, at the fair value of
the collateral. A loan is considered impaired when, based on current information
and events, it is probable that a creditor will be unable to collect all amounts
due according to the contractual terms of the loan agreement. The statement
amends SFAS No. 15, "Accounting by Debtors and Creditors for Troubled Debt
Restructurings," to require a creditor to account for a troubled debt
restructuring involving a modification of terms at fair value as of the date of
the restructuring. The statement also amends SFAS No. 5, "Accounting for
Contingencies," to clarify that a creditor should evaluate the collectibility of
both contractual interest and principal of a receivable when assessing the need
for a loss accrual. The provisions of the statement apply to financial
statements issued for fiscal years beginning after December 15, 1994, with
earlier application permitted. Retroactive restatement of previously issued
annual financial statements is not permitted. The Company is analyzing its loan
portfolios to determine the impact, if any, of the statement on its results of
operations at the date of implementation.
 
     In May 1993, the FASB issued SFAS No. 115, "Accounting for Certain
Investments in Debt and Equity Securities." On December 31, 1993, the Company
early adopted SFAS No. 115. See Notes 1 and 3 of the Notes to Consolidated
Financial Statements for additional discussion.
 
                         NATURAL GAS OPERATIONS SEGMENT
 
     The Company is engaged in the business of purchasing, transporting, and
distributing natural gas in portions of Arizona, Nevada and California. Its
several service areas are geographically as well as economically diverse. The
Company is the largest distributor in Arizona, distributing and transporting gas
in most of southern, central and northwestern Arizona. The Company is also the
largest distributor and transporter of natural gas in Nevada. The Company also
distributes and transports gas in portions of California, including the Lake
Tahoe area and high desert and mountain areas in San Bernardino County.
 
     As of December 31, 1993, the Company had approximately 932,000 distribution
customers, of which 563,000 customers were located in Arizona, 266,000 in Nevada
and 103,000 in California. Residential and commercial customers represented over
99 percent of the Company's customer base.
 
     During 1993, the Company's customer base expanded by 13,000 customers in
Arizona, 20,000 in Nevada, and 2,000 in California. These increases are largely
attributable to continued population growth in the Company's service areas and
represent four percent growth in the Company's customer base. Customer growth
over the past three years averaged four percent annually, excluding customers
obtained through the 1991 acquisition of CP National Corporation (CPN) gas
properties in Nevada and southern California.
 
     During 1993, 56 percent of operating margin was earned in Arizona, 32
percent in Nevada, and 12 percent in California. This pattern is consistent with
prior years.
 
                                       32
<PAGE>   37
 
     The Company's total gas plant in service increased from $1.1 billion to
$1.3 billion, or at an annual rate of seven percent, during the three-year
period ended December 31, 1993, reflecting continued customer growth within the
Company's service territories.
 
CAPITAL RESOURCES AND LIQUIDITY
 
     The growth of the gas segment during the last several years has required
capital resources in excess of the amount of cash flow generated from operating
activities (net of dividends paid). During 1993, the gas segment's capital
expenditures were $114 million. Cash flow from operating activities (net of
dividends) provided $34 million, or approximately 30 percent, of the required
capital resources pertaining to these construction expenditures. The remainder
was provided from net external financing activities. The Company received no
dividends from the Bank during 1993 and is not dependent upon such dividends to
meet the gas segment's cash requirements.
 
     In December 1993, the Company borrowed $75 million in Clark County, Nevada,
tax-exempt industrial development revenue bonds (IDRB). The IDRB have an annual
coupon rate of 6.5 percent, are noncallable for 10 years and have a final
maturity of December 2033. The proceeds from the sale of the IDRB will be used
to finance certain additions and improvements to the Company's natural gas
distribution and transmission system in Clark County, Nevada.
 
     In December 1993, the Company borrowed $50 million in City of Big Bear
Lake, California, tax-exempt IDRB. The IDRB bear interest at a variable rate and
have a final maturity of December 2028. The proceeds from the sale of the IDRB
will be used to finance certain additions and improvements to the Company's
natural gas distribution and transmission system in San Bernardino County,
California.
 
     The Company currently estimates that construction expenditures for its gas
segment during 1994 through 1996 will be approximately $410 million, and debt
maturities and repayments, and other cash requirements are expected to
approximate $190 million. Often times there are differences between estimated
and actual results, because actual events and circumstances frequently do not
occur as expected, and those differences may be significant.
 
     Applications to proceed with a Paiute capacity expansion project were filed
with the FERC in September and October 1993. The first component of the project
will expand service to seven northern Nevada industrial gas users. The Company
has executed firm long-term transportation service agreements with these
industrial gas users. The estimated total cost of this component is $3.5
million. The second component of the project will include the construction of
new transmission pipeline facilities which will allow the Company to serve the
City of Truckee, California, an area not currently serviced by the Company, and
to provide additional capacity to existing service areas. The estimated total
cost of the second component of the expansion project is $35 million.
Proceedings on the applications are expected to commence in early 1994.
Construction is expected to take place during 1994/1995 with the projects being
placed in service before the 1995/1996 heating season.
 
     In December 1993, the Company filed an application for certification with
the CPUC to provide natural gas service to the Truckee, California area. The
cost of the proposed expansion is estimated at $25 million and would take
approximately three years to complete. The Company must also apply for various
permits and negotiate agreements before the expansion can take place. An
additional 9,200 customers could potentially be added through the expansion. The
Company plans to begin construction once the required regulatory approvals are
received.
 
     It is currently estimated that cash flow from operating activities (net of
dividends) will generate approximately 45 percent of the gas segment's total
cash requirements during 1994 through 1996. A portion of the remaining funding
requirements will be provided by $117 million of IDRB funds held in trust from
the 1993 Clark County, Nevada, Series A issue and 1993 City of Big Bear Lake,
California, Series A issue. The remaining cash requirements, including debt
refundings, are expected to be provided by external financing sources. The
timing, types, and amounts of these additional external financings will be
dependent on a number of factors, including conditions in the capital markets,
timing and amounts of rate relief, and growth factors in
 
                                       33
<PAGE>   38
 
the Company's service areas. These external financings may include the issuance
of both debt and equity securities, bank and other short-term borrowings, and
other forms of financing.
 
     The gas segment's costs of natural gas, labor and construction are the
categories most significantly impacted by inflation. Changes to the Company's
cost of gas are generally recovered through PGA mechanisms and do not
significantly impact net earnings. Labor is a component of the cost of service,
and construction costs are the primary component of rate base. In order to
recover increased costs, and earn a fair return on rate base, general rate cases
are filed by the Company, when deemed necessary, for review and approval by the
ACC, PSCN and FERC. In California, general rate cases are filed every three
years and attrition filings (a mechanism to adjust rates primarily for
inflation) are made annually for the interim periods. Regulatory lags, that is,
the time between the date increased costs are incurred and the time such
increases are recovered through the ratemaking process, do, however, impact
earnings as do disallowances of certain costs.
 
RESULTS OF NATURAL GAS OPERATIONS
 
  1993 vs. 1992
 
     Contribution to consolidated net income was $13.7 million, a decrease of
$18.5 million from 1992, the result of increased operations and maintenance
expenses, depreciation expense and general taxes partially offset by increased
operating margin. An increase in net interest deductions and the recognition of
the Arizona pipe replacement program disallowances also contributed to the
decrease in net income.
 
     Operating margin during 1993 increased $6.7 million, or two percent, over
the same period a year ago. This increase was primarily due to increased
transportation volumes, and continued customer growth in all of the Company's
service areas, combined with annualized rate relief of $1.4 million effective
January 1993 in its southern California jurisdiction, rate relief in its FERC
jurisdiction (subject to refund) effective April 1993, and $6.5 million in its
central Arizona jurisdiction effective September 1993. Weather also had a
significant impact on margin.
 
     Operating margin from weather-sensitive customers increased $1.3 million
due to the rate relief in Arizona and California, and the addition of 35,000
customers system-wide during the 12-month period. However, differences in
heating demand between periods negatively impacted operating margin from these
customers largely offsetting the favorable occurrences.
 
     Operating margin from other customers, primarily transportation, increased
$5.4 million. Transportation volumes increased by 11 percent over the prior year
as cogeneration and electric generation customers increased throughput.
 
     Operations and maintenance expenses increased $10 million, or six percent,
reflecting a general increase in labor costs, increased costs of materials and
contractor services related to maintenance and other operating expenses. These
increases are attributable to the incremental costs of providing service to the
Company's steadily growing customer base.
 
     Depreciation expense and other operating expenses (primarily property
taxes) increased $4.6 million, or six percent. During 1993, average gas plant in
service increased $105 million, or nine percent. This is attributable to capital
expenditures for the continued upgrade of existing operating facilities and the
expansion of the system to accommodate substantial customer growth, including
the capacity expansion project on Paiute's pipeline system.
 
     Net interest deductions increased $6.6 million, or 15 percent, in 1993.
Higher average outstanding long-term debt balances with associated higher
average interest rates are the primary reasons for the increased interest
expense. The increase in the average long-term debt balance is attributable to
the net impact of the issuances of $100 million in Series F Debentures and $130
million in tax-exempt IDRB during the second half of 1992. The Company used $80
million from the sale of the fixed-rate Series F Debentures to retire existing
variable-rate indebtedness, which included $40 million of short-term borrowings.
The remaining $20 million was used for general corporate purposes, including the
planned expansion and replacement of utility plant. The Company used $80 million
from the sale of the fixed-rate IDRB to retire existing variable-rate IDRB. The
 
                                       34
<PAGE>   39
 
remaining $50 million was used to finance qualifying construction expenditures
in the Company's Southern Nevada Division. The Company replaced the
variable-rate long-term debt instruments with fixed-rate debt instruments in
order to take advantage of the low interest rate environment. While interest
costs have increased in the short term, the Company believes that it will
achieve overall interest cost savings in the long term.
 
     Arizona Pipe Replacement Program Disallowances. In August 1990, the ACC
issued its opinion and order (Decision No. 57075) on the Company's 1989 general
rate increase requests applicable to the Company's Central and Southern Arizona
Divisions. Among other things, the order stated that $16.7 million of the total
capital expenditures incurred as part of the Company's Central Arizona Division
pipe replacement program were disallowed for ratemaking purposes and all costs
incurred as part of the Company's Southern Arizona Division pipe replacement
program were excluded from the rate case and rate consideration was deferred to
the Company's next general rate application, which was filed in November 1990.
 
     In October 1990, the Company filed a Complaint in the Superior Court of the
State of Arizona, against the ACC, to seek a judgement modifying or setting
aside this decision. In February 1991, the Company filed a Motion for Summary
Judgement in the Superior Court to seek a judgement summarily determining that
Decision No. 57075 of the ACC is unreasonable and unlawful and, in accordance
with that determination, modifying or setting aside Decision No. 57075 and
allowing the Company to establish and collect reasonable, temporary rates under
bond, pending the establishment of reasonable and lawful rates by the
Commission. In June 1991, the Court affirmed the ACC's rate order without
explanation or opinion. In August 1991, the Company appealed to the Arizona
Court of Appeals from the Superior Court's judgement. In April 1993, Division
Two of the Arizona Court of Appeals issued a Memorandum Decision affirming the
ACC's opinion and order. Based on this decision, the Company filed a Motion for
Reconsideration in the Court of Appeals in May 1993. The Motion for
Reconsideration was denied and the Company, in July 1993, filed a Petition for
Review with the Arizona Supreme Court. On February 25, 1994, immediately
following the denial of the Petition for Review by the Arizona Supreme Court,
the Court of Appeals issued its Mandate ordering the Company to comply with its
April 1993 Memorandum Decision.
 
     As a result of the Arizona Court of Appeals Division Two Mandate, the
Company has written off $15.9 million in gross plant related to the central and
southern Arizona pipe replacement program disallowances. The impact of these
disallowances, net of accumulated depreciation, tax benefits and other related
items, was a non-cash reduction to 1993 net income of $9.3 million, or $0.44 per
share. See Note 17 of the Notes to Consolidated Financial Statements for further
discussion.
 
  1992 vs. 1991
 
     Contribution to consolidated net income during 1992 increased $13.9
million, or 76 percent, compared to the 1991 contribution, the result of
increased operating margin partially offset by increased operations and
maintenance expenses, depreciation expense and general taxes. A decrease in net
interest deductions also contributed to the increase in net income.
 
     Both operating revenues and net cost of gas decreased significantly from
1991 primarily due to the termination of a nonregulated sales agreement between
a subsidiary of the Company and its natural gas supplier. The termination did
not materially affect operating margin. Also impacting the declines was the
conversion of Paiute to a transportation-only pipeline effective in June 1991.
Although margin was not affected, both revenues and cost of gas decreased
because Paiute no longer provides a gas sales service.
 
     Operating margin during 1992 increased $32 million, or 11 percent, compared
to 1991. Operating margin from weather-sensitive customers increased $33.7
million during 1992. This increase was due, in part, to continued customer
growth in all of the Company's service areas, combined with annualized rate
relief of $4.8 million effective January 1992 in its California jurisdiction and
$8.3 million effective March 1992 in its southern Arizona rate jurisdiction.
 
     During 1992, the Company billed an average of 40,000 more customers per
month than in 1991. In addition to continued customer growth within the
Company's service territories, this increase in the average
 
                                       35
<PAGE>   40
 
number of customers was impacted by the first full year of billings of the
11,800 customers, in Henderson, Nevada, and Needles, California, acquired from
CPN in late 1991.
 
     Operating margin from weather-sensitive customers was also favorably
impacted by differences in heating demand between years, especially during
December 1992 as compared to December 1991. Although total degree days (a
measure of relative coldness which is used as an indicator of natural gas usage)
were slightly lower in 1992, degree days in December 1992 were 20 percent
greater than in December 1991. The Company experienced colder-than-normal
weather in heating demand throughout its service territories during December
1992, whereas warmer-than-normal weather occurred during December 1991.
 
     Operations and maintenance expenses increased $5.6 million during 1992, or
four percent, reflecting a general increase in labor costs, and increased costs
of materials and contractor services related to maintenance. These increases
were attributable to the incremental costs of providing quality service to the
Company's steadily growing customer base.
 
     Depreciation expense and other expenses (primarily property taxes)
increased $7.1 million during 1992, or 11 percent. During 1992, average gas
plant increased $80 million, or seven percent. This was attributable to capital
expenditures for the continued upgrade of existing operating facilities and the
expansion of the system to accommodate substantial customer growth, including
the capacity expansion project on Paiute's pipeline system.
 
     Net interest deductions decreased $1.3 million, or three percent, in 1992
compared to 1991. Lower interest rates in the prevailing market and lower
average short-term debt, including amounts owed to ratepayers, were the primary
reasons for the decrease in 1992.
 
RATES AND REGULATORY PROCEEDINGS
 
  California
 
     Effective January 1, 1993, the Company received approval of an attrition
allowance to increase annual margin by $1.4 million in its southern and northern
California rate jurisdictions. Effective January 1, 1994, the Company received
approval of an attrition allowance to increase annual margin by $1.5 million for
its southern and northern California rate jurisdictions. Pursuant to the CPUC
rate case processing plan, the Company filed a general rate application in
January 1994 to increase annual margin by $1.1 million for its southern and
northern California rate jurisdictions effective January 1995.
 
  Nevada
 
     In March 1993, the Company filed general rate cases with the PSCN seeking
approval to increase revenues by $9.4 million, or eight percent, annually for
its southern Nevada rate jurisdiction and $3.3 million, or nine percent,
annually for its northern Nevada rate jurisdiction. The Company's last general
rate cases were September 1987 for southern Nevada and December 1988 for
northern Nevada. Since that time, general rate cases had not been necessary in
these jurisdictions primarily because of ongoing customer growth and Company
initiated cost containment measures. The Company was seeking recovery of
increased operating costs in these ratemaking areas and the restructuring of its
tariffs and rates to reflect current changes within the natural gas industry.
The PSCN issued its rate order in October 1993 and ordered the Company to reduce
general rates by $648,000 in southern Nevada and authorized a $799,000 increase
in northern Nevada. The primary reasons for the difference between the Company's
requested annual revenue increases and the amounts authorized by the PSCN
included lower authorized returns on rate base and lower authorized depreciation
expenses. The Company filed a motion for reconsideration and rehearing on
several issues following the issuance of the rate order. In January 1994, the
PSCN granted the rehearing of certain rate case issues. A hearing on these
issues is expected to commence in the second quarter of 1994. The resolution of
these issues is not expected to have a material effect on the Company's results
of operations.
 
                                       36
<PAGE>   41
 
  Arizona
 
     Current Arizona Rate Cases. In October 1993, the Company filed a rate
application with the ACC seeking approval to increase revenues by $10 million,
or 9.3 percent, annually for its southern Arizona jurisdiction. The Company is
seeking to recover increased operating costs and obtain a return on construction
expenditures, and has proposed tariff restructurings which are consistent with
the tariff modifications authorized by the ACC in its August 1993 central
Arizona decision. Hearings on the application are to commence in June 1994. A
final rate order from the ACC is expected in the fourth quarter of 1994.
 
     In October 1992, the Company filed a rate application with the ACC seeking
approval to increase revenues by $15.9 million, or 7.9 percent, annually for its
central Arizona jurisdiction. The Company sought recovery of increased operating
costs as well as modification and simplification of its tariff to accommodate
changes occurring within the industry as a result of open access transportation.
In August 1993, the ACC ruled on this case and granted the Company a $6.5
million annual revenue increase for its central Arizona rate jurisdiction,
effective September 1993. The primary reason for the difference between the
Company's $15.9 million requested annual revenue increase and the $6.5 million
annual revenue increase granted in the opinion and order was a lower authorized
return on rate base. The ACC also reduced the prior rate case disallowance
related to the Company's capital expenditures for the Central Arizona Division
pipe replacement program from $16.7 million to $14.6 million. The revision was
based on lower actual costs incurred under the program than were previously
projected. See Note 17 of the Notes to Consolidated Financial Statements for
further discussion regarding pipe replacement program disallowances.
 
     Arizona Gas Procurement. During 1991, the ACC Staff conducted a
comprehensive audit of the Company's natural gas procurement practices. The
audit covered the period January 1986 through November 1990. Issues addressed
included a review of the Company's contractual arrangement with a subsidiary and
its gas supplier for the acquisition of natural gas from nontraditional sources,
two-tiered gas cost allocation methods, unaccounted-for gas and a review of the
recovery of take-or-pay settlement costs. In July 1992, the ACC issued its order
directing the Company to refund through its PGA mechanism $5.7 million of
profits earned through the contractual arrangement with its subsidiary and its
gas supplier. The Company made the required refunds in 1992.
 
     In July 1992, the Company filed a motion with the ACC for reconsideration
of the gas procurement decision. The ACC failed to act on this motion within the
specified 20 days, and it was, therefore, deemed denied by operation of law. In
September 1992, the Company filed a Notice of Appeal with the Arizona Court of
Appeals. In January 1994, the Arizona Court of Appeals issued an opinion
affirming the decision of the ACC. The Company decided not to seek a review of
the decision in the Arizona Supreme Court.
 
  FERC
 
     In October 1992, Paiute filed a general rate case with the FERC requesting
approval to increase revenues by $6.8 million annually. Paiute is seeking
recovery of increased costs associated with its capacity expansion project that
was placed into service in February 1993. Interim rates reflecting the increased
revenues became effective in April 1993 and are subject to refund until a final
order is issued. The final order is expected in 1994.
 
     In December 1992, Paiute filed tariff revisions to comply with Order No.
636. The filing, among other things, restructured rates to reflect a new
mandatory method of pipeline rate design. The FERC accepted Paiute's filing in
May 1993, but ordered Paiute to submit additional compliance filings, which were
filed through October 1993. By order issued October 1993, the FERC approved
Paiute's restructured tariff effective November 1993. The restructured rates are
not expected to have a significant impact on the Company's results of
operations.
 
TAKE-OR-PAY
 
     At December 31, 1993, the Company had $4.3 million remaining in regulatory
asset accounts for direct bill take-or-pay (TOP) costs. These accounts included
$3.3 million related to Arizona rate jurisdictions and
 
                                       37
<PAGE>   42
 
$1 million related to the southern Nevada jurisdiction. The Company received
authorization from the ACC to recover the Arizona portion of TOP costs from all
Arizona jurisdictional customers effective June 1991 over periods of time not to
exceed six years. In January 1992, authority was granted by the PSCN to begin
recovering the southern Nevada portion of TOP costs, effective February 1992,
over negotiable periods of time. Management expects full recovery of the Arizona
and southern Nevada approved TOP costs.
 
                           FINANCIAL SERVICES SEGMENT
 
     The Bank recorded net income of $6.6 million for the year ended December
31, 1993 compared to net losses of $9.8 million and $28.4 million for the years
ended December 31, 1992 and 1991, respectively. The Bank's 1993 net income is
comprised of $7.9 million from core banking operations and a $3 million gain
from the change in method of accounting for income taxes. These items were
partially offset by a $1 million net loss, after tax, from the sale of the
Bank's Arizona branch operations (the Arizona sale) and a $3.4 million net loss,
after tax, from goodwill amortization and noncore banking operations, including
real estate development activities. Income from core banking operations improved
in 1993 as a result of lower provisions for estimated credit losses and an
improved net interest margin.
 
     In August 1993, the Bank sold its Arizona branch operations to World
Savings and Loan Association (World) of California. The Bank sold $334 million
of MBS to effect the sale of approximately $321 million of Arizona branch
deposits. The final disposition of the Bank's Arizona branch operations resulted
in an after-tax loss of approximately $1 million. See Long Term Strategic
Business Plan section of MD&A and Note 2 of the Notes to Consolidated Financial
Statements for further discussion.
 
FINANCIAL AND REGULATORY CAPITAL
 
     At December 31, 1993, stockholder's equity totaled $177 million.
Stockholder's equity increased $15.4 million compared to December 31, 1992, as a
result of net income and unrealized gains, after tax, on debt securities
available for sale. The Bank has not paid any cash dividends to the Company
since 1989. By regulation, the Bank is restricted from paying dividends to the
Company in excess of 75 percent of its net income over the preceding four
quarters. In order to continue to build its capital position, the Bank does not
anticipate paying cash dividends to the Company during 1994.
 
     During 1993, the Bank's regulatory capital levels and ratios increased
under each of the three capital standards. The increase in capital levels
resulted from net income, unrealized gains, after tax, on debt securities
available for sale, and lower levels of real estate investments and goodwill
which require deductions from capital. The Arizona sale enhanced the Bank's
capital ratios by lowering its total asset base and eliminating $5.9 million of
goodwill. The Bank's regulatory capital and resulting ratios are summarized as
follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                     DECEMBER 31, 1993                        DECEMBER 31, 1992
                           -------------------------------------    -------------------------------------
                            TANGIBLE       CORE      RISK-BASED      TANGIBLE       CORE      RISK-BASED
                           ----------   ----------   -----------    ----------   ----------   -----------
<S>                        <C>          <C>          <C>            <C>          <C>          <C>
Regulatory capital
  ratio..................        6.39%        7.14%       14.92%          3.78%        4.78%        11.50%
Minimum required ratio...        1.50         3.00         8.00           1.50         3.00          8.00
                           ----------   ----------   -----------    ----------   ----------   -----------
Excess...................        4.89%        4.14%        6.92%          2.28%        1.78%         3.50%
                           ----------   ----------   -----------    ----------   ----------   -----------
                           ----------   ----------   -----------    ----------   ----------   -----------
Regulatory capital.......  $  107,442   $  120,057    $ 130,587     $   81,614   $  103,196   $   115,115
Minimum required
  capital................      25,229       50,459       70,031         32,375       64,749        80,088
                           ----------   ----------   -----------    ----------   ----------   -----------
Excess...................  $   82,213   $   69,598    $  60,556     $   49,239   $   38,447   $    35,027
                           ----------   ----------   -----------    ----------   ----------   -----------
                           ----------   ----------   -----------    ----------   ----------   -----------
Asset base...............  $1,681,952   $1,681,952    $ 875,387     $2,158,313   $2,158,313   $ 1,001,094
                           ----------   ----------   -----------    ----------   ----------   -----------
                           ----------   ----------   -----------    ----------   ----------   -----------
</TABLE>
 
     As set forth above and discussed in Note 2 of the Notes to Consolidated
Financial Statements, as of December 31, 1993 and 1992, the Bank exceeded all
three minimum capital requirements (tangible, core and risk-based) under the
regulatory capital regulations issued by the OTS. These regulatory capital
regulations contain two transition rules, among others, that have impacted the
Bank's business strategies.
 
                                       38
<PAGE>   43
 
     The first transition rule covers certain of the Bank's residential real
estate development investments. The rule was designed to encourage the phase-out
of certain activities which are not permissible for national banks and thus,
requires the Bank to deduct from its assets and capital a percentage of its
investment in real estate development activities as measured against the level
of investment at April 12, 1989. At December 31, 1993, the Bank was required to
deduct $478,000 from its capital base as a result of these rules. The Bank
applied and received approval for use of a delayed phase-out schedule which
extends until July 1, 1996, the date for which all investments in real estate
development activities made subsequent to April 12, 1989 must be fully deducted
from assets and capital, thus requiring dollar for dollar capitalization.
 
     The second transition rule requires an immediate deduction of
"nonqualifying" goodwill and a phased deduction for qualifying "supervisory"
goodwill. At December 31, 1993, the Bank had $69.5 million of goodwill, of which
$42.5 million was nonqualifying. The remaining $27 million of qualifying
supervisory goodwill must be phased out by January 1, 1995. Effective January 1,
1992, qualifying supervisory goodwill may be included in regulatory capital in
an amount limited to 1.0 percent of tangible assets. This percentage limit
decreased to 0.75 percent effective January 1, 1993, 0.375 percent on January 1,
1994 and will reach zero percent on January 1, 1995. Due to this limitation, the
Bank is required to deduct an additional $6.3 million of supervisory goodwill
from regulatory capital on January 1, 1994. See Financial Services Activities --
Regulation for further discussion.
 
     At December 31, 1993, under fully phased-in capital rules applicable to the
Bank on July 1, 1996, the Bank exceeded its fully phased-in tangible, core and
risk-based capital requirements by $81.8 million, $56.6 million, and $43.1
million, respectively.
 
     In December 1991, FDICIA was enacted into law. FDICIA requires federal
banking regulators to take prompt corrective action if an institution fails to
satisfy minimum capital requirements. Under FDICIA, capital requirements include
a leverage limit, a risk-based capital requirement, and any other measure of
capital deemed appropriate by the federal banking regulators for measuring the
capital adequacy of an insured depository institution. All institutions,
regardless of their capital levels, are restricted from making any capital
distribution or paying management fees while not in capital requirement
compliance or if such payment would cause the institution to fail to satisfy
minimum levels for any of its capital requirements.
 
     Insured institutions are divided into five capital categories -- (1) well
capitalized, (2) adequately capitalized, (3) undercapitalized, (4) significantly
undercapitalized, and (5) critically undercapitalized. The categories are
defined as follows:
 
<TABLE>
<CAPTION>
                                               RISK-BASED        CORE CAPITAL TO            CORE
                   CATEGORY                  CAPITAL RATIO      RISK-BASED ASSETS      CAPITAL RATIO
    ---------------------------------------  --------------     ------------------     --------------
    <S>                                        <C>                   <C>                  <C>
    Well capitalized.......................      *10%                  *6%                  *5%
    Adequately capitalized.................    *8% **10%             *4% **6%             *4% **5%
    Undercapitalized.......................     *6% **8%             *3% **4%             *3% **4%
    Significantly undercapitalized.........       **6%                 **3%                 **3%
 * Greater than or equal to.
** Less than.                                                                            
</TABLE>
 
Critically undercapitalized if tangible equity to total assets ratio less than
or equal to 2%.
 
     Institutions must meet all three capital ratios in order to qualify for a
given category. At December 31, 1993, the Bank was classified as "well
capitalized."
 
     The Bank's capital ratios can be enhanced by certain actions, including the
retention of earnings, the reduction of the asset base on which the requirements
are calculated, the reduction of goodwill, the reduction of the level of real
estate investments which are required to be deducted from capital and capital
contributions from the Company. Management has pursued all of these alternatives
in order to increase its capital ratios.
 
     During 1993, the Bank achieved "well capitalized" status through a
combination of increased capital from net earnings and unrealized gains from
debt securities, and the reduction of assets and goodwill through the Arizona
sale. It is management's intent to maintain and improve the level of capital
through earnings and the stabilization of the asset base.
 
                                       39
<PAGE>   44
 
     During 1992, management pursued a strategy of reducing the size of the
Bank's asset base through a combination of sales and portfolio attrition
resulting from payoff activity in the loan and MBS portfolios. The Bank sold
$241 million of loans and received $327 million in principal repayments.
Additionally, the Bank sold $275 million of debt securities and received $294
million in principal repayments. These were partially offset by new loan
originations of $517 million and debt security purchases of $546 million.
Additionally, the Company contributed $10 million to the Bank in October 1991
and $10 million in February 1992, in exchange for common stock of the Bank.
 
     Regulatory Developments. The Office of the Comptroller of the Currency
(OCC), which is the primary regulator for national banks, has adopted a final
rule increasing the leverage ratio requirements for all but the most highly
rated national banks. The OTS is required to issue capital standards for savings
institutions that are no less stringent than those applicable to national banks.
Accordingly, the OTS has proposed to amend its capital requirements so that all
but the most highly rated savings institutions will be required to maintain a
core capital ratio between four percent and five percent. Although this
regulation has not yet been issued, FDICIA allows regulators to establish
individualized capital requirements for institutions as deemed appropriate. No
such individualized capital requirement has been imposed on the Bank.
 
     The OTS has issued a regulation which adds a component to an institution's
risk-based capital calculation in 1994. The regulation will require a reduction
of an institution's risk-based capital by 50 percent of the decline in the
institution's NPV exceeding two percent of assets under a hypothetical 200 basis
point increase or decrease in market interest rates. Based upon management's
estimate of its IRR exposure, the Bank will not be subjected to a reduction from
its risk-based capital requirement, using data as of December 31, 1993, as a
result of implementation of this standard. The federal banking regulators have
also proposed a similar regulation which may result in a more stringent capital
requirement for IRR than the current OTS regulations. FIRREA requires that the
OTS regulations be no less stringent than the federal banking regulators,
therefore, the impact of this proposed regulation on the Bank is unknown at this
time.
 
     On December 31, 1993, the Company implemented SFAS No. 115. See Note 1 of
the Notes to Consolidated Financial Statements for further discussion. Under
SFAS No. 115, unrealized holding gains and losses, net of tax, on securities
available for sale are recorded as an adjustment to stockholder's equity. Under
current OTS regulations, this component of equity is included as regulatory
capital under all three capital measures. The OTS and other Federal banking
regulators are considering issuing regulations regarding the future treatment of
this component in regulatory capital. Possible alternatives discussed include
exclusion of this component from core and tangible capital, inclusion of only
unrealized losses in regulatory capital, or excluding this component entirely
from regulatory capital. The Bank will review the impact of any new capital
requirements when they are issued, and appropriate strategic adjustments will be
considered.
 
     At December 31, 1993, the Bank has included $8.8 million in regulatory
capital as a result of implementation of this standard. Because unrealized gains
and losses on debt securities are highly correlated to changes in interest
rates, this component of equity may be volatile regardless of regulatory
treatment. The Bank estimates that a 200 basis point increase in interest rates
would decrease this component of capital by approximately $11 million based on
the December 31, 1993 debt securities available for sale portfolio.
 
CAPITAL RESOURCES AND LIQUIDITY
 
     Liquidity is defined as the Bank's ability to have sufficient cash reserves
on hand and unencumbered assets, which can be sold or utilized as collateral for
borrowings, at a reasonable cost, or with minimal losses. The Bank's debt
security portfolio provides the Bank with adequate levels of liquidity so that
the Bank is able to meet any unforeseeable cash outlays and regulatory liquidity
requirements.
 
     The Bank's primary sources of funds are earnings from its operations,
deposits, FHLB borrowings, securities sold under agreements to repurchase, other
borrowings and payments on loans and MBS. These sources are expected to generate
sufficient liquidity for the Bank.
 
     Potential liquidity demands may include funding loan commitments, deposit
withdrawals, and other funding needs. In order to achieve sufficient liquidity
for the Bank without taking a large liquid or illiquid
 
                                       40
<PAGE>   45
 
position and avoiding funding concentrations, the Bank has taken the following
actions: 1) maintaining lines of credit with authorized investment bankers; 2)
managing the debt security portfolio to ensure that maturities meet liquidity
needs; 3) limiting investment and lending activities at certain times and 4)
establishing maximum borrowing limits for meeting liquidity needs.
 
     The OTS has issued regulations regarding liquidity requirements which state
that the Bank is required to maintain an average daily balance of liquid assets
equal to at least five percent of its liquidity base (as defined in the OTS
Regulations) during the preceding calendar month. The Bank is also required to
maintain an average daily balance of short-term liquid assets equal to at least
one percent of its liquidity base as defined in the regulations. Throughout
1993, the Bank exceeded both regulatory liquidity requirements. For the month of
December the Bank's liquidity ratios were 18 percent and ten percent,
respectively. The Bank's liquidity ratio is substantially higher than the
regulatory requirement due to the Bank's increasing level of transaction
accounts. The regulatory requirement is aimed at a more traditional savings
institution which has a higher level of certificate of deposit accounts versus
transaction accounts.
 
     The Bank's long-term Strategic Business Plan, as further discussed below,
focuses on reducing the Bank's cost of funds by primarily increasing the Bank's
retail deposit base through additional transaction accounts which carry lower
interest costs and allow for customer cross-sale opportunities. The Bank's
retail deposit base decreased by $410 million during 1993 from $1.6 billion at
December 31, 1992, of which $61.1 million related to transaction accounts and
$349 million to certificate of deposit accounts of these amounts. The Arizona
sale reduced transaction accounts by $40.3 million and certificate of deposit
accounts by $281 million. Transaction accounts also decreased $31 million due to
the Bank utilizing a third party to issue official checks (cashiers checks and
money orders). Excluding the Arizona sale and the aforementioned official
checks, transaction accounts increased $10.2 million and certificate of deposit
accounts decreased $67.5 million for a net decrease of $57.3 million, which was
due to disintermediation as the result of the low interest rate environment that
existed during 1993 and the elimination of brokered certificate of deposits of
$6.9 million.
 
     In addition, during 1993 the Bank repaid fixed rate long-term borrowings,
including $10 million of FHLB advances, $25 million of unsecured senior notes,
$10.4 million of notes payable and $29.5 million of flexible reverse repurchase
agreements. The overall effect of the Arizona sale and the repayment of such
borrowings on the Bank's cost of funds was an improvement of 149 basis points.
 
     It is the responsibility of the Investment Committee to establish adequate
levels of liquidity and unencumbered assets to meet the day-to-day operational
needs of the Bank and to meet the regulatory requirements for liquidity. The
daily operational liquidity needs of the Bank in 1993 were primarily met through
$624 million of repayments on loans and debt securities, $65 million of
borrowings from the FHLB and $78.4 million of loan sales. In order to fund the
transfer of deposit balances involved with the Arizona sale, the Bank sold $334
million in debt securities for a gain of $7.4 million ($4.9 million after-tax).
 
     The Bank's borrowing capacity is a function of the availability of its
readily marketable, unencumbered assets and the Bank's financial condition.
Secured borrowings may be obtained from the FHLB in the form of advances and
from authorized investment bankers in the form of reverse repurchase agreements.
At December 31, 1993, the Bank maintained in excess of $281 million of
unencumbered assets, with a market value of $282 million, which could be
borrowed against, or sold, to increase liquidity levels.
 
     The primary management objective of the investment portfolio is to invest
the excess funds of the Bank. This includes ensuring that the Bank maintains
adequate levels of liquidity so it is able to meet any unforeseeable cash
outlays. This task is accomplished by active investment in securities that
provide the greatest return, for a given price and credit risk, in order to
maximize the total return to the Bank.
 
     The secondary management objective of the investment portfolio is to serve
as the Bank's primary short-term tool to manage the IRR exposure of the
institution. The Bank's asset/liability management objective generally requires
a trade-off between achieving the highest profitability in terms of net interest
income, while maintaining acceptable levels of IRR. To accomplish these
objectives, management can change the composition of the investment portfolio
allowing management to quickly adjust the IRR exposure of the Bank, and take
advantage of interest rate changes in the markets. The tables in Note 3 of the
Notes to Consolidated
 
                                       41
<PAGE>   46
 
Financial Statements depict the amortized cost, estimated fair values,
contractual maturity, and yields of the debt security portfolios.
 
     As of December 31, 1993, the Bank's debt security portfolio was composed of
securities with a fair value of $664 million (amortized cost of $652 million)
with a yield of 6.17 percent compared to a debt security portfolio with a fair
value of $1.2 billion (which was $11 million greater than the amortized cost)
yielding 6.52 percent at December 31, 1992.
 
     During 1993, the debt security portfolio balance declined by $500 million.
Purchases of debt securities totaled $113 million and sales totaled $361
million. The two primary reasons for the decline in the portfolio were: 1) the
funding of the Arizona sale and 2) the significant increase in debt security
prepayment rates, which provided funding for the increasing loan production and
deposit run-off experienced during most of 1993.
 
     The Bank has historically been a portfolio investor with most purchases and
securitizations maintained within the investment portfolio. During 1992, the
Bank restructured its balance sheet and changed its accounting policy as part of
a long term strategic plan to minimize IRR. As a result of this strategy, the
Bank sold $241 million of fixed-rate debt securities and changed its accounting
policy to designate all fixed-rate debt securities with maturities greater than
or equal to 25 years as available for sale.
 
     The Bank's assets and liabilities consist primarily of monetary assets
(cash, cash equivalents, debt securities and loans receivable) and liabilities
(savings deposits and borrowings) which are, or will be converted into a fixed
amount of dollars in the ordinary course of business regardless of changes in
prices. Monetary assets lose purchasing power due to inflation, but this is
offset by gains in the purchasing power of liabilities, as these obligations are
repaid with inflated dollars.
 
     The level and movement of interest rates is of much greater significance.
Inflation is but one factor that can cause interest rate volatility and changes
in interest levels. The results of operations of the Bank are dependent upon its
ability to manage such movements. See Risk Management -- Interest Rate Risk
Management herein for additional discussion.
 
RISK MANAGEMENT
 
     The financial services industry has certain risks. In order to be
successful and profitable, in an increasingly volatile and competitive
marketplace, the Bank must accept some forms of risk and manage these risks in a
safe and sound manner. Generally, transactions that the Bank enters into require
the Bank to accept some measure of credit and IRR, and utilize equity capital.
The Bank has established certain guidelines in order to manage the Bank's assets
and liabilities. These guidelines will help ensure that the risks taken and
consumption of capital are optimized to achieve maximum profitability, while
minimizing risks to equity and the federal deposit insurance fund.
 
     Interest Rate Risk Management.  IRR management is a complex and evolving
financial management discipline which represents an ongoing challenge for
financial institutions. Changes in the Bank's IRR exposure affect the current
market values of the Bank's loan, debt securities, and deposit portfolios, as
well as the Bank's future earnings. The level of the Bank's IRR exposure can
also affect the Bank's regulatory capital requirements.
 
     IRR can result from (a) timing differences in the maturity and/or repricing
of the Bank's assets, liabilities, and off-balance sheet contracts; (b) the
exercise of options embedded in the Bank's financial instruments and accounts,
such as prepayments of loans before scheduled maturity, caps on the amounts of
interest rate movement permitted for adjustable-rate loans, and withdrawals of
funds on deposit with and without stated terms to maturity; and (c) differences
in the behavior of lending and funding rates, referred to as basis risk. The
role of the Bank's asset/liability management function is to prevent the erosion
of the Bank's earnings and equity capital due to interest rate fluctuations.
 
     The Bank's Board of Directors (BOD) has established certain guidelines to
prudently manage the exposure of the Bank's net interest income, net income, and
market value of portfolio equity (MVPE) or NPV
 
                                       42
<PAGE>   47
 
to interest rate fluctuations. The guidelines include limits on the Bank's
overall IRR exposure, methods of accountability and specific reports to be
provided to it by management for periodic review, and established acceptable
activities and instruments to manage IRR. The BOD has delegated responsibility
for IRR measurement and management to the Bank's Asset/Liability Management
Committee (ALCO).
 
     To enable it to measure and manage the Bank's IRR, ALCO has developed and
maintains an IRR simulation model. The model enables the Bank to measure IRR
exposure using various assumptions and interest rate scenarios, and to
incorporate alternative strategies for the reduction of IRR exposure. ALCO
measures the Bank's IRR using several methods to provide a comprehensive view of
IRR from various perspectives. These methods include projection of current MVPE
and future periods' net interest income after rapid and sustained interest rate
movements, static analysis of repricing and maturity mismatches, or gaps,
between assets and liabilities, and analysis of the size and sources of basis
risk. Each of these analyses is a tool for the assessment of the Bank's IRR, and
is reviewed independently as well as collectively by ALCO to accurately assess
the Bank's IRR exposure. The analyses are also used as a basis for the
formulation of strategies to reduce the Bank's IRR exposure where and as needed,
thus ensuring that the Bank remains within BOD limits for overall IRR exposure.
 
     Static gap analysis measures the difference between financial assets and
financial liabilities scheduled and expected to mature or reprice within a
specified time period. The gap for that period is positive when repricing and
maturing assets exceed repricing and maturing liabilities. The gap for that
period is negative when repricing and maturing liabilities exceed repricing and
maturing assets. A positive or negative cumulative gap indicates in a general
way how the Bank's net interest income should respond to interest rate
fluctuations. A positive cumulative gap for a period generally means that rising
interest rates would be reflected sooner in financial assets than in financial
costing liabilities, thereby increasing net interest income over that period. A
negative cumulative gap for a period would produce an increase in net interest
income over that period if interest rates declined.
 
     At December 31, 1993, the Bank had financial assets of $1.7 billion with a
weighted average yield of 6.83 percent, and financial liabilities of $1.5
billion with a weighted average rate of 3.72 percent. The Bank's cumulative
one-year static gap was a negative $39.4 million, or two percent of financial
assets. The Bank's financial assets and financial liabilities are presented
according to their frequency of repricing, and scheduled and expected maturities
in the following table (thousands of dollars):
 
                                       43
<PAGE>   48
 
STATIC GAP AS OF DECEMBER 31, 1993
 
<TABLE>
<CAPTION>
                                                                      REPRICING SENSITIVITY AT 
                                                                         DECEMBER 31, 1993
                                                                 ------------------------------------
                                % OF        TOTAL      YIELD/      WITHIN         1-5         OVER 5
                                TOTAL      BALANCE     RATE        1 YEAR        YEARS        YEARS
                                -----     ----------   -----     ----------     --------     --------
<S>                             <C>       <C>          <C>       <C>            <C>          <C>
FINANCIAL ASSETS
Cash and cash
  equivalents(1)..............    7.2%    $  119,215    1.74%    $  119,215     $     --     $     --
Debt securities available for
  sale(2).....................   36.1        595,726    6.09        475,299      116,075        4,352
Debt securities held to
  maturity(2).................    4.2         69,660    6.85         61,046        7,906          708
Loans receivable:
  Loans receivable held for
     sale.....................    1.2         20,051   12.22         20,051           --           --
  Adjustable-rate real
     estate(3)
     Construction and land....    2.0         33,376    7.83         33,376           --           --
     Other real estate........   12.1        199,757    7.39        186,350       13,407           --
  Fixed-rate real estate(4)...   27.0        446,645    8.03         96,127      217,880      132,638
  Consumer, commercial
     and all other(4).........    9.2        151,050    8.88         76,013       54,632       20,405
FHLB stock(5).................    1.0         16,501    3.50         16,501           --           --
                                -----     ----------   -----     ----------     --------     --------
Total financial assets........  100.0%     1,651,981    6.83%     1,083,978      409,900      158,103
                                -----                  -----     ----------     --------     --------
                                -----                  -----
Nonfinancial assets...........                99,438
                                          ----------
          Total Assets........            $1,751,419
                                          ----------
                                          ----------
FINANCIAL LIABILITIES
Deposits:
  Interest-bearing demand and
     money market
     deposits(6)..............   21.0%    $  324,011    2.37%       324,011           --           --
  Certificates of
     deposit(1)...............   47.4        732,263    4.42        466,189      239,224       26,850
  Savings deposits(6).........    5.6         86,781    2.63         86,781           --           --
  Noninterest-bearing demand
     deposits(7)..............    4.2         64,797      --         24,722        7,227       32,848
Borrowings:
  Advances from FHLB(1).......    4.5         71,000    4.70             --       71,000           --
  Securities sold under
     agreements to
     repurchase(8)............   16.8        259,041    4.31        229,000       30,041           --
  Other(1)....................    0.5          8,265    8.91            130        8,135           --
                                -----     ----------   -----     ----------     --------     --------
Total financial liabilities...  100.0%     1,546,158    3.72%     1,130,833      355,627       59,698
                                -----                  -----     ----------     --------     --------
                                -----                  -----
Impact of hedging-fixed(9)....                    --                  7,500           --      (7,500)
                                                                 ----------     --------     --------
Nonfinancial liabilities......                28,318
  Stockholder's equity........               176,943
                                          ----------
          Total liabilities
            and stockholder's
            equity............            $1,751,419
                                          ----------
                                          ----------
Maturity gap..................                                   $  (39,355)    $ 54,273     $ 90,905
                                                                 ----------     --------     --------
                                                                 ----------     --------     --------
Cumulative gap................                                   $  (39,355)    $ 14,918     $105,823
                                                                 ----------     --------     --------
                                                                 ----------     --------     --------
Cumulative gap as a percent of
  financial assets............                                         (2.4)%        0.9%         6.4%
                                                                 ----------     --------     --------
                                                                 ----------     --------     --------
</TABLE>
 
- ---------------
 
Note: Loans receivable exclude allowance for credit losses, discount reserves,
      deferred loan fees, and accrued interest on loans.
 
                                       44
<PAGE>   49
 
Static Gap Assumptions as of December 31, 1993
 
(1) Based on the contractual maturity or term to next repricing of the
    instrument(s).
 
(2) Maturity sensitivity is based upon characteristics of underlying loans.
    Portions represented by adjustable-rate certificates are included in the
    "Within 1 Year" category, as underlying loans are subject to interest rate
    adjustment at least semiannually or annually. Portions represented by fixed
    rate loans are based on contractual maturity, and projected repayments and
    prepayments of principal.
 
(3) Adjustable-rate loans are included in each respective category depending on
    the term to next repricing and projected repayments and prepayments of
    principal.
 
(4) Maturity sensitivity is based upon contractual maturity, and projected
    repayments and prepayments of principal.
 
(5) FHLB stock has no contractual maturity. The Bank receives quarterly
    dividends on all shares owned and the balance is therefore included in the
    "Within 1 Year" category. The amount of such dividends is not fixed, and
    varies quarterly.
 
(6) Interest-bearing demand, money market deposits, and savings deposits may be
    subject to daily interest rate adjustment and withdrawal on demand, and are
    therefore included in the "Within 1 Year" category.
 
(7) Noninterest-bearing demand deposits have no contractual maturity, and are
    included in each repricing category based on the Bank's historical attrition
    of such accounts.
 
(8) Floating-rate reverse repurchase agreements are included in the "Within 1
    Year" category. Principal repayments of flexible reverse repurchase
    agreements are based on the projected timing of construction or funding of
    the underlying project.
 
(9) Hedging consisted of a fixed interest rate swap as of December 31, 1993.
 
     While the static gap analysis is a useful asset/liability management tool,
it does not fully assess IRR. Static gap analysis does not address the effects
of customer options (such as early withdrawal of time deposits, withdrawal of
deposits with no stated maturity, and mortgagors' options to prepay loans) and
Bank strategies (such as delaying increases in interest rates paid on certain
interest-bearing demand and money market deposit accounts) on the Bank's net
interest income, net income, and MVPE. In addition, the static gap analysis
assumes no changes in the spread relationships between market rates on
interest-sensitive financial instruments (basis risk), or in yield curve
relationships. Therefore, a static gap analysis is only one tool with which to
analyze IRR, and must be reviewed in conjunction with other asset/liability
management reports.
 
     Using the Bank's IRR simulation model, management also estimates the
effects of rapid and sustained interest rate movements on the Bank's current
MVPE. Beginning in 1994, the OTS will use a similar methodology to determine the
Bank's IRR component of risk-based capital, if the Bank's IRR exposure is above
the threshold established by the regulation. See Financial and Regulatory
Capital -- Regulatory Developments for further discussion. The following table
presents management's estimate of the Bank's MVPE after a hypothetical,
instantaneous 200 basis points (bp) change in market interest rates at December
31, 1993 (thousands of dollars):
 
<TABLE>
<CAPTION>
                                    CHANGE IN                           ESTIMATED
                                  INTEREST RATES                          MVPE
            ----------------------------------------------------------  ---------
            <S>                                                         <C>
             +200 bp..................................................  $ 106,051
                 0   .................................................  $ 127,207
             -200 bp..................................................  $ 119,518
</TABLE>
 
     The financial instruments approved by the BOD to manage the Bank's IRR
exposure in its balance sheet include the Bank's debt security portfolio,
interest rate swaps, interest rate caps, interest rate collars, interest rate
futures, and put and call options. These financial instruments provide effective
methods of reducing the impact of changes in interest rates on the market values
of and earnings provided by the Bank's assets and liabilities. The Bank also
actively manages its retail and wholesale funding sources to minimize its cost
of
 
                                       45
<PAGE>   50
 
funds and provide stable funding sources for its loan and investment portfolios.
Management's use of particular financial instruments is based on a complete
analysis of the Bank's current IRR exposure and the projected effect of any
proposed strategy on the Bank's IRR exposure. In addition, to manage the IRR
exposure associated with the Bank's held for sale loan portfolio, the Bank
utilizes forward sale commitments.
 
     Credit Risk Management.  One of the Bank's primary businesses is to make
and acquire loans secured by residential and other real estate to enable
borrowers to purchase, refinance, construct and improve such property. These
activities entail potential credit losses, the size of which depends on a
variety of economic factors affecting borrowers and the real estate collateral.
The Bank continues to emphasize consumer and commercial loan originations which
are generally secured by non-real estate-based collateral. During 1993, consumer
loans increased 67 percent to $137 million. While the Bank has adopted
underwriting guidelines and credit review procedures to minimize credit losses,
some losses will inevitably occur. Periodic reviews are made of the Bank's
assets in an attempt to identify and deal appropriately with potential credit
losses at an early date. The Bank continues its efforts to diversify its asset
portfolio, thereby reducing its credit risk.
 
     The Bank's Credit Administration Department is responsible for ensuring
adherence to the Bank's approved lending policies and procedures, including
proper approvals, timely completion of periodic asset reviews, early
identification of problem loans, reviewing the quality of underwriting and
appraisals, tracking trends in the Bank's asset quality and evaluating the
adequacy of the Bank's allowance for losses. To further control its credit risk,
the Bank monitors and manages its credit exposure in portfolio concentrations.
Portfolio concentrations, including collateral types, industry groups,
geographic locations, and loan types are assessed and the exposure is managed
through the establishment of limitations of aggregate exposures. The Bank has
also strengthened its underwriting guidelines, performs periodic credit reviews,
and established limitations on loans to one borrower which are more stringent
than regulatory requirements.
 
     As part of the regular asset review process, management reviews factors
relating to the possibility and magnitude of prospective loan and real estate
losses, including historical loss experience, prevailing market conditions and
classified asset levels. The Bank is required to classify assets and establish
prudent valuation allowances in accordance with OTS regulations.
 
     The Bank's Credit Administration Department is also responsible for the
maintenance of a comprehensive risk-rating system used in determining classified
assets and allowances for estimated credit losses. The system involves an
ongoing review of all assets containing an element of credit risk including
loans, real estate and investment securities. The review process assigns a risk
rating to each asset reviewed based upon various credit criteria.
 
     If the review indicates that it is probable that some portion of an asset
will result in a loss, the asset is written down to its expected recovery value.
An allocated general valuation allowance is established for each asset reviewed
which has been assigned a risk classification. The allowance is determined,
subject to certain minimum percentages, based upon probability of default (in
the case of loans), estimated ranges of recovery, and probability of each
estimate of recovery value. An allowance for estimated credit losses on
classified assets not subject to a detailed review is established by multiplying
a percentage by the aggregate balances of the assets outstanding in each risk
category. The percentages assigned increase based on the degree of risk and
reflect management's estimate of potential future losses from assets in a
specific risk category. With respect to loans not subject to specific reviews,
principally single-family residential and consumer loans, the allowance is
established based upon historical loss experience. Additionally, an unallocated
allowance is established to reflect economic conditions that may negatively
affect the portfolio in the aggregate.
 
                                       46
<PAGE>   51
 
     The Bank has also established certain guidelines and criteria in order to
manage the credit risk of investment security portfolios, including
concentration limits, credit rating and geographic distribution requirements.
The following table presents the credit quality of debt security portfolios:
 
<TABLE>
<CAPTION>
                                                  AT DECEMBER 31, 1993       AT DECEMBER 31, 1992
                        RATING:                  PERCENTAGE OF PORTFOLIO   PERCENTAGE OF PORTFOLIO
        ---------------------------------------  -----------------------   ------------------------
        <S>                                      <C>                       <C>
         AAA...................................            87.6%                      80.1%
         AA....................................             5.9                       13.4
         A.....................................             1.8                        3.0
         BBB...................................              .2                         --
         Other.................................             4.5                        3.5
                                                         ------                     ------
         Total.................................           100.0%                     100.0%
                                                         ------                     ------
                                                         ------                     ------
</TABLE>
 
     The other category primarily includes the Bank's investment in the
privately issued MBS classified as substandard, as further explained in this
section.
 
     OTS regulations require the Bank to classify certain assets into one of
three categories -- "substandard," "doubtful" and "loss." An asset which does
not currently warrant classification as substandard but which possesses
weaknesses or deficiencies deserving close attention is considered a criticized
asset and is designated as "special mention." The Bank designated $27.6 million
of its assets as "special mention" at December 31, 1993.
 
     The following table sets forth the amounts of the Bank's classified assets
and ratio of classified assets to total assets, net of specific reserves and
charge-offs, as of the dates indicated (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31,
                                          --------------------------------------------------------
                                           1993        1992         1991        1990        1989
                                          -------     -------     --------     -------     -------
<S>                                       <C>         <C>         <C>          <C>         <C>
Substandard assets:
  Loans.................................  $37,886     $55,727     $ 66,839     $25,965     $ 9,432
  Foreclosed real estate (net)..........    9,707      24,488       14,875      10,363      12,174
  Loans to facilitate...................       --          80          760         357          88
  Real estate held for investment.......    2,166       1,616       24,587       3,111          --
  Investments...........................   29,509          --           --      17,857      22,300
Doubtful assets.........................       --          --           --          --       2,225
Loss assets.............................       --          --           --          --          28
                                          -------     -------     --------     -------     -------
Total...................................  $79,268     $81,911     $107,061     $57,653     $46,247
                                          -------     -------     --------     -------     -------
                                          -------     -------     --------     -------     -------
Ratio of classified assets to total
  assets................................     4.53%       3.66%        4.54%       2.13%       1.67%
                                          -------     -------     --------     -------     -------
                                          -------     -------     --------     -------     -------
</TABLE>
 
     The Bank's "substandard" assets decreased from $82 million at December 31,
1992 to $79 million at December 31, 1993, primarily as a result of payoffs of
real estate loans and disposition of foreclosed real estate. This decrease was
partially offset by the classification of an investment in a privately issued
adjustable-rate commercial MBS. Assets classified as "substandard" are
inadequately protected by the current net worth or paying capacity of the
obligor or the collateral pledged, if any. Foreclosed real estate decreased
$14.8 million during 1993 principally as a result of the disposition of a $10.4
million multi-family property located in southern Nevada. It is the Bank's
practice to charge off all assets which it considers to be "loss." As a result,
none of the Bank's assets, net of charge-offs, were classified as "loss" at
December 31, 1993.
 
     The security classified as substandard represents a privately issued MBS
collateralized by apartments, office buildings, town homes, shopping centers and
day care centers located in various states along the southeastern seaboard and
is further supported by a credit enhancement feature. The single A credit rating
of this security was withdrawn by the rating agency in January 1993, due to the
delinquency of a large number of the loans underlying the security. Because of
the limited number of owners of the security, no quoted market value is
available on the MBS. Therefore, the Bank's management performed a credit review
of the loans underlying the MBS to determine the appropriate fair value of the
security. Based on these credit reviews, the
 
                                       47
<PAGE>   52
 
Bank determined the total estimated fair value of each security, taking into
account the credit enhancement structure. Also, based on the credit reviews, the
Bank designated $10.6 million of the security as substandard, $5.2 million was
designated as special mention, and the remainder was not classified as of
September 30, 1993. The Bank presented the results of its valuation analysis and
revised classification of the investment to the OTS during the third quarter of
1993. The OTS had no objection to the Bank's valuation methodology or
classification at that time. During the Bank's regular OTS examination in the
first quarter of 1994, the OTS concurred with the Bank's valuation methodology,
but classified the entire security balance as substandard, stating there was no
policy allowing for "split rating" of a security. The Bank has reflected the
entire balance of the security as substandard at December 31, 1993.
 
     During 1992, the Bank created a Special Assets Department with
responsibility for resolution and/or disposition of classified assets. The
department's goal is to reduce the level of classified assets through sales of
foreclosed and other real estate and resolution of classified loans.
 
     The current level of the Bank's classified assets reflects significant
improvement from the prior two years. Aggressive management of the resolution of
these assets along with some stabilization within the economy contributed to the
success in reducing the classified asset portfolio. Although progress has been
positive, the Bank is unable to predict at this time what level, if any, of
these assets may subsequently be charged off or may result in actual losses.
Steady economic growth and low interest rates should assist in the further
reduction of classified assets.
 
     During 1993, the Bank established provisions for estimated credit losses
totaling $7.2 million, of which $1 million was related to the Bank's real estate
portfolio and $6.2 million to its loan, foreclosed real estate, and debt
security portfolio. In 1992, the Bank established provisions for estimated
credit losses totaling $32.4 million, of which $18.3 million related to the
Bank's real estate portfolio and $14.1 million related to its loan and
foreclosed real estate portfolio. Of the $50.7 million provision for estimated
real estate losses recorded in 1991, $32.2 million was applicable to the Bank's
investment and loan to Margarita Village Development Company (MVDC) located in
Temecula, California.
 
     As a result of the Bank's internal review process, the general allowance
for estimated credit losses decreased to $16.3 million at December 31, 1993 from
$17.2 million at December 31, 1992. The reduced level of classified assets,
reduced charge-off activity, and the stabilization of the economy contributed to
the decrease.
 
     The Bank's loan portfolio is concentrated primarily in Nevada, California
and Arizona. The following table summarizes the geographic concentrations of the
Bank's loan portfolios at December 31, 1993 (thousands of dollars):
 
                                LOANS BY REGION
 
<TABLE>
<CAPTION>
                                                COMMERCIAL              CONSTRUCTION
                                  RESIDENTIAL    MORTGAGE    CONSUMER     AND LAND     COMMERCIAL    TOTAL
                                  -----------   ----------   --------   ------------   ----------   --------
<S>                               <C>           <C>          <C>        <C>            <C>          <C>
Nevada..........................   $ 333,473     $173,364    $106,058     $ 27,129      $ 25,297    $665,321
California......................      81,385        5,594       1,736        1,318            --      90,033
Arizona.........................      42,419        4,792      21,899          197           104      69,411
Other...........................         524        3,262       4,375        4,404            --      12,565
                                  -----------   ----------   --------   ------------   ----------   --------
          Total.................   $ 457,801     $187,012    $134,068     $ 33,048      $ 25,401    $837,330
                                  -----------   ----------   --------   ------------   ----------   --------
                                  -----------   ----------   --------   ------------   ----------   --------
</TABLE>
 
                                       48
<PAGE>   53
 
     The following table sets forth by geographic location the amount of
classified assets at December 31, 1993 (thousands of dollars):
 
                    CLASSIFIED ASSETS BY GEOGRAPHIC LOCATION
 
<TABLE>
<CAPTION>
                                                CONSTRUCTION     NON-                    INVESTMENTS
                                     MORTGAGE     AND LAND     MORTGAGE    FORECLOSED        IN
                                      LOANS        LOANS        LOANS     REAL ESTATE    REAL ESTATE    TOTAL
                                     --------   ------------   --------   ------------   -----------   -------
<S>                                  <C>        <C>            <C>        <C>            <C>           <C>
Nevada.............................  $27,958       $   32        $394        $2,301        $   797     $31,482
California.........................    4,041        4,549          --         6,566             --      15,156
Arizona............................      862           --          50           768          1,369       3,049
Other..............................   29,509           --          --            72             --      29,581
                                     --------   ------------   --------   ------------   -----------   -------
          Total....................  $62,370       $4,581        $444        $9,707        $ 2,166     $79,268
                                     --------   ------------   --------   ------------   -----------   -------
                                     --------   ------------   --------   ------------   -----------   -------
</TABLE>
 
     The mortgage loans of $29.5 million in other states represent the
classified MBS collateralized by loans in states along the southeastern
seaboard. Classified construction and land loans include committed but
undisbursed loan amounts.
 
     The following table sets forth by type of collateral, the amount of
classified assets at December 31, 1993 (thousands of dollars):
 
                       CLASSIFIED ASSETS BY TYPE OF LOAN
 
<TABLE>
<CAPTION>
                                                                 FORECLOSED     INVESTMENTS       DEBT
                                                       LOANS    REAL ESTATE    IN REAL ESTATE   SECURITY
                                                      -------   ------------   --------------   --------
<S>                                                   <C>       <C>            <C>              <C>
Single-family residential...........................  $ 7,339      $1,401          $   --       $     --
Commercial and multi-family mortgage................   25,522       5,094           1,369         29,509
Construction/land...................................    4,581       2,891             797             --
Consumer............................................      134         321              --             --
Other...............................................      310          --              --             --
                                                      -------   ------------      -------       --------
          Total.....................................  $37,886      $9,707          $2,166       $ 29,509
                                                      -------   ------------      -------       --------
                                                      -------   ------------      -------       --------
</TABLE>
 
     The largest substandard loan at December 31, 1993 was an $8.6 million
multi-family real estate loan in Nevada. In addition, the Bank had six other
substandard loans at December 31, 1993 in excess of $1 million: two multi-family
loans in Nevada, three commercial mortgage properties in Nevada, and one
single-family residential development project in California.
 
     The largest parcel of foreclosed real estate owned by the Bank at December
31, 1993, was a $2.1 million single-family residential development project in
California. The Bank also owned three parcels of foreclosed real estate at
December 31, 1993 with book values in excess of $1 million: one apartment
complex located in Nevada and two single-family residential development projects
located in California.
 
     Substandard real estate held for investment includes a $1.4 million Arizona
branch facility not included as part of the Arizona sale. This branch facility
was formerly included in premises and equipment. See Notes 2 and 5 of the Notes
to Consolidated Financial Statements for further discussion.
 
     The following table presents the Bank's net charge-off experience for loans
receivable and real estate acquired through foreclosure by loan type (thousands
of dollars):
 
<TABLE>
<CAPTION>
                                                                      NET CHARGE-OFFS
                                                                     -----------------
                                                                      1993       1992
                                                                     ------     ------
        <S>                                                          <C>        <C>
        Single-family residential..................................  $  916     $  422
        Commercial and multi-family mortgage.......................   2,275         93
        Construction/land..........................................   2,248      3,765
        Nonmortgage................................................   1,750      4,682
                                                                     ------     ------
                  Net charge-offs..................................  $7,189     $8,962
                                                                     ------     ------
                                                                     ------     ------
</TABLE>
 
                                       49
<PAGE>   54
 
     The $2.3 million of commercial mortgage charge-offs for the year ended
December 31, 1993 were comprised principally of two apartment complex properties
for $800,000 each in Nevada. One was an insubstance foreclosure and the other
was foreclosed real estate subsequently sold during 1993. Construction and land
losses in 1993 consisted primarily of two California loans totaling $1.5
million. Nonmortgage loan charge-offs were principally comprised of $1 million
of losses in installment loans and $591,000 of credit card charge-offs in 1993.
 
LONG-TERM STRATEGIC BUSINESS PLAN
 
     In 1992, the Bank developed a comprehensive long-term Strategic Business
Plan (the Plan) in order to reduce the Bank's level of interest rate, liquidity
and prepayment risks. The Plan included a review of the Bank's balance sheet
size, asset mix between fixed-rate and adjustable-rate assets, and IRR.
 
     As a result of this review, during 1992 the Bank began execution of a
strategy to restructure its balance sheet, and changed its investment policy
with regard to loans held for investment versus held for sale. The Bank's
balance sheet restructuring involved the sale of all fixed-rate single-family
mortgage loans and MBS with remaining maturities greater than or equal to 25
years, canceling interest rate swaps which hedged the IRR of such assets, and
reinvesting the proceeds of the sales in adjustable-rate MBS and five-year
fixed-rate balloon MBS.
 
     The Bank's accounting policy was amended to designate all fixed-rate loans
and debt securities with maturities greater than or equal to 25 years (which
possess normal qualifying characteristics required for sale) as available/held
for sale, along with single-family residential loans originated for specific
sales commitments. Fixed-rate loans with maturities less than 25 years, and all
adjustable-rate loans continue to be held for investment, while fixed-rate debt
securities with maturities of less than 25 years and all adjustable-rate debt
securities are either designated as held for investment or available for sale.
 
     In conjunction with the balance sheet restructuring during 1992, the Bank
sold $152 million of single-family residential fixed-rate loans, $241 million of
fixed-rate MBS, and canceled $300 million (notional amount) of interest rate
swaps hedging these assets. The Bank purchased $394 million of adjustable-rate
and balloon MBS. Additionally, the Plan included organizational restructuring,
which in some cases involved the elimination of positions. General and
administrative expenses for the year ended December 31, 1992, include $1 million
for severance benefits related to this restructuring.
 
     In the course of the development of the Bank's Plan, the BOD and management
established several core strategies. One of the primary strategies was to "right
size and right structure" the Bank in terms of balance sheet, revenue and
expenses.
 
     In the comprehensive analysis performed to determine the appropriate
balance sheet size, management determined that the Bank's total asset base
should be approximately $1.8 billion by December 1996. This analysis indicated
that an immediate reduction of the wholesale assets and liabilities of the Bank
without a corresponding decrease in noninterest expense would severely damage
core earnings and hamper the success of the Plan. As the Plan evolved, it became
more clear that the asset side of the Bank must be restructured to replace lower
yielding debt securities with higher yielding loans and that higher costing CDs
and borrowings must be replaced with lower costing transaction accounts.
 
     The implementation of the Plan emphasized the building of the Bank's retail
deposit base and the meshing of customers' deposit and loan needs. The expansion
of the Business Banking Department has contributed to the Bank's increased focus
on customer relationships. Consumer lending is expected to increase as the Bank
continues to serve its local communities.
 
     In May 1993, the Bank signed a Definitive Agreement with World Savings and
Loan Association (World) of Oakland, California, whereby World agreed to acquire
the Bank's Arizona branch operations, including all related deposit liabilities
of approximately $321 million. The transaction was approved by the appropriate
regulatory authorities and closed in August 1993. As a result of the sale, the
Bank recorded a $6.3 million loss, which included a write-off of $5.9 million in
goodwill (excess of cost over net assets acquired) and $367,000 of other related
net costs. The Bank sold $334 million of MBS to effect the sale of the
 
                                       50
<PAGE>   55
 
Bank's Arizona-based deposit liabilities to World and to maintain the Bank's
interest rate risk position. The sale of the securities resulted in a gain of
$7.4 million ($4.9 million after tax) included in gain on sale of debt
securities in the Consolidated Statements of Income. The final disposition
resulted in an after-tax loss of approximately $1 million. The transaction
resulted in an improved net interest margin, lower general and administrative
expenses, and improved regulatory capital ratios.
 
     In January 1994, the Bank sold its credit card portfolio for a gain of
approximately $1.7 million. The decision to sell this portfolio was based on the
profitability of credit cards versus other lines of business and the inability
to compete with the large, highly efficient credit card issuers with economies
and market penetration advantages. The Bank will maintain an agent bank
relationship with the holder of the credit card portfolio which will provide fee
income and cross-selling opportunities while reducing general and administrative
expenses.
 
RESULTS OF FINANCIAL SERVICES OPERATIONS
 
     The Bank's net earnings depend in large part on the difference, or interest
rate spread, between the yield it earns from its loan and debt security
portfolios and the rates it pays on deposits and borrowings.
 
                                       51
<PAGE>   56
 
     The following table reflects the components of net interest income of the
Bank for each of the three years in the period ended December 31, 1993, setting
forth average assets, liabilities and equity; interest income on
interest-earning assets and interest expense on interest-bearing liabilities;
average yields on interest-earning assets and interest-bearing liabilities; and
net interest income (thousands of dollars):
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                          -------------------------------------------------------------------------------------------------------
<S>                       <C>          <C>        <C>         <C>          <C>        <C>         <C>          <C>        <C>
                                       1993                                1992                                1991
                          -------------------------------     -------------------------------     -------------------------------
 
<CAPTION>
                           AVERAGE                AVERAGE      AVERAGE                AVERAGE      AVERAGE                AVERAGE
                           BALANCE     INTEREST    YIELD       BALANCE     INTEREST    YIELD       BALANCE     INTEREST    YIELD
                          ----------   --------   -------     ----------   --------   -------     ----------   --------   -------
<S>                       <C>          <C>        <C>         <C>          <C>        <C>         <C>          <C>        <C>
ASSETS
INTEREST-EARNING ASSETS
  Cash equivalents......  $   42,787   $  1,321     3.09%     $   38,107   $  1,349     3.54%     $   54,175   $  3,034     5.60%
  Debt securities held
    to maturity.........     425,141     26,909     6.33       1,065,593     75,955     7.13       1,216,497    106,264     8.74
  Debt securities
    available for
    sale................     542,264     30,395     5.61          12,029      1,043     8.67              --         --       --
  Loans receivable......     790,082     73,106     9.25         858,360     87,038    10.14         946,283    103,589    10.95
  FHLB stock............      16,475        594     3.61          17,392        293     1.68          20,379      1,104     5.42
                          ----------   --------   -------     ----------   --------   -------     ----------   --------   -------
Total interest-earning
  assets................   1,816,749    132,325     7.28       1,991,481    165,678     8.32       2,237,334    213,991     9.56
                                       --------   -------                  --------   -------                  --------   -------
NONINTEREST-EARNING
  ASSETS
  Real estate held for
    sale or
    development.........      26,132                              36,947                              65,245
  Premises and
    equipment, net......      28,807                              32,846                              36,249
  Other assets..........      56,443                              57,107                              32,130
  Excess of cost over
    net assets
    acquired............      73,972                              81,620                              85,746
                          ----------                          ----------                          ----------
Total assets............  $2,002,103                          $2,200,001                          $2,456,704
                          ----------                          ----------                          ----------
                          ----------                          ----------                          ----------
LIABILITIES AND
  STOCKHOLDER'S EQUITY
INTEREST-BEARING
  LIABILITIES
  Deposits..............  $1,443,628     57,643     3.99      $1,688,884     85,974     5.09      $1,693,797    114,744     6.77
  Securities under
    agreements to
    repurchase..........     305,123     13,132     4.30         204,222     12,213     5.98         246,071     18,137     7.37
  Advances from FHLB....      38,897      2,147     5.52          40,639      3,389     8.34          55,222      4,229     7.66
  Bonds payable.........          --         --       --          29,102      3,015    10.36          81,508      4,885     5.99
  Notes payable.........      14,229      1,170     8.22          19,448      1,623     8.35          20,597      1,755     8.52
  Unsecured senior
    notes...............      13,777      1,021     7.41          25,000      1,881     7.52         161,892     12,536     7.74
                          ----------   --------   -------     ----------   --------   -------     ----------   --------   -------
Total interest-bearing
  liabilities...........   1,815,654     75,113     4.14       2,007,295    108,095     5.39       2,259,087    156,286     6.92
Cost of hedging
  activities............                     24       --                      4,794      .24                      6,702      .30
                                       --------   -------                  --------   -------                  --------   -------
Cost of funds...........                 75,137     4.14                    112,889     5.63                    162,988     7.22
                                       --------   -------                  --------   -------                  --------   -------
NONINTEREST-BEARING
  LIABILITIES AND
  STOCKHOLDER'S EQUITY
  Other liabilities and
    accrued expenses....      22,914                              28,558                              33,795
  Income taxes
    payable.............          --                                  --                                (972)
                          ----------                          ----------                          ----------
Total liabilities.......   1,838,568                           2,035,853                           2,291,910
Total stockholder's
  equity................     163,535                             164,148                             164,794
                          ----------                          ----------                          ----------
Total liabilities and
  equity................  $2,002,103                          $2,200,001                          $2,456,704
                          ----------                          ----------                          ----------
                          ----------                          ----------                          ----------
Capitalized and
  transferred
  interest..............                     61       --                        972      .05                      4,200      .19
                                       --------   -------                  --------   -------                  --------   -------
Net interest income.....               $ 57,249     3.14%                  $ 53,761     2.74%                  $ 55,203     2.53%
                                       --------   -------                  --------   -------                  --------   -------
                                       --------   -------                  --------   -------                  --------   -------
Net yield on
  interest-earning
  assets................                            3.15%                               2.70%                               2.47%
                                                  -------                             -------                             -------
                                                  -------                             -------                             -------
</TABLE>
 
Note: Loans receivable include accrued interest and loans on nonaccrual, and are
      net of undisbursed funds, valuation allowances, discounts and deferred
      loan fees.
 
                                       52
<PAGE>   57
 
     The net yields on average interest-earning assets have steadily increased
(total dollar difference between interest earned and interest paid, divided by
average interest-earning assets) and were 3.15 percent, 2.70 percent and 2.47
percent for the years ended December 31, 1993, 1992 and 1991, respectively.
 
     The following table shows, for the periods indicated, the effects of the
two primary determinants of the Bank's net interest income: interest rate spread
and the relative amounts of interest-sensitive assets and liabilities. The table
also shows the extent to which changes in interest rates and changes in the
volumes of interest sensitive assets and liabilities have affected the Bank's
interest income and expense for the periods indicated. Changes from period to
period are attributed to: (i) changes in rate (change in weighted average
interest rate multiplied by prior period average portfolio balance); (ii)
changes in volume (change in average portfolio balance multiplied by prior
period rate); and (iii) net or combined changes in rate and volume. Any changes
attributable to both rate and volume that cannot be segregated have been
allocated proportionately between the two factors.
 
<TABLE>
<CAPTION>
                                                                         YEAR ENDED DECEMBER 31,
                                               ---------------------------------------------------------------------------
                                                     1993 COMPARED TO 1992                    1992 COMPARED TO 1991
                                                      INCREASE (DECREASE)                      INCREASE (DECREASE)
                                                       DUE TO CHANGES IN                        DUE TO CHANGES IN
                                               ----------------------------------       ----------------------------------
                                                VOLUME        RATE         NET           VOLUME        RATE         NET
                                               --------     --------     --------       --------     --------     --------
                                                                         (THOUSANDS OF DOLLARS)
<S>                                            <C>          <C>          <C>            <C>          <C>          <C>
INTEREST INCOME ON:
Cash equivalents.............................  $    623     $   (651)    $    (28)      $   (752)    $   (933)    $ (1,685)
Debt securities held to maturity.............   (41,340)      (7,706)     (49,046)       (12,205)     (18,104)     (30,309)
Debt securities available for sale...........    29,589         (237)      29,352          1,043           --        1,043
Loans receivable.............................    (6,635)      (7,297)     (13,932)        (9,229)      (7,322)     (16,551)
Dividends on FHLB stock......................       (15)         316          301           (142)        (669)        (811)
                                               --------     --------     --------       --------     --------     --------
Total interest income........................   (17,778)     (15,575)     (33,353)       (21,285)     (27,028)     (48,313)
                                               --------     --------     --------       --------     --------     --------
INTEREST EXPENSE ON:
  Deposits...................................   (11,402)     (16,929)     (28,331)          (335)     (28,435)     (28,770)
  Securities sold under agreements to
    repurchase...............................     2,124       (1,205)         919         (2,809)      (3,115)      (5,924)
  Advances from FHLB.........................      (140)      (1,102)      (1,242)        (1,267)         427         (840)
  Bonds payable..............................    (1,508)      (1,507)      (3,015)        (4,218)       2,348       (1,870)
  Notes payable..............................      (430)         (23)        (453)           (98)         (34)        (132)
  Unsecured senior notes.....................      (832)         (28)        (860)       (10,309)        (346)     (10,655)
                                               --------     --------     --------       --------     --------     --------
Total interest expense.......................   (12,188)     (20,794)     (32,982)       (19,036)     (29,155)     (48,191)
Benefit of hedging activity..................    (3,364)      (1,406)      (4,770)          (852)      (1,056)      (1,908)
                                               --------     --------     --------       --------     --------     --------
Cost of funds................................   (15,552)     (22,200)     (37,752)       (19,888)     (30,211)     (50,099)
Capitalized and transferred interest.........      (502)        (409)        (911)        (2,423)        (805)      (3,228)
                                               --------     --------     --------       --------     --------     --------
Net interest income..........................  $ (2,728)    $  6,216     $  3,488       $ (3,820)    $  2,378     $ (1,442)
                                               --------     --------     --------       --------     --------     --------
                                               --------     --------     --------       --------     --------     --------
</TABLE>
 
  1993 vs. 1992
 
     The Bank recorded net income of $6.6 million for the year ended December
31, 1993 compared to a net loss of $9.8 million for the year ended December 31,
1992. The increase in net earnings was principally due to the decrease in
provisions for estimated credit losses, the gain recorded on the sale of debt
securities in connection with the Arizona sale, the cumulative effect of change
in method for accounting for income taxes and an improved net interest margin,
offset partially by the write-off of goodwill as the result of the Arizona sale
as described in Note 2 of the Notes to Consolidated Financial Statements.
 
     The lower interest-earning asset base is the result of the Bank's
previously described strategy of reducing its total asset size. The decline in
the average yield on interest-earning assets is the result of the repricing of
interest sensitive loans and debt securities, repayment of higher yielding loans
and debt securities and the replacement of such loans and debt securities with
lower yielding originations and purchases.
 
     The following summarizes the significant effects of these factors:
 
     (i)    Interest on cash equivalents decreased due to the lower yield which
            was a result of the lower interest rates during the year.
 
                                       53
<PAGE>   58
 
     (ii)   Interest on debt securities, in total, decreased principally as a
            result of $294 million of payoffs and principal amortization in the
            portfolio and the third quarter effect of the sale of $334 million
            to fund the transfer of the Arizona-based deposit liabilities,
            offset partially by $113 million in debt security purchases. The
            decrease in debt securities held to maturity was the result of the
            reclassification of the majority of the portfolio to debt securities
            available for sale category during the second quarter. This resulted
            in the increase in debt securities available for sale offset
            partially by the sale of $334 million to fund the transfer of the
            Arizona-based deposit liabilities. The decrease in yield was due to
            sales of higher coupon securities in 1992 and 1993 and to repricing
            of adjustable-rate debt securities, repayments and purchase of lower
            yielding debt securities.
 
     (iii)  The average loans receivable portfolio decreased principally due to
            payoffs exceeding originations of loans held for investment. The
            average yield on loans declined as a result of lower interest rates
            on newly funded loans, repricing of adjustable loans, and payoffs of
            higher yielding loans.
 
     (iv)   Dividends on FHLB stock increased as a result of a higher declared
            dividend rate in 1993.
 
     (v)    The average balance for deposits decreased as a result of the
            Arizona sale of $321 million. The decrease in the cost of savings
            was due to the lower interest rates and the disintermediation of
            certificates of deposit accounts to transaction accounts.
 
     (vi)   The increase in interest on reverse repurchase agreements was due to
            new borrowings during the first part of 1993 partially offset by a
            decrease in the cost.
 
     (vii)  The decrease in the average balance for FHLB advances was due to the
            repayment of advances in the early part of 1993 somewhat offset by
            new borrowings later in the year. The decrease in the cost of these
            advances was due to lower interest rates on the new borrowings
            versus the higher rates on these advances paid off.
 
     (viii) The decrease in interest on bonds payable was the result of the
            payoff of mortgage-backed bonds during the second quarter of 1992.
            These bonds were called on June 30, 1992.
 
     (ix)   Interest on notes payable declined as a result of the repayment of
            $10.4 million in the third quarter of 1993.
 
     (x)    Interest on unsecured senior notes declined as a result of the
            pay-off of the $25 million balance in the third quarter of 1993.
 
     The Bank's cost of hedging activities decreased principally as a result of
the cancellation of $300 million (notional amount) of interest rate swaps
outstanding during the second and third quarters of 1992 and only $7.5 million
(notional amount) of interest rate swaps were entered into in late 1993.
 
     Provisions for estimated credit losses decreased in 1993 versus 1992 as a
result of management's evaluation of the adequacy of the allowances for
estimated credit losses. See Risk Management -- Credit Risk Management herein
and Note 6 of the Notes to Consolidated Financial Statements for further
discussion.
 
     The net gain on sale of loans decreased $2.9 million from $4.6 million in
1992 to $1.7 million in 1993 due to a decrease in the amount of loans sold from
$240 million in 1992 to $78 million in 1993. The gain on sale of mortgage loan
servicing decreased $1.9 million in 1993 as there were no sales of mortgage loan
servicing in 1993. Net gains on the sale of debt securities, including the
interest rate swap loss, increased from a net loss of $809,000 in 1992 to a net
gain of $8 million in 1993, primarily due to the sale of $361 million in debt
securities, of which $334 million were sold to fund the transfer of the
Arizona-based deposit liabilities. The net loss on the termination of the
interest rate swaps in 1992 was $14.1 million. No similar activity occurred in
1993. The net loss on the termination of the interest rate swaps was related to
the cancellation of $300 million (notional amount) of interest rate swaps which
hedged loans and debt securities sold during 1992 as part of the balance sheet
restructuring. Loan related fees decreased $1.3 million due to the decrease in
loan servicing volume. Deposit fees increased $984,000 due to an increase in the
fee structure. Other income increased principally due to a legal settlement
received of $1.2 million.
 
                                       54
<PAGE>   59
 
     General and administrative expenses increased $3 million, or seven percent,
in 1993. This increase was due to the reinstatement of employee merit increases
and incentive awards during 1993, a scheduled rent increase on office space, and
increased professional services fees from legal efforts related to California
real estate development projects.
 
     The Bank's effective tax rate was 64.1 percent in 1993 primarily as a
result of goodwill amortization and goodwill write-offs not deductible for tax
purposes.
 
  1992 vs. 1991
 
     The Bank recorded a net loss of $9.8 million for the year ended December
31, 1992 compared to a net loss of $28.4 million for the year ended December 31,
1991. The net loss was principally due to the Bank recording $32.4 million in
provisions for estimated credit losses. See Risk Management -- Credit Risk
Management herein for additional discussion.
 
     Pretax earnings from core banking operations, which exclude real estate
development activities and amortization of excess of cost over net assets
acquired, for the year ended December 31, 1992, declined to $9.7 million from
$17.5 million in 1991, principally as a result of increased provisions for
estimated credit losses and increased general and administrative expenses.
 
     Net interest income decreased in 1992 as a result of a lower
interest-earning asset base and a decline in the Bank's average yield on
interest-earning assets offset partially by a 159 basis point decline in the
Bank's cost of funds. The decline in the Bank's cost of funds was a result of
the lower interest rate environment during 1992 and a decline in the Bank's
level of wholesale borrowings.
 
     The lower interest-earning asset base was the result of the Bank's
previously described strategy of reducing its total asset size. The decline in
the average yield on interest-earning assets was the result of the repricing of
interest sensitive loans, payoffs and sales of higher yielding fixed-rate loans
and debt securities being replaced by lower yielding originations and purchases.
 
     The following summarizes the significant effects of these factors:
 
      (i)  The decrease in the average loans receivable portfolio was
           a result of 1992 sales of $240 million, along with payoffs,
           principal amortization and securitizations exceeding new loan
           originations. The average yield declined as a result of payoffs of
           higher yielding fixed-rate loans as individuals opted to refinance
           their mortgage loans, repricing of interest rate sensitive loans and
           sales of fixed-rate loans.
 
     (ii)  Debt securities in total declined, principally as a result of $294
           million of payoffs and principal amortization in the portfolio and
           sales of $275 million during the year, offset by $546 million in debt
           securities purchased. There were no debt securities designated as
           available for sale in 1991.
 
    (iii)  Interest on deposits decreased in 1992 principally as a result of
           deposit outflows due to the low interest rate environment.
 
     (iv)  Interest on reverse repurchase agreements declined as a result of
           repayments and a decline in average rates.
 
      (v)  Interest on FHLB advances declined as a result of
           repayments which was partially offset by an increase in the average
           rate.
 
     (vi)  Interest on bonds payable decreased principally as a result of the
           payoff of $74.1 million of bonds payable during 1992.
 
    (vii)  Interest on unsecured senior notes declined due to repayment of $150
           million in late 1991.
 
     The declines in the average balances of reverse repurchase agreements, FHLB
advances, bonds payable and unsecured senior notes were a result of the
previously described strategy of the Bank to shift its liability mix from
wholesale borrowings to retail deposits. The declines in average yields on
reverse repurchase agreements and unsecured senior notes resulted from the
continuing decline in short-term interest rates during 1992.
 
                                       55
<PAGE>   60
 
     The Bank's cost of hedging activities decreased $1.9 million, principally
as a result of the cancellation of $300 million (notional amount) of interest
rate swaps outstanding during the second and third quarters of 1992.
 
     Provisions for estimated credit losses increased $2.1 million in 1992
versus 1991 as a result of management's evaluation of the adequacy of the
allowances for estimated credit losses. See Risk Management -- Credit Risk
Management herein and Note 6 of the Notes to Consolidated Financial Statements
for additional discussion.
 
     In conjunction with the restructuring of the balance sheet, the Bank sold
$394 million of loans and debt securities, which resulted in net gains of $17.6
million. These gains were partially offset by the loss of $14.1 million related
to the cancellation of interest rate swaps ($300 million -- notional amount)
which served as a hedge to the assets sold. Gains on sales of loans and debt
securities not related to the restructuring amounted to $2.2 million. Loan
related fees decreased $1.1 million principally due to a lower balance in the
loan portfolio and lower interest rates. Deposit related fees and other income
increased $3.3 million principally due to increases in merchant services fee
income and fees from sales of mutual fund products.
 
     General and administrative expenses increased $4.1 million, or ten percent,
in 1992 due principally to expenses incurred in restructuring the Bank's
organization, including severance benefits and changes in staffing, and
increased regulatory assessments.
 
     The Bank recorded a $15.3 million net loss from real estate operations in
1992, compared to a net loss of $50.5 million in 1991. The 1992 and 1991 losses
are a result of recording $18.3 million and $50.7 million, respectively, in
provisions for estimated credit losses and fewer unit sales. See Risk
Management -- Credit Risk Management herein and Note 6 of the Notes to
Consolidated Financial Statements for additional discussion. The lower unit
sales volume in 1992 and 1991 was the result of the impact of the economic
recession on the California real estate market and the fewer number of active
projects in which the Bank was participating.
 
     The effective tax rate (benefit) for 1992 was 0.9 percent compared to
(23.6) percent in 1991, primarily as a result of increased provisions for
estimated losses in 1992, which were not deductible for tax purposes.
 
                                       56
<PAGE>   61
 
                      (This page intentionally left blank)
 
                                       57
<PAGE>   62
 
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
                 CONSOLIDATED STATEMENTS OF FINANCIAL POSITION
 
                             (THOUSANDS OF DOLLARS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                            DECEMBER 31,
                                                                      -------------------------
                                                                         1993           1992
                                                                      ----------     ----------
<S>                                                                   <C>            <C>
Cash and cash equivalents...........................................  $  121,342     $  132,641
Debt securities available for sale (at fair value in 1993, at lower
  of cost or fair value in 1992) (Notes 3 and 8)....................     595,726          6,780
Debt securities held to maturity (fair value of $68,738 and
  $1,170,101)
  (Note 3)..........................................................      69,660      1,158,977
Loans receivable, net of allowance for estimated losses of $16,251
  and $17,228 (Notes 4 and 6).......................................     817,279        740,868
Loans receivable held for sale (fair value of $22,019 and $19,867)
  (Note 4)..........................................................      20,051         19,543
Receivables, less reserves for uncollectibles of $1,683 and
  $1,507............................................................      98,265        110,867
Gas utility property, net of accumulated depreciation of $399,155
  and $369,806......................................................     954,488        906,420
Real estate held for sale or development, net of allowance for
  estimated losses of $935 and $1,463 (Notes 5 and 6)...............       4,088          3,014
Real estate acquired through foreclosure............................       9,707         24,488
Other property, net of accumulated depreciation of $25,229 and
  $22,563...........................................................      36,495         46,799
Excess of cost over net assets acquired.............................      69,501         79,379
Other assets........................................................     147,347        111,752
                                                                      ----------     ----------
          Total assets..............................................  $2,943,949     $3,341,528
                                                                      ----------     ----------
                                                                      ----------     ----------
                              LIABILITIES & STOCKHOLDERS' EQUITY
Deposits (Note 7)...................................................  $1,207,852     $1,622,164
Securities sold under agreements to repurchase (Note 8).............     259,041        376,859
Deferred income taxes and tax credits, net (Note 14)................     151,558        129,561
Accounts payable and other accrued liabilities......................     194,697        193,661
Notes payable (Note 10).............................................      86,000         20,000
Long-term debt, including current maturities (Note 11)..............     692,865        654,523
                                                                      ----------     ----------
          Total liabilities.........................................   2,592,013      2,996,768
                                                                      ----------     ----------
Commitments and contingencies (Note 9)
Preferred and preference stocks, including current maturities (Note
  12)...............................................................       8,058         15,316
                                                                      ----------     ----------
Stockholders' equity:
  Common stock --
     Authorized -- 30,000,000 shares
     Outstanding -- 20,997,319 shares at December 31, 1993..........      22,627         22,228
  Additional paid-in capital........................................     274,410        267,981
  Capital stock expense.............................................      (5,685)        (5,685)
  Unrealized gain, net of tax, on debt securities available for sale
     (Note 3).......................................................       8,761             --
  Retained earnings.................................................      43,765         44,920
                                                                      ----------     ----------
          Total stockholders' equity................................     343,878        329,444
                                                                      ----------     ----------
          Total liabilities and stockholders' equity................  $2,943,949     $3,341,528
                                                                      ----------     ----------
                                                                      ----------     ----------
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                       58
<PAGE>   63
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
                       CONSOLIDATED STATEMENTS OF INCOME
 
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                             ----------------------------------
                                                               1993         1992         1991
                                                             --------     --------     --------
<S>                                                          <C>          <C>          <C>
Operating revenues:
  Gas operating revenues...................................  $539,105     $534,390     $565,010
  Financial services interest income.......................   132,325      165,678      213,991
  Income from real estate operations (Note 5)..............       100        3,023          219
  Other....................................................    18,311       15,392       15,571
                                                             --------     --------     --------
          Total (Notes 15 and 16)..........................   689,841      718,483      794,791
                                                             --------     --------     --------
Operating expenses:
  Net cost of gas purchased................................   212,290      214,293      276,954
  Financial services interest expense, net.................    75,076      111,917      158,788
  Operating expense (Note 13)..............................   165,150      155,654      148,972
  Maintenance expense......................................    28,337       26,842       25,255
  Provision for estimated credit losses (Note 6)...........     7,222       32,438       62,754
  Depreciation, depletion and amortization (Note 15).......    63,583       60,668       55,349
  Taxes other than income taxes............................    24,760       22,940       21,034
  Other....................................................    25,845       17,883       16,582
                                                             --------     --------     --------
          Total............................................   602,263      642,635      765,688
                                                             --------     --------     --------
Operating income (Notes 15 and 16).........................    87,578       75,848       29,103
                                                             --------     --------     --------
Other income and (expenses):
  Other income.............................................     1,549        5,336        5,449
  Interest and amortization of debt discount and expense...   (49,706)     (43,115)     (44,461)
  Other expenses (Note 17).................................   (15,801)      (5,935)      (3,625)
                                                             --------     --------     --------
          Total............................................   (63,958)     (43,714)     (42,637)
                                                             --------     --------     --------
Income (loss) before income taxes..........................    23,620       32,134      (13,534)
Income taxes (Note 14).....................................    11,259       14,473          641
                                                             --------     --------     --------
Net income (loss) before cumulative effect of accounting
  change...................................................    12,361       17,661      (14,175)
Cumulative effect of change in method of accounting (Note
  14)......................................................     3,045           --           --
                                                             --------     --------     --------
Net income (loss) (Note 16)................................    15,406       17,661      (14,175)
Preferred/preference stock dividend requirements (Note
  12)......................................................       741        1,051        1,325
                                                             --------     --------     --------
Net income (loss) applicable to common stock (Note 16).....  $ 14,665     $ 16,610     $(15,500)
                                                             --------     --------     --------
                                                             --------     --------     --------
Earnings (loss) per share before cumulative effect of
  accounting change........................................  $    .56     $   0.81     $  (0.76)
Earnings per share from cumulative effect of change in
  method of accounting.....................................       .15           --           --
                                                             --------     --------     --------
Earnings (loss) per share of common stock (Note 16)........  $   0.71     $   0.81     $  (0.76)
                                                             --------     --------     --------
                                                             --------     --------     --------
Average number of common shares outstanding................    20,729       20,598       20,389
                                                             --------     --------     --------
                                                             --------     --------     --------
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                       59
<PAGE>   64
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                                          YEAR ENDED DECEMBER 31,
                                                                -------------------------------------------
                                                                   1993            1992            1991
                                                                -----------     -----------     -----------
<S>                                                             <C>             <C>             <C>
CASH FLOW FROM OPERATING ACTIVITIES:
  Net income (loss)...........................................  $    15,406     $    17,661     $   (14,175)
  Adjustments to reconcile net income (loss) to net cash
    provided by operating activities:
      Depreciation, depletion and amortization................       63,583          60,668          55,349
      Provision for estimated losses..........................        7,222          32,438          62,754
      Deferred income taxes...................................       27,201         (16,256)         (7,217)
      Unrecovered purchased gas costs.........................      (33,571)         24,353           2,078
      Net gain on sales of loans..............................       (1,751)         (6,563)         (2,324)
      Net gain on sales of debt securities....................       (7,973)        (13,278)            (20)
      Loss on sale of Arizona assets and services.............        6,262              --              --
      Cumulative effect of change in method of accounting for
         income taxes.........................................       (3,045)             --              --
      Other...................................................       16,157         (12,582)         16,513
                                                                -----------     -----------     -----------
         Net cash provided by operating activities............       89,491          86,441         112,958
                                                                -----------     -----------     -----------
CASH FLOW FROM INVESTING ACTIVITIES:
  Construction expenditures...................................     (115,424)       (105,595)        (81,063)
  Acquisition of CPN properties...............................           --              --         (17,077)
  Loan originations, net of repayments........................     (186,609)       (190,511)       (163,191)
  Sales of loans and loan servicing rights....................       78,353         240,605         232,652
  Purchases of debt securities................................     (113,078)       (545,706)        (66,404)
  Proceeds from sales of debt securities......................      360,853         274,802           1,164
  Proceeds from maturities and repayments of debt
    securities................................................      293,788         348,603         273,503
  Proceeds from sale of real estate held for sale or
    development...............................................        1,926          11,003          33,657
  Proceeds from sale of real estate acquired through
    foreclosure...............................................       22,916          18,030          13,461
  Additions to real estate held for development...............       (3,211)         (4,246)        (21,335)
  Termination of interest rate swaps..........................           --         (14,087)          8,231
  Proceeds from sale of Arizona assets and services...........        6,718              --              --
  Other.......................................................       (2,409)          3,147           6,117
                                                                -----------     -----------     -----------
         Net cash provided by investing activities............      343,823          36,045         219,715
                                                                -----------     -----------     -----------
CASH FLOW FROM FINANCING ACTIVITIES:
  Issuance of common stock....................................        6,790              --           7,219
  Reacquisition of preferred stock............................       (7,258)         (7,258)         (7,258)
  Dividends paid..............................................      (16,139)        (15,497)        (22,688)
  Issuance of long-term debt..................................       86,909         211,943          39,523
  Retirement of long-term debt................................      (48,567)       (231,750)       (207,688)
  Issuance (repayment) of notes payable.......................       66,000         (60,000)         45,000
  Net change in deposit accounts..............................      (92,815)       (111,446)         39,569
  Sale and assumption of Arizona deposit liabilities..........     (320,902)             --              --
  Proceeds from repos/other borrowings........................    1,499,893       1,448,546       1,178,627
  Repayment of repos/other borrowings.........................   (1,617,711)     (1,336,220)     (1,362,741)
  Other.......................................................         (813)           (878)             84
                                                                -----------     -----------     -----------
         Net cash used in financing activities................     (444,613)       (102,560)       (290,353)
                                                                -----------     -----------     -----------
         Net change in cash and cash equivalents..............      (11,299)         19,926          42,320
  Cash and cash equivalents at beginning of period............      132,641         112,715          70,395
                                                                -----------     -----------     -----------
  Cash and cash equivalents at end of period..................  $   121,342     $   132,641     $   112,715
                                                                -----------     -----------     -----------
                                                                -----------     -----------     -----------
Supplemental disclosures of cash flow information
  Cash paid during the year for:
      Interest, net of amounts capitalized....................  $    66,885     $    73,513     $    90,221
      Income taxes, net of refunds............................       10,982          13,293           5,929
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                       60
<PAGE>   65
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                         COMMON              ADDITIONAL   CAPITAL
                         STOCK     COMMON     PAID-IN      STOCK    UNREALIZED   RETAINED
                        (SHARES)    STOCK     CAPITAL     EXPENSE      GAIN      EARNINGS    TOTAL
                        --------   -------   ----------   -------   ----------   --------   --------
<S>                     <C>        <C>       <C>          <C>       <C>          <C>        <C>
DECEMBER 31, 1990.....   20,036    $21,666    $261,197    $(5,690)    $   --     $76,081    $353,254
Common stock
  issuances...........      562       562        6,720                                         7,282
Net loss..............                                                           (14,175 )   (14,175)
Preferred stock
  dividends...........                                                              (665 )      (665)
Second preference
  stock dividends.....                                                              (615 )      (615)
Common stock
  dividends...........                                                           (17,932 )   (17,932)
Other.................                                         5                      (5 )        --
                        --------   -------   ----------   -------   ----------   --------   --------
DECEMBER 31, 1991.....   20,598    22,228      267,917    (5,685 )        --      42,689     327,149
Common stock
  issuances...........                              64                                            64
Net income............                                                            17,661      17,661
Preferred stock
  dividends...........                                                              (589 )      (589)
Second preference
  stock dividends.....                                                              (422 )      (422)
Common stock
  dividends...........                                                           (14,419 )   (14,419)
                        --------   -------   ----------   -------   ----------   --------   --------
DECEMBER 31, 1992.....   20,598    22,228      267,981    (5,685 )        --      44,920     329,444
Common stock
  issuances...........      399       399        6,429                                         6,828
Net income............                                                            15,406      15,406
Preferred stock
  dividends...........                                                              (513 )      (513)
Second preference
  stock dividends.....                                                              (228 )      (228)
Common stock
  dividends...........                                                           (15,820 )   (15,820)
Unrealized gain.......                                                 8,761                   8,761
                        --------   -------   ----------   -------   ----------   --------   --------
DECEMBER 31, 1993.....   20,997    $22,627    $274,410    $(5,685)    $8,761     $43,765    $343,878
                        --------   -------   ----------   -------   ----------   --------   --------
                        --------   -------   ----------   -------   ----------   --------   --------
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                       61
<PAGE>   66
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Basis of Presentation -- The accompanying financial statements are
presented on a consolidated basis and include the accounts of the Company,
including the Bank. Intercompany balances and transactions have been eliminated.
Certain amounts for prior years have been reclassified to conform to the current
year's presentation. See Selected Financial Data for information related to each
business segment. Such information should be read in conjunction with these
financial statements.
 
     For purposes of reporting consolidated cash flows, cash and cash
equivalents include cash on hand, amounts due from banks, federal funds sold and
other financial instruments with a maturity of three months or less.
 
     The Company follows generally accepted accounting principles (GAAP) in all
of its businesses. Accounting for the Company's gas utility operations conforms
with GAAP as applied to regulated companies and as prescribed by federal
agencies and the commissions of the various states in which the utility
operates.
 
     Debt Securities -- On December 31, 1993, the Bank adopted SFAS No. 115,
"Accounting for Certain Investments in Debt and Equity Securities." The
statement requires classification of investments in debt and equity securities
into one of three categories: held to maturity, available for sale, or trading.
At the time of purchase, the Bank will designate a security into one of these
three categories.
 
     Debt securities classified as held to maturity are those which the Bank has
the positive intent and ability to hold to maturity. These securities are
carried at cost adjusted for the amortization of the related premiums or
accretion of the related discounts into interest income using the level-yield
method over the remaining period until maturity. The Bank has the ability and it
is its policy to hold the debt securities so designated until maturity. The
Bank's accounting policy states that no security with a remaining maturity
greater than 25 years may be designated as held to maturity.
 
     Securities classified as available for sale are those which the Bank
intends to hold for an indefinite period and may be sold in response to changes
in market interest rates, changes in the security's prepayment risk, the Bank's
need for liquidity, changes in the availability and yield of alternative
investments, and other asset/liability management needs. Securities classified
as available for sale are stated at fair value at December 31, 1993 in the
Consolidated Statements of Financial Position. Changes in fair value are
reported net of tax as a separate component of stockholders' equity but are not
included in net income. At December 31, 1993, the Bank included an $8.8 million
unrealized gain, net of tax, on $596 million of debt securities available for
sale as a separate component of stockholders' equity. Realized gains or losses
are recorded into income when sold. Debt securities available for sale at
December 31, 1992 were accounted for at the lower of cost or fair value.
 
     Trading securities are those which are bought and held principally for the
purpose of selling in the near term. Trading securities include MBS held for
sale in conjunction with mortgage banking activities. Trading securities are
measured at fair value with changes in fair value included in earnings. At
December 31, 1993, no securities were designated as "trading securities."
 
     Mortgage Banking Activities -- The Bank's accounting policy is to designate
all fixed-rate interest-sensitive assets with maturities greater than or equal
to 25 years (which possess normal qualifying characteristics required for sale)
as held for sale or available for sale, along with single-family residential
loans originated for specific sales commitments. Fixed-rate interest-sensitive
assets with maturities less than 25 years, and all adjustable-rate
interestsensitive assets continue to be held for investment or available for
sale unless designated as held for sale at time of origination.
 
     Loans held for sale are carried at the lower of amortized cost or fair
value as determined by outstanding investor commitments or, in the absence of
such commitments, current investor yield requirements calculated
 
                                       62
<PAGE>   67
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
on an aggregate basis. Valuation adjustments are charged against gain on sale of
loans. Gains and losses on loan and MBS sales are determined using the specific
identification method. Gains and losses are recognized to the extent that sales
proceeds exceed or are less than the carrying value of the loans and MBS. Loans
sold with servicing retained have included a normal servicing fee to be earned
by the Bank as income over the life of the loan. Loans held for sale may be
securitized into MBS and designated as trading securities. Prior to December 31,
1993, and implementation of SFAS No. 115, MBS created from mortgage banking
activities were designated as held for sale and recorded at the lower of
aggregate cost or market. Subsequently, these MBS will be designated as trading
securities and recorded at fair value.
 
     The Bank hedges interest rate risk on fixed-rate loan commitments expected
to close and the inventory of loans held for sale through a combination of
commitments from permanent investors, optional delivery commitments, and
mandatory forward contracts. Related hedging gains and losses are recognized at
the time gains and losses are recognized on the related loans.
 
     Loans Receivable -- Real estate loans are recorded at cost, net of the
undisbursed loan funds, loan discounts, unearned interest, deferred loan fees
and provisions for estimated losses. Interest on loans receivable is credited to
income when earned. Generally, when a loan becomes 90 days contractually
delinquent, the accrual of interest is ceased and all previously accrued, but
uncollected, interest income is reversed. Interest income on loans placed on
nonaccrual status is generally recognized on a cash basis.
 
     Fees are charged for originating and in some cases, for committing to
originate loans. Loan origination and commitment fees, offset by certain direct
origination costs, are deferred, and the net amounts amortized as an adjustment
of the related loans' yields over the contractual lives thereof. Unamortized
fees are recognized as income upon the sale or payoff of the loan.
 
     Unearned interest, premiums and discounts on consumer installment, equity
and property improvement loans are amortized to income over the expected lives
of the loans using a method which approximates the level-yield method.
 
     Concentrations of Credit Risk -- The Company's business activity with
respect to gas utility operations is conducted with customers located within the
three state region of Arizona, Nevada and California. Any credit risk the
Company is exposed to related to utility operations is minimized by the taking
of security deposits. Provisions for uncollectible accounts are recorded monthly
and are recovered from customers through billed rates.
 
     The Bank's portfolio of loans is collateralized by real estate located
principally in Nevada, California and Arizona. Collectibility is, therefore,
somewhat dependent upon these areas' economies and real estate values.
 
     Gas Utility Property, Net -- Gas utility property, net includes gas plant
at original cost, less the accumulated provision for depreciation and
amortization, plus the unamortized balance of acquisition adjustments. Original
cost includes contracted services, material, payroll and related costs such as
taxes and benefits, general and administrative expenses, and an allowance for
funds used during construction less contributions in aid of construction.
Acquisition adjustments are amortized over the estimated remaining life of the
acquired properties.
 
     Real Estate Acquired Through Foreclosure -- Real estate acquired through
foreclosure is stated at the lower of cost or fair value less cost to sell.
Included in real estate acquired through foreclosure is $5.5 million and $21.7
million of loans foreclosed in-substance at December 31, 1993 and 1992,
respectively. Write downs to fair value, disposition gains and losses, and
operating income and costs are charged to the allowance for estimated credit
losses.
 
                                       63
<PAGE>   68
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
     Loans foreclosed in-substance consist of loans accounted for as foreclosed
property even though actual foreclosure has not occurred. Although the
collateral underlying these loans has not been repossessed, the borrower has
little or no equity in the collateral at its current estimated fair value.
Proceeds for repayment are expected to come only from the operation or sale of
the collateral, and it is doubtful the borrower will rebuild equity in the
collateral or repay the loan by other means in the foreseeable future. The
amounts ultimately recovered from loans foreclosed in-substance could differ
from the amounts used in arriving at the net carrying value of the assets
because of future market factors beyond management's control or changes in
strategy for recovering the investment.
 
     Allowance for Estimated Credit Losses -- On a routine basis, management
evaluates the adequacy of the allowances for estimated losses on loans,
investments and real estate, and establishes additions to the allowances through
provisions to expense. The Bank utilizes a comprehensive internal asset review
system and general valuation allowance methodology. General valuation allowances
are established for each of the loan, investment and real estate portfolios for
unforeseen losses. A number of factors are taken into account in determining the
adequacy of the level of allowances including management's review of the extent
of existing risks in the portfolios, prevailing and anticipated economic
conditions, actual loss experience, delinquencies, regular reviews of the
quality of the Bank's loan and real estate portfolios by the Bank's Risk
Management Committee and examinations by regulatory authorities.
 
     Charge-offs are recorded on particular assets when it is determined that
the fair or net realizable value of an asset is below the carrying value. When a
loan is foreclosed, the asset is written down to fair value based on a current
appraisal of the subject property.
 
     While management uses currently available information to evaluate the
adequacy of allowances and estimate identified losses for charge off, ultimate
losses may vary from current estimates. Adjustments to estimates are charged to
earnings in the period in which they become known.
 
     Interest Rate Exchange Agreements -- The Bank uses interest rate swaps and
interest rate collars to hedge its exposure to interest rate risk. These
instruments are used only to hedge asset and liability portfolios and are not
used for speculative purposes. Premiums, discounts and fees associated with
these interest rate exchange agreements are amortized to expense on a
straight-line basis over the lives of the agreements. The net interest received
or paid is reflected as interest expense. Gains or losses resulting from the
cancellation of agreements hedging assets and liabilities which remain
outstanding are deferred and amortized over the remaining contract lives. Gains
or losses are recognized in the current period if the hedged asset or liability
is retired.
 
     Deferred Gas Costs -- The gas segment is authorized by the various
regulatory authorities having jurisdiction to adjust its billing rates for
changes in the cost of gas purchased. The difference between the current cost of
gas purchased and the cost of gas recovered in billed rates is deferred.
Generally, these deferred amounts are recovered or refunded within one year.
 
     Revenues -- Gas revenues are accrued from the date the customer was last
billed to the end of the accounting period. In California, the Company is
authorized to adjust gas revenues to reflect changes in operating margins from
authorized levels related to all customer classes.
 
     Depreciation and Amortization -- Depreciation is computed on the
straight-line remaining life method at composite rates considered sufficient to
amortize costs over estimated service lives. Excess of cost over net assets
acquired is amortized on a straight-line basis over 25 years. Costs related to
refunding utility debt and debt issuance expenses are deferred and amortized
over the weighted average lives of the new issues.
 
                                       64
<PAGE>   69
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
     Capitalization of Interest -- The Company capitalized $381,000, $934,000
and $631,000 of interest expense and a portion of the cost of equity funds
related to natural gas utility operations for each of the years ended December
31, 1993, 1992 and 1991. The cost of equity funds used to finance the
construction of utility plant are reported net within the consolidated
statements of income as a reduction of interest charges. Utility plant
construction costs, including cost of equity funds, are recovered in authorized
rates through depreciation when completed projects are placed into operation.
 
     Income Taxes -- Effective January 1993, the Company adopted SFAS No. 109,
"Accounting for Income Taxes," which required a change from the deferred method
of accounting for income taxes to the asset and liability method of accounting
for income taxes. Under the asset and liability method, deferred tax assets and
liabilities are recognized for the future tax consequences attributable to
differences between the financial statement carrying amounts of existing assets
and liabilities and their respective tax bases. Deferred tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. Under SFAS No. 109, the effect on deferred tax assets and
liabilities of a change in tax rates is recognized in the period that includes
the enactment date.
 
     For years prior to 1993, deferred income taxes were recognized for income
and expense items that were reported in different years for financial reporting
purposes and income tax purposes using the tax rate applicable for the year of
the calculation. Under the deferred method, deferred taxes were not adjusted for
subsequent changes in tax rates.
 
     Investment tax credits (ITC) related to gas utility operations are deferred
and amortized over the life of related fixed assets.
 
                                       65
<PAGE>   70
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA
 
     Summarized consolidated financial statement data for the Bank is as
follows. Certain reclassifications have been made to conform presentations for
prior years with the current year's presentation:
 
                       CONSOLIDATED STATEMENTS OF INCOME
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                             ----------------------------------
                                                               1993         1992         1991
                                                             --------     --------     --------
<S>                                                          <C>          <C>          <C>
Interest income............................................  $132,325     $165,678     $213,991
Interest expense...........................................    75,076      111,917      158,788
                                                             --------     --------     --------
          Net interest income..............................    57,249       53,761       55,203
Provision for estimated credit losses......................    (6,212)     (14,129)     (12,058)
                                                             --------     --------     --------
          Net interest income after provision for credit
            losses.........................................    51,037       39,632       43,145
                                                             --------     --------     --------
Income from real estate operations.........................       100        3,023          219
Provision for estimated real estate losses.................    (1,010)     (18,309)     (50,696)
                                                             --------     --------     --------
Net loss from real estate operations.......................      (910)     (15,286)     (50,477)
Gain on sale of loans......................................     1,835        5,676        2,324
Loss on sale of loans......................................       (84)      (1,043)          --
Gain on sale of debt securities............................     8,317       13,649           36
Loss on sale of debt securities............................      (344)        (371)         (16)
Loss on secondary marketing hedging activities.............      (968)          --           --
Gain on sale of mortgage loan servicing....................        --        1,930           --
Gain (loss) on interest rate swaps.........................        --      (14,087)       5,727
Loss on sale -- Arizona branches...........................    (6,262)          --           --
Loan related fees..........................................     1,025        2,280        3,428
Deposit related fees.......................................     6,397        5,413        3,811
Other income...............................................     2,133        1,945          261
                                                             --------     --------     --------
                                                               62,176       39,738        8,239
General and administrative expenses........................    48,296       45,309       41,237
Amortization of cost in excess of net assets acquired......     3,984        4,156        4,156
                                                             --------     --------     --------
Income (loss) before income taxes..........................     9,896       (9,727)     (37,154)
Income tax expense (benefit)...............................     6,345           91       (8,754)
                                                             --------     --------     --------
Net income (loss) before cumulative effect of accounting
  change...................................................     3,551       (9,818)     (28,400)
Cumulative effect of change in method of accounting........     3,045           --           --
                                                             --------     --------     --------
          Net income (loss)................................  $  6,596     $ (9,818)    $(28,400)
                                                             --------     --------     --------
                                                             --------     --------     --------
          Contribution to consolidated net income
            (loss)(1)......................................  $  1,655     $(14,553)    $(32,466)
                                                             --------     --------     --------
                                                             --------     --------     --------
</TABLE>
 
- ---------------
 
(1) Includes after-tax allocation of costs from parent.
 
                                       66
<PAGE>   71
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
                 CONSOLIDATED STATEMENTS OF FINANCIAL POSITION
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                                    DECEMBER 31,
                                                  -------------------------------------------------
                                                   CARRYING       FAIR       CARRYING       FAIR
                                                    VALUE        VALUE        VALUE        VALUE
                                                     1993         1993         1992         1992
                                                  ----------   ----------   ----------   ----------
<S>                                               <C>          <C>          <C>          <C>
ASSETS
Cash and due from banks........................   $   55,712   $   55,712   $   53,193   $   53,193
Cash equivalents...............................       63,503       63,503       79,000       79,000
Debt securities available for sale.............      595,726      595,726        6,780        6,924
Debt securities held to maturity...............       69,660       68,738    1,158,977    1,170,101
Loans receivable held for sale.................       20,051       22,305       19,543       19,867
Loans receivable, net of allowance for
  estimated credit losses of $16,251 in 1993
  and $17,228 in 1992..........................      817,279      841,127      740,868      747,686
Real estate acquired through foreclosure.......        9,707       *            24,488       *
Real estate held for sale or development, net
  of allowance for estimated losses of $935 in
  1993 and $1,463 in 1992......................        4,088       *             3,014       *
FHLB stock, at cost............................       16,501       16,501       16,953       16,953
Other assets...................................       29,691       *            55,539       *
Excess of cost over net assets acquired........       69,501       *            79,379       *
                                                  ----------                ----------
                                                  $1,751,419                $2,237,734
                                                  ----------                ----------
                                                  ----------                ----------
LIABILITIES AND STOCKHOLDER'S EQUITY
Deposits.......................................   $1,207,852   $1,217,225   $1,622,164    1,648,866
Securities sold under agreements to
  repurchase...................................      259,041      261,625      376,859      381,744
Advances from FHLB.............................       71,000       71,281       16,000       16,563
Notes payable..................................        8,265        8,647       18,640       19,219
Unsecured senior notes.........................           --           --       25,000       25,525
Other liabilities..............................       28,318       *            17,485       *
                                                  ----------                ----------
                                                   1,574,476                 2,076,148
Stockholder's equity...........................      176,943       *           161,586       *
                                                  ----------                ----------
                                                  $1,751,419                $2,237,734
                                                  ----------                ----------
                                                  ----------                ----------
</TABLE>
 
- ---------------
 
* These items are not comprised of financial instruments and, therefore, are not
  applicable under SFAS No. 107. See SFAS No. 107 discussion herein.
 
                                       67
<PAGE>   72
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                       DECEMBER 31,
                                                         -----------------------------------------
                                                                1993                  1992
                                                         -------------------   -------------------
                                                                       FAIR                  FAIR
                                                         COMMITMENT   VALUE    COMMITMENT   VALUE
                                                         ----------   ------   ----------   ------
                                                                  (THOUSANDS OF DOLLARS)
<S>                                                      <C>          <C>      <C>          <C>
OFF-BALANCE SHEET ITEMS
Outstanding commitments to originate loans.............   $ 47,903    $   53    $ 32,398    $   31
Commercial and other letters of credit.................      1,169        12       1,700        13
Interest rate swaps....................................      7,500       169          --        --
Loan servicing rights..................................    476,835     4,451     565,259     5,420
Outstanding firm commitments to sell loans and MBS.....     25,905        21      33,297      (131)
Outstanding master commitments to sell loans...........    217,393       (11)     36,412       (15)
Outstanding commitments to purchase loans and MBS......     51,500         3      70,000       310
</TABLE>
 
FAIR VALUE OF FINANCIAL INSTRUMENTS
 
     SFAS No. 107, "Disclosures About Fair Value of Financial Instruments,"
requires that the Bank disclose estimated fair values for its financial
instruments.
 
     The fair value estimates were made at a discrete point in time based on
relevant market information and other information about the financial
instruments. Because no active market exists for a significant portion of the
Bank's financial instruments, fair value estimates were based on judgements
regarding current economic conditions, risk characteristics of various financial
instruments, prepayment assumptions, future expected loss experience and other
factors. These estimates are subjective in nature and involve uncertainties and
matters of significant judgement and therefore cannot be determined with
precision. Changes in assumptions could significantly affect the estimates.
 
     In addition, the fair value estimates were based on existing on-balance
sheet and off-balance sheet financial instruments without attempting to estimate
the value of existing and anticipated future customer relationships and the
value of assets and liabilities that were not considered financial instruments.
Significant assets and liabilities that were not considered financial assets or
liabilities include the Bank's retail branch network, deferred tax assets and
liabilities, furniture, fixtures and equipment, and goodwill.
 
     Additionally, the Bank intends to hold a significant portion of its assets
and liabilities to their stated maturities. Therefore, the Bank does not intend
to realize any significant differences between carrying value and fair value
through sale or other disposition. No attempt should be made to adjust
shareholders' equity to reflect the fair value disclosures.
 
                                       68
<PAGE>   73
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
     Methods and assumptions used to determine estimated fair values are set
forth below for the Bank's financial instruments as of December 31, 1993 and
1992.
 
<TABLE>
<CAPTION>
               ASSETS                   METHODS AND ASSUMPTIONS USED TO ESTIMATE FAIR VALUE
- -------------------------------------  ------------------------------------------------------
<S>                                    <C>
Cash, due from banks and cash          Carrying value was used as the estimate of fair value
  equivalents                          based upon the short-term nature of the instruments.
Debt securities available for sale,    Fair value was estimated using quotes, with the
  debt securities held to maturity     exception of privately issued debt securities and CMO
  and loans receivable held for sale   residuals. Privately issued debt securities were
                                       valued based on the estimated fair value of the
                                       underlying loans. CMO residuals were valued using the
                                       discounted estimated future cash flows from these
                                       investments.
Loans receivable, net                  Fair values were estimated for portfolios of loans
                                       with similar financial characteristics. Loans were
                                       segregated by type, such as commercial, commercial
                                       real estate, residential mortgage, credit card and
                                       other consumer. Each loan category was further
                                       segregated into fixed and adjustable interest rate
                                       components. Fair value for single-family residential
                                       loans was estimated by discounting the estimated
                                       future cash flows from these instruments using quoted
                                       market rates and dealer prepayment assumptions. Fair
                                       value for commercial mortgage, construction, land and
                                       other commercial loans was derived by discounting the
                                       estimated future cash flows from these instruments
                                       using the rates at which loans with similar maturity
                                       and underwriting characteristics would be made on
                                       December 31, 1993 or 1992, as applicable. Fair value
                                       for consumer loans was estimated using dealer quotes
                                       for securities backed by similar collateral. The book
                                       value for the allowance for estimated credit losses
                                       was used as the fair value estimate for credit losses
                                       within the entire loan portfolio.
FHLB stock                             Carrying value was used as the estimate for fair value
                                       since it represents the price at which the FHLB will
                                       redeem the stock.
LIABILITIES
- -------------------------------------
Deposits                               The fair value of demand deposits, savings deposits
                                       and money market deposits was estimated to be the book
                                       value reported in the financial statements since it
                                       represents the amount payable on demand. The fair
                                       value of fixed maturity deposits was estimated using
                                       the rates currently offered by the Bank for deposits
                                       with similar remaining maturities. The fair value of
                                       deposits does not include an estimate of the long-term
                                       relationship value of the Bank's deposit customers or
                                       the benefit that results from the low cost funding
                                       provided by deposit liabilities compared to the cost
                                       of borrowing funds in the market.
Securities sold under agreements to    Fair value was estimated by discounting the future
  repurchase, notes payable and        cash flows using market and dealer quoted rates for
  unsecured senior notes               debt with the same remaining maturities and
                                       characteristics.
</TABLE>
 
                                       69
<PAGE>   74
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
 
<TABLE>
<CAPTION>
             LIABILITIES                METHODS AND ASSUMPTIONS USED TO ESTIMATE FAIR VALUE
- -------------------------------------  ------------------------------------------------------
<S>                                    <C>
Advances from FHLB                     Fair value was estimated using the quoted cost to
                                       prepay the advance.
OFF-BALANCE SHEET ITEMS
- -------------------------------------
Commitments to originate loans         The fair value of commitments was estimated by
                                       calculating a theoretical gain or loss on the sale of
                                       a funded loan considering the difference between
                                       current levels of interest rates and the committed
                                       loan rates.
Letters of credit                      The fair value of letters of credit was based on fees
                                       currently charged for similar agreements.
Loan servicing rights                  The fair value for loan servicing rights was estimated
                                       based upon market and dealer quotes for the
                                       incremental price paid for a loan sold servicing
                                       released, adjusted for the age of the portfolio.
Outstanding firm and master commit-    The fair value of these commitments are estimated
  ments to purchase and sell loans     based on the market and dealer quotes to terminate or
  and MBS                              fill the commitments.
</TABLE>
 
SALE OF ARIZONA BRANCH OPERATIONS
 
     In May 1993, the Bank signed a Definitive Agreement with World Savings and
Loan Association (World) of Oakland, California, whereby World agreed to acquire
the Bank's Arizona branch operations, including all related deposit liabilities
of approximately $321 million. The transaction was approved by the appropriate
regulatory authorities and closed in August 1993. As a result of the sale, the
Bank recorded a $6.3 million loss, which included a write-off of $5.9 million in
goodwill (excess of cost over net assets acquired) and $367,000 of other related
net costs. The Bank sold $334 million of MBS to effect the sale of the Bank's
Arizona-based deposit liabilities to World and to maintain the Bank's interest
rate risk position. The sale of the securities resulted in a gain of $7.4
million ($4.9 million after tax) included in gain on sale of debt securities in
the Consolidated Statements of Income. The final disposition resulted in an
after-tax loss of approximately $1 million.
 
REGULATORY CAPITAL
 
     Under FIRREA, thrifts must maintain minimum capital ratios of tangible
capital equal to 1.5 percent of tangible assets, core capital equal to three
percent of core assets and risk-based capital equal to eight percent of
risk-based assets. In determining capital under the three standards, certain
adjustments are required to be made to stockholder's equity. The Bank was in
compliance with all three capital requirements as of December 31, 1993 and all
prior years. A reconciliation of stockholder's equity, as shown in the
accompanying
 
                                       70
<PAGE>   75
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
Consolidated Statements of Financial Position, to the three capital standards
and the Bank's resulting ratios are set forth in the table below (thousands of
dollars):
 
<TABLE>
<CAPTION>
                                      DECEMBER 31, 1993                      DECEMBER 31, 1992
                             ------------------------------------   ------------------------------------
                              TANGIBLE       CORE      RISK-BASED    TANGIBLE       CORE      RISK-BASED
                             ----------   ----------   ----------   ----------   ----------   ----------
<S>                          <C>          <C>          <C>          <C>          <C>          <C>
Stockholder's equity.......  $  176,943   $  176,943    $176,943    $  161,586   $  161,586   $  161,586
Capital adjustments:
  Nonsupervisory
     goodwill..............     (42,464)     (42,464)    (42,464)      (50,570)     (50,570)     (50,570)
  Supervisory goodwill.....     (27,037)     (14,422)    (14,422)      (28,809)      (7,227)      (7,227)
  Real estate
     investments...........          --           --        (478)         (593)        (593)      (1,246)
  General loan loss
     reserves..............          --           --      11,008            --           --       12,572
                             ----------   ----------   ----------   ----------   ----------   ----------
Regulatory capital.........     107,442      120,057     130,587        81,614      103,196      115,115
Minimum required capital...      25,229       50,459      70,031        32,375       64,749       80,088
                             ----------   ----------   ----------   ----------   ----------   ----------
Excess.....................  $   82,213   $   69,598    $ 60,556    $   49,239   $   38,447   $   35,027
                             ----------   ----------   ----------   ----------   ----------   ----------
                             ----------   ----------   ----------   ----------   ----------   ----------
Regulatory capital ratio...        6.39%        7.14%      14.92%         3.78%        4.78%       11.50%
Minimum required ratio.....        1.50         3.00        8.00          1.50         3.00         8.00
                             ----------   ----------   ----------   ----------   ----------   ----------
Excess.....................        4.89%        4.14%       6.92%         2.28%        1.78%        3.50%
                             ----------   ----------   ----------   ----------   ----------   ----------
                             ----------   ----------   ----------   ----------   ----------   ----------
Asset base.................  $1,681,952   $1,681,952    $875,336    $2,158,313   $2,158,313   $1,001,094
                             ----------   ----------   ----------   ----------   ----------   ----------
                             ----------   ----------   ----------   ----------   ----------   ----------
</TABLE>
 
     The regulatory capital standards contain certain phase-in requirements
concerning the amount of supervisory goodwill which is includable in core and
risk-based capital as well as the amount of real estate investments which are
required to be deducted from capital under all three standards. On January 1,
1994, the maximum supervisory goodwill includable in risk-based and core capital
is limited to .375 percent of tangible assets. Based upon this limitation, the
Bank's risk-based and core capital levels declined by $6.3 million on January 1,
1994.
 
     The improvement in the Bank's capital ratios over prior year-end is
principally the result of the Bank's net earnings, implementation of SFAS No.
115, lower asset base, and reduced level of goodwill. At December 31, 1993,
under fully phased-in capital rules applicable at July 1, 1996, the Bank would
have exceeded its fully phased-in tangible, core and risk-based capital
requirements by $81.8 million, $56.6 million and $43.1 million, respectively.
 
     The OTS has issued a regulation which will add a component to an
institution's risk-based capital calculation in 1994. The regulation will
require a reduction of an institution's risk-based capital by 50 percent of the
decline in the institution's net portfolio value exceeding two percent of assets
under a hypothetical 200 basis point increase or decrease in market interest
rates. Based upon management's estimate of its interest rate risk exposure, the
Bank will not be subjected to a reduction of its risk-based capital using data
as of December 31, 1993.
 
     FDICIA required the federal banking agencies to adopt regulations
implementing a system of progressive constraints as capital levels decline at
banks and savings institutions. The federal banking agencies have enacted
uniform "prompt corrective action" rules which classify banks and savings
institutions into one of five categories based upon capital adequacy, ranging
from "well capitalized" to "critically undercapitalized." As of December 31,
1993, the Bank is categorized as "well capitalized" under the regulation.
 
                                       71
<PAGE>   76
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- SUMMARIZED FINANCIAL STATEMENT DATA -- (CONTINUED)
OTHER REGULATORY MATTERS
 
     In conjunction with the acquisition of the Bank in 1986, the Company agreed
that as long as it controls the Bank, adequate capital as required by applicable
regulations, will be maintained at the Bank and if required, the Company will
infuse additional capital into the Bank to assure compliance with such
requirements. Even though the Bank met all existing regulatory capital
requirements, in October 1991, the Company committed to make an additional $20
million capital contribution to the Bank in order to further improve the Bank's
capital position. Under this commitment, the Company contributed $10 million to
the Bank in October 1991 and $10 million in February 1992, in exchange for
common stock of the Bank. The Company does not anticipate making future capital
contributions to the Bank.
 
     Pursuant to the acquisition of the Bank by the Company, the OTS stipulated
that dividends paid by the Bank to the Company could not exceed 50 percent of
the Bank's cumulative net income after the date of acquisition. Since the
acquisition, the Bank's cumulative net income is $29.5 million, resulting in
maximum dividends payable of $14.7 million as of December 31, 1993. Since the
acquisition, the Bank has paid the Company $1.8 million in capital
distributions, net of the $20 million of capital contributions received from the
Company.
 
     Capital distributions, including dividends, are also governed by an OTS
regulation which limits distributions by applying a tiered system based on
capital levels. Under the regulation, the Bank is restricted to paying no more
than 75 percent of its net income over the preceding four quarters to the
Company. The Bank did not pay any dividends to the Company during the last three
years.
 
     In October 1991, the Bank entered into a Supervisory Agreement (the
Agreement) with the OTS. Among other things, the Bank agreed to: retain
competent management, improve the review and monitoring of problem assets,
develop comprehensive business plans which support decisions concerning real
estate development projects and foreclosed real estate, and reduce interest rate
risk. In November 1993, the Agreement was terminated based upon corrective
action taken by the Bank.
 
                                       72
<PAGE>   77
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- DEBT SECURITIES
 
     Debt securities held to maturity are stated at amortized cost. The yields
are computed based upon amortized cost. The amortized cost, estimated fair
values and yields of debt securities held to maturity are as follows (thousands
of dollars):
 
<TABLE>
<CAPTION>
                                                              TOTAL        TOTAL      ESTIMATED
                                               AMORTIZED    UNREALIZED   UNREALIZED      FAIR
              DECEMBER 31, 1993                   COST        GAINS        LOSSES       VALUE      YIELD
- ---------------------------------------------  ----------   ----------   ----------   ----------   -----
<S>                                            <C>          <C>          <C>          <C>          <C>
Corporate issue MBS..........................  $   69,660    $    403      $1,325     $   68,738   6.85 %
                                               ----------   ----------   ----------   ----------   -----
          Total..............................  $   69,660    $    403      $1,325     $   68,738   6.85 %
                                               ----------   ----------   ----------   ----------   -----
                                               ----------   ----------   ----------   ----------   -----
DECEMBER 31, 1992
GNMA - MBS...................................  $   12,222    $    526      $   --     $   12,748   8.40 %
FHLMC - MBS..................................     629,225      12,076         257        641,044   6.00
FNMA - MBS...................................     217,391       1,578       1,403        217,566   7.44
CMO..........................................      37,722       1,915       1,934         37,703   5.06
Corporate issue MBS..........................     229,303       2,276       3,860        227,719   7.21
Money market instruments.....................         100          --          --            100   5.50
U.S. Treasury securities and obligations of
  U.S. Government corporations and
  agencies...................................      15,996         131          29         16,098   5.64
Medium-term notes............................      17,018         105          --         17,123   6.61
                                               ----------   ----------   ----------   ----------   -----
          Total..............................  $1,158,977    $ 18,607      $7,483     $1,170,101   6.51 %
                                               ----------   ----------   ----------   ----------   -----
                                               ----------   ----------   ----------   ----------   -----
</TABLE>
 
     The following schedule of the expected maturity of debt securities held to
maturity is based upon dealer prepayment expectations and historical prepayment
activity (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                     AFTER       AFTER        AFTER
                                                    ONE YEAR   FIVE YEARS   TEN YEARS
                                                      BUT         BUT          BUT
                                          WITHIN     WITHIN      WITHIN      WITHIN     AFTER      TOTAL
                                            ONE       FIVE        TEN        TWENTY     TWENTY   AMORTIZED
           DECEMBER 31, 1993               YEAR      YEARS       YEARS        YEARS     YEARS      COST
- ----------------------------------------  -------   --------   ----------   ---------   ------   ---------
<S>                                       <C>       <C>        <C>          <C>         <C>      <C>
Corporate issue MBS.....................  $14,702   $34,665     $ 15,931     $ 3,566     $796     $69,660
                                          -------   --------   ----------   ---------   ------   ---------
          Total.........................  $14,702   $34,665     $ 15,931     $ 3,566     $796     $69,660
                                          -------   --------   ----------   ---------   ------   ---------
                                          -------   --------   ----------   ---------   ------   ---------
</TABLE>
 
                                       73
<PAGE>   78
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- DEBT SECURITIES -- (CONTINUED)
     Debt securities available for sale are stated at fair value at December 31,
1993 and at the lower of cost or fair value at December 31, 1992. The yields are
computed based upon amortized cost. The amortized cost, estimated fair values
and yields of debt securities available for sale are as follows (thousands of
dollars):
 
<TABLE>
<CAPTION>
                                                                TOTAL        TOTAL      ESTIMATED
                                                  AMORTIZED   UNREALIZED   UNREALIZED     FAIR
               DECEMBER 31, 1993                    COST        GAINS        LOSSES       VALUE     YIELD
- ------------------------------------------------  ---------   ----------   ----------   ---------   -----
<S>                                               <C>         <C>          <C>          <C>         <C>
GNMA - MBS......................................  $   9,081    $    591      $   --     $   9,672   8.41 %
FHLMC - MBS.....................................    368,436      11,518         168       379,786   6.12
FNMA - MBS......................................    119,208       1,144         695       119,657   6.60
CMO.............................................     45,733       1,516          --        47,249   4.82
Corporate issue MBS.............................     24,644         159         697        24,106   5.81
Money market investments........................     10,036          --          --        10,036   3.37
U.S. Treasury securities and obligations of U.S.
  Government corporations and agencies..........      5,110         110          --         5,220   5.93
                                                  ---------   ----------   ----------   ---------   -----
          Total.................................  $ 582,248    $ 15,038      $1,560     $ 595,726   6.09 %
                                                  ---------   ----------   ----------   ---------   -----
                                                  ---------   ----------   ----------   ---------   -----
DECEMBER 31, 1992
GNMA - MBS......................................  $   6,780    $    144      $   --     $   6,924   7.80 %
                                                  ---------   ----------   ----------   ---------   -----
          Total.................................  $   6,780    $    144      $   --     $   6,924   7.80 %
                                                  ---------   ----------   ----------   ---------   -----
                                                  ---------   ----------   ----------   ---------   -----
</TABLE>
 
     The following schedule reflects the expected maturity of MBS and CMO and
the contractual maturity of all other debt securities available for sale. The
expected maturity of MBS and CMO are based upon dealer prepayment expectations
and historical prepayment activity (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                    AFTER       AFTER        AFTER
                                                   ONE YEAR   FIVE YEARS   TEN YEARS
                                                     BUT         BUT          BUT                 TOTAL
                                         WITHIN     WITHIN      WITHIN      WITHIN     AFTER    ESTIMATED
                                          ONE        FIVE        TEN        TWENTY     TWENTY     FAIR
          DECEMBER 31, 1993               YEAR      YEARS       YEARS        YEARS     YEARS      VALUE
- --------------------------------------  --------   --------   ----------   ---------   ------   ---------
<S>                                     <C>        <C>        <C>          <C>         <C>      <C>
GNMA - MBS............................  $  4,050   $  5,257    $    328     $    37     $ --    $   9,672
FHLMC - MBS...........................   120,630    221,834      27,475       9,558      289      379,786
FNMA - MBS............................    31,090     65,419      14,353       8,517      278      119,657
CMO...................................    18,535     28,446         240          28       --       47,249
Corporate issue MBS...................     6,880     13,320       3,473         414       19       24,106
Money market instruments..............    10,036         --          --          --       --       10,036
U.S. Treasury securities and
  obligations of U.S. Government
  corporations and agencies...........        --      5,220          --          --       --        5,220
                                        --------   --------   ----------   ---------   ------   ---------
          Total.......................  $191,221   $339,496    $ 45,869     $18,554     $586    $ 595,726
                                        --------   --------   ----------   ---------   ------   ---------
                                        --------   --------   ----------   ---------   ------   ---------
</TABLE>
 
                                       74
<PAGE>   79
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 4 -- LOANS RECEIVABLE
 
     Loans receivable held for investment, recorded at amortized cost, are
summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,
                                                                     ---------------------
                                                                       1993         1992
                                                                     --------     --------
    <S>                                                              <C>          <C>
    Loans collateralized by real estate:
      Conventional single-family residential.......................  $431,854     $383,372
      FHA and VA insured single-family residential.................    21,491       17,731
      Commercial mortgage..........................................   192,046      198,235
      Construction and land........................................    82,638       91,344
                                                                     --------     --------
                                                                      728,029      690,682
    Commercial secured (other than real estate)....................    25,443       30,137
    Commercial unsecured...........................................       354          384
    Consumer installment...........................................    93,431       42,444
    Consumer unsecured (including credit cards)....................     7,817       18,371
    Equity and property improvement loans..........................    21,061       16,712
    Deposit accounts...............................................     2,944        4,248
                                                                     --------     --------
                                                                      879,079      802,978
                                                                     --------     --------
    Undisbursed proceeds...........................................   (48,251)     (44,937)
    Allowance for estimated credit losses..........................   (16,251)     (17,228)
    Premiums (discounts)...........................................     3,270         (125)
    Deferred fees..................................................    (4,782)      (4,406)
    Accrued interest...............................................     4,214        4,586
                                                                     --------     --------
                                                                      (61,800)     (62,110)
                                                                     --------     --------
    Loans receivable held for investment...........................  $817,279     $740,868
                                                                     --------     --------
                                                                     --------     --------
</TABLE>
 
     Loans receivable held for sale, recorded at lower of aggregate cost or
market, are summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,
                                                                     ---------------------
                                                                       1993         1992
                                                                     --------     --------
    <S>                                                              <C>          <C>
    Loans collateralized by single-family residential real estate:
      Conventional.................................................  $  4,999     $ 12,604
      FHA and VA insured...........................................     3,560        6,939
                                                                     --------     --------
                                                                        8,559       19,543
    Credit cards...................................................    11,492           --
                                                                     --------     --------
    Loans receivable held for sale.................................  $ 20,051     $ 19,543
                                                                     --------     --------
                                                                     --------     --------
    Additional loan information:
      Average portfolio yield at end of year.......................      8.12%        9.07%
      Principal balance of loans serviced for others (including
         loans serviced for MBS owned by the Bank of $92,658 and
         $144,834).................................................  $476,835     $575,750
      Adjustable-rate real estate loans............................   233,133      247,567
      Outstanding commitments to originate loans...................    47,903       32,398
      Unused lines of credit.......................................    79,472       68,817
      Standby letters of credit....................................     1,004        1,700
</TABLE>
 
                                       75
<PAGE>   80
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 4 -- LOANS RECEIVABLE -- (CONTINUED)
     Outstanding commitments to originate loans represent agreements to
originate real estate secured loans to customers at specified rates of interest.
Commitments generally expire in 45 to 60 days and may require payment of a fee.
Some of the commitments are expected to expire without being drawn upon,
therefore the total commitments do not necessarily represent future cash
requirements.
 
     The Bank has designated portions of its portfolio of residential real
estate loans and credit card accounts as held for sale. These loans are carried
at the lower of aggregate cost, market or sales commitment price. In January
1994, the Bank sold its credit card portfolio held for sale and recognized a
gain of approximately $1.7 million.
 
     The Bank's loan approval process is intended to assess both: (i) the
borrower's ability to repay the loan by determining whether the borrower meets
the Bank's established underwriting criteria, and (ii) the adequacy of the
proposed security by determining whether the appraised value of the security
property is sufficient for the proposed loan.
 
     It is the general policy of the Bank not to make single-family residential
loans when the loan-to-value ratio exceeds 80 percent unless the loans are
insured by private mortgage insurance, FHA insurance or VA guarantee.
Construction loans and commercial/income property loans are generally
underwritten with a discounted loan-to-value ratio of less than 75 percent.
 
     Management considers the above mentioned factors when evaluating the
adequacy of the allowance for estimated credit losses.
 
     Many of the Bank's adjustable-rate loans contain limitations as to both the
amount the interest rate can change at each repricing date (periodic caps) and
the maximum rates the loan can be repriced to over the life of the loan
(lifetime caps). At December 31, 1993, periodic caps in the adjustable loan
portfolio ranged from .25 percent to eight percent. Lifetime caps ranged from
9.75 percent to 22 percent.
 
NOTE 5 -- REAL ESTATE
 
     Real estate held for sale or development includes the following (thousands
of dollars):
 
<TABLE>
<CAPTION>
                                                                           DECEMBER 31,
                                                                        ------------------
                                                                         1993       1992
                                                                        ------     -------
    <S>                                                                 <C>        <C>
    Real estate held for sale, development or investment..............  $>4,216    $ 3,011
    Investments in and loans to real estate ventures..................     807       1,466
                                                                        ------     -------
                                                                         5,023       4,477
    Allowance for estimated real estate losses........................    (935)     (1,463)
                                                                        ------     -------
                                                                        $4,088     $ 3,014
                                                                        ------     -------
                                                                        ------     -------
</TABLE>
 
     During the third quarter of 1993, the Bank designated two Arizona branch
facilities, not included as part of the sale to World, as real estate held for
sale, development or investment. These facilities, with a net book value of $3.4
million at December 31, 1993, were previously included in premises and
equipment.
 
     The net realizable value of the real estate held for sale or development is
dependent upon real estate values, the local economies, and real estate sales
activity. Management evaluates the adequacy of the allowance for estimated real
estate losses by incorporating these factors.
 
                                       76
<PAGE>   81
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 5 -- REAL ESTATE -- (CONTINUED)
     Pretax loss from real estate operations, excluding interest income on loans
to real estate ventures, is summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,
                                                               ---------------------------------
                                                                1993         1992         1991
                                                               -------     --------     --------
<S>                                                            <C>         <C>          <C>
Gain on sale of real estate.................................   $   491     $  5,020     $  5,360
Less expenses allocated (1):
  General and administrative................................       330        1,077        1,551
  Interest..................................................        61          920        3,590
                                                               -------     --------     --------
                                                                   100        3,023          219
Provisions for estimated real estate losses.................    (1,010)     (18,309)     (50,696)
                                                               -------     --------     --------
Pretax loss from real estate operations.....................   $  (910)    $(15,286)    $(50,477)
                                                               -------     --------     --------
                                                               -------     --------     --------
</TABLE>
 
- ---------------
 
(1) Allocated general and administrative expenses include labor and other costs
    incurred in the Bank's real estate operations. Interest is allocated based
    upon the Bank's average cost of funds devoted to such operations.
 
     Summarized below is condensed financial information for the Bank's real
estate ventures (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                                   -------------------
                                                                    1993        1992
                                                                   ------     --------
        <S>                                                        <C>        <C>
        ASSETS:
          Cash..................................................   $1,606     $  1,722
          Development costs.....................................    1,142       34,134
          Other assets..........................................    1,490        2,893
                                                                   ------     --------
                                                                   $4,238     $ 38,749
                                                                   ------     --------
                                                                   ------     --------
        LIABILITIES:
          Loans from third parties..............................   $  483     $ 47,566
          Other liabilities.....................................    2,784       15,152
                                                                   ------     --------
                                                                    3,267       62,718
                                                                   ------     --------
        EQUITY:
          PriMerit Bank.........................................      807        1,466
          Other investors.......................................      164      (25,435)
                                                                   ------     --------
                                                                      971      (23,969)
                                                                   ------     --------
                                                                   $4,238     $ 38,749
                                                                   ------     --------
                                                                   ------     --------
</TABLE>
 
     Beginning in 1987, the Bank participated in a real estate development
project, Margarita Village Development Company (MVDC), as both lender and
investor, to develop and build a 468 acre restricted community in Temecula,
California. In December 1991, MVDC entered Chapter 11 bankruptcy proceedings.
Due to significant legal and economic uncertainties, the Bank charged off its
entire $32.2 million investment in and loan to MVDC in 1991. In 1993, an
agreement was reached whereby the Bank assigned its interests as lender to the
first trust deed holder and allowed the first trust deed holder to foreclose on
the real estate owned by MVDC. In exchange, the first trust deed holder assumed
certain liabilities of the Bank and MVDC, and the Bank received the right to
receive a portion of future proceeds from the development and sale of the real
estate. Management believes the Bank's ability to recover any of its advances to
MVDC will depend largely on
 
                                       77
<PAGE>   82
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 5 -- REAL ESTATE -- (CONTINUED)
favorable resolution of various pending legal uncertainties and the recovery of
the residential sector of the California real estate market.
 
NOTE 6 -- ALLOWANCES FOR ESTIMATED CREDIT LOSSES
 
     Activity in the allowances for losses on loans, real estate acquired
through foreclosure and real estate held for sale or development is summarized
as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                                    REAL          REAL
                                                                                   ESTATE        ESTATE
                                             CONSTRUCTION     NON-                ACQUIRED      HELD FOR
                                  MORTGAGE     AND LAND     MORTGAGE    TOTAL      THROUGH       SALE OR
                                   LOANS        LOANS        LOANS      LOANS    FORECLOSURE   DEVELOPMENT   OTHER    TOTAL
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
<S>                               <C>        <C>            <C>        <C>       <C>           <C>           <C>     <C>
Balance at 12/31/90.............  $ 1,134      $  1,299     $ 1,213    $ 3,646     $ 4,087      $   4,158    $ 539   $ 12,430
  Provisions for estimated
    losses......................    5,835         2,643       3,580     12,058       1,686         49,010       --     62,754
  Charge-offs, net of
    recovery....................     (394 )      (1,121)     (1,545 )   (3,060)     (6,595)       (49,529)     (62)   (59,246)
  Transfers.....................     (583 )          --          --       (583)        822             --     (239)        --
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/91.............    5,992         2,821       3,248     12,061          --          3,639      238     15,938
  Provisions for estimated
    losses......................    1,903         6,460       5,766     14,129          --         18,309       --     32,438
  Charge-offs, net of
    recovery....................     (515 )      (3,765)     (4,682 )   (8,962)         --        (20,485)      --    (29,447)
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/92.............    7,380         5,516       4,332     17,228          --          1,463      238     18,929
  Provisions for estimated
    losses......................    4,634           172       1,406      6,212          --          1,010       --      7,222
  Charge-offs, net of
    recovery....................   (3,191 )      (2,248)     (1,750 )   (7,189)         --         (1,538)      --     (8,727)
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
Balance at 12/31/93.............  $ 8,823      $  3,440     $ 3,988    $16,251     $    --      $     935    $ 238   $ 17,424
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
                                  --------   ------------   --------   -------   -----------   -----------   -----   --------
</TABLE>
 
     The Bank establishes allowances for estimated losses by portfolio through
charges to expense. On a regular basis, management reviews the level of loss
allowances which have been provided against the portfolios. Adjustments are made
thereto in light of the level of problem loans and current economic conditions.
Included in net charge-offs are $1.4 million, $1.9 million and $2.6 million of
recoveries for 1991, 1992 and 1993, respectively.
 
     Prior to the fourth quarter of 1991, the Bank established specific
valuation allowances for identified probable losses on assets in its portfolio.
During the fourth quarter of 1991, the Bank adopted a policy of charging off
portions of these assets against the previously established specific valuation
allowances and directly charging off any newly identified probable losses on
specific assets, thus directly reducing the carrying value of the asset.
Write-downs to fair value, disposition gains and losses, and operating income
and costs affiliated with real estate acquired through foreclosure are charged
to the allowance for estimated credit losses.
 
                                       78
<PAGE>   83
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 7 -- DEPOSITS
 
     Deposits are summarized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                    DECEMBER 31,
                                                              -------------------------
                                                                 1993           1992
                                                              ----------     ----------
        <S>                                                   <C>            <C>
        Interest-bearing demand and money market deposits...  $  324,011     $  294,900
        Noninterest-bearing demand deposits.................      64,797         87,986
        Savings deposits....................................      86,781         79,151
                                                              ----------     ----------
                  Total transaction accounts................     475,589        462,037
                                                              ----------     ----------
        Certificates of deposit:
           ** $100,000......................................     580,018        936,718
            * $100,000......................................     152,245        223,409
                                                              ----------     ----------
                  Total certificates of deposit.............     732,263      1,160,127
                                                              ----------     ----------
                                                              $1,207,852     $1,622,164
                                                              ----------     ----------
                                                              ----------     ----------
        Average annual interest rate at end of year.........        3.56%          4.49%
                                                              ----------     ----------
                                                              ----------     ----------
 * Greater than or equal to.
** Less than.
</TABLE>
 
     The above balance includes $5.8 million deposited by the State of Nevada
that is collateralized by real estate loans and debt securities with a fair
value of approximately $8.8 million at December 31, 1993. Certificates of
deposit include approximately $6.9 million of brokered deposits at December 31,
1992. At December 31, 1993, there were no brokered deposits.
 
     Certificates of deposit maturity schedule (thousands of dollars):
 
<TABLE>
<CAPTION>
                                          CERTIFICATES MATURING ON OR PRIOR TO DECEMBER 31,
                                    --------------------------------------------------------------
                                      1994       1995      1996      1997      1998     THEREAFTER
                                    --------   --------   -------   -------   -------   ----------
    <S>                             <C>        <C>        <C>       <C>       <C>       <C>
    Interest Rate Category
    2.99% and lower...............  $ 66,243   $     25   $    32   $    --   $    16    $      5
    3.00% to 3.99%................   341,867     25,448       472        --        --          20
    4.00% to 4.99%................    20,111     40,303    10,778       793     2,079           5
    5.00% to 5.99%................     9,419      4,852    21,120     9,647    21,179       7,143
    6.00% to 6.99%................     2,552        594     2,718    26,081       434       5,093
    7.00% to 7.99%................     7,269      2,350    33,081     5,690        13      14,461
    8.00% to 8.99%................     7,267     30,914        74        --        --         123
    9.00% and over................    11,461        102        --        30       399          --
                                    --------   --------   -------   -------   -------   ----------
                                    $466,189   $104,588   $68,275   $42,241   $24,120    $ 26,850
                                    --------   --------   -------   -------   -------   ----------
                                    --------   --------   -------   -------   -------   ----------
</TABLE>
 
NOTE 8 -- CASH EQUIVALENTS AND SECURITIES SOLD UNDER REPURCHASE AGREEMENTS
 
  Cash Equivalents
 
     Cash equivalents are stated at cost, which approximates fair value, and
include the following (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,
                                                                     ---------------------
                                                                      1993          1992
                                                                     -------       -------
    <S>                                                              <C>           <C>
    Securities purchased under resale agreements...................  $55,102       $66,000
    Federal funds sold.............................................    8,401        13,000
                                                                     -------       -------
                                                                     $63,503       $79,000
                                                                     -------       -------
                                                                     -------       -------
</TABLE>
                                        79
<PAGE>   84
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 8 -- CASH EQUIVALENTS AND SECURITIES SOLD UNDER REPURCHASE
AGREEMENTS -- (CONTINUED)
     Securities purchased under resale agreements of $55.1 million at December
31, 1993 and $66 million at December 31, 1992 matured within 24 days and 25
days, respectively, and called for delivery of the same securities. The
collateral for these agreements consisted of debt securities which at December
31, 1993 and 1992 were held on the Bank's behalf by its safekeeping agents and
safekeeping agents for various investment bankers. The securities purchased
under resale agreements represented 31 percent of the Bank's stockholder's
equity at December 31, 1993 and 41 percent at December 31, 1992.
 
     The average amount of securities purchased under resale agreements
outstanding during the years ended December 31, 1993 and 1992 were $26.6 million
and $20.2 million, respectively. The maximum amount of resale agreements
outstanding at any month end was $60 million during 1993 and $120 million during
1992.
 
  Securities Sold Under Repurchase Agreements
 
     The Bank sells securities under agreements to repurchase (reverse
repurchase agreements). Reverse repurchase agreements are treated as borrowings
and are reflected as liabilities in the accompanying Consolidated Statements of
Financial Position. Reverse repurchase agreements are summarized as follows
(thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                                   -----------------------
                                                                     1993           1992
                                                                   --------       --------
    <S>                                                            <C>            <C>
    Balance at year end..........................................  $259,041       $376,859
    Accrued interest payable at year end.........................     3,871          3,717
    Daily average amount outstanding during year.................   305,123        204,222
    Maximum amount outstanding at any month end..................   367,859        376,859
    Weighted average interest rate during the year...............      4.30%          5.98%
    Weighted average interest rate on year end balances..........      4.31           4.54
</TABLE>
 
     The Bank transacted $210 million in reverse repurchase agreements with
Morgan Stanley & Co., Incorporated (primary dealer) in accordance with a
long-term agreement. The agreement, which allows for a maximum borrowing of $400
million with no minimum, matures in July 1997. The interest rate on the
borrowings is adjusted monthly based upon a spread over or under the one month
London Interbank Offering Rate (LIBOR), dependent upon the underlying
collateral.
 
     The Bank is also party to three separate flexible reverse repurchase
agreements (flex repos) totaling $49 million at December 31, 1993. A flex repo
represents a long-term fixed-rate contract to borrow funds through the primary
dealer, collateralized by MBS with a flexible repayment schedule. The principal
balance of the Bank's flex repo agreements will decline over the stated maturity
period based upon the counterparty's need for the funds.
 
     Principal payments on flex repos at December 31, 1993 are projected as
follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                          FLEX         FLEX            FLEX
                  PROJECTED REPAYMENT                    REPO-1       REPO-2          REPO-3
    ------------------------------------------------     ------       -------         ------
    <S>                                                  <C>          <C>             <C>
    12 months.......................................     $   --       $12,000         $7,000
    24 months.......................................      1,000        25,602             --
    36 months.......................................      3,439            --             --
                                                         ------       -------         ------
                                                         $4,439       $37,602         $7,000
                                                         ------       -------         ------
                                                         ------       -------         ------
    Maturity date...................................  July 1996     June 1995     April 1994
    Interest rate...................................       8.86%         8.65%          8.33%
</TABLE>
 
                                       80
<PAGE>   85
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 8 -- CASH EQUIVALENTS AND SECURITIES SOLD UNDER REPURCHASE
AGREEMENTS -- (CONTINUED)
     Actual principal payments may differ from those shown above due to the
actual timing of the funding being faster or slower than originally projected.
 
     All agreements are collateralized by MBS and require the Bank to repurchase
identical securities as those which were sold. The MBS collateralizing the
agreements are reflected as assets with a carrying value of $18.1 million in
excess of borrowing amount and a weighted average maturity of 3.12 years. All
agreements were transacted with the primary dealer. Reverse repurchase
agreements are collateralized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                         ------------------------------------
                                                            1993                1992
                                                         ----------     ---------------------
                                                         BOOK/FAIR        BOOK         FAIR
                                                           VALUE         VALUE        VALUE
                                                         ----------     --------     --------
    <S>                                                  <C>            <C>          <C>
    MBS, including accrued interest of $2,620
      and $3,574.......................................   $280,968      $399,955     $406,429
</TABLE>
 
     The Bank has entered into interest rate swap agreements as the fixed-rate
payer to reduce the Bank's exposure to changes in interest rates. At December
31, 1993, the Bank was party to one interest rate swap agreement with a
nationally recognized investment banking firm, having a total notional amount of
$7.5 million with a remaining term of seven years. The agreement requires the
Bank to make fixed-rate interest payments of 5.45 percent and in turn, the Bank
receives floating interest payments based on the six month LIBOR, 3.55 percent
at December 31, 1993. The interest rate swap agreement at December 31, 1993 is
collateralized with MBS with a fair value of $254,000. During 1992, in
conjunction with the restructuring of the Bank's balance sheet, through sale of
long-term fixed-rate assets, $300 million (notional amount) of interest rate
swaps hedging such assets were cancelled at a cost of $14.1 million, which is
included as an expense in the accompanying Consolidated Statements of Income. In
addition, $35 million (notional amount) of interest rate swaps matured during
1992. At December 31, 1992 no agreements were outstanding. The net expense on
interest rate swaps of $24,000, $4.8 million, and $3.2 million in 1993, 1992 and
1991, respectively, was included in interest expense as a cost of hedging
activities in the accompanying Consolidated Statements of Income.
 
     During 1991 the Bank was party to two interest rate collars with nationally
recognized investment banking firms, having a total notional principal amount of
$400 million used to reduce the Bank's exposure to changes in interest rates.
During 1991, the cost of such collars of $3.5 million was included in interest
expense as a cost of hedging activities in the accompanying Consolidated
Statements of Income. There were no interest rate collars outstanding during
1993 and 1992.
 
NOTE 9 -- COMMITMENTS AND CONTINGENCIES
 
     Construction Program -- Capital expenditures for the year ending December
31, 1994 are estimated at $119 million.
 
     Leases and Rentals -- The Company leases a portion of its corporate
headquarters office complex in Las Vegas and the LNG facilities on its northern
Nevada system. The leases provide for initial terms which expire in 1997 and
2003, respectively, with optional renewal terms available at the expiration
dates. The rental payments are $3.1 million annually, and $10.8 million in the
aggregate over the remaining initial term for the Las Vegas facility, and $6.7
million annually and $63.3 million in the aggregate for the LNG facilities.
 
     Rentals included in operating expenses with respect to these leases
amounted to $9.8 million in each of the three years in the period ended December
31, 1993. Both of these leases are accounted for as operating
 
                                       81
<PAGE>   86
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 9 -- COMMITMENTS AND CONTINGENCIES (CONTINUED)
leases and are treated as such for regulatory purposes. Other operating leases
of the Company are immaterial individually and in the aggregate.
 
     The Bank leases certain of its facilities under noncancelable operating
lease agreements. The more significant of these leases expire between 1994 and
2029 and provide for renewals subject to certain escalation clauses. Net rental
expense for the Bank was $3.1 million in 1993, $3 million in 1992 and $2.5
million in 1991.
 
     The following is a schedule of net future minimum rental payments for the
Bank under various operating lease agreements that have initial or remaining
noncancelable lease terms in excess of one year as of December 31, 1993
(thousands of dollars):
 
<TABLE>
<CAPTION>
                                                             TOTAL        TOTAL         NET
                                                            MINIMUM      MINIMUM      MINIMUM
                                                             LEASE       SUBLEASE      LEASE
                                                           PAYMENTS      RECEIPTS    PAYMENTS
                                                           ---------     -------     ---------
    <S>                                                    <C>           <C>         <C>
    Year Ending December 31:
      1994...............................................   $ 5,087      $1,930       $ 3,157
      1995...............................................     5,026       1,415         3,611
      1996...............................................     4,988       1,296         3,692
      1997...............................................     4,950       1,042         3,908
      1998...............................................     4,602         880         3,722
      Thereafter.........................................    50,577       1,528        49,049
                                                           ---------     -------     ---------
                                                            $75,230      $8,091       $67,139
                                                           ---------     -------     ---------
                                                           ---------     -------     ---------
</TABLE>
 
     Legal Proceedings -- The Company has been named as defendant in various
legal proceedings. The ultimate dispositions of these proceedings are not
presently determinable; however, it is the opinion of management that no
litigation to which the Company is subject will have a material adverse impact
on its financial position or results of operations.
 
NOTE 10 -- SHORT-TERM DEBT
 
     The Company has agreements with several banks for committed credit lines
which aggregate $110 million at December 31, 1993. The agreements provide for
the payment of interest at competitive market rates. The lines of credit also
require the payments of facility fees based on the long-term debt rating of the
Company. The committed credit lines have no compensating balance requirements
and expire in July 1994. At December 31, 1993, $86 million of short-term
borrowings were outstanding.
 
                                       82
<PAGE>   87
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 11 -- LONG-TERM DEBT
 
<TABLE>
<CAPTION>
                                                                    DECEMBER 31,
                                                  -------------------------------------------------
                                                    1993          1993         1992          1992
                                                  CARRYING       MARKET      CARRYING       MARKET
                                                   AMOUNT        VALUE        AMOUNT        VALUE
                                                  ---------     --------     ---------     --------
                                                               (THOUSANDS OF DOLLARS)
<S>                                               <C>           <C>          <C>           <C>
Southwest Gas Corporation Debentures --
  9% Series A, due 2011.........................  $  27,688     $ 28,795     $  28,977     $ 27,466
  9% Series B, due 2011.........................     31,944       33,222        33,121       31,392
  8 3/4% Series C, due 2011.....................     19,699       20,487        20,623       19,101
  9 3/8% Series D, due 2017.....................    120,000      126,826       120,000      116,352
  10% Series E, due 2013........................     23,127       24,283        23,129       23,945
  9 3/4% Series F, due 2002.....................    100,000      116,596       100,000      104,310
  Unamortized discount..........................     (7,220)          --        (7,704)          --
                                                  ---------     --------     ---------     --------
                                                    315,238      350,209       318,146      322,566
                                                  ---------     --------     ---------     --------
Term loan facilities............................    165,000                    165,000
                                                  ---------                  ---------
Industrial development revenue bonds --
  Variable rate bonds
     Series due 2028............................     50,000       50,000            --           --
     Less funds held in trust...................    (44,055)          --            --           --
                                                  ---------
                                                      5,945
                                                  ---------
  Fixed-rate bonds
     7.30% 1992 Series A, due 2027..............     30,000       33,450        30,000       30,703
     7.50% 1992 Series B, due 2032..............    100,000      112,000       100,000      102,000
     6.50% 1993 Series A, due 2033..............     75,000       79,500            --           --
     Unamortized discount.......................     (3,969)          --        (2,450)          --
     Less funds held in trust...................    (73,614)          --       (15,968)          --
                                                  ---------                  ---------
                                                    127,417                    111,582
                                                  ---------                  ---------
Other...........................................         --           --           155           --
                                                  ---------                  ---------
                                                    613,600                    594,883
                                                  ---------                  ---------
PriMerit Bank
  Advances from FHLB............................     71,000       71,281        16,000       16,563
  Notes payable.................................      8,265        8,647        18,640       19,219
  Unsecured senior notes........................         --           --        25,000       25,525
                                                  ---------                  ---------
                                                     79,265                     59,640
                                                  ---------                  ---------
                                                  $ 692,865                  $ 654,523
                                                  ---------                  ---------
                                                  ---------                  ---------
</TABLE>
 
     In December 1993, the Company borrowed $75 million in Clark County, Nevada,
tax-exempt IDRB. The IDRB have an annual coupon rate of 6.50 percent, are
noncallable for 10 years and have a final maturity in December 2033. The
proceeds from the sale of the IDRB will be used to finance certain additions and
improvements to the Company's natural gas distribution and transmission system
in Clark County, Nevada.
 
     In December 1993, the Company borrowed $50 million in City of Big Bear
Lake, California, tax-exempt IDRB. The IDRB bear interest at a variable rate and
have a final maturity in December 2028. The interest rate as of December 31,
1993 was 3.15 percent. The proceeds from the sale of the IDRB will be used to
 
                                       83
<PAGE>   88
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 11 -- LONG-TERM DEBT -- (CONTINUED)
finance certain additions and improvements to the Company's natural gas
distribution and transmission system in San Bernardino County, California.
 
     The Company has two term loan facilities totaling $165 million. The fair
value of these term loan facilities approximates carrying value. The first term
loan facility is a Restated and Amended Credit Agreement dated April 1990 in the
amount of $125 million which provides for a revolving period through April 1995
at which time any amounts borrowed under the agreement become payable on demand.
Direct borrowing options provide for the payment of interest at either the prime
rate, LIBOR, or a certificate of deposit rate plus a margin based on the
Company's credit rating. In addition to direct borrowing options, a letter of
credit is available to provide credit support for the issuance of commercial
paper. At December 31, 1993 and 1992, there was $125 million of commercial paper
outstanding. During 1993 and 1992, the average cost of this facility was 3.89
percent and 4.45 percent, respectively.
 
     The second term loan facility is an Amended and Restated Domestic Credit
Agreement dated December 1986 in the original amount of $80 million with a final
maturity in December 1994. The first $40 million principal payment was made in
June 1992. The final principal payment is due at maturity. The agreement
provides for the payment of interest at either the prime rate, a certificate of
deposit based rate, or a LIBOR based rate, and the payment of a commitment fee
equal to 3/8 of one percent of the unused portion of the commitment. During 1993
and 1992, the average interest rates were 3.80 percent and 4.84 percent,
respectively.
 
     Market values for long-term debt of the Company, excluding the Bank, were
determined based on dealer quotes using trading records for December 31, 1993
and 1992, as applicable, and other secondary sources which are customarily
consulted for data of this kind. The carrying value of the IDRB Series due 2028
was used as the estimate of fair value based upon the variable interest rate of
the bonds.
 
     Requirements to retire long-term debt, excluding those of the Bank, at
December 31, 1993 for the next five years are expected to be $45 million, $130
million, $5 million, $5 million, and $11 million, respectively.
 
     Principal payments on Bank borrowings at December 31, 1993 are due as
follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                        INTEREST       ADVANCES       NOTES
                        MATURITY                          RATE         FROM FHLB     PAYABLE
    -------------------------------------------------  -----------     ---------     -------
    <S>                                                <C>             <C>           <C>
    12 months........................................        8.00%      $    --      $   130
    24 months........................................   4.30%-8.20       50,000          140
    36 months........................................   4.40 -8.50       10,000        7,995
    48 months........................................         8.23        6,000           --
    60 months........................................         5.01        5,000           --
                                                                       ---------     -------
                                                                        $71,000      $ 8,265
                                                                       ---------     -------
                                                                       ---------     -------
</TABLE>
 
     Coupon interest rates on Bank borrowings are as follows:
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                              ---------------------------
                                                                 1993            1992
                                                              -----------     -----------
    <S>                                                       <C>             <C>
    Advances from FHLB......................................  4.30%-8.23%     8.23%-9.21%
    Notes payable...........................................  8.00 -8.50      7.75 -8.50
    Unsecured senior notes..................................      --          9.93
</TABLE>
 
     The effective rate of the advances from the FHLB at December 31, 1993 was
4.70 percent.
 
                                       84
<PAGE>   89
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 11 -- LONG-TERM DEBT -- (CONTINUED)
     In 1992, the FHLB established a Financing Availability for the Bank which
is currently 20 percent of the Bank's assets with terms up to 120 months. All
borrowings from the FHLB must be collateralized by mortgages or securities. In
December 1993, the Bank obtained the capability of borrowing up to $5 million in
federal funds from Bank of America. At December 31, 1993, no funds had been
drawn from this line of credit which expires in August 1994.
 
     Bank borrowings are collateralized as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                    -----------------------------------------
                                                           1993                   1992
                                                    -------------------     -----------------
                                                      BOOK       FAIR        BOOK      FAIR
                                                     VALUE      VALUE        VALUE     VALUE
                                                    --------   --------     -------   -------
    <S>                                             <C>        <C>          <C>       <C>
    MBS...........................................  $ 14,797   $ 14,797     $30,172   $31,476
    Real estate loans.............................    98,860     71,000      22,238    16,000
    FHLB stock....................................    16,501     16,501      16,953    16,953
                                                    --------   --------     -------   -------
                                                    $130,158   $102,298     $69,363   $64,429
                                                    --------   --------     -------   -------
                                                    --------   --------     -------   -------
</TABLE>
 
NOTE 12 -- PREFERRED AND PREFERENCE STOCKS
 
<TABLE>
<CAPTION>
                                                    CUMULATIVE
                                                    PREFERRED          SECOND PREFERENCE STOCK
                                                      STOCK        -------------------------------
                                                       9.5%         FIRST      SECOND       THIRD
                                                      SERIES       SERIES      SERIES      SERIES
                                                    ----------     -------     -------     -------
<S>                                                 <C>            <C>         <C>         <C>
NUMBER OF SHARES (In thousands):
  Balance, December 31, 1990......................        72            30          66         130
  Redemptions.....................................        (8)          (10)        (22)        (32)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1991......................        64            20          44          98
  Redemptions.....................................        (8)          (10)        (22)        (33)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1992......................        56            10          22          65
  Redemptions.....................................        (8)          (10)        (22)        (33)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1993......................        48            --          --          32
                                                    ----------     -------     -------     -------
                                                    ----------     -------     -------     -------
AMOUNT (In thousands):
  Balance, December 31, 1990......................    $7,200       $ 3,000     $ 6,600     $13,032
  Redemptions.....................................      (800)       (1,000)     (2,200)     (3,258)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1991......................     6,400         2,000       4,400       9,774
  Redemptions.....................................      (800)       (1,000)     (2,200)     (3,258)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1992......................     5,600         1,000       2,200       6,516
  Redemptions.....................................      (800)       (1,000)     (2,200)     (3,258)
                                                    ----------     -------     -------     -------
  Balance, December 31, 1993......................    $4,800       $    --     $    --     $ 3,258
                                                    ----------     -------     -------     -------
                                                    ----------     -------     -------     -------
</TABLE>
 
     The Company is authorized to issue up to 500,000 shares each of its
Cumulative Preferred and Second Preference Stock, respectively. The Company is
required to redeem 8,000 shares annually, through 1999, of the $100 Cumulative
Preferred Stock, 9.5 percent Series. The Company is required to redeem the
remaining 32,580 shares of its Second Preference Stock, Third Series, in 1994.
All outstanding Cumulative Preferred and Second Preference Stock shares are
redeemable by the Company at any time at par plus accrued dividends.
 
     Requirements for the next five years to redeem preferred and preference
stock outstanding at December 31, 1993 amount to $4.1 million in 1994, and
$800,000 in each year for 1995 through 1998.
 
                                       85
<PAGE>   90
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 12 -- PREFERRED AND PREFERENCE STOCKS -- (CONTINUED)
     The dividend rate on the Second Preference Stock is cumulative and varies
from three percent to 16 percent, based on a formula tied to operating results
with respect to the gas distribution system purchased from APS. During each of
the last three years, the dividend rate was three percent.
 
     The estimated fair value of the Company's Cumulative Preferred Stock at
December 31, 1993 and 1992 is $5 million and $5.6 million, respectively. These
figures are based on a yield-to-maturity of 8.14 percent and 9.53 percent,
respectively, and a required redemption of 8,000 shares per year. Since this
issue is not traded, yield-to-maturity was estimated based on the weighted
average yield-to-maturity of the Company's outstanding debentures, adjusted for
historical spreads between Moody's Baa rated utility debt, and Baa utility
preferred stock issues.
 
     The Company's Second Preference Stock is solely owned by APS, and is not
publicly traded. These issues have a final redemption, at par, in December 1994,
and they can be redeemed at par on any quarterly interest payment date. Due to
the unique nature of these issues, no ready market exists to trade the
securities. Consequently, for purposes of valuation, fair value is estimated to
approximate book value.
 
     The Articles of Incorporation provide that in the event of involuntary
liquidation, (i) before distributions may be made to holders of any other class
of stock, holders of the Cumulative Preferred Stock are entitled to payment at
par value, together with any accumulated and unpaid dividends, and (ii) before
distributions may be made to holders of common stock, the holder of the Second
Preference Stock is entitled to payment at par value, together with any
accumulated and unpaid dividends.
 
NOTE 13 -- EMPLOYEE POSTRETIREMENT BENEFITS
 
     The Company has separate retirement plans covering the employees of its
natural gas operations and financial services segments. Both plans are
noncontributory with defined benefits, and cover substantially all employees. It
is the Company's policy to fund the plans at not less than the minimum required
contribution nor more than the tax deductible limit. Plan assets consist of
investments in common stock, corporate bonds, government obligations, real
estate, an insurance company contract and cash or cash equivalents.
 
     The plan covering the natural gas operations provides that an employee may
earn benefits for a period of up to 30 years and will be vested after 5 years of
service. Retirement plan costs were $6.6 million, $6.1 million and $5.5 million,
respectively, for each of the three years ended December 31, 1993, 1992 and
1991, respectively.
 
                                       86
<PAGE>   91
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 13 -- EMPLOYEE POSTRETIREMENT BENEFITS -- (CONTINUED)
     The following table sets forth, for the gas segment, the plan's funded
status and amounts recognized on the Company's consolidated statements of
financial position and statements of income. The cost and liability of the
financial services plan are not significant.
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                                   -----------------------
                                                                     1993          1992
                                                                   ---------     ---------
                                                                   (THOUSANDS OF DOLLARS)
    <S>                                                            <C>           <C>
    Actuarial present value of benefit obligations:
    Accumulated benefit obligation, including vested benefits
      of $(90,267) and $(65,379), respectively...................  $ (98,926)    $ (76,306)
                                                                   ---------     ---------
                                                                   ---------     ---------
    Projected benefit obligation for service rendered to date....  $(141,694)    $(113,180)
    Market value of plan assets..................................    126,433       114,272
                                                                   ---------     ---------
                                                                     (15,261)        1,092
    Unrecognized net transition obligation being amortized
      through 2004...............................................      8,326         9,163
    Unrecognized net loss (gain).................................      6,389       (10,339)
    Unrecognized prior service cost..............................        903           809
                                                                   ---------     ---------
    Prepaid retirement plan asset included in the
      Consolidated Statements of Financial Position..............  $     357     $     725
                                                                   ---------     ---------
                                                                   ---------     ---------
    Assumptions used to develop pension obligations were:
      Discount rate..............................................       7.25%         8.25%
      Long-term rate of return on assets.........................       8.75          8.75
      Rate of increase in compensation levels....................       4.75          5.25
</TABLE>
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                           --------------------------------
                                                            1993        1992         1991
                                                           -------     -------     --------
                                                                (THOUSANDS OF DOLLARS)
    <S>                                                    <C>         <C>         <C>
    Net retirement plan costs include the following
      components:
      Service cost.......................................  $ 6,339     $ 5,111     $  4,510
      Interest cost......................................    9,213       8,585        7,745
      Actual return on plan assets.......................   (8,853)     (6,406)     (19,312)
      Net amortization and deferrals.....................      (67)     (1,174)      12,515
                                                           -------     -------     --------
    Net periodic retirement plan cost....................  $ 6,632     $ 6,116     $  5,458
                                                           -------     -------     --------
                                                           -------     -------     --------
</TABLE>
 
     In addition to the basic retirement plans, the Company has separate
unfunded supplemental retirement plans for its natural gas operations and
financial services segments, which are limited to certain officers. The gas
segment's plan is noncontributory with defined benefits. Senior officers who
retire with ten years or more of service with the Company are eligible to
receive benefits. Other officers who retire with 20 years or more of service
with the Company are eligible to receive benefits. Plan costs were $1.5 million,
$1.5 million and $1.1 million for each of the three years ended December 31,
1993, 1992 and 1991, respectively. The accumulated benefit obligation of the
plan was $13.9 million, including vested benefits of $12.7 million, at December
31, 1993. The cost and liability of the financial services supplemental
retirement plan are not significant. The Company also has an unfunded retirement
plan for directors not covered by the employee retirement plan. The cost and
liability for this plan are not significant.
 
     The Company has a deferred compensation plan for all officers and members
of the Board. The plan provides the opportunity to defer from a minimum of
$2,000 up to 50 percent of annual compensation. The Company matches one-half of
amounts deferred up to six percent of an officer's annual salary. Payments of
compensation deferred, plus interest, commence upon the participant's retirement
in equal monthly
 
                                       87
<PAGE>   92
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 13 -- EMPLOYEE POSTRETIREMENT BENEFITS -- (CONTINUED)
installments over 10, 15 or 20 years, as determined by the Company. Deferred
compensation earns interest at a rate determined each January. The interest rate
represents 150 percent of Moody's Seasoned Corporate Bond Index.
 
     The Employees' Investment Plan (401k) provides for purchases of the
Company's common stock or certain other investments by eligible gas segment
employees through deductions of up to 16 percent of base compensation, subject
to IRS limitations. The Company matches one-half of amounts deferred up to six
percent of an employee's annual compensation. The cost of the plan was $1.9
million, $1.7 million and $1.6 million for each of the three years ended
December 31, 1993, 1992 and 1991, respectively. The Bank has a separate 401k
plan which provides for purchases of certain securities by eligible employees
through deductions of up to ten percent of base compensation, subject to IRS
limitations. The Bank matches one-half of amounts deferred up to six percent of
employee base compensation. The cost of this plan is not significant.
 
     At December 31, 1993, 748,448 common shares were reserved for issuance
under provisions of the Employee Investment Plan and the Company's Dividend
Reinvestment and Stock Purchase Plan. During 1993, the Company purchased shares
of common stock in the open market and issued original common shares to meet the
requirements of these plans.
 
     The Company provides postretirement benefits other than pensions (PBOP) to
its qualified gas segment retirees for health care, dental and life insurance.
The Bank does not provide PBOP to its retirees. In December 1990, the FASB
issued SFAS No. 106, "Employers' Accounting for Postretirement Benefits Other
Than Pensions." The statement requires the Company to account for PBOP on an
accrual basis rather than reporting these benefits on a pay-as-you-go basis. The
Company adopted SFAS No. 106 in January 1993. The PSCN, CPUC and FERC have
approved the use of SFAS No. 106 for ratemaking purposes, subject to certain
conditions, including funding. The Company did not receive approval to recover
PBOP costs on an accrual basis in its Arizona rate jurisdictions, but was
authorized to continue to recover the pay-as-you-go costs for ratemaking
purposes. The Company plans to begin funding the non-Arizona portion of the PBOP
liability in 1994.
 
     The following table sets forth, for the gas segment, the PBOP funded status
and amounts recognized on the Company's consolidated statements of financial
position and statements of income.
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31, 1993
                                                                   -----------------------
                                                                   (THOUSANDS OF DOLLARS)
        <S>                                                        <C>
        Accumulated postretirement benefit obligation
          Retirees...............................................         $ (14,035)
          Fully eligible actives.................................            (1,649)
          Other active participants..............................            (5,164)
                                                                        -----------
                  Total..........................................           (20,848)
        Plan assets..............................................                --
        Unrecognized transition obligation.......................            16,472
        Unrecognized prior service cost..........................                --
        Unrecognized loss........................................             2,659
                                                                        -----------
        Accrued postretirement benefit liability.................         $  (1,717)
                                                                        -----------
                                                                        -----------
</TABLE>
 
     Assumptions used to develop postretirement benefit obligations were:
 
<TABLE>
        <S>                                                         <C>
        Discount rate.............................................              7.25%
        Medical inflation.........................................   12% graded to 5%
        Salary increases..........................................              4.75%
</TABLE>
 
                                       88
<PAGE>   93
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 13 -- EMPLOYEE POSTRETIREMENT BENEFITS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                          YEAR ENDED
                                                                      DECEMBER 31, 1993
                                                                   ------------------------
                                                                    (THOUSANDS OF DOLLARS)
        <S>                                                        <C>
        Net periodic postretirement benefit costs
          include the following components:
             Service cost........................................           $  346
             Interest cost.......................................            1,394
             Actual return on plan assets........................               --
             Net amortization and deferrals......................              867
                                                                           -------
        Net periodic postretirement benefit cost.................           $2,607
                                                                           -------
                                                                           -------
</TABLE>
 
     The Company makes fixed contributions, based on age and years of service,
to retiree spending accounts for the medical and dental costs of employees who
retire after 1988. The Company pays up to 100 percent of the medical coverage
costs for employees who retired prior to 1989. The medical inflation assumption
in the table above applies to the benefit obligations for pre-1989 retirees
only. This inflation assumption was estimated at 12 percent for 1993 and
decreases one percent per year until 1997 and one-half of one percent per year
until 2003, at which time the annual increase is projected to be five percent. A
one percent increase in these assumptions would change the accumulated
postretirement benefit obligation by approximately $1.1 million and the 1994
annual benefit cost by approximately $160,000.
 
NOTE 14 -- INCOME TAXES
 
     Effective January 1993, the Company adopted SFAS No. 109, "Accounting for
Income Taxes." The statement requires the use of the asset and liability
approach for financial reporting of income taxes. As permitted under SFAS No.
109, prior years' financial statements have not been restated. The cumulative
effect of adopting this statement was an increase in net deferred income tax
liabilities of $11.7 million, an increase in net regulatory assets of $14.7
million and an increase in net income of $3 million.
 
     Income tax expense (benefit) consists of the following (thousands of
dollars):
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                           --------------------------------
                                                            1993        1992         1991
                                                           -------     -------     --------
    <S>                                                    <C>         <C>         <C>
    Current:
      Federal............................................  $  (402)    $13,879     $ 16,942
      State..............................................      700       1,982        2,108
                                                           -------     -------     --------
                                                               298      15,861       19,050
                                                           -------     -------     --------
    Deferred:
      Federal............................................   10,128      (1,350)     (17,573)
      State..............................................      833         (38)        (836)
                                                           -------     -------     --------
                                                            10,961      (1,388)     (18,409)
                                                           -------     -------     --------
              Total income tax expense...................  $11,259     $14,473     $    641
                                                           -------     -------     --------
                                                           -------     -------     --------
</TABLE>
 
                                       89
<PAGE>   94
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 14 -- INCOME TAXES -- (CONTINUED)
     Deferred income tax expense (benefit) consists of the following significant
components (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                           --------------------------------
                                                            1993        1992         1991
                                                           -------     -------     --------
    <S>                                                    <C>         <C>         <C>
    Deferred federal and state:
      Real estate/loan loss provisions...................  $11,912     $(5,667)    $(12,221)
      Property-related items.............................      552         393        5,317
      Energy cost adjustments............................    3,804        (132)      (6,970)
      Loan fees and discounted interest..................      425      (1,030)      (1,490)
      Unearned revenues..................................     (865)         --           --
      Self insurance.....................................     (691)        444         (401)
      CMO................................................      827        (544)        (218)
      Customer refunds...................................       --       5,275        2,192
      All other deferred.................................   (4,154)        706       (3,641)
                                                           -------     -------     --------
              Total deferred federal and state...........   11,810        (555)     (17,432)
                                                           -------     -------     --------
    Deferred investment tax credit, net..................     (849)       (833)        (977)
                                                           -------     -------     --------
              Total deferred income tax expense
                (benefit)................................  $10,961     $(1,388)    $(18,409)
                                                           -------     -------     --------
                                                           -------     -------     --------
</TABLE>
 
     The consolidated effective income tax rate for each of the three years in
the period ended December 31, 1993 varies from the federal statutory income tax
rate. The sources of these differences and the effect of each are summarized as
follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                                ---------------------------
                                                                1993       1992       1991
                                                                ----       ----       -----
    <S>                                                         <C>        <C>        <C>
    Federal statutory income tax (benefit) rate...............  35.0%      34.0%      (34.0)%
      Net state tax liability.................................   3.9        5.8         4.1
      Property-related items..................................   4.8        4.0        12.5
      Bad debt deduction......................................    --       (7.7)      (49.6)
      Purchase accounting adjustments.........................    --       (0.3)       (0.5)
      Goodwill amortization...................................  14.6        4.4        10.4
      Provision for estimated loan loss.......................    --       14.9        66.6
      Tax credits.............................................  (3.6)      (2.7)       (7.0)
      Tax exempt interest.....................................  (0.7)      (0.3)       (0.2)
      Effect of Internal Revenue Service examination..........  (4.8)        --          --
      All other differences...................................  (1.5)      (7.1)        2.4
                                                                ----       ----       -----
    Consolidated effective income tax rate....................  47.7%      45.0%        4.7%
                                                                ----       ----       -----
                                                                ----       ----       -----
</TABLE>
 
                                       90
<PAGE>   95
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 14 -- INCOME TAXES -- (CONTINUED)
     Deferred tax assets and liabilities consisted of the following (thousands
of dollars):
 
<TABLE>
<CAPTION>
                                                                      YEAR ENDED DECEMBER
                                                                              31,
                                                                     ---------------------
                                                                       1993         1992
                                                                     --------     --------
    <S>                                                              <C>          <C>
    Deferred tax assets:
      Deferred income taxes for future amortization of ITC.........  $ 14,312     $     --
      Allowance for estimated loan losses..........................     5,785           --
      Real estate held for sale....................................     4,865       17,213
      Employee benefits............................................     3,699        1,955
      Other........................................................     5,974        7,524
      Valuation allowance..........................................        --           --
                                                                     --------     --------
                                                                       34,635       26,692
                                                                     --------     --------
    Deferred tax liabilities:
      Property-related items, including accelerated depreciation...    90,652       89,469
      Property-related items previously flowed-through.............    31,083           --
      Unamortized ITC..............................................    22,992       23,854
      Regulatory balancing accounts................................    20,218       17,594
      Securities available for sale................................     4,717           --
      Debt-related costs...........................................     4,396        4,577
      Other........................................................    12,135       11,871
                                                                     --------     --------
                                                                      186,193      147,365
                                                                     --------     --------
    Net deferred tax liabilities...................................  $151,558     $120,673
                                                                     --------     --------
                                                                     --------     --------
</TABLE>
 
     Prior to 1981, federal income tax expense for the gas segment was reduced
to reflect additional depreciation and other deductions claimed for income tax
purposes (flow-through method). Subsequently, deferred taxes have been provided
for all differences between book and taxable income (normalization method) in
all jurisdictions. The various utility regulatory authorities have consistently
allowed the recovery of previously flowed-through income tax benefits on
property related items by means of increased federal income tax expense in
determining cost of service for ratemaking purposes. Pursuant to SFAS No. 109, a
deferred tax liability and corresponding regulatory asset of approximately $31
million are included in the financial statements to reflect the expected
recovery of income tax benefits previously flowed-through.
 
     In August 1993, President Clinton signed into law the Omnibus Budget
Reconciliation Act of 1993 (the Act). The Act increased the federal income tax
rate for corporations from 34 percent to 35 percent, retroactive to January 1,
1993. As a result of the increase, the Company recognized additional net
deferred income tax liabilities and associated net regulatory assets at December
31, 1993, of approximately $4.5 million. The Company anticipates full recovery
of the additional regulatory assets. The increase in net deferred income tax
liabilities related to the Company's nonregulated operations was not
significant.
 
     For financial reporting purposes, the Company has deferred recognition of
investment tax credits (ITC) by amortizing the benefit over the depreciable
lives of the related properties. Pursuant to SFAS No. 109, a deferred tax asset
and corresponding regulatory liability of approximately $14.3 million are
included in the financial statements to reflect the Company's expected reduction
to future income tax expense that will result from the amortization of ITC
through utility rates.
 
     Under the Internal Revenue Code, the Bank is allowed a special bad debt
deduction (unrelated to the amount of losses charged to earnings) based on a
percentage of taxable income (currently eight percent).
 
                                       91
<PAGE>   96
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 14 -- INCOME TAXES -- (CONTINUED)
Under SFAS No. 109, no deferred taxes are provided on bad debt reserves arising
prior to December 31, 1987, unless it becomes apparent that these differences
will reverse in the foreseeable future. At December 31, 1993, the portion of tax
bad debt reserves not expected to reverse was $13.4 million, which resulted in a
retained earnings benefit of $4.5 million, recognized in years prior to 1988.
 
NOTE 15 -- SEGMENT INFORMATION
 
     The financial information pertaining to the Company's gas and financial
services segments for each of the three years in the period ended December 31,
1993, is as follows (thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                          1993
                                                   --------------------------------------------------
                                                                   FINANCIAL SERVICES
                                                      GAS       ------------------------
                                                   OPERATIONS    BANKING     REAL ESTATE     TOTAL
                                                   ----------   ----------   -----------   ----------
<S>                                                <C>          <C>          <C>           <C>
Revenues.........................................  $  539,105   $  150,636    $     100    $  689,841
Operating expenses excluding income taxes........     461,423      139,830        1,010       602,263
                                                   ----------   ----------   -----------   ----------
Operating income (loss)..........................  $   77,682   $   10,806    $    (910)   $   87,578
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Depreciation, depletion and amortization.........  $   55,088   $    8,495    $      --    $   63,583
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Construction expenditures........................  $  113,903   $    1,521    $      --    $  115,424
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Identifiable assets..............................  $1,194,679   $1,737,624    $  13,795    $2,946,098
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                          1992
                                                   --------------------------------------------------
                                                                   FINANCIAL SERVICES
                                                      GAS       ------------------------
                                                   OPERATIONS    BANKING     REAL ESTATE     TOTAL
                                                   ----------   ----------   -----------   ----------
<S>                                                <C>          <C>          <C>           <C>
Revenues.........................................  $  534,390   $  181,070    $   3,023    $  718,483
Operating expenses excluding income taxes........     448,815      175,511       18,309       642,635
                                                   ----------   ----------   -----------   ----------
Operating income (loss)..........................  $   85,575   $    5,559    $ (15,286)   $   75,848
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Depreciation, depletion and amortization.........  $   52,277   $    8,391    $      --    $   60,668
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Construction expenditures........................  $  102,517   $    3,078    $      --    $  105,595
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Identifiable assets..............................  $1,103,794   $2,210,232    $  27,502    $3,341,528
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                          1991
                                                   --------------------------------------------------
                                                                   FINANCIAL SERVICES
                                                      GAS       ------------------------
                                                   OPERATIONS    BANKING     REAL ESTATE     TOTAL
                                                   ----------   ----------   -----------   ----------
<S>                                                <C>          <C>          <C>           <C>
Revenues.........................................  $  565,010   $  229,562    $     219    $  794,791
Operating expenses excluding income taxes........     498,753      216,239       50,696       765,688
                                                   ----------   ----------   -----------   ----------
Operating income (loss)..........................  $   66,257   $   13,323    $ (50,477)   $   29,103
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Depreciation, depletion and amortization.........  $   47,140   $    8,209    $      --    $   55,349
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Construction expenditures........................  $   76,871   $    4,192    $      --    $   81,063
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
Identifiable assets..............................  $1,106,917   $2,313,102    $  42,955    $3,462,974
                                                   ----------   ----------   -----------   ----------
                                                   ----------   ----------   -----------   ----------
</TABLE>
 
                                       92
<PAGE>   97
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 16 -- QUARTERLY FINANCIAL DATA (UNAUDITED)
 
                                  CONSOLIDATED
                            QUARTERLY FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                                                      QUARTER ENDED:
                                                    ---------------------------------------------------
                                                    MARCH 31    JUNE 30    SEPTEMBER 30    DECEMBER 31
                                                    ---------   --------   -------------   ------------
                                                     (THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)
<S>                                                 <C>         <C>        <C>             <C>
1993
Operating revenues................................  $ 220,561   $137,971     $ 126,244       $205,065
Operating income (loss)...........................     35,937     (5,401)         (257)        57,299
Net income (loss) before cumulative effect of
  accounting change...............................     14,081    (13,072)       (7,344)        18,696
Net income (loss).................................     17,126    (13,072)       (7,344)        18,696
Net income (loss) applicable to common stock......     16,920    (13,275)       (7,538)        18,558
Earnings (loss) per share before cumulative effect
  of accounting change............................        .67       (.64)         (.37)           .90
Earnings (loss) per common share*.................        .82       (.64)         (.37)           .90
1992
Operating revenues................................  $ 240,646   $144,291     $ 125,229       $208,317
Operating income (loss)...........................     36,868     (5,107)       (5,628)        49,715
Net income (loss).................................     14,808    (10,447)      (11,395)        24,695
Net income (loss) applicable to common stock......     14,535    (10,718)      (11,656)        24,449
Earnings (loss) per common share*.................        .71       (.52)         (.57)          1.19
1991
Operating revenues................................  $ 256,173   $171,756     $ 146,443       $220,419
Operating income (loss)...........................     26,071    (34,448)       (3,425)        40,905
Net income (loss).................................      5,623    (28,296)       (7,639)        16,137
Net income (loss) applicable to common stock......      5,282    (28,637)       (7,973)        15,828
Earnings (loss) per common share*.................        .26      (1.41)         (.39)           .78
</TABLE>
 
- ---------------
 
* The sum of quarterly earnings (loss) per average common share may not equal
  the annual earnings (loss) per share due to the ongoing change in the weighted
  average number of common shares outstanding.
 
     The demand for natural gas is seasonal, and it is management's opinion that
comparisons of earnings for the interim periods do not reliably reflect overall
trends and changes in the Company's operations. Also, the timing of general rate
relief can have a significant impact on earnings for interim periods. See MD&A
for additional discussion of the Company's operating results.
 
                                       93
<PAGE>   98
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 16 -- QUARTERLY FINANCIAL DATA (UNAUDITED) -- (CONTINUED)
                                      BANK
                            QUARTERLY FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                                                      QUARTER ENDED:
                                                    ---------------------------------------------------
                                                    MARCH 31    JUNE 30    SEPTEMBER 30    DECEMBER 31
                                                    ---------   --------   -------------   ------------
                                                                  (THOUSANDS OF DOLLARS)
<S>                                                 <C>         <C>        <C>             <C>
1993
Interest income...................................  $  35,997   $ 34,976      $31,881        $ 29,471
Interest expense..................................     22,240     20,906       17,267          14,663
Provision for estimated losses....................      1,361      1,397        2,782           1,682
Net income (loss) before cumulative effect of
  accounting change...............................        609     (4,717)       5,341           2,318
Net income (loss).................................      3,654     (4,717)       5,341           2,318

1992
Interest income...................................  $  47,552   $ 44,910      $37,818        $ 35,398
Interest expense..................................     33,041     30,933       25,315          22,628
Provision for estimated losses....................     14,277      8,625        5,240           4,296
Net income (loss).................................     (4,897)    (3,890)      (1,557)            526

1991
Interest income...................................  $  59,083   $ 53,899      $50,941        $ 50,068
Interest expense..................................     43,887     39,910       38,713          36,278
Provision for estimated losses....................     18,608     37,824        1,509           4,813
Net income (loss).................................    (10,337)   (20,467)       1,362           1,042
</TABLE>
 
NOTE 17 -- SUBSEQUENT EVENT -- ARIZONA PIPE REPLACEMENT PROGRAM DISALLOWANCES
 
     Arizona Rate Cases.  In August 1990, the ACC issued its opinion and order
(Decision No. 57075) on the Company's 1989 general rate increase requests
applicable to the Company's Central and Southern Arizona Divisions. Among other
things, the order stated that $16.7 million of the total capital expenditures
incurred as part of the Company's Central Arizona Division pipe replacement
program were disallowed for ratemaking purposes and all costs incurred as part
of the Company's Southern Arizona Division pipe replacement program were
excluded from the rate case and rate consideration was deferred to the Company's
next general rate application, which was filed in November 1990.
 
     In October 1990, the Company filed a Complaint in the Superior Court of the
State of Arizona, against the ACC, to seek a judgement modifying or setting
aside this decision. In February 1991, the Company filed a Motion for Summary
Judgement in the Superior Court to seek a judgement summarily determining that
Decision No. 57075 of the ACC is unreasonable and unlawful and, in accordance
with that determination, modifying or setting aside Decision No. 57075 and
allowing the Company to establish and collect reasonable, temporary rates under
bond, pending the establishment of reasonable and lawful rates by the
Commission. In June 1991, the Court affirmed the ACC's rate order without
explanation or opinion. In August 1991, the Company appealed to the Arizona
Court of Appeals from the Superior Court's judgement. In April 1993, Division
Two of the Arizona Court of Appeals issued a Memorandum Decision affirming the
ACC's opinion and order. Based on this decision, the Company filed a Motion for
Reconsideration in the Court of Appeals in May 1993. The Motion for
Reconsideration was denied and the Company, in July 1993, filed a Petition for
Review with the Arizona Supreme Court. On February 25, 1994, immediately
following the denial of the
 
                                       94
<PAGE>   99
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 17 -- SUBSEQUENT EVENT -- ARIZONA PIPE REPLACEMENT PROGRAM
DISALLOWANCES -- (CONTINUED)
Petition for Review by the Arizona Supreme Court, the Court of Appeals issued
its Mandate ordering the Company to comply with its April 1993 Memorandum
Decision.
 
     As a result of the Arizona Court of Appeals Division Two Mandate, the
Company has written off $15.9 million in gross plant related to the central and
southern Arizona pipe replacement program disallowances. The impact of these
disallowances, net of accumulated depreciation, tax benefits and other related
items, was a non-cash reduction to 1993 net income of $9.3 million, or $0.44 per
share. Discussions relative to each replacement program follows.
 
  Central Arizona Division
 
     In November 1984, the Company acquired all of the gas utility assets of
Arizona Public Service Company (APS) for $111 million, which was $31 million
less than net book value. By Order dated May 30, 1984, the ACC authorized the
Company to include the acquired gas assets in the Company's rate base at the
same original cost (irrespective of the Company's purchase price) assigned to
such assets for ratemaking purposes in the last APS gas general rate case prior
to the November closing. At the same time, the Company committed to replace
certain distribution pipe purchased from APS because the pipe was aging
prematurely, and thus was not adequate to meet long-term safety requirements.
The Company invested $123 million in the central Arizona pipe replacement
program. The project was completed, under budget, in 1991.
 
     In Decision No. 57075, the ACC found that at the time it authorized the
Company to acquire the APS assets, it was aware of the cost estimates of the
Company's pipe replacement program; the Company's management and implementation
of the replacement program had been sound; and there were no allegations of
imprudence in connection with the replacement program. Despite these findings,
the ACC disallowed a total of $16.7 million of the Company's capital
expenditures pertaining to the pipe replacement program. This disallowance was
reduced to $14.6 million in August 1993.
 
     The Company maintained that the reasons implicit in the ACC's decision to
cause the disallowance of a portion of the costs of the pipe replacement program
were erroneous and led to the denial of rate base treatment -- a result which is
contrary to the Arizona Constitution, statutes and existing case law. Prior
Commissions approved the terms and conditions, including the purchase price, for
the acquisition of the APS system. The Company had continuously kept the ACC
informed of the progress, including the costs, of the replacement program. In
addition, existing case law in Arizona makes the purchase price immaterial for
ratemaking purposes. The Arizona Constitution requires the ACC to first
establish a rate base by finding the fair value of a utility company's property,
and existing case law provides that a utility is entitled to earn a fair and
reasonable rate of return on its system that is used and useful in the service
of the public. The Company believed that the disallowance was illegal and,
therefore, had not previously written off any plant assets.
 
  Southern Arizona Division
 
     In April 1979, the Company acquired all of the gas utility assets of TEP.
As part of the purchase agreement, TEP warranted that the gas facilities had
been properly installed according to applicable codes. The Company replaced
certain distribution pipe purchased from TEP and it was the Company's contention
that, unbeknown to the Company at the time of acquisition, TEP used questionable
pipe installation practices which resulted in the need for this replacement
program. Citing the warranty provided at the time of purchase, the Company filed
suit against TEP seeking damages as compensation for its pipe replacement costs.
In April 1990, the Company and TEP reached an out-of-court settlement in which
the Company agreed to dismiss its lawsuit in exchange for payment from TEP of
$25 million, plus $3 million in interest, over a three year period. To reflect
the settlement, a $25 million receivable was recorded and gas utility property
reduced by
 
                                       95
<PAGE>   100
 
                   SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 17 -- SUBSEQUENT EVENT -- ARIZONA PIPE REPLACEMENT PROGRAM
DISALLOWANCES -- (CONTINUED)
$22.6 million. The remaining $2.4 million was used as a recovery of litigation
expenses. As of December 31, 1993, all amounts due from TEP were fully
collected.
 
     The August 1990 opinion and order stated that all southern Arizona pipe
replacement costs, including all related interest costs, property taxes and
depreciation expenses, were eliminated from the rate case revenue requirement
and deferred for rate consideration to the next general rate application of the
Company. In addition, the ACC ordered that all related interest costs, property
taxes and depreciation expenses were to be deferred until the allowable portion
of the pipe replacement costs was ultimately determined by the ACC and reflected
in rates.
 
     In November 1990, the Company filed a new general rate case with the ACC
applicable to its southern Arizona rate jurisdiction. The application included a
request for full recovery of all capitalized and deferred costs related to the
pipe replacement program as ordered by the ACC in the prior general rate case.
 
     In February 1992, the ACC issued its opinion and order on the Company's
rate request. Among other things, the opinion and order stated that $1.3 million
of the $35 million in capital expenditures incurred as part of the Company's
southern Arizona pipe replacement program were disallowed for ratemaking
purposes. The Company believes that future disallowances of pipe replacement
costs, if any, associated with the southern Arizona pipe replacement program
will not materially impact the results of operations.
 
     In April 1992, the Company filed a Notice of Appeal with the Arizona Court
of Appeals Division One challenging the lawfulness of the February 1992 decision
issued by the ACC. The Company maintains that the Arizona constitution requires
the ACC to first establish a rate base by finding the fair value of a utility
company's property, and existing case law provides that a utility is entitled to
earn a fair and reasonable rate of return on its system that is used and useful
in the service of the public. Although this case has not yet been considered by
Division One of the Arizona Court of Appeals, the Company considers the issues
involved to be controlled by the February 1994 denial of the Petition for Review
by the Arizona Supreme Court and the Mandate of Division Two of the Arizona
Court of Appeals and, therefore, has written off the applicable pipe replacement
costs.
 
                                       96
<PAGE>   101
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Shareholders,
Southwest Gas Corporation:
 
     We have audited the accompanying consolidated statements of financial
position of Southwest Gas Corporation (a California corporation, hereinafter
referred to as the Company) and subsidiaries as of December 31, 1993 and 1992,
and the related consolidated statements of income, stockholders' equity and cash
flows for each of the three years in the period ended December 31, 1993. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of the Company and its
subsidiaries as of December 31, 1993 and 1992, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1993 in conformity with generally accepted accounting principles.
 
     As discussed in notes 1, 13 and 14 of the notes to consolidated financial
statements, and as required by generally accepted accounting principles, the
Company changed its methods of accounting for investments in certain debt and
equity securities, postretirement benefits other than pensions and income taxes
in 1993.
 
                                          ARTHUR ANDERSEN & CO.
 
Las Vegas, Nevada
February 25, 1994
 
                                       97
<PAGE>   102
 
ITEM 9.  DISAGREEMENTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
 
     None.
 
                                    PART III
 
ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
     (a) Identification of Directors.  Information with respect to Directors is
         set forth under the heading "Election of Directors" in the Company's
         definitive Proxy Statement dated March 31, 1994, which by this
         reference is incorporated herein.
 
     (b) Identification of Executive Officers.  The name, age, position and
         period during which held for each of the Executive Officers of the
         Company are as follows:
 
<TABLE>
<CAPTION>
                                                                                   PERIOD POSITION
          NAME               AGE                       POSITION                         HELD
- -------------------------    ---     --------------------------------------------  ---------------
<S>                          <C>     <C>                                           <C>
Michael O. Maffie            46      President and Chief Executive Officer         1993-Present
                                     President and Chief Operating Officer         1989-1993
Dan J. Cheever               38      President and Chief Executive
                                       Officer/PriMerit Bank                       1992-Present
                                     President and Chief Operating
                                       Officer/PriMerit Bank                       1991-1992
George C. Biehl              46      Senior Vice President and Chief Financial
                                       Officer                                     1990-Present
James F. Lowman              47      Senior Vice President/Central Arizona
                                       Division                                    1989-Present
Dudley J. Sondeno            41      Senior Vice President/Staff Operations        1993-Present
                                     Vice President/Engineering and Operations
                                       Support                                     1989-1993
L. Keith Stewart             53      Senior Vice President/Operations              1993-Present
                                     Senior Vice President/Southern Arizona
                                       Division                                    1992-1993
                                     Senior Vice President/Nevada-California
                                       Region                                      1989-1992
Thomas J. Trimble            62      Senior Vice President, General Counsel and
                                       Corporate Secretary                         1990-Present
                                     Senior Vice President and General Counsel     1989-1990
</TABLE>
 
     (c) Identification of Certain Significant Employees.
 
         None.
 
     (d) Family Relationships.  None of the Company's Directors or Executive
         Officers are related to any other either by blood, marriage or
         adoption.
 
     (e) Business Experience.  Information with respect to Directors is set
         forth under the heading "Election of Directors" in the Company's
         definitive Proxy Statement dated March 31, 1994, which by this
         reference is incorporated herein. All Executive Officers, except George
         C. Biehl and Dan J. Cheever, have held responsible positions with the
         Company for at least five years as described in (b) above.
 
              Dan J. Cheever began his employment with the Bank in January 1989.
         Positions held at the Bank by Cheever from 1989 through 1991 include
         Senior Vice President and Treasurer, and Executive Vice President and
         Chief Financial Officer.
 
              George C. Biehl began his employment with the Company in January
         1990. Biehl was the Chief Financial Officer of the Bank in 1989.
 
     (f) Involvement in Certain Legal Proceedings.
 
         None.
 
     (g) Item 405 Review.  Section 16(a) of the Securities Exchange Act of 1934
         requires the Company's officers and directors, and persons who own more
         than ten percent of a registered class of the
 
                                       98
<PAGE>   103
 
         Company's equity securities, to file reports of ownership and changes
         in ownership with the Securities and Exchange Commission (SEC) and the
         New York Stock Exchange. Officers, directors and greater than
         ten-percent shareholders are required by SEC regulation to furnish the
         Company with copies of all Section 16(a) forms they file.
 
              Based solely on review of the copies of such forms furnished to
         the Company, or written representations that no Form No. 5's were
         required, the Company believes that during 1993, all Section 16(a)
         filing requirements applicable to its officers, directors and greater
         than ten-percent beneficial owners were complied with.
 
ITEM 11.  EXECUTIVE COMPENSATION
 
     Information with respect to executive compensation is set forth under the
heading "Executive Compensation and Benefits" in the Company's definitive Proxy
Statement dated March 31, 1994, which by this reference is incorporated herein.
 
ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     (a) Not applicable.
 
     (b) Information with respect to security ownership of management is set
         forth under the heading "Securities Ownership by Nominees and Executive
         Officers" in the Company's definitive Proxy Statement dated March 31,
         1994, which by this reference is incorporated herein.
 
     (c) Not applicable.
 
ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
     Information with respect to certain relationships and related transactions
is set forth under the heading "Certain Relationships and Related Transactions"
in the Company's definitive Proxy Statement dated March 31, 1994, which by this
reference is incorporated herein.
 
                                       99
<PAGE>   104
 
                                    PART IV
 
ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 10-K
 
     (a) The following documents are filed as part of this report on Form 10-K:
 
          (1) The following are included in Part II, Item 8 of this form:
 
<TABLE>
<CAPTION>
                                                                                          PAGES
                                                                                          -----
<S>                                                                                       <C>
              Consolidated statements of financial position.............................    58
              Consolidated statements of income.........................................    59
              Consolidated statements of cash flows.....................................    60
              Consolidated statements of stockholders' equity...........................    61
              Notes to consolidated financial statements................................    62
              Report of independent public accountants..................................    97

          (2) Report of independent public accountants on schedules.....................   104
              Schedule V   --   Property, plant and equipment...........................   105
              Schedule VI  --   Accumulated depreciation and amortization of property,
                                plant and equipment.....................................   106
              Schedule VIII --  Valuation and qualifying accounts.......................   107
              Schedule IX  --   Short-term borrowings...................................   108
              Schedule X   --   Supplementary income statement information..............   109
</TABLE>
 
          (3) See list of exhibits.
 
     (b) Reports on Form 8-K
 
        The Company filed a Form 8-K, dated February 25, 1994, reporting on the
        Arizona Court of Appeals Division Two Mandate ordering the write-off of
        Arizona pipe replacement program costs.
 
     (c) See Exhibits.
 
     (d) See Schedules.
 
                                       100
<PAGE>   105
 
                                LIST OF EXHIBITS
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                   DESCRIPTION OF DOCUMENT
- ------       ----------------------------------------------------------------------------
<S>          <C>
 2.01        Not applicable.
 3.01 (3)    Restated Articles of Incorporation and Bylaws, as amended.
 4.01 (1)    Certificate of Determination establishing Cumulative Preferred Stock, 9.5%
             Dividend Series, effective December 11, 1979.
 4.02 (4)    Indenture between the Company and Bank of America National Trust and Savings
             Association, as successor by merger to Security Pacific National Bank as
             Trustee, dated August 1, 1986, with respect to the Company's 9% Series A and
             Series B and 8 3/4% Series C Debentures.
 4.03 (5)    First Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of October 1, 1986, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 9%
             Debentures, Series A, due 2011.
 4.04 (5)    Second Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of November 1, 1986, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 9%
             Debentures, Series B, due 2011.
 4.05 (6)    Third Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of December 1, 1986, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 8 3/4%
             Debentures, Series C, due 2011.
 4.06 (6)    Fourth Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of February 1, 1987, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 10%
             Debentures, Series D, due 2017.
 4.07 (7)    Fifth Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of August 1, 1988, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 9 3/8%
             Debentures, Series E, due 2013.
 4.08 (9)    Sixth Supplemental Indenture of the Company to Bank of America National Trust
             and Savings Association, as successor by merger to Security Pacific National
             Bank as Trustee, dated as of June 16, 1992, supplementing and amending the
             Indenture dated as of August 1, 1986, with respect to the Company's 9 3/4%
             Debentures, Series F, due 2002.
 4.09 (10)   Indenture between Clark County, Nevada, and Bank of America Nevada as Trustee,
             dated September 1, 1992, with respect to the issuance of $130,000,000 Industrial
             Development Revenue Bonds (Southwest Gas Corporation), $30,000,000 1992 Series A
             and $100,000,000 1992 Series B.
 4.10        Indenture between Clark County, Nevada, and Harris Trust and Savings Bank as
             Trustee, dated December 1, 1993, with respect to the issuance of $75,000,000
             Industrial Development Revenue Bonds (Southwest Gas Corporation), 1993 Series A,
             due 2033.
 4.11        Indenture between City of Big Bear Lake, California, and Harris Trust and
             Savings Bank as Trustee, dated December 1, 1993, with respect to the issuance of
             $50,000,000 Industrial Development Revenue Bonds (Southwest Gas Corporation
             Project), 1993 Series A, due 2028.
 9.01        Not applicable.
</TABLE>
 
                                       101
<PAGE>   106
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                   DESCRIPTION OF DOCUMENT
- ------       --------------------------------------------------------------------------------
<S>          <C>
10.01 (2)    Participation Agreement among the Company and General Electric Credit
             Corporation, Prudential Insurance Company of America, Aetna Life Insurance
             Company, Merrill Lynch Interfunding, Bank of America through purchase of Valley
             Bank of Nevada, Bankers Trust Company and First Interstate Bank of Nevada, dated
             as of July 1, 1982.
10.02 (2)    Lease and Agreement between the Company and Spring Mountain Road Associates,
             dated as of June 15, 1982 and amended as of July 1, 1982.
10.03        Financing Agreement between the Company and Clark County, Nevada, dated
             September 1, 1992.
10.04        Financing Agreement between the Company and Clark County, Nevada, dated as of
             December 1, 1993.
10.05        Project Agreement between the Company and City of Big Bear Lake, California,
             dated as of December 1, 1993.
10.06 (11)   Southwest Gas Corporation Executive Deferral Plan as amended October 29, 1992.
10.07 (11)   Southwest Gas Corporation Directors Deferral Plan as amended October 29, 1992.
10.08        Directors Retirement Plan amended and restated effective October 1, 1993.
10.09 (12)   Management Incentive Plan adopted as of May 12, 1993, replacing Management
             Incentive Plan adopted as of December 1, 1986, as amended May 12, 1988.
10.10 (13)   Supplemental Retirement Plan, amended and restated as of March 2, 1993.
10.11 (8)    $80 million Credit Agreement between the Company, Bankers Trust Company, et al.,
             dated as of July 23, 1984, and amended as of December 1, 1989.
10.12 (8)    $125 million Commercial Paper Restated and Amended Credit Agreement between the
             Company, Union Bank of Switzerland, et al., dated as of April 11, 1990.
10.13        Agreements between PriMerit Bank and World Savings and Loan Association
             regarding sale of Arizona assets and assumption of related liabilities.
11.01        Not applicable.
12.01        Not applicable.
13.01        Not applicable.
16.01        Not applicable.
18.01        Not applicable.
21.01        List of subsidiaries of Southwest Gas Corporation.
22.01        Not applicable.
23.01        Consent of Arthur Andersen & Co., Independent Public Accountants.
24.01        Not applicable.
27.01        Not applicable.
28.01        Not applicable.
</TABLE>
 
- ---------------
 
 (1) Incorporated herein by reference to the Company's Registration Statement on
     Form S-16, No. 2-68833.
 
 (2) Incorporated herein by reference to the Company's report on Form 10-K for
     the year ended December 31, 1982.
 
 (3) Incorporated herein by reference to Exhibit 4.01 to the Company's
     Registration Statement on Form S-2, No. 2-92938.
 
 (4) Incorporated herein by reference to Exhibit 4.02 to the Company's
     Registration Statement on Form S-3, No. 33-7931.
 
                                       102
<PAGE>   107
 
 (5) Incorporated herein by reference to the Company's report on Form 10-K for
     the year ended December 31, 1986.
 
 (6) Incorporated herein by reference to the Company's report on Form 10-Q for
     the quarter ended March 31, 1987.
 
 (7) Incorporated herein by reference to the Company's report on Form 8-K dated
     August 23, 1988.
 
 (8) Incorporated herein by reference to the Company's report on Form 10-K for
     the year ended December 31, 1991.
 
 (9) Incorporated herein by reference to the Company's report on Form 10-Q for
     the quarter ended June 30, 1992.
 
(10) Incorporated herein by reference to the Company's report on Form 10-Q for
     the quarter ended September 30, 1992.
 
(11) Incorporated herein by reference to the Company's report on Form 10-K for
     the year ended December 31, 1992.
 
(12) Incorporated herein by reference to the Company's report on Form 10-Q for
     the quarter ended June 30, 1993.
 
                                       103
<PAGE>   108
 
             REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS ON SCHEDULES
 
To the Shareholders,
  Southwest Gas Corporation:
 
     We have audited, in accordance with generally accepted auditing standards,
the consolidated financial statements of Southwest Gas Corporation and
subsidiaries included elsewhere in this annual report and have issued our report
thereon dated February 25, 1994. Our audit was made for the purpose of forming
an opinion on the basic financial statements taken as a whole. The schedules
listed in Item 14 are the responsibility of the Company's management and are
presented for purposes of complying with the Securities and Exchange
Commission's rules and are not part of the basic financial statements. These
schedules have been subjected to the auditing procedures applied in the audit of
the basic financial statements and, in our opinion, fairly state in all material
respects the financial data required to be set forth therein in relation to the
basic financial statements taken as a whole.
 
                                          ARTHUR ANDERSEN & CO.
 
Las Vegas, Nevada
February 25, 1994
 
                                       104
<PAGE>   109
 
                                                                      SCHEDULE V
 
                           SOUTHWEST GAS CORPORATION
 
                  SCHEDULE V -- PROPERTY, PLANT AND EQUIPMENT
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1993
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                              BALANCE AT                              TRANSFERS    CONTRIBUTIONS    BALANCE
                              BEGINNING    ADDITIONS   RETIREMENTS       AND         IN AID OF       AT END
                               OF YEAR      AT COST     OR SALES     ADJUSTMENTS   CONSTRUCTION     OF YEAR
                              ----------   ---------   -----------   -----------   -------------   ----------
<S>                           <C>          <C>         <C>           <C>           <C>             <C>
Year ended December 31,
  1991:
  Plant in service:
     Production, gathering
       and storage..........  $   13,570   $     398     $    19      $      24       $    --      $   13,973
     Transmission...........      81,496      12,460         184            (67)           17          93,688
     Distribution...........     807,713      62,437       4,682         13,261         5,683         873,046
     General................     137,547      12,000       4,713            922            (3)        145,759
     Other..................      28,339       4,108         284             --            --          32,163
                              ----------   ---------   -----------   -----------   -------------   ----------
                              1,068,665..     91,403       9,882         14,140         5,697       1,158,629
Construction work in
  progress..................      26,507      (9,982)         --             --            --          16,525
Acquisition adjustment,
  net.......................       2,031       6,251          --           (256)           --           8,026
Other property..............  82,544....       4,247       8,072            781            --          79,500
                              ----------   ---------   -----------   -----------   -------------   ----------
                              $1,179,747   $  91,919     $17,954      $  14,665       $ 5,697      $1,262,680
                              ----------   ---------   -----------   -----------   -------------   ----------
                              ----------   ---------   -----------   -----------   -------------   ----------
Year ended December 31,
  1992:
  Plant in service:
     Production, gathering
       and storage..........  $   13,973   $     174     $     1      $      --       $   318      $   13,828
     Transmission...........      93,688      16,531         356             --             6         109,857
     Distribution...........     873,046      69,027       4,926             --         4,608         932,539
     General................     145,759       5,256       2,370              5            --         148,650
     Other..................      32,163         357          --            (52)           --          32,468
                              ----------   ---------   -----------   -----------   -------------   ----------
                              1,158,629..     91,345       7,653            (47)        4,932       1,237,342
Construction work in
  progress..................      16,525      14,796          --             --            --          31,321
Acquisition adjustment,
  net.......................       8,026          --          --           (462)           --           7,564
Other property..............      79,500       3,651         781        (13,008)           --          69,362
                              ----------   ---------   -----------   -----------   -------------   ----------
                              $1,262,680   $ 109,792     $ 8,434      $ (13,517)      $ 4,932      $1,345,589
                              ----------   ---------   -----------   -----------   -------------   ----------
                              ----------   ---------   -----------   -----------   -------------   ----------
Year ended December 31,
  1993:
  Plant in service:
     Production, gathering
       and storage..........  $   13,828   $     143     $    11      $      --       $    --      $   13,960
     Transmission...........     109,857      29,778         428             56             1         139,262
     Distribution...........     932,539      85,376       8,578        (15,886)        4,430         989,021
     General................     148,650      11,717       9,980             95            --         150,482
     Other..................      32,468         698         166             --            --          33,000
                              ----------   ---------   -----------   -----------   -------------   ----------
                               1,237,342     127,712      19,163        (15,735)        4,431       1,325,725
Construction work in
  progress..................      31,321     (10,563)         --             --            --          20,758
Acquisition adjustment,
  net.......................       7,564          --          --           (404)           --           7,160
Other property..............      69,362       2,606       7,442         (2,802)           --          61,724
                              ----------   ---------   -----------   -----------   -------------   ----------
                              $1,345,589   $ 119,755     $26,605      $ (18,941)      $ 4,431      $1,415,367
                              ----------   ---------   -----------   -----------   -------------   ----------
                              ----------   ---------   -----------   -----------   -------------   ----------
</TABLE>
 
                                       105
<PAGE>   110
 
                                                                     SCHEDULE VI
 
                           SOUTHWEST GAS CORPORATION
 
             SCHEDULE VI--ACCUMULATED DEPRECIATION AND AMORTIZATION
                        OF PROPERTY, PLANT AND EQUIPMENT
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1993
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                               ADDITIONS
                                                CHARGED                                                  BALANCE
                               BALANCE AT         TO                 DEDUCTIONS            TRANSFERS        AT
                                BEGINNING    DEPRECIATION    --------------------------       AND         END OF
                                 OF YEAR        EXPENSE      RETIREMENTS   NET SALVAGE    ADJUSTMENTS      YEAR
                               -----------   -------------   -----------   ------------   ------------   --------
<S>                            <C>           <C>             <C>           <C>            <C>            <C>
Year ended December 31, 1991:
  Production, gathering and
     storage.................   $   4,434       $   968        $    19        $   --        $     27     $  5,410
  Transmission...............      33,195         1,583            184           115             (52)      34,427
  Distribution...............     211,973        33,598          4,681         2,294           3,237      241,833
  General....................      31,215         7,164          4,591          (278)            206       34,272
  Other......................       9,649         3,691            122            --            (237)      12,981
  Retirement work in
     progress................        (223)           --             --          (226)             --            3
                               -----------   -------------   -----------   ------------   ------------   --------
                                  290,243        47,004          9,597         1,905           3,181      328,926
  Other property.............      25,244         4,164          2,100            --              85       27,393
                               -----------   -------------   -----------   ------------   ------------   --------
                                $ 315,487       $51,168        $11,697        $1,905        $  3,266     $356,319
                               -----------   -------------   -----------   ------------   ------------   --------
                               -----------   -------------   -----------   ------------   ------------   --------
Year ended December 31, 1992:
  Production, gathering and
     storage.................   $   5,410       $ 1,377        $     1        $   --        $     --     $  6,786
  Transmission...............      34,427         2,241            357            19              --       36,292
  Distribution...............     241,833        36,500          4,925         2,557             (23)     270,828
  General....................      34,272         7,551          2,363          (348)             10       39,818
  Other......................      12,981         3,625              8            --            (406)      16,192
  Retirement work in
     progress................           3            --             --           113              --         (110)
                               -----------   -------------   -----------   ------------   ------------   --------
                                  328,926        51,294          7,654         2,341            (419)     369,806
  Other property.............      27,393         4,380            154             0          (9,056)      22,563
                               -----------   -------------   -----------   ------------   ------------   --------
                                $ 356,319       $55,674        $ 7,808        $2,341        $ (9,475)    $392,369
                               -----------   -------------   -----------   ------------   ------------   --------
                               -----------   -------------   -----------   ------------   ------------   --------
Year ended December 31, 1993:
  Production, gathering and
     storage.................   $   6,786       $ 1,390        $    11        $   --        $     --     $  8,165
  Transmission...............      36,292         3,090            428            13              55       38,996
  Distribution...............     270,828        38,474          8,577         2,662          (3,868)     294,195
  General....................      39,818         7,687          9,978        (1,588)           (149)      38,966
  Other......................      16,192         3,362            168            --            (252)      19,134
  Retirement work in
     progress................        (110)           --             --           191              --         (301)
                               -----------   -------------   -----------   ------------   ------------   --------
                                  369,806        54,003         19,162         1,278          (4,214)     399,155
  Other property.............      22,563         4,506          1,226            --            (614)      25,229
                               -----------   -------------   -----------   ------------   ------------   --------
                                $ 392,369       $58,509        $20,388        $1,278        $ (4,828)    $424,384
                               -----------   -------------   -----------   ------------   ------------   --------
                               -----------   -------------   -----------   ------------   ------------   --------
</TABLE>
 
                                       106
<PAGE>   111
 
                                                                   SCHEDULE VIII
 
                           SOUTHWEST GAS CORPORATION
 
               SCHEDULE VIII -- VALUATION AND QUALIFYING ACCOUNTS
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1993
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                                                   RESERVE FOR
                                                                                  UNCOLLECTIBLES
                                                                                  --------------
<S>                                                                               <C>
Balance, December 31, 1990......................................................     $  1,612
  Additions charged to income...................................................        1,536
  Accounts written off, less recoveries.........................................       (1,775)
                                                                                  --------------
Balance, December 31, 1991......................................................        1,373
  Additions charged to income...................................................        1,667
  Accounts written off, less recoveries.........................................       (1,533)
                                                                                  --------------
Balance, December 31, 1992......................................................        1,507
  Additions charged to income...................................................        1,460
  Accounts written off, less recoveries.........................................       (1,284)
                                                                                  --------------
Balance, December 31, 1993......................................................     $  1,683
                                                                                  --------------
                                                                                  --------------
</TABLE>
 
                                       107
<PAGE>   112
 
                                                                     SCHEDULE IX
 
                           SOUTHWEST GAS CORPORATION
 
                      SCHEDULE IX -- SHORT-TERM BORROWINGS
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1993
                             (THOUSANDS OF DOLLARS)
 
<TABLE>
<CAPTION>
                                                     WEIGHTED                                      WEIGHTED
                                                     AVERAGE        MAXIMUM         AVERAGE        AVERAGE
                                                     INTEREST       AMOUNT          AMOUNT         INTEREST
                                                     RATE AT      OUTSTANDING     OUTSTANDING        RATE
                                      BALANCE AT       YEAR         DURING        DURING THE      DURING THE
                                       YEAR END        END         THE YEAR         YEAR(A)        YEAR(B)
                                      ----------     --------     -----------     -----------     ----------
<S>                                   <C>            <C>          <C>             <C>             <C>
Year ended December 31, 1991 --
  Notes payable to banks............   $ 80,000         6.0%        $80,000         $25,012           6.2%
                                      ----------        ---       -----------     -----------         ---
                                      ----------        ---       -----------     -----------         ---
Year ended December 31, 1992 --
  Notes payable to banks............   $ 20,000         4.6%        $80,000         $32,289           5.3%
                                      ----------        ---       -----------     -----------         ---
                                      ----------        ---       -----------     -----------         ---
Year ended December 31, 1993 --
  Notes payable to banks............   $ 86,000         3.8%        $86,000         $28,904           3.9%
                                      ----------        ---       -----------     -----------         ---
                                      ----------        ---       -----------     -----------         ---
</TABLE>
 
- ---------------
 
(a) Computed by totaling daily outstanding borrowings during each year and
    dividing the resultant total by 365 days.
 
(b) Computed by dividing total interest expense related to short-term borrowings
    during each year by the average amount of such borrowings outstanding.
 
                                       108
<PAGE>   113
 
                                                                      SCHEDULE X
 
                           SOUTHWEST GAS CORPORATION
 
            SCHEDULE X -- SUPPLEMENTARY INCOME STATEMENT INFORMATION
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1993
                             (THOUSANDS OF DOLLARS)
 
     During the years presented, no royalties were paid and advertising costs
incurred were not significant. Amounts charged to income with respect to
amortization of intangible assets, and taxes, other than payroll and income
taxes, during the three years ended December 31, 1993, are as follows:
 
<TABLE>
<CAPTION>
                                                                 1993        1992        1991
                                                                -------     -------     -------
<S>                                                             <C>         <C>         <C>
Maintenance expense...........................................     *           *           *
                                                                -------     -------     -------
                                                                -------     -------     -------
Amortization of intangible assets.............................  $ 5,074     $ 4,994     $ 4,181
                                                                -------     -------     -------
                                                                -------     -------     -------
Real estate and personal property taxes.......................  $23,311     $21,365     $19,936
Taxes, other than payroll and income taxes....................    1,449       1,575       1,098
                                                                -------     -------     -------
                                                                $24,760     $22,940     $21,034
                                                                -------     -------     -------
                                                                -------     -------     -------
Advertising costs.............................................    **          **          **
                                                                -------     -------     -------
                                                                -------     -------     -------
</TABLE>
 
- ---------------
 
 * Separately disclosed on the Consolidated Statements of Income.
 
** Less than one percent of operating revenues.
 
                                       109
<PAGE>   114
 
                                   SIGNATURES
 
     Pursuant to the requirements of Section 15(d) of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.
 
                                          SOUTHWEST GAS CORPORATION
 
                                          By          MICHAEL O. MAFFIE
                                          ------------------------------------
                                                Michael O. Maffie, President
                                                 (Chief Executive Officer)
 
Date: March 28, 1994
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
registrant and in the capacities and on the dates indicated.
 
<TABLE>
<CAPTION>
                  SIGNATURE                                  TITLE                     DATE
<S>                                               <C>                            <C>
               GEORGE C. BIEHL                       Senior Vice President         March 28, 1994
      --------------------------------              (Chief Financial Officer)
              (George C. Biehl)                    
              
               JEFFREY W. SHAW                     Vice President/Controller       March 28, 1994
      --------------------------------             (Chief Accounting Officer)
              (Jeffrey W. Shaw)                    
     
</TABLE>
 
                                       110
<PAGE>   115
 
                                   SIGNATURES
 
     Pursuant to the requirements of Section 15(d) of the Securities Exchange
Act of 1934, the Company has duly caused this report to be signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.
 
<TABLE>
<CAPTION>
                   SIGNATURE                                TITLE                   DATE
- -----------------------------------------------  ----------------------------  ---------------
<S>                                              <C>                           <C>
                     RALPH C. BATASTINI                    Director            March 28, 1994
             --------------------------------
                    (Ralph C. Batastini)
               
                      MANUEL J. CORTEZ                     Director            March 28, 1994
             -------------------------------- 
                     (Manuel J. Cortez)

                       LLOYD T. DYER                       Director            March 28, 1994
             --------------------------------                       
                      (Lloyd T. Dyer)

                    CLARK J. GUILD,  JR.                   Director            March 28, 1994
             --------------------------------                       
                   (Clark J. Guild, Jr.)

                      KENNY C. GUINN                Chairman of the Board      March 28, 1994
             --------------------------------            of Directors
                     (Kenny C. Guinn)
                          
                      THOMAS Y. HARTLEY                    Director            March 28, 1994
             --------------------------------            
                     (Thomas Y. Hartley)

                     MICHAEL B. JAGER                      Director            March 28, 1994
             --------------------------------            
                    (Michael B. Jager)
                    
                      LEONARD R. JUDD                      Director            March 28, 1994
             --------------------------------            
                     (Leonard R. Judd)

                     JAMES R. LINCICOME                    Director            March 28, 1994
             --------------------------------            
                    (James R. Lincicome)

                      MICHAEL O. MAFFIE             President and Director     March 28, 1994
             --------------------------------     (Chief Executive Officer)   
                     (Michael O. Maffie) 
                
                      CAROLYN M. SPARKS                    Director            March 28, 1994
             --------------------------------       
                     (Carolyn M. Sparks)
       
                     ROBERT S. SUNDT                       Director            March 28, 1994
             --------------------------------     
                    (Robert S. Sundt)
</TABLE>
 
                                       111
<PAGE>   116
 
                               GLOSSARY OF TERMS
 
<TABLE>
<S>                  <C>
401k                 -- The Employees' Investment Plan
ACC                  -- Arizona Corporation Commission
AICPA                -- American Institute of Certified Public Accountants
ALCO                 -- Asset/Liability Management Committee
APB                  -- Accounting Principles Board
APS                  -- Arizona Public Service Company
the Bank             -- PriMerit Bank
the Board            -- Southwest Gas Corporation Board of Directors
BOD                  -- The Bank's Board of Directors
CMO                  -- Collateralized Mortgage Obligations
the Company          -- Southwest Gas Corporation
CPN                  -- CP National Corporation
CPUC                 -- California Public Utilities Commission
CRA                  -- Community Reinvestment Act of 1977
El Paso              -- El Paso Natural Gas Company
FASB                 -- Financial Accounting Standards Board
FDIC                 -- Federal Deposit Insurance Corporation
FDICIA               -- Federal Deposit Insurance Corporation Improvement Act of 1991
FERC                 -- Federal Energy Regulatory Commission
FFIEC                -- Federal Financial Institutions Examinations Council
FHA                  -- Federal Housing Authority
FHFB                 -- Federal Housing Finance Board
FHLB                 -- Federal Home Loan Bank
FHLBB                -- Federal Home Loan Bank Board
FHLMC                -- Federal Home Loan Mortgage Corporation
FIRREA               -- Financial Institutions Reform, Recovery and Enforcement Act
flex repos           -- Flexible Reverse Repurchase Agreements
FNMA                 -- Federal National Mortgage Association
FSLIC                -- Federal Savings and Loan Insurance Corporation
GAAP                 -- Generally Accepted Accounting Principles
gas segment          -- Natural Gas Operations Segment
GNMA                 -- Government National Mortgage Association
IDRB                 -- Industrial Development Revenue Bonds
IRR                  -- Interest Rate Risk
ITC                  -- Investment Tax Credit
Kern River           -- Kern River Gas Transmission Company
LDC                  -- Local Distribution Company
LIBOR                -- London Interbank Offering Rate
LNG                  -- Liquefied Natural Gas
LPG                  -- Liquefied Petroleum Gas
MACRO                -- Management, Asset quality, Capital adequacy, Risk
                        management and Operating results
MBS                  -- Mortgage-backed Securities
MD&A                 -- Management's Discussion and Analysis
MVDC                 -- Margarita Village Development Company
MVPE                 -- Market Value of Portfolio Equity
Northwest            -- Northwest Pipeline Corporation
NOW                  -- Negotiable Order of Withdrawal
</TABLE>
 
                                       112
<PAGE>   117
 
<TABLE>
<S>                  <C>
NPV                  -- Net Portfolio Value
Order No. 636        -- Federal Energy Regulatory Commission Order No. 636 and amendments
                     thereto
OTS                  -- Office of Thrift Supervision
Paiute               -- Paiute Pipeline Company
Pataya               -- Pataya Gas Storage Project
PBOP                 -- Postretirement Benefits Other Than Pensions
PEPCON               -- Pacific Engineering & Production Company of Nevada
PGA                  -- Purchased Gas Adjustment
PG&E                 -- Pacific Gas and Electric Company
PSCN                 -- Public Service Commission of Nevada
QTL                  -- Qualified Thrift Lender
REMIC                -- Real Estate Mortgage Investment Conduits
REOF                 -- Real Estate Acquired Through Foreclosure
SAIF                 -- Savings Association Insurance Fund
SEC                  -- Securities and Exchange Commission
SFAS                 -- Statement of Financial Accounting Standards
Sierra               -- Sierra Pacific Power Company
SoCal                -- Southern California Gas Company
SOP                  -- Statement of Position issued by AICPA
TEP                  -- Tucson Electric Power Company
TOP                  -- Take-or-Pay
Tuscarora            -- Tuscarora Gas Transmission Company
VA                   -- Veterans Administration
</TABLE>
 
                                       113

<PAGE>   1
                                                                   EXHIBIT 4.10



                               INDENTURE OF TRUST

                                    Between

                              CLARK COUNTY, NEVADA

                                      and

                         HARRIS TRUST AND SAVINGS BANK,
                                   as Trustee

                                 ______________

                          Dated as of December 1, 1993

                                 ______________

                                  Authorizing

                                  $75,000,000

                              Clark County, Nevada
                      Industrial Development Revenue Bonds
                          (Southwest Gas Corporation)
                                 1993 Series A
<PAGE>   2



                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                            <C>
          Parties   . . . . . . . . . . . . . . . . . . . . . . . . . .   1
          Recitals  . . . . . . . . . . . . . . . . . . . . . . . . . .   1
          Granting Clause   . . . . . . . . . . . . . . . . . . . . . .   2

                                      ARTICLE I

                                     DEFINITIONS

          Section 1.01.  Definitions  . . . . . . . . . . . . . . . . .   3
          Section 1.02.  Number and Gender  . . . . . . . . . . . . . .  11
          Section 1.03.  Articles, Sections, Etc  . . . . . . . . . . .  11
          Section 1.04.  Content of Certificates and Opinions . . . . .  11

                                      ARTICLE II

                                      THE BONDS

          Section 2.01.  Authorization of Bonds; Terms of Bonds . . . .  12
          Section 2.02.  Execution of Bonds . . . . . . . . . . . . . .  13
          Section 2.03.  Transfer and Exchange of Bonds;
                         Book Entry System  . . . . . . . . . . . . . .  14
          Section 2.04.  Bond Register  . . . . . . . . . . . . . . . .  16
          Section 2.05.  Temporary Bonds  . . . . . . . . . . . . . . .  16
          Section 2.06.  Bonds Mutilated, Lost, Destroyed or Stolen . .  17

                                     ARTICLE III

                                  ISSUANCE OF BONDS

          Section 3.01.  Authentication and Delivery of Bonds . . . . .  17
          Section 3.02.  Application of Proceeds of Bonds . . . . . . .  18
          Section 3.03.  Construction Fund  . . . . . . . . . . . . . .  18
          Section 3.04.  Costs of Issuance Fund . . . . . . . . . . . .  19

                                      ARTICLE IV

                                 REDEMPTION OF BONDS

          Section 4.01.  Redemption of Bonds  . . . . . . . . . . . . .  20
          Section 4.02.  Selection of Bonds for Redemption  . . . . . .  23
          Section 4.03.  Notice of Redemption . . . . . . . . . . . . .  23
          Section 4.04.  Partial Redemption of Registered Bonds . . . .  24
          Section 4.05.  Effect of Redemption . . . . . . . . . . . . .  24

                                      ARTICLE V

                                       REVENUES

          Section 5.01.  Pledge and Assignment of Revenues  . . . . . .  25
          Section 5.02.  Bonds Not General Obligations  . . . . . . . .  25
          Section 5.03.  Bond Fund  . . . . . . . . . . . . . . . . . .  25
</TABLE>





                                       i
<PAGE>   3





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>            <C>                                             <C>
          Section 5.04.  Trustee Authorized to Take Actions
                         Under the Agreement  . . . . . . . . . . . . .  26
          Section 5.05.  Investment of Moneys . . . . . . . . . . . . .  26
          Section 5.06.  Assignment to Trustee; Enforcement
                         of Obligations . . . . . . . . . . . . . . . .  26
          Section 5.07.  Repayment to Company . . . . . . . . . . . . .  27
          Section 5.08.  Rebate Fund  . . . . . . . . . . . . . . . . .  27

                                      ARTICLE VI

                               COVENANTS OF THE ISSUER

          Section 6.01.  Payment of Principal and Interest  . . . . . .  27
          Section 6.02.  Extension or Funding of Claims for Interest  .  28
          Section 6.03.  Paying Agents  . . . . . . . . . . . . . . . .  28
          Section 6.04.  Preservation of Revenues . . . . . . . . . . .  28
          Section 6.05.  Compliance with Indenture  . . . . . . . . . .  28
          Section 6.06.  Other Liens  . . . . . . . . . . . . . . . . .  28
          Section 6.07.  Further Assurances . . . . . . . . . . . . . .  29

                                     ARTICLE VII

                                       DEFAULT

          Section 7.01.  Events of Default; Acceleration;
                         Waiver of Default  . . . . . . . . . . . . . .  29
          Section 7.02.  Institution of Legal Proceedings by Trustee  .  31
          Section 7.03.  Application of Moneys Collected by Trustee . .  31
          Section 7.04.  Effect of Delay or Omission to Pursue Remedy .  32
          Section 7.05.  Remedies Cumulative  . . . . . . . . . . . . .  32
          Section 7.06.  Covenant to Pay Bonds in Event of Default  . .  32
          Section 7.07.  Trustee Appointed Agent for Bondholders  . . .  32
          Section 7.08.  Power of Trustee to Control Proceedings  . . .  33
          Section 7.09.  Limitation on Bondholders' Right to Sue  . . .  33
          Section 7.10.  Limitation of Liability to Revenues  . . . . .  34

                                     ARTICLE VIII

                                     THE TRUSTEE

          Section 8.01.  Duties, Immunities and Liabilities
                         of Trustee . . . . . . . . . . . . . . . . . .  34
          Section 8.02.  Right of Trustee to Rely upon Documents, Etc .  36
          Section 8.03.  Trustee Not Responsible for Recitals . . . . .  36
          Section 8.04.  Right of Trustee to Acquire Bonds  . . . . . .  37
          Section 8.05.  Moneys Received by Trustee to Be Held
                         in Trust . . . . . . . . . . . . . . . . . . .  37
          Section 8.06.  Compensation and Indemnification of Trustee  .  37
          Section 8.07.  Qualifications of Trustee  . . . . . . . . . .  38
          Section 8.08.  Resignation and Removal of Trustee
                         and Appointment of Successor Trustee . . . . .  38
</TABLE>





                                       ii
<PAGE>   4





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                            <C>
          Section 8.09.  Acceptance of Trust by Successor Trustee . . .  39
          Section 8.10.  Merger or Consolidation of Trustee . . . . . .  40
          Section 8.11.  Accounting Records and Reports . . . . . . . .  40
          Section 8.12.  Registrars . . . . . . . . . . . . . . . . . .  40
          Section 8.13.  Appointment of Separate or Co-Trustee  . . . .  41
          Section 8.14.  Notices to the Issuer  . . . . . . . . . . . .  42
          Section 8.15.  Special Bondholder Requests  . . . . . . . . .  43

                                      ARTICLE IX

                         MODIFICATION OF INDENTURE, DOCUMENTS

          Section 9.01.  Modification without Consent of Bondholders  .  43
          Section 9.02.  Modification with Consent of Bondholders . . .  45
          Section 9.03.  Effect of Supplemental Indenture . . . . . . .  46
          Section 9.04.  Required and Permitted Opinions of Counsel . .  46
          Section 9.05.  Notation of Modification on Bonds;
                         Preparation of New Bonds . . . . . . . . . . .  46

                                      ARTICLE X

                                      DEFEASANCE

          Section 10.01.  Discharge of Indenture  . . . . . . . . . . .  47
          Section 10.02.  Discharge of Liability on Bonds . . . . . . .  48
          Section 10.03.  Payment of Bonds after Discharge
                          of Indenture  . . . . . . . . . . . . . . . .  48
          Section 10.04.  Deposit of Money or Securities with Trustee .  49

                                      ARTICLE XI

                                    MISCELLANEOUS

          Section 11.01.  Successors of the Issuer  . . . . . . . . . .  50
          Section 11.02.  Limitation of Rights to Parties
                          and Bondholders . . . . . . . . . . . . . . .  50
          Section 11.03.  Waiver of Notice  . . . . . . . . . . . . . .  50
          Section 11.04.  Destruction of Bonds  . . . . . . . . . . . .  50
          Section 11.05.  Separability of Invalid Provisions  . . . . .  50
          Section 11.06.  Governing Law . . . . . . . . . . . . . . . .  50
          Section 11.07.  Notices . . . . . . . . . . . . . . . . . . .  51
          Section 11.08.  Evidence of Rights of Bondholders . . . . . .  51
          Section 11.09.  Waiver of Personal Liability  . . . . . . . .  52
          Section 11.10.  Publication of Notices  . . . . . . . . . . .  53
          Section 11.11.  Execution in Several Counterparts . . . . . .  53
          Section 11.12.  Business Days . . . . . . . . . . . . . . . .  53

          Exhibit A Form of Bond
</TABLE>





                                      iii
<PAGE>   5
                 THIS INDENTURE OF TRUST, made and entered into as of December
1, 1993, by and between CLARK COUNTY, NEVADA, a political subdivision of the
State of Nevada (herein called the "Issuer"), and HARRIS TRUST AND SAVINGS
BANK, a banking corporation organized and existing under the laws of the State
of Illinois with corporate trust offices in Chicago, Illinois, and being
qualified to accept and administer the trusts hereby created (herein called the
"Trustee"),

                              W I T N E S S E T H:

                 WHEREAS, the Issuer is authorized and empowered under the
County Economic Development Revenue Bond Law, Sections 244A.669 to 244A.763,
inclusive, of the Nevada Revised Statutes, as amended (the "Act"), to issue
bonds in accordance with the Act and to use the proceeds thereof for financing
all or part of the cost of acquiring, constructing, improving or equipping any
project, consisting of any land, building, structure, facility, system,
fixture, improvement, appurtenance, machinery, equipment or any combination
thereof or interest therein used by any natural person, partnership, firm,
company, corporation, association, trust, estate, political subdivision, state
agency or any other legal entity, or its legal representative, agent or assigns
in connection with the furnishing of energy including gas;

                 WHEREAS, the Issuer proposes to issue and sell $75,000,000
aggregate principal amount of Clark County, Nevada Industrial Development
Revenue Bonds (Southwest Gas Corporation) 1993 Series A (the "Bonds") upon the
terms and conditions set forth herein, for the purpose of financing the costs
of the acquisition, construction, improvement and equipping of certain
additional real and personal properties, facilities, machinery and equipment
(the "Project") described in Exhibit A to the Financing Agreement, of even date
herewith (the "Financing Agreement"), between the Issuer and Southwest Gas
Corporation, a California corporation qualified to do business in the State of
Nevada (the "Company");

                 WHEREAS, the Issuer, after due investigation and deliberation,
has adopted a resolution approving the issuance of the Bonds to finance the
acquisition and construction of the Project, which Project constitutes a
"project" as defined in the Act;

                 WHEREAS, the Issuer has duly entered into the Financing
Agreement with the Company specifying the terms and conditions of the financing
of the Project by the Company, the lending of the proceeds of the Bonds to the
Company for such purposes and the repayment by the Company of such loan;

                 WHEREAS, in order to provide for the authentication and
delivery of the Bonds, to establish and declare the terms and conditions upon
which the Bonds are to be issued and secured and to secure the payment of the
principal thereof and of the





<PAGE>   6
interest and premium, if any, thereon, the Issuer has authorized the execution
and delivery of this Indenture;

                 WHEREAS, the Bonds issued under this Indenture will be secured
by a pledge and assignment to the Trustee of the Financing Agreement and by
certain other security in accordance with the terms of this Indenture; and

                 WHEREAS, all acts and proceedings required by law necessary to
make the Bonds when executed by the Issuer, authenticated and delivered by the
Trustee and duly issued, the legal, valid and binding special, limited
obligations of the Issuer, and to constitute this Indenture a valid and binding
agreement for the uses and purposes herein set forth, in accordance with its
terms, have been done and taken; and the execution and delivery of this
Indenture have been in all respects duly authorized;

                 NOW, THEREFORE, for and in consideration of these premises and
the mutual covenants herein contained, of the acceptance by the Trustee of the
trusts hereby created, of the purchase and acceptance of the Bonds by the
holders (as hereinafter defined) thereof and for other good and valuable
consideration the receipt and sufficiency of which is hereby acknowledged, in
order to secure the payment of the principal of and premium, if any, and
interest on the Bonds at any time Outstanding (as hereinafter defined) under
this Indenture according to their tenor and effect, and the performance and
observance by the Issuer of all the covenants and conditions expressed or
implied herein and contained in the Bonds, the Issuer does hereby grant,
bargain, sell, convey, mortgage, pledge, assign, create and grant a security
interest in and confirm unto the Trustee, its successors in trust and their
assigns forever, the Trust Estate (as hereinafter defined);

                 TO HAVE AND TO HOLD all the same with all privileges and
appurtenances hereby conveyed and assigned or agreed or intended so to be, to
the Trustee, its successors in trust and their assigns forever;

                 IN TRUST NEVERTHELESS, upon the terms and trusts herein set
forth for the equal and proportionate benefit and security of all holders of
the Bonds issued under and secured by this Indenture without preference,
priority or distinction as to lien of any Bonds over any other Bonds;

                 PROVIDED, HOWEVER, that if, after the right, title and
interest of the Trustee in and to the Trust Estate shall have ceased,
terminated and become void in accordance with Article X hereof, and the
principal of and premium, if any, and interest on the Bonds shall have been
paid to the holders thereof, or funds sufficient for such payment shall have
been provided in accordance with Article X hereof, then and in that case these
presents and the estate and rights hereby granted shall cease, terminate and be
void, and thereupon the Trustee shall cancel and





                                          2
<PAGE>   7
discharge this Indenture and execute and deliver to the Issuer and the Company
such instruments in writing as shall be requisite to evidence the discharge
hereof; otherwise this Indenture to be and remain in full force and effect.

                 THIS INDENTURE OF TRUST FURTHER WITNESSETH, and it is
expressly declared, that all Bonds issued and secured hereunder are to be
issued, authenticated and delivered, and the Trust Estate and the other estate
and rights hereby granted are to be dealt with and disposed of, under, upon and
subject to the terms, conditions, stipulations, covenants, agreements, trusts,
uses and purposes hereinafter expressed, and the Issuer has agreed and
covenanted, and does hereby agree and covenant, with the Trustee and with the
respective holders, from time to time, of the Bonds, as follows:


                                   ARTICLE I

                                  DEFINITIONS

                 Section 1.01.  Definitions.  Unless the context otherwise
requires, the terms defined in this Section 1.01 shall, for all purposes of
this Indenture, any Supplemental Indenture and any certificate, opinion or
other writing executed or delivered pursuant hereto or thereto, have the
meanings herein specified, as follows:

                 "Act" shall mean the County Economic Development Revenue Bond
Law, Sections 244A.669 to 244A.763, inclusive, of the Nevada Revised Statutes,
as amended.

                 "Act of Bankruptcy" of the Company shall mean any of the
following:  (a) the commencement by the Company of a voluntary case under the
federal bankruptcy laws, as now in effect or hereafter amended, or any other
applicable federal or state bankruptcy, insolvency or similar laws, or (b) the
filing of a petition with a court having jurisdiction over the Company to
commence an involuntary case against the Company under the federal bankruptcy
laws, as now in effect or hereafter amended, or any other applicable federal or
state bankruptcy, insolvency or similar laws which has not been discharged
after a period of sixty (60) days, or (c) the Company shall admit in writing
its inability to pay its debts generally as they become due, or (d) a receiver,
trustee or liquidator of the Company shall be appointed in any proceeding
brought against the Company, or (e) assignment by the Company for the benefit
of its creditors, or (f) the entry by the Company into an agreement of
composition with its creditors.

                 "Agreement" or "Financing Agreement" shall mean the Financing
Agreement, of even date herewith, between the Issuer and the Company, as
originally executed or as it may from time to time be supplemented or amended.





                                          3
<PAGE>   8
                 "Authorized Company Representative" shall mean any person who
at the time and from time to time may be designated, by written certificate
furnished by the Company to the Issuer and the Trustee, as the person
authorized to act on behalf of the Company.  Such certificate shall contain the
specimen signature of such person, shall be signed on behalf of the Company by
any one of its President and Chief Executive Officer, Senior Vice President and
Chief Financial Officer or Treasurer and shall designate an alternate or
alternates.

 "Authorized Denomination" shall mean $5,000 or any integral multiple thereof.

                 "Big Bear Lake Project" shall mean the facilities financed
with proceeds of the City of Big Bear Lake Industrial Development Revenue Bonds
(Southwest Gas Corporation Project) 1993 Series A, issued by the City of Big
Bear Lake, California for the benefit of the Company.

                 "Bond Counsel" shall mean any attorney at law or firm of
attorneys, of nationally recognized standing in matters pertaining to the
federal tax exemption of interest on bonds issued by states and political
subdivisions, and duly admitted to practice law before the highest court of any
state of the United States, but shall not include counsel for the Company.

                 "Bond Fund" shall mean the fund established pursuant to
Section 5.03 hereof.

                 "Bondholder" or "holder" shall mean the registered owner of
any Bond.

                 "Bond Purchase Agreement" shall mean the Bond Purchase
Agreement, dated December 1, 1993, by and among the Issuer, the Company and
Smith Barney Shearson Inc., Lehman Brothers Inc. and Grigsby Brandford & Co.,
Inc.

                 "Bonds" shall mean the Clark County, Nevada Industrial
Development Revenue Bonds (Southwest Gas Corporation) 1993 Series A authorized
and issued under this Indenture in an aggregate principal amount of
$75,000,000, the proceeds of which shall be used by the Issuer to make the loan
under the Agreement.

                 "Business Day" shall mean a day on which banks located in the
city in which the Principal Office of the Trustee is located are not required
or authorized to remain closed and on which The New York Stock Exchange is not
closed, and, in the case of any action to be taken by the Company, which is not
a legal holiday in Las Vegas, Nevada.

                 "Certificate of the Issuer" shall mean a certificate signed by
the Chairman of the Board of County Commissioners of the Issuer or by an
officer of the Issuer designated by a certificate signed by said Chairman.  If
and to the extent required by the provisions of Section 1.04, each Certificate
of





                                          4
<PAGE>   9
the Issuer shall include the statements provided for in Section 1.04.

                 "Certified Resolution" shall mean a copy of a resolution of
the Issuer certified by the County Clerk of the Issuer to have been duly
adopted by the Issuer and to be in full force and effect on the date of such
certification.

                 "Code" shall mean the Internal Revenue Code of 1986.

                 "Company" shall mean (i) Southwest Gas Corporation, a
corporation organized under the laws of the State of California, and its
successors and assigns, and (ii) any surviving, resulting or transferee
corporation as provided in Section 5.2 of the Agreement.

                 "Completion Date" shall mean the date of completion of the
Project as that date shall be certified as provided in Section 3.4 of the
Agreement.

                 "Construction Fund" shall mean the fund established pursuant
to Section 3.03 hereof.

                 "Construction Period" shall mean the period during which
interest for any portion of the Project may be capitalized for federal income
tax purposes.

                 "Costs of Issuance" shall mean the initial or acceptance fee
of the Trustee; the fees of the Trustee as such Trustee and as registrar and
paying agent, incurred during the Construction Period, including, without
limitation, the reasonable fees and expenses of its counsel; the Issuer's
issuance fees; legal, underwriting, financial consulting, engineering
consulting, accounting and rating agency fees and expenses and printing and
engraving costs incurred in connection with the authorization, sale and
issuance of the Bonds, the execution of this Indenture and the preparation of
all other documents in connection therewith; all fees, costs and expenses
incurred with respect to the preparation of this Indenture, the Financing
Agreement, the Bonds, and all other documents in connection therewith, and all
other expenses which are "costs of issuance" within the meaning of Section
147(g) of the Code.

                 "Costs of Issuance Fund" shall mean the fund established
pursuant to Section 3.04 hereof.

                 "Cost of the Project" shall mean all costs related to the
acquisition, construction, reconstruction, repair, alteration, improvement,
equipment and extension of the Project for which disbursement may be made from
the Construction Fund pursuant to Section 3.3 of the Financing Agreement.

                 "Determination of Taxability" shall mean (i) a determination
that the interest payable on any Bond is not Tax-exempt to the owner thereof
(other than an owner of any Bond





                                          5
<PAGE>   10
who is a "substantial user" of the Project or the Big Bear Lake Project or a
"related person" within the meaning of Section 147(a) of the Code) by a final
administrative determination of the Internal Revenue Service or judicial
decision of a court of competent jurisdiction in a proceeding of which the
Company received notice and was afforded an opportunity to participate to the
full extent permitted by law or (ii) a letter from Bond Counsel delivered to
the Company to the effect that, as a result of an event occurring or to occur
or action taken or to be taken by the Issuer after the Issue Date, such counsel
would be unable to opine that interest on the Bonds would be excluded from
gross income for federal income tax purposes if the Bonds remained Outstanding
following the occurrence of such event or the taking of such action; provided,
however, that a Determination of Taxability shall not result from any change
after the Issue Date in any applicable law governing the treatment of interest
on the Bonds for determination of federal income tax liabilities.  The
Determination of Taxability shall be deemed to occur as of the date specified
in the foregoing determination, decision or letter.  A determination or
decision under clause (i) above will not be considered final for purposes of
the preceding sentence unless (A) the holder or holders of the Bonds involved
in the proceeding in which the issue is raised (I) shall have given the Company
and the Trustee prompt notice of the commencement thereof and (II) shall have
offered the Company the opportunity to control the proceeding, to the extent
that the Company is permitted by law to do so; provided the Company agrees to
pay all expenses in connection therewith and to indemnify such holder or
holders against all liability for such expenses (except that any such holder
may engage separate counsel, and the Company shall not be liable for the fees
or expenses of such counsel); and (B) such proceeding shall not be subject to a
further right of appeal or shall not have been timely appealed.

                 "Event of Default" as used herein shall have the meaning
specified in Section 7.01 hereof, and as used in the Agreement shall have the
meaning specified in Section 6.1 thereof.

                 "Indenture" shall mean this Indenture of Trust, as originally
executed or as it may from time to time be supplemented, modified or amended by
any Supplemental Indenture entered into pursuant to the provisions hereof.

                 "Information Services" shall mean Financial Information,
Inc.'s "Daily Bond Service," 30 Montgomery Street, 10th Floor, Jersey City, New
Jersey 07302, Attention:  Editor; Kenney Information Services' "Called Bond
Service," 65 Broadway, 16th Floor, New York, New York 10006; Moody's "Municipal
and Government," 99 Church Street, 8th Floor, New York, New York 10007,
Attention:  Municipal News Reports; Municipal Securities Rulemaking Board, CDI
Pilot, 1640 King Street, Suite 300, Alexandria, Virginia 22314; and Standard
and Poor's "Called Bond Record," 25 Broadway, 3rd Floor, New York, New York
10004; or, in accordance with then current guidelines of the Securities and





                                          6
<PAGE>   11
Exchange Commission, to such other addresses and/or such other services
providing information with respect to called bonds, or no such services, as the
Issuer may designate in a Certificate of the Issuer delivered to the Trustee.

                 "Interest Payment Date" shall mean June 1 and December 1 of
each year, commencing June 1, 1994, until and including the date of maturity of
the Bonds.

                 "Investment Securities" shall mean any of the following:  (1)
Permitted Investments; (2) obligations, debentures, notes or other evidence of
indebtedness issued or guaranteed by any of the following: Federal Home Loan
Bank Board, Federal Farm Credit Bank, Government National Mortgage Association,
Farmer's Home Administration, or Federal Home Loan Mortgage Corporation; (3)
obligations of any state or local government the interest on which is exempt
from federal income taxation for which a nationally recognized rating service
is maintaining a rating within the top two ratings of such rating service; (4)
repurchase agreements with reputable financial institutions fully secured by
collateral security actually delivered to the Trustee described in clauses (1)
or (2) of this definition continuously having a market value at least equal to
102% of the amount so invested; (5) bankers' acceptances issued by a bank
(including the Trustee and its affiliates) rated Aa or better by Moody's or
rated AA or better by S&P and eligible for purchase by the Federal Reserve
Bank; (6) interest-bearing demand or time deposits (including certificates of
deposit) in banks (including the Trustee and its affiliates) and savings and
loan associations, provided such deposits are (a) secured at all times, in the
manner and to the extent provided by law, by collateral security (described in
clauses (1) or (2) of this definition) having a market value of no less than
102% of the amount of moneys so invested or (b) fully insured by Federal
deposit insurance; (7) investment in or shares of any "regulated investment
company" within the meaning of Section 851(a) of the Code, the assets of which
are securities or investments described in clauses (1) through (6) above; and
(8) commercial paper (including both non-interest-bearing discount obligations
and interest-bearing obligations payable on demand or on a specified date not
more than one year after the date of issuance thereof) which have been assigned
the rating of at least A-1 by S&P and at least P-1 by Moody's at the time of
such investment; or other obligations of corporations which have been assigned
the rating of at least AA by S&P and at least Aa by Moody's at the time of such
investment.

                 "Issue Date" means December 15, 1993.

                 "Issuer" shall mean Clark County, Nevada, the issuer of the
Bonds hereunder.

                 "Moody's" shall mean Moody's Investors Service, a corporation
organized and existing under the laws of the State of Delaware, its successors
and their assigns, and if such





                                          7
<PAGE>   12
corporation shall be dissolved or liquidated or shall no longer perform the
functions of a securities rating agency, "Moody's" shall be deemed to refer to
any other nationally recognized securities rating agency designated by the
Trustee, at the written direction of the Company.

                 "Notice by Mail" or "notice" of any action or condition "by
Mail" shall mean a written notice meeting the requirements of this Indenture
mailed by first-class mail to the holders of specified registered Bonds, at the
addresses shown on the registration books maintained pursuant to Section 2.04
hereof as of a date not more than five (5) Business Days before such notice is
given, or to such other persons as may be specified hereunder; provided,
however, that if, because of the temporary or permanent suspension of delivery
of first-class mail or for any other reason, it is impossible or impracticable
to give such notice by first-class mail, the Notice by Mail shall mean such
giving of notice in lieu thereof, which may be made by publication, as shall be
made with the approval of the Trustee (or if there be no trustee hereunder, the
Issuer).

                 "Opinion of Counsel" shall mean a written opinion of counsel
(who may not be counsel for the Company) acceptable to the Issuer, the Trustee
and the Company.  If and to the extent required by the provisions of Section
1.04, each Opinion of Counsel shall include the statements provided for in
Section 1.04.

                 "Outstanding," when used as of any particular time with
reference to Bonds, shall, subject to the provisions of Section 11.08(d), mean
all Bonds theretofore authenticated and delivered by the Trustee under this
Indenture except:

                 (a)      Bonds theretofore cancelled by the Trustee or
         surrendered to the Trustee for cancellation;

                 (b)      Bonds in lieu of or in substitution for which other
         Bonds shall have been authenticated and delivered by the Trustee
         pursuant to the terms of Section 2.06; and

                 (c)      Bonds with respect to which the liability of the
         Issuer and the Company have been discharged to the extent provided in,
         and pursuant to the requirements of, Section 10.02.

                 "Permitted Investments" shall mean (i) direct obligations of
the United States of America (including obligations issued or held in
book-entry form on the books of the Department of the Treasury of the United
States of America); (ii) obligations the timely payment of the principal of and
interest on which are fully guaranteed by the United States of America; (iii)
money market funds registered under the Investment Company Act of 1940, as
amended, whose shares are registered under the Securities Act of 1933, as
amended, which invest only in securities of the type described in clause (i) or
(ii) of this





                                          8
<PAGE>   13
definition and having a rating by S&P of AAAm-G, AAAm, or AAm and by Moody's of
Aaa or P-1; or (iv) certificates or receipts representing direct ownership
interests in future interest or principal payments on obligations described in
clause (i) or (ii) of this definition which are held by a custodian in
safekeeping on behalf of the holders of such certificates or receipts.

                 "Person" shall mean an individual, a corporation, a
partnership, a trust, an unincorporated organization or a government or any
agency or political subdivision thereof.

                 "Principal Office" of the Trustee shall mean the principal
corporate trust office of the Trustee initially located at the address set
forth in Section 11.07 hereof, or at such other address as may be designated
pursuant to said Section.

                 "Project" shall mean those facilities, including real
property, structures, buildings, fixtures or equipment, described in Exhibit A
to the Agreement, which facilities are to be financed, in whole or in part,
from the proceeds of the sale of the Bonds, and any real property, structures,
buildings, fixtures or equipment acquired in substitution for, as a renewal or
replacement of, or a modification or improvement to, all or any part of the
facilities described in said Exhibit A.

                 "Qualified Newspaper" shall include The Wall Street Journal
and The Bond Buyer and any other newspaper or journal containing financial
news, printed in the English language and customarily published on each
business day, of general circulation in New York, New York, and selected by the
Trustee, whose decision shall be final and conclusive.

                 "Rebate Amount" shall mean the amount directed by the Company
to be remitted to the United States Government from time to time pursuant to
the Tax Certificate.

                 "Rebate Fund" shall mean the fund established pursuant to 
Section 5.08 hereof.

                 "Record Date" shall mean the close of business at the
Principal Office of the Trustee on the fifteenth day of the calendar month
preceding an Interest Payment Date.

                 "Repayment Installment" shall mean any amount that the Company
is required to pay directly to the Trustee pursuant to Section 4.2(a) of the
Agreement as a repayment of the loan made by the Issuer under the Agreement,
which amount is determined in accordance with Section 4.2(a) thereof.

                 "Responsible Officer" of the Trustee shall mean and include
the Chairman of the Board of Directors, the President, every Vice President and
every Assistant Vice President.

                 "Revenues" shall mean all income derived by the Issuer or the
Trustee with respect to the Bonds under the Agreement, and





                                          9
<PAGE>   14
any income or revenue derived from the investment of any money in any fund or
account established pursuant to this Indenture, including all Repayment
Installments and any other payments made by the Company with respect to the
Bonds pursuant to the Agreement; but such term shall not include payments to
the Issuer or the Trustee pursuant to Sections 4.2(b), 4.2(c), 6.3, 8.2 and 8.3
of the Agreement and amounts on deposit in the Rebate Fund or payments made to
the Trustee for deposit in the Rebate Fund.

                 "S&P" shall mean Standard & Poor's Corporation, a corporation
organized and existing under the laws of the State of New York, its successors
and their assigns, and if such corporation shall be dissolved or liquidated or
shall no longer perform the functions of a securities rating agency, "S&P"
shall be deemed to refer to any other nationally recognized securities rating
agency designated by the Trustee, at the written direction of the Company.

                 "Securities Depositories" shall mean:  The Depository Trust
Company, 711 Stewart Avenue, Garden City, New York 11530, Fax-(516) 227-4039 or
4190; Midwest Securities Trust Company, Capital Structures-Call Notification,
440 South LaSalle Street, Chicago, Illinois 60605, Fax-(312) 663-2343;
Philadelphia Depository Trust Company, Reorganization Division, 1900 Market
Street, Philadelphia, Pennsylvania 19103, Attention:  Bond Department,
Fax-(215) 496-5058; or, in accordance with then-current guidelines of the
Securities and Exchange Commission, to such other addresses and/or such other
securities depositories, or no such depositories, as the Issuer may designate
in a certificate of the Issuer delivered to the Trustee.

                 "Supplemental Indenture" or "indenture supplemental hereto"
shall mean any indenture hereafter duly authorized and entered into between the
Issuer and the Trustee in accordance with the provisions of this Indenture.

                 "Tax Certificate" shall mean the Tax Certificate and
Agreement, dated the Issue Date, between the Issuer and the Company.

                 "Tax-exempt" shall mean, with respect to interest on any
obligations of a state or local government, including the Bonds, that such
interest is excluded from gross income for federal income tax purposes, whether
or not such interest is includable as an item of tax preference or otherwise
includable directly or indirectly for purposes of calculating other tax
liabilities, including any alternative minimum tax or environmental tax under
the Code.

                 "Trust Estate" shall mean (i) the proceeds of the Bonds; (ii)
all Revenues; (iii) all amounts (including money and securities) held in any
funds or accounts hereunder, except the Rebate Fund; (iv) the Financing
Agreement and the rights and privileges of the Issuer thereunder which are
assigned to the





                                          10
<PAGE>   15
Trustee pursuant to Section 5.06 hereof; and (v) any other property rights,
money, securities or other assets pledged or assigned by the Issuer to the
Trustee pursuant hereto.

                 "Trustee" shall mean Harris Trust and Savings Bank, a banking
corporation organized and existing under the laws of the State of Illinois,
together with any successor trustee appointed as Trustee pursuant to Section
8.08.

                 "Written Consent of the Issuer," "Written Order of the
Issuer," "Written Request of the Issuer" and "Written Requisition of the
Issuer" shall mean, respectively, a written consent, order, request or
requisition signed by or on behalf of the Issuer by the Chairman of the Board
of County Commissioners of the Issuer or by an officer of the Issuer designated
by a certificate signed by said Chairman.

                 Section 1.02.  Number and Gender.  The singular form of any
word used herein, including the terms defined in Section 1.01, shall include
the plural, and vice versa.  The use herein of a word of any gender shall
include all genders.

                 Section 1.03.  Articles, Sections, Etc.  All references herein
to "Articles," "Sections" and other subdivisions are to the corresponding
Articles, Sections or subdivisions of this Indenture as originally executed;
and the words "herein," "hereof," "hereunder" and other words of similar import
refer to this Indenture as a whole and not to any particular Article, Section
or subdivision hereof.  The headings or titles of the several Articles and
Sections hereof, and any table of contents appended to copies hereof, shall be
solely for convenience of reference and shall not affect the meaning,
construction or effect of this Indenture.

                 Section 1.04.  Content of Certificates and Opinions.  Every
certificate or opinion with respect to compliance with a condition or covenant
provided for in this Indenture or the Agreement shall include (a) a statement
that the person or persons making or giving such certificate or opinion have
read such covenant or condition and the definitions herein relating thereto;
(b) a brief statement as to the nature and scope of the examination or
investigation upon which the statements or opinions contained in such
certificate or opinion are based; (c) a statement that, in the opinion of the
signers, they have made or caused to be made such examination or investigation
as is necessary to enable them to express an informed opinion as to whether or
not such covenant or condition has been complied with; and (d) a statement as
to whether, in the opinion of the signers, such condition or covenant has been
complied with.

                 Any such certificate or opinion made or given by an officer of
the Issuer may be based, insofar as it relates to legal matters, upon a
certificate or opinion of or representations by counsel, unless such officer
knows that the certificate or opinion or representations with respect to the





                                          11
<PAGE>   16
matters upon which his certificate or opinion may be based as aforesaid are
erroneous, or in the exercise of reasonable care should have known that the
same were erroneous.  Any such certificate or opinion made or given by counsel
may be based, insofar as it relates to factual matters (with respect to which
information is in the possession of the Issuer), upon the certificate or
opinion of or representations by an officer of the Issuer, unless such counsel
knows that the certificate or opinion or representations with respect to the
matters upon which his opinion may be based as aforesaid are erroneous, or in
the exercise of reasonable care should have known that the same were erroneous.


                                   ARTICLE II

                                   THE BONDS

                 Section 2.01.  Authorization of Bonds; Terms of Bonds.  The
Bonds to be issued under this Indenture are hereby authorized and such Bonds
are designated as the "Clark County, Nevada Industrial Development Revenue
Bonds (Southwest Gas Corporation) 1993 Series A", limited in aggregate
principal amount to Seventy-Five Million Dollars ($75,000,000) exclusive of
Bonds executed and authenticated as provided in Section 2.06.  The Bonds shall
be issued as fully registered Bonds, without coupons, in Authorized
Denominations.  The Bonds and the certificate of authentication to be endorsed
thereon shall be in substantially the respective forms set forth in Exhibit A
hereto with necessary or appropriate variations, omissions and insertions, as
permitted or required by this Indenture.

                 Pursuant to recommendations promulgated by the Committee on
Uniform Security Identification Procedures, "CUSIP" numbers may be printed on
the Bonds.  The Bonds may bear such endorsement or legend relating thereto as
may be satisfactory to the Trustee and as may be required to conform to usage
or law with respect thereto.  The Bonds may be printed with a portion of the
text printed on the reverse side of the Bonds and with a legend printed on the
front referring to such text.

                 The Bonds shall be dated as of December 1, 1993, and shall
mature on December 1, 2033, subject to prior redemption, upon the terms and
conditions hereinafter set forth, and shall bear interest at the rate of 6.50%
per annum, payable on each Interest Payment Date.

                 The Bonds shall be numbered consecutively from 1 upward.  The
Bonds shall bear interest from and including the Interest Payment Date next
preceding the date of authentication and registration thereof, unless (i) they
are authenticated and registered as of an Interest Payment Date, in which event
they shall bear interest from and including the date of authentication and
registration thereof, or (ii) they are registered and authenticated before the
first Interest Payment Date, in which





                                          12
<PAGE>   17
event they shall bear interest from and including their date; provided,
however, that if, as shown by the records of the Trustee, interest on the Bonds
shall be in default, Bonds issued in exchange for Bonds surrendered for
transfer or exchange shall bear interest from the last date to which interest
has been paid in full or duly provided for on the Bonds, or, if no interest has
been paid or duly provided for on the Bonds, from their date.  The Bonds shall
bear interest until payment of the principal or redemption price thereof shall
have been made or provided for in accordance with the provisions hereof,
whether at maturity, upon redemption or otherwise.  Interest on the Bonds shall
be computed upon the basis of a 360-day year, consisting of twelve 30-day
months.

                 Payment of the interest on any Bond shall be made to the
person appearing on the bond registration books of the Trustee as the holder
thereof on the Record Date, such interest to be paid by the Trustee to such
holder by check or draft mailed on the Interest Payment Date, to such holder's
address as it appears on the registration books of the Trustee or at such other
address as has been furnished to the Trustee in writing by such holder, such
check or draft (or accompanying notice) to reflect the appropriate CUSIP number
and appropriate dollar amounts for each CUSIP number related to such interest
payment; except, in each case, that if and to the extent that there shall be a
default in the payment of the interest due on such Interest Payment Date, such
defaulted interest shall be paid to the holders in whose name any such Bonds
are registered at the close of business on the Business Day next preceding the
date of payment of such defaulted interest.  Notwithstanding the foregoing, the
Trustee will, at the request of any registered owner of $1,000,000 or more in
aggregate principal amount of Bonds, make payments of interest on such Bonds by
wire transfer in immediately available funds to the account designated by such
owner to the Trustee in writing at least two (2) Business Days before the
Record Date for such payments, any such designation to remain in effect until
withdrawn.  Both the principal of and premium, if any, on the Bonds shall be
payable upon surrender thereof in lawful money of the United States of America
at the Principal Office of the Trustee.

                 The Bonds shall be subject to redemption as provided in
Article IV.

                 Section 2.02.  Execution of Bonds.  The Bonds shall be signed
in the name and on behalf of the Issuer with the manual or facsimile signature
of the Chairman of the Board of County Commissioners of the Issuer and the
manual or facsimile signature of the Treasurer of the Issuer, under the seal of
the Issuer, attested by the manual or facsimile signature of the County Clerk
of the Issuer.  Such seal may be in the form of a facsimile of the Issuer's
seal and may be imprinted or impressed upon the Bonds.  The Bonds shall then be
delivered to the Trustee for authentication by it.  In case any officer who
shall have signed any of the Bonds shall cease for any reason to be such
officer





                                          13
<PAGE>   18
before the Bonds so signed or attested shall have been authenticated or
delivered by the Trustee or issued by the Issuer, such Bonds may nevertheless
be authenticated, delivered and issued and, upon such authentication, delivery
and issuance, shall be as binding upon the Issuer as though those who signed
and attested the same had continued to be such officers of the Issuer.  Also,
any Bond may be signed on behalf of the Issuer by such persons as on the actual
date of the execution of such Bond shall be the proper officers although on the
nominal date of such Bond any such person shall not have been such officer.

                 Only such of the Bonds as shall bear thereon a certificate of
authentication in the form recited in Exhibit A hereto, manually executed by
the Trustee, shall be valid or obligatory for any purpose or entitled to the
benefits of this Indenture, and such certificate of the Trustee shall be
conclusive evidence that the Bonds so authenticated have been duly
authenticated and delivered hereunder and are entitled to the benefits of this
Indenture.

                 Section 2.03.  Transfer and Exchange of Bonds; Book Entry
System.  The Bonds shall be initially issued in the form of a separate single
fully registered Bond.  Upon initial issuance, the ownership of such Bond shall
be registered in the books maintained for the registration and transfer of
Bonds by the Trustee pursuant to Section 2.04 hereof, in the name of Cede &
Co., or any successor thereto ("Cede"), as nominee of The Depository Trust
Company, New York, New York, and its successors and assigns ("DTC").

                 With respect to the Bonds registered in the name of Cede, as
nominee of DTC, in the books maintained for the registration and transfer of
Bonds by the Trustee, the Issuer and the Trustee shall have no responsibility
or obligation to any broker-dealer, bank or other financial institution for
which DTC holds Bonds from time to time as securities depositary (each such
broker-dealer, bank or other financial institution being referred to herein as
a "DTC Participant") or to any person on behalf of whom such a DTC Participant
holds an interest in Bonds registered in the name of Cede.  Without limiting
the immediately preceding sentence, the Issuer and the Trustee shall have no
responsibility or obligation with respect to (i) the accuracy of the records of
DTC, Cede or any DTC Participant with respect to any ownership interest in the
Bonds, (ii) the delivery to any DTC Participant or any other person, other than
a registered owner of a Bond as shown in the books maintained for the
registration and transfer of Bonds by the Trustee, of any notice with respect
to the Bonds, including any notice of redemption or mandatory purchase, or
(iii) the payment to any DTC Participant or any other person, other than a
registered owner of a Bond as shown in the books maintained by the Trustee for
the registration and transfer of Bonds, of any amount with respect to principal
of, premium, if any, or interest on the Bonds.  The Issuer and the Trustee may
treat and consider the person in whose name a Bond is registered in the books
maintained for the registration and transfer of





                                          14
<PAGE>   19
Bonds by the Trustee as the holder and absolute owner of such Bond for the
purpose of payment of principal of, premium, if any, and interest on such Bond,
for the purpose of giving notices of redemption and other matters with respect
to such Bond, for the purpose of registering transfers with respect to such
Bond, and for all other purposes whatsoever.  The Trustee shall pay all
principal of, premium, if any, and interest on the Bonds, only to or upon the
order of the respective registered owners of the Bonds, as of each Record Date,
as shown in the books maintained for the registration and transfer of Bonds by
the Trustee, or their respective attorneys duly authorized in writing, and all
such payments shall be valid and effective to fully satisfy and discharge the
Issuer's obligations with respect to payment of principal of, premium, if any,
and interest on the Bonds to the extent of the sum or sums so paid.  No person
other than a registered owner of a Bond, as of each Record Date, as shown in
the books maintained for the registration and transfer of Bonds by the Trustee,
shall receive a Bond certificate evidencing the obligation of the Issuer to
make payments of principal of, premium, if any, and interest on any Bond.  Upon
delivery by DTC to the Trustee of written notice to the effect that DTC has
determined to substitute a new nominee in place of Cede, and subject to the
provisions in Section 2.01 hereof with respect to the payment of interest to
the registered owners of Bonds at the close of business on the Record Date next
preceding the applicable Interest Payment Date, the name "Cede" in this
Indenture shall refer to such new nominee of DTC.

                 The Issuer and the Trustee shall be entitled to treat the
person in whose name any Bond is registered as the Bondholder thereof for all
purposes of this Indenture and any applicable laws, notwithstanding any notice
to the contrary received by the Trustee or the Issuer; and the Issuer and the
Trustee shall have no responsibility for transmitting payments to,
communicating with, notifying or otherwise dealing with any beneficial owners
of the Bonds.  Neither the Issuer nor the Trustee will have any responsibility
or obligations, legal or otherwise, to the beneficial owners or to any other
party including DTC or its successor (or substitute depository or its
successor), except for the holder of any Bond.

                 So long as all outstanding Bonds are registered in the name of
"Cede & Co." or its registered assign, the Issuer and the Trustee shall
cooperate with "Cede & Co.", as sole registered Bondholder, and its registered
assigns in effecting payment of the principal of, redemption premium, if any,
and interest on the Bonds by arranging for payment in such manner that funds
for such payments are properly identified and are made immediately available on
the date they are due.

                 In the event that (i) the Company determines to discontinue
the services of DTC, or (ii) the agreement among the Issuer, the Trustee and
DTC evidenced by any such representation letter shall be terminated for any
reason, the Issuer shall notify DTC and DTC Participants of the availability
through DTC





                                          15
<PAGE>   20
of Bond certificates and the Bonds shall no longer be restricted to being
registered in the books maintained for the registration and transfer of Bonds
by the Trustee in the name of Cede, as nominee of DTC.  At that time the
Company may determine that the Bonds shall be registered in the name of and
deposited with such other depository operating a universal book-entry system,
as may be reasonably acceptable to the Issuer, or such depository's agent or
designee, and if the Company does not select such alternate universal
book-entry system, then the Bonds may be registered in whatever name or names
registered owners of Bonds transferring or exchanging Bonds shall designate.

                 Any Bond may, in accordance with the terms of this Indenture,
be transferred, upon the books of the Trustee required to be kept pursuant to
the provisions of Section 2.04, by the person in whose name it is registered,
in person or by his duly authorized attorney, upon surrender of such Bond for
cancellation, accompanied by a written instrument of transfer in a form
approved by the Trustee, duly executed.  Whenever any Bond shall be surrendered
for transfer, the Issuer shall execute and the Trustee shall authenticate and
deliver a new Bond or Bonds of like tenor, in an Authorized Denomination, for
the same aggregate principal amount.  No transfers of Bonds shall be required
to be made (a) during the period commencing seven (7) Business Days preceding
the giving of any notice of redemption and ending on the date such notice is
given, or (b) after any Record Date and prior to the related Interest Payment
Date.

                 Bonds may be exchanged at the Principal Office of the Trustee
for a like aggregate principal amount of Bonds of Authorized Denominations of
like tenor.  The Trustee shall require the payment by the Bondholder requesting
such exchange of any tax or other governmental charge required to be paid with
respect to such exchange, and there shall be no other charge to any Bondholders
for any such exchange.  No exchange of Bonds shall be required to be made (a)
during the period commencing seven (7) Business Days preceding the giving of
any notice of redemption and ending on the date such notice is given, or (b)
after any Record Date and prior to the related Interest Payment Date.

                 Section 2.04.  Bond Register.  The Trustee will keep or cause
to be kept at its Principal Office sufficient books for the registration and
transfer of the Bonds, which shall at all times during the Trustee's normal
business hours be open to inspection by the Issuer and the Company; and, upon
presentation for such purpose, the Trustee shall, under such reasonable
regulations as it may prescribe, register or transfer or cause to be registered
or transferred, on said books, Bonds as hereinbefore provided.

                 Section 2.05.  Temporary Bonds.  The Bonds may be issued
initially in temporary form exchangeable for definitive Bonds when ready for
delivery.  Both the temporary Bonds and the definitive Bonds may be printed,
lithographed or typewritten.  The temporary Bonds shall be in Authorized
Denominations and may





                                          16
<PAGE>   21
contain such reference to any of the provisions of this Indenture as may be
appropriate.  Every temporary Bond shall be executed by the Issuer and be
authenticated and registered by the Trustee upon the same conditions and in
substantially the same manner as the definitive Bonds.  If the Issuer issues
temporary Bonds, it will execute and furnish definitive Bonds without delay,
and thereupon the temporary Bonds may be surrendered, for cancellation, in
exchange therefor at the Principal Office of the Trustee, and the Trustee shall
authenticate and deliver in exchange for such temporary Bonds an equal
aggregate principal amount of definitive Bonds of Authorized Denominations of
like tenor.  Until so exchanged, the temporary Bonds shall be entitled to the
same benefits under this Indenture as definitive Bonds authenticated and
delivered hereunder.

                 Section 2.06.  Bonds Mutilated, Lost, Destroyed or Stolen.  If
any Bond shall become mutilated, the Issuer, at the expense of the holder of
said Bond, shall execute, and the Trustee shall thereupon authenticate and
deliver, a new Bond of like tenor in an Authorized Denomination, in exchange
and substitution for the Bond so mutilated, but only upon surrender to the
Trustee of the Bond so mutilated.  Every mutilated Bond so surrendered to the
Trustee shall be cancelled by it and delivered to, or upon the order of, the
Issuer.  If any Bond issued hereunder shall be lost, destroyed or stolen,
evidence of such loss, destruction or theft may be submitted to the Issuer, the
Company and the Trustee, and if such evidence be satisfactory to them and
indemnity satisfactory to them shall be given, the Issuer, at the expense of
the holder, shall execute, and the Trustee shall thereupon authenticate and
deliver, a new Bond of like tenor, in an Authorized Denomination, in lieu of
and in substitution for the Bond so lost, destroyed or stolen (or if any such
Bond shall have matured or shall be about to mature, instead of issuing a
substitute Bond the Trustee may pay the same without surrender thereof).  The
Issuer may require payment of a reasonable fee for each new Bond issued under
this Section and payment of the expenses which may be incurred by the Issuer
and the Trustee.  Any Bond issued under the provisions of this Section in lieu
of any Bond alleged to be lost, destroyed or stolen shall constitute an
original additional contractual obligation on the part of the Issuer whether or
not the Bond so alleged to be lost, destroyed or stolen be at any time
enforceable by anyone, and shall be equally and proportionately entitled to the
benefits of this Indenture with all other Bonds secured by this Indenture.


                                  ARTICLE III

                               ISSUANCE OF BONDS

                 Section 3.01.  Authentication and Delivery of Bonds.
Forthwith upon the execution and delivery of this Indenture, upon the execution
of the Bonds by the Issuer and delivery thereof to the Trustee, as hereinabove
provided, and without any further





                                          17
<PAGE>   22
action on the part of the Issuer, the Trustee shall authenticate the Bonds in
an aggregate principal amount not exceeding Seventy-Five Million Dollars
($75,000,000) and shall deliver the Bonds to or upon the Written Order of the
Issuer.

                 Section 3.02.  Application of Proceeds of Bonds.  The proceeds
received by the Issuer from the sale of the Bonds shall be deposited with the
Trustee, who shall forthwith set aside such proceeds as follows:

                 (a) $189,583.33 of the proceeds of the sale of the Bonds,
representing the amount received upon delivery of such Bonds as accrued
interest, shall be deposited in the Bond Fund established pursuant to Section
5.03 hereof;

                 (b) $1,490,625 of the proceeds of the sale of the Bonds shall
be deposited in the Costs of Issuance Fund established pursuant to Section 3.04
hereof; and

                 (c) the balance of the proceeds of the sale of the Bonds shall
be deposited in the Construction Fund established pursuant to Section 3.03
hereof.

                 Section 3.03.  Construction Fund.  There is hereby created and
established with the Trustee a trust fund in the name of the Issuer to be
designated "Clark County, Nevada Industrial Development Revenue Bonds
(Southwest Gas Corporation) 1993 Series A Construction Fund."  The moneys in
the Construction Fund shall be held by the Trustee in trust and applied to the
payment of the Cost of the Project.  Such moneys may be transferred to the
account of the Bond Fund and used for the payment of interest becoming due and
payable on the Bonds during the Construction Period, and shall be so used if
and to the extent that the Trustee is so directed by a requisition conforming
with the requirements of this Section and Section 3.3 of the Agreement.

                 Before each payment is made from the Construction Fund by the
Trustee, there shall be filed with the Trustee a requisition conforming with
the requirements of this Section and Section 3.3 of the Agreement, stating with
respect to each payment to be made:

                          (1)     the requisition number;

                          (2)     the name and address of the person to whom
                 payment is due;

                          (3)     the purpose for which such payment is to be
                 made;

                          (4)     the amount to be paid;

                          (5)     that each obligation mentioned therein has
                 been properly incurred and is a proper charge against the
                 Construction Fund;





                                          18
<PAGE>   23
                          (6)     that none of the items for which payment is
                 requested has been previously reimbursed from the Construction
                 Fund; and

                          (7)     that each item for which payment is requested
                 is or was necessary in connection with the acquisition,
                 construction, installation or financing of the Project.

                 Each such requisition shall be sufficient evidence to the
Trustee of the facts stated therein.  Upon receipt of each such requisition,
the Trustee shall pay the amount set forth therein as directed by the terms
thereof.

                 The Construction Fund shall be closed upon the earlier of:
(a) the disbursement of all moneys held therein or (b) the receipt by the
Trustee of a certificate conforming with the requirements of Section 3.4 of the
Agreement.  In the event that the Trustee shall receive a certificate described
in clause (b) of the immediately proceeding sentence, and after payment of
costs payable from the Construction Fund or provision satisfactory to the
Trustee having been made for payment of such costs not yet due as provided in
such certificate, the Trustee shall transfer any remaining balance in the
Construction Fund into a separate account within the Bond Fund, which the
Trustee shall establish and hold in trust, and which shall be entitled the
"Surplus Account."  There shall also be deposited into the Surplus Account
amounts received from the Company pursuant to Section 3.4 of the Agreement for
the purpose of redeeming Bonds in the next largest principal amount divisible
by Authorized Denominations.  The moneys in the Surplus Account shall be used
and applied (unless some other application of such moneys is requested by the
Company and would not, in the opinion of Bond Counsel, cause interest on the
Bonds to become no longer Tax-exempt) to the redemption of Bonds, to the
maximum degree permissible, and at the earliest possible date at which such
Bonds can be redeemed without payment of premium pursuant to this Indenture.
Notwithstanding Section 5.04, the moneys in the Surplus Account shall be
invested at the written direction of the Company in Permitted Investments
having a non-variable yield no higher than the yield on the Bonds (unless in
the opinion of Bond Counsel investment at a variable or higher non-variable
yield would not cause interest on the Bonds to become no longer Tax-exempt),
and all such investment income shall be deposited in the Surplus Account and
expended or reinvested as provided above.

                 In the event of redemption of all the Bonds pursuant to
Section 4.01 hereof or an Event of Default which causes acceleration of the
Bonds, any moneys then remaining in the Construction Fund shall be transferred
to the Bond Fund and used to pay the principal of the Bonds.

                 Section 3.04.  Costs of Issuance Fund.  There is hereby
created and established with the Trustee a trust fund in the name of the Issuer
to be designated "Clark County, Nevada Industrial Development Revenue Bonds
(Southwest Gas Corporation) 1993





                                          19
<PAGE>   24
Series A Costs of Issuance Fund."  The moneys in the Costs of Issuance Fund
shall be held by the Trustee in trust and applied to the payment of Costs of
Issuance.

                 Before each payment is made from the Costs of Issuance Fund by
the Trustee, there shall be filed with the Trustee a requisition of the Company
signed by an Authorized Company Representative, stating with respect to each
payment to be made:

                          (1)     the requisition number;

                          (2)     the name and address of the person to whom
                 payment is due;

                          (3)     the purpose for which such payment is to be
                 made;

                          (4)     the amount to be paid;

                          (5)     that each obligation mentioned therein has
                 been properly incurred and is a proper charge against the
                 Costs of Issuance Fund;

                          (6)     that none of the items for which payment is
                 requested has been previously reimbursed from the Costs of
                 Issuance Fund; and

                          (7)     that each item for which payment is requested
                 is or was necessary in connection with the issuance of the
                 Bonds.

                 Any money remaining in the Costs of Issuance Fund six (6)
months after the Issue Date shall be transferred to the Construction Fund.


                                   ARTICLE IV

                              REDEMPTION OF BONDS

                 Section 4.01.  Redemption of Bonds.  The Bonds are subject to
redemption to the extent the Company is entitled or required to make and makes
a prepayment pursuant to Article VII of the Agreement.  The Trustee shall not
call the Bonds for optional redemption, and the Trustee shall not give notice
of any such redemption, unless the Company has so directed in accordance with
the Agreement; provided that the Company may be required to make such payment
under Section 7.3 of the Agreement and, in the circumstances described in
Section 7.5 of the Agreement, in the event of failure of the Company to give a
notice of prepayment required by Section 7.5, such notice may be given by the
Issuer, the Trustee or any holder or holders of ten percent (10%) or more in
aggregate principal amount of Bonds Outstanding.





                                          20
<PAGE>   25
                 (a)      Extraordinary Optional Redemption.  (i) The Bonds
shall be subject to redemption in whole at any time at the option of the Issuer
at the direction of the Company at a redemption price equal to the principal
amount thereof plus accrued interest, if any, to the redemption date upon
receipt by the Trustee of a written notice from the Company stating that the
Board of Directors of the Company has determined in good faith, by a resolution
of the Board, that any of the following events has occurred within the
preceding one hundred eighty (180) days and that it therefore intends to
exercise its option to prepay the payments due under the Agreement in whole
pursuant to Section 7.2 of the Agreement and thereby effect the redemption of
Bonds in whole:

                 (A)      Changes in economic availability of raw materials,
         operating supplies or facilities necessary to operate all or a
         substantial part of the Project or technological or other changes
         which make the continued operation of the Project or such substantial
         portion uneconomical, in the opinion of the Company (expressed in a
         certificate filed with the Issuer and the Trustee), shall have
         occurred and shall have resulted in a cessation of all or
         substantially all of its normal operations of the Project.

                 (B)      Unreasonable burdens or excessive liabilities shall
         have been imposed upon the Issuer or the Company affecting all or a
         substantial part of the Project, including without limitation federal,
         state or other ad valorem, property, income or other taxes not being
         imposed on the date of the Agreement.

                 (C)      All or substantially all of the property of the
         Company shall be transferred or sold to any corporation other than an
         affiliate of the Company or the Company shall be consolidated with or
         merged into a corporation other than an affiliate of the Company in
         such manner that the Company is not the surviving corporation.

                     (ii)         The Bonds shall be subject to redemption in
whole or in part, on any date at the option of the Company, at a redemption
price equal to 103% of the principal amount thereof, plus accrued interest, if
any, to the redemption date, if the Company delivers to the Trustee, within one
hundred eighty (180) days after the Company has made the determination referred
to in clause (A), (B) or (C) below, a written notice to the effect that either

                 (A)      (I)     the Company has determined that some or all
         of the interest payable under the Agreement for any sixty (60) days
         (which need not be consecutive) within any consecutive twenty-four
         (24) month period is not or will not be deductible, in whole or in
         part, for federal income tax purposes by reason of Section 150(b) of
         the Code (or would not be deductible unless some or all of the Bonds
         are redeemed) due to a change in use of the Project or any





                                          21
<PAGE>   26
         portion thereof, and (II) the Company will not claim deductions for
such interest on its federal income tax returns; or

                 (B)      (I)     the Company has determined that there is
         "substantial authority" (within the meaning of Section
         6662(d)(2)(B)(i) of the Code) to support the position that Section
         150(b) of the Code will not prevent interest payable under the
         Agreement for any sixty (60) days (which need not be consecutive)
         within any consecutive twenty-four (24) month period from being
         deductible, in whole or in part, for federal income tax purposes, and
         (II) the Company after reasonable effort has been unable to obtain an
         opinion of independent counsel that it is more likely than not that
         Section 150 of the Code will not prevent deductions for such interest
         expense; or

                 (C)      (I)     the Company has used its best efforts to
         dissuade the Issuer from taking any action that might adversely affect
         the exclusion of interest on the Bonds from gross income for federal
         income tax purposes, and (II) the Issuer nevertheless has notified the
         Company that the Issuer proposes to take action which, in the Opinion
         of Counsel, might adversely affect the exclusion of interest on the
         Bonds from gross income for federal income tax purposes.

In the case of (A) or (B) of this subsection (ii), the Company may only direct
the Trustee to redeem such principal amount of Bonds as the Company determines
is necessary to assure that the Company retains its right to all such
deductions otherwise allowable or, if a partial redemption will not enable the
Company to retain the right to deduct such interest, the Company may direct the
Trustee to redeem all the Outstanding Bonds or any portion thereof.

                 (b)      Optional Redemption.  On and after December 1, 2003,
the Bonds shall be subject to redemption in whole or in part on any date, at
the option of the Issuer at the direction of the Company, at the redemption
prices (expressed as percentages of principal amount) set forth below, plus
accrued interest, if any, to the redemption date:

<TABLE>
<CAPTION>
           Redemption Dates                      Redemption
             (inclusive)                           Prices
             -----------                           ------
<S>                                                 <C>
December 1, 2003, through November 30, 2004         102%
December 1, 2004, through November 30, 2005         101%
December 1, 2005 and thereafter                     100%
</TABLE>

                 (c)      Mandatory Redemption.  Upon the occurrence of the
following events, the Bonds shall be redeemed at a redemption price equal to
the principal amount thereof, plus accrued interest to the redemption date:





                                          22
<PAGE>   27
                          (i)     in whole or in part upon a Determination of
         Taxability; provided, however, that all Bonds shall be redeemed upon
         such event unless, in the opinion of Bond Counsel delivered to the
         Trustee, the redemption of a specified portion of the Bonds
         Outstanding would have the result that interest payable on the Bonds
         remaining Outstanding after such redemption would be Tax-exempt to any
         holder of a Bond (other than a holder who is a "substantial user" of
         the Project or the Big Bear Lake Project or a "related person" within
         the meaning of Section 147(a) of the Code) and in such event the Bonds
         shall be redeemed (in Authorized Denominations) in such amount as Bond
         Counsel in such opinion shall have determined is necessary to
         accomplish that result upon compliance with the provisions of the
         Financing Agreement and this Indenture; or

                     (ii)         in part on any date after the Completion Date
         to the extent of amounts on deposit in the Surplus Account after the
         Completion Date.

After the receipt by the Trustee of notice from the Company of the foregoing
redemption pursuant to Section 7.5 of the Agreement, the Trustee shall give
notice of such redemption as provided in Section 4.03 hereof.  Upon the giving
of such notice, the Bonds shall become due and payable on such redemption date
at the redemption price equal to the principal amount thereof, plus accrued
interest to the redemption date.

                 For purposes of Section 4.01(c)(i), "holders" or "owners"
shall be deemed to include beneficial owners as described in Section 2.03.

                 Section 4.02.  Selection of Bonds for Redemption.  If less
than all of the Bonds are called for redemption, the Trustee shall select the
Bonds or any given portion thereof to be redeemed, from the Outstanding Bonds
or such given portion thereof not previously called for redemption, by lot or
in another manner which the Trustee deems to be fair.  The Trustee shall
promptly notify the Issuer in writing of the numbers of the Bonds or portions
thereof so selected for redemption.

                 Section 4.03.  Notice of Redemption.  Notice of redemption
shall be given by the Trustee for and on behalf of the Issuer, by Mail, not
less than thirty (30) nor more than sixty (60) days prior to the redemption
date, to (i) the Issuer, (ii) the holder of each Bond to be redeemed in whole
or in part, (iii) the Securities Depositories and (iv) two or more Information
Services.  Each notice of redemption shall state the date of such notice, the
complete name of the issue, including series designation, of the Bonds to be
redeemed, the date of issue of the Bonds to be redeemed, the redemption date,
the redemption price, the place or places of redemption (including the name and
appropriate address or addresses of the Trustee), the CUSIP number of the
Bonds, the source of the funds to be used for such redemption, the principal
amount, the distinctive





                                          23
<PAGE>   28
certificate numbers of the Bonds or portions thereof to be redeemed, the
interest rate on the Bonds to be redeemed and the maturity date of the Bonds to
be redeemed, and shall also state that the interest on the Bonds designated for
redemption shall cease to accrue from and after such redemption date and that
on said date there will become due and payable on each of said Bonds the
principal amount thereof to be redeemed, interest accrued thereon to the
redemption date and the premium, if any, thereon (such premium to be
specified), and shall require that such Bonds be then surrendered at the
address or addresses of the Trustee specified in the redemption notice.

                 If upon the expiration of thirty (30) days succeeding any
redemption date, any Bonds so called for redemption shall not have been
presented to the Trustee for payment, the Trustee shall no later that sixty
(60) days following such redemption date send Notice by Mail to the holder of
each Bond not so presented.

                 Failure by the Trustee to give notice pursuant to this Section
4.03 to any one or more of the Information Services or Securities Depositories
shall not affect the sufficiency of the proceedings for redemption.  Failure by
the Trustee to mail notice of redemption pursuant to this Section 4.03 to any
one or more of the respective holders of any Bonds designated for redemption,
or any defect therein, shall not affect the sufficiency of the proceedings for
redemption with respect to any other Bond.

                 Section 4.04.  Partial Redemption of Registered Bonds.  Upon
surrender of any Bond redeemed in part only, the Trustee shall provide a
replacement Bond of like tenor in a principal amount equal to the portion of
such Bond not redeemed, and deliver it to the registered owner thereof.  The
Bond so surrendered shall be cancelled by the Trustee as provided herein.  The
Issuer and the Trustee shall be fully released and discharged from all
liability to the extent of payment of the redemption price for such partial
redemption.

                 Section 4.05.  Effect of Redemption.  Notice of redemption
having been duly given as aforesaid, and moneys for payment of the redemption
price being held by the Trustee, the Bonds so called for redemption shall, on
the redemption date designated in such notice, become due and payable at the
redemption price specified in such notice, interest on the Bonds so called for
redemption shall cease to accrue, said Bonds shall cease to be entitled to any
lien, benefit or security under this Indenture, and the holders of said Bonds
shall have no rights in respect thereof except to receive payment of the
redemption price thereof.

                 All Bonds fully redeemed pursuant to the provisions of this
Article IV shall be cancelled upon surrender thereof and may be destroyed by
the Trustee, which shall, if requested in writing, thereupon deliver to the
Issuer a certificate evidencing such destruction.





                                          24
<PAGE>   29

                                   ARTICLE V

                                    REVENUES

                 Section 5.01.  Pledge and Assignment of Revenues.  All of the
Revenues are hereby irrevocably pledged and assigned to the Trustee for the
punctual payment of the principal of, interest and premium, if any, on the
Bonds, and such Revenues shall not be used for any other purpose while any
Bonds remain Outstanding.  Said pledge and assignment shall constitute a first
and exclusive lien on such Revenues for the payment of the Bonds in accordance
with the terms thereof.  The Trustee hereby accepts such assignment.

                 All Revenues shall be held in trust for the benefit of the
holders from time to time of the Bonds issued hereunder, but shall nevertheless
be disbursed, allocated and applied solely for the uses and purposes
hereinafter in this Article V set forth.

                 Section 5.02.  Bonds Not General Obligations.  The Bonds shall
never constitute the debt or indebtedness of the Issuer or the State of Nevada
(or any other political subdivision thereof) within the meaning of any
provision or limitation of the constitution or statutes of the State of Nevada,
and shall not constitute nor give rise to a pecuniary liability of, or a charge
against the general credit or taxing powers of the Issuer or the State of
Nevada (or any other political subdivision thereof).  The Bonds and the
premium, if any, and the interest thereon shall be special, limited obligations
of the Issuer payable solely from the Revenues of the Issuer derived from the
Agreement and the other moneys pledged therefor under this Indenture.

                 Section 5.03.  Bond Fund.  (a) There is hereby created and
established with the Trustee a trust fund in the name of the Issuer to be
designated "Clark County, Nevada Industrial Development Revenue Bonds
(Southwest Gas Corporation) 1993 Series A Bond Fund."  The Bond Fund, and all
moneys and certificated securities therein, shall be kept in the possession of
the Trustee.

                 (b)      Upon the receipt thereof, the Trustee shall deposit
all accrued interest paid upon the delivery of the Bonds and all Revenues
(except as otherwise provided herein) in the Bond Fund, which the Trustee shall
maintain and hold in trust, and which shall be disbursed and applied only as
hereinafter authorized.  Moneys in the Bond Fund shall be used solely for the
payment of the principal of, premium, if any, and interest on the Bonds as the
same shall become due and payable at maturity, upon redemption or otherwise;
provided, however, that on the fifth day after each Interest Payment Date, any
moneys remaining in the Bond Fund (except moneys held in the Surplus Account)
on such date and not required to pay interest on or principal of the Bonds then
due and payable shall be returned to the Company.





                                          25
<PAGE>   30
                 Section 5.04.  Trustee Authorized to Take Actions Under the
Agreement.  The Issuer hereby authorizes and directs the Trustee, and the
Trustee hereby agrees, to take such actions as the Trustee, in its sole and
absolute discretion, deems necessary to enforce the Company's obligation under
the Financing Agreement to make payments at the times and in the amounts
required thereunder to make timely payment of principal of and interest on the
Bonds to the extent Bond proceeds and other moneys in the Bond Fund are not
available for such payment in accordance with the provision of Section 5.03 of
this Indenture.

                 Section 5.05.  Investment of Moneys.  Subject to the
limitations in Sections 3.03 and 5.08 hereof, any moneys in any of the funds
and accounts to be established by the Trustee pursuant to this Indenture, shall
be invested by the Trustee upon the written direction of the Company, if and to
the extent then permitted by law, in Investment Securities.  In the absence of
such direction, the Trustee shall invest solely in units of a money market
portfolio restricted to obligations issued by, or guaranteed by the full faith
and credit of, the United States of America, or repurchase agreements
collateralized by such obligations.  Moneys in any fund or account shall be
invested in Investment Securities with respect to which payments of principal
and interest are scheduled or otherwise payable not later than the date on
which it is estimated that such moneys will be required by the Trustee.

                 Any interest, profit or loss on such investments shall be
credited or charged to the respective funds from which such investments are
made.  The Trustee may sell or present for redemption any obligations so
purchased whenever it shall be necessary in order to provide moneys to meet any
payment, and the Trustee shall not be liable or responsible for any loss
resulting from such sale or redemption of such investment.

                 Section 5.06.  Assignment to Trustee; Enforcement of
Obligations.  The Issuer hereby transfers, assigns and sets over to the Trustee
any and all rights and privileges it has under the Agreement with respect to
the Bonds issued hereunder, except the Issuer's right to receive payments under
Sections 4.2(c), 6.3, 8.2 and 8.3 of the Agreement and the Issuer's right to
consent to amendments of the Project under Section 3.1 of the Agreement, but
including, without limitation, the right to collect and receive directly all of
the Revenues and the right to hold and enforce any security interest; and any
Revenues collected or received by the Issuer shall be deemed to be held, and to
have been collected or received, by the Issuer as the agent of the Trustee, and
shall forthwith be paid by the Issuer to the Trustee.  The Trustee also shall
be entitled to and shall take all steps, actions and proceedings reasonably
necessary in its judgment (1) to enforce the terms, covenants and conditions
of, and preserve and protect the priority of its interest in and under, the
Agreement, and (2) to assure compliance with all covenants, agreements and
conditions on the part of the Issuer contained in this Indenture with respect
to the Revenues.





                                          26
<PAGE>   31
                 Section 5.07.  Repayment to Company.  When there are no longer
any Bonds Outstanding and all fees, charges and expenses of the Trustee and any
paying agents have been paid or provided for, and all expenses of the Issuer
relating to the Project and this Indenture have been paid or provided for, and
all other amounts payable hereunder, including without limitation the Rebate
Amount, and under the Agreement have been paid, and this Indenture has been
discharged and satisfied, the Trustee shall pay to the Company any amounts
remaining in any fund established and held hereunder.

                 Section 5.08.  Rebate Fund.  The Trustee shall establish and
maintain a fund separate from any other fund established and maintained
hereunder designated as the "Clark County, Nevada Industrial Development
Revenue Bonds (Southwest Gas Corporation) 1993 Series A Rebate Fund."  Within
the Rebate Fund, the Trustee shall maintain such accounts as it is instructed
by the Company as shall be necessary in order to comply with the terms and
requirements of the Tax Certificate.  All money at any time deposited in the
Rebate Fund shall be held by the Trustee in trust, to the extent required to
satisfy the Rebate Amount (as defined in the Tax Certificate), for payment to
the federal government of the United States of America, and none of the Issuer,
the Trustee, the Company nor the holder of any Bonds shall have any rights in
or claim to such money.  All amounts deposited into or on deposit in the Rebate
Fund shall be governed by this Section 5.08 and by the Tax Certificate (which
is incorporated herein by reference).

                 The Trustee shall be deemed conclusively to have complied with
such provisions if it follows the directions of the Company, including
supplying all necessary information in the manner provided in the Tax
Certificate, shall not be required to take any actions thereunder in the
absence of written directions by the Company, and shall have no liability or
responsibility to enforce compliance by the Company or the Issuer with the
terms of the Tax Certificate.

                 Notwithstanding any other provision of this Indenture,
including in particular Article X hereof, the obligation to remit the Rebate
Amounts to the United States and to comply with all other requirements of this
Section 5.08 and the Tax Certificate shall survive the defeasance or payment in
full of the Bonds.


                                   ARTICLE VI

                            COVENANTS OF THE ISSUER

                 Section 6.01.  Payment of Principal and Interest.  The Issuer
shall punctually pay, but only out of Revenues as herein provided, the
principal and the interest (and premium, if any) to become due in respect of
every Bond issued hereunder at the times and places and in the manner provided
herein and in the Bonds according to the true intent and meaning thereof.  When
and as





                                          27
<PAGE>   32
paid in full, all Bonds, if any, shall be delivered to the Trustee, shall
forthwith be cancelled and shall, at the instruction of the Company, thereafter
be destroyed.

                 Section 6.02.  Extension or Funding of Claims for Interest.
The Issuer shall not, directly or indirectly, extend or assent to the extension
of the time for the payment of any claim for interest on any of the Bonds, and
shall not, directly or indirectly, be a party to or approve any such
arrangement by purchasing or funding such claims or in any other manner.  In
case any such claim for interest shall be extended or funded, whether or not
with the consent of the Issuer, such claim for interest so extended or funded
shall not be entitled, in case of default hereunder, to the benefits of this
Indenture, except subject to the prior payment in full of the principal of all
of the Bonds then Outstanding and of all claims for interest which shall not
have been so extended or funded.

                 Section 6.03.  Paying Agents.  The Issuer, with the written
approval of the Trustee and the Company, may appoint and at all times have one
or more paying agents (which shall meet the qualification of the Trustee set
forth in Section 8.07 hereof) in such place or places as the Issuer may
designate, for the payment of the principal of, and the interest (and premium,
if any) on, the Bonds.  All provisions of Article VIII which apply to the
Trustee shall apply to any paying agent appointed hereunder.  It shall be the
duty of the Trustee to make such arrangements with any such paying agent as may
be necessary to assure, to the extent of the moneys held by the Trustee for
such payment, the prompt payment of the principal of and interest and premium,
if any, on the Bonds presented at either place of payment.  The paying agent
initially appointed hereunder is the Trustee.

                 Section 6.04.  Preservation of Revenues.  The Issuer shall not
waive any provision of the Agreement or take any action to interfere with or
impair the pledge and assignment hereunder of Revenues, the assignment to the
Trustee of rights under the Agreement or the Trustee's enforcement of any
rights thereunder, without the prior written consent of the Trustee.  The
Trustee may give such written consent, and may itself take any such action or
consent to an amendment or modification to the Agreement or to any other
document, instrument or agreement relating to the security for the Bonds only
in accordance with the provisions of Article IX hereof.

                 Section 6.05.  Compliance with Indenture.  The Issuer shall
not issue, or permit to be issued, any Bonds secured or payable in any manner
out of Revenues in any manner other than in accordance with the provisions of
this Indenture, and shall not suffer or permit any default to occur under this
Indenture, but shall faithfully observe and perform all the covenants,
conditions and requirements hereof.

                 Section 6.06.  Other Liens.  So long as any Bonds are
Outstanding, the Issuer shall not create or suffer to be created





                                          28
<PAGE>   33
any pledge, lien or charge of any type whatsoever upon all or any part of the
Trust Estate, other than the lien of this Indenture.

                 Section 6.07.  Further Assurances.  Whenever and so often as
requested so to do by the Trustee, the Issuer shall promptly execute and
deliver or cause to be executed and delivered all such other and further
instruments, documents or assurances, and promptly do or cause to be done all
such other and further things, as may be necessary or reasonably required in
order to further and more fully vest in the Trustee and the Bondholders all of
the rights, interests, powers, benefits, privileges and advantages conferred or
intended to be conferred upon them by this Indenture and to perfect and
maintain as perfected such rights, interests, powers, benefits, privileges and
advantages.


                                  ARTICLE VII

                                    DEFAULT

                 Section 7.01.  Events of Default; Acceleration; Waiver of
Default.  Each of the following events shall constitute an "Event of Default"
hereunder:

                 (a)      Failure to make payment of any installment of
interest upon any Bond for a period of five (5) Business Days after such
payment has become due and payable;

                 (b)      Failure to make due and punctual payment of the
principal of and premium, if any, on any Bond when the same shall have become
due and payable, whether at the stated maturity thereof, or upon proceedings
for redemption thereof or upon the maturity thereof by declaration;

                 (c)      The occurrence of an "event of default" under the
Agreement, as specified in Section 6.1 thereof; or

                 (d)      Default by the Issuer in the performance or
observance of any other of the covenants, agreements or conditions on its part
in this Indenture or in the Bonds contained, and the continuance of such
default for a period of ninety (90) days after written notice thereof,
specifying such default and requiring the same to be remedied, shall have been
given to the Issuer and the Company by the Trustee, or to the Issuer, the
Company and the Trustee by the holders of not less than twenty-five percent
(25%) in aggregate principal amount of the Bonds at the time Outstanding.

                 No default specified in (d) above shall constitute an Event of
Default unless the Issuer and the Company shall have failed to correct such
default within the applicable period; provided, however, that if the default
shall be such that it can be corrected, but cannot be corrected within such
period, it shall not constitute an Event of Default if corrective action is





                                          29
<PAGE>   34
instituted by the Issuer or the Company within the applicable period and
diligently pursued until the default is corrected.  With regard to any alleged
default concerning which notice is given to the Company under the provisions of
this Section, the Issuer hereby grants the Company full authority for account
of the Issuer to perform any covenant or obligation the non-performance of
which is alleged in said notice to constitute a default in the name and stead
of the Issuer with full power to do any and all things and acts to the same
extent that the Issuer could do and perform any such things and acts and with
power of substitution.

                 Upon the occurrence and continuation of an Event of Default,
the Trustee may, and upon the written request of the holders of not less than
25% in aggregate principal amount of Bonds then Outstanding shall, by notice in
writing delivered to the Company and the Issuer, declare the principal of all
Bonds then Outstanding and the interest accrued thereon immediately due and
payable, and such principal and interest shall thereupon become and be
immediately due and payable.  Notwithstanding the foregoing, the Trustee shall
not be required to take any action upon the occurrence and continuation of an
Event of Default under clause (c) or (d) of the first paragraph of this Section
7.01 until a Responsible Officer of the Trustee has actual knowledge of such
Event of Default.  Upon any such declaration of acceleration, interest shall
cease to accrue and the Trustee shall declare all indebtedness payable under
Section 4.2(a) of the Agreement to be immediately due and payable in accordance
with Section 6.2 of the Agreement and may exercise and enforce such rights as
exist under the Agreement.

                 The preceding paragraph, however, is subject to the condition
that if, at any time after the principal of the Bonds shall have been so
declared due and payable, and before any judgment or decree for the payment of
the moneys due shall have been obtained or entered as hereinafter provided,
there shall have been deposited with the Trustee a sum sufficient to pay all
the principal of the Bonds matured prior to such declaration and all matured
installments of interest (if any) upon all the Bonds, with interest on such
overdue installments of principal as provided in the Agreement, and the
reasonable expenses of the Trustee, and any and all other defaults known to the
Trustee (other than in the payment of principal of and interest on the Bonds
due and payable solely by reason of such declaration) shall have been made good
or cured to the satisfaction of the Trustee or provision deemed by the Trustee
to be adequate shall have been made therefor, then, and in every such case, the
holders of a majority in aggregate principal amount of the Bonds then
Outstanding, by written notice to the Issuer and to the Trustee, may, on behalf
of the holders of all the Bonds, rescind and annul such declaration and its
consequences and waive such default; provided that no such rescission and
annulment shall extend to or shall affect any subsequent default, or shall
impair or exhaust any right or power consequent thereon.





                                          30
<PAGE>   35
                 Section 7.02.  Institution of Legal Proceedings by Trustee.
If one or more of the Events of Default specified in Section 7.01 shall happen
and be continuing, the Trustee in its discretion may, and upon the written
request of the holders of not less than twenty-five percent (25%) in principal
amount of the Bonds then Outstanding and upon being indemnified to its
satisfaction therefor shall, proceed to protect or enforce its rights or the
rights of the holders of Bonds under the Act or under this Indenture, by a suit
in equity or action at law, either for the specific performance of any covenant
or agreement contained herein, or in aid of the execution of any power herein
granted, or by mandamus or other appropriate proceeding for the enforcement of
any other legal or equitable remedy as the Trustee shall deem most effectual in
support of any of its rights or duties hereunder.

                 Section 7.03.  Application of Moneys Collected by Trustee.
Any moneys collected by the Trustee pursuant to Section 7.02 shall be applied
in the order following, at the date or dates fixed by the Trustee and, in the
case of distribution of such moneys on account of principal (or premium, if
any) or interest, upon presentation of the Bonds, and stamping thereon the
payment, if only partially paid, and upon surrender thereof, if fully paid:

         First:  To the payment of costs and expenses of collection, just and
         reasonable compensation to the Trustee for its own services and for
         the services of counsel, agents and employees by it properly engaged
         and employed, and all other expenses and liabilities incurred, and for
         advances made pursuant to the provisions of this Indenture.

         Second:  In case the principal of none of the Bonds shall have become
         due and remains unpaid, to the payment of interest in default, such
         payments to be made ratably and proportionately to the persons
         entitled thereto without discrimination or preference, except as
         specified in Section 6.02.

         Third:  In case the principal of any of the Bonds shall have become
         due by declaration or otherwise and remains unpaid, first to the
         payment of principal of all Bonds then due and unpaid, then to the
         payment of interest in default, then to the payment of the premium
         thereon, if any, and then to the payment of interest on the overdue
         principal and interest at the rate then borne by the Bonds; in every
         instance such payment to be made ratably to the persons entitled
         thereto without discrimination or preference, except as specified in
         Section 6.02.

If such moneys are invested, they shall be invested only in Permitted
Investments having a maturity of thirty (30) days or less.





                                          31
<PAGE>   36
                 Section 7.04.  Effect of Delay or Omission to Pursue Remedy.
No delay or omission of the Trustee or of any holder of Bonds to exercise any
right or power arising from any default shall impair any such right or power or
shall be construed to be a waiver of any such default or acquiescence therein,
and every power and remedy given by this Article VII to the Trustee or to the
holders of Bonds may be exercised from time to time and as often as shall be
deemed expedient.  In case the Trustee shall have proceeded to enforce any
right under this Indenture, and such proceedings shall have been discontinued
or abandoned because of waiver or for any other reason, or shall have been
determined adversely to the Trustee, then and in every such case the Issuer,
the Trustee and the holders of the Bonds, severally and respectively, shall be
restored to their former positions and rights hereunder with respect to the
Trust Estate; and all remedies, rights and powers of the Issuer, the Trustee
and the holders of the Bonds shall continue as though no such proceedings had
been taken.

                 Section 7.05.  Remedies Cumulative.  No remedy herein
conferred upon or reserved to the Trustee or to any holder of the Bonds is
intended to be exclusive of any other remedy, but each and every such remedy
shall be cumulative and shall be in addition to every other remedy given
hereunder or now or hereafter existing at law or in equity.

                 Section 7.06.  Covenant to Pay Bonds in Event of Default.  The
Issuer covenants that, upon the happening of any Event of Default, the Issuer
will pay to the Trustee upon demand, but only out of Revenues, for the benefit
of the holders of the Bonds, respectively, the whole amount then due and
payable thereon (by declaration or otherwise) for interest or for principal and
premium, or both, as the case may be, and all other sums which may be due
hereunder or secured hereby, including reasonable compensation to the Trustee,
its agents and counsel, and any expenses or liabilities incurred by the Trustee
hereunder.  In case the Issuer shall fail to pay the same forthwith upon such
demand, the Trustee, in its own name and as trustee of an express trust, shall
be entitled to institute proceedings at law or in equity in any court of
competent jurisdiction to recover judgment for the whole amount due and unpaid,
together with costs and reasonable attorneys' fees, subject, however, to the
condition that such judgment, if any, shall be limited to, and payable solely
out of, Revenues as herein provided and not otherwise.  The Trustee shall be
entitled to recover such judgment as aforesaid, either before or after or
during the pendency of any proceedings for the enforcement of this Indenture,
and the right of the Trustee to recover such judgment shall not be affected by
the exercise of any other right, power or remedy for the enforcement of the
provisions of this Indenture.

                 Section 7.07.  Trustee Appointed Agent for Bondholders.  The
Trustee is hereby appointed the agent and attorney of the





                                          32
<PAGE>   37
holders of all Bonds Outstanding hereunder for the purpose of filing any claims
relating to the Bonds.

                 Section 7.08.  Power of Trustee to Control Proceedings.  In
the event that the Trustee, upon the happening of an Event of Default, shall
have taken any action, by judicial proceedings or otherwise, pursuant to its
duties hereunder, whether upon its own discretion or upon the request of the
holders of not less than twenty-five percent (25%) in principal amount of the
Bonds then Outstanding, it shall have full power, in the exercise of its
discretion for the best interests of the holders of the Bonds, with respect to
the continuance, discontinuance, withdrawal, compromise, settlement or other
disposal of such action; provided, however, that the Trustee shall not, unless
there no longer continues an Event of Default hereunder, discontinue, withdraw,
compromise or settle, or otherwise dispose of any litigation pending at law or
in equity, if at the time there has been filed with it a written request signed
by the holders of a majority in principal amount of the Bonds Outstanding
hereunder opposing such discontinuance, withdrawal, compromise, settlement or
other disposal of such litigation.

                 Section 7.09.  Limitation on Bondholders' Right to Sue.  No
holder of any Bond issued hereunder shall have the right to institute any suit,
action or proceeding at law or in equity, for any remedy under or upon this
Indenture, unless (a) such holder shall have previously given to the Trustee
written notice of the occurrence of an Event of Default hereunder; (b) the
holders of not less than twenty-five percent (25%) in aggregate principal
amount of all the Bonds then Outstanding shall have made written request upon
the Trustee to exercise the powers hereinbefore granted or to institute such
action, suit or proceeding in its own name; (c) said holders shall have
tendered to the Trustee reasonable indemnity against the costs, expenses and
liabilities to be incurred in compliance with such request; and (d) the Trustee
shall have refused or omitted to comply with such request for a period of
thirty (30) days after such written request shall have been received by, and
said tender of indemnity shall have been made to, the Trustee.

                 Such notification, request, tender of indemnity and refusal or
omission are hereby declared, in every case, to be conditions precedent to the
exercise by any holder of Bonds of any remedy hereunder; it being understood
and intended that no one or more holders of Bonds shall have any right in any
manner whatever by his or her or their action to enforce any right under this
Indenture, except in the manner herein provided, and that all proceedings at
law or in equity to enforce any provision of this Indenture shall be
instituted, had and maintained in the manner herein provided and for the equal
benefit of all holders of the Outstanding Bonds (subject to the provisions of
Section 6.02).

                 The right of any holder of any Bond to receive payment of the
principal of (and premium, if any) and interest on such





                                          33
<PAGE>   38
Bond out of Revenues, as herein and therein provided, on and after the
respective due dates expressed in such Bond, or to institute suit for the
enforcement of any such payment on or after such respective dates, shall not be
impaired or affected without the consent of such holder, notwithstanding the
foregoing provisions of this Section or Section 7.08 or any other provision of
this Indenture.

                 Section 7.10.  Limitation of Liability to Revenues.
Notwithstanding anything in this Indenture contained, the Issuer shall not be
required to advance any moneys derived from the proceeds of taxes collected by
the Issuer or by any governmental body or political subdivision of the State of
Nevada or from any source of income of any governmental body or political
subdivision of the State of Nevada or the Issuer other than the Revenues, for
any of the purposes in this Indenture mentioned, whether for the payment of the
principal of or interest on the Bonds or for any other purpose of this
Indenture.  The Bonds are not general obligations of the Issuer, and are
payable from and secured by the Revenues only.


                                  ARTICLE VIII

                                  THE TRUSTEE

                 Section 8.01.  Duties, Immunities and Liabilities of Trustee.
The Trustee shall, prior to an Event of Default, and after the curing of all
Events of Default which may have occurred, perform such duties and only such
duties as are specifically set forth in this Indenture.  The Trustee shall,
during the existence of any Event of Default (which has not been cured),
exercise such of the rights and powers vested in it by this Indenture, and use
the same degree of care and skill in their exercise, as prudent persons would
exercise or use under the circumstances in the conduct of their own affairs.
Notwithstanding any other provision of this Indenture, the Trustee shall
perform all duties required of it hereunder.

                 No provision of this Indenture shall be construed to relieve
the Trustee from liability for its own negligent action or its own negligent
failure to act, except that:

                 (a)      Prior to such an Event of Default hereunder and after
the curing of all Events of Default which may have occurred,

                          (1)     the duties and obligations of the Trustee
                 shall be determined solely by the express provisions of this
                 Indenture.  The Trustee shall not be liable except for the
                 performance of such duties and obligations as are specifically
                 set forth in this Indenture, and no implied covenants or
                 obligations shall be read into this Indenture against the
                 Trustee; and





                                          34
<PAGE>   39
                          (2)     in the absence of bad faith on the part of
                 the Trustee, the Trustee may conclusively rely, as to the
                 truth of the statements and the correctness of the opinions
                 expressed therein, upon any certificate or opinion furnished
                 to the Trustee conforming to the requirements of this
                 Indenture; but in the case of any such certificate or opinion
                 which by any provision hereof is specifically required to be
                 furnished to the Trustee, the Trustee shall be under a duty to
                 examine the same to determine whether or not it conforms to
                 the requirements of this Indenture;

                 (b)      At all times, regardless of whether or not any Event
         of Default shall exist,

                          (1)     the Trustee shall not be liable for any error
                 of judgment made in good faith by a Responsible Officer or
                 officers of the Trustee unless it shall be proved that the
                 Trustee was negligent in ascertaining the pertinent facts; and

                          (2)     the Trustee shall not be personally liable
                 for any action taken, permitted or omitted by it in good faith
                 and reasonably believed by it to be authorized or within the
                 discretion or rights or power conferred upon it by this
                 Indenture unless it shall be proved that the Trustee was
                 negligent.

                 (c)      The Trustee may execute any of the trusts or powers
         hereof and perform the duties required of it hereunder by or through
         attorneys, agents or receivers, and shall be entitled to advice of
         counsel concerning all matters of trust and concerning its duties
         hereunder.

                 (d)  The Trustee shall not be bound to make any investigation
         into the facts of matters stated in any resolution, certificate,
         statement, instrument, opinion, report, notice, request, consent,
         order, approval, bond, or other paper or document, unless requested in
         writing to do so by the Company, any holder of Bonds or the Issuer;
         provided, however, that if the payment within a reasonable time to the
         Trustee of the costs, expenses or liabilities likely to be incurred by
         it in connection with making such investigation shall be, in the sole
         opinion of the Trustee, not reasonably assured to the Trustee by the
         security afforded to it by the terms of this Indenture, the Trustee
         may require reasonable indemnity against such cost, expense or
         liability as a condition to proceeding with such investigation.  The
         reasonable expense of every such investigation shall be paid by the
         Company.

                 (e)      Notwithstanding any other provision of this Indenture
         or the Agreement, the Trustee shall not be charged with knowledge of
         any Event of Default under clause (c) or (d) of Section 7.01 of this
         Indenture or any failure by the





                                          35
<PAGE>   40
         Company to comply with the obligations of the Company set forth in the
         Agreement unless a Responsible Officer of the Trustee obtains actual
         knowledge of such Event of Default or failure to comply, as the case
         may be, which may be in the form of written notice delivered to the
         Trustee pursuant to Section 11.07.

                 None of the provisions contained in this Indenture shall
require the Trustee to expend or risk its own funds or otherwise incur
individual financial liability in the performance of any of its duties or in
the exercise of any of its rights or powers.

                 Section 8.02.  Right of Trustee to Rely upon Documents, Etc.

                 (a)      The Trustee may conclusively rely and shall be
         protected in acting upon any resolution, certificate, statement,
         instrument, opinion, report, notice, request, consent, order, Bond,
         direction, demand or election or other paper or document believed by
         it to be genuine and to have been signed or presented by the proper
         party or parties;

                 (b)      Any notice, request, direction, election, order or
         demand of the Issuer mentioned herein shall be sufficiently evidenced
         by an instrument signed in the name of the Issuer by the Chairman of
         the Board of County Commissioners of the Issuer, and any resolution of
         the Issuer may be evidenced to the Trustee by a Certified Resolution;

                 (c)      The Trustee may consult with counsel (who may be
         counsel for the Issuer or Bond Counsel) and the opinion or advice of
         such counsel shall be full and complete authorization and protection
         in respect of any action taken or suffered by it hereunder in good
         faith and in accordance with the opinion or advice of such counsel;

                 (d)      Whenever in the administration of the trusts of this
         Indenture the Trustee shall deem it necessary or desirable that a
         matter be proved or established prior to taking or suffering any
         action hereunder, such matter (unless other evidence in respect
         thereof be herein specifically prescribed) may, in the absence of
         negligence or bad faith on the part of the Trustee, as the case may
         be, be deemed to be conclusively proved and established by a
         Certificate of the Issuer; and such Certificate of the Issuer shall,
         in the absence of negligence or bad faith on the part of the Trustee,
         be full warrant to the Trustee for any action taken or suffered by it
         under the provisions of this Indenture upon the faith thereof; and

                 (e)      The Trustee may execute any of the trusts or powers
         hereunder or perform any duties hereunder either directly or by or
         through agents or attorneys and the Trustee shall not be responsible
         for any misconduct or





                                          36
<PAGE>   41
         negligence on the part of any agent or attorney appointed with due
         care by it hereunder.

                 Section 8.03.  Trustee Not Responsible for Recitals.  The
recitals contained herein and in the Bonds shall be taken as the statements of
the Issuer, and the Trustee assumes no responsibility for the correctness of
the same except for the Certificate of Authentication on the Bonds.  The
Trustee makes no representations as to the validity or sufficiency of this
Indenture or of the Bonds.  The Trustee shall not be accountable for the use or
application by the Issuer or the Company of any of the Bonds authenticated or
delivered hereunder or of the proceeds of such Bonds.

                 Section 8.04.  Right of Trustee to Acquire Bonds.  The Trustee
and its officers and directors may acquire and hold, or become the pledgee of,
Bonds and otherwise deal with the Issuer in the manner and to the same extent
and with like effect as though it were not Trustee hereunder.

                 Section 8.05.  Moneys Received by Trustee to Be Held in Trust.
Subject to the provisions of Section 10.03, all moneys received by the Trustee
shall, until used or applied as herein provided, be held in trust for the
purposes for which they were received, but need not be segregated from other
funds except to the extent required by law.  Any interest allowed on any such
moneys shall be deposited in the fund to which such moneys are credited.  Any
moneys held by the Trustee may be deposited by it in its banking department and
invested as provided herein.

                 Section 8.06.  Compensation and Indemnification of Trustee.
The Trustee shall be entitled to reasonable compensation for all services
rendered by it in the execution of the trusts created and in the exercise and
performance of any of the powers and duties hereunder of the Trustee which
compensation shall not be limited by any provision of law in regard to the
compensation of a trustee of an express trust, and the Financing Agreement will
require the Company to pay or reimburse the Trustee upon its request for all
expenses, disbursements and advances incurred or made by the Trustee in
accordance with any of the provisions of this Indenture (including the
reasonable compensation and the expenses and disbursements of its counsel and
of all persons not regularly in its employ) except any such expense,
disbursement or advance as may arise from its negligence or bad faith.  If any
property, other than cash, shall at any time be held by the Trustee subject to
this Indenture, or any Supplemental Indenture, as security for the Bonds, the
Trustee, if and to the extent authorized by a receivership, bankruptcy or other
court of competent jurisdiction or by the instrument subjecting such property
to the provisions of this Indenture as such security for the Bonds, shall be
entitled to make advances for the purpose of preserving such property or of
discharging tax liens or other prior liens or encumbrances thereon.  The
Financing Agreement will also require the Company to indemnify the Trustee and
its officers, directors, employees and agents





                                          37
<PAGE>   42
for, and to hold them harmless against, any loss, liability, expense or advance
incurred or made without negligence or bad faith on the part of the Trustee
arising out of or in connection with the acceptance or administration of this
trust, including the costs and expenses of defending itself against any claim
of liability in the premises.  Notwithstanding the foregoing, the Trustee shall
make timely payments of principal of and interest on the Bonds with moneys on
deposit in the Bond Fund as provided herein, and shall accelerate the payment
of principal on the Bonds when required by this Indenture.  Subject to Section
7.03 hereof, the rights of the Trustee to compensation for its services and to
payment or reimbursement for expenses, disbursements, liabilities and advances
shall have priority over the Bonds in respect of all property and funds held or
collected by the Trustee as such, and other funds held in trust by the Trustee
for the benefit of the holders of particular Bonds.

                 Section 8.07.  Qualifications of Trustee.  There shall at all
times be a trustee hereunder which shall be a bank, trust company or national
association organized and doing business under the laws of the United States or
of a state thereof, authorized under such laws to exercise corporate trust
powers, having a combined capital and surplus of at least Fifty Million Dollars
($50,000,000), and subject to supervision or examination by federal or state
authority.  If such corporations or banking associations publish reports of
condition at least annually, pursuant to law or to the requirements of any
supervising or examining authority above referred to, then for the purposes of
this Section the combined capital and surplus of such corporations or banking
associations shall be deemed to be their combined capital and surplus as set
forth in their most recent reports of conditions so published.  In case at any
time the Trustee shall cease to be eligible in accordance with the provisions
of this Section, the Trustee shall resign immediately in the manner and with
the effect specified in Section 8.08.

                 Section 8.08.  Resignation and Removal of Trustee and
Appointment of Successor Trustee.  (a) The Trustee may at any time resign by
giving written notice to the Issuer and by giving to the Bondholders Notice by
Mail.  Upon receiving such notice of resignation, the Issuer, with the advice
and consent of the Company, shall promptly appoint a successor trustee by an
instrument in writing.  If no successor trustee shall have been so appointed
and have accepted appointment within thirty days after the Trustee's giving of
such notice of resignation, the resigning trustee may petition any court of
competent jurisdiction for the appointment of a successor trustee or any
Bondholder who has been a bona fide holder of a Bond for at least six months
may, on behalf of himself and others similarly situated, petition any such
court for the appointment of a successor trustee.  Such court may thereupon,
after such notice, if any, as it may deem proper and may prescribe, appoint a
successor.





                                          38
<PAGE>   43
                 (b)      In case at any time either of the following shall
occur:

                          (1)     the Trustee shall cease to be eligible in
                 accordance with the provisions of Section 8.07 and shall fail
                 to resign after written request therefor by the Issuer or by
                 any Bondholder who has been a bona fide holder of a Bond for
                 at least six months, or

                          (2)     the Trustee shall become incapable of acting,
                 or shall be adjudged a bankrupt or insolvent, or a receiver of
                 the Trustee or of its property shall be appointed, or any
                 public officer shall take charge or control of the Trustee or
                 of its property or affairs for the purpose of rehabilitation,
                 conservation or liquidation,

then, in any such case, the Issuer shall remove the Trustee and, with the
advice and consent of the Company, appoint a successor trustee by an instrument
in writing; and if the Issuer fails to remove the Trustee and appoint a
successor within sixty (60) days after an event described in clauses (1) or (2)
above, any Bondholder may, on behalf of itself and all others similarly
situated, petition any court of competent jurisdiction for the removal of the
Trustee and the appointment of a successor trustee.  Such court may thereupon,
after such notice, if any, as it may deem proper and may prescribe, remove the
Trustee and appoint a successor trustee.

                 (c)      The Issuer, in the absence of an Event of Default,
with the advice and consent of the Company, or the holders of a majority in
aggregate principal amount of the Bonds at the time Outstanding may at any time
remove the Trustee and appoint a successor trustee by an instrument or
concurrent instruments in writing signed by the Issuer or such Bondholders, as
the case may be.

                 (d)      Any resignation or removal of the Trustee and
appointment of a successor trustee pursuant to any of the provisions of this
Section shall become effective upon acceptance of appointment by the successor
trustee as provided in Section 8.09.

                 Section 8.09.  Acceptance of Trust by Successor Trustee.  Any
successor trustee appointed as provided in Section 8.08 shall execute,
acknowledge and deliver to the Issuer and to its predecessor trustee an
instrument accepting such appointment hereunder, and thereupon the resignation
or removal of the predecessor trustee shall become effective and such successor
trustee, without any further act, deed or conveyance, shall become vested with
all the rights, powers, trusts, duties and obligations of its predecessor in
the trusts hereunder, with like effect as if originally named as Trustee
herein; but, nevertheless, on the Written Request of the Issuer or the request
of the successor trustee, the trustee ceasing to act shall





                                          39
<PAGE>   44
execute and deliver an instrument transferring to such successor trustee, upon
the trusts herein expressed, all the rights, powers and trusts of the trustee
so ceasing to act.  Upon request of any such successor trustee, the Issuer
shall execute any and all instruments in writing necessary or desirable for
more fully and certainly vesting in and confirming to such successor trustee
all such rights, powers and duties.  Any trustee ceasing to act shall,
nevertheless, retain a lien upon all property or funds held or collected by
such trustee to secure the amounts due it as compensation, reimbursement,
expenses and indemnity afforded to it by Section 8.06.

                 No successor trustee shall accept appointment as provided in
this Section 8.09 unless at the time of such acceptance such successor trustee
shall be eligible under the provisions of Section 8.07.

                 Upon acceptance of appointment by a successor trustee as
provided in this Section, the Issuer or such successor trustee shall give
Bondholders notice of the succession of such trustee to the trusts hereunder in
the manner prescribed in Section 8.08 for the giving of notice of resignation
of the Trustee.

                 Section 8.10.  Merger or Consolidation of Trustee.  Any
corporation or banking association into which the Trustee may be merged or with
which it may be consolidated, or any corporation or banking association
resulting from any merger or consolidation to which the Trustee shall be a
party, or any corporation or banking association succeeding to the business of
the Trustee, shall be the successor of the Trustee hereunder without the
execution or filing of any paper or any further act on the part of any of the
parties hereto, anything herein to the contrary notwithstanding, provided that
such successor trustee shall be eligible under the provisions of Section 8.07.

                 Section 8.11.  Accounting Records and Reports.  The Trustee
shall keep proper books of record and account in which complete and correct
entries shall be made of all transactions relating to the receipt, investment,
disbursement, allocation and application of the Revenues and the proceeds of
the Bonds.  Such records shall specify the account or fund to which each
investment (or portion thereof) held by the Trustee is to be allocated and
shall set forth, in the case of each Investment Security, (a) its purchase
price, (b) identifying information, including par amount, interest rate, and
maturity dates, (c) the amount received at maturity or its sale price, as the
case may be, (d) the amounts and dates of any payments made with respect
thereto, and (e) such documentation as is required to be retained by the
Trustee as evidence to establish that the requirements of Article V of the Tax
Certificate have been met.  Such records shall be open to inspection by any
holder, the Company or the Issuer at any reasonable time during normal business
hours of the Trustee on reasonable notice.





                                          40
<PAGE>   45
                 Section 8.12.  Registrars.  The Issuer may appoint a registrar
for the Bonds and hereby appoints, as initial registrar, the Trustee.  Each
registrar shall be a bank, trust company or national banking association which
meets the qualifications of Section 8.07 hereof, willing and able to accept the
office on reasonable and customary terms and authorized by law to perform all
the duties imposed upon it hereby.  Each registrar (other than the Trustee, as
initial registrar) shall signify its acceptance of the duties and obligations
imposed upon it hereby by executing and delivering to the Issuer and the
Trustee a written acceptance thereof.

                 Section 8.13.  Appointment of Separate or Co-Trustee.  It is
the purpose of this Indenture that there shall be no violation of any law of
any jurisdiction (including, without limitation, the law of the State of
Nevada) denying or restricting the rights of banking corporations or
associations to transact business as trustees in such jurisdiction.  It is
recognized that in the event that the Trustee shall not be permitted to, by
reason of litigation under this Indenture or the Agreement or the enforcement
thereof on default, or in the event that the Trustee deems that by reason of
any present or future laws of any jurisdiction, it may not, exercise any of the
powers, rights or remedies herein granted to the Trustee or hold title to the
properties or estates, in trust, as herein granted, or take any action which
may be desirable or necessary in connection therewith, the Trustee shall have
the power to appoint an additional Person or Persons (which need not meet the
eligibility requirements set forth in Section 8.07) as separate or co-trustee.
The following provisions are adapted to those ends.

                 In the event that the Trustee appoints an additional Person as
separate or co-trustee, each and every power, right, remedy, duty, obligation,
property or estate expressed by this Indenture to be exercised by or vested in
or conveyed to the Trustee with respect thereto shall be exercisable by, vested
in, assumed by and conveyed to such separate or co-trustee but only to the
extent necessary to enable such separate or co-trustee to exercise such powers,
rights and remedies, or perform such duties and obligations, and only to the
extent that the Trustee by the laws of any jurisdiction (including, without
limitation, the State of Nevada) is incapable of exercising, assuming or being
vested with or conveyed such powers, rights, remedies, duties, obligations,
properties or estates, and every covenant and obligation necessary to the
exercise thereof by such separate or co-trustee shall run to and be enforceable
by the Trustee or such separate or co-trustee, subject to all the provisions of
this Indenture including every provision relating to the conduct of, affecting
the liability of, or affording protection to, the Trustee.  Any power, right,
remedy, duty or obligation conferred or imposed upon the Trustee shall be
conferred or imposed upon and exercised or performed by the Trustee and such
separate or co-trustee jointly, except to the extent that under the law of any
jurisdiction in which any particular act or acts are to be performed (including
the holding of title to the Trust Estate)





                                          41
<PAGE>   46
the Trustee shall be incompetent or incapable to perform such act or acts, in
which event such powers, rights, remedies, duties and obligations shall be
exercised and performed only by such separate or co-trustee.  No power which
pursuant to this Section 8.13 is exercisable by any such separate or co-trustee
may be exercised except jointly with, or with the written consent of, the
Trustee, and no appointment of, or action by, any separate or co-trustee shall
relieve the Trustee of any of its obligations hereunder or otherwise affect the
terms of this Indenture or the interests of the holders of the Bonds in the
Trust Estate.  The Trustee shall give written notice of the appointment of any
separate or co- trustee to the Issuer and the Company, but shall not be
required to give notice of such appointment to the Bondholders.

                 Should any instrument in writing from the Issuer be required
by the separate or co-trustee so appointed by the Trustee for more fully and
certainly vesting in and confirming to him or it such powers, rights, remedies,
duties, obligations, properties or estates hereunder, any and all such
instruments in writing shall, on request, if such instruments impose no
additional duties, responsibilities or liabilities on the Issuer or otherwise
adversely affect the Issuer, be executed, acknowledged and delivered by the
Issuer at the expense of the Company.  Any notice, demand, request or other
instrument or writing given to the Trustee shall be deemed to have been given
to each of the separate and co-trustees as effectively as if given to each of
them.  In case any separate or co-trustee or a successor to either shall die,
become incapable of acting, resign or be removed, all the powers, rights,
remedies, duties, obligations and interests of such separate or co- trustee
hereunder, so far as permitted by law, shall vest in and be executed by the
Trustee.  The Trustee shall be entitled to remove any separate or co-trustee
appointed by the Trustee upon written notice to the Issuer, the Company and
such separate or co-trustee.  The Trustee shall immediately remove any separate
or co-trustee appointed by it hereunder upon cessation of the conditions
requiring such appointment.

                 Section 8.14.  Notices to the Issuer.  The Trustee shall
provide the Issuer with the following:

                 (a)      Upon any significant change that occurs which would
adversely impact the Trustee's ability to perform its duties under the
Indenture, a written disclosure of any such change, or if applicable, of any
conflicts that the Trustee may have as a result of other business dealings
between the Trustee and the Company; and if there are no such instances of a
significant change, or of a conflict existing, then a statement to that effect
shall be provided on or before each anniversary of the date of the Bonds while
any of the Bonds are Outstanding; and

                 (b)      If there is a failure to pay any amount of principal
of, premium, if any, or interest on the Bonds when due; or if there is a
failure of the Company to provide any notice,





                                          42
<PAGE>   47
certification or report specified in Section 5.3 of the Agreement; or if there
is an occurrence of any other Event of Default hereunder of which a Responsible
Officer of the Trustee has actual knowledge, the Trustee shall provide written
notice to the Issuer within five (5) Business Days of such occurrence and such
notice shall include a statement setting forth the steps the Trustee is taking
to remedy such failure or Event of Default, as applicable.

                 Section 8.15.  Special Bondholder Requests.  Upon receipt of a
written request from a person or entity stating that such person or entity is
the beneficial owner of Bonds, the Trustee shall send, to the address
designated by such beneficial owner:

                 (i)      at the time any notice is given to Bondholders
         pursuant to this Indenture, a copy of any such notice;

                (ii)      upon reasonable request and payment by such
         beneficial owner of processing and mailing expenses, a report
         specifying (A) the amount of Bonds then Outstanding, (B) a redemption
         history with respect to the Bonds which shall include redemption dates
         and redemption prices with respect to all redemptions prior to the
         date of such report, and (C) the current status of insurance coverage
         with respect to the Project (to the extent the Company has provided
         information with respect thereto); and

               (iii)      within fifteen (15) days after the occurrence of an
         Event of Default under clause (a) or (b) of the first paragraph of
         Section 7.01 or upon receipt by a Responsible Officer of the Trustee
         of actual knowledge of the occurrence of any other Event of Default,
         notice by Mail of any such Event of Default, unless such Event of
         Default is cured or waived prior to the giving of such notice.

                 Neither the Issuer nor the Trustee shall be liable for any
failure by the Trustee to send any report or notice specified in this Section
8.15 to any beneficial owner, or any defect contained in any such report or
notice, and any such failure or defect shall not affect the sufficiency of any
proceedings under this Indenture.


                                   ARTICLE IX

                      MODIFICATION OF INDENTURE, DOCUMENTS

                 Section 9.01.  Modification without Consent of Bondholders.
The Issuer and the Trustee, without the consent of or notice to any
Bondholders, from time to time and at any time, and subject to the conditions
and restrictions contained in this Indenture, may enter into an indenture or
indentures supplemental hereto, which indenture or indentures thereafter shall
form a part hereof; and the Trustee, without the consent of or notice to





                                          43
<PAGE>   48
any Bondholders, from time to time and at any time, may consent to an amendment
or modification to the Financing Agreement or to any other document, instrument
or agreement relating to the security for the Bonds; in each case for any one
or more of the following purposes:

                 (a)      to add to the covenants and agreements of the Issuer
         contained in this Indenture, or of the Company contained in the
         Financing Agreement, other covenants and agreements thereafter to be
         observed, or to assign or pledge additional security for the Bonds, or
         to surrender any right or power reserved to or conferred upon the
         Issuer herein or reserved to or conferred upon the Company in the
         Financing Agreement;

                 (b)      to make such provisions for the purpose of curing any
         ambiguity, inconsistency or omission, or of curing, correcting or
         supplementing any defective provision contained in this Indenture or
         in the Financing Agreement or such other document, instrument or
         agreement, or in regard to matters or questions arising under this
         Indenture or the Financing Agreement, as the Issuer may deem necessary
         or desirable and not inconsistent with this Indenture;

                 (c)      to modify, amend or supplement this Indenture or any
         indenture supplemental hereto in such manner as to permit the
         qualification hereof or thereof under the Trust Indenture Act of 1939
         or any similar federal statute hereafter in effect, and, if they so
         determine, to add to this Indenture or any indenture supplemental
         hereto such other terms, conditions and provisions as may be permitted
         by said Trust Indenture Act of 1939 or similar federal statute;

                 (d)      to provide for any additional procedures, covenants
         or agreements necessary to maintain the Tax-exempt status of interest
         on the Bonds;

                 (e)      to provide for any modifications in the book-entry
         registration system for the Bonds, or to eliminate such system;

                 (f)      to provide for the procedures required to permit any
         Bondholder to separate the right to receive interest on the Bonds from
         the right to receive principal thereof and to sell or dispose of such
         rights, as contemplated by Section 1286 of the Code;

                 (g)      to provide for the appointment of a co-trustee or the
         succession of a new Trustee;

                 (h)      to change Exhibit A to the Financing Agreement in
         accordance with the provisions thereof and of the Tax Certificate and
         the Engineering Certificate; and





                                          44
<PAGE>   49
                 (i)      in connection with any other change which, in the
         judgment of the Trustee, will not adversely affect the security for
         the Bonds or the Tax-exempt status thereof or otherwise materially
         adversely affect the holders of the Bonds.

                 Notwithstanding the foregoing, the Trustee shall not enter
into any such Supplemental Indenture during such time as no Event of Default
shall have occurred and be continuing without first obtaining the written
consent of the Company.

                 Section 9.02.  Modification with Consent of Bondholders.  With
the consent of the holders of not less than sixty percent (60%) in aggregate
principal amount of the then Outstanding Bonds, evidenced as provided in
Section 11.08, (i) the Issuer and the Trustee may from time to time and at any
time enter into an indenture or indentures supplemental hereto for the purpose
of adding any provisions to or changing in any manner or eliminating any of the
provisions of this Indenture or of any Supplemental Indenture; or (ii) the
Trustee may consent to any of the matters for which its consent is required
pursuant to Section 6.04 hereof, including any amendment to or modification of
the Financing Agreement or any other document relating to the security for the
Bonds; provided, however, that no such amendment or modification will have the
effect of extending the time for payment or reducing any amount due and payable
by the Company pursuant to the Financing Agreement without the consent of all
the holders of the Bonds; and that no such Supplemental Indenture shall (1)
extend the fixed maturity of any Bond or reduce the rate of interest thereon or
extend the time of payment of interest, or reduce the amount of the principal
thereof, or reduce any premium payable on the redemption thereof, without the
consent of the holder of each Bond so affected, or (2) reduce the aforesaid
percentage of holders of Bonds whose consent is required for the execution of
such amendments to the Financing Agreement or other documents or such
Supplemental Indentures, or extend the time of payment, or permit the creation
of any lien on the Trust Estate prior to or on a parity with the lien of this
Indenture, except as permitted herein, or permit the creation of any preference
of any Bondholder over any other Bondholder or deprive the holders of the Bonds
of the lien created by this Indenture upon the Trust Estate, without the
consent of the holders of all the Bonds then Outstanding.  Upon receipt by the
Trustee of a Certified Resolution authorizing the execution of any such
Supplemental Indenture, and upon the filing with the Trustee of evidence of the
consent of Bondholders, as aforesaid, the Trustee shall join with the Issuer in
the execution of such Supplemental Indenture, unless (i) such Supplemental
Indenture affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise, in which case the Trustee may in its discretion, but
shall not be obligated to, enter into such Supplemental Indenture; or (ii) such
Supplemental Indenture affects the rights or obligations of the Company
hereunder or under the Financing Agreement, in which case the Trustee shall





                                          45
<PAGE>   50
enter into such Supplemental Indenture only if the Trustee has received the
Company's written consent thereto.

                 It shall not be necessary for the consent of the Bondholders
under this Section to approve the particular form of any proposed Supplemental
Indenture or amendment to any document, but it shall be sufficient if such
consent shall approve the substance thereof.

                 Promptly after the execution by the Issuer and the Trustee of
any Supplemental Indenture, or the execution of any amendment of any other
document, pursuant to the provisions of this Section, the Trustee shall mail a
notice (which shall be supplied to the Trustee by and at the expense of the
Company) setting forth in general terms the substance of such Supplemental
Indenture or amendment, to each Bondholder at the address contained in the bond
register maintained by the Trustee.  Any failure of the Trustee to give such
notice, or any defect therein, shall not, however, in any way impair or affect
the validity of any such Supplemental Indenture or amendment.

                 Section 9.03.  Effect of Supplemental Indenture.  Upon the
execution of any Supplemental Indenture pursuant to the provisions of this
Article IX, this Indenture shall be and be deemed to be modified and amended in
accordance therewith, and the respective rights, duties and obligations under
this Indenture of the Issuer, the Trustee and all holders of Outstanding Bonds
shall thereafter be determined, exercised and enforced hereunder subject in all
respects to such modifications and amendments, and all the terms and conditions
of any such Supplemental Indenture shall be part of the terms and conditions of
this Indenture for any and all purposes.

                 Section 9.04.  Required and Permitted Opinions of Counsel.  No
Supplemental Indenture, amendment to the Financing Agreement or other action
otherwise permitted by the provisions of Sections 9.01 or 9.02 hereof shall be
effective unless the Trustee shall have received an opinion of Bond Counsel to
the effect that the provisions of such Supplemental Indenture or amendment or
such other action will not adversely affect the Tax-exempt status of interest
on the Bonds.  Subject to the provisions of Section 8.01, the Trustee may
receive an Opinion of Counsel as conclusive evidence that any Supplemental
Indenture executed pursuant to the provisions of this Article IX complies with
the requirements of this Article IX, that the appropriate consents have been
obtained and that such Supplemental Indenture has been duly authorized by the
Issuer.

                 Section 9.05.  Notation of Modification on Bonds; Preparation
of New Bonds.  Bonds authenticated and delivered after the execution of any
Supplemental Indenture pursuant to the provisions of this Article IX may bear a
notation, in form approved by the Trustee, as to any matter provided for in
such Supplemental Indenture, and if such Supplemental Indenture shall so
provide, new Bonds, so modified as to conform, in the opinion





                                          46
<PAGE>   51
of the Trustee and the Issuer, to any modification of this Indenture contained
in any such Supplemental Indenture, may be prepared by the Issuer,
authenticated by the Trustee and delivered without cost to the holders of the
Bonds then Outstanding, upon surrender for cancellation of such Bonds in equal
aggregate principal amounts.


                                   ARTICLE X

                                   DEFEASANCE

                 Section 10.01.  Discharge of Indenture.  If the entire
indebtedness on all Bonds Outstanding shall be paid and discharged in any one
or more of the following ways:

                 (a)      by the payment of the principal of (including
         redemption premium, if any) and interest on Bonds Outstanding, as and
         when the same become due and payable; or

                 (b)      by the delivery to the Trustee, for cancellation by
         it, of all Bonds Outstanding;

and if all other sums payable hereunder by the Issuer shall be paid and
discharged, then thereupon this Indenture shall cease, terminate and become
null and void except only as provided in Section 10.02 hereof, and thereupon
the Trustee shall, upon Written Request of the Issuer, and upon receipt by the
Trustee of a Certificate of the Issuer and an Opinion of Counsel, each stating
that in the opinion of the signers all conditions precedent to the satisfaction
and discharge of this Indenture have been complied with, forthwith execute
proper instruments acknowledging satisfaction of and discharging this
Indenture.  The satisfaction and discharge of this Indenture shall be without
prejudice to the rights of the Trustee to charge and be reimbursed by the
Company for any expenditures which it may thereafter incur in connection
herewith, as provided in the Agreement.

                 Any Bond or Authorized Denomination thereof shall be deemed to
be paid within the meaning of this Indenture when (a) payment of the principal
of and premium, if any, on such Bond or Authorized Denomination thereof, plus
interest thereon to the due date thereof (whether such due date is by reason of
maturity or upon redemption as provided herein) either (i) shall have been made
or caused to be made in accordance with the terms thereof, or (ii) shall have
been provided for by irrevocably depositing with the Trustee in trust and
irrevocably setting aside exclusively for such payment (1) moneys sufficient to
make such payment and/or (2) Permitted Investments maturing as to principal and
interest in such amount and at such time as will insure the availability of
sufficient moneys (as verified by a nationally recognized certified public
accountant) to make such payment, and (b) all necessary and proper fees,
compensation and expenses of the Trustee pertaining to any such deposit shall
have been paid





                                          47
<PAGE>   52
or the payment thereof provided for to the satisfaction of the Trustee.  At
such times as a Bond or Authorized Denomination thereof shall be deemed to be
paid hereunder, as aforesaid, such Bond or Authorized Denomination thereof
shall no longer be secured by or entitled to the benefits of this Indenture,
except for the purposes of any such payment from such moneys or Permitted
Investments.

                 The Issuer or the Company may at any time surrender to the
Trustee for cancellation by it any Bonds previously authenticated and delivered
which the Issuer or the Company lawfully may have acquired in any manner
whatsoever, and such Bonds, upon such surrender and cancellation, shall be
deemed to be paid and retired.

                 Section 10.02.  Discharge of Liability on Bonds.  Upon the
deposit with the Trustee, in trust, at or before maturity, of money or
securities as provided in Section 10.01 in the necessary amount (as provided in
Section 10.04) to pay or redeem Outstanding Bonds (whether upon or prior to
their maturity, in accordance with Section 10.01 hereof, or on the redemption
date, in accordance with Article IV hereof, of such Bonds), provided that, if
such Bonds are to be redeemed prior to the maturity thereof, notice of such
redemption shall have been given as in Article IV provided or provision
satisfactory to the Trustee shall have been made for giving such notice, all
liability of the Issuer and the Company in respect of Bonds shall cease,
terminate and be completely discharged, except only that thereafter the holders
thereof shall thereafter be entitled only to payment by the Issuer, and the
Issuer shall remain liable for such payment, but only out of the money
deposited with the Trustee as aforesaid for their payment, provided further,
however, that the provisions of Section 10.03 shall apply in all events.  Upon
any such deposit of funds, unless the Bonds will mature or notice of redemption
is to be given within ten (10) days after such deposit, the Trustee shall,
within ten (10) days after such deposit, give notice, in such form as may be
deemed appropriate by the Trustee, to the effect that such deposit has been
made, with the effect set forth in this Section, such notice to be given by
publication in a Qualified Newspaper and by Mail to the holders of the Bonds.

                 Section 10.03.  Payment of Bonds after Discharge of Indenture.
Notwithstanding any provisions of this Indenture, any moneys deposited with the
Trustee or any paying agent in trust for the payment of the principal of, or
interest or premium on, any Bonds remaining unclaimed for two (2) years after
the principal of any or all the Outstanding Bonds has become due and payable
(whether at maturity or upon call for redemption or by declaration as provided
in this Indenture), shall then be repaid to the Company upon its Written
Request, and the holders of such Bonds shall thereafter be entitled to look
only to the Company for payment thereof, and all liability of the Trustee or
any paying agent with respect to such moneys shall thereupon cease; provided,
however, that before the repayment of such moneys to





                                          48
<PAGE>   53
the Company as aforesaid, the Trustee or paying agent, as the case may be, may
(at the cost of the Company) first publish at least once in a Qualified
Newspaper a notice, in such form as may be deemed appropriate by the Trustee or
such paying agent, in respect of the Bonds so payable and not presented and in
respect of the provisions relating to the repayment to the Company of the
moneys held for the payment thereof.  In the event of the repayment of any such
moneys to the Company as aforesaid, the holders of the Bonds in respect of
which such moneys were deposited shall thereafter be deemed to be unsecured
creditors of the Company for amounts equivalent to the respective amounts
deposited for the payment of such Bonds and so repaid to the Company (without
interest thereon).

                 Section 10.04.  Deposit of Money or Securities with Trustee.
Whenever in this Indenture it is provided or permitted that there be deposited
with or held in trust by the Trustee money or securities in the necessary
amount to pay or redeem any Bonds, the money or securities so to be deposited
or held may include money or securities held by the Trustee in the funds and
accounts established pursuant to this Indenture and shall be:

                 (a)      lawful money of the United States of America in an
         amount equal to the principal amount of such Bonds and all unpaid
         interest thereon to maturity, except that, in the case of Bonds which
         are to be redeemed prior to maturity and in respect of which notice of
         such redemption shall have been given as provided in Article IV or
         provision satisfactory to the Trustee shall have been made for the
         giving of such notice, the amount to be deposited or held shall be the
         principal amount or redemption price of such Bonds and all unpaid
         interest thereon to the redemption date; or

                 (b)      Permitted Investments (not callable by the issuer
         thereof prior to maturity) the principal of and the interest on which
         when due will provide money sufficient to pay the principal or
         redemption price of and all unpaid interest to maturity, or to the
         redemption date, as the case may be, on the Bonds to be paid or
         redeemed, as such principal or redemption price and interest become
         due, provided that, in the case of Bonds which are to be redeemed
         prior to the maturity thereof, notice of such redemption shall have
         been given as provided in Article IV or provision satisfactory to the
         Trustee shall have been made for the giving of such notice;

provided, in each case, that (i) the Company shall furnish to the Trustee an
opinion of Bond Counsel to the effect that such deposit will not, in and of
itself, adversely affect the Tax-exempt status of interest on the Bonds and
(ii) the Trustee shall have been irrevocably instructed (by the terms of this
Indenture or by Request of the Issuer) to apply such money to the payment of
such principal or redemption price and interest with respect to such Bonds.





                                          49
<PAGE>   54

                                   ARTICLE XI

                                 MISCELLANEOUS

                 Section 11.01.  Successors of the Issuer.  All the covenants,
stipulations, promises and agreements in this Indenture contained, by or on
behalf of the Issuer, shall bind and inure to the benefit of its successors and
assigns, whether so expressed or not.  If any of the powers or duties of the
Issuer shall hereafter be transferred by any law of the State of Nevada, and if
such transfer shall relate to any matter or thing permitted or required to be
done under this Indenture by the Issuer, then the body or official of the State
of Nevada who shall succeed to such powers or duties shall act and be obligated
in the place and stead of the Issuer as provided in this Indenture.

                 Section 11.02.  Limitation of Rights to Parties and
Bondholders.  Nothing in this Indenture or in the Bonds expressed or implied is
intended or shall be construed to give to any person other than the Issuer, the
Trustee, the Company and the holders of the Bonds issued hereunder any legal or
equitable right, remedy or claim under or in respect of this Indenture or any
covenant, condition or provision therein or herein contained; and all such
covenants, conditions and provisions are and shall be held to be for the sole
and exclusive benefit of the Issuer, the Trustee, the Company and the holders
of the Bonds issued hereunder.

                 Section 11.03.  Waiver of Notice.  Whenever in this Indenture
the giving of Notice by Mail or otherwise is required, the giving of such
notice may be waived in writing by the person entitled to receive such notice
and in any such case the giving or receipt of such notice shall not be a
condition precedent to the validity of any action taken in reliance upon such
waiver.

                 Section 11.04.  Destruction of Bonds.  Whenever in this
Indenture provision is made for the cancellation by the Trustee of any Bonds,
the Trustee may, in lieu of such cancellation, destroy such Bonds, and, if
requested in writing, deliver a certificate of such destruction to the Issuer.

                 Section 11.05.  Separability of Invalid Provisions.  In case
any one or more of the provisions contained in this Indenture or in the Bonds
shall for any reason be held to be invalid, illegal or unenforceable in any
respect, such invalidity, illegality or unenforceability shall not affect any
other provision of this Indenture, but this Indenture shall be construed as if
such invalid or illegal or unenforceable provision had never been contained
herein.

                 Section 11.06.  Governing Law.  This Indenture shall be
governed by and construed in accordance with the applicable laws of the State
of Nevada, except that the Trustee's obligations and





                                          50
<PAGE>   55
duties shall be governed by and construed in accordance with the laws of the
State of New York.

                 Section 11.07.  Notices.  It shall be sufficient service of
any notice, request, complaint, demand or other paper on the Issuer, the
Trustee or the Company if the same shall be duly mailed by registered or
certified mail, postage prepaid, addressed as follows:

To the Issuer:            Clark County, Nevada
                          225 Bridger Avenue
                          Las Vegas, NV  89155
                          Attention:  County Manager

To the Company:           Southwest Gas Corporation
                          5241 Spring Mountain Road
                          P.O. Box 98510
                          Las Vegas, NV  89193-8510
                          Attention:  Treasurer

To the Trustee:           Harris Trust and Savings Bank
                          311 West Monroe Street, 12th Floor
                          Chicago, Illinois 60608
                          Attention:  Indenture Trust Department

The Issuer, the Trustee and the Company may, by notice given hereunder,
designate any further or different addresses to which subsequent notices,
certificates or other communications shall be sent.  Unless specifically
otherwise required by the context of this Indenture, any notices required to be
given hereunder to the Trustee, the Issuer, the Company or the Trustee may be
given by any form of electronic transmission capable of producing a written
record.  Each such party shall file with the Trustee information appropriate to
receiving such form of electronic transmission.  A duplicate copy of each
notice, certificate or other communication given hereunder by the Issuer or the
Trustee to the other shall also be given to the Company.

                 Section 11.08.  Evidence of Rights of Bondholders.  (a) Any
request, consent or other instrument required by this Indenture to be signed
and executed by Bondholders may be in any number of concurrent writings of
substantially similar tenor and may be signed or executed by such Bondholders
in person or by agent or agents duly appointed in writing.  Proof of the
execution of any such request, consent or other instrument or of a writing
appointing any such agent, shall be sufficient for any purpose of this
Indenture and shall be conclusive in favor of the Trustee, and of the Issuer if
made in the manner provided in this Section.

                 (b)      The fact and date of the execution by any person of
any such request, consent or other instrument or writing may be proved by the
affidavit of a witness of such execution or by the certificate of any notary
public or other officer of any jurisdiction, authorized by the laws thereof to
take





                                          51
<PAGE>   56
acknowledgments of deeds, certifying that the person signing such request,
consent or other instrument or writing acknowledged to him the execution
thereof.

                 (c)      The ownership of Bonds shall be proved by the Bond
register maintained by the Trustee pursuant to Section 2.04 hereof.  The
Trustee and the Issuer may conclusively assume that such ownership continues
until written notice to the contrary is served upon the Trustee.  The fact and
the date of execution of any request, consent or other instrument and the
amount and distinguishing numbers of Bonds held by the person so executing such
request, consent or other instrument may also be proved in any other manner
which the Trustee may deem sufficient.  The Trustee may nevertheless, in its
discretion, require further proof in cases where it may deem further proof
desirable.

                 Any request, consent or vote of the holder of any Bond shall
bind every future holder of the same Bond and the holder of any Bond issued in
exchange therefor or in lieu thereof, in respect of anything done or suffered
to be done by the Trustee or the Issuer in pursuance of such request, consent
or vote.

                 (d)      In determining whether the holders of the requisite
aggregate principal amount of Bonds have concurred in any demand, request,
direction, consent or waiver under this Indenture, Bonds which are owned by the
Issuer, by the Company or by any other direct or indirect obligor on the Bonds,
or by any person directly or indirectly controlling or controlled by, or under
direct or indirect common control with, the Issuer, the Company, or any other
direct or indirect obligor on the Bonds, shall be disregarded and deemed not to
be Outstanding for the purpose of any such determination, provided that, for
the purpose of determining whether the Trustee shall be protected in relying on
any such demand, request, direction, consent or waiver, only Bonds which the
Trustee knows to be so owned shall be disregarded.  Bonds so owned which have
been pledged in good faith may be regarded as Outstanding for the purposes of
this subsection (d) if the pledgee shall establish to the satisfaction of the
Trustee the pledgee's right to vote such Bonds and that the pledgee is not a
person directly or indirectly controlling or controlled by, or under direct or
indirect common control with, the Issuer, the Company or any other direct or
indirect obligor on the Bonds.  In case of a dispute as to such right, any
decision by the Trustee taken upon the advice of counsel shall be full
protection to the Trustee.

                 (e)      In lieu of obtaining any demand, request, direction,
consent or waiver in writing, the Trustee may call and hold a meeting of the
Bondholders upon such notice and in accordance with such rules and regulations
as the Trustee considers fair and reasonable for the purpose of obtaining any
such action.

                 Section 11.09.  Waiver of Personal Liability.  No member,
officer, agent or employee of the Issuer, and no officer,





                                          52
<PAGE>   57
official, agent or employee of the State of Nevada or any department, board or
agency of the foregoing shall be individually or personally liable for the
payment of the principal of or premium or interest on the Bonds or be subject
to any personal liability or accountability by reason of the issuance thereof;
but nothing herein contained shall relieve any such member, officer, agent or
employee from the performance of any official duty provided by law or by this
Indenture.

                 Section 11.10.  Publication of Notices.  Any publication of
notice to be made under the provisions of this Indenture may be made in each
instance upon any Business Day.

                 Section 11.11.  Execution in Several Counterparts.  This
Indenture may be executed in any number of counterparts and each of such
counterparts shall for all purposes be deemed to be an original; and all such
counterparts, or as many of them as the Issuer and the Trustee shall preserve
undestroyed, shall together constitute but one and the same instrument.

                 Section 11.12.  Business Days.  If any date specified herein
shall not be a Business Day, any action required on such date may be made on
the next succeeding Business Day with the same effect as though made on such
date and no interest shall accrue for the period after such date.





                                          53
<PAGE>   58
                 IN WITNESS WHEREOF, Clark County, Nevada has caused this
Indenture to be executed by its Chairman, Board of County Commissioners, and
Harris Trust and Savings Bank has caused this Indenture to be executed in its
behalf by its duly authorized signatory, all as of the day and year first above
written.

                                                 CLARK COUNTY, NEVADA



                                                 By ____________________________
                                                         Chairman, Board of
                                                        County Commissioners


Attest:



_____________________________
        County Clerk
                                                 HARRIS TRUST AND SAVINGS BANK,
                                                    as Trustee



                                                 By ____________________________
                                                 Title:  





                                          54
<PAGE>   59
                                   EXHIBIT A

                                 [FORM OF BOND]

No. A-__                                                             $

                              CLARK COUNTY, NEVADA
                      INDUSTRIAL DEVELOPMENT REVENUE BONDS
                          (SOUTHWEST GAS CORPORATION)
                                 1993 SERIES A


<TABLE>
<CAPTION>
  Interest Rate                           Maturity Date                    Dated Date             CUSIP 
- -----------------                       ----------------                   ----------            -------
<S>                                     <C>                                <C>                    <C>
                                        December 1, 2033                                          XXXXX
</TABLE>

Registered Owner:

Principal Amount:                                       DOLLARS


                 CLARK COUNTY, NEVADA, a political subdivision of the State of
Nevada (the "Issuer"), for value received, hereby promises to pay (but only out
of Revenues as hereinafter provided) to the registered owner identified above
or registered assigns, on the maturity date set forth above, the principal sum
set forth above and to pay (but only out of the source hereinafter provided)
interest at the interest rate per annum set forth above on the balance of said
principal amount from time to time remaining unpaid from and including the date
hereof until payment of said principal amount has been made or duly provided
for the principal of and premium, if any, on this Bond being payable at final
maturity or redemption in lawful money of the United States of America at the
principal corporate trust office of ___________________________, or its
successor in trust, as trustee (the "Trustee"), which initially is at
_________________, _________________, _________________, Attention:
_______________.  Interest payments on this Bond shall be made by the Trustee,
or its successors and assigns, as paying agent with respect to the Bonds (as
defined in the Indenture), on June 1 and December 1 in each year, commencing
June 1, 1994, and at final maturity (an "Interest Payment Date") to the
registered owner hereof as of the close of business at the principal office of
the Trustee on the fifteenth day of the calendar month preceding any Interest
Payment Date (the "Record Date"), and shall be paid by check or draft mailed on
the Interest Payment Date to such registered owner at its address as it appears
on the registration books of the Issuer maintained by the Trustee, or its
successors and assigns, or at such other address as is furnished in writing by
such registered owner to the Trustee not later than the Record Date; provided
that the Trustee will, at the request of any registered owner of $1,000,000 or
more in aggregate principal amount of Bonds, make payments of interest on such
Bonds by wire transfer in immediately available funds to the account designated
by such owner to the Trustee in writing at least two (2) Business





                                         A-1
<PAGE>   60
Days before the Record Date for such payments, any such designation to remain
in effect until withdrawn.

                 No member or officer of the Issuer, nor any person executing
this Bond, shall in any event be subject to any personal liability or
accountability by reason of the issuance of the Bonds.

                 The Bonds are authorized to be issued pursuant to the County
Economic Development Revenue Bond Law, Sections 244A.669 to 244A.763,
inclusive, of the Nevada Revised Statutes, as amended (herein called the
"Act").  The Bonds are special, limited obligations of the Issuer and, as and
to the extent set forth in the Indenture, are payable solely from, and secured
by a pledge of and lien on, the Revenues (as that term is defined in the
Indenture).  Proceeds from the sale of the Bonds are to be loaned by the Issuer
to Southwest Gas Corporation (the "Company") under the terms of a Financing
Agreement, dated as of December 1, 1993 (the "Agreement"), between the Issuer
and the Company.  The Bonds are all issued under and secured by and entitled to
the benefits of the Indenture, including the security of a pledge and
assignment of certain revenues and receipts derived by the Issuer pursuant to
the Agreement, and all receipts of the Trustee credited under the provisions of
the Indenture against such payments, and from any other moneys held by the
Trustee under the Indenture for such purpose, and there shall be no other
recourse against the Issuer or any property now or hereafter owned by it.

                 THE BONDS SHALL BE SPECIAL, LIMITED OBLIGATIONS OF THE ISSUER
PAYABLE SOLELY FROM THE REVENUES OF THE ISSUER PLEDGED THEREFOR UNDER THE
INDENTURE.  THE BONDS SHALL NEVER CONSTITUTE THE DEBT OR INDEBTEDNESS OF THE
ISSUER OR THE STATE OF NEVADA (OR ANY POLITICAL SUBDIVISION THEREOF) WITHIN THE
MEANING OF ANY PROVISION OR LIMITATION OF THE CONSTITUTION OR STATUTES OF THE
STATE OF NEVADA, AND SHALL NOT CONSTITUTE NOR GIVE RISE TO A PECUNIARY
LIABILITY OF THE ISSUER OR A CHARGE AGAINST ITS GENERAL CREDIT OR TAXING
POWERS.

                 This Bond is one of a duly authorized issue of bonds of the
Issuer designated as the "Clark County, Nevada Industrial Development Revenue
Bonds (Southwest Gas Corporation) 1993 Series A" (the "Bonds"), limited in
aggregate principal amount as provided in, and issued under and secured by, an
Indenture of Trust, dated as of December 1, 1993 (the "Indenture"), between the
Issuer and the Trustee.  Reference is hereby made to the Indenture and all
indentures supplemental thereto for a description of the rights thereunder of
the registered owners of the Bonds, of the nature and extent of the security,
of the rights, duties and immunities of the Trustee and of the rights and
obligations of the Issuer thereunder, to all of the provisions of which
Indenture the holder of this Bond, by acceptance hereof, assents and agrees.

                 The Indenture contains provisions permitting the Issuer and
the Trustee, with the consent of the holders of not less than





                                         A-2
<PAGE>   61
60% in aggregate principal amount of Bonds at the time Outstanding, evidenced
as in the Indenture provided, to execute Supplemental Indentures adding any
provisions to, or changing in any manner, or eliminating any of the provisions
of, the Indenture; provided, however, that no such Supplemental Indenture shall
(1) extend the fixed maturity of this Bond or reduce the rate of interest
hereon or extend the time of payment of interest, or reduce the amount of the
principal hereof, or reduce any premium payable on the redemption hereof,
without the consent of the holder hereof, or (2) reduce the aforesaid
percentage of holders of Bonds whose consent is required for the execution of
such Supplemental Indentures, or extend the time of payment, or permit the
creation of any lien on the Trust Estate prior to or on a parity with the lien
of the Indenture, or permit the creation of any preference of any Bondholder
over any other Bondholder or deprive the holders of the Bonds of the lien
created by the Indenture upon the Revenues, without the consent of the holders
of all Bonds then Outstanding.  The Indenture also contains provisions
permitting the Issuer and the Trustee, without the consent of any holders of
the Bonds, to execute Supplemental Indentures for certain purposes specified in
the Indenture.

                 The Bonds are issuable as fully registered bonds without
coupons in denominations of $5,000 or any integral multiple thereof (herein
"Authorized Denominations").  Subject to the limitations and upon payment of
the charges, if any, provided in the Indenture, Bonds may be exchanged at the
principal office of the Trustee for a like aggregate principal amount of Bonds
of like tenor, of other Authorized Denominations.

                 This Bond is transferable by the registered owner hereof, in
person, or by its attorney duly authorized in writing, at the principal
corporate trust office of the Trustee, but only in the manner, subject to the
limitations and upon payment of the charges provided in the Indenture, and upon
surrender and cancellation of this Bond.  Upon such transfer a new fully
registered Bond or Bonds of like tenor, in an Authorized Denomination, for the
same aggregate principal amount, will be issued to the transferee in exchange
herefor.  No transfer of Bonds shall be required to be made (a) during the
period commencing seven (7) Business Days preceding the giving of notice of
redemption and ending on the date such notice is given, or (b) after any Record
Date and prior to the related Interest Payment Date.

                 The Bonds are subject to redemption at any time at a
redemption price equal to the principal amount thereof plus accrued interest,
if any, to the redemption date upon receipt by the Trustee of a written notice
from the Company stating it intends to exercise its option to prepay the
payments due under the Agreement and thereby effect the redemption of the Bonds
(i) in whole upon the occurrence of one or more extraordinary events as
described in the Indenture, or (ii) in whole or in part upon certain tax events
of the Company (in which case the





                                         A-3
<PAGE>   62
redemption price would also include a premium of 3% of the principal amount of
the Bonds so called for redemption), all as set forth in the Indenture.

                 On and after December 1, 2003, the Bonds are subject to
redemption in whole or in part on any date, at the option of the Issuer on the
direction of the Company, at the redemption prices (expressed as percentages of
principal amount) set forth below, plus accrued interest, if any, to the
redemption date:

<TABLE>
<CAPTION>
        Redemption Dates                       Redemption
          (inclusive)                            Prices  
        ----------------                       ----------
<S>                                               <C>
December 1, 2003, through November 30, 2004       102%
December 1, 2004, through November 30, 2005       101%
December 1, 2005 and thereafter                   100%
</TABLE>

                 The Bonds are subject to mandatory redemption prior to
maturity, at any time at a redemption price equal to the principal amount
thereof plus accrued interest thereon to the redemption date (i) in whole, or
in certain circumstances in part, upon the occurrence of a Determination of
Taxability, as defined in the Indenture, and (ii) in part after the Completion
Date, from excess proceeds.  The Bonds shall be redeemed as provided in this
paragraph in part in the case of a Determination of Taxability if, in the
opinion of nationally recognized bond counsel delivered to the Trustee, the
redemption of a specified portion of the Outstanding Bonds would have the
result that interest payable on such Bonds remaining Outstanding after such
redemption would not be includable for federal income tax purposes in the gross
income of any registered owner of any Bond (other than a registered owner who
is a "substantial user" of the Project or the Big Bear Lake Project (as defined
in the Indenture) or a "related person" within the meaning of Section 147(a) of
the Code).  Such partial redemption shall be in such amount as Bond Counsel in
such opinion shall have determined is necessary to accomplish such result.

                 If less than all of the Bonds are to be redeemed, the
particular Bonds to be redeemed shall be selected as provided in the Indenture.

                 Notice of any optional or mandatory redemption shall be given
by the Trustee by mail not less than 30 days nor more than 60 days prior to the
redemption date to the Issuer and the registered owners of each Bond at the
address shown on the registration books of the Trustee.

                 No recourse shall be had for the payment of the principal of,
premium, if any, or interest on any of the Bonds or for any claim based thereon
or upon any obligation, covenant or agreement in the Indenture contained,
against any past, present or future member, director, officer, employee or
agent of the Issuer, or through the Issuer, or any successor to the Issuer,
under any rule of law or equity, statute or constitution or by





                                         A-4
<PAGE>   63
the enforcement of any assessment or penalty or otherwise, and all such
liability of any such member, director, officer, employee or agent as such is
hereby expressly waived and released as a condition of and in consideration for
the execution of the Indenture and the issuance of any of the Bonds.

                 The holder of this Bond shall have no right to enforce the
provisions of the Indenture or to institute action to enforce the covenants
therein, or to take any action with respect to any Event of Default (as defined
in the Indenture) under the Indenture, or to institute, appear in or defend any
suit or other proceedings with respect thereto, except as provided in the
Indenture.  If an Event of Default occurs and is continuing, the principal of
all Bonds then Outstanding issued under the Indenture may become due and
payable upon the conditions and in the manner and with the effect provided in
the Indenture.

                 The Issuer, the Trustee and any agent of the Issuer or the
Trustee may treat the person in whose name this Bond is registered as the owner
hereof for the purpose of receiving payment as herein provided and for all
other purposes, whether or not this Bond be overdue, and the Issuer, the
Trustee, or any such agent shall not be affected by notice to the contrary.

                 The Indenture prescribes the manner in which it may be
discharged and after which the Bonds shall no longer be secured by or entitled
to the benefits of the Indenture, except for the purposes of registration and
exchange of Bonds and of payment of the principal of and redemption premium, if
any, and interest on the Bonds as the same become due and payable, including a
provision that under certain circumstances the Bonds shall be deemed to be paid
if certain securities, as defined therein, maturing as to principal and
interest in such amounts and at such times as to insure the availability of
sufficient moneys to pay the principal of, redemption premium, if any, and
interest on the Bonds and all necessary and proper fees, compensation and
expenses of the Trustee shall have been deposited with the Trustee.

                 It is hereby certified that all of the conditions, things and
acts required to exist, to have happened and to have been performed precedent
to and in the issuance of this Bond do exist, have happened and have been
performed in due time, form and manner as required by the Constitution and
statutes of the State of Nevada and that the amount of this Bond, together with
all other indebtedness of the Issuer, does not exceed any limit prescribed by
the Constitution or statutes of the State of Nevada.

                 This Bond shall not be entitled to any benefit under the
Indenture, or become valid or obligatory for any purpose, until the certificate
of authentication hereon endorsed shall have been manually signed by the
Trustee.





                                         A-5
<PAGE>   64
                 IN WITNESS WHEREOF, Clark County, Nevada has caused this Bond
to be executed with the facsimile signature of its Chairman of its Board of
County Commissioners and countersigned and executed with the facsimile
signature of its Treasurer and imprinted or reproduced hereon a facsimile of
its official seal and attested with the facsimile signature of its County
Clerk.


                                                CLARK COUNTY, NEVADA



                                                BY: ____________________________
                                                     CHAIRMAN, BOARD OF COUNTY
                                                           COMMISSIONERS



                                                COUNTERSIGNED:



                                                BY: ____________________________
                                                              TREASURER


(SEAL)

ATTEST:



____________________________
        COUNTY CLERK





                                         A-6
<PAGE>   65
                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                 This is one of the Bonds described in the within-mentioned
Indenture of Trust.

Date of Authentication:  ________________


                                                HARRIS TRUST AND SAVINGS BANK,
                                                   as Trustee



                                                By _____________________________
                                                         Authorized Officer


                                [ABBREVIATIONS]

                 The following abbreviations, when used in the inscription on
the face of the within bond and in the assignment below, shall be construed as
though they were written out in full according to applicable laws or
regulations.

<TABLE>
                   <S>            <C>
                   TEN COM--      as tenants in common

                   TEN ENT--      as tenants by the entireties

                   JT TEN--       as joint tenants with right of survivorship and not as tenants in common
</TABLE>

                   Additional abbreviations may also be used
                         though not in the above list.

                   UNIF GIFT/TRAN MIN ACT--_______      Custodian __________ 
                                           (Cust)                   (Minor) 
                                      Under Uniform Gifts/Transfer to Minors Act

                                      __________________________________
                                                     (State)





                                         A-7
<PAGE>   66
                              [FORM OF ASSIGNMENT]

                 FOR VALUE RECEIVED the undersigned hereby sells, assigns and
transfers unto ______________________________________________________________
_____________________________________________________________________________

                        (Please Print or Typewrite Name
                            and Address of Assignee)

(Insert Social Security or other Identifying Number of Assignee)
__________________________________________________ the within Bond and hereby
irrevocably constitutes and appoints ________________________________________ 
attorney to register the transfer of said Bond on the books kept for 
registration thereof, with full power of substitution in the premises.

Dated: __________________________
Signature: ______________________

SIGNATURE GUARANTEED:


___________________________________________
NOTICE:   Signature guarantee shall be made
          by a guarantor institution
          participating in the Securities
          Transfer Agents Medallion Program
          or in such other guarantee program
          acceptable to the Trustee.



                                         A-8
                                         

<PAGE>   1

                                                                EXHIBIT 4.11


       _________________________________________________________________



                               INDENTURE OF TRUST

                                    Between

                             CITY OF BIG BEAR LAKE

                                      And

                         HARRIS TRUST AND SAVINGS BANK,
                                  as Trustee

                          Dated as of December 1, 1993

                                  Relating to

                                  $50,000,000
                             City of Big Bear Lake
                      Industrial Development Revenue Bonds
                      (Southwest Gas Corporation Project)
                                 1993 Series A


       _________________________________________________________________
<PAGE>   2





                       T A B L E   O F   C O N T E N T S

<TABLE>
<CAPTION>
               Section                                                 Page
               -------                                                 ----
          <S>                                                            <C>
          Parties . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
          Preambles . . . . . . . . . . . . . . . . . . . . . . . . . .   1

                                      ARTICLE I

                                     DEFINITIONS

          1.01.  Definitions  . . . . . . . . . . . . . . . . . . . . .   3
          1.02.  Number and Gender  . . . . . . . . . . . . . . . . . .  13
          1.03.  Articles, Sections, Etc  . . . . . . . . . . . . . . .  13
          1.04.  Content of Certificates and Opinions . . . . . . . . .  13

                                      ARTICLE II

                                      THE BONDS

          2.01.  Authorization and Terms of Bonds . . . . . . . . . . .  14
          2.02.  Execution of Bonds . . . . . . . . . . . . . . . . . .  31
          2.03.  Transfer and Exchange of Bonds . . . . . . . . . . . .  32
          2.04.  Bond Register  . . . . . . . . . . . . . . . . . . . .  32
          2.05.  Temporary Bonds  . . . . . . . . . . . . . . . . . . .  32
          2.06.  Bonds Mutilated, Lost, Destroyed or Stolen . . . . . .  33
          2.07.  Disposition of Cancelled Bonds.  . . . . . . . . . . .  33

                                     ARTICLE III

                                  ISSUANCE OF BONDS

          3.01.  Authentication and Delivery of Bonds . . . . . . . . .  34
          3.02.  Application of Proceeds of Bonds . . . . . . . . . . .  34
          3.03.  Construction Fund  . . . . . . . . . . . . . . . . . .  34

                                      ARTICLE IV

                                 REDEMPTION OF BONDS

          4.01.  Redemption of Bonds  . . . . . . . . . . . . . . . . .  36
          4.02.  Selection of Bonds for Redemption  . . . . . . . . . .  40
          4.03.  Notice of Redemption . . . . . . . . . . . . . . . . .  40
          4.04.  Partial Redemption of Bonds  . . . . . . . . . . . . .  41
          4.05.  Effect of Redemption . . . . . . . . . . . . . . . . .  41

                                      ARTICLE V

                                       REVENUES

          5.01.  Pledge of Revenues . . . . . . . . . . . . . . . . . .  42
          5.02.  Bond Fund  . . . . . . . . . . . . . . . . . . . . . .  42
          5.03.  Trustee Authorized to Take Actions Under the Agreement. 43
          5.04.  Investment of Moneys . . . . . . . . . . . . . . . . .  43
</TABLE>





                                        i
<PAGE>   3





<TABLE>
<CAPTION>
               Section                                                 Page
               -------                                                 ----
          <S>    <C>                                                     <C>
          5.05.  Assignment to Trustee; Enforcement of Obligations  . .  44
          5.06.  Repayment to Borrower  . . . . . . . . . . . . . . . .  45
          5.07.  Credit Facility; Credit Provider Bonds . . . . . . . .  45

                                      ARTICLE VI

                                COVENANTS OF THE CITY

          6.01.  Payment of Principal and Interest  . . . . . . . . . .  48
          6.02.  Extension or Funding of Claims for Interest  . . . . .  48
          6.03.  Paying Agents  . . . . . . . . . . . . . . . . . . . .  48
          6.04.  Preservation of Revenues . . . . . . . . . . . . . . .  49
          6.05.  Compliance with Indenture  . . . . . . . . . . . . . .  49
          6.06.  Arbitrage Covenants  . . . . . . . . . . . . . . . . .  49
          6.07.  Other Liens  . . . . . . . . . . . . . . . . . . . . .  49
          6.08.  Further Assurances . . . . . . . . . . . . . . . . . .  49

                                     ARTICLE VII

                                       DEFAULT

          7.01.  Events of Default; Acceleration; Waiver of Default . .  50
          7.02.  Institution of Legal Proceedings by Trustee  . . . . .  51
          7.03.  Application of Moneys Collected by Trustee . . . . . .  52
          7.04.  Effect of Delay or Omission to Pursue Remedy . . . . .  53
          7.05.  Remedies Cumulative  . . . . . . . . . . . . . . . . .  53
          7.06.  Covenant to Pay Bonds in Event of Default  . . . . . .  53
          7.07.  Trustee Appointed Agent for Bondholders  . . . . . . .  54
          7.08.  Power of Trustee to Control Proceedings  . . . . . . .  54
          7.09.  Limitation on Bondholders' Right to Sue  . . . . . . .  54
          7.10.  Limitation of Liability to Revenues  . . . . . . . . .  55

                                     ARTICLE VIII

                            THE TRUSTEE AND THE REGISTRAR

          8.01.  Duties, Immunities and Liabilities of Trustee
                 and Registrar  . . . . . . . . . . . . . . . . . . . .  55
          8.02.  Right of Trustee and Registrar to Rely
                 upon Documents, Etc  . . . . . . . . . . . . . . . . .  57
          8.03.  Trustee and Registrar Not Responsible for Recitals . .  58
          8.04.  Right of Trustee and Registrar to Acquire Bonds  . . .  58
          8.05.  Moneys Received by Trustee and Registrar to Be
                 Held in Trust  . . . . . . . . . . . . . . . . . . . .  58
          8.06.  Compensation and Indemnification of Trustee
                 and Registrar  . . . . . . . . . . . . . . . . . . . .  59
          8.07.  Qualifications of Trustee and Registrar  . . . . . . .  60
          8.08.  Resignation and Removal of Trustee or Registrar
                 and Appointment of Successor Trustee or Registrar  . .  60
          8.09.  Acceptance of Trust by Successor Trustee . . . . . . .  61
          8.10.  Merger or Consolidation of Trustee or Registrar  . . .  62
</TABLE>





                   





                                     ii
<PAGE>   4





<TABLE>
<CAPTION>
               Section                                                 Page
               -------                                                 ----
          <S>                                                           <C>
          8.11.  Accounting Records and Reports . . . . . . . . . . . .  62
          8.12.  Registrars . . . . . . . . . . . . . . . . . . . . . .  63
          8.13.  Special Bondholder Requests  . . . . . . . . . . . . .  63
          8.14.  Tax Certificate  . . . . . . . . . . . . . . . . . . .  64
          8.15.  Appointment of Separate or Co-Trustee  . . . . . . . .  64

                                      ARTICLE IX

                         MODIFICATION OF INDENTURE, DOCUMENTS

          9.01.  Modification without Consent of Bondholders  . . . . .  66
          9.02.  Modification with Consent of Bondholders . . . . . . .  68
          9.03.  Effect of Supplemental Indenture or Amendment  . . . .  69
          9.04.  Required and Permitted Opinions of Counsel . . . . . .  69
          9.05.  Notation of Modification on Bonds; Preparation
                 of New Bonds . . . . . . . . . . . . . . . . . . . . .  70

                                      ARTICLE X

                                      DEFEASANCE

          10.01.  Discharge of Indenture  . . . . . . . . . . . . . . .  70
          10.02.  Discharge of Liability on Bonds . . . . . . . . . . .  71
          10.03.  Payment of Bonds after Discharge of Indenture . . . .  72
          10.04.  Deposit of Money or Securities with Trustee . . . . .  72

                                      ARTICLE XI

                                    MISCELLANEOUS

          11.01.  Successors of City  . . . . . . . . . . . . . . . . .  73
          11.02.  Limitation of Rights to Parties and Bondholders . . .  73
          11.03.  Waiver of Notice  . . . . . . . . . . . . . . . . . .  74
          11.04.  Separability of Invalid Provisions  . . . . . . . . .  74
          11.05.  Notices . . . . . . . . . . . . . . . . . . . . . . .  74
          11.06.  Evidence of Rights of Bondholders . . . . . . . . . .  75
          11.07.  Waiver of Personal Liability  . . . . . . . . . . . .  77
          11.08.  Publication of Notices  . . . . . . . . . . . . . . .  77
          11.09.  Prevailing Law  . . . . . . . . . . . . . . . . . . .  77
          11.10.  Execution in Several Counterparts . . . . . . . . . .  77
          11.11.  The Credit Provider . . . . . . . . . . . . . . . . .  77


          EXHIBIT A  FORM OF BOND                                       A-1
</TABLE>





                                       iii
<PAGE>   5


                 THIS INDENTURE OF TRUST, made and entered into as of December
1, 1993, by and between the CITY OF BIG BEAR LAKE, a municipal corporation and
charter city duly organized and existing under the laws and Constitution of the
State of California (herein called the "City"), and HARRIS TRUST AND SAVINGS
BANK, a banking corporation organized and existing under the laws of the State
of Illinois, with corporate trust offices in Chicago, Illinois, and being
qualified to accept and administer the trusts hereby created (herein called the
"Trustee"),


                              W I T N E S S E T H:

                 WHEREAS, the City has enacted Ordinance No. 84-106, adopted
May 9, 1984, as amended from time to time (the "Law"), authorizing the City to
issue its revenue bonds to provide funds for the furtherance and accomplishment
of the purposes hereinafter set forth; and

                 WHEREAS, Southwest Gas Corporation, a California corporation
(the "Borrower"), has duly submitted a financing application requesting that
the City issue revenue bonds to finance certain facilities for the local
furnishing of gas as more fully described in Exhibit A to the Project Agreement
(the "Project"); and

                 WHEREAS, the City, after due investigation and deliberation,
has determined that financing the Project is authorized by the Law and has
taken all necessary action approving such application and authorizing the
issuance of its industrial development revenue bonds as provided herein, in an
aggregate principal amount not to exceed $50,000,000 (as more fully defined in
Section 1.01, the "Bonds"), in order to finance the Project; and

                 WHEREAS, the City has duly entered into a project agreement
(the "Agreement") with the Borrower specifying the terms and conditions of the
financing of the Project by the Borrower, the application of the proceeds of
the Bonds for such purpose and the repayment by the Borrower of the loan made
or deemed to be made to the Borrower with the proceeds of the Bonds; and

                 WHEREAS, in order to provide for the authentication and
delivery of the Bonds, to establish and declare the terms and conditions upon
which the Bonds are to be issued and secured and to secure the payment of the
principal thereof and of the interest and premium, if any, thereon, the City
has authorized the execution and delivery of this Indenture; and

                 WHEREAS, the Bonds issued under this Indenture will be secured
by a pledge and assignment to the Trustee of the City's





<PAGE>   6


rights under the Agreement and by certain other security in accordance with the
terms of this Indenture; and

                 WHEREAS, all acts and proceedings required by law necessary to
make the Bonds when executed by the City, authenticated and delivered by the
Trustee and duly issued, the legal, valid and binding special, limited
obligations of the City, and to constitute this Indenture a valid and binding
agreement for the uses and purposes herein set forth, in accordance with its
terms, have been done and taken; and the execution and delivery of this
Indenture have been in all respects duly authorized;

                 NOW, THEREFORE, for and in consideration of these premises and
the mutual covenants herein contained, of the acceptance by the Trustee of the
trusts hereby created, of the purchase and acceptance of the Bonds by the
holders (as hereinafter defined) thereof and for other good and valuable
consideration the receipt and sufficiency of which is hereby acknowledged, in
order to secure the payment of the principal of and premium, if any, and
interest on the Bonds at any time outstanding (as hereinafter defined) under
this Indenture according to their tenor and effect, and the performance and
observance by the City of all the covenants and conditions expressed or implied
herein and contained in the Bonds, the City does hereby grant, bargain, sell,
convey, mortgage, pledge, assign, create and grant a security interest in and
confirm unto the Trustee, its successors in trust and their assigns forever,
the Trust Estate (as hereinafter defined);

                 TO HAVE AND TO HOLD all the same with all privileges and
appurtenances hereby conveyed and assigned or agreed or intended so to be, to
the Trustee, its successors in trust and their assigns forever;

                 IN TRUST NEVERTHELESS, upon the terms and trusts herein set
forth for the equal and proportionate benefit and security of all holders of
the Bonds issued under and secured by this Indenture without preference,
priority or distinction as to lien of any Bonds over any other Bonds;

                 PROVIDED, HOWEVER, that if, after the right, title and
interest of the Trustee in and to the Trust Estate shall have ceased,
terminated and become void in accordance with Article X hereof, and the
principal of and premium, if any, and interest on the Bonds shall have been
paid to the holders thereof or sufficient funds for such payment shall have
been set aside in accordance with Article X hereof, then and in that case these
presents and the estate and rights hereby granted shall cease, terminate and be
void, and thereupon the Trustee shall cancel and discharge this Indenture and
execute and deliver to the City and the Borrower such instruments in writing as
shall be requisite to evidence the discharge hereof; otherwise this Indenture
to be and remain in full force and effect.




 
                                         2
<PAGE>   7



                 THIS INDENTURE OF TRUST FURTHER WITNESSETH, and it is
expressly declared, that all Bonds issued and secured hereunder are to be
issued, authenticated and delivered, and the Trust Estate and the other estate
and rights hereby granted are to be dealt with and disposed of, under, upon and
subject to the terms, conditions, stipulations, covenants, agreements, trusts,
uses and purposes hereinafter expressed, and the City has agreed and
covenanted, and does hereby agree and covenant, with the Trustee and with the
respective holders, from time to time, of the Bonds, as follows:


                                   ARTICLE I

                                  DEFINITIONS

                 Section 1.01.  Definitions.  Unless the context otherwise
requires, the terms defined in this Section 1.01 shall, for all purposes of
this Indenture and of the Agreement and of any indenture supplemental hereto or
agreement supplemental thereto, have the meanings herein specified, as follows:

                 "Act of Bankruptcy" of the Borrower means any of the following
with respect to the Borrower:  (a) the commencement by the Borrower of a
voluntary case under the federal bankruptcy laws, as now in effect or hereafter
amended, or any other applicable federal or state bankruptcy, insolvency or
similar laws, or (b) the filing of a petition with a court having jurisdiction
over the Borrower to commence an involuntary case against the Borrower under
the federal bankruptcy laws, as now in effect or hereafter amended, or any
other applicable federal or state bankruptcy, insolvency or similar laws, or
(c) the Borrower shall admit in writing its inability to pay its debts
generally as they become due, or (d) a receiver, trustee or liquidator of the
Borrower shall be appointed in any proceeding brought against the Borrower, or
(e) assignment by the Borrower for the benefit of its creditors, or (f) the
entry by the Borrower into an agreement of composition with its creditors.

                 "Agreement" means the Project Agreement, of even date
herewith, between the City and the Borrower and relating to the loan of the
proceeds of the Bonds, as originally executed or as it may from time to time be
supplemented or amended.

                 "Authorized Borrower Representative" means any person who at
the time and from time to time may be designated, by written certificate
furnished to the City and the Trustee, as the person authorized to act on
behalf of the Borrower.  Such certificate shall contain the specimen signature
of such person, shall be signed on behalf of the Borrower by any one of its
President and Chief Executive Officer, Senior Vice President and Chief
Financial Officer or Treasurer and shall designate an alternate or alternates.





                                          3
<PAGE>   8


                 "Authorized City Representative" means the City Manager of the
City, the Assistant City Manager of the City or other official of the City
designated by the City Manager or the Assistant City Manager.

                 "Authorized Denomination" means (a) with respect to Bonds
during any Term Rate Period, $5,000 or any integral multiple thereof; (b) with
respect to Bonds during any Daily Rate Period and any Weekly Rate Period,
$100,000 or any integral multiple thereof; and (c) with respect to Bonds during
any Variable Term Rate Period, $100,000 or any integral multiple of $5,000 in
excess of $100,000.

                 "Available Amounts" means (a) funds received by the Trustee
pursuant to any Credit Facility; (b) moneys which have been continuously on
deposit with the Trustee (i) held in any separate and segregated fund, account
or subaccount established hereunder in which no other moneys which are not
Available Amounts are held, and (ii) which have so been on deposit with the
Trustee for at least 370 consecutive days from their receipt by the Trustee and
not commingled with any moneys so held for less than said period and during and
prior to which period no Act of Bankruptcy of the Borrower has occurred; (c)
proceeds from the sale of the Bonds received contemporaneously with the
issuance and sale of such Bonds; (d) any other moneys if there is delivered to
the Trustee at the time such moneys are deposited with the Trustee an opinion
(which may assume that no owner of Bonds is an "insider" within the meaning of
the Bankruptcy Code) of bankruptcy counsel to the effect that the use of such
moneys to pay amounts due on the Bonds would not be recoverable from the
Bondholders pursuant to Section 550 of the Bankruptcy Code as avoidable
preferential payments under Section 547 of the Bankruptcy Code in the event of
the occurrence of an Act of Bankruptcy; (e) proceeds of the investment of funds
qualifying as Available Amounts under the foregoing clauses; or (f) at any time
except when there is a Credit Facility in effect in the form of a letter of
credit, any other moneys from whatever source derived.

                 "Bond Counsel" means any attorney at law or firm of attorneys,
of nationally recognized standing in matters pertaining to the federal tax
exemption of interest on bonds issued by states and political subdivisions, and
duly admitted to practice law before the highest court of any state of the
United States, but shall not include counsel for the Borrower or any Credit
Provider.

                 "Bond Fund" means the City of Big Bear Lake Industrial
Development Revenue Bonds (Southwest Gas Corporation Project) 1993 Series A
Bond Fund established pursuant to Section 5.02 hereof.

                 "Bond Year" means the one-year period commencing on the Issue
Date and ending the day preceding the first anniversary of the Issue Date and
each one-year period commencing on successive





                                          4
<PAGE>   9


anniversaries of the Issue Date, the last of which ends on the date the last of
the Bonds is retired.

                 "Bonds" means the bonds designated as provided in Section
2.01(a), authorized and issued hereunder in an aggregate principal amount not
to exceed $50,000,000.

                 "Borrower" means (i) Southwest Gas Corporation, a corporation
organized under the laws of the State of California, and its successors and
assigns, and (ii) any surviving, resulting or transferee corporation as
provided in Section 5.2 of the Agreement.

                 "Business Day" means a day on which banks located in the
cities in which the Principal Offices of the Trustee, the Registrar, the Paying
Agent, the Tender Agent, the Remarketing Agent and any Credit Provider are
located are not required or authorized to be closed and on which The New York
Stock Exchange is not closed, and, in the case of any action to be taken by the
Borrower, which is not a legal holiday in Las Vegas, Nevada.

                 "Certificate of the City" means a certificate signed by an
Authorized City Representative.  If and to the extent required by the
provisions of Section 1.04 hereof, each Certificate of the City shall include
the statements provided for in Section 1.04 hereof.

                 "Certified Resolution" means a copy of a resolution or
ordinance of the City certified by the City Clerk of the City to have been duly
adopted by the City and to be in full force and effect on the date of such
certification.

                 "City" means the City of Big Bear Lake, California.

                 "Clark County Project" means the facilities financed with
proceeds of the Clark County, Nevada Industrial Development Revenue Bonds
(Southwest Gas Corporation) 1993 Series A issued by Clark County, Nevada for
the benefit of the Borrower.

                 "Code" means the Internal Revenue Code of 1986.

                 "Completion Date" means the date of completion of the Project,
as that date shall be certified as provided in Section 3.4 of the Agreement.

                 "Construction Fund" means the City of Big Bear Lake Industrial
Development Revenue Bonds (Southwest Gas Corporation Project) 1993 Series A
Construction Fund established pursuant to Section 3.03 hereof.

                 "Construction Period" means the period during which interest
for any portion of the Project may be capitalized for federal income tax
purposes.





                                          5
<PAGE>   10


                 "Cost of the Project" means the sum of the items, or any such
item, authorized to be paid from the Construction Fund pursuant to the
provisions of Section 3.3 of the Agreement.

                 "Credit Agreement" means the Letter of Credit and
Reimbursement Agreement, of even date herewith, between the Borrower and the
initial Credit Provider, as originally executed or as it may from time to time
be replaced, supplemented or amended in accordance with the provisions thereof
and Article IX hereof, providing for the issuance of the initial Credit
Facility, and any subsequent agreement pursuant to which a substitute Credit
Facility is provided.

                 "Credit Facility" means any first mortgage bonds of the
Borrower, letter of credit, guarantee, standby purchase agreement, bond
insurance or other support arrangement or security, if any, provided by the
Borrower, pursuant to Section 4.6 of the Agreement and Section 5.07 hereof.

                 "Credit Provider" means Union Bank of Switzerland, acting
through its Los Angeles Branch, as issuer of the Letter of Credit, or any
issuer or other provider of a substitute Credit Facility as permitted under
Section 4.6 of the Agreement and Section 5.07 hereof, and the respective
successors and assigns of the business thereof and any surviving, resulting or
transferee entity with or into which it may be consolidated or merged or to
which it may transfer all or substantially all of its banking business.

                 "Credit Provider Bonds" means any Bonds purchased with a
drawing under a Credit Facility pursuant to Section 5.07(b)(iv) hereof for so
long as such Bonds are registered in the name of the applicable Credit Provider
or its nominee or such other names as the Credit Provider shall direct or are
held by the Tender Agent for the account of the Credit Provider or its nominee.

                 "Daily Rate" means the variable interest rate on any Bonds
established in accordance with Section 2.01(c)(ii) hereof.

                 "Daily Rate Period" means each period during which a Daily
Rate is in effect.

                 "Debt Service" shall have the meaning ascribed to such term by
Section 148(d)(3)(D) of the Code.

                 "Determination of Taxability" means a determination that
interest payable on any Bond is includable in the gross income for federal
income tax purposes of the holder of such Bond (other than a holder who is a
"substantial user" of the Project or the Clark County Project or a "related
person" within the meaning of Section 147(a) of the Code).  Such determination
shall be deemed to have been made upon the date on which, due to the untruth or
inaccuracy of any representation or warranty made by the Borrower in the
Agreement, or in connection with the offer





                                          6
<PAGE>   11


and sale of the Bonds, or the breach of any covenant or warranty of the
Borrower contained in the Agreement, interest on the Bonds, or any of them, is
determined to be includable in the gross income for federal income tax purposes
of the owners thereof (other than an owner who is a "substantial user" of the
Project or the Clark County Project or a "related person" within the meaning of
Section 147(a) of the Code) by a final administrative determination of the
Internal Revenue Service or judicial decision of a court of competent
jurisdiction in a proceeding of which the Borrower received notice and was
afforded an opportunity to participate to the full extent permitted by law.  A
determination or decision will not be considered final for purposes of the
preceding sentence unless (A) the holder or holders of the Bonds involved in
the proceeding in which the issue is raised (i) shall have given the Borrower
and the Trustee prompt notice of the commencement thereof, and (ii) shall have
offered the Borrower the opportunity to control the proceeding to the extent
that the Borrower is permitted by law to do so; provided the Borrower agrees to
pay all expenses in connection therewith and to indemnify such holder or
holders against all liability for such expenses (except that any such holder
may engage separate counsel, and the Borrower shall not be liable for the fees
or expenses of such counsel); and (B) such proceeding shall not be subject to a
further right of appeal or shall not have been timely appealed.

                 "DTC" means The Depository Trust Company and its successors
and assigns.

                 "DTC Participants" means those broker-dealers, banks and other
financial institutions from time to time for which DTC holds Bonds as
securities depository.

                 "Event of Default" as used with respect to this Indenture has
the meaning specified in Section 7.01 hereof, and as used with respect to the
Agreement has the meaning specified in Section 6.1 thereof.

                 "Government Obligations" means bonds, notes, certificates of
indebtedness, treasury bills or other securities constituting direct
obligations of, or obligations the full and timely payment of which is
guaranteed by, the United States of America, or securities evidencing ownership
interests in such obligations or in specified portions thereof (which may
consist of specific portions of the principal of or interest on such
obligations).

                 The term "holder" or "Bondholder" means the registered owner
of any Bond; provided that, at any time the Bonds are held in book-entry only
form as provided in Section 2.01(h) hereof, such terms shall also mean any
beneficial owner of Bonds for purposes of tendering Bonds for purchase pursuant
to Section 2.01(d), but not for purposes of receiving payment thereon or
notices with respect thereto.





                                          7
<PAGE>   12



                 "Indenture" means this Indenture of Trust, as originally
executed or as it may from time to time be supplemented, modified or amended by
any supplemental indenture entered into pursuant to the provisions hereof.

                 "Information Services" means Financial Information, Inc.'s
"Daily Called Bond Service," 30 Montgomery Street, 10th Floor, Jersey City, New
Jersey 07302, Attention:  Editor; Kenny Information Services' "Called Bond
Service," 65 Broadway, 16th Floor, New York, New York 10006; Moody's "Municipal
and Government," 99 Church Street, 8th Floor, New York, New York 10007,
Attention:  Municipal News Reports; the Municipal Securities Rulemaking Board,
CDI Pilot, 1640 King Street, Suite 300, Alexandria, Virginia 22314; and
Standard and Poor's "Called Bond Record," 25 Broadway, 3rd Floor, New York, New
York 10004; or, in accordance with then-current guidelines of the Securities
and Exchange Commission, such other addresses and/or such other services
providing information with respect to called bonds, or no such services, as the
City may designate in a Certificate of the City delivered to the Trustee.

                 "Initial Rate Period" for the Bonds means the applicable Rate
Period for the Bonds on the Issue Date as specified in Section 2.01(c)(i)
hereof.

                 "Interest Payment Date" means (i) with respect to any Daily or
Weekly Rate Period, the first Business Day of each calendar month, (ii) with
respect to any Term Rate Period, the first day of the sixth month following the
commencement of the Term Rate Period and the first day of each sixth month
period thereafter, (iii) with respect to any Variable Term Segment, the
Business Day next succeeding the last day of such Variable Term Segment, and
(iv) with respect to any Rate Period the Business Day next succeeding the last
day thereof.

                 "Investment Securities" means any securities or other
evidences of indebtedness or demand deposits which are lawful investments for
trust funds similar to those created hereby in the State of California, a
schedule of which shall be provided by the Borrower to the Trustee from time to
time.

                 "Issue Date" means December 15, 1993, the date of issuance and
delivery of the Bonds.

                 "Law" means Ordinance No. 84-106 of the City, adopted May 9,
1984, as amended and supplemented.

                 "Letter of Credit" means the irrevocable direct-pay letter of
credit provided by Union Bank of Switzerland, acting through its Los Angeles
Branch, as the initial Credit Facility pursuant to Sections 4.2 and 4.6 of the
Agreement.

                 "Maximum Interest Rate" means (a) while a Credit Facility is
in effect, the rate of interest specified in the





                                          8
<PAGE>   13



Credit Facility which is used to determine the amount available under such
Credit Facility for payment of interest due and payable to holders of Bonds
(which, in the case of the Letter of Credit, is 14% per annum) and (b) at all
other times, with respect to Bonds in a Daily Rate Period, 14% per annum, with
respect to Bonds in a Weekly Rate Period, 14% per annum, with respect to Bonds
in a Term Rate Period, 14% per annum, and with respect to Bonds in a Variable
Term Rate Period, 14% per annum.

                 "Notice by Mail" or "notice" of any action or condition "by
Mail" shall mean a written notice meeting the requirements of this Indenture
mailed by first-class mail to the holders of specified Bonds, at the addresses
shown on the registration books maintained pursuant to Section 2.04 hereof.

                 "Opinion of Counsel" means a written opinion of counsel (who
may not be counsel for the Borrower) acceptable to the Trustee and the
Borrower.  If and to the extent required by the provisions of Section 1.04,
each Opinion of Counsel shall include the statements provided for in Section
1.04.

                 The term "outstanding," when used as of any particular time
with reference to Bonds (subject to the provisions of Section 11.06(e)), means
all Bonds theretofore authenticated and delivered by the Registrar under this
Indenture except:

                 (a)      Bonds theretofore cancelled by the Registrar or
         surrendered to the Registrar for cancellation;

                 (b)      Bonds in lieu of or in substitution for which other
         Bonds shall have been authenticated and delivered by the Registrar
         pursuant to the terms of Section 2.06; and

                 (c)      Bonds with respect to which the liability of the City
         and the Borrower have been discharged to the extent provided in, and
         pursuant to the requirements of, Section 10.02.

                 "Paying Agent" means any paying agent appointed as provided in
Section 6.03 hereof, or any successor thereto.

                 The term "person" means an individual, a corporation, a
partnership, a trust, an unincorporated organization or a government or any
agency or political subdivision thereof.

                 "Principal Office" (i) of the Registrar or the Paying Agent
means the office thereof designated in writing by the Registrar or the Paying
Agent, as the case may be, to the City, the Trustee, the Credit Provider and
the Borrower, which as to both initially shall be the Principal Office of the
Trustee; (ii) of the Trustee means the principal corporate trust office of the
Trustee initially located in Los Angeles, California; (iii) of the Remarketing
Agent means the office thereof designated in writing to the City, the Trustee,
the Credit





                                          9
<PAGE>   14


Provider and the Borrower; (iv) of the Tender Agent means the principal
corporate trust office of the Tender Agent designated in writing to the City,
the Trustee, the Credit Provider and the Borrower; and (v) of the Credit
Provider means its office located at such address as such Credit Provider shall
designate in writing to the City, the Trustee and the Borrower.

                 "Project" means those facilities, including real property,
structures, buildings, fixtures or equipment, described in Exhibit A to the
Agreement, which facilities are financed, in whole or in part, from the
proceeds of the sale of the Bonds, and any real property, structures,
buildings, fixtures or equipment acquired in substitution for, as a renewal or
replacement of, or a modification or improvement to, all or any part of the
facilities described in said Exhibit A.

                 "Purchase Date" means any date on which any Bond is required
to be purchased pursuant to Section 2.01(d) or (e) hereof.

                 "Qualified Newspaper" shall include The Wall Street Journal or
The Bond Buyer or any other newspaper or journal containing financial news,
printed in the English language and customarily published on each business day,
of general circulation in New York, New York, and selected by the Borrower with
the approval of the Trustee.

                 "Rate Period" means any Daily Rate Period, Weekly Rate Period,
Variable Term Rate Period or Term Rate Period.

                 "Rating Agency" means Moody's Investors Service and Standard &
Poor's Ratings Group, or in the event that Moody's Investors Service or
Standard & Poor's Ratings Group no longer maintains a rating on the Bonds, any
other nationally recognized rating agency then maintaining a rating on the
Bonds.

                 "Rebate Fund" means the Rebate Fund established and maintained
pursuant to Section 5.08 of the Indenture of Trust, dated as of December 1,
1993, by and between Clark County, Nevada and Harris Trust and Savings Bank, or
its successors and assigns as trustee for the Clark County Bonds.

                 "Record Date" means (a) with respect to any Interest Payment
Date in respect of any Daily Rate Period, Weekly Rate Period or Variable Term
Segment, the Business Day next preceding such Interest Payment Date; and (b)
with respect to any Interest Payment Date in respect of any Term Rate Period,
the fifteenth day of the month preceding such Interest Payment Date.

                 "Registrar" means any registrar appointed as provided in
Section 8.12 hereof, or any successor thereto.

                 "Reimbursement Rate" means the per annum interest rate
specified in the applicable Credit Agreement as the rate of





                                          10
<PAGE>   15


interest then in effect with respect to, and to be borne by, any reimbursement
obligation of the Borrower thereunder to the Credit Provider.

                 "Remarketing Agent" means the Remarketing Agent for the Bonds
selected by the Borrower pursuant to Section 5.8(c) of the Agreement.

                 "Remarketing Agreement" means any agreement which meets the
requirements of Section 5.8(d) of the Agreement.

                 "Repayment Installment" means any amount that the Borrower is
required to pay directly to the Trustee pursuant to Section 4.2(a) of the
Agreement as a repayment of the loan made by the City under the Agreement,
which amount is determined in accordance with Section 4.2(a) thereof.

                 "Responsible Officer" of the Trustee means and includes the
chairman of the board of directors, the president, every vice president and
every assistant vice president.

                 "Revenues" means all rents, receipts, installment payments and
other income derived by the City or the Trustee under the Agreement, any Credit
Facility, or otherwise in respect of the financing of the Project as
contemplated by the Agreement, and any income or revenue derived from the
investment of any money in any fund or account established pursuant to this
Indenture, including all Repayment Installments and any other payments made by
the Borrower pursuant to the Agreement; but such term shall not include
payments to the City or the Trustee pursuant to Sections 4.2(b), 4.2(c), 5.6,
6.3, 8.2 and 8.3 of the Agreement.

                 "Securities Depositories" means The Depository Trust Company,
711 Stewart Avenue, Garden City, New York 11530, Fax-(516) 227-4039 or 4190;
Midwest Securities Trust Company, Capital Structures-Call Notification, 440
South LaSalle Street, Chicago, Illinois 60605, Fax-(312) 663-2343; Philadelphia
Depository Trust Company, Reorganization Division, 1900 Market Street,
Philadelphia, Pennsylvania 19103, Attention: Bond Department, Fax-(215)
496-5058; or, in accordance with then-current guidelines of the Securities and
Exchange Commission, such other addresses and/or such other securities
depositories, or no such depositories, as the City may designate in a
Certificate of the City delivered to the Trustee.

                 The term "supplemental indenture" or "indenture supplemental
hereto" means any indenture hereafter duly authorized and entered into between
the City and the Trustee in accordance with the provisions of this Indenture.

                 "Tax Certificate" means the Tax Certificate and Agreement,
dated as of the Issue Date, by and between the City and the Borrower, as the
same may be amended from time to time.





                                          11
<PAGE>   16



                 "Tax-Exempt" means, with respect to interest on any
obligations of a state or local government, including the Bonds, that such
interest is excluded from gross income for federal income tax purposes, whether
or not such interest is includable as an item of tax preference or otherwise
includable directly or indirectly for purposes of calculating other tax
liabilities, including any alternative minimum tax or environmental tax under
the Code.

                 "Tender Agent" means the tender agent for the Bonds selected
by the Borrower and meeting the requirements of Section 5.8(b) of the
Agreement.

                 "Tender Agreement" means any agreement that meets the
requirements of Section 5.8(b) of the Agreement.

                 "Term Rate" means a non-variable interest rate on the Bonds
established in accordance with Section 2.01(c)(iv) hereof.

                 "Term Rate Period" means each period during which a Term Rate
is in effect.

                 "Trust Estate" means (i) the proceeds of the Bonds; (ii) all
Revenues; (iii) all amounts (including money and securities) held in any funds
or accounts hereunder; (iv) the Agreement and the rights and privileges of the
City thereunder which are assigned to the Trustee pursuant to Section 5.05
hereof; and (v) any other property rights, money, securities or other assets
pledged or assigned by the City to the Trustee pursuant hereto.

                 "Trustee" means Harris Trust and Savings Bank, a state banking
corporation organized and existing under the laws of the State of Illinois, or
any successor trustee appointed pursuant to Section 8.08 hereof.

                 "Variable Term Rate" means, with respect to any Bond, the
non-variable rate associated with such Bond established in accordance with
Section 2.01(c)(v) hereof.

                 "Variable Term Rate Period" means each period comprised of
Variable Term Segments during which Variable Term Rates are in effect.

                 "Variable Term Segment" means, with respect to each Bond
bearing interest at a Variable Term Rate, the period established in accordance
with Section 2.01(c)(v) hereof.

                 "Weekly Rate" means the variable interest rate on the Bonds
established in accordance with Section 2.01(c)(iii) hereof.

                 "Weekly Rate Period" means each period during which a Weekly
Rate is in effect.





                                          12
<PAGE>   17


                 "Written Consent of the City," "Written Order of the City,"
"Written Request of the City" and "Written Requisition of the City" mean,
respectively, a written consent, order, request or requisition signed by or on
behalf of the City by an Authorized City Representative.

                 "Yield" shall have the meaning ascribed to such term by
Section 148(h) of the Code.

                 Section 1.02.  Number and Gender.  The singular form of any
word used herein, including the terms defined in Section 1.01, shall include
the plural, and vice versa.  The use herein of a word of any gender shall
include all genders.

                 Section 1.03.  Articles, Sections, Etc.  All references herein
to "Articles," "Sections" and other subdivisions are to the corresponding
Articles, Sections or subdivisions of this Indenture as originally executed;
and the words "herein," "hereof," "hereunder" and other words of similar import
refer to this Indenture as a whole and not to any particular Article, Section
or subdivision hereof.  The headings or titles of the several Articles and
Sections hereof, and any table of contents appended to copies hereof, shall be
solely for convenience of reference and shall not affect the meaning,
construction or effect of this Indenture.

                 Section 1.04.  Content of Certificates and Opinions.  Every
certificate or opinion with respect to compliance with a condition or covenant
provided for in this Indenture or the Agreement (except for the certificate of
destroyed Bonds provided for herein) shall include (a) a statement that the
person or persons making or giving such certificate or opinion have read such
covenant or condition and the definitions herein relating thereto; (b) a brief
statement as to the nature and scope of the examination or investigation upon
which the statements or opinions contained in such certificate or opinion are
based; (c) a statement that, in the opinion of the signers, they have made or
caused to be made such examination or investigation as is necessary to enable
them to express an informed opinion as to whether or not such covenant or
condition has been complied with; and (d) a statement as to whether, in the
opinion of the signers, such condition or covenant has been complied with.

                 Any such certificate or opinion made or given by an officer of
the City or the Borrower may be based, insofar as it relates to legal matters,
upon a certificate or opinion of or representations by counsel, unless such
officer knows that the certificate or opinion or representations with respect
to the matters upon which his certificate or opinion may be based as aforesaid
are erroneous, or in the exercise of reasonable care should have known that the
same were erroneous.  Any such certificate or opinion made or given by counsel
may be based, insofar as it relates to factual matters (with respect to which
information is in the possession of the City or the Borrower),





                                           13
<PAGE>   18


upon the certificate or opinion of or representations by an officer of the City
or the Borrower, as applicable, unless such counsel knows that the certificate
or opinion or representations with respect to the matters upon which his
opinion may be based as aforesaid are erroneous, or in the exercise of
reasonable care should have known that the same were erroneous.


                                   ARTICLE II

                                   THE BONDS

                 Section 2.01.  Authorization and Terms of Bonds.

                 (a)      Authorization.  Bonds designated as "City of Big Bear
Lake Industrial Development Revenue Bonds (Southwest Gas Corporation Project)
1993 Series A" may be issued under this Indenture.  The aggregate principal
amount of Bonds which may be issued and outstanding under this Indenture shall
not exceed fifty million dollars ($50,000,000), exclusive of Bonds executed and
authenticated as provided in Section 2.06.

                 (b)      General Terms.  The Bonds shall be issued as fully
registered Bonds, without coupons, in Authorized Denominations and shall all be
dated as of the Issue Date.  The Bonds shall mature, subject to prior
redemption as provided in Article IV, upon the terms and conditions hereinafter
set forth, on December 1, 2028.  The Bonds shall bear interest at the rate
determined as provided in subsection (c) of this Section 2.01; provided that
any overdue principal and, to the extent permitted by law, any overdue interest
shall bear interest at the rate of 1.00% per annum over the rate otherwise
borne by the Bonds.

                 The Bonds shall be numbered consecutively from 1 upward.  Each
Bond shall bear interest from the Interest Payment Date next preceding the date
of registration and authentication thereof unless it is registered and
authenticated after a Record Date and on or prior to the related Interest
Payment Date, in which event it shall bear interest from such Interest Payment
Date, or unless it is registered and authenticated before the Record Date for
the first Interest Payment Date, in which event they shall bear interest from
the Issue Date; provided, however, that if, as shown by the records of the
Paying Agent, interest on the Bonds shall be in default, Bonds issued in
exchange for Bonds surrendered for registration of transfer or exchange shall
bear interest from the last date to which interest has been paid in full or
duly provided for on the Bonds, or, if no interest has been paid or duly
provided for on the Bonds, from the Issue Date.  Payment of the interest on any
Bond shall be made to the person appearing on the bond registration books of
the Registrar as the registered holder thereof on the Record Date, such
interest to be paid by the Paying Agent to such registered holder (i) by bank
check or draft mailed by first class mail on the Interest Payment Date, to such
holder's address as it appears on the registration





                                          14
<PAGE>   19


books of the Registrar or at such other address as has been furnished to the
Registrar in writing by such holder, or (ii) during any Rate Period other than
a Term Rate Period in immediately available funds (by wire transfer or by
deposit to the account of the holder of any such Bond if such account is
maintained with the Paying Agent), but in respect of any holder of Bonds in a
Daily Rate Period or a Weekly Rate Period only to any holder which owns Bonds
in an aggregate principal amount of at least $1,000,000 on the Record Date,
according to the instructions given by such holder to the Registrar or, if no
such instructions have been provided as of the Record Date, by check or draft
mailed by first class mail to the holder at such holder's address as it appears
as of the Record Date on the registration books of the Registrar; except, in
each case, that, if and to the extent that there shall be a default in the
payment of the interest due on such Interest Payment Date, such defaulted
interest shall be paid to the holders in whose name any such Bonds are
registered as of a special record date to be fixed by the Trustee, notice of
which shall be given to such owners not less than ten (10) days prior thereto.
Both the principal of and premium, if any, on the Bonds shall be payable upon
surrender thereof in lawful money of the United States of America at the
Principal Office of the Paying Agent.  Notwithstanding the foregoing, interest
on any Bond bearing a Variable Term Rate shall be paid only upon presentation
to the Tender Agent of the Bond on which such payment is due.

                 (c)      Interest Rates and Rate Periods.  The Bonds shall
bear interest until final payment of the principal or redemption price thereof
shall have been made or provided for in accordance with the provisions hereof,
whether at maturity, upon redemption or otherwise.  During any Rate Period
other than a Term Rate Period interest on the Bonds shall be computed upon the
basis of a 365- or 366-day year, as applicable, for the number of days actually
elapsed.  During any Term Rate Period interest on the Bonds shall be computed
upon the basis of a 360-day year, consisting of twelve 30-day months.  The
Bonds shall bear interest for the periods and at the rates set forth in this
subsection (c); provided, however, that any Credit Provider Bonds shall bear
interest at the Reimbursement Rate.  Notwithstanding any other provision of
this Indenture, it shall not be required that all Bonds bear interest at the
same rate, provided that, except as provided in Section 2.01(c)(v)(D) hereof,
no more than one Rate Period may apply to the Bonds.  The Trustee shall provide
the Borrower with notice of the interest rate or rates as provided in Section 8
of the Tender Agreement.

                          (i)     Rate Periods; Initial Rate Period.  The term
of the Bonds shall be divided into consecutive Rate Periods during which such
Bonds shall bear interest at the Daily Rate, Weekly Rate, Variable Term Rate(s)
or Term Rate; provided, however, that, to the extent determined in accordance
with Section 2.01(c)(v)(D)(2) hereof, a portion of the Bonds may bear interest
at a Daily Rate, a Weekly Rate or a Term Rate while





                                          15
<PAGE>   20


other Bonds continue to bear interest at Variable Term Rates.  The Initial Rate
Period for the Bonds shall be a Weekly Rate Period and during such Initial Rate
Period the Bonds shall bear interest at Weekly Rates determined as provided in
Section 2.01(c)(iii).  The Rate Period with respect to the Bonds shall be as
provided above until adjusted as provided herein.

                     (ii)         Daily Rate.

                          (A)     Determination of Daily Rate.  During each
Daily Rate Period, the Bonds shall bear interest at the Daily Rate, determined
by the Remarketing Agent either on each Business Day for such Business Day or
on the next preceding Business Day for the Business Day next succeeding such
date of determination and as may be determined by the Remarketing Agent for any
date that is not a Business Day on any such day during which there shall be
active trading in Tax-Exempt obligations comparable to the Bonds for such day.
The Daily Rate shall be the lowest rate determined by the Remarketing Agent
(based on the examination of Tax-Exempt obligations comparable to the Bonds
known by the Remarketing Agent to have been priced or traded under then
prevailing market conditions) to be the rate which would enable the Remarketing
Agent to sell the Bonds on the effective date of such rate at a price (without
regard to accrued interest) equal to 100% of the principal amount thereof.  If
the Remarketing Agent shall not have determined a Daily Rate for any day, the
Daily Rate shall be the same as the Daily Rate for the immediately preceding
day.  In no event shall the Daily Rate be greater than the Maximum Interest
Rate.

                          (B)     Adjustment to Daily Rate.  At any time
(subject to the provisions of (1)(b) of this paragraph), the Borrower, by
written notice to the City, the Trustee, the Paying Agent and the Remarketing
Agent, may elect that the Bonds shall bear interest at a Daily Rate.  Such
notice (1) shall specify the effective date of such adjustment to a Daily Rate,
which shall be (a) a Business Day not earlier than the twelfth day (the
fifteenth day if the then current Rate Period shall be a Term Rate Period or if
the Bonds are then held in book-entry form as provided in Section 2.01(h))
following the fifth Business Day after the date of receipt by the Trustee of
such notice (or such shorter period after the date of such receipt as shall be
acceptable to the Trustee); (b) in the case of an adjustment from a Term Rate
Period, a day on which the Bonds would be permitted to be redeemed at the
option of the Borrower pursuant to Section 4.01(a)(2)(C) hereof or the day
immediately following the last day of the then current Term Rate Period; and
(c) in the case of an adjustment from a Variable Term Rate Period, either (i)
the day immediately following the last day of the then current Variable Term
Rate Period as determined in accordance with Section 2.01(c)(v)(D)(1) hereof,
or (ii) for each Bond, the day immediately following the last day of the last
Variable Term Segment for such Bond in the then current Variable Term Rate
Period as determined in accordance with Section 2.01(c)(v)(D)(2)





                                          16
<PAGE>   21


hereof; and (2) if the adjustment is from a Term Rate Period, shall be
accompanied by an opinion of Bond Counsel addressed to the City to the effect
that such adjustment (a) is authorized or permitted by the Indenture and the
Law, and (b) will not adversely affect the Tax-Exempt status of the interest on
the Bonds.

                          (C)     Notice of Adjustment to Daily Rate.  The
Trustee shall give Notice by Mail of an adjustment to a Daily Rate Period to
the holders of the affected Bonds not less than 12 days (15 days if the then
current Rate Period shall be a Term Rate Period or if such Bonds are then held
in book-entry form as provided in Section 2.01(h)) prior to the effective date
of such Daily Rate Period.  Such notice shall state (1) that the interest rate
on the Bonds will be adjusted to a Daily Rate, (2) the effective date of the
Daily Rate Period, (3) that the Bonds are subject to mandatory tender for
purchase on such effective date, (4) the procedures for such mandatory tender
and (5) that the holders of the Bonds do not have the right to retain their
Bonds on such effective date.

                    (iii)         Weekly Rate.

                          (A)     Determination of Weekly Rate.  During each
Weekly Rate Period, the Bonds shall bear interest at the Weekly Rate,
determined by the Remarketing Agent no later than the first day of such Weekly
Rate Period and thereafter no later than Tuesday of each week during such
Weekly Rate Period, unless any such Tuesday shall not be a Business Day, in
which event the Weekly Rate shall be determined by the Remarketing Agent no
later than the Business Day next succeeding such Tuesday.  The Weekly Rate
shall be the rate determined by the Remarketing Agent (based on the examination
of Tax-Exempt obligations comparable to the Bonds known by such Remarketing
Agent to have been priced or traded under then prevailing market conditions) to
be the lowest rate which would enable the Remarketing Agent to sell the Bonds
on the effective date of such rate at a price (without regarding accrued
interest) equal to 100% of the principal amount thereof.  If the Remarketing
Agent shall not have determined a Weekly Rate for any period, the Weekly Rate
shall be the same as the Weekly Rate in effect for the immediately preceding
Weekly Rate Period.  In no event shall any Weekly Rate be greater than the
Maximum Interest Rate.  The first Weekly Rate determined for each Weekly Rate
Period shall apply to the period commencing on the first day of such Rate
Period and ending on the next succeeding Tuesday.  Thereafter, each Weekly Rate
shall apply to the period commencing on each Wednesday and ending on the next
succeeding Tuesday, unless such Weekly Rate Period shall end on a day other
than Tuesday, in which event the last Weekly Rate for such Weekly Rate Period
shall apply to the period commencing on the Wednesday preceding the last day of
such Weekly Rate Period and ending on such last day.





                                          17
<PAGE>   22


                          (B)     Adjustment to Weekly Rate.  The Borrower, by
written notice to the City, the Trustee, the Paying Agent and the Remarketing
Agent, may at any time (subject to the provisions of (1)(b) of this paragraph)
elect that the Bonds shall bear interest at a Weekly Rate.  Such notice (1)
shall specify the effective date of such adjustment to a Weekly Rate, which
shall be (a) a Business Day not earlier than the twelfth day (the fifteenth day
if the then current Rate Period shall be a Term Rate Period or if the Bonds are
then held in book-entry form as provided in Section 2.01(h)) following the
fifth Business Day after the date of receipt by the Trustee of such notice (or
such shorter period after the date of such receipt as shall be acceptable to
the Trustee); (b) in the case of an adjustment from a Term Rate Period, a day
on which the Bonds would be permitted to be redeemed at the option of the
Borrower pursuant to Section 4.01(a)(2)(C) hereof or the day immediately
following the last day of the then current Term Rate Period; and (c) in the
case of an adjustment from a Variable Term Rate Period either (i) the day
immediately following the last day of the then current Variable Term Rate
Period as determined in accordance with Section 2.01(c)(v)(D)(1) hereof, or
(ii) for each Bond, the day immediately following the last day of the last
Variable Term Segment for such Bond in the then current Variable Term Rate
Period as determined in accordance with Section 2.01(c)(v)(D)(2) hereof; and
(2) if the adjustment is from a Term Rate Period shall be accompanied by an
opinion of Bond Counsel addressed to the City to the effect that such
adjustment (a) is authorized or permitted by the Indenture and the Law, and (b)
will not adversely affect the Tax-Exempt status of interest on the Bonds.

                          (C)     Notice of Adjustment to Weekly Rate.  The
Trustee shall give Notice by Mail of an adjustment to a Weekly Rate Period to
the holders of the affected Bonds not less than 12 days (15 days if the then
current Rate Period shall be a Term Rate Period or if such Bonds are then held
in book-entry form as provided in Section 2.01(h)) prior to the effective date
of such Weekly Rate Period.  Such notice shall state (1) that the interest rate
on the Bonds will be adjusted to a Weekly Rate, (2) the effective date of such
Weekly Rate Period, (3) that the Bonds are subject to mandatory tender for
purchase on such effective date, and (4) the procedures for such mandatory
tender, and (5) that the holders of the Bonds do not have the right to retain
their Bonds on such effective date.

                     (iv)         Term Rate.

                          (A)     Determination of Term Rate.  During each Term
Rate Period the Bonds shall bear interest at the Term Rate, which shall be
determined by the Remarketing Agent on a Business Day selected by the
Remarketing Agent, but not more than 40 days prior to and not later than the
effective date of such Term Rate Period.  The Term Rate shall be the rate
determined by the Remarketing Agent on such date, and communicated on such date
to the Trustee, the Paying Agent and the Borrower, by written notice





                                          18
<PAGE>   23


or by telephone promptly confirmed by telecopy or other writing, as being the
lowest rate (based on the examination of Tax-Exempt obligations comparable to
the Bonds known by the Remarketing Agent to have been priced or traded under
then prevailing market conditions) which would enable the Remarketing Agent to
sell the Bonds on the effective date of such Term Rate Period at a price
(without regard to accrued interest) equal to 100% of the principal amount
thereof; provided, however, that if, for any reason, a Term Rate for any Term
Rate Period shall not be determined or effective or if an adjustment from a
Term Rate Period to another Rate Period shall not be effective, the Rate Period
for the Bonds shall automatically convert to a Daily Rate Period.  No opinion
of Bond Counsel shall be required in connection with the automatic adjustment
to the Daily Rate pursuant to this paragraph.  If a Daily Rate for the first
day of such Daily Rate Period is not determined as provided in Section
2.01(c)(ii) hereof, the Daily Rate for the first day of such Daily Rate Period
shall be eighty percent (80%) of the most recent One-Year Note Index
theretofore published in The Bond Buyer.  In no event shall any Term Rate be
greater than the Maximum Interest Rate.

                          (B)     Adjustment to or Continuation of Term Rate.
At any time (subject to the provisions of (2) of this paragraph), the Borrower,
by written notice to the City, the Trustee, the Paying Agent and the
Remarketing Agent, may elect that the Bonds shall bear, or continue to bear,
interest at a Term Rate, and if it shall so elect, shall determine the duration
of the Term Rate Period during which the Bonds shall bear interest at such Term
Rate.  At the time the Borrower so elects an adjustment to or continuation of a
Term Rate Period, the Borrower may specify two or more consecutive Term Rate
Periods and, if the Borrower so specifies, shall specify the duration of each
such Term Rate Period as provided in this paragraph (B).  Such notice shall
specify the effective date of each Term Rate Period, which shall be (1) a
Business Day not earlier than the twelfth day (the fifteenth day if the then
current Rate Period shall be a Term Rate Period or if the Bonds are then held
in book-entry form as provided in Section 2.01(h)) following the fifth Business
Day after the date of receipt by the Trustee of such notice (or such shorter
period after the date of such receipt as shall be acceptable to the Trustee);
(2) in the case of an adjustment from a Term Rate Period, a day on which the
Bonds would be permitted to be redeemed at the option of the Borrower pursuant
to Section 4.01(a)(2)(C) hereof or the day immediately following the last day
of the then current Term Rate Period; and (3) in the case of an adjustment from
a Variable Term Rate Period either (i) the day immediately following the last
day of the then current Variable Term Rate Period as determined in accordance
with Section 2.01(c)(v)(D)(1) hereof, or (ii) for each Bond, the day
immediately following the last day of the last Variable Term Segment for such
Bond in the then current Variable Term Rate Period as determined in accordance
with Section 2.01(c)(v)(D)(2) hereof; provided, however, that if prior to the
Borrower's making





                                          19
<PAGE>   24


such election, any Bonds shall have been called for redemption and such
redemption shall not have theretofore been effected, the effective date of such
Term Rate Period shall not precede such redemption date.  In addition, such
notice (i) shall specify the last day of such Term Rate Period (which shall be
either the day preceding the date of final maturity of the Bonds or a day which
both immediately precedes a Business Day and is at least one year after such
effective date), and (ii) unless such Term Rate Period immediately succeeds a
Term Rate Period of the same duration and is subject to the same optional
redemption rights under Section 4.01(a)(2)(C) hereof, shall be accompanied by
an opinion of Bond Counsel addressed to the City to the effect that such
adjustment (a) is authorized or permitted by the Indenture and the Law, and (b)
will not adversely affect the Tax-Exempt status of interest on the Bonds.

                 If, by the date required to give notice to Bondholders
pursuant to paragraph (C) below, the Trustee shall not have received notice of
the Borrower's election that the Bonds shall bear interest at a Daily Rate, a
Weekly Rate, a Term Rate or a Variable Term Rate accompanied by appropriate
opinions of Bond Counsel, the next succeeding Rate Period shall be a Daily Rate
Period.  No opinion of Bond Counsel shall be required in connection with the
automatic adjustment to a Daily Rate pursuant to this paragraph.  If a Daily
Rate for the first day of such Daily Rate Period is not determined as provided
in Section 2.01(c)(ii) hereof, the Daily Rate for the first day of such Daily
Rate Period shall be eighty percent (80%) of the most recent One-Year Note
Index theretofore published in The Bond Buyer.

                 At the same time that the Borrower elects to have the Bonds
bear interest at a Term Rate or to continue to bear interest at a Term Rate,
the Borrower may also elect that such Term Rate Period shall be automatically
renewed for successive Term Rate Periods each having the same duration as the
Term Rate Period so specified; provided, however, that if the last day of any
such successive Term Rate Period shall not be a day immediately preceding a
Business Day, then such successive Term Rate Period shall end on the first day
immediately preceding the Business Day next succeeding such day, or if such
last day would be after the day prior to the final maturity date of the Bonds,
such Term Rate Period shall end on the day prior to such maturity date; and
provided, further, that such election must be accompanied by an opinion of Bond
Counsel addressed to the City to the effect that such continuing automatic
renewals of such Term Rate Period (1) are authorized or permitted by the
Indenture and the Law, and (2) will not adversely affect the Tax-Exempt status
of interest on the Bonds.  If such election is made, no opinion of Bond Counsel
shall be required in connection with the commencement of each successive Term
Rate Period determined in accordance with such election.  Further, at the same
time that the Borrower elects to have the Bonds bear interest at a Term Rate or
continue to bear interest at a Term Rate, subject to the





                                          20
<PAGE>   25


provisions of Section 4.01(a)(4) hereof, the Borrower may also specify to the
Trustee optional redemption prices and periods different (including that there
be no such optional redemption) from those set out in Section 4.01(a) during
the Term Rate Period(s) with respect to which such election is made.

                          (C)     Notice of Adjustment to or Continuation of
Term Rate.  The Trustee shall give Notice by Mail of an adjustment to or
continuation of a Term Rate Period to the holders of the affected Bonds not
less than 12 days (15 days if the then current Rate Period is a Term Rate
Period or if such Bonds are then held in book-entry form as provided in Section
2.01(h)) prior to the effective date of such Term Rate Period.  In the event
such adjustment or continuation is from a Term Rate Period to a Term Rate
Period of equal duration, such notice shall state (1) that the interest rate on
the Bonds will be adjusted to, or continue to be, a Term Rate, (2) the
effective date and the last date of the Term Rate Period, (3) that the Term
Rate for such Term Rate Period will be determined not later than the effective
date thereof, (4) how such Term Rate may be obtained from the Remarketing
Agent, (5) the Interest Payment Dates after such effective date, (6) that,
during such Term Rate Period, the holders of Bonds will not have the right to
tender their Bonds for purchase, (7) the redemption provisions that will apply
to the Bonds during such Term Rate Period, (8) whether any Credit Facility
shall be in effect after such effective date and the terms of any such Credit
Facility (including the interest coverage and expiration date thereof), and (9)
the rating or ratings, if any, which the Bonds are expected to receive from the
Rating Agencies as of such effective date.  In the event such adjustment or
continuation is not from a Term Rate Period to a Term Rate Period of equal
duration, such notice shall state (1) that the interest rate on the Bonds will
be adjusted to, or continue to be, a Term Rate, (2) the effective date of the
Term Rate Period, (3) that the Bonds shall be subject to mandatory tender for
purchase on such effective date, (4) the procedures for such mandatory tender,
and (5) that the holders of the Bonds do not have the right to retain their
Bonds on such effective date.

                          (v)     Variable Term Rate.

                          (A)     Determination of Variable Term Segments and
Variable Term Rates.  During each Variable Term Rate Period, each Bond shall
bear interest during each Variable Term Segment for such Bond at the Variable
Term Rate for such Bond as described herein.  Each Variable Term Segment and
Variable Term Rate for each Bond shall be the Variable Term Segment and
Variable Term Rate determined by the Remarketing Agent by agreement with the
purchaser of such Bond.  Each Variable Term Segment for any Bond shall be a
period, of not less than one nor more than 230 days, determined by the
Remarketing Agent to be, in its judgment, the period which, together with all
other Variable Term Segments for all Bonds then outstanding, is likely to
result in the lowest





                                          21
<PAGE>   26


overall net interest expense on the Bonds; provided, however, that any such
Bond purchased on behalf of the Borrower and remaining unsold in the hands of
the Remarketing Agent as of the close of business on the effective date of the
Variable Term Segment for such Bond shall have a Variable Term Segment of one
day or, if such Variable Term Segment would not end on a day immediately
preceding a Business Day, a Variable Term Segment of more than one day ending
on the day immediately preceding the next Business Day; provided, further,
however, that (1) each Variable Term Segment shall end on a day which
immediately precedes a Business Day and no Variable Term Segment shall extend
beyond the final maturity date of the Bonds, and (2) if for any reason the
Remarketing Agent fails or is unable to determine a Variable Term Segment on
any Bond, the Variable Term Segment for such Bond shall be one day, unless such
Variable Term Segment would end on a day which does not precede a Business Day,
in which case such Variable Term Segment shall end on the first day immediately
preceding the Business Day next succeeding such day.

                 The Variable Term Rate for each Variable Term Segment for each
Bond shall be the rate determined by the Remarketing Agent (based on the
examination of Tax-Exempt obligations comparable to the Bonds known by the
Remarketing Agent to have been priced or traded under the then prevailing
market conditions) no later than the first day of such Variable Term Segment
(and in the case of a Variable Term Segment of one day, no later than 2:00 p.m.
New York time, on such date) to be the lowest rate which would enable the
Remarketing Agent to sell the Bonds on the effective date of such rate at a
price (without regarding accrued interest) equal to 100% of the principal
amount thereof.  If a Variable Term Rate for a Variable Term Segment of one day
is not determined or effective, the Variable Term Rate for such Variable Term
Segment of one day shall be eighty percent (80%) of the most recent One-Year
Note Index theretofore published in The Bond Buyer.  In no event shall the
Variable Term Rate for any Bond exceed the Maximum Interest Rate.

                          (B)     Adjustment to Variable Term Rates.  At any
time (subject to the provisions of (1)(b) of this paragraph), the Borrower, by
written notice to the City, the Trustee, the Paying Agent and the Remarketing
Agent, may elect that the Bonds shall bear interest at Variable Term Rates.
Such notice (1) shall specify the effective date of the Variable Term Rate
Period during which the Bonds shall bear interest at Variable Term Rates, which
shall be (a) a Business Day not earlier than the twelfth day (the fifteenth day
if the then current Rate Period shall be a Term Rate Period or if the Bonds are
then held in book-entry form as provided in Section 2.01(h)) following the
fifth Business Day after the date of receipt by the Trustee of such notice (or
such shorter period after the date of such receipt as shall be acceptable to
the Trustee), and (b) in the case of an adjustment from a Term Rate Period, a
day on which the Bonds would be permitted to be redeemed at the option of the
Borrower pursuant to Section 4.01(a)(2)(C) hereof or the day





                                          22
<PAGE>   27


immediately following the last day of the then current Term Rate Period;
provided, however, that if prior to the Borrower making such election any Bonds
shall have been called for redemption and such redemption shall not have
theretofore been effected, the effective date of such Variable Term Rate Period
shall not precede such redemption date; and (2) shall be accompanied by an
opinion of Bond Counsel addressed to the City to the effect that such
adjustment (a) is authorized or permitted by the Indenture and the Law and (b)
will not adversely affect the Tax-Exempt status of interest on the Bonds.

                          (C)     Notice of Adjustment to Variable Term Rates.
The Trustee shall give Notice by Mail of an adjustment to a Variable Term Rate
Period to the holders of the affected Bonds not less than 12 days (15 days if
the then current Rate Period shall be a Term Rate Period or if such Bonds are
then held in book-entry form as provided in Section 2.01(h)) prior to the
effective date of such Variable Term Rate Period.  Such notice shall state (1)
that the interest rate on the Bonds will be adjusted to Variable Term Rates,
(2) the effective date of such Variable Term Rate Period, (3) that the Bonds
are subject to mandatory tender for purchase on the effective date of such
Variable Term Rate Period, (4) the procedures for such mandatory tender, and
(5) that the holders of the Bonds do not have the right to retain their Bonds
on such effective date.

                          (D)     Adjustment from Variable Term Rates.  At any
time during a Variable Term Rate Period, the Borrower may elect that the Bonds
shall no longer bear interest at Variable Term Rates and shall instead bear
interest as otherwise permitted under this Indenture.  The Borrower shall
notify the City, the Trustee, the Paying Agent and the Remarketing Agent of
such election and shall specify the Rate Period to follow with respect to such
Bonds upon cessation of the Variable Term Rate Period and instruct the
Remarketing Agent to (1) determine Variable Term Segments of such duration
that, as soon as possible, all Variable Term Segments shall end on the same
date, not earlier than the eleventh day following the fifth Business Day (or
such shorter period acceptable to the Trustee), following the receipt by the
Trustee of the notice required by the second succeeding sentence, which date
shall be the last day of the then current Variable Term Rate Period, and, upon
the establishment of such Variable Term Segments the day next succeeding the
last day of all such Variable Term Segments shall be the effective date of the
Term Rate Period, Weekly Rate Period or Daily Rate Period elected by the
Borrower; or (2) determine Variable Term Segments that will in the judgment of
the Remarketing Agent best promote an orderly transition to the next succeeding
Rate Period to apply to such Bonds, beginning not earlier than the eleventh day
following the fifth Business Day (or such shorter period acceptable to the
Trustee) following the receipt by the Trustee of the notice required by the
second succeeding sentence.  If the alternative in clause (2) above is
selected, the day next succeeding the last day of the Variable Term Segment for
each Bond shall be with





                                          23
<PAGE>   28


respect to such Bond the effective date of the Rate Period elected by the
Borrower.  The Remarketing Agent, promptly upon the determination thereof,
shall give written notice of such last and such effective dates to the
Borrower, the Trustee and the Paying Agent.  During any transitional period
from a Variable Term Rate Period to the next succeeding Rate Period in
accordance with clause (2) above, the provisions of this Indenture relating to
the Bonds shall be deemed to apply to the Bonds as follows:  The Bonds
continuing to bear interest at Variable Term Rates shall have applicable to
them the provisions hereunder theretofore applicable to such Bonds as if all
Bonds were continuing to bear interest at Variable Term Rates and the Bonds
bearing interest at the interest rate to which the transition is being made
will have applicable to them the provisions hereunder as if all Bonds were
bearing interest at such interest rate.

                     (vi)         Determination Conclusive.  The determination
of any Variable Term Rate, Daily Rate, Weekly Rate and Term Rate and each
Variable Term Segment by the Remarketing Agent shall be conclusive and binding
upon the Remarketing Agent, the Trustee, the Paying Agent, the City, the
Borrower and the holders of the Bonds.

                 (d)      Holder's Option to Tender for Purchase.  (i) During
any Daily Rate Period, any Bond or portion thereof in an Authorized
Denomination shall be purchased on any Business Day at a purchase price equal
to 100% of the principal amount thereof plus accrued interest from the Interest
Payment Date next preceding the date of purchase to the date of purchase
(unless the date of purchase shall be an Interest Payment Date, in which case
the purchase price shall be equal to the principal amount thereof), upon (A)
delivery to the Tender Agent at its Principal Office, by no later than 10:30
a.m., New York time, on such Business Day, of an irrevocable notice by
telephone or in person (promptly confirmed in writing), which states the
principal amount of such Bond to be tendered for purchase and the Purchase
Date, and (B) delivery of such Bond tendered for purchase to the Tender Agent
at its Principal Office, accompanied by an instrument of transfer thereof, in a
form satisfactory to the Tender Agent, executed in blank by the holder thereof
with the signature of such holder guaranteed by a bank, trust company or member
firm of the New York Stock Exchange, at or prior to 3:00 p.m., New York time,
on the Purchase Date. The Tender Agent shall keep a written record of the
notice described in clause (A).

                     (ii)         During any Weekly Rate Period, any Bond or
portion thereof in an Authorized Denomination shall be purchased on any
Business Day at a purchase price equal to 100% of the principal amount thereof
plus accrued interest from the Interest Payment Date next preceding the
Purchase Date to the Purchase Date (unless the Purchase Date shall be an
Interest Payment Date, in which case the purchase price shall be equal to the
principal amount thereof), upon (A) delivery to the Tender Agent at its





                                          24
<PAGE>   29


Principal Office of an irrevocable notice in writing, or by telephone confirmed
in writing, by 5:00 p.m., New York time, on any Business Day, which states the
principal amount of such Bond to be tendered for purchase and the Purchase
Date, which date shall not be prior to the seventh day next succeeding the date
of the delivery of such notice to the Tender Agent, and (B) delivery of such
Bond to the Tender Agent at its Principal Office, accompanied by an instrument
of transfer thereof, in a form satisfactory to the Tender Agent, executed in
blank by the holder thereof with the signature of such holder guaranteed by a
bank, trust company or member firm of the New York Stock Exchange, at or prior
to 3:00 p.m., New York time, on the Purchase Date.  The Tender Agent shall keep
a written record of the notice described in clause (A).

                    (iii)  Any Bond or portion thereof in an Authorized
Denomination shall be purchased on the first day of any Term Rate Period which
is preceded by a Term Rate Period of equal duration at a purchase price equal
to 100% of the principal amount thereof plus accrued interest from the Interest
Payment Date next preceding the date of purchase to the date of purchase
(unless the date of purchase shall be an Interest Payment Date, in which case
the purchase price shall be equal to the principal amount thereof), upon (A)
delivery to the Tender Agent at its Principal Office of an irrevocable notice
in writing by 5:00 p.m. New York time on any Business Day not less than seven
days before the Purchase Date, which states the principal amount of such Bond
to be tendered for purchase and the Purchase Date, and (B) delivery of such
Bond to the Tender Agent at its Principal Office, accompanied by an instrument
of transfer thereof, in a form satisfactory to the Tender Agent, executed in
blank by the holder thereof with the signature of such holder guaranteed by a
bank, trust company or member firm of the New York Stock Exchange, at or prior
to 3:00 p.m. New York time, on the Purchase Date.  The Tender Agent shall keep
a written record of the notice described in clause (A).

                     (iv)         If any Bond is to be purchased in part
pursuant to (i), (ii) or (iii), the amount so purchased and the amount not so
purchased must each be an Authorized Denomination.

                 (e)      Mandatory Tender for Purchase.  (i) Bonds shall be
subject to mandatory tender for purchase at a purchase price equal to 100% of
the principal amount thereof, plus accrued interest to the Purchase Date
described below, upon the occurrence of any of the events stated below:

                                  (A)      as to any Bond, on the effective
date of any change in a Rate Period, other than the effective date of a Term
Rate Period which was preceded by a Term Rate Period of the same duration;





                                          25
<PAGE>   30


                                  (B)      as to each Bond in a Variable Term
Rate Period, on the day next succeeding the last day of any Variable Term
Segment with respect to such Bond;

                                  (C)      as to all Bonds, on the second
Business Day next preceding the termination of any Credit Facility (whether
upon the stated termination date thereof or upon the substitution of a
different Credit Facility) unless the Trustee shall have received, on or before
the twentieth day prior to such termination date, written confirmation from
each Rating Agency that such termination shall not result in the lowering or
withdrawal of such Rating Agency's then current rating on the Bonds; or

                                  (D)  as to all Bonds, on a day, as specified
by the Trustee, not more than 20 days after receipt by the Trustee from the
Credit Provider, within 15 days after a drawing on the Credit Facility, of a
notice in the form set forth in the Credit Facility to the effect that the
Credit Provider has not been reimbursed for such drawing and that the amount
available to be drawn thereunder has not been reinstated.

                     (ii) The Bonds are also subject to mandatory tender for
purchase on the day next succeeding any Term Rate Period which ends prior to
the day originally established as the last day of such Term Rate Period, at a
purchase price equal to the principal amount thereof plus an amount equal to
any premium which would have been payable on such day had the Borrower directed
redemption of such Bonds pursuant to Section 4.01(a)(2)(C) hereof.
Notwithstanding the foregoing sentence, if a Credit Facility shall be in effect
on the day next succeeding such Term Rate Period, the Bonds shall not be
subject to such mandatory tender and the Trustee shall not give notice of such
mandatory tender unless the Trustee then holds Available Amounts sufficient to
pay, or the Credit Facility may be drawn upon to pay, any premium required to
be paid to holders of the Bonds in connection with such tender.

                    (iii)  The Trustee shall give Notice by Mail to the holders
of the Bonds at their addresses shown on the registration books kept by the
Registrar, of the termination of any Credit Facility and of the provision of
any proposed substitute Credit Facility, on the fifteenth day prior to such
termination or provision, which notice shall (i) include a general description
(which shall be provided to the Trustee by the Borrower) of any Credit Facility
in effect prior to the termination or provision and any substitute Credit
Facility to be in effect upon such termination or provision; (ii) state the
date of such termination or provision; (iii) state the rating or ratings, if
any, which the Bonds are expected to receive from the Rating Agencies following
such termination or provision; and (iv) if by the date of mailing of such
notice the Trustee shall not have received written confirmation from each
Rating Agency that such termination or provision shall not result in the
lowering or





                                          26
<PAGE>   31


withdrawal of such Rating Agency's then current rating on the Bonds, state that
the Bonds shall be subject to mandatory tender for purchase on the second
Business Day next preceding such termination in accordance with Section
2.01(e)(i)(C) hereof.

                     (iv)  Holders of Bonds bearing interest at Variable Term
Rates may on any Purchase Date occurring pursuant to Section 2.01(e)(i)(B)
hereof direct the Trustee not to purchase their Bonds, or portions of the
principal amount thereof (provided that the portion to be purchased and the
portion directed not to be purchased both are Authorized Denominations) on such
Purchase Date.  Such direction shall be given by telephone to the Tender Agent
at its Principal Office, on or prior to 10:30 a.m. New York time on the first
day of the applicable Variable Term Segment, specifying the numbers and
denominations of Bonds owned by such Bondholder and directing the Trustee not
to purchase such Bonds or portions thereof.  The Tender Agent will give
immediate notice to the Trustee upon the receipt of each such notice.  Any
owner who gives such a direction that its Bond not be purchased must surrender
such Bond to the Tender Agent in return for a Bond bearing interest for a new
Variable Term Segment.  Any instrument delivered to the Trustee in accordance
with this paragraph (iv) shall be irrevocable with respect to the purchase for
which such instrument was delivered and shall be binding upon any subsequent
holder of the Bond to which it relates, including any Bond issued in exchange
therefor or upon the registration of transfer thereof.

                          (v)  The Trustee shall, without further direction or
authorization, give Notice by Mail to the holders of the Bonds at their
addresses shown on the registration books kept by the Registrar, of any
mandatory tender occurring by reason of Section 2.01(e)(1)(D) hereof, no later
than five (5) days after receiving the notice from the Credit Provider
described in Section 2.01(e)(1)(D), and not less than fifteen (15) days prior
to such mandatory tender date.

                 (f)      Payment of Purchase Price.  If the Bonds to be
purchased pursuant to subsection (d) or (e) of this Section are remarketed, the
Tender Agent shall pay the purchase price of such Bonds by drawing upon the
moneys deposited therefor according to the terms of the Tender Agreement.  The
Registrar shall register new Bonds as directed by the Remarketing Agent and
make such Bonds available for delivery as provided in the Tender Agreement on
the date of such purchase.  Payment of the purchase price of any Bond shall be
made in immediately available funds for Bonds in Variable Term, Daily or Weekly
Rate Periods, or Bonds then held in book-entry only form as provided in Section
2.01(h), and in clearinghouse funds for Bonds in Term Rate Periods unless such
Bonds are then held in book-entry only form, but in each case only upon
presentation and surrender of such Bond to the Tender Agent except as otherwise
provided in Section 2.01(h).





                                          27
<PAGE>   32


                 If moneys sufficient to pay the purchase price of Bonds to be
purchased pursuant to Section 2.01(d) or Section 2.01(e) shall be held by the
Tender Agent on the date such Bonds are to be purchased such Bonds shall be
deemed to have been purchased and shall be purchased according to the terms of
the Tender Agreement, for all purposes of this Indenture, irrespective of
whether or not such Bonds shall have been delivered to the Tender Agent, and
the former holder of such Bonds shall have no claim thereon, under this
Indenture or otherwise, for any amount other than the purchase price thereof.

                 In the event any Bonds purchased according to the terms of the
Tender Agreement as provided in this Section 2.01 shall not be presented to the
Tender Agent, the Tender Agent shall segregate and hold uninvested the moneys
for the purchase price of such Bonds in trust, without liability for interest
thereon, for the benefit of the former holders of such Bonds, who shall, except
as provided in the following sentence, thereafter be restricted exclusively to
such moneys for the satisfaction of any claim for the purchase price of such
Bonds.  Any moneys which the Tender Agent shall segregate and hold in trust for
the payment of the purchase price of any Bond and remaining unclaimed for two
(2) years after the date of purchase shall, upon the Borrower's written request
to the Tender Agent, be paid to the Borrower.  After the payment of such
unclaimed moneys to the Borrower, the former holder of such Bond shall look
only to the Borrower for the payment thereof.

                 (g)      Form of Bonds.  The Bonds and the certificate of
authentication to be executed thereon shall be in substantially the form
attached hereto as Exhibit A, with such appropriate variations, omissions and
insertions as are permitted or required by this Indenture.  Pursuant to
recommendations promulgated by the Committee on Uniform Security Identification
Procedures, "CUSIP" numbers may be printed on the Bonds.  The Bonds may bear
such endorsement or legend relating thereto as may be required to conform to
usage or law with respect thereto.  If appropriate, the Bonds may be printed
with a portion of the text printed on the reverse side thereof and with a
legend printed on the front referring to such text to the following effect:
"Reference is hereby made to the further provisions of this Bond set forth on
the back hereof and such further provisions are hereby incorporated by
reference as if set forth here in full."  Upon adjustment to a Term Rate
Period, the form of Bond may include a summary of the mandatory and optional
redemption provisions to apply to the Bonds during such Term Rate Period, or a
statement to the effect that the Bonds will not be optionally redeemed during
such Term Rate Period, provided that the Registrar shall not authenticate such
a revised Bond form prior to receiving an opinion of Bond Counsel that such
Bond form conforms to the terms of the Law and of this Indenture and that
authentication thereof will not adversely affect the Tax-Exempt status of the
Bonds.





                                          28
<PAGE>   33


                 (h)  Book-Entry System.  Unless otherwise determined by the
City, the Bonds shall be issued in the form of a separate single certificated
fully registered Bond, registered in the name of Cede & Co., as nominee of DTC,
or any successor nominee (the "Nominee").  Except as provided in paragraph
(iii) below, all of the outstanding Bonds shall be so registered in the
registration books kept by the Registrar, and the provisions of this subsection
(h) shall apply thereto.

                          (i)     With respect to Bonds registered on the
registration books kept by the Registrar in the name of the Nominee, the City,
the Paying Agent and the Trustee shall have no responsibility or obligation to
any DTC Participant or to any person on behalf of which a DTC Participant holds
an interest in the Bonds.  Without limiting the immediately preceding sentence,
the City, the Paying Agent and the Trustee shall have no responsibility or
obligation with respect to (1) the accuracy of the records of DTC, the Nominee
or any DTC Participant with respect to any ownership interest in the Bonds,
(2) the delivery to any DTC Participant or any other person, other than a
Bondholder, as shown in the registration books kept by the Registrar, of any
notice with respect to the Bonds, including any notice of redemption, or
(3) the payment to any DTC Participant or any other person, other than a
Bondholder, as shown in the registration books kept by the Registrar, of any
amount with respect to principal of, premium, if any, or interest on the Bonds.
The City, the Paying Agent and the Trustee may treat and consider the person in
whose name each Bond is registered in the registration books kept by the
Registrar as the holder and absolute owner of such Bond for the purpose of
payment of principal, premium and interest with respect to such Bond, for the
purpose of giving notices of redemption and other matters with respect to such
Bond, for the purpose of registering transfers with respect to such Bond, and
for all other purposes whatsoever; provided, however, notwithstanding the
foregoing provisions, the Tender Agent shall accept any notice of optional
tender pursuant to Section 2.01(d) from any beneficial owner of any Bond held
in book-entry form, but shall make payment of the purchase price thereof only
to the registered owner of such Bond.  The Paying Agent shall pay all principal
of, premium, if any, and interest on the Bonds only to or upon the order of the
respective Bondholders, as shown in the registration books kept by the
Registrar, or their respective attorneys duly authorized in writing, and all
such payments shall be valid and effective to fully satisfy and discharge the
City's obligations with respect to payment of principal of, premium, if any,
and interest on the Bonds to the extent of the sum or sums so paid.  No person
other than a Bondholder, as shown in the registration books kept by the
Registrar, shall receive a certificated Bond evidencing the obligation of the
City to make payments of principal, premium, if any, and interest pursuant to
this Indenture.
                          
                          (ii)    The City, the Paying Agent and the Trustee 
shall execute and deliver to DTC a letter of representation in





                                          29
<PAGE>   34


customary form with respect to the Bonds in book-entry form (the
"Representation Letter"), but such Representation Letter shall not in any way
limit the provisions of the foregoing paragraph (i) or in any other way impose
upon the City any obligation whatsoever with respect to persons having
interests in the Bonds other than the Bondholders, as shown on the registration
books kept by the Registrar.  The Trustee and the Paying Agent shall take all
action necessary for all representations of the City in the Representation
Letter with respect to the Trustee and the Paying Agent to be complied with at
all times.

                     (iii) DTC may determine to discontinue providing its
services with respect to the Bonds at any time by giving reasonable notice to
the City, the Paying Agent and the Trustee and discharging its responsibilities
with respect thereto under applicable law.  The City, with the consent of the
Borrower, may, and upon request of the Borrower shall, terminate the services
of DTC with respect to the Bonds.  Upon the discontinuance or termination of
the services of DTC with respect to the Bonds, unless a substitute securities
depository is appointed by the City (with the consent of the Borrower) to
undertake the functions of DTC hereunder, the City, at the expense of the
Borrower, is obligated to deliver Bond certificates to the beneficial owners of
such Bonds, as described in this Indenture, and such Bonds shall no longer be
restricted to being registered in the registration books kept by the Registrar
in the name of the Nominee, but may be registered in whatever name or names
Bondholders transferring or exchanging Bonds shall designate, in accordance
with the provisions of this Indenture.

                          (iv)    Notwithstanding any other provision of this
Indenture to the contrary, so long as any Bond is registered in the name of the
Nominee, all payments with respect to principal or, premium, if any, and
interest on such Bond and all notices with respect to such Bond shall be made
and given, respectively, in the manner provided in the Representation Letter.
Bondholders shall have no lien or security interest in any rebate or refund
paid by DTC to the Paying Agent which arises from the payment by the Paying
Agent of principal of or interest on the Bonds in immediately available funds
to DTC.

                          (v) Notwithstanding any other provision of this
Indenture to the contrary, so long as any Bond is held in book-entry form, such
Bond need not be delivered in connection with any tender pursuant to Section
2.01(d) hereof, and all references in said Section to physical delivery of
Bonds shall be ineffective.  In such case, payment of the purchase price in
connection with such tender shall be made to the registered holder of such
Bonds on the date designated for such payment, without further action by the
beneficial owner who delivered the tender notice, and transfer of beneficial
ownership shall be made in accordance with the procedures of the Nominee.





                                          30
<PAGE>   35


                          (vi) So long as all outstanding Bonds are registered
in the name of the Nominee or its registered assigns, the City, the Trustee,
the Paying Agent and the Tender Agent shall cooperate with the Nominee, as the
sole registered Bondholder, and its registered assigns, in effecting payment of
the principal of, redemption premium, if any, and interest on the Bonds by
arranging for payment in such manner that funds for such payments are properly
identified and are made immediately available on the date they are due.

                          (vii) Upon delivery by DTC to the Registrar of
written notice to the effect that DTC has determined to substitute a new
Nominee in place of Cede & Co., and subject to the provisions of Section
2.01(b) hereof with respect to the payment of interest to the registered owners
of the Bonds as of the close of business on the Record Date next preceding the
applicable Interest Payment Date, the term "Nominee" shall refer to such new
nominee of DTC.

                 Section 2.02.  Execution of Bonds.  The Bonds shall be signed
in the name and on behalf of the City with the manual or facsimile signature of
its Mayor and attested by the manual or facsimile signature of its City Clerk
or Deputy City Clerk, under the seal of the City.  Such seal may be in the form
of a facsimile of the City's seal and may be imprinted or impressed upon the
Bonds.  The Bonds shall then be delivered to the Registrar or the Tender Agent
for authentication by the Trustee or the Tender Agent, as the case may be.  In
case any officer who shall have signed any of the Bonds shall cease to be such
officer before the Bonds so signed or attested shall have been authenticated or
delivered by the Registrar or issued by the City, such Bonds may nevertheless
be authenticated, delivered and issued and, upon such authentication, delivery
and issuance, shall be as binding upon the City as though those who signed and
attested the same had continued to be such officers of the City.  Also, any
Bond may be signed on behalf of the City by such persons as on the actual date
of the execution of such Bond shall be the proper officers although on the
nominal date of such Bond any such person shall not have been such officer.

                 Only such of the Bonds as shall bear thereon a certificate of
authentication in the form recited in Exhibit A hereto, manually executed by
the Registrar or the Tender Agent, shall be valid or obligatory for any purpose
or entitled to the benefits of this Indenture, and such certificate of the
Registrar shall be conclusive evidence that the Bonds so authenticated have
been duly authenticated and delivered hereunder and are entitled to the
benefits of this Indenture.

                 Upon authentication of any Bond, the Registrar or the Tender
Agent, as the case may be, shall set forth on such Bond (1) the date of such
authentication and (2) in the case of a Bond bearing interest at a Variable
Term Rate, such Variable Term Rate, the day next succeeding the last day of the
applicable





                                          31
<PAGE>   36


Variable Term Segment, the number of days comprising such Variable Term Segment
and the amount of interest to accrue during such Variable Term Segment.

                 Unless the City shall otherwise direct with the advice and
consent of the Borrower, the Tender Agent shall serve as co-authenticating
agent for the Bonds.

                 Section 2.03.  Transfer and Exchange of Bonds.  Registration
of any Bond may, in accordance with the terms of this Indenture, be
transferred, upon the books of the Registrar required to be kept pursuant to
the provisions of Section 2.04, by the person in whose name it is registered,
in person or by his duly authorized attorney, upon surrender of such Bond for
cancellation, accompanied by a written instrument of transfer in a form
approved by the Registrar, duly executed.  Whenever any Bond shall be
surrendered for registration of transfer, the City shall execute and the
Registrar shall authenticate and deliver a new Bond or Bonds of the same tenor
of Authorized Denominations.  No registration of transfer of Bonds shall be
required to be made during the period after any Record Date and prior to the
related Interest Payment Date or during the period of seven (7) Business Days
next preceding the date on which the Trustee gives any notice of redemption,
nor shall any registration of transfer of Bonds called for redemption be
required.

                 Bonds may be exchanged at the principal office of the
Registrar for a like aggregate principal amount of Bonds of the same tenor of
Authorized Denominations.  The Registrar shall require the payment by the
Bondholder requesting such exchange of any tax or other governmental charge
required to be paid with respect to such exchange, and there shall be no other
charge to any Bondholders for any such exchange.  Except with respect to Bonds
purchased pursuant to Section 2.01(e), no exchange of Bonds shall be required
to be made during the period after any Record Date and prior to the related
Interest Payment Date or during the period of seven (7) Business Days next
preceding the date on which the Trustee gives notice of redemption, nor shall
any exchange of Bonds called for redemption be required.

                 Section 2.04.  Bond Register.  The Registrar will keep or
cause to be kept at its principal office sufficient books for the registration
and the registration of transfer of the Bonds, which shall at all times be open
to inspection by the City, the Trustee and the Borrower; and, upon presentation
for such purpose, the Registrar shall, under such reasonable regulations as it
may prescribe, register the transfer or cause to be registered the transfer, on
said books, Bonds as hereinbefore provided.

                 Section 2.05.  Temporary Bonds.  The Bonds may be issued
initially in temporary form exchangeable for definitive Bonds when ready for
delivery.  The temporary Bonds may be printed, lithographed or typewritten,
shall be of such





                                          32
<PAGE>   37


denominations as may be determined by the City and may contain such reference
to any of the provisions of this Indenture as may be appropriate.  Every
temporary Bond shall be executed by the City and be authenticated and
registered by the Registrar upon the same conditions and in substantially the
same manner as the definitive Bonds.  If the City issues temporary Bonds, it
will execute and furnish definitive Bonds without delay, and thereupon the
temporary Bonds may be surrendered, for cancellation, in exchange therefor at
the principal office of the Registrar, and the Registrar shall authenticate and
deliver in exchange for such temporary Bonds an equal aggregate principal
amount of definitive Bonds of like tenor in Authorized Denominations.  Until so
exchanged, the temporary Bonds shall be entitled to the same benefits under
this Indenture as definitive Bonds authenticated and delivered hereunder.

                 Section 2.06.  Bonds Mutilated, Lost, Destroyed or Stolen.  If
any Bond shall become mutilated, the City, upon the request and at the expense
of the holder of said Bond, shall execute, and the Registrar shall thereupon
authenticate and deliver, a new Bond of like tenor and number in exchange and
substitution for the Bond so mutilated, but only upon surrender to the
Registrar of the Bonds so mutilated.  Every mutilated Bond so surrendered to
the Registrar shall be cancelled by it and destroyed and, upon the written
request of the City, a certificate evidencing such destruction shall be
delivered to the City.  If any Bond issued hereunder shall be lost, destroyed
or stolen, evidence of such loss, destruction or theft may be submitted to the
City, the Borrower and the Registrar, and if such evidence be satisfactory to
them and indemnity satisfactory to them shall be given, the City, at the
expense of the holder, shall execute, and the Registrar shall thereupon
authenticate and deliver, a new Bond of like tenor in lieu of and in
substitution for the Bond so lost, destroyed or stolen (or if any such Bond
shall have matured or shall be about to mature, instead of issuing a substitute
Bond the Registrar may pay the same without surrender thereof).  The City may
require payment of a reasonable fee for each new Bond issued under this Section
and payment of the expenses which may be incurred by the City and the
Registrar.  Any Bond issued under the provisions of this Section in lieu of any
Bond alleged to be lost, destroyed or stolen shall constitute an original
additional contractual obligation on the part of the City whether or not the
Bond so alleged to be lost, destroyed or stolen be at any time enforceable by
anyone, and shall be equally and proportionately entitled to the benefits of
this Indenture with all other Bonds secured by this Indenture.

                 Section 2.07.  Disposition of Cancelled Bonds.  When and as
paid in full, all Bonds, if any, shall be delivered to the Trustee and shall
forthwith be cancelled and destroyed by the Trustee.  If requested in writing
by the City, the Trustee shall deliver a certificate evidencing such
destruction to the City.





                                          33
<PAGE>   38



                                  ARTICLE III

                               ISSUANCE OF BONDS

                 Section 3.01.  Authentication and Delivery of Bonds.
Forthwith upon the execution and delivery of this Indenture, upon the execution
of the Bonds by the City and delivery thereof to the Registrar, as hereinabove
provided, and without any further action on the part of the City, the Registrar
shall authenticate the Bonds in an aggregate principal amount of fifty million
and no/100 dollars ($50,000,000) and shall deliver the Bonds to or upon the
Written Order of the City.

                 Section 3.02.  Application of Proceeds of Bonds. The proceeds
received by the City from the sale of the Bonds shall be deposited with the
Trustee, who shall forthwith set aside such proceeds into the Construction Fund
which Construction Fund the Trustee shall establish and maintain as further
provided in Section 3.03 hereof.

                 Section 3.03.  Construction Fund.  The Trustee does hereby
establish the Construction Fund to be designated the "City of Big Bear Lake
Industrial Development Revenue Bonds (Southwest Gas Corporation Project) 1993
Series A Construction Fund" (the "Construction Fund").  The monies in the
Construction Fund shall be held by the Trustee in trust and applied to the
payment of the Cost of the Project.

                 Before each payment is made from the Construction Fund by the
Trustee, there shall be filed with the Trustee a requisition conforming with
the requirements of this Section and Section 3.3 of the Agreement, in
substantially the same form as set forth in Exhibit B to the Agreement, stating
with respect to each payment to be made:

                          (1)     the requisition number;

                          (2)     the name and address of the person to whom
                 payment is due;

                          (3)     the purpose for which such payment is to be
                 made;

                          (4)     the amount to be paid;

                          (5)     that each obligation mentioned therein has
                 been properly incurred and is a proper charge against the
                 Construction Fund;

                          (6)     that none of the items for which payment is
                 requested has been previously reimbursed from the Construction
                 Fund;





                                          34
<PAGE>   39


                          (7)     that each item for which payment is requested
                 is or was necessary in connection with the acquisition,
                 construction, installation or financing of the Project; and

                          (8)     that 100% of the amount requisitioned,
                 together with all amounts requisitioned to date, in the
                 aggregate represents a Qualifying Cost as defined in the Tax
                 Certificate (excluding costs of issuance of the Bonds).

                 Each such requisition shall be sufficient evidence to the
Trustee of the facts stated therein and the Trustee shall have no duty to
confirm the accuracy of such facts.  Upon receipt of each such requisition,
signed by an Authorized Borrower Representative, the Trustee shall pay the
amount set forth therein as directed by the terms thereof.

                 The Construction Fund shall be closed upon the earlier of: (a)
the disbursement of all moneys held therein or (b) receipt by the Trustee of a
certificate conforming with the requirements of Section 3.4 of the Agreement.
In the event that the Trustee shall receive a certificate described in clause
(b) of the immediate proceeding sentence, and after payment of costs payable
from the Construction Fund or provision satisfactory to the Trustee having been
made for payment of such costs not yet due as provided in such certificate, the
Trustee shall transfer any remaining balance in the Construction Fund into a
separate account within the Bond Fund, which the Trustee shall establish and
hold in trust, and  which shall be entitled the "Surplus Account."  There shall
also be deposited in the Surplus Account amounts received from the Borrower
pursuant to Section 3.4 of the Agreement for the purpose of redeeming Bonds in
the next largest principal amount divisible by Authorized Denominations.  The
monies in the Surplus Account shall be used and applied (unless some other
application of such monies is requested by the Borrower and would not, in the
opinion of Bond Counsel, cause interest on the Bonds to become no longer
Tax-exempt) to the redemption of Bonds in Authorized Denominations, to the
maximum degree permissible, and at the earliest possible dates at which the
Bonds can be redeemed without payment of premium pursuant to this Indenture.
Notwithstanding Section 5.04, the monies in the Surplus Account shall be
invested at the written direction of the Borrower in Investment Securities
having a non-variable yield no higher than the yield on the Bonds (unless in
the opinion of Bond Counsel investment at a variable or higher non-variable
yield would not cause interest on the Bonds to become no longer Tax-exempt),
and all such investment income shall be deposited in the Surplus Account and
expended or reinvested as provided above.

                 In the event of redemption of all the Bonds pursuant to
Section 4.01 hereof or an Event of Default which causes acceleration of the
Bonds, any monies then remaining in the Construction Fund shall be transferred
to the Bond Fund and all





                                          35
<PAGE>   40


monies in the Bond Fund shall be used to pay the principal of the Bonds.


                                   ARTICLE IV

                              REDEMPTION OF BONDS

                 Section 4.01.  Redemption of Bonds.  The Bonds are subject to
redemption if and to the extent the Borrower is entitled or required to make
and makes a prepayment pursuant to Article VII of the Agreement.  The Trustee
shall not give notice of any optional redemption under Section 4.01(a) hereof
unless the Borrower has so directed in accordance with Section 7.5 of the
Agreement and the Trustee then holds Available Amounts on deposit in the Bond
Fund sufficient to pay, and set aside for the payment of, all amounts due on
such redemption, or if the Credit Facility then in effect may be drawn upon to
pay such amounts and is in an amount sufficient to pay any premium plus the
other amounts required to be paid in connection with such redemption.  In the
event of a failure by the Borrower to give a notice of mandatory prepayment
under such Section 7.5, such notice may be given by the City, the Trustee or
any holder or holders of ten percent (10%) or more in aggregate principal
amount of Bonds Outstanding.

                 The Bonds shall be redeemed upon the following terms:

                 (a)      Redemption Upon Optional Prepayment.  (1)  The Bonds
shall be redeemed in whole at any time at a redemption price equal to the
principal amount thereof plus accrued interest to the redemption date upon
receipt by the Trustee of a written notice from the Borrower stating that the
Board of Directors of the Borrower has determined in good faith, by resolution
of such Board, that any of the following events has occurred within the
preceding one hundred eighty (180) days and that the Borrower therefore intends
to exercise its option to prepay the payments due under the Agreement in whole
pursuant to Section 7.2 of the Agreement and thereby effect the redemption of
Bonds in whole:

                 (A)      Changes in economic availability of raw materials,
         operating supplies or facilities necessary to operate all or a
         substantial part of the Project or technological or other changes
         which make the continued operation of the Project or such substantial
         portion uneconomical, in the opinion of the Borrower, shall have
         occurred and shall have resulted in a cessation of all or
         substantially all of its normal operations of the Project.

                 (B)      Unreasonable burdens or excessive liabilities shall
         have been imposed upon the City or the Borrower affecting all or a
         substantial part of the Project, including without limitation federal,
         state or other ad





                                          36
<PAGE>   41


         valorem, property, income or other taxes not being imposed on the date
         of the Agreement.

                 (C)      All or substantially all of the property of the
         Borrower shall be transferred or sold to any corporation other than an
         affiliate of the Borrower or the Borrower shall be consolidated with
         or merged into a corporation other than an affiliate of the Borrower
         in such manner that the Borrower is not the surviving corporation.

                 (2)  The Bonds shall be subject to redemption upon prepayment
of the Repayment Installments at the option of the Borrower, in whole, or in
part by lot, prior to their maturity dates, as follows:

                 (A)  During any Variable Term Rate Period, each Bond shall be
         subject to such redemption on the day next succeeding the last day of
         each Variable Term Segment for such Bond at a redemption price equal
         to 100% of the principal amount thereof.

                 (B)  During any Daily Rate Period or Weekly Rate Period, the
         Bonds shall be subject to such redemption on any Business Day at a
         redemption price equal to 100% of the principal amount thereof, plus
         accrued interest, if any, to the date of redemption.

                 (C)  During any Term Rate Period and on the day next
         succeeding the last day of each such Rate Period, the Bonds shall be
         subject to such redemption during the periods specified below, in
         whole at any time or in part from time to time, at the redemption
         prices (expressed as percentages of principal amount) hereinafter
         indicated plus accrued interest, if any, to the redemption date:

<TABLE>
<CAPTION>
         Length of Term
          Rate Period                              Redemption Dates and Prices
         --------------                            ---------------------------
  <S>                                              <C>
  Greater than 15 years                            At any time on or after the first day of the calendar month
                                                   following the tenth anniversary of the effective date at
                                                   102% declining 1% annually to 100%

  Greater than 10 and less than or equal to        At any time on or after the first day of the calendar month
  15 years                                         following the tenth anniversary of the effective date at
                                                   101.5% declining 0.75% annually to 100%
</TABLE>





                                          37
<PAGE>   42


<TABLE>
  <S>                                              <C>
  Greater than 7 and less than or equal to 10      At any time on or after the first day of the calendar month
  years                                            following the seventh  anniversary of the effective date at
                                                   101.5% declining 0.5% annually to 100%

  Greater than 4 and less than or equal to 7       At any time on or after the first day of the calendar month
  years                                            following the fourth anniversary of the effective date at
                                                   101% declining 0.5% annually to 100%

  Greater than 2 and less than or equal to 4       At any time on or after the first day of the calendar month
  years                                            following the second anniversary of the effective date at
                                                   101.5% declining 0.25% each six months thereafter to 100%

  Greater than 1 and less than or equal to 2       At any time on or after first day of the calendar month
  years                                            following the first anniversary of the effective date at 
                                                   100.25%, declining 0.25% each six months thereafter to 100%

  Less than or equal to 1 year                     Not redeemable
</TABLE>

                 (3)  During any Term Rate Period the Bonds shall be subject to
redemption in whole, or in part by lot, on any date prior to the applicable
first date for optional redemption as set forth in Section 4.01(a)(2)(C) above,
at a redemption price equal to the applicable redemption price that would be in
effect on such first date for optional redemption, plus interest accrued
thereon to the date fixed for redemption, if the Borrower delivers to the
Trustee, within one hundred eighty (180) days after the Borrower has made the
determination referred to in clause (A) or (B) below, a written notice to the
effect that either:

                 (A)      (I)     the Borrower has determined that some or all
         of the interest payable under the Agreement for any sixty (60) days
         (which need not be consecutive) within any consecutive twenty-four
         (24) month period is not or will not be deductible, in whole or in
         part, for federal income tax purposes by reason of Section 150(b) of
         the Code (or would not be deductible unless some or all of the Bonds
         are redeemed) due to a change in use of the Project or any portion
         thereof, and (II) the Borrower will not claim deductions for such
         interest on its federal income tax returns; or

                 (B)      (I)     the Borrower has determined that there is
         "substantial authority" (within the meaning of





                                          38
<PAGE>   43


         Section 6662(d)(2)(B)(i) of the Code) to support the position that
         Section 150(b) of the Code will not prevent interest payable under the
         Agreement for any sixty (60) days (which need not be consecutive)
         within any consecutive twenty-four (24) month period from being
         deductible, in whole or in part, for federal income tax purposes, and
         (II) the Borrower after reasonable effort has been unable to obtain an
         opinion of independent counsel that it is more likely than not that
         Section 150 of the Code will not prevent deductions for such interest
         expense.

In the case of a redemption pursuant to this Section 4.01(a)(3), the Borrower
may only direct the Trustee to redeem such principal amount of Bonds as the
Borrower determines is necessary to assure that the Borrower retains its right
to all such deductions otherwise allowable or, if a partial redemption will not
enable the Borrower to retain the right to deduct such interest, the Borrower
may direct the Trustee to redeem all the Outstanding Bonds or any portion
thereof.

                 (4)      With respect to any Term Rate Period the Borrower may
specify in the notice required by Section 2.01(c)(iv)(B) hereof redemption
provisions, prices and periods other than those set forth above (including that
there be no such optional redemption); provided, however, that such notice
shall be accompanied by an opinion of Bond Counsel addressed to the City to the
effect that such changes (i) are authorized or permitted by the Law and this
Indenture, and (ii) will not adversely affect any exemption of the interest on
the Bonds from federal income taxation.

                 (b)      Redemption Upon Mandatory Prepayment.  The Bonds
shall be subject to redemption from amounts which are required to be prepaid by
the Borrower under Section 7.3 of the Agreement, as set forth below.  In each
case, the Trustee shall give notice of such redemption as provided in Section
4.03 hereof.

                 (1)      The Bonds shall be redeemed in whole on any date at a
         redemption price equal to the principal amount thereof plus accrued
         interest to the redemption date upon the occurrence of a Determination
         of Taxability;provided, however, that all Bonds shall be redeemed upon
         such event unless, in the opinion of Bond Counsel delivered to the
         Trustee, the redemption of a specified portion of the Bonds
         Outstanding would have the result that interest payable on the Bonds
         remaining Outstanding after such redemption would be Tax-exempt to any
         holder of a Bond (other than a holder who is a "substantial user" of
         the Project or the Clark County Project or a "related person" within
         the meaning of Section 147(a) of the Code), and in such event the
         Bonds shall be redeemed (in Authorized Denominations) in such amount
         as Bond Counsel in such opinion shall have determined is necessary to
         accomplish that result.





                                          39
<PAGE>   44


                 (2)  The Bonds shall be redeemed in whole at a redemption
         price equal to the principal amount thereof plus accrued interest to
         the redemption date, upon the acceleration of payments due under the
         Agreement following an "Event of Default" thereunder.

                 (3)  The Bonds shall be redeemed in part on any date after the
         Completion Date at a redemption price equal to the principal amount
         thereof plus accrued interest to the redemption date to the extent of
         amounts on deposit in the Surplus Account after the Completion Date.

                 Section 4.02.  Selection of Bonds for Redemption.  If less
than all of the Bonds are called for redemption, the Trustee shall select the
Bonds or any given portion thereof to be redeemed, from the outstanding Bonds
or such given portion thereof not previously called for redemption, by lot.
For the purpose of any such selection the Trustee shall assign a separate
number for each minimum Authorized Denomination of each Bond of a denomination
of more than such minimum; provided that following any such selection, both the
portion of such Bond to be redeemed and the portion remaining shall be in
Authorized Denominations.  The Trustee shall promptly notify the City and the
Borrower in writing of the numbers of the Bonds or portions thereof so selected
for redemption.

                 Section 4.03.  Notice of Redemption.  The Trustee, for and on
behalf of the City, shall give Notice of any redemption by Mail, postage
prepaid, not less than fifteen (15) nor more than sixty (60) days prior to the
redemption date, to (i) the registered owner of such Bond at the address shown
on the registration books of the Registrar on the date such notice is mailed;
(ii) the Securities Depositories; and (iii) one or more Information Services.
Notice of redemption to the Securities Depositories and the Information
Services shall be given by telecopy confirmed by first-class mail.  Each notice
of redemption shall state the date of such notice, the date of issue of the
Bonds to be redeemed, the redemption date, the redemption price, the place of
redemption (including the name and appropriate address or addresses of the
Paying Agent), the source of the funds to be used for such redemption, the
principal amount, the CUSIP number (if any) of the maturity and, if less than
all, the distinctive certificate numbers of the Bonds to be redeemed and, in
the case of Bonds to be redeemed in part only, the respective portions of the
principal amount thereof to be redeemed.  Each such notice shall also state
that the interest on the Bonds designated for redemption shall cease to accrue
from and after such redemption date and that on said date there will become due
and payable on each of said Bonds the principal amount thereof to be redeemed,
interest accrued thereon, if any, to the redemption date and the premium, if
any, thereon (such premium to be specified) and shall require that such Bonds
be then surrendered at the address or addresses of the Paying Agent specified
in the redemption notice.  Notwithstanding the





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<PAGE>   45
foregoing, failure by the Trustee to give notice pursuant to this paragraph to
any one or more of the Information Services or Securities Depositories or the
insufficiency of any such notices shall not affect the sufficiency of the
proceedings for redemption.  Failure to mail the notices required by this
paragraph to any registered owner of any Bonds designated for redemption, or
any defect in any notice so mailed, shall not affect the validity of the
proceedings for redemption of any other Bonds and shall not extend the period
for making elections or in any way change the rights of the holders of the
Bonds to elect to have their Bonds purchased as provided herein.

                 If upon the expiration of thirty (30) days succeeding any
redemption date, any Bonds so called for redemption shall not have been
presented to the Trustee for payment, the Trustee shall no later than sixty
(60) days following such redemption date send Notice by Mail to the holder of
each Bond not so presented.

                 Section 4.04.  Partial Redemption of Bonds.  Upon surrender of
any Bond redeemed in part only, the Registrar shall exchange the Bond redeemed
for a new Bond of like tenor and in an Authorized Denomination without charge
to the Holder in the principal amount of the portion of the Bond not redeemed.
The City and the Trustee shall be fully released and discharged from all
liability to the extent of payment of the redemption price for such partial
redemption.

                 Section 4.05.  Effect of Redemption.  Notice of redemption
having been duly given as aforesaid, and moneys for payment of the redemption
price being held by the Trustee, the Bonds so called for redemption shall, on
the redemption date designated in such notice, become due and payable at the
redemption price specified in such notice, interest on the Bonds so called for
redemption shall cease to accrue, said Bonds shall cease to be entitled to any
lien, benefit or security under this Indenture, and the holders of said Bonds
shall have no rights in respect thereof except to receive payment of the
redemption price thereof, without interest accrued on any funds held after the
redemption date to pay such redemption price.

                 All Bonds fully redeemed pursuant to the provisions of this
Article IV shall be cancelled upon surrender thereof and destroyed by the
Registrar, which shall, upon the written request of the City, deliver to the
City a certificate evidencing such destruction.




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<PAGE>   46
                                   ARTICLE V

                                    REVENUES

                 Section 5.01.  Pledge of Revenues.  All of the Revenues and
any Credit Facility are hereby irrevocably pledged to the punctual payment of
the principal of and interest and premium, if any, on the Bonds, and Revenues
shall not be used for any other purpose while any of the Bonds remain
outstanding.  Said pledge shall constitute a first and exclusive lien on the
Revenues and any Credit Facility for the payment of the Bonds in accordance
with the terms thereof.

                 All Revenues and any Credit Facility shall be held in trust
for the benefit of the holders from time to time of the Bonds, but shall
nevertheless be disbursed, allocated and applied solely for the uses and
purposes hereinafter in this Article V set forth.

                 Neither the faith and credit nor the taxing power of the State
of California or the City is pledged to the payment of the principal of,
premium, if any, or interest on the Bonds, nor is the State of California or
the City in any manner obligated to make any appropriation for payment of the
Bonds.  The Bonds do not constitute a debt or liability of the State of
California, the City or any public agency and are payable solely from the
sources identified in this Indenture.  The issuance of the Bonds shall not
directly or indirectly or contingently obligate the City, the State of
California or any public agency to levy or to pledge any form of taxation
whatever therefor or to make any appropriation for their payment.

                 Section 5.02.  Bond Fund.  Upon the receipt thereof, the
Trustee shall deposit all accrued interest, if any, paid at the sale of the
Bonds and all Revenues in the "City of Big Bear Lake IDRB (Southwest Gas
Corporation Project) 1993 Series A Bond Fund" (herein called the "Bond Fund"),
which the Trustee shall establish and maintain and hold in trust, and which
shall be disbursed and applied only as hereinafter authorized.  Except as
provided below, moneys in the Bond Fund shall be used solely for the payment of
the principal of, premium, if any, and interest on the Bonds as the same shall
become due and payable at maturity, upon redemption or otherwise.

                 The Trustee shall deposit in the Bond Fund from time to time,
upon receipt thereof, (i) all amounts received by the Trustee pursuant to any
Credit Facility as provided in Section 5.07 hereof; (ii) any income received
from the investment of moneys on deposit in the Bond Fund; (iii) amounts
transferred to the Bond Fund from the Construction Fund pursuant to Section
3.03 hereof; and (iv) any other Revenues, including insurance proceeds,
condemnation awards and other prepayment amounts received under the Agreement
from or for the account of the Borrower.  Available Amounts shall not be
commingled with other





                                          42
<PAGE>   47
moneys in the Bond Fund and the Trustee shall set up separate sub-accounts in
the Bond Fund for such amounts of each type.  Amounts transferred from the
Construction Fund following an Event of Default hereunder or under the
Agreement shall be used first to pay amounts due on the Bonds and then to
reimburse the Credit Provider for any such amounts received pursuant to the
Credit Facility.

                 Except as provided in this Section, Sections 5.06, 5.07, 6.06
and 10.03, moneys in the Bond Fund shall be used solely for the payment of the
principal of and premium, if any, and interest on the Bonds as the same shall
become due, whether at maturity or upon redemption or acceleration or
otherwise.  In making such payments, the Trustee shall (a) first use Available
Amounts held hereunder, except amounts received pursuant to the Credit
Facility; (b) then use amounts received by the Trustee under the Credit
Facility; and (c) then use any other Revenues received by the Trustee.

                 The stated amount of the Letter of Credit shall be unavailable
for the payment of principal of and interest on Credit Provider Bonds, it being
the intent of the parties hereto that, so long as the Letter of Credit is in
effect, principal of and interest on Credit Provider Bonds shall be payable
solely from the following sources, in the following priority: (1) proceeds of
the remarketing of Credit Provider Bonds paid by the purchasers thereof, (2)
amounts paid by the Borrower to the Trustee for deposit in the Bond Fund, and
(3) any other Revenues available therefor.

                 So long as no Event of Default (or any event which would be an
Event of Default hereunder with the passage of time or the giving of notice)
exists hereunder, on the fifth day after each Interest Payment Date, the
Trustee shall return to the Borrower (free and clear of the pledge and lien of
this Indenture) any moneys then on deposit in the Bond Fund (except the Surplus
Account) or shall deposit such funds in the Rebate Fund if so instructed by the
Borrower.

                 Section 5.03.  Trustee Authorized to Take Actions Under the
Agreement.  The City hereby authorizes and directs the Trustee, and the Trustee
hereby agrees, to take such actions as the Trustee, in its sole and absolute
discretion, deems necessary to enforce the Borrower's obligation under the
Agreement to make timely payment of principal of and interest on the Bonds to
the extent proceeds of drawings under any Credit Facility, Bond proceeds and
other moneys in the Bond Fund are not available for such payment in accordance
with the provisions of Section 5.02 hereof.

                 Section 5.04.  Investment of Moneys.  Subject to Sections 3.03
and 6.06 hereof, any moneys in any of the funds and accounts to be established
by the Trustee pursuant to this Indenture shall be invested upon the written
direction of the





                                          43
<PAGE>   48
Borrower, by the Trustee, if and to the extent then permitted by law, in
Investment Securities; provided, however, that any such moneys constituting
proceeds of a drawing under the Credit Facility shall be held uninvested.  In
the absence of such direction, the Trustee shall invest solely in units of a
money market portfolio restricted to obligations issued by, or guaranteed by
the full faith and credit of, the United States of America, or repurchase
agreements collateralized by such obligations.  Moneys in any fund or account
(other than moneys constituting proceeds of a drawing under the Credit
Facility, which shall be held uninvested) shall be invested in Investment
Securities with respect to which payments of principal thereof and interest
thereon are scheduled to be paid or are otherwise payable (including Investment
Securities payable at the option of the holder) not later than the date on
which it is estimated that such moneys will be required by the Trustee.
Available Amounts held in the Bond Fund shall be invested only in Government
Obligations maturing or subject to payment at par upon demand of the holder
thereof within 30 days after the acquisition of any such investment and in any
event not later than the date on which it is estimated that such moneys will be
required by the Trustee.

                 Except for purposes of Section 6.06, for the purpose of
determining the amount in any fund, all Investment Securities credited to such
fund shall be valued at the lesser of cost (which shall be (1) measured
exclusive of accrued interest after the first payment of interest following
purchase and (2) ratably increased over time by the amortization of any
difference between the initial purchase price, excluding accrued interest but
including commissions, and the par value) or par value (plus, prior to the
first payment of interest following purchase, the amount of any accrued
interest paid as part of the purchase price).

                 Any interest, profit or loss on such investments shall be
credited or charged to the respective funds from which such investments are
made.  The Trustee may sell or present for redemption any obligations so
purchased whenever it shall be necessary in order to provide moneys to meet any
payment, and the Trustee shall not be liable or responsible for any loss
resulting from such investment.  Unless otherwise directed by the Borrower, the
Trustee may make any investment permitted under this Section 5.04 through or
with its own commercial banking or investment departments.

                 Section 5.05.  Assignment to Trustee; Enforcement of
Obligations.  (a) The City hereby transfers, assigns and sets over to the
Trustee all of the Revenues and any and all rights and privileges it has under
the Agreement, except (i) the City's rights to receive any notices under this
Indenture or the Agreement, (ii) the City's right to receive payments, if any,
with respect to fees, expenses and indemnification and certain other purposes
under Sections 4.2(c), 4.2(e), 6.3, 8.2 and 8.3 of the Agreement and (iii) the
City's rights to give approvals or





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<PAGE>   49
consents pursuant to the Agreement, but including, without limitation, the
right to collect and receive directly all of the Revenues and the right to hold
and enforce any security interest, and any Revenues collected or received by
the City shall be deemed to be held, and to have been collected or received, by
the City as the agent of the Trustee, and shall forthwith be paid by the City
to the Trustee.  The Trustee also shall be entitled to take all steps, actions
and proceedings reasonably necessary in its judgment (1) to enforce the terms,
covenants and conditions of, and preserve and protect the priority of its
interest in and under, the Agreement, any Credit Facility and any other
security agreement with respect to the Project or the Bonds, and (2) to assure
compliance with all covenants, agreements and conditions on the part of the
City contained in this Indenture with respect to the Revenues.

                 Section 5.06.  Repayment to Borrower.  When there are no
longer any Bonds outstanding or provision for payment of the Bonds has been
made in accordance with Article X hereof, and all fees, charges and expenses of
the Trustee, the Registrar, the Tender Agent, the Remarketing Agent and any
paying agents have been paid or provided for, payment of the full amount owing
the United States Government, as determined under Section 5.6 of the Agreement,
Section 6.06 hereof and the Tax Certificate, all expenses of the City relating
to the Project and this Indenture have been paid or provided for, and all other
amounts payable hereunder and under the Agreement have been paid, and this
Indenture has been discharged and satisfied, the Trustee shall pay to the
Borrower any amounts remaining in any fund established and held hereunder.

                 Section 5.07.  Credit Facility; Credit Provider Bonds.  (a)
The Trustee shall accept the Letter of Credit as the initial Credit Facility
hereunder.  The Trustee acknowledges the right of the Borrower at any time to
terminate any Credit Facility and, if the Borrower so elects, to provide a
substitute Credit Facility with respect to the Bonds; provided, that no such
termination or substitution may be made with respect to any Bond during any
Term Rate Period or Variable Term Segment with respect to such Bond.  If there
shall have been delivered to the City and the Trustee (i) a Credit Facility
other than the Letter of Credit and (ii) an opinion of Bond Counsel to the
effect that the delivery of such Credit Facility to the Trustee is permitted
under the Law and the Agreement and complies with the terms of the Agreement
and the Indenture and that the delivery of such Credit Facility will not
adversely affect the Tax-Exempt status of interest on the Bonds, then the
Trustee shall accept such Credit Facility and, if so directed by the Borrower,
upon the effective date of such Credit Facility promptly surrender the Credit
Facility theretofore in effect in accordance with the respective terms thereof
for cancellation.  In the event that the Borrower elects to terminate a Credit
Facility or to provide a substitute Credit Facility, the Bonds shall be subject
to mandatory tender unless the Trustee shall have received timely written
confirmation from each Rating





                                          45
<PAGE>   50
Agency that such Rating Agency's then current rating on the Bonds will not be
lowered or withdrawn as a result of such termination or provision, all as
provided in Section 2.01(e)(1)(C) hereof.  If at any time there shall cease to
be any Bonds outstanding hereunder, or a Credit Facility shall be terminated
pursuant to its terms, the Trustee shall promptly surrender the Credit Facility
in accordance with the terms of the Credit Facility for cancellation.  The
Trustee shall comply with the procedures set forth in the Credit Facility
relating to the termination thereof.

                 (b)  In the case of a Credit Facility in the form of a letter
of credit, the Trustee shall draw on the Credit Facility subject to and in
accordance with its terms, in order to receive payment thereunder not later
than the time payment is due on the Bonds on the following dates in the
following amounts:

                 (i)      On each Interest Payment Date, in an amount which,
         together with Available Amounts in the Bond Fund, will be sufficient
         to pay all interest due and payable on the outstanding Bonds on such
         Interest Payment Date;

                (ii)      On any date fixed for payment or redemption of Bonds
         in part, in an amount which, together with Available Amounts in the
         Bond Fund (including amounts drawn pursuant to paragraph (a) above),
         will be sufficient to pay the amount due on such Bonds, including
         accrued interest;

               (iii)      On the date fixed for payment of the Bonds in
         connection with any declaration of the acceleration of the maturity of
         the Bonds following an Event of Default, as provided in Section 7.01
         hereof, in an amount which, together with Available Amounts in the
         Bond Fund, will be sufficient to pay all principal and interest due on
         the Bonds as a result of such declaration on the date fixed for such
         payment;

                (iv)      On each Purchase Date, in an amount sufficient to pay
         the purchase price of any Bonds tendered or deemed tendered pursuant
         to this Indenture and for which such purchase price has not been
         received upon the remarketing of such Bonds; and

                 (v)      On the final maturity or redemption date of the
         Bonds, in an amount which, together with Available Amounts in the Bond
         Fund (including amounts drawn pursuant to paragraph (a) above), will
         be sufficient to pay the principal and interest due on all outstanding
         Bonds on such final maturity or redemption date.

Each such drawing shall be made not later than the time required by the Credit
Facility in order to receive payment thereunder not later than the time payment
of the amount of such drawing is required to be made to the holders of the
Bonds pursuant to this Indenture and the Tender Agreement.  The Trustee shall
give





                                          46
<PAGE>   51
notice of each such drawing to the Borrower at the time of each draw.  The
proceeds of each such drawing shall be used in the order of priority
established by Section 5.02 hereof.  The Trustee shall comply with all
provisions of the Credit Facility in order to realize upon any drawing
thereunder, and will not draw upon the Credit Facility any amounts for payment
of Credit Provider Bonds or Bonds registered in the name of the City or the
Borrower or known by the Trustee to be registered in the name of any nominee of
the City or the Borrower unless the Credit Facility specifically permits such
drawing.

                 (c)  Any Bonds purchased with a drawing under a Credit
Facility pursuant to Section 5.07(b)(iv) hereof shall be registered in the name
of the Credit Provider or its nominee (or such other names as the Credit
Provider shall direct) and delivered to the Credit Provider in accordance with
the terms of the applicable Credit Agreement; provided, that if such Bonds are
then registered in the name of DTC or its Nominee pursuant to Section 2.01(h)
hereof, the Trustee shall immediately upon making any draw on a Credit Facility
pursuant to Section 5.07(b)(iv) hereof notify the Tender Agent.  Upon receipt
of such notice, the Tender Agent shall direct DTC to cause any Bonds purchased
with the proceeds of such draw to be transferred to the Tender Agent's account
at DTC, and such Bonds shall be held on the records of the Tender Agent in the
name of or for the account of the Credit Provider or its nominee (or such other
names as the Credit Provider shall direct).

                 (d)  Credit Provider Bonds shall bear interest at the
Reimbursement Rate in accordance with the first paragraph of Section 2.01(c)
hereof.

                 (e)  Credit Provider Bonds shall be remarketed by the
Remarketing Agent prior to any other Bonds tendered for purchase hereunder,
unless the Credit Provider shall otherwise direct the Remarketing Agent in
writing, and shall be remarketed in accordance with the terms of the
Remarketing Agreement.  Upon (i) receipt by the Trustee and the Tender Agent of
written notification from the Credit Provider that the Credit Facility (if any
is then in effect) has been fully reinstated with respect to principal and
interest and (ii) release by the Credit Provider of any Credit Provider Bonds
which the Remarketing Agent has remarketed, such Bonds shall be made available
to the purchasers thereof and shall no longer constitute Credit Provider Bonds
for purposes of this Indenture.  The proceeds of any remarketing of Credit
Provider Bonds (including interest, if any, accrued at the Reimbursement Rate)
shall be paid to the Credit Provider on such remarketing date in immediately
available funds.

                 (f)  Each of the Trustee and the Tender Agent agrees that it
will, immediately upon receipt, send to the Credit Provider (by telephonic or
electronic transmission capable of making a written record) a copy of every
notice received by it hereunder with respect to any of the Credit Provider
Bonds.





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<PAGE>   52
                 (g)  Notwithstanding anything to the contrary herein or in the
Bonds, all obligations of the Borrower under or in connection with any Credit
Agreement (including reimbursement obligations of the Borrower to any
participating credit providers with respect to a Credit Facility) shall be
governed by the terms of such Credit Agreement.


                                   ARTICLE VI

                             COVENANTS OF THE CITY

                 Section 6.01.  Payment of Principal and Interest.  The City
shall punctually pay, but only out of Revenues as herein provided, the
principal and the interest (and premium, if any) to become due in respect of
every Bond issued hereunder at the times and places and in the manner provided
herein and in the Bonds according to the true intent and meaning thereof.  All
such payments shall be made by the Trustee as provided in Section 2.01.  When
and as paid in full, all Bonds, if any, shall be delivered to the Trustee,
shall forthwith be cancelled and destroyed by the Trustee which, upon the
written request of the City, shall deliver a certificate evidencing such
destruction to the City.

                 Section 6.02.  Extension or Funding of Claims for Interest.
In order to prevent any accumulation of claims for interest after maturity, the
City shall not, directly or indirectly, extend or assent to the extension of
the time for the payment of any claim for interest on any of the Bonds, and
shall not, directly or indirectly, be a party to or approve any such
arrangement by purchasing or funding such claims or in any other manner.  In
case any such claim for interest shall be extended or funded, whether or not
with the consent of the City, such claim for interest so extended or funded
shall not be entitled, in case of default hereunder, to the benefits of this
Indenture, except subject to the prior payment in full of the principal of all
of the Bonds then outstanding and of all claims for interest which shall not
have been so extended or funded.

                 Section 6.03.  Paying Agents.  The Borrower, with the written
approval of the Trustee and the City, may appoint and at all times have one or
more Paying Agents (which shall meet the qualifications of the Trustee set
forth in Section 8.07 hereof) in such place or places as the Borrower may
designate, for the payment of the principal of, and the interest (and premium,
if any) on, the Bonds.  All provisions of Article VIII hereof which apply to
the Trustee shall also apply to any Paying Agent appointed hereunder.  It shall
be the duty of the Trustee to make such arrangements with any such paying agent
as may be necessary to assure, to the extent of the moneys held by the Trustee
for such payment, the prompt payment of the principal of and interest and
premium, if any, on the Bonds presented at either place of





                                          48
<PAGE>   53
payment.  The Paying Agent initially appointed hereunder is the Trustee.

                 Section 6.04.  Preservation of Revenues.  The City shall not
waive any provision of the Agreement or take any action to interfere with or
impair the pledge and assignment hereunder of Revenues and the assignment to
the Trustee of rights under the Agreement, or the Trustee's enforcement of any
rights thereunder, without the prior written consent of the Trustee.  The
Trustee may give such written consent, and may itself take any such action or
consent to an amendment or modification to the Agreement or to any other
document, instrument or agreement relating to the security for the Bonds, only
in accordance with the provisions of Article IX hereof.

                 Section 6.05.  Compliance with Indenture.  The City shall not
issue, or permit to be issued, any Bonds secured or payable in any manner out
of Revenues in any manner other than in accordance with the provisions of this
Indenture, and shall not suffer or permit any default to occur under this
Indenture, but shall faithfully observe and perform all the covenants,
conditions and requirements hereof.

                 Section 6.06.  Arbitrage Covenants.  (a) The City covenants
with all persons who hold or at any time held Bonds that the City will not
directly or indirectly use the proceeds of any of the Bonds or any other funds
of the City or, to the extent within its control, permit the use of the
proceeds of any of the Bonds or any other funds of the City or take or omit to
take any other action which will cause any of the Bonds to be "arbitrage bonds"
or otherwise subject to federal income taxation by reason of Sections 103 and
141 through 150 of the Code and any applicable regulations promulgated
thereunder.  To that end the City covenants to comply with all covenants set
forth in the Tax Certificate, which is incorporated herein by reference.

                 (b)      Notwithstanding any provision of this Indenture,
including in particular Article X hereof, the obligation to comply with all
requirements of this Section 6.06, Section 5.6 of the Agreement and the Tax
Certificate shall survive the defeasance or payment in full of the Bonds.

                 Section 6.07.  Other Liens.  So long as any Bonds are
outstanding, the City shall not create or suffer to be created any pledge, lien
or charge of any type whatsoever upon all or any part of the Trust Estate,
other than the lien of this Indenture.

                 Section 6.08.  Further Assurances.  Whenever and so often as
requested so to do by the Trustee, the City shall promptly execute and deliver
or cause to be executed and delivered all such other and further instruments,
documents or assurances, and promptly do or cause to be done all such other and
further things, as may be necessary or reasonably required in order to further
and more fully vest in the Trustee and the





                                          49
<PAGE>   54
Bondholders all of the rights, interests, powers, benefits, privileges and
advantages conferred or intended to be conferred upon them by this Indenture
and to perfect and maintain as perfected such rights, interests, powers,
benefits, privileges and advantages.


                                  ARTICLE VII

                                    DEFAULT

                 Section 7.01.  Events of Default; Acceleration; Waiver of
Default.  Each of the following events shall constitute an "Event of Default"
hereunder:

                 (a)      Failure to make payment of any installment of
interest upon any Bond when the same shall have become due and payable;

                 (b)      Failure to make due and punctual payment of the
principal of and premium, if any, on any Bond at the stated maturity thereof,
or upon proceedings for redemption thereof or upon the maturity thereof by
declaration, or failure by the Borrower to make any payment necessary to
purchase Bonds tendered for purchase in accordance with Section 2.01(d) or (e)
hereof;

                 (c)      Default by the City in the performance or observance
of any other of the covenants, agreements or conditions on its part in this
Indenture or in the Bonds contained, and the continuance of such default for a
period of ninety (90) days after written notice thereof, specifying such
default and requiring the same to be remedied, shall have been given to the
City, the Borrower and the Credit Provider by the Trustee, or to the City, the
Borrower, the Credit Provider and the Trustee by the holders of not less than
twenty-five percent (25%) in aggregate principal amount of the Bonds at the
time outstanding.

                 No default specified in (c) above shall constitute an Event of
Default unless the City, the Borrower or the Credit Provider shall have failed
to correct such default within the applicable 90-day period; provided, however,
that if the default shall be such that it can be corrected, but cannot be
corrected within such period, it shall not constitute an Event of Default if
corrective action is instituted by the City, the Borrower or the Credit
Provider within the applicable period and diligently pursued until the default
is corrected.  With regard to any alleged default concerning which notice is
given to the Borrower or the Credit Provider under the provisions of this
Section, the City hereby grants the Borrower and the Credit Provider full
authority for account of the City to perform any covenant or obligation the
non-performance of which is alleged in said notice to constitute a default in
the name and stead of the City with full power to do any and all things and
acts to the same extent





                                          50
<PAGE>   55
that the City could do and perform any such things and acts and with power of
substitution.

                 Upon the occurrence and continuation of an Event of Default
hereunder, the Trustee may, and upon the written request of the Credit Provider
or the holders of not less than 25% in aggregate principal amount of Bonds then
outstanding, shall by notice in writing delivered to the Borrower with copies
of such notice being sent to the City, declare the principal of all Bonds then
outstanding and the interest accrued thereon immediately due and payable, and
such principal and interest shall thereupon become and be immediately due and
payable.  Notwithstanding the foregoing, the Trustee shall not be required to
take any action upon the occurrence and continuation of an Event of Default
under Section 7.01(c) above until a Responsible Officer of the Trustee has
actual knowledge of such Event of Default.  After such declaration of
acceleration the Trustee shall immediately take such actions as necessary to
realize moneys under any Credit Facility and shall declare all indebtedness
payable under Section 4.2(a) of the Agreement to be immediately due and payable
in accordance with Section 6.2 of the Agreement and may exercise and enforce
such rights as exist under the Agreement.

                 The preceding paragraph, however, is subject to the condition
that if, at any time after the principal of the Bonds shall have been so
declared due and payable, and before any judgment or decree for the payment of
the moneys due shall have been obtained or entered as hereinafter provided,
there shall have been deposited with the Trustee a sum which, together with any
other amounts then held in the Bond Fund, is sufficient to pay all the
principal of the Bonds matured prior to such declaration and all matured
installments of interest (if any) upon all the Bonds, with interest on such
overdue installments of principal as provided in the Agreement, and the
reasonable expenses of the Trustee, and any and all other defaults known to the
Trustee (other than in the payment of principal of and interest on the Bonds
due and payable solely by reason of such declaration) shall have been made good
or cured to the satisfaction of the Trustee or provision deemed by the Trustee
to be adequate shall have been made therefor, then, and in every such case, the
holders of at least a majority in aggregate principal amount of the Bonds then
outstanding, by written notice to the City and to the Trustee, may, on behalf
of the holders of all the Bonds, rescind and annul such declaration and its
consequences and waive such default; provided that no such rescission and
annulment shall extend to or shall affect any subsequent default, or shall
impair or exhaust any right or power consequent thereon.

                 Section 7.02.  Institution of Legal Proceedings by Trustee.
In addition, if one or more of the Events of Default shall happen and be
continuing, the Trustee in its discretion may, and upon the written request of
the holders of not less than 25% in aggregate principal amount of the Bonds
then outstanding





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<PAGE>   56
and upon being indemnified to its satisfaction therefor shall, proceed to
protect or enforce its rights or the rights of the holders of Bonds under the
Law or under this Indenture, by a suit in equity or action at law, either for
the specific performance of any covenant or agreement contained herein, or in
aid of the execution of any power herein granted, or by mandamus or other
appropriate proceeding for the enforcement of any other legal or equitable
remedy as the Trustee shall deem most effectual in support of any of its rights
or duties hereunder.

                 Section 7.03.  Application of Moneys Collected by Trustee.
Any moneys collected by the Trustee on or after the occurrence of an Event of
Default shall be applied in the order following, at the date or dates fixed by
the Trustee and, in the case of distribution of such moneys on account of
principal (or premium, if any) or interest, upon presentation of the Bonds, and
stamping thereon the payment, if only partially paid, and upon surrender
thereof, if fully paid:

                          First:  To the payment of costs and expenses of
                 collection, just and reasonable compensation to the Trustee
                 for its own services and for the services of counsel, agents
                 and employees by it properly engaged and employed, and all
                 other expenses and liabilities incurred, and for advances made
                 pursuant to the provisions of this Indenture with interest on
                 all such advances at the rate then borne by the Bonds;
                 provided, that Available Amounts shall not be so applied when
                 a Credit Facility in the form of a letter of credit is then in
                 effect.

                          Second:  In case the principal of none of the Bonds
                 shall have become due and remains unpaid, to the payment of
                 interest in default in the order of the maturity thereof, such
                 payments to be made ratably and proportionately to the persons
                 entitled thereto without discrimination or preference, except
                 as specified in Section 6.02, and provided that no payment of
                 interest shall be made with respect to any Bonds registered in
                 the name of the City, the Borrower or the Credit Provider or
                 known by the Trustee to be registered in the name of any
                 nominee of the City, the Borrower or the Credit Provider,
                 until interest due on all Bonds not so registered shall have
                 been paid.

                          Third:  In case the principal of any of the Bonds
                 shall have become due by declaration or otherwise and remains
                 unpaid, first to the payment of principal of all Bonds then
                 due and unpaid, then to the payment of interest in default in
                 the order of maturity thereof, and then to the payment of the
                 premium thereon, if any and then to the payment of interest on
                 the overdue principal and interest at the rate then borne by
                 the Bonds; in every instance such payment to be made





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<PAGE>   57
                 ratably to the persons entitled thereto without discrimination
                 or preference, except as specified in Section 6.02, and 
                 provided that no payment of principal or premium or interest
                 shall be made with respect to any Bonds registered in the
                 name of the City, the Borrower or the Credit Provider or
                 known by the Trustee to be registered in the name of any
                 nominee of the City, the Borrower or the Credit Provider,
                 until all amounts due on all Bonds not so registered have been
                 paid.

                          Fourth:  To the Credit Provider as reimbursement for
                 amounts drawn under the Credit Facility, as certified by the
                 Credit Provider to the Trustee.

                 Section 7.04.  Effect of Delay or Omission to Pursue Remedy.
No delay or omission of the Trustee or of any holder of Bonds to exercise any
right or power arising from any default shall impair any such right or power or
shall be construed to be a waiver of any such default or acquiescence therein,
and every power and remedy given by this Article VII to the Trustee or to the
holders of Bonds may be exercised from time to time and as often as shall be
deemed expedient. In case the Trustee shall have proceeded to enforce any right
under this Indenture, and such proceedings shall have been discontinued or
abandoned because of waiver or for any other reason, or shall have been
determined adversely to the Trustee, then and in every such case the City, the
Trustee, the Credit Provider and the holders of the Bonds, severally and
respectively, shall be restored to their former positions and rights hereunder
in respect to the trust estate; and all remedies, rights and powers of the
City, the Trustee, the Credit Provider and the holders of the Bonds shall
continue as though no such proceedings had been taken.

                 Section 7.05.  Remedies Cumulative.  No remedy herein
conferred upon or reserved to the Trustee or to any holder of the Bonds is
intended to be exclusive of any other remedy, but each and every such remedy
shall be cumulative and shall be in addition to every other remedy given
hereunder or now or hereafter existing at law or in equity.

                 Section 7.06.  Covenant to Pay Bonds in Event of Default.  The
City covenants that, upon the happening of any Event of Default, the City will
pay to the Trustee upon demand, but only out of Revenues, for the benefit of
the holders of the Bonds, the whole amount then due and payable thereon (by
declaration or otherwise) for interest or for principal and premium, or both,
as the case may be, and all other sums which may be due hereunder or secured
hereby, including reasonable compensation to the Trustee, its agents and
counsel, and any expenses or liabilities incurred by the Trustee hereunder.  In
case the City shall fail to pay the same forthwith upon such demand, the
Trustee, in its own name and as trustee of an express trust, shall be entitled
to institute proceedings at law or in





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equity in any court of competent jurisdiction to recover judgment for the whole
amount due and unpaid, together with costs and reasonable attorneys' fees,
subject, however, to the condition that such judgment, if any, shall be limited
to, and payable solely out of, Revenues as herein provided and not otherwise.
The Trustee shall be entitled to recover such judgment as aforesaid, either
before or after or during the pendency of any proceedings for the enforcement
of this Indenture, and the right of the Trustee to recover such judgment shall
not be affected by the exercise of any other right, power or remedy for the
enforcement of the provisions of this Indenture.

                 Section 7.07.  Trustee Appointed Agent for Bondholders.  The
Trustee is hereby appointed the agent and attorney of the holders of all Bonds
outstanding hereunder for the purpose of filing any claims relating to the
Bonds.

                 Section 7.08.  Power of Trustee to Control Proceedings.  In
the event that the Trustee, upon the happening of an Event of Default, shall
have taken any action, by judicial proceedings or otherwise, pursuant to its
duties hereunder, whether upon its own discretion or upon the request of
holders of the Bonds, it shall have full power, in the exercise of its
discretion for the best interests of the holders of the Bonds, with respect to
the continuance, discontinuance, withdrawal, compromise, settlement or other
disposal of such action; provided, however, that the Trustee shall not, unless
there no longer continues an Event of Default hereunder, discontinue, withdraw,
compromise or settle, or otherwise dispose of any litigation pending at law or
in equity, if at the time there has been filed with it a written request signed
by the holders of at least a majority in principal amount of the Bonds
outstanding hereunder opposing such discontinuance, withdrawal, compromise,
settlement or other disposal of such litigation.

                 All rights of action under this Indenture or under any of the
Bonds secured hereby which are enforceable by the Trustee may be enforced by it
without the possession of any of the Bonds, or the production thereof at the
trial or other proceedings relative thereto, and any such suit, action or
proceeding instituted by the Trustee shall be brought in its name as Trustee of
an express trust for the equal and ratable benefit of the Bondholders, subject
to the provisions of this Indenture.

                 Section 7.09.  Limitation on Bondholders' Right to Sue.  No
holder of any Bond issued hereunder shall have the right to institute any suit,
action or proceeding at law or in equity, for any remedy under or upon this
Indenture, unless (a) such holder shall have previously given to the Trustee
written notice of the occurrence of an Event of Default hereunder; (b) the
holders of at least 25% in aggregate principal amount of all the Bonds then
outstanding shall have made written request upon the Trustee to exercise the
powers hereinbefore granted or to institute such action, suit or proceeding in
its own name; (c) said holders





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<PAGE>   59
shall have tendered to the Trustee reasonable indemnity against the costs,
expenses and liabilities to be incurred in compliance with such request; and
(d) the Trustee shall have refused or omitted to comply with such request for a
period of thirty (30) days after such written request shall have been received
by, and said tender of indemnity shall have been made to, the Trustee.

                 Such notification, request, tender of indemnity and refusal or
omission are hereby declared, in every case, to be conditions precedent to the
exercise by any holder of Bonds of any remedy hereunder; it being understood
and intended that no one or more holders of Bonds shall have any right in any
manner whatever by his or their action to enforce any right under this
Indenture, except in the manner herein provided, and that all proceedings at
law or in equity to enforce any provision of this Indenture shall be
instituted, had and maintained in the manner herein provided and for the equal
benefit of all holders of the outstanding Bonds (subject to the provisions of
Section 6.02 hereof).

                 The right of any holder of any Bond to receive payment of the
principal of (and premium, if any) and interest on such Bond out of Revenues,
as herein and therein provided, on and after the respective due dates expressed
in such Bond, or to institute suit for the enforcement of any such payment on
or after such respective dates, shall not be impaired or affected without the
consent of such holder, notwithstanding the foregoing provisions of this
Section or Section 7.08 or any other provision of this Indenture.

                 Section 7.10.  Limitation of Liability to Revenues.
Notwithstanding anything in this Indenture contained, the City shall not be
required to advance any moneys derived from the proceeds of taxes collected by
the City or by any governmental body or political subdivision of the State of
California or from any source of income of any governmental body or political
subdivision of the State of California or the City other than the Revenues, for
any of the purposes in this Indenture mentioned, whether for the payment of the
principal of or interest on the Bonds or for any other purpose of this
Indenture.  The Bonds are not general obligations of the City, and are payable
from and secured by the Revenues only.


                                  ARTICLE VIII

                         THE TRUSTEE AND THE REGISTRAR

                 Section 8.01.  Duties, Immunities and Liabilities of Trustee
and Registrar.  The Trustee and the Registrar shall, prior to an Event of
Default, and after the curing of all Events of Default which may have occurred,
perform such duties and only such duties as are specifically set forth in this
Indenture.  The Trustee shall, during the existence of any Event of Default





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(which has not been cured), exercise such of the rights and powers vested in it
by this Indenture, and use the same degree of care and skill in their exercise,
as prudent persons would exercise or use under the circumstances in the conduct
of their own affairs.

                 No provision of this Indenture shall be construed to relieve
the Trustee or the Registrar from liability for its own negligent action or its
own negligent failure to act, except that:

                 (a)      Prior to such an Event of Default hereunder and after
        the curing of all Events of Default which may have occurred,

                          (1)     the duties and obligations of the Trustee and
                 the Registrar, as the case may be, shall be determined solely
                 by the express provisions of this Indenture; the Trustee or
                 the Registrar, as the case may be, shall not be liable except
                 for the performance of such duties and obligations as are
                 specifically set forth in this Indenture; and no covenants or
                 obligations shall be implied into this Indenture which are
                 adverse to the Trustee and the Registrar, as the case may be;
                 and

                          (2)     in the absence of bad faith on the part of
                 the Trustee or the Registrar, as the case may be, the Trustee
                 and the Registrar may conclusively rely, as to the truth of
                 the statements and the correctness of the opinions expressed
                 therein, upon any certificate or opinion furnished to the
                 Trustee or the Registrar, as the case may be, conforming to
                 the requirements of this Indenture; but in the case of any
                 such certificate or opinion which by any provision hereof is
                 specifically required to be furnished to the Trustee or the
                 Registrar, as the case may be, the Trustee or the Registrar,
                 as the case may be, shall be under a duty to examine the same
                 to determine whether or not it conforms to the requirements of
                 this Indenture; and

                 (b)      At all times, regardless of whether or not any Event
        of Default shall exist,

                          (1)     the Trustee and the Registrar shall not be
                 liable for any error of judgment made in good faith by a
                 responsible officer or officers of the Trustee or the
                 Registrar unless it shall be proved that the Trustee or the
                 Registrar, as the case may be, was negligent in ascertaining
                 the pertinent facts; and

                          (2)     neither the Trustee nor the Registrar shall
                 be personally liable with respect to any action taken,
                 permitted or omitted by it in good faith and reasonably
                 believed by it to be authorized or within the





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<PAGE>   61
                 discretion or rights or power conferred upon it by this 
                 Indenture unless it shall be proved that the Trustee or the
                 Registrar, as the case may be, was negligent.

                 (c)      The Trustee may execute any of the trusts or powers
         hereof and perform the duties required of it hereunder by or through
         attorneys, agents or receivers, and shall be entitled to advice of
         counsel concerning all matters of trust and concerning its duties
         hereunder.

                 (d)      The Trustee shall not be bound to make any
         investigation into the facts of matters stated in any resolution,
         certificate, statement, instrument, opinion, report, notice, request,
         consent, order, approval, bond, or other paper or document, unless
         requested in writing to do so by the Borrower, any holder of Bonds or
         the City; provided, however, that if the payment within a reasonable
         time to the Trustee of the costs, expenses or liabilities likely to be
         incurred by it in connection with making such investigation shall be,
         in the sole opinion of the Trustee, not reasonably assured to the
         Trustee by the security afforded to it by the terms of this Indenture,
         the Trustee may require reasonable indemnity against such cost,
         expense or liability as a condition to proceeding with such
         investigation.  The reasonable expense of every such investigation
         shall be paid by the Borrower.

                 (e)      Notwithstanding any other provision of this Indenture
         or the Agreement, the Trustee shall not be charged with knowledge of
         any Event of Default under this Indenture or any failure by the
         Borrower to comply with the obligations of the Borrower set forth in
         the Agreement, except default under Section 6.1(a) of the Agreement or
         Sections 7.01(a) or 7.01(b) hereof, unless a Responsible Officer of
         the Trustee obtains actual knowledge of such Event of Default or
         failure to comply, as the case may be, which may be in the form of
         written notice delivered to the Trustee pursuant to Section 11.07.

                 None of the provisions contained in this Indenture shall
require the Trustee or Registrar to expend or risk its own funds or otherwise
incur individual financial liability in the performance of any of its duties or
in the exercise of any of its rights or powers.

      Section 8.02.  Right of Trustee and Registrar to Rely upon Documents, Etc.

                 (a)      The Trustee and the Registrar may rely and shall be
         protected in acting upon any resolution, certificate, statement,
         instrument, opinion, report, notice, request, consent, order, Bond,
         direction, demand, election or other paper or document believed by it
         to be genuine and to have been signed or presented by the proper party
         or parties;





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<PAGE>   62
                 (b)      Any notice, request, direction, election, order or
         demand of the City mentioned herein shall be sufficiently evidenced by
         an instrument signed in the name of the City by an Authorized City
         Representative, and any resolution of the City may be evidenced to the
         Trustee or the Registrar by a Certified Resolution;

                 (c)      The Trustee and the Registrar may consult with
         counsel (who may include counsel for the City or Bond Counsel) and the
         opinion or advice of such counsel shall be full and complete
         authorization and protection in respect of any action taken or
         suffered by it hereunder in good faith and in accordance with the
         opinion or advice of such counsel; and

                 (d)      Whenever in the administration of the trusts of this
         Indenture the Trustee or the Registrar shall deem it necessary or
         desirable that a matter be proved or established prior to taking or
         suffering any action hereunder, such matter (unless other evidence in
         respect thereof be herein specifically prescribed) may, in the absence
         of negligence or bad faith on the part of the Trustee or the
         Registrar, as the case may be, be deemed to be conclusively proved and
         established by a Certificate of the City; and such Certificate of the
         City shall, in the absence of negligence or bad faith on the part of
         the Trustee or the Registrar, as the case may be, be full warrant to
         the Trustee or the Registrar, as the case may be, for any action taken
         or suffered by it under the provisions of this Indenture upon the
         faith thereof.

                 Section 8.03.  Trustee and Registrar Not Responsible for
Recitals.  The recitals contained herein and in the Bonds shall be taken as the
statements of the City, and the Trustee and the Registrar assume no
responsibility for the correctness of the same except (with respect to the
Registrar) for the Certificate of Authentication thereon.  The Trustee and the
Registrar make no representations as to the validity or sufficiency of this
Indenture or of the Bonds.  The Trustee and the Registrar shall not be
accountable for the use or application by the City of any of the Bonds
authenticated or delivered hereunder or of the proceeds of such Bonds except to
the extent specifically provided in this Indenture.

                 Section 8.04.  Right of Trustee and Registrar to Acquire
Bonds.  The Trustee, the Registrar and their officers and directors may acquire
and hold, or become the pledgee of, Bonds and otherwise deal with the City in
the manner and to the same extent and with like effect as though it were not
Trustee or Registrar, as the case may be, hereunder.

                 Section 8.05.  Moneys Received by Trustee and Registrar to Be
Held in Trust.  Subject to the provisions of Section 10.03, all moneys received
by the Trustee and the Registrar shall, until





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<PAGE>   63
used or applied as herein provided, be held in trust for the purposes for which
they were received, but need not be segregated from other funds except to the
extent required by law or as otherwise provided herein.  Except to the extent
provided otherwise herein, any interest allowed on any such moneys shall be
deposited in the fund to which such moneys are credited.  Available Amounts and
amounts being aged to become Available Amounts, amounts received under any
Credit Facility and proceeds of any remarketing of Bonds shall not be
commingled with any other funds held by the Trustee hereunder.

                 Section 8.06.  Compensation and Indemnification of Trustee and
Registrar.  The Trustee and the Registrar shall be entitled to reasonable
compensation for all services rendered by it in the execution of the trusts
created and in the exercise and performance of any of the powers and duties
hereunder of the Trustee or the Registrar, as the case may be, which
compensation shall not be limited by any provision of law in regard to the
compensation of a trustee of an express trust, and the Agreement will require
the Borrower to pay or reimburse the Trustee or the Registrar, as the case may
be, upon its request for all expenses, disbursements and advances incurred or
made by the Trustee or the Registrar, as the case may be, in accordance with
any of the provisions of this Indenture (including the reasonable compensation
and the expenses and disbursements of its counsel and of all persons not
regularly in its employ) except any such expense, disbursement or advance as
may arise from its negligence or bad faith.  If any property, other than cash,
shall at any time be held by the Trustee or the Registrar, as the case may be,
subject to this Indenture, or any supplemental indenture, as security for the
Bonds, the Trustee or the Registrar, as the case may be, if and to the extent
authorized by a receivership, bankruptcy or other court of competent
jurisdiction or by the instrument subjecting such property to the provisions of
this Indenture as such security for the Bonds, shall be entitled (but not
required) to make advances for the purpose of preserving such property or of
discharging tax liens or other prior liens or encumbrances thereon.  The
Agreement will also require the Borrower to indemnify the Trustee or the
Registrar, as the case may be, for, and to hold it harmless against, any loss,
liability, expense or advance incurred or made without negligence or bad faith
on the part of the Trustee or the Registrar, as the case may be, arising out of
or in connection with the acceptance or administration of this trust, including
the costs and expenses of defending itself against any claim of liability in
the premises.  Notwithstanding the foregoing, prior to seeking indemnity the
Trustee shall make timely payments of principal of and interest on the Bonds
with moneys on deposit in the Bond Fund as provided herein, and shall
accelerate the payment of principal on the Bonds and draw on the Credit
Facility when required by this Indenture.  Subject to Section 7.03 hereof, the
rights of the Trustee to compensation for its services and to payment or
reimbursement for its expenses, disbursements, liabilities or advances shall
have priority over the Bonds in respect of all





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<PAGE>   64
property or funds held or collected by the Trustee as such and other funds held
in trust by the Trustee for the benefit of the holders of particular Bonds;
provided, however, that the Trustee shall have no claim against moneys drawn
under the Credit Facility for payment of such compensation or reimbursement.

                 Section 8.07.  Qualifications of Trustee and Registrar.  There
shall at all times be a trustee and a registrar hereunder which shall be
corporations or banking associations organized and doing business under the
laws of the United States or of a state thereof, authorized under such laws to
exercise corporate trust powers, having a combined capital and surplus of at
least Fifty Million Dollars ($50,000,000), subject to supervision or
examination by federal or state authority, and whose senior, unsecured debt
obligations, or whose parent or holding company's senior, unsecured debt
obligations, are continuously rated at least Baa3 or Prime3 by Moody's
Investors Service (so long as such Rating Agency maintains a rating on the
Bonds and on such Person, parent or holding company, as the case may be);
provided, however, that no Credit Provider shall be eligible to serve as
Trustee or Registrar so long as it is the provider of a Credit Facility
hereunder.  If such corporations or banking associations publish reports of
condition at least annually, pursuant to law or to the requirements of any
supervising or examining authority above referred to, then for the purposes of
this Section the combined capital and surplus of such corporations or banking
associations shall be deemed to be their combined capital and surplus as set
forth in their most recent reports of conditions so published.  In case at any
time the Trustee or the Registrar shall cease to be eligible in accordance with
the provisions of this Section, the Trustee or the Registrar, as the case may
be, shall resign immediately in the manner and with the effect specified in
Section 8.08.

                 Section 8.08.  Resignation and Removal of Trustee or Registrar
and Appointment of Successor Trustee or Registrar.  (a) The Trustee or
Registrar may at any time resign by giving written notice to the City and the
Borrower and by giving to the Bondholders notice either by publication of such
resignation, which notice shall be published at least once in a Qualified
Newspaper, or by mailing notice by first class mail to such Bondholders.  The
Trustee shall also mail a copy of any such notice of resignation to the Rating
Agencies.  Upon receiving such notice of resignation, the City, with the
consent of the Borrower, shall promptly appoint a successor trustee or
registrar, as the case may be, by an instrument in writing.  If no successor
trustee or registrar, as the case may be, shall have been so appointed and have
accepted appointment within thirty days after the giving of such notice of
resignation by the Trustee or Registrar, as the case may be, the resigning
trustee or registrar, as the case may be, may petition any court of competent
jurisdiction for the appointment of a successor trustee or registrar, as the
case may be, or any Bondholder who has been a bona fide holder of a Bond for at
least six months may, on





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behalf of himself and others similarly situated, petition any such court for
the appointment of a successor trustee or registrar, as the case may be.  Such
court may thereupon, after such notice, if any, as it may deem proper and may
prescribe, appoint a successor trustee or registrar, as the case may be.

                 (b)      In case at any time either of the following
shall occur:

                          (1)     the Trustee or Registrar shall cease to be
                 eligible in accordance with the provisions of Section 8.07 and
                 shall fail to resign after written request therefor by the
                 City or by any Bondholder who has been a bona fide holder of a
                 Bond for at least six months, or

                          (2)     the Trustee or Registrar shall become
                 incapable of acting, or shall be adjudged a bankrupt or
                 insolvent, or a receiver of the Trustee or Registrar or of its
                 property shall be appointed, or any public officer shall take
                 charge or control of the Trustee or Registrar or of its
                 property or affairs for the purpose of rehabilitation,
                 conservation or liquidation,

then, in any such case, the City may remove the Trustee or Registrar, as the
case may be, and, with the advice and consent of the Borrower, appoint a
successor trustee by an instrument in writing, or any such Bondholder may, on
behalf of itself and all others similarly situated, petition any court of
competent jurisdiction for the removal of the Trustee or Registrar, as the case
may be, and the appointment of a successor trustee or registrar, as the case
may be.  Such court may thereupon, after such notice, if any, as it may deem
proper and may prescribe, remove the Trustee or Registrar, as the case may be,
and appoint a successor trustee or registrar, as the case may be.

                 (c)      The City, in the absence of an Event of Default, with
the advice and consent of the Borrower, or the holders of a majority in
aggregate principal amount of the Bonds at the time outstanding may at any time
remove the Trustee or Registrar, as the case may be, and appoint a successor
trustee or registrar, as the case may be, by an instrument or concurrent
instruments in writing signed by the City or such Bondholders, as the case may
be.

                 (d)      Any resignation or removal of the Trustee or
Registrar, as the case may be, and appointment of a successor trustee or
registrar, as the case may be, pursuant to any of the provisions of this
Section shall become effective only upon acceptance of appointment by the
successor trustee or registrar, as the case may be, as provided in Section
8.09, and upon transfer of any Credit Facility to the successor Trustee.  The
successor Trustee or successor Registrar, as the case may be,





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shall mail written notice of its appointment to each Rating Agency.

                 Section 8.09.  Acceptance of Trust by Successor Trustee.  Any
successor trustee appointed as provided in Section 8.08 shall execute,
acknowledge and deliver to the City, the Borrower and to its predecessor
trustee an instrument accepting such appointment hereunder, and thereupon the
resignation or removal of the predecessor trustee shall become effective and
such successor trustee, without any further act, deed or conveyance, shall
become vested with all the rights, powers, trusts, duties and obligations of
its predecessor in the trusts hereunder, with like effect as if originally
named as Trustee herein; but, nevertheless, on the Written Request of the City
or the request of the successor trustee, the trustee ceasing to act shall
execute and deliver an instrument transferring to such successor trustee, upon
the trusts herein expressed, all the rights, powers and trusts of the trustee
so ceasing to act.  Upon request of any such successor trustee, the City shall
execute any and all instruments in writing necessary or desirable for more
fully and certainly vesting in and confirming to such successor trustee all
such rights, powers and duties.  Any trustee ceasing to act shall,
nevertheless, retain a lien upon all property or funds held or collected by
such trustee to secure the amounts due it as compensation, reimbursement,
expenses and indemnity afforded to it by Section 8.06.

                 No successor trustee shall accept appointment as provided in
this Section 8.09 unless at the time of such acceptance such successor trustee
shall be eligible under the provisions of Section 8.07.

                 Upon acceptance of appointment by a successor trustee as
provided in this Section, the City or such successor trustee shall give
Bondholders notice of the succession of such trustee to the trusts hereunder in
the manner prescribed in Section 8.08 for the giving of notice of resignation
of the Trustee.

                 Section 8.10.  Merger or Consolidation of Trustee or
Registrar.  Any corporation or banking association into which the Trustee may
be merged or with which it may be consolidated, or any corporation or banking
association resulting from any merger or consolidation to which the Trustee or
Registrar shall be a party, or any corporation or banking association
succeeding to the business of the Trustee or Registrar, shall be the successor
of the Trustee or Registrar hereunder without the execution or filing of any
paper or any further act on the part of any of the parties hereto, anything
herein to the contrary notwithstanding, provided that such successor trustee or
registrar shall be eligible under the provisions of Section 8.07.

                 Section 8.11.  Accounting Records and Reports.  The Trustee
and Registrar shall keep proper books of record and account in accordance with
trust accounting standards in which





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complete and correct entries shall be made of all transactions relating to the
receipt, investment, disbursement, allocation and application of the Revenues
and the proceeds of the Bonds.  To the extent the Borrower directs the Trustee
with respect to the investment of moneys in any fund or account, the Borrower
shall provide the Trustee with the records required by this Section 8.11.  Such
records shall specify the account or fund to which each investment (or portion
thereof) held by the Trustee is to be allocated and shall set forth, in the
case of each Investment Security, (a) its purchase price, (b) its value at
maturity or its sale price, as the case may be, (c) the amounts and dates of
any payments to be made with respect thereto and (d) such documentation and
evidence as is required to be obtained by the Borrower to establish that the
requirements of Article V of the Tax Certificate have been met.  Such records
shall be open to inspection by the City, the Borrower and the Credit Provider
and by any Bondholder at any reasonable time during regular business hours on
reasonable notice.  Upon request of the City, the Trustee shall furnish to the
City statements of all investments made by the Trustee and all funds and
accounts held by the Trustee.

                 Section 8.12.  Registrars.  The City, at the request of the
Borrower, shall appoint a registrar for the Bonds.  Each Registrar shall be a
bank, trust company or national banking association which meets the
qualifications of Section 8.07 hereof, willing and able to accept the office on
reasonable and customary terms and authorized by law to perform all the duties
imposed upon it hereby.  Each Registrar shall signify its acceptance of the
duties and obligations imposed upon it hereby by executing and delivering to
the City and the Trustee a written acceptance thereof.  The Registrar initially
appointed hereunder is the Trustee.

                 Section 8.13.  Special Bondholder Requests.  Upon receipt of a
written request from a person or entity stating that such person or entity is
the beneficial owner of Bonds, the Trustee shall send, to the address
designated by such beneficial owner:

                 (i)      at the time any notice is given to Bondholders
         pursuant to this Indenture, a copy of any such notice;

                (ii)      upon reasonable request and payment by such
         beneficial owner of processing and mailing expenses, a report
         specifying (A) the amount of Bonds then Outstanding, (B) a redemption
         history with respect to the Bonds which shall include redemption dates
         and redemption prices with respect to all redemptions prior to the
         date of such report, and (C) the current status of insurance coverage
         with respect to the Project (to the extent the Borrower has provided
         information with respect thereto); and





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<PAGE>   68
            (iii)         within fifteen (15) days after the occurrence of an
         Event of Default under Section 7.01(a) or Section 7.01(b) hereof or
         receipt by a Responsible Officer of the Trustee of actual knowledge of
         the occurrence of any other Event of Default, notice by Mail of any
         such Event of Default, unless such Event of Default is cured or waived
         prior to the giving of such notice.

                 Neither the City nor the Trustee shall be liable for any
failure by the Trustee to send any report or notice specified in this Section
8.14 to any beneficial owner, or any defect contained in any such report or
notice, and any such failure or defect shall not affect the sufficiency of any
proceedings under this Indenture.

                 Section 8.14.  Tax Certificate.  The Trustee covenants and
agrees that it will comply with all instructions of the Borrower given in
accordance with the Tax Certificate and will take any and all action as may be
necessary in accordance with such instructions.  The Trustee acknowledges
receipt of the Tax Certificate and acknowledges that the provisions of the Tax
Certificate are incorporated herein by reference as provided in Section 6.06.

                 Section 8.15.  Appointment of Separate or Co-Trustee.  It is
the purpose of this Indenture that there shall be no violation of any law of
any jurisdiction (including, without limitation, the law of the State of
California) denying or restricting the rights of banking corporations or
associations to transact business as trustees in such jurisdiction.  It is
recognized that in the event the Trustee shall not be permitted to, by reason
of litigation under this Indenture or the Agreement or the enforcement thereof
on default, or in the event that the Trustee deems that by reason of any laws
of any jurisdiction, it may not, exercise any of the powers, rights or remedies
herein granted to the Trustee or perform any of the duties or obligations
herein imposed on the Trustee or hold title to the properties or estates, in
trust, as herein granted, or take any action which may be desirable or
necessary in connection therewith, the Trustee shall have the power to appoint
an additional Person or Persons (which need not meet the eligibility
requirements set forth in Section 8.07) as separate or co-trustee.  The
following provisions are adapted to those ends.

                 In the event that the Trustee appoints an additional Person as
separate or co-trustee, each and every power, right, remedy, duty, obligation,
property or estate expressed by this Indenture to be exercised, incurred or
assumed by or vested in or conveyed to the Trustee with respect thereto shall
be exercisable, incurred or assumed by, vested in and conveyed to such separate
or co-trustee but only to the extent necessary to enable such separate or
co-trustee to exercise such powers, rights and remedies or perform such duties
and obligations, and only to the extent that the Trustee by the laws of any





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jurisdiction (including, without limitation, the State of California) is
incapable of exercising, incurring, assuming or being vested with or conveyed
such powers, rights, remedies, duties, obligations, properties or estates and
every covenant and obligation necessary to the exercise thereof by such
separate or co-trustee shall run to and be enforceable by the Trustee or such
separate or co-trustee, subject to all the provisions of this Indenture
including every provision relating to the conduct of, affecting the liability
of, or affording protection to, the Trustee.  Any power, right, remedy, duty or
obligation conferred or imposed upon the Trustee shall be conferred or imposed
upon and exercised or performed by the Trustee and such separate or co-trustee
jointly, except to the extent that under the law of any jurisdiction in which
any particular act or acts are to be performed (including, without limitation,
the holding of title to the Trust Estate) the Trustee shall be incompetent or
incapable to perform such act or acts, in which event the powers, rights,
remedies, duties and obligations shall be exercised or performed only by such
separate or co-trustee.  No power which pursuant to this Section 8.15 is
exercisable by any such separate or co-trustee may be exercised except jointly
with, or with the written consent of, the Trustee, and no appointment of, or
action by, any separate or co- trustee shall relieve the Trustee of any of its
obligations hereunder or otherwise affect any of the terms of this Indenture or
the interests of the holders of the Bonds in the Trust Estate.  The Trustee
shall give immediate written notice of the appointment of any separate or co-
trustee to the City and the Borrower, but shall not be required to give notice
of such appointment to the Bondholders.

                 Should any instrument in writing from the City be required by
the separate or co-trustee so appointed by the Trustee for more fully and
certainly vesting in and confirming to him or it any powers, rights, remedies,
duties, obligations, properties or estates hereunder, any and all such
instruments in writing shall, on request, if such instruments impose no
additional duties, responsibilities or liabilities on the City and do not
otherwise adversely affect the City, be executed, acknowledged and delivered by
the City at the expense of the Borrower.  Any notice, demand, request or other
instrument or writing given to the Trustee shall be deemed to have been given
to each of the separate and co-trustees as effectively as if given to each of
them.  In case any separate or co-trustee or a successor to either shall die,
become incapable of acting, resign or be removed, all the powers, rights,
remedies, duties, obligations and interests of such separate or co-trustee, so
far as permitted by law, shall vest in and be executed by the Trustee.  The
Trustee shall be entitled to remove any separate or co-trustee appointed by the
Trustee upon written notice to the City, the Borrower and such separate or
co-trustee.  The Trustee shall immediately remove any separate or co-trustee
appointed by it hereunder upon cessation of the conditions requiring such
appointment.





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<PAGE>   70
                                   ARTICLE IX

                      MODIFICATION OF INDENTURE, DOCUMENTS

                 Section 9.01.  Modification without Consent of Bondholders.
The City and the Trustee, without the consent of or notice to any Bondholders
but with the consent of the Credit Provider, from time to time and at any time,
and subject to the conditions and restrictions contained in this Indenture, may
enter into an indenture or indentures supplemental hereto, which indenture or
indentures thereafter shall form a part hereof; and the Trustee, without the
consent of or notice to any Bondholders but with the consent of the Credit
Provider, from time to time and at any time, may consent to a waiver of any
provision of or an amendment or modification to (herein collectively referred
to as an "Amendment") the Agreement, any Credit Facility or Credit Agreement or
any other document, instrument or agreement relating to the Project or the
security for the Bonds (herein collectively referred to as the "Documents"); in
each case for any one or more of the following purposes:

                 (a)      to add to the covenants and agreements of the City
         contained in this Indenture, or of the Borrower or the Credit Provider
         contained in any Document, other covenants and agreements thereafter
         to be observed, or to assign or pledge additional security for the
         Bonds, or to surrender any right or power herein or therein reserved
         to or conferred upon the City or the Borrower; provided, that no such
         covenant, agreement, assignment, pledge or surrender shall materially
         adversely affect the interests of the holders of the Bonds;

                 (b)      to make such provisions for the purpose of curing any
         ambiguity, inconsistency or omission, or of curing, correcting or
         supplementing any defective provision contained in this Indenture or
         any Document, or in regard to matters or questions arising under this
         Indenture or any Document, as the City may deem necessary or desirable
         and not inconsistent with this Indenture and which shall not
         materially adversely affect the interests of the holders of the Bonds;

                 (c)      to modify, amend or supplement this Indenture or any
         indenture supplemental hereto in such manner as to permit the
         qualification hereof or thereof under the Trust Indenture Act of 1939
         or any similar federal statute hereafter in effect, and, if they so
         determine, to add to this Indenture or any indenture supplemental
         hereto such other terms, conditions and provisions as may be permitted
         by said Trust Indenture Act of 1939 or similar federal statute, and
         which shall not adversely affect the interests of the holders of the
         Bonds;





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<PAGE>   71
                 (d)      to provide for any additional procedures, covenants
         or agreements necessary to maintain the exclusion of interest on the
         Bonds from gross income for federal income tax purposes;

                 (e)      to provide for, modify or eliminate a book-entry
         registration system for the Bonds;

                 (f)      to provide for the procedures required to permit any
         Bondholder to separate the right to receive interest on the Bonds from
         the right to receive principal thereof and to sell or dispose of such
         rights, as contemplated by Section 1286 of the Code;

                 (g)      to provide for the appointment of a co-trustee or the
         succession of a new Trustee, Registrar or Paying Agent;

                 (h)      to change Exhibit A to the Agreement in accordance
         with the provisions thereof and of the Tax Certificate and the
         Engineering Certificate;

                 (i)      to provide for a Credit Facility;

                 (j)      in connection with any other change which, in the
         judgment of the Trustee, which may be based upon an Opinion of
         Counsel, will not adversely affect the security for the Bonds or the
         exclusion from gross income of interest thereon for federal income tax
         purposes or otherwise materially adversely affect the holders of the
         Bonds; or

                 (k) to modify, alter, amend or supplement this Indenture or
         any Document in any other respect, including amendments which would
         otherwise be described in Section 9.02 hereof, if the effective date
         of such amendment is a date on which all Bonds affected thereby are
         subject to mandatory tender for purchase pursuant to Section 2.01(e)
         or if Notice by Mail of the proposed Amendment is given to Bondholders
         at least thirty (30) days before the effective date thereof and, on or
         before such effective date, the Bondholders have the right to demand
         purchase of their Bonds pursuant to Section 2.01(d) hereof.

                 Any supplemental indenture or Amendment authorized by the
provisions of this Section 9.01 may be executed by the City and the Trustee
following notice to the Borrower and receipt of the consent of the Credit
Provider, but without the consent of (or notice to) the holders of any of the
Bonds at the time outstanding; provided, however, that (i) the Trustee shall
not be obligated to enter into any such supplemental indenture which affects
the Trustee's own rights, duties or immunities under this Indenture or
otherwise in which case the Trustee may in its discretion, but shall not be
obligated to, enter into such supplemental indenture; and (ii) the Trustee
shall not enter into any such supplemental indenture or Amendment which affects
the





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rights or obligations of the Borrower hereunder or under the Agreement without
first obtaining the written consent of the Borrower.  The Trustee will give
notice (which shall be supplied to the Trustee by and at the expense of the
Borrower) of the provisions of any supplemental indenture authorized by the
provisions of this Section 9.01 to each Bondholder at its address as it appears
on the registration books of the Registrar and to the Rating Agencies.  Any
supplemental indenture or amendment to the Agreement or other document
permitted pursuant to this Section 9.01 may be approved by an Authorized City
Representative and need not be approved by resolution or other action of the
City Council of the City.

                 Section 9.02.  Modification with Consent of Bondholders.  With
the consent of the Credit Provider and the holders of not less than sixty
percent (60%) in aggregate principal amount of the Bonds at the time
outstanding, evidenced as provided in Section 11.06, (i) the City and the
Trustee may from time to time and at any time enter into an indenture or
indentures supplemental hereto for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of this Indenture
or of any supplemental indenture; or (ii) the Trustee may consent to any of the
matters for which its consent is required pursuant to Section 6.04 hereof,
including any amendment to or modification of the Agreement or any other
document relating to the Project or the security for the Bonds; provided,
however, that, except as provided in Section 9.01, no such amendment or
modification will have the effect of extending the time for payment or reducing
any amount due and payable by the Borrower pursuant to the Agreement without
the consent of all the holders of the Bonds; and that no such supplemental
indenture shall (1) extend the fixed maturity of any Bond or reduce the rate of
interest thereon or extend the time of payment of interest, or reduce the
amount of the principal thereof, or reduce any premium payable on the
redemption thereof, without the consent of the holder of each Bond so affected,
or (2) reduce the aforesaid percentage of holders of Bonds whose consent is
required for the execution of such supplemental indentures, or permit the
creation of any lien on the Revenues prior to or on a parity with the lien of
this Indenture, except as permitted herein, or permit the creation of any
preference of any Bondholder over any other Bondholder or deprive the holders
of the Bonds of the lien created by this Indenture upon the Trust Estate or the
pledge of any Credit Facility, without the consent of the holders of all the
Bonds then outstanding.  Nothing in this paragraph shall be construed as making
necessary the approval of any Bondholder of any supplemental indenture
permitted by the provisions of Section 9.01.

                 Upon receipt by the Trustee of a request by the City for the
execution of any such supplemental indenture or modification or amendment, and
upon the filing with the Trustee of evidence of the consent of the Credit
Provider and Bondholders, as aforesaid, the Trustee shall join with the City





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in the execution of such supplemental indenture or shall consent to such
modification or amendment, unless (i) such supplemental indenture affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise,
in which case the Trustee may in its discretion, but shall not be obligated to,
enter into such supplemental indenture; or (ii) such supplemental indenture or
such modification or amendment affects the rights or obligations of the
Borrower hereunder or under the Agreement, in which case the Trustee shall
enter into such supplemental indenture or shall consent to such modification or
amendment only if the Trustee has received the Borrower's written consent
thereto.

                 It shall not be necessary for the consent of the Bondholders
under this Section to approve the particular form of any proposed supplemental
indenture or modification or amendment, but it shall be sufficient if such
consent shall approve the substance thereof.

                 Promptly after the execution by the parties thereto of any
supplemental indenture or modification or amendment to the Agreement or other
document as provided in this Section, the Trustee shall mail a notice (which
shall be supplied to the Trustee by and at the expense of the Borrower),
setting forth in general terms the substance of such supplemental indenture or
such modification or amendment, to the Credit Provider, to each Bondholder at
the address contained in the bond register maintained by the Registrar and to
the Rating Agencies.  Any failure of the Trustee to give such notice, or any
defect therein, shall not, however, in any way impair or affect the validity of
any such supplemental indenture or such amendment.

                 Section 9.03.  Effect of Supplemental Indenture or Amendment.
Upon the execution of any supplemental indenture or any amendment to the
Agreement pursuant to the provisions of this Article IX, this Indenture or the
Agreement, as the case may be, shall be and be deemed to be modified and
amended in accordance therewith, and the respective rights, duties and
obligations under this Indenture and the Agreement of the City, the Trustee,
the Borrower and all holders of outstanding Bonds shall thereafter be
determined, exercised and enforced hereunder and under the Agreement subject in
all respects to such modifications and amendments, and all the terms and
conditions of any such supplemental indenture or amendment shall be part of the
terms and conditions of this Indenture or the Agreement, as the case may be,
for any and all purposes.

                 Section 9.04.  Required and Permitted Opinions of Counsel.
Subject to the provisions of Section 8.01, the Trustee may receive an Opinion
of Counsel as conclusive evidence that any supplemental indenture or amendment
executed pursuant to the provisions of this Article IX complies with the
requirements of this Article IX.  No supplemental indenture or amendment or
modification to the Agreement or any other document relating to the Project or
the Bonds shall be effective until the City and





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<PAGE>   74
the Trustee shall have received an opinion of Bond Counsel to the effect that
such supplemental indenture or such amendment or modification is permitted by
the Law and will not adversely affect the exclusion of interest on the Bonds
from gross income for federal income tax purposes.

                 Section 9.05.  Notation of Modification on Bonds; Preparation
of New Bonds.  Bonds authenticated and delivered after the execution of any
supplemental indenture pursuant to the provisions of this Article IX may bear a
notation, at the written request of the City, as to any matter provided for in
such supplemental indenture, and if such supplemental indenture shall so
provide, new Bonds, so modified as to conform, in the opinion of the Trustee
and the City, to any modification of this Indenture contained in any such
supplemental indenture, may be prepared by the City, authenticated by the
Trustee and delivered without cost to the holders of the Bonds then
outstanding, upon surrender for cancellation of such Bonds in equal aggregate
principal amounts.


                                   ARTICLE X

                                   DEFEASANCE

                 Section 10.01.  Discharge of Indenture.  If the entire
indebtedness on all Bonds outstanding shall be paid and discharged in any one
or more of the following ways:

                 (a)      by the payment of the principal of, and premium, if
         any, and interest on all Bonds outstanding, as and when the same
         become due and payable; or

                 (b)      by the delivery to the Registrar, for cancellation by
         it, of all Bonds outstanding;

and if all other sums payable hereunder by the City shall be paid and
discharged, then thereupon this Indenture shall cease, terminate and become
null and void, and thereupon the Trustee shall, upon Written Request of the
City, and upon receipt by the Trustee of a Certificate of the City and an
Opinion of Counsel, each stating that in the opinion of the signers all
conditions precedent to the satisfaction and discharge of this Indenture have
been complied with, forthwith execute proper instruments acknowledging
satisfaction of and discharging this Indenture.  The Trustee shall mail written
notice of such payment and discharge to the Rating Agencies.  The satisfaction
and discharge of this Indenture shall be without prejudice to the rights of the
Trustee to charge and be reimbursed by the Borrower for any expenditures which
it may thereafter incur in connection herewith.

                 Any Bond or Authorized Denomination thereof shall be deemed to
be paid within the meaning of this Indenture when





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(a) payment of the principal of and premium, if any, on such Bond or Authorized
Denomination thereof, plus interest thereon to the due date thereof (whether
such due date is by reason of maturity or upon redemption as provided herein)
either (i) shall have been made or caused to be made in accordance with the
terms thereof, or (ii) shall have been provided for by irrevocably depositing
with the Trustee in trust and irrevocably setting aside exclusively for such
payment (1) moneys sufficient to make such payment and/or (2) nonprepayable,
noncallable Government Obligations maturing as to principal and interest in
such amount and at such time as will insure the availability of sufficient
moneys (as verified by a nationally recognized certified public accountant) to
make such payment, and (b) all necessary and proper fees, compensation and
expenses of the Trustee pertaining to any such deposit shall have been paid or
the payment thereof provided for to the satisfaction of the Trustee; provided
that no Bond shall be deemed to be paid within the meaning of this Indenture
unless arrangements satisfactory to the Trustee shall have been made to assure
that Bonds tendered for purchase in accordance with Section 2.01(d) or (e)
hereof can be paid and redeemed from such moneys and/or Government Obligations
and the Trustee shall have received written confirmation from each Rating
Agency that such Rating Agency's then current rating on the Bonds will not be
lowered or withdrawn as a result of such provision.  The Trustee shall be
entitled to require an opinion of Bond Counsel to the effect that the
defeasance of the Bonds has been effected in accordance with the terms of this
Indenture and that such defeasance, in and of itself, will not adversely affect
the Tax-Exempt status of interest on the Bonds.  At such time as a Bond or
Authorized Denomination thereof shall be deemed to be paid hereunder, as
aforesaid, such Bond or Authorized Denomination thereof shall no longer be
secured by or entitled to the benefits of this Indenture, except for the
purposes of any such payment from such moneys or Government Obligations.  The
Trustee shall deliver to the Rating Agencies (at the expense of the Borrower) a
copy of each nationally recognized certified public accountant's verification
report and each opinion of Bond Counsel rendered pursuant to this paragraph.

                 The City or the Borrower or the Credit Provider may at any
time surrender to the Registrar for cancellation by it any Bonds previously
authenticated and delivered which the City or the Borrower or the Credit
Provider lawfully may have acquired in any manner whatsoever, and such Bonds,
upon such surrender and cancellation, shall be deemed to be paid and retired.

                 Section 10.02.  Discharge of Liability on Bonds.  Upon the
deposit with the Trustee, in trust, at or before maturity, of money or
securities in the necessary amount (as provided in Section 10.04) to pay or
redeem outstanding Bonds (whether upon or prior to their maturity or the
redemption date of such Bonds), provided that, if such Bonds are to be redeemed
prior to the maturity thereof, notice of such redemption shall have been given
as in Article IV provided or provision satisfactory to the





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Trustee shall have been made for giving such notice, all liability of the City
and the Borrower in respect of such Bonds shall cease, terminate and be
completely discharged, except that the City and Borrower shall remain liable
for such payment but only from, and the Bondholders shall thereafter be
entitled only to payment (without interest accrued thereon after such
redemption date or maturity date) out of, the money deposited with the Trustee
as aforesaid for their payment, subject, however, to the provisions of Sections
6.06 and 10.03; provided that no Bond shall be deemed to be paid within the
meaning of this Indenture unless arrangements satisfactory to the Trustee shall
have been made to assure that Bonds tendered for purchase in accordance with
Section 2.01(d) or (e) hereof can be paid and redeemed from such moneys and/or
Government Obligations.

                 Section 10.03.  Payment of Bonds after Discharge of Indenture.
Notwithstanding any provisions of this Indenture, and subject to applicable
laws of the State of California, any moneys deposited with the Trustee or any
Paying Agent, in trust for the payment of the principal of, or interest or
premium on, any Bonds remaining unclaimed for two years after the principal of
any of or all the outstanding Bonds has become due and payable (whether at
maturity or upon call for redemption or by declaration as provided in this
Indenture), shall then be repaid to the Borrower upon its Written Request, and
the holders of such Bonds shall thereafter be entitled to look only to the
Borrower for payment thereof, and all liability of the Trustee or any paying
agent with respect to such moneys shall thereupon cease; provided, however,
that before the repayment of such moneys to the Borrower as aforesaid, the
Trustee or paying agent, as the case may be, shall (at the request and cost of
the Borrower) first publish at least once in a Qualified Newspaper a notice, in
such form as may be deemed appropriate by the Borrower, in respect of the Bonds
so payable and not presented and in respect of the provisions relating to the
repayment to the Borrower of the moneys held for the payment thereof.  In the
event of the repayment of any such moneys to the Borrower as aforesaid, the
holders of the Bonds in respect of which such moneys were deposited shall
thereafter be deemed to be unsecured creditors of the Borrower for amounts
equivalent to the respective amounts deposited for the payment of such Bonds
and so repaid to the Borrower (without interest thereon).

                 Section 10.04.  Deposit of Money or Securities with Trustee.
Whenever in this Indenture it is provided or permitted that there be deposited
with or held in trust by the Trustee money or securities in the necessary
amount to pay or redeem any Bonds, the money or securities so to be deposited
or held may include money or securities held by the Trustee in the funds and
accounts established pursuant to this Indenture and shall be Available Amounts
constituting:

                 (a)      lawful money of the United States of America in an
        amount equal to the principal amount of such Bonds and all





                                          72
<PAGE>   77
         unpaid interest thereon to maturity, except that, in the case of Bonds
         which are to be redeemed prior to maturity and in respect of which
         notice of such redemption shall have been given as provided in Article
         IV or provision satisfactory to the Trustee shall have been made for
         the giving of such notice, the amount to be deposited or held shall be
         the principal amount or redemption price of such Bonds and all unpaid
         interest thereon to the redemption date; or

                 (b)      nonprepayable, noncallable Government Obligations the
         principal of and the interest on which when due will provide money
         sufficient to pay the principal or redemption price of and all unpaid
         interest to maturity, or to the redemption date, as the case may be,
         on the Bonds to be paid or redeemed, as such principal or redemption
         price and interest become due, provided that, in the case of Bonds
         which are to be redeemed prior to the maturity thereof, notice of such
         redemption shall have been given as provided in Article IV or
         provision satisfactory to the Trustee shall have been made for the
         giving of such notice;

provided, in each case, that (i) the Borrower shall furnish to the Trustee an
opinion of Bond Counsel to the effect that such deposit, in and of itself, will
not adversely affect the Tax-exempt status of interest on the Bonds and (ii)
the Trustee shall have been irrevocably instructed (by the terms of this
Indenture or by Written Request of the City) to apply such money to the payment
of such principal or redemption price and interest with respect to such Bonds.


                                   ARTICLE XI

                                 MISCELLANEOUS

                 Section 11.01.  Successors of City.  All the covenants,
stipulations, promises and agreements in this Indenture contained, by or on
behalf of the City, shall bind and inure to the benefit of its successors and
assigns, whether so expressed or not.  If any of the powers or duties of the
City shall hereafter be transferred by any law of the State of California, and
if such transfer shall relate to any matter or thing permitted or required to
be done under this Indenture by the City, then the body or official of the
State of California who shall succeed to such powers or duties shall act and be
obligated in the place and stead of the City as provided in this Indenture.

                 Section 11.02.  Limitation of Rights to Parties and
Bondholders.  Nothing in this Indenture or in the Bonds expressed or implied is
intended or shall be construed to give to any person other than the City, the
Trustee, the Borrower, any Credit Provider and the holders of the Bonds issued
hereunder any legal or equitable right, remedy or claim under or in respect of
this





                                          73
<PAGE>   78
Indenture or any covenant, condition or provision therein or herein contained;
and all such covenants, conditions and provisions are and shall be held to be
for the sole and exclusive benefit of the City, the Trustee, the Borrower, any
Credit Provider and the holders of the Bonds issued hereunder.

                 Section 11.03.  Waiver of Notice.  Whenever in this Indenture
the giving of notice by mail or otherwise is required, the giving of such
notice may be waived in writing by the person entitled to receive such notice
and in any such case the giving or receipt of such notice shall not be a
condition precedent to the validity of any action taken in reliance upon such
waiver.

                 Section 11.04.  Separability of Invalid Provisions.
In case any one or more of the provisions contained in this Indenture or in the
Bonds shall for any reason be held to be invalid, illegal or unenforceable in
any respect, such invalidity, illegality or unenforceability shall not affect
any other provision of this Indenture, but this Indenture shall be construed as
if such invalid or illegal or unenforceable provision had never been contained
herein.

                 Section 11.05.  Notices.  It shall be sufficient service of
any notice, request, complaint, demand or other paper on the City, the Trustee,
the Borrower, the Registrar, the Paying Agent, the Tender Agent, the Credit
Provider or the Remarketing Agent if the same shall be duly mailed by first
class mail, postage prepaid, addressed as follows:

         To the City:             City of Big Bear Lake
                                  39707 Big Bear Boulevard
                                  Big Bear Lake, CA  92315
                                  Attention:  City Manager

         with a copy to:          Best, Best & Krieger
                                  400 Mission Square
                                  3750 University Avenue
                                  Riverside, CA  92502
                                  Attention:  Scott C. Smith

         To the Trustee,          Harris Trust and Savings Bank
         the Registrar and        311 West Monroe Street, 12th Floor
         the Paying Agent:        Chicago, Illinois 60608
                                  Attention:  Indenture Trust Department

         To the Borrower:         Southwest Gas Corporation
                                  5241 Spring Mountain Road
                                  Las Vegas, NV  89102
                                  Attention:  Treasurer

         To the                   The address specified in the Credit
         Credit Provider:         Agreement.





                                          74
<PAGE>   79
         To the                   Smith Barney Shearson Inc.
         Remarketing Agent:       1345 Avenue of the Americas
                                  New York, New York  10105
                                  Attention:  Short-Term Tax Exempt
                                                   Trading Group

         with a copy to:          Lehman Brothers Inc.
                                  200 Vesey Street, 20th Floor
                                  New York, New York  10285

         To the                   Bank of Montreal Trust Company
         Tender Agent:            77 Water Street, 4th Floor
                                  New York, New York  10005
                                  Attention:  Corporate Trust Department

The City, the Trustee, the Borrower, the Registrar, the Paying Agent, the
Tender Agent, the Credit Provider or the Remarketing Agent may, by notice given
hereunder, designate any further or different addresses to which subsequent
notices, certificates or other communications shall be sent.  A duplicate copy
of each notice, certificate or other communication given hereunder by the City
or the Trustee to the other shall also be given to the Borrower and the Credit
Provider.  Unless otherwise requested by the City, the Trustee, the Borrower,
the Registrar, the Paying Agent, the Tender Agent, the Credit Provider or the
Remarketing Agent, any notice required to be given hereunder in writing may be
given by any form of telephonic or electronic transmission capable of making a
written record.

                 Any notice required to be given hereunder to the Rating
Agencies, as well as a duplicate copy of each notice given hereunder by the
Trustee to the holders of the Bonds, shall be given by the Trustee via
first-class mail to the following two Rating Agencies at the following
respective addresses (or at such different addresses as may be specified in
writing to the Trustee by the respective Rating Agencies):  Standard & Poor's
Corporation, 25 Broadway, New York, New York 10004, Attention: Financial
Institutions/LOC; Moody's Investors Service, 99 Church Street, 4th Floor, New
York, New York 10007, Attention: Structured Finance Group.

                 Section 11.06.  Evidence of Rights of Bondholders.  (a) Any
request, consent or other instrument required by this Indenture to be signed
and executed by Bondholders may be in any number of concurrent writings of
substantially similar tenor and may be signed or executed by such Bondholders
in person or by agent or agents duly appointed in writing.  Proof of the
execution of any such request, consent or other instrument or of a writing
appointing any such agent, shall be sufficient for any purpose of this
Indenture and shall be conclusive in favor of the Trustee, the Registrar and
the City if made in the manner provided in this Section.





                                          75
<PAGE>   80
                 (b)      The fact and date of the execution by any person of
any such request, consent or other instrument or writing may be proved by the
affidavit of a witness of such execution or by the certificate of any notary
public or other officer of any jurisdiction, authorized by the laws thereof to
take acknowledgments of deeds, certifying that the person signing such request,
consent or other instrument or writing acknowledged to him the execution
thereof.

                 (c)      The ownership of registered Bonds shall be proved by
the Bond register maintained by the Registrar pursuant to Section 2.04 hereof.
The fact and the date of execution of any request, consent or other instrument
may also be proved in any other manner which the Trustee may deem sufficient.
The Trustee may nevertheless, in its discretion, require further proof in cases
where it may deem further proof desirable.

                 (d)      Any request, consent or vote of the holder of any
Bond shall bind every future holder of the same Bond and the holder of any Bond
issued in exchange therefor or in lieu thereof, in respect of anything done or
suffered to be done by the Trustee or the City in pursuance of such request,
consent or vote.

                 (e)      In determining whether the holders of the requisite
aggregate principal amount of Bonds have concurred in any demand, request,
direction, consent or waiver under this Indenture, Bonds which are owned by the
City, by the Borrower or by any other direct or indirect obligor on the Bonds,
or by any person directly or indirectly controlling or controlled by, or under
direct or indirect common control with, the City, the Borrower, or any other
direct or indirect obligor on the Bonds, shall be disregarded and deemed not to
be outstanding for the purpose of any such determination, provided that, for
the purpose of determining whether the Trustee shall be protected in relying on
any such demand, request, direction, consent or waiver, only Bonds which the
Trustee knows to be so owned shall be disregarded.  Bonds so owned which have
been pledged in good faith may be regarded as outstanding for the purposes of
this subsection (e) if the pledgee shall certify to the Trustee the pledgee's
right to vote such Bonds and that the pledgee is not a person directly or
indirectly controlling or controlled by, or under direct or indirect common
control with, the City, the Borrower or any other direct or indirect obligor on
the Bonds.  In case of a dispute as to such right, any decision by the Trustee
taken upon the advice of counsel shall be full protection to the Trustee.
Solely for purposes of the limitation expressed in this paragraph (e), the
Credit Provider and the Borrower shall be deemed to be indirect obligors on the
Bonds, unless, in each case, it then owns all of the Bonds.

                 (f)      In lieu of obtaining any demand, request, direction,
consent or waiver in writing, the Trustee may call and hold a meeting of the
Bondholders upon such notice and in





                                          76
<PAGE>   81
accordance with such rules and regulations, including the right of the
Bondholders to be represented and vote by proxy, as the Trustee considers fair
and reasonable for the purpose of obtaining any such action.

                 Section 11.07.  Waiver of Personal Liability.  No City Council
member, officer, agent or employee of the City, and no officer, official, agent
or employee of the State of California or any department, board or agency of
the City or the State of California shall be individually or personally liable
for the payment of the principal of or premium or interest on the Bonds or be
subject to any personal liability or accountability by reason of the issuance
thereof; but nothing herein contained shall relieve any such member, officer,
agent or employee from the performance of any official duty provided by law or
by this Indenture.

                 Section 11.08.  Publication of Notices.  Any publication of
notice to be made under the provisions of this Indenture may be made in each
instance upon any business day of the week, and, except as provided in Section
10.03, no such publication shall be required if such notice is given by first
class mail to the holders of all Bonds then outstanding.

                 Section 11.09.  Prevailing Law.  This Indenture shall be
governed by and construed in accordance with the laws of the State of
California, except that the Trustee's obligations and duties hereunder shall be
governed by the construed in accordance with the laws of the State of New York.

                 Section 11.10.  Execution in Several Counterparts.  This
Indenture may be executed in any number of counterparts and each of such
counterparts shall for all purposes be deemed to be an original; and all such
counterparts, or as many of them as the City and the Trustee shall preserve
undestroyed, shall together constitute but one and the same instrument.

                 Section 11.11.  The Credit Provider.  All provisions hereof
regarding consents, approvals, directions, appointments or requests by the
Credit Provider shall be deemed not to require or permit such consents,
approvals, directions, appointments or requests by the Credit Provider and
shall be read as if the Credit Provider were not mentioned therein and as if no
Credit Facility were in effect during any time in which the Credit Provider is
in default under the Credit Facility, or after the Credit Facility shall at any
time for any reason cease to be valid and binding on the Credit Provider, or
shall be declared to be null and void, or while the Credit Provider is denying
further liability or obligation under the Credit Facility or after the Credit
Provider has rescinded, repudiated or terminated the Credit Facility.

                  All provisions herein relating to the Credit Provider shall
be of no force and effect if there is no Credit Facility or





                                          77
<PAGE>   82
Credit Agreement in effect and there are no Credit Provider Bonds and all
amounts owing to the Credit Provider under the Credit Agreement have been paid.





                                          78
<PAGE>   83
                 IN WITNESS WHEREOF, the City has caused this Indenture to be
signed in its name and its seal to be hereunto affixed and attested by its duly
authorized officers, respectively, and the Trustee, in token of its acceptance
of the trust created hereunder, has caused this Indenture to be signed in its
name by its duly authorized signatory, all as of the day and year first above
written.

                                                  CITY OF BIG BEAR LAKE


                                                  By _________________________
                                                               Mayor
[SEAL]

Attest:


____________________________
        City Clerk


                                                  HARRIS TRUST AND SAVINGS BANK,
                                                    as Trustee


                                                  By __________________________
                                                  Title:





                                          79
<PAGE>   84
                                   EXHIBIT A


                                 [FORM OF BOND]

$                                                                     No. ___

                            UNITED STATES OF AMERICA
                              STATE OF CALIFORNIA
                             CITY OF BIG BEAR LAKE
                      INDUSTRIAL DEVELOPMENT REVENUE BOND
                      (SOUTHWEST GAS CORPORATION PROJECT)
                                 1993 SERIES A


                 NEITHER THE FAITH AND CREDIT NOR THE TAXING POWER OF THE STATE
                 OF CALIFORNIA OR THE CITY OF BIG BEAR LAKE IS PLEDGED TO THE
                 PAYMENT OF THE PRINCIPAL OF, PREMIUM, IF ANY, OR INTEREST ON
                 THIS BOND, NOR IS SAID STATE OR SAID CITY IN ANY MANNER
                 OBLIGATED TO MAKE ANY APPROPRIATION FOR PAYMENT OF THIS BOND.
                 THIS BOND DOES NOT CONSTITUTE A DEBT OR LIABILITY OF THE STATE
                 OF CALIFORNIA, THE CITY OF BIG BEAR LAKE OR ANY PUBLIC AGENCY
                 THEREOF AND IS PAYABLE SOLELY FROM THE SOURCES HEREINAFTER
                 IDENTIFIED.

                      [For Variable Term Rate Periods Only

<TABLE>
<CAPTION>
                             Number of                      Mandatory                           Amount of
                               Days in                     Purchase and                       Interest Due
Interest                   Variable Term                     Interest                         for Variable
  Rate                        Segment                      Payment Date                       Term Segment
- --------                   -------------                   ------------                       ------------
 <S>                          <C>                             <C>                               <C>
 _____%                       _______                         _______                           $_______]
</TABLE>



<TABLE>
<CAPTION>
DATED DATE                                        MATURITY DATE                                       CUSIP
           <S>                                    <C>
           , 199_                                 December 1, 2028
- -----------                                                       
</TABLE>

REGISTERED HOLDER:

PRINCIPAL AMOUNT:

                 The CITY OF BIG BEAR LAKE, a municipal corporation and charter
city duly organized and existing under the laws and Constitution of the State
of California (the "City"), for value received, hereby promises to pay (but
only out of Revenues as hereinafter provided) to the registered holder
identified above or registered assigns, on the maturity date set forth above,
the principal amount set forth above and to pay (but only out of the sources
hereinafter provided) interest on the balance of said





                                         A-1
<PAGE>   85
principal amount from time to time remaining unpaid from and including the date
hereof until payment of said principal amount has been made or duly provided
for, at the rates and on the dates determined as described herein and in the
Indenture (as hereinafter defined), and to pay (but only out of the sources
hereinafter provided) interest on overdue principal and, to the extent
permitted by law, on overdue interest at the rate set forth in the Indenture,
except as the provisions hereinafter set forth with respect to redemption,
tender or acceleration prior to maturity may become applicable hereto.  The
principal of and premium, if any, on this Bond are payable in lawful money of
the United States of America at the principal office of ____________________,
or its successors and assigns, as paying agent (the "Paying Agent"), which
office is initially located at ______________________________.  Interest
payments on this Bond shall be made by the Paying Agent to the registered owner
hereof as of the close of business on the Record Date (as defined in the
Indenture) with respect to each Interest Payment Date (as defined in the
Indenture) and shall be paid (i) by bank check or draft mailed to the
registered owner hereof at its address as it appears on the registration books
of the Trustee, as registrar (the "Registrar"), on the Record Date or at such
other address as is furnished in writing by such registered owner to the
Registrar, or (ii) during any Rate Period (as defined in the Indenture) other
than a Term Rate Period (as defined herein), in immediately available funds (by
wire transfer or by deposit to the account of the registered owner of this Bond
if such account is maintained with the Paying Agent), but in respect of any
registered owner of any Bond or Bonds in a Daily Rate Period (as defined
herein) or a Weekly Rate Period (as defined herein), only to any registered
owner that owns Bonds in an aggregate principal amount of at least $1,000,000
on such Record Date, according to the instructions given by the registered
owner hereof to the Registrar or, if no such instructions have been provided as
of the Record Date, by check or draft mailed to the registered owner at such
registered owner's address as it appears as of the Record Date on the
registration books of the Registrar; except, in each case, that, if and to the
extent that there shall be a default in the payment of the interest due on such
Interest Payment Date, such defaulted interest shall be paid to the holders in
whose name any such Bonds are registered as of a special record date to be
fixed by the Trustee, notice of which shall be given to such owners not less
than ten (10) days prior thereto.  Notwithstanding the foregoing, interest in
respect of this Bond at any time it bears interest at a Variable Term Rate
shall be paid only upon presentation of this Bond to the Tender Agent.

                 This Bond is one of a duly authorized issue of bonds of the
City designated as the "City of Big Bear Lake Industrial Development Revenue
Bonds (Southwest Gas Corporation Project) 1993 Series A" (the "Bonds"), limited
in aggregate principal amount as provided in, and issued under and secured by,
an Indenture of Trust (herein called the "Indenture"), dated as of December 1,
1993, between the City and ____________________, or





                                         A-2
<PAGE>   86
its successors and assigns, as trustee (the "Trustee").  Reference is hereby
made to the Indenture and all indentures supplemental thereto for a description
of the rights thereunder of the registered owners of the Bonds, of the nature
and extent of the security, of the rights, duties and immunities of the Trustee
and of the rights and obligations of the City thereunder, to all of the
provisions of which Indenture the holder of this Bond, by acceptance hereof,
assents and agrees.

                 The Bonds are authorized to be issued pursuant to the
provisions of Ordinance No. 84-106 of the City, adopted May 9, 1984, as amended
and supplemented to the date hereof (the "Law").  The Bonds are special,
limited obligations of the City and, as and to the extent set forth in the
Indenture, are payable solely from, and secured by a pledge of and lien on, the
Revenues (as that term is defined in the Indenture), consisting primarily of
loan repayments made by Southwest Gas Corporation (the "Borrower") under the
terms of a Loan Agreement, dated as of December 1, 1993 (the "Agreement"),
between the City and the Borrower.  The Bonds are all issued under and equally
and ratably secured by and entitled to the benefits of the Indenture, including
the security of a pledge and assignment of certain revenues and receipts
derived by the City pursuant to the Agreement and any Credit Facility (as
described herein) and all receipts of the Trustee credited under the provisions
of the Indenture against such payments and from any other moneys held by the
Trustee under the Indenture for such purpose, and there shall be no other
recourse against the City or any property now or hereafter owned by it.  The
issuance of the Bonds shall not directly or indirectly or contingently obligate
the City, the State of California or any public agency to levy or to pledge any
form of taxation whatever therefor or to make any appropriation for their
payment.

                 In the manner hereinafter provided and subject to the
provisions of the Indenture, the term of this Bond will be divided into
consecutive Rate Periods during each of which this Bond shall bear interest at
either the Daily Rate (the "Daily Rate Period"), the Weekly Rate (the "Weekly
Rate Period"), the Term Rate (the "Term Rate Period") or the Variable Term Rate
or Rates (the "Variable Term Rate Period").  The Initial Rate Period for this
Bond shall be a Weekly Rate Period and during such Initial Rate Period this
Bond shall bear interest at Weekly Rates.  The subsequent Rate Period(s) and
interest rate(s) for this Bond shall be determined in accordance with the
Indenture.

                 This Bond shall bear interest from the Interest Payment Date
next preceding the date of registration hereof unless it is registered after a
Record Date and on or prior to the related Interest Payment Date, in which
event this Bond shall bear interest from such Interest Payment Date, or unless
this Bond is registered before the Record Date for the first Interest Payment
Date, in which event this Bond shall bear interest from the Dated Date;
provided, however, that if, as shown by the records of the





                                         A-3
<PAGE>   87
Paying Agent, interest on the Bonds shall be in default, Bonds issued in
exchange for Bonds surrendered for transfer or exchange shall bear interest
from the last date to which interest has been paid in full or duly provided for
on the Bonds, or, if no interest has been paid or duly provided for on the
Bonds, from the Dated Date.  Interest shall be computed, (a) in the case of a
Term Rate Period, on the basis of a 360-day year consisting of twelve 30-day
months, and (b) in the case of any other Rate Period, on the basis of a 365- or
366-day year, as appropriate, and the actual number of days elapsed.  The term
"Interest Payment Date" means (i) with respect to any Daily or Weekly Rate
Period, the first Business Day of each calendar month, (ii) with respect to any
Term Rate Period, the first day of the sixth month following the commencement
of the Term Rate Period and the first day of each sixth month thereafter, (iii)
with respect to any Variable Term Segment the Business Day next succeeding the
last day thereof, and (iv) with respect to any Rate Period other than a
Variable Term Rate Period, the Business Day succeeding the last day thereof.
The term "Business Day" means a day on which banks located in the cities in
which the Principal Offices of the Trustee, the Registrar, the Paying Agent,
the Tender Agent, the Remarketing Agent and any Credit Provider are located are
not required or authorized to be closed and on which the New York Stock
Exchange is not closed and, in the case of any action to be taken by the
Borrower, which is not a legal holiday in Las Vegas, Nevada.

                 This Bond shall be deliverable in the form of a registered
Bond without coupons (a) in the denominations of $5,000 or any integral
multiple thereof during any Term Rate Period; (b) in the denominations of
$100,000 and any integral multiple thereof during any Daily Rate Period or
Weekly Rate Period; and (c) in the denominations of $100,000 and any integral
multiple of $5,000 in excess of $100,000 during any Variable Term Rate Period
(such denominations being referred to herein as "Authorized Denominations").

                 The Borrower may, pursuant to the terms of the Indenture and
the Agreement, cause a Credit Facility to be in effect, which may be a letter
of credit, guarantee, standby purchase agreement, bond insurance or other
support arrangement or security, including mortgage bonds.

                 At the times and subject to the conditions set forth in the
Indenture, the Borrower may elect that the Bonds shall bear interest at an
interest rate, and for a period, different from those then applicable.  It is
not required that all Bonds bear interest at the same rate, provided, that
except as otherwise set forth in the Indenture, no more than one Rate Period
may apply to the Bonds at any one time.  Except as otherwise provided in the
Indenture, the Trustee shall give notice of any such adjustment of the interest
rate determination method to the owner of this Bond not less than 12 days (15
days if the then current Rate Period shall be a Term Rate Period or if the
Bonds are then held





                                         A-4
<PAGE>   88
in book-entry form as provided in the Indenture) prior to its effective date.

                 During each Daily Rate Period, this Bond shall bear interest
at the Daily Rate, determined in accordance with the provisions of the
Indenture by the Remarketing Agent on each Business Day for such Business Day.

                 During each Weekly Rate Period, this Bond shall bear interest
at the Weekly Rate, determined in accordance with the provisions of the
Indenture by the Remarketing Agent no later than the first day of such Weekly
Rate Period and thereafter no later than Tuesday of each week during such
Weekly Rate Period, unless any such Tuesday shall not be a Business Day, in
which event the Weekly Rate shall be determined by the Remarketing Agent no
later than the Business Day next succeeding such Tuesday.

                 During each Term Rate Period, this Bond shall bear interest at
the Term Rate, determined in accordance with the provisions of the Indenture by
the Remarketing Agent on a Business Day selected by the Remarketing Agent no
later than the effective date of such Term Rate Period.

                 During each Variable Term Rate Period, this Bond shall bear
interest during each Variable Term Segment for this Bond at the Variable Term
Rate for this Bond as described in the Indenture.  Each Variable Term Segment
and Variable Term Rate for this Bond shall be determined in accordance with the
provisions of the Indenture by the Remarketing Agent by agreement with the
purchaser of this Bond.  Each Variable Term Segment shall be a period of not
more than 230 days.

                 In no event shall the interest rate on this Bond be greater
than the Maximum Interest Rate (as defined in the Indenture).

                 During any Daily Rate Period, this Bond or portion hereof in
an Authorized Denomination shall be purchased at the option of the Holder
thereof on any Business Day at a purchase price equal to 100% of the principal
amount thereof plus accrued interest, if any, upon (a) delivery to the Tender
Agent at its Principal Office, by not later than 10:30 a.m., New York time, on
such Business Day, of an irrevocable notice by telephone or in person, which
states the principal amount of this Bond and the Purchase Date, and (b)
delivery of this Bond to the Tender Agent at its Principal Office, accompanied
by an instrument of transfer thereof, in a form satisfactory to the Tender
Agent, executed in blank by the owner thereof with the signature of such owner
guaranteed by a bank, trust company or member firm of the New York Stock
Exchange, at or prior to 3:00 p.m., New York time, on the Purchase Date
specified in such notice.





                                         A-5
<PAGE>   89
                 During any Weekly Rate Period, this Bond or any portion hereof
in an Authorized Denomination shall be purchased at the option of the Holder
thereof on any Business Day at a purchase price equal to 100% of the principal
amount thereof plus accrued interest, if any, upon (a) delivery to the Tender
Agent at its Principal Office of an irrevocable notice in writing, or by
telephone confirmed in writing, by 5:00 p.m., New York time, on any Business
Day, which states the principal amount of this Bond to be tendered for purchase
and the Purchase Date, which date shall not be prior to the seventh day next
succeeding the date of the delivery of such notice to the Tender Agent, and (b)
delivery of this Bond to the Tender Agent at its Principal Office, accompanied
by an instrument of transfer thereof, in a form satisfactory to the Tender
Agent, executed in blank by the owner thereof with the signature of such owner
guaranteed by a bank, trust company or member firm of the New York Stock
Exchange, at or prior to 3:00 p.m., New York time, on the Purchase Date
specified in such notice.

                 During any Term Rate Period, this Bond or any portion hereof
in an Authorized Denomination shall be purchased at the option of the Holder
thereof at the end of any Term Rate Period which is followed by a Term Rate
Period of equal duration at a purchase price equal to 100% of the principal
amount thereof plus accrued interest, if any, upon (a) delivery to the Tender
Agent at its Principal Office of an irrevocable notice in writing by 5:00 p.m.,
New York time, on any Business Day not less than seven days before the Purchase
Date, which states the principal amount of this Bond to be tendered for
purchase and (b) delivery of this Bond to the Tender Agent at its Principal
Office, accompanied by an instrument of transfer thereof, in a form
satisfactory to the Tender Agent, executed in blank by the owner thereof with
the signature of such owner guaranteed by a bank, trust company or member firm
of the New York Stock Exchange, at or prior to 3:00 p.m., New York time, on the
Purchase Date.

                 In each case in which a portion of this Bond is tendered for
purchase, both the portion so tendered and the untendered portion of this Bond
shall be in Authorized Denominations.

                 This Bond shall be subject to mandatory tender for purchase at
a purchase price equal to 100% of the principal amount thereof, plus accrued
interest, if any, to the Purchase Date:  (a) on the effective date of any
change in a Rate Period other than the effective date of a Term Rate Period
which was preceded by a Term Rate Period of the same duration; (b) during any
Variable Term Rate Period, on the day next succeeding the last day of any
Variable Term Segment applicable to this Bond; (c) on the second Business Day
preceding the termination of any Credit Facility unless the Trustee shall have
received, on or before the twentieth day prior to such termination date,
confirmation from each Rating Agency (as defined in the Indenture) that such
termination shall not result in the lowering





                                         A-6
<PAGE>   90
or withdrawal of such Rating Agency's then current rating on the Bonds; and (d)
on a day not more than 20 days after receipt by the Trustee from the Credit
Provider of a notice to the effect that the Credit Provider has not been
reimbursed for a drawing under the Credit Facility and that the amount
available to be drawn under the Credit Facility has not been reinstated.  This
Bond is also subject to mandatory tender for purchase on the day next
succeeding the last day of any Term Rate Period which ends prior to the day
originally established as the last day of such Term Rate Period, at the
principal amount thereof plus an amount equal to any premium which would have
been payable on such day had the Borrower directed redemption of this Bond as
described below.

                 Holders of Bonds bearing interest at Variable Term Rates which
are subject to mandatory purchase as described in clause (b) of the immediately
preceding paragraph may direct the Trustee not to purchase their Bonds, or
portions of the principal amount thereof (in which case both the portion to be
purchased and the portion directed not to be purchased must be of Authorized
Denominations), on the Purchase Date.  Any such direction shall be given by
delivering to the Tender Agent by telephone on or prior to 10:30 a.m., New York
time, on the first day of the applicable Variable Term Segment notice which (a)
specifies the numbers and denominations of Bonds owned by such Holder and (b)
directing the Trustee not to purchase such Bond or a portion thereof.

                 BY ACCEPTANCE OF THIS BOND, THE REGISTERED OWNER HEREBY AGREES
THAT IF THIS BOND IS TO BE PURCHASED AND IF MONEYS SUFFICIENT TO PAY THE
PURCHASE PRICE SHALL BE HELD BY THE TENDER AGENT ON THE DATE THIS BOND IS TO BE
PURCHASED, THIS BOND SHALL BE DEEMED TO HAVE BEEN PURCHASED AND SHALL BE
PURCHASED ACCORDING TO THE TERMS OF THE TENDER AGREEMENT, FOR ALL PURPOSES OF
THE INDENTURE, WHETHER OR NOT THIS BOND SHALL HAVE BEEN DELIVERED TO THE TENDER
AGENT, AND THE REGISTERED OWNER OF THIS BOND SHALL HAVE NO CLAIM HEREON, UNDER
THE INDENTURE OR OTHERWISE, FOR ANY AMOUNT OTHER THAN THE PURCHASE PRICE
HEREOF.

                 This Bond shall be redeemed in whole at any time at a
redemption price equal to the principal amount thereof plus accrued interest to
the redemption date upon prepayment by the Borrower of the payments due under
the Agreement in whole following the occurrence of certain extraordinary
events.

                 During any Term Rate Period, the Bonds are subject to
redemption at the option of the Borrower, in whole or in part, by lot, on any
date prior to the applicable first date for optional redemption as provided in
the Indenture, upon prepayment by the Borrower of the payments due under the
Agreement in whole or in part in connection with certain determinations, as set
forth in the Indenture, regarding the potential or actual loss of its right to
deduct for federal income tax purposes some or all of the interest payable
under the Agreement as a result of a change





                                         A-7
<PAGE>   91
in the use of the facilities financed with the proceeds of the Bonds, at the
applicable redemption price set forth in the Indenture.

                   The Bonds are subject to redemption upon optional prepayment
by the Borrower of amounts due under the Agreement, at the times, in the
manners and at the prices set forth in the Indenture with respect to Daily
Rate, Weekly Rate, Term Rate, or Variable Term Rate Periods.

                   The Bonds are subject to mandatory redemption prior to
maturity in whole, or in part, as provided in the Indenture at any time prior
to their maturity at a redemption price equal to the principal amount thereof
plus accrued interest thereon to the redemption date upon the occurrence of
certain events causing the interest on the Bonds to be includable in gross
income for federal income tax purposes, the existence of certain facts which,
but for such mandatory redemption, would cause interest on the Bonds to be
includable in gross income for federal income tax purposes, and events of
default under the Agreement.  The Bonds are also subject to mandatory
redemption at any time after the Completion Date (as defined in the Indenture)
at a redemption price equal to the principal amount thereof plus accrued
interest thereon to the redemption date, to the extent of excess proceeds.

                   Notice of any optional or mandatory redemption shall be
given by first-class mail not less than 15 days nor more than 60 days prior to
the date fixed for redemption to, among others, the holders of Bonds to be
redeemed at their addresses appearing on the registration books of the
Registrar.  If less than all of the Bonds are to be redeemed, the particular
Bonds to be redeemed shall be selected as provided in the Indenture.

                   Neither the members of the City Council nor any person
executing this Bond shall be liable personally on this Bond or be subject to
any personal liability or accountability by reason of the issuance thereof.  No
recourse shall be had for the payment of the principal of, premium, if any, or
interest on any of the Bonds or for any claim based thereon or upon any
obligation, covenant or agreement in the Indenture contained, against any past,
present or future City Council member or officer, employee or agent of the
City, or through the City, or any successor to the City, under any rule of law
or equity, statute or constitution or by the enforcement of any assessment or
penalty or otherwise, and all such liability of any such member, director,
officer, employee or agent as such is hereby expressly waived and released as a
condition of and in consideration for the execution of the Indenture and the
issuance of any of the Bonds.

                   The holder of this Bond shall have no right to enforce the
provisions of the Indenture or to institute action to enforce the covenants
therein, or to take any action with respect to any Event of Default (as defined
in the Indenture), or to institute,





                                         A-8
<PAGE>   92
appear in or defend any suit or other proceedings with respect thereto, except
as provided in the Indenture.  If an Event of Default occurs and is continuing,
the principal of all Bonds then outstanding issued under the Indenture may be
declared due and payable upon the conditions and in the manner and with the
effect provided in the Indenture.

                   Subject to the limitations and upon payment of the charges,
if any, provided in the Indenture, Bonds may be exchanged at the principal
office of the Registrar for a like aggregate principal amount of Bonds of like
tenor in Authorized Denominations.

                   This Bond is transferable by the registered holder hereof,
in person, or by its attorney duly authorized in writing, at the principal
office of the Registrar, but only in the manner, subject to the limitations and
upon payment of the charges provided in the Indenture, and upon surrender and
cancellation of this Bond.  Upon such transfer a new fully registered Bond or
Bonds of like tenor in Authorized Denominations, for the same aggregate
principal amount, will be issued to the transferee in exchange herefor.

                   The City, the Registrar, the Trustee, any Paying Agent and
any agent of the City, the Registrar, the Trustee or any Paying Agent may treat
the person in whose name this Bond is registered as the owner hereof for the
purpose of receiving payment as herein provided and for all other purposes,
whether or not this Bond be overdue, and neither the City, the Registrar, the
Trustee, any Paying Agent nor any such agent shall be affected by notice to the
contrary.

                   The Indenture contains provisions permitting the City and
the Trustee, with the consent of the holders of not less than 60% in aggregate
principal amount of the Bonds at the time outstanding, evidenced as in the
Indenture provided, to execute supplemental indentures adding any provisions
to, or changing in any manner, or eliminating any of the provisions of, the
Indenture; provided, however, that no such supplemental indenture shall (1)
extend the fixed maturity of this Bond or reduce the rate of interest hereon or
extend the time of payment of interest, or reduce the amount of the principal
hereof, or reduce any premium payable on the redemption hereof, without the
consent of the holder hereof, or (2) reduce the aforesaid percentage of holders
of Bonds whose consent is required for the execution of such supplemental
indentures, or permit the creation of any lien on the Trust Estate (as defined
in the Indenture) prior to or on a parity with the lien of the Indenture, or
permit the creation of any preference of any holder of Bonds over any other
holder of Bonds or deprive the holders of the Bonds of the lien created by the
Indenture upon the Revenues, without the consent of the holders of all Bonds
then outstanding.  The Indenture also contains provisions permitting the City
and the Trustee, without





                                         A-9
<PAGE>   93
the consent of any holders of the Bonds, to execute supplemental indentures for
certain purposes specified in the Indenture.

                   The Indenture prescribes the manner in which it may be
discharged and after which the Bonds shall no longer be secured by or entitled
to the benefits of the Indenture, except for the purposes of registration and
exchange of Bonds and of payment of the principal of and redemption premium, if
any, and interest on the Bonds as the same become due and payable, including a
provision that under certain circumstances the Bonds shall be deemed to be paid
if Government Obligations, as defined therein, maturing as to principal and
interest in such amounts and at such times as to insure the availability of
sufficient moneys to pay the principal of, premium, if any, and interest on the
Bonds and all necessary and proper fees, compensation and expenses of the
Trustee, shall have been deposited with the Trustee.

                   It is hereby certified that all of the conditions, things
and acts required to exist, to have happened and to have been performed
precedent to and in the issuance of this Bond do exist, have happened and have
been performed in due time, form and manner as required by the Law and by the
Constitution and statutes of the State of California and that the amount of
this Bond, together with all other indebtedness of the City, does not exceed
any limit prescribed by the Constitution or statutes of the State of
California.

                   This Bond shall not be entitled to any benefit under the
Indenture, or become valid or obligatory for any purpose, until the certificate
of authentication hereon endorsed shall have been signed by the Registrar or
the Tender Agent.

                   IN WITNESS WHEREOF, the City of Big Bear Lake has caused
this Bond to be executed in its name and on its behalf by the facsimile
signature of its Mayor and attested by the facsimile signature of its City
Clerk and its seal to be reproduced hereon, all as of the Dated Date set forth
above.


                                                   CITY OF BIG BEAR LAKE



                                                   By ____________________
[SEAL]                                                       Mayor


ATTEST:


_________________________
        City Clerk





                                         A-10
<PAGE>   94
                                   [Form of]

                         CERTIFICATE OF AUTHENTICATION

                 This Bond is one of the Bonds described in the
within-mentioned Indenture of Trust.

Date of Authentication:  _______________


HARRIS TRUST AND SAVINGS BANK,                BANK OF MONTREAL TRUST
  as Registrar                                  COMPANY, as Tender Agent

                                    OR

By ____________________________               By ___________________________
   Authorized Signatory                          Authorized Signatory


                                [ABBREVIATIONS]

                 The following abbreviations, when used in the inscription on
the face of the within bond and in the assignment below, shall be construed as
though they were written out in full according to applicable laws or
regulations.

<TABLE>
                   <S>            <C>
                   TEN COM--      as tenants in common

                   TEN ENT--      as tenants by the entireties

                   JT TEN--       as joint tenants with right of survivorship
                                  and not as tenants in common
</TABLE>

                   Additional abbreviations may also be used
                         though not in the above list.

                   UNIF GIFT/TRAN MIN ACT--_______      Custodian __________
                                              (Cust)               (Minor)
                                      Under Uniform Gifts/Transfer to Minors Act

                                      ___________________________________
                                                     (State)





                                         A-11
<PAGE>   95
                              [FORM OF ASSIGNMENT]

                 FOR VALUE RECEIVED the undersigned hereby sells, assigns and
transfers unto _______________________________________________________________
______________________________________________________________________________

                        (Please Print or Typewrite Name
                            and Address of Assignee)

(Insert Social Security or other Identifying Number of Assignee)
__________________________________________________ the within Bond and hereby
irrevocably constitutes and appoints ________________________________________ 
attorney to register the transfer of said Bond on the books kept for 
registration thereof, with full power of substitution in the premises.

Dated: __________________________
Signature: ______________________

SIGNATURE GUARANTEED:


___________________________________________
NOTICE:  Signature guarantee shall be made
         by a guarantor institution
         participating in the Securities
         Transfer Agents Medallion Program
         or in such other guarantee program
         acceptable to the Registrar.

_______________________________________________________________





                                         A-12

<PAGE>   1
                                                                   EXHIBIT 10.03








                              FINANCING AGREEMENT



                                    Between



                              CLARK COUNTY, NEVADA



                                      And



                           SOUTHWEST GAS CORPORATION




                         _____________________________

                         Dated as of September 1, 1992


                                  Relating to

                                  $130,000,000

                              Clark County, Nevada
                      Industrial Development Revenue Bonds
                          (Southwest Gas Corporation)
                                 1992 Series A
                                      and
                                 1992 Series B


<PAGE>   2
                              FINANCING AGREEMENT

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                      Page
<S>                                                                     <C>
PARTIES  . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . .   1
PREAMBLES  . . . . . . .  . . . . . . . . . . . . . . . . . . . . . .   1
</TABLE>


                                   ARTICLE I

                                  DEFINITIONS

<TABLE>
     <S>                                                               <C> 
     SECTION 1.1.  DEFINITION OF TERMS . . . . .  . . . . . . . . . .   2
     SECTION 1.2.  NUMBER AND GENDER  . . . . . . . . . . . . . . . .   2
     SECTION 1.3.  ARTICLES, SECTIONS, ETC  . . . . . . . . . . . . .   2

                                   ARTICLE II

                                REPRESENTATIONS

     SECTION 2.1.  REPRESENTATIONS OF THE ISSUER  . . . . . . . . . .   2
     SECTION 2.2.  REPRESENTATIONS OF THE COMPANY . . . . . . . . . .   3

                                  ARTICLE III

          CONSTRUCTION OF THE PROJECT; AMENDMENT OF THE FACILITIES;
                             ISSUANCE OF THE BONDS

     SECTION 3.1.  AGREEMENT TO CONSTRUCT THE PROJECT;
                     AMENDMENT OF THE FACILITIES  . . . . . . . . . .   4
     SECTION 3.2.  AGREEMENT TO ISSUE BONDS; APPLICATION OF
                     BOND PROCEEDS  . . . . . . . . . . . . . . . . .   5
     SECTION 3.3   DISBURSEMENTS FROM THE CONSTRUCTION FUND
                     AND COSTS OF ISSUANCE FUND . . . . . . . . . . .   5
     SECTION 3.4.  ESTABLISHMENT OF COMPLETION DATE;
                     OBLIGATION OF COMPANY TO COMPLETE  . . . . . . .   6
     SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS  . . . . . . . . . .   7

                                   ARTICLE IV

                    LOAN OF PROCEEDS; REPAYMENT PROVISIONS

     SECTION 4.1.  LOAN OF BOND PROCEEDS. . . . . . . . . . . . . . .   8
     SECTION 4.2.  REPAYMENT AND PAYMENT OF OTHER AMOUNTS
                     PAYABLE  . . . . . . . . . . . . . . . . . . . .   8
     SECTION 4.3.  UNCONDITIONAL OBLIGATION . . . . . . . . . . . . .   9
     SECTION 4.4.  ASSIGNMENT OF ISSUER'S RIGHTS  . . . . . . . . . .  10
     SECTION 4.5.  AMOUNTS REMAINING IN FUNDS . . . . . . . . . . . .  10
</TABLE>




                                       i
<PAGE>   3
                                                                            Page



                                   ARTICLE V

<TABLE>
<CAPTION>
                       SPECIAL COVENANTS AND AGREEMENTS

     <S>                                                               <C>
     SECTION 5.1.  RIGHT OF ACCESS TO THE FACILITIES AND
                     RECORDS . . . . . . . . . . . . . . . . . . . . . 10
     SECTION 5.2.  THE COMPANY'S MAINTENANCE OF ITS
                     EXISTENCE; ASSIGNMENTS. . . . . . . . . . . . . . 11
     SECTION 5.3.  NOTICE AND CERTIFICATES TO TRUSTEE. . . . . . . . . 12
     SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES; UTILITY
                     AND OTHER CHARGES; INSURANCE. . . . . . . . . . . 13
     SECTION 5.5.  QUALIFICATION IN NEVADA . . . . . . . . . . . . . . 14
     SECTION 5.6.  TAX EXEMPT STATUS OF BONDS  . . . . . . . . . . . . 14

                                   ARTICLE VI

                         EVENTS OF DEFAULT AND REMEDIES

     SECTION 6.1.  EVENTS OF DEFAULT   . . . . . . . . . . . . . . . . 15
     SECTION 6.2.  REMEDIES ON DEFAULT . . . . . . . . . . . . . . . . 15
     SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND
                     EXPENSES  . . . . . . . . . . . . . . . . . . . . 17
     SECTION 6.4.  NO REMEDY EXCLUSIVE   . . . . . . . . . . . . . . . 17
     SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE
                     WAIVER  . . . . . . . . . . . . . . . . . . . . . 17

                                  ARTICLE VII

                                  PREPAYMENT

     SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT
                     MONEYS  . . . . . . . . . . . . . . . . . . . . . 18
     SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS  . . . . . . . . . . 18
     SECTION 7.3.  MANDATORY PREPAYMENT  . . . . . . . . . . . . . . . 18
     SECTION 7.4.  AMOUNT OF PREPAYMENT  . . . . . . . . . . . . . . . 18
     SECTION 7.5.  NOTICE OF PREPAYMENT  . . . . . . . . . . . . . . . 19

                                 ARTICLE VIII

              NON-LIABILITY OF ISSUER; EXPENSES; INDEMNIFICATION

     SECTION 8.1.  NON-LIABILITY OF ISSUER   . . . . . . . . . . . . . 19
     SECTION 8.2.  EXPENSES  . . . . . . . . . . . . . . . . . . . . . 20
     SECTION 8.3.  INDEMNIFICATION . . . . . . . . . . . . . . . . . . 20

                                  ARTICLE IX

                                 MISCELLANEOUS

     SECTION 9.1.  NOTICES . . . . . . . . . . . . . . . . . . . . . . 21
     SECTION 9.2.  SEVERABILITY  . . . . . . . . . . . . . . . . . . . 21
</TABLE>

                                       ii
<PAGE>   4
<TABLE>
<CAPTION>
                                                                      Page
<S>                                                                    <C>
     SECTION 9.3.  EXECUTION OF COUNTERPARTS  . . . . . . . . . . . .  22
     SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS. . . . . . .  22
     SECTION 9.5.  GOVERNING LAW  . . . . . . . . . . . . . . . . . .  22
     SECTION 9.6.  AUTHORIZED COMPANY REPRESENTATIVE  . . . . . . . .  22
     SECTION 9.7.  TERM OF THE AGREEMENT  . . . . . . . . . . . . . .  22
     SECTION 9.8.  BINDING EFFECT . . . . . . . . . . . . . . . . . .  22
     SECTION 9.9.  THIRD-PARTY BENEFICIARY  . . . . . . . . . . . . .  22

TESTIMONIUM     . . . . . . . . . . . . . . . . . . . . . . . . . . .  23

SIGNATURES AND SEALS  . . . . . . . . . . . . . . . . . . . . . . . .  23
</TABLE>

EXHIBIT A      Description of the Facilities





                                      iii
<PAGE>   5
                              FINANCING AGREEMENT


          THIS FINANCING AGREEMENT, dated as of September 1, 1992 (this
"Agreement"), by and between CLARK COUNTY, NEVADA, a political subdivision of
the State of Nevada (the "Issuer"), and SOUTHWEST GAS CORPORATION, a
corporation organized and existing under the laws of the State of California
and qualified to do business as a foreign corporation under the laws of the
State of Nevada (the "Company"),

                              W I T N E S S E T H

          WHEREAS, the Issuer is authorized and empowered under the County
Economic Development Revenue Bond Law, Sections 244A.669 to 244A.763,
inclusive, of the Nevada Revised Statutes, as amended (the "Act"), to borrow
money and to issue bonds in accordance with the Act and to use the proceeds
thereof for the purpose of financing or refinancing all or part of the cost of
certain facilities, including the cost of extending, adding to, or improving
such facilities, and to make loans to any person, firm, corporation or other
industrial entity for the planning, design, construction, acquisition or
carrying out of any facilities in furtherance of the public purpose for which
the Issuer was created; and

          WHEREAS, pursuant to the Act, the Issuer has previously issued
$30,000,000 aggregate principal amount of Clark County, Nevada Variable Rate
Demand Industrial Development Revenue Bonds (Southwest Gas Corporation) Series
1985 (the "1985 Bonds") and $50,000,000 aggregate principal amount of Clark
County, Nevada Variable Rate Demand Industrial Development Revenue Bonds
(Southwest Gas Corporation) Series 1988 (the "1988 Bonds" and collectively with
the 1985 Bonds, the "Prior Bonds") for the purpose of financing and refinancing
certain real and personal properties, facilities, machinery and equipment for
the local furnishing of gas (the "Existing Facilities") for Southwest Gas
Corporation, a California corporation qualified to do business in the State of
Nevada (the "Company");

          WHEREAS, the Issuer proposes to issue its Clark County, Nevada
Industrial Development Revenue Bonds (Southwest Gas Corporation) 1992 Series A
and 1992 Series B (collectively, the "Bonds"), in the aggregate principal
amount of $130,000,000 upon the terms and conditions set forth in the Indenture
of Trust, of even date herewith (the "Indenture"), between the Issuer and the
Trustee, for the purposes, among others, of refunding the Prior Bonds and
financing the costs of the acquisition, construction, improvement and equipping
of certain additional real and personal properties, facilities, machinery and
equipment described in Exhibit "A" hereto (the "Project" and, collectively with
the Existing Facilities, the "Facilities"), which together qualify as a
"project" under the Act;
<PAGE>   6
          NOW, THEREFORE, in consideration of the premises and the respective
representations and covenants herein contained, the parties hereto agree as
follows


                                   ARTICLE I

                                  DEFINITIONS

          SECTION 1.1.  DEFINITION OF TERMS.  Unless the context otherwise
requires, the terms used in this Agreement shall have the meanings specified in
Section 1.01 of the Indenture, as originally executed or as the same may from
time to time be supplemented or amended as provided therein.

          SECTION 1.2.  NUMBER AND GENDER.  The singular form of any word used
herein, including the terms defined in Section 1.01 of the Indenture, shall
include the plural, and vice versa.  The use herein of a word of any gender
shall include all genders.

          SECTION 1.3.  ARTICLES, SECTIONS, ETC.  Unless otherwise specified,
references to Articles, Sections and other subdivisions of this Agreement are
to the designated Articles, Sections and other subdivisions of this Agreement
as originally executed.  The words "hereof," "herein," "hereunder" and words of
similar import refer to this Agreement as a whole.  The headings or titles of
the several articles and sections, and the table of contents appended to copies
hereof, shall be solely for convenience of reference and shall not affect the
meaning, construction or effect of the provisions hereof.


                                   ARTICLE II

                                REPRESENTATIONS

          SECTION 2.1.  REPRESENTATIONS OF THE ISSUER.  The Issuer makes the
following representations as the basis for its undertakings herein contained:

          (a) The Issuer is a political subdivision of the State of Nevada.
Under the provisions of the Act, the Issuer has the power to enter into the
transactions contemplated by this Agreement and to carry out its obligations
hereunder.  By proper action, the Issuer has been duly authorized to execute,
deliver and duly perform this Agreement.  To the extent the representations
contained in the immediately preceding two sentences relate to powers granted
to the Issuer under the Act, such representations are made in reliance on an
opinion of Bond Counsel.

          (b) To refund the Prior Bonds and finance the Project the Issuer will
issue the Bonds, which will mature, bear interest and be subject to redemption
as provided in the Indenture.




                                       2
<PAGE>   7
          (c) The Issuer has not pledged and will not pledge its interest in
this Agreement for any purpose other than to secure the Bonds under the
Indenture.

          (d) The Issuer is not in default under any of the provisions of the
laws of the State of Nevada which default would affect its existence or its
powers referred to in subsection (a) of this Section 2.1.

          (e) The Issuer has found and determined and hereby finds and
determines that all requirements of the Act with respect to the issuance of the
Bonds and the execution of this Agreement have been complied with and that
refunding the Prior Bonds and financing the Project by issuing the Bonds and
entering into this Agreement will be in furtherance of the purposes of the Act.

          (f) On August 18, 1992, the Issuer adopted its resolution approving
the issuance of the Bonds.

          (g) No member, officer or other official of the Issuer has any
interest whatsoever in this Agreement or in the transactions contemplated
hereby.

          SECTION 2.2.  REPRESENTATIONS OF THE COMPANY.  The Company makes the
following representations as the basis for its undertakings herein contained:

          (a) The Company is a corporation duly formed under the laws of the
State of California, is in good standing in the State of California, is
qualified to do business as a foreign corporation under the laws of the State
of Nevada and has the corporate power to enter into and has duly authorized, by
proper corporate action, the execution and delivery of this Agreement and all
other documents contemplated hereby to be executed by the Company.

          (b) Neither the execution and delivery of this Agreement, the
consummation of the transactions contemplated hereby, nor the fulfillment of or
compliance with the terms and conditions hereof, conflict with or result in a
breach of any of the terms, conditions or provisions of the Company's Articles
of Incorporation or by-laws or of any corporate actions or of any agreement or
instrument to which the Company is now a party or by which it is bound, or
constitute a default (with due notice or the passage of time or both) under any
of the foregoing, or result in the creation or imposition of any prohibited
lien, charge or encumbrance whatsoever upon any of the property or assets of
the Company under the terms of any instrument or agreement to which the Company
is now a party or by which it is bound.

          (c) The estimated cost of the Project is as set forth in the Tax
Certificate and has been determined in accordance with





                                       3
<PAGE>   8
sound engineering principles and certain other principles set forth in the Tax
Certificate.

          (d) The Facilities consist of those facilities described in Exhibit A
hereto, and in the Southwest Gas Corporation Engineering Certificate dated
[September ___], 1992 (the "Engineering Certificate"), which is hereby
incorporated by reference herein, and the Company shall make no changes to the
Facilities or to the operation thereof which would affect the qualification of
the Facilities under the Act or impair the Tax-exempt status of interest on the
Bonds.  In particular, the Company has complied and shall comply with all
requirements set forth in the Tax Certificate.  The Company intends to utilize
the Facilities as facilities for the local furnishing of gas until the
principal of, the premium, if any, and the interest on the Bonds shall have
been paid.

          (e) The Company has and will have title to the Facilities, and all
necessary easements to install the Project, sufficient to carry out the
purposes of this Agreement.

          (f) At the time of submission of an application to the Issuer for
financial assistance in connection with the Project and on the dates on which
the Issuer took action on such application, permanent financing for the Project
had not otherwise been obtained or arranged.

          (g) All certificates, approvals, permits and authorizations with
respect to the construction of the Project of agencies of applicable local
governments, the States of Nevada and California and the federal government
have been obtained or will be obtained in the normal course of business.


                                  ARTICLE III

           CONSTRUCTION OF THE PROJECT; AMENDMENT OF THE FACILITIES;
                             ISSUANCE OF THE BONDS

          SECTION 3.1.  AGREEMENT TO CONSTRUCT THE PROJECT; AMENDMENT OF THE
FACILITIES.  The Company agrees that it will acquire, construct and install, or
complete the acquisition, construction and installation of the Project, and
will acquire, construct and install all other facilities and real and personal
property deemed necessary for the operation of the Project, substantially in
accordance with the plans and specifications prepared therefor by the Company
and approved by the Issuer, including any and all supplements, amendments and
additions or deletions thereto or therefrom, it being understood that the
approval of the Issuer shall not be required for changes in such plans and
specifications which do not alter the purpose and description of the Project as
set forth in Exhibit A hereto.  The Company further agrees to proceed with due
diligence to complete the Project within three years from the date hereof.





                                       4
<PAGE>   9
          In the event that the Company desires to amend or supplement the
Facilities, and such amendment or supplement alters the purpose or description
of the Facilities as described in Exhibit A hereto, and the Issuer approves of
such amendment or supplement, the Issuer will enter into, and will instruct the
Trustee to consent to, such amendment or supplement upon receipt of:

     (i) a certificate of the Authorized Company Representative describing in
detail the proposed changes and stating that they will not have the effect of
disqualifying the Facilities as a facility that may be financed pursuant to the
Act;

(ii) a copy of the proposed form of amended or supplemented Exhibit A hereto;
and

   (iii) an opinion of Bond Counsel that such proposed changes will not affect
the Tax.exempt status of interest on any of the Bonds.

          SECTION 3.2.  AGREEMENT TO ISSUE BONDS; APPLICATION OF BOND PROCEEDS.
To provide funds to refund the Prior Bonds and finance the Project as provided
in Section 4.1 hereof, the Issuer agrees that it will issue under the
Indenture, sell and cause to be delivered to the purchasers thereof, the Bonds,
bearing interest and maturing as provided in the Indenture.  The Issuer will
thereupon deposit the proceeds received from the sale of the Bonds as provided
in the Indenture.

          SECTION 3.3 DISBURSEMENTS FROM THE CONSTRUCTION FUND AND COSTS OF
ISSUANCE FUND.  (a) The Company will authorize and direct the Trustee, upon
compliance with Section 3.03 of the Indenture, to disburse the moneys in the
Construction Fund to or on behalf of the Company only for the following
purposes, subject to the provisions of Section 5.6 hereof:

     (i) Payment to the Company of such amounts, if any, as shall be necessary
to reimburse the Company in full for all advances and payments made by it, at
any time prior to or after the delivery of the Bonds, in connection with (1)
the preparation of plans and specifications for the Project (including any
preliminary study or planning of the Project or any aspect thereof), and (2)
subject to any limitation imposed by paragraph (vii) hereof, the acquisition,
construction and installation of the Project.

    (ii) Payment for labor, services, materials and supplies used by or
furnished to the Company to improve the site and to acquire and construct the
Project, as provided in the plans, specifications and work orders therefor;
payment of the costs of acquiring, constructing and installing utility services
or other related facilities; payment of the costs of acquiring all real and
personal property deemed necessary to construct the Project; and





                                       5
<PAGE>   10
payment of the miscellaneous expenses incidental to any of the foregoing items.

   (iii) Payment of the fees, if any, of architects, engineers, legal counsel
and supervisors expended in connection with the acquisition and construction of
the Project.

    (iv) Payment of assessments and other charges, if any, that may become
payable during the Construction Period with respect to the Project, or
reimbursement thereof, if paid by the Company.

     (v) Payment of expenses incurred in seeking to enforce any remedy against
any contractor or subcontractor in respect of any default under a contract
relating to the acquisition, construction or installation of the Project.

    (vi) Interest paid during the Construction Period and properly chargeable
to the capital account of the Project.

   (vii) Payment of any other Costs of the Project permitted by the Engineering
Certificate and the Tax Certificate (but not including any Costs of Issuance).

          (b) All moneys remaining in the Construction Fund after the
Completion Date and after payment or provision for payment of all other items
provided for in subsection (a) of this Section shall be used in accordance with
Section 3.03 of the Indenture.

          (c) Each of the payments referred to in subsection (a) of this
Section shall be made upon receipt by the Trustee of a written requisition in
the form prescribed by Section 3.03 of the Indenture, signed by the Authorized
Company Representative.

          (d) The Company will authorize and direct the Trustee, upon
compliance with Section 3.04 of the Indenture, to disburse the moneys in the
Costs of Issuance Fund to or on behalf of the Company only for Costs of
Issuance of the 1992 Series B Bonds, subject to the provisions of Section 5.6
hereof.  Each of the payments referred to in this Section 3.3(d) shall be made
upon receipt by the Trustee of a written requisition in the form prescribed by
Section 3.04 of the Indenture, signed by the Authorized Company Representative.

          SECTION 3.4.  ESTABLISHMENT OF COMPLETION DATE; OBLIGATION OF COMPANY
TO COMPLETE.  As soon as the Project is completed, the Authorized Company
Representative, on behalf of the Company, shall evidence the Completion Date by
providing a certificate to the Trustee and the Issuer stating the Cost of the
Project and further stating that (i) construction of the Project has been
completed substantially in accordance with the plans, specifications and work
orders therefor, and all labor, services, materials and supplies used in
construction have been paid for,




                                       6
<PAGE>   11
and (ii) all other facilities necessary in connection with the Project have
been acquired, constructed and installed in accordance with the plans and
specifications and work orders therefor and all costs and expenses incurred in
connection therewith have been paid.  Notwithstanding the foregoing, such
certificate may state that it is given without prejudice to any rights of the
Company against third parties for the payment of any amount not then due and
payable which exist at the date of such certificate or which may subsequently
exist.

          At the time such certificate is delivered to the Trustee, moneys
remaining in the Construction Fund, including any earnings resulting from the
investment of such moneys, shall be used as provided in Section 3.03 of the
Indenture.  The Company shall pay to the Trustee for deposit in the Surplus
Account an amount which, together with amounts transferred from the
Construction Fund to such account pursuant to Section 3.03 of the Indenture,
shall be sufficient to redeem 1992 Series B Bonds in Authorized Denominations.

          In the event the moneys in the Construction Fund available for
payment of the Cost of the Project should be insufficient to pay the costs
thereof in full, the Company agrees to pay directly, or to deposit in the
Construction Fund moneys sufficient to pay, any costs of completing the Project
in excess of the moneys available for such purpose in the Construction Fund.
The Issuer makes no express or implied warranty that the moneys deposited in
the Construction Fund and available for payment of the Cost of the Project,
under the provisions of this Agreement, will be sufficient to pay all the
amounts which may be incurred for such Cost.  The Company agrees that if, after
exhaustion of the moneys in the Construction Fund, the Company should pay, or
deposit moneys in the Construction Fund for the payment of, any portion of the
Cost of the Project pursuant to the provisions of this Section, it shall not be
entitled to any reimbursement therefor from the Issuer, from the Trustee or
from the holders of any of the Bonds, nor shall it be entitled to any
diminution of the amounts payable under Section 4.2 hereof.

          SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS.  Any moneys in any fund
held by the Trustee shall, at the written request of the Authorized Company
Representative, be invested or reinvested by the Trustee as provided in the
Indenture, subject to Section 5.6 hereof.  Such investments shall be held by
the Trustee and shall be deemed at all times a part of the fund from which such
investments were made, and the interest accruing thereon, and any profit or
loss realized therefrom, except as otherwise provided in the Indenture, shall
be credited or charged to such fund.





                                       7
<PAGE>   12
                                   ARTICLE IV

                     LOAN OF PROCEEDS; REPAYMENT PROVISIONS

          SECTION 4.1.  LOAN OF BOND PROCEEDS.  The Issuer covenants and
agrees, upon the terms and conditions in this Agreement, to make a loan to the
Company for the purpose of refunding the Prior Bonds and financing the Project.
Pursuant to said covenant and agreement, the Issuer will issue the Bonds upon
the terms and conditions contained in this Agreement and the Indenture and will
cause the Bond proceeds to be applied as provided in Article III of the
Indenture.  Such proceeds shall be disbursed as provided in Section 3.02 of the
Indenture.

          SECTION 4.2.  REPAYMENT AND PAYMENT OF OTHER AMOUNTS PAYABLE.  The
Company agrees to make the payments required by subsections (a) through (d) of
this Section as Repayment Installments on the loan to the Company from Bond
proceeds pursuant to Section 4.1 hereof.

          (a)  The Company covenants and agrees to pay to the Trustee as a
Repayment Installment on such loan, not later than each date provided in or
pursuant to the Indenture for the payment of principal (whether at maturity or
upon redemption or acceleration) of, premium, if any, and/or interest on the
Bonds, until the principal of, premium, if any, and interest on the Bonds shall
have been fully paid or provision for the payment thereof shall have been made
in accordance with the Indenture, in immediately available funds, for deposit
in the Bond Fund, a sum equal to the amount payable on such interest or
principal payment or redemption or acceleration date as principal of (whether
at maturity or upon redemption or acceleration), premium, if any, and interest
upon the Bonds as provided in the Indenture.

          Each payment pursuant to this Section 4.2(a) shall at all times be
sufficient to pay the total amount of interest and principal (whether at
maturity or upon redemption or acceleration) and premium, if any, payable on
the Bonds on the date of payment of principal or interest, as the case may be;
provided that any amount held by the Trustee in the Bond Fund on any due date
for a Repayment Installment hereunder shall be credited against the installment
due on such date to the extent available for such purpose; and provided further
that, subject to the provisions of this paragraph, if at any time the Company
determines that amounts held by the Trustee in the Bond Fund are sufficient to
pay all of the principal of and interest and premium, if any, on the Bonds as
such payments become due, the Company shall be relieved of any obligation to
make any further payments under the provisions of this Section.
Notwithstanding the foregoing, if on any date the amount held by the Trustee in
the Bond Fund is insufficient to make any required payments of principal of
(whether at maturity or upon redemption or acceleration) and interest and
premium, if any, on the Bonds as such payments become due, the Company shall
forthwith pay such deficiency as a Repayment Installment hereunder.





                                       8
<PAGE>   13
          (b) The Company also agrees to pay to the Trustee until the principal
of, premium, if any, and interest on the Bonds shall have been fully paid or
provision for the payment thereof shall have been made as required by the
Indenture, (i) the annual fee of the Trustee for its ordinary services rendered
as trustee, and its ordinary expenses incurred under the Indenture, as and when
the same become due, (ii) the reasonable fees, charges and expenses of the
Trustee, as provided in the Indenture, as and when the same become due, (iii)
the cost of printing any Bonds required to be furnished by the Issuer, and (iv)
any amounts required to be deposited in the Rebate Fund to comply with the
provisions of Section 5.6 hereof.  The Company will also pay reasonable fees,
charges and expenses of the Trustee as required by the Indenture following
provision for payment of the Bonds.

          (c) The Company also agrees to pay, within sixty (60) days after
receipt of request for payment thereof, all expenses required to be paid by the
Company under the terms of the Bond Purchase Agreement, and all fees and
reasonable expenses of the Issuer related to issuance of the Bonds or the
interpretation, enforcement or amendment of this Agreement or the Indenture
which are not otherwise required to be paid by the Company under the terms of
this Agreement; provided that the Issuer shall have obtained the prior written
approval of the Authorized Company Representative for any expenditures other
than those provided for herein or in the Bond Purchase Agreement.

          (d) In the event the Company should fail to make any of the payments
required by subsections (a) through (c) of this Section in respect of any
Series of Bonds, such payments shall continue as obligations of the Company
until such amounts shall have been fully paid.  The Company agrees to pay
overdue payments under subsection (a) of this Section, together with interest
thereon until paid, to the extent permitted by law, at the rate of interest per
annum borne by the Series of Bonds.

          SECTION 4.3.  UNCONDITIONAL OBLIGATION.  The obligations of the
Company to make the payments required by Section 4.2 hereof and to perform and
observe the other agreements on its part contained herein shall be absolute and
unconditional, irrespective of any defense or any rights of set-off, recoupment
or counterclaim it might otherwise have against the Issuer; and during the term
of this Agreement, the Company shall pay absolutely net the payments to be made
on account of the loan as prescribed in Section 4.2 and all other payments
required hereunder, free of any deductions and without abatement, diminution or
set-off.  Until such time as the principal of, premium, if any, and interest on
the Bonds shall have been fully paid, or provision for the payment thereof
shall have been made as required by the Indenture, the Company (i) will not
suspend or discontinue any payments provided for in Section 4.2 hereof; (ii)
will perform and observe all of its other covenants contained in this
Agreement; and (iii) except as provided in Article VIII hereof, will not
terminate this





                                       9
<PAGE>   14
Agreement for any cause, including, without limitation, failure to complete the
Project, the occurrence of any act or circumstances that may constitute failure
of consideration, destruction of or damage to the Facilities, commercial
frustration of purpose, any change in the tax or other laws of the United
States of America or of the State of Nevada or any political subdivision of
either of these, or any failure of the Issuer or the Trustee to perform and
observe any covenant, whether express or implied, or any duty, liability or
obligation arising out of or connected with this Agreement or the Indenture,
except to the extent permitted by this Agreement.

          SECTION 4.4.  ASSIGNMENT OF ISSUER'S RIGHTS.  As security for the
payment of the Bonds, the Issuer will assign to the Trustee the Issuer's rights
under this Agreement, including the right to receive payments hereunder (except
the right of the Issuer to receive certain payments, if any, with respect to
expenses and indemnification under Sections 4.2(c), 6.3, 8.2 and 8.3 hereof and
the right of the Issuer to consent to amendments to the Facilities pursuant to
Section 3.1 hereof), and the Issuer hereby directs the Company to make the
payments required hereunder (except such payments for expenses and
indemnification) directly to the Trustee.  The Company hereby assents to such
assignment and agrees to make payments directly to the Trustee without defense
or set-off by reason of any dispute between the Company and the Issuer or the
Trustee.

          SECTION 4.5.  AMOUNTS REMAINING IN FUNDS. It is agreed by the parties
hereto that after payment in full of (i) the Bonds, or after provision for such
payment shall have been made as provided in the Indenture, (ii) the fees,
charges and expenses of the Trustee, any paying agents and the Issuer in
accordance with the Indenture and (iii) all other amounts required to be paid
under this Agreement and the Indenture, including, without limitation, amounts
required to be paid from the Rebate Fund, any amounts remaining in any fund
held by the Trustee under the Indenture shall belong to the Company and be paid
to the Company by the Trustee.


                                   ARTICLE V

                        SPECIAL COVENANTS AND AGREEMENTS

          SECTION 5.1.  RIGHT OF ACCESS TO THE FACILITIES AND RECORDS.  The
Company agrees that during the term of this Agreement the Issuer, the Trustee
and the duly authorized agents of either of them shall have the right at all
reasonable times during normal business hours to examine the books and records
of the Company with respect to the Facilities and to enter upon the site of the
Facilities to examine and inspect the Facilities, provided, however, that this
right is subject to federal and State of Nevada laws and regulations applicable
to the site of the Facilities.  The rights of access hereby reserved to the
Issuer and the Trustee may be exercised only after such agent




                                       10
<PAGE>   15
shall have executed release of liability and secrecy agreements if requested by
the Company in the form then currently used by the Company, and nothing
contained in this Section or in any other provision of this Agreement shall be
construed to entitle the Issuer or the Trustee to any information or inspection
involving the confidential know-how of the Company.

SECTION 5.2.  THE COMPANY'S MAINTENANCE OF ITS EXISTENCE; ASSIGNMENTS.

          (a) To the extent permitted by law and its Articles of Incorporation,
the Company agrees that during the term of this Agreement it will maintain its
existence as a corporation, will continue to maintain its status as a
corporation in good standing in the State of California, will continue to be
qualified to conduct business in the State of Nevada under the laws thereof,
will not dissolve or otherwise dispose of all or substantially all of its
assets and will not combine or consolidate with or merge into another person or
permit one or more persons to consolidate with or merge into it; PROVIDED,
HOWEVER, that the Company may so combine or consolidate with another person
legally existing under the laws of one of the states of the United States, or
permit one or more such persons to consolidate with or merge into it, if the
Company is the surviving corporation; and PROVIDED, FURTHER, that the Company
may so combine, consolidate with, or merge into another person legally existing
under the laws of one of the states of the United States, or permit one or more
persons to consolidate with or merge into it, or sell or otherwise transfer to
another person all or substantially all of its assets as an entity and
thereafter dissolve if the Company delivers to the Issuer:  (1) written
evidence that the surviving, resulting or transferee person, as the case may
be, assumes and agrees in writing to pay and perform all of the obligations of
the Company hereunder; (2) written evidence that the surviving, resulting or
transferee person, as the case may be, qualifies to do business in the State of
Nevada; (3) written evidence that the surviving, resulting or transferee
person, as the case may be, shall have a net worth greater than or equal to 90%
of that of the Company immediately prior to such combination, consolidation or
merger, determined in accordance with generally accepted accounting principles;
(4) a copy of any application made to any regulatory commission or agency
having jurisdiction over the merger or other transaction; (5) within ten (10)
business days after the consummation of the merger (other than a merger
involving the Company and any wholly-owned subsidiary of the Company) or other
transaction, (A) counterpart copies of the merger instruments, or other
documents constituting the transaction, including copies of the instruments of
assumption referred to in clause (1) above and evidence of qualification as
referred to in clause (2) above; and (B) an opinion of counsel satisfactory to
the Issuer that all of the provisions of this Section 5.2(a) have been complied
with and that all necessary corporate and governmental approvals have been
obtained.





                                       11
<PAGE>   16
          In the case of a merger involving the Company and any wholly-owned
subsidiary of the Company, the Company shall send the Issuer a notice of such
merger within ten (10) business days after its completion, together with an
opinion of counsel as described in the preceding clause (5) (B).  The Company
shall provide the Issuer with at least thirty (30) days' written notice prior
to the consummation of any merger or other transaction described in this
Section 5.2(a).  At such time the Company shall provide the Issuer with drafts
of the documents of assumption and the legal opinion referred to in clause (5)
above.  The Company agrees to provide such other information as the Issuer may
reasonably request in order to assure compliance with this Section 5.2(a).

          Notwithstanding any other provisions of this Section 5.2(a), the
Company need not comply with any of the provisions of the first two paragraphs
of this Section 5.2(a) if, at the time of such merger, combination, sale of
assets, dissolution or reorganization, the Bonds will be defeased as provided
in Article X of the Indenture.

          (b) The rights and obligations of the Company under this Agreement
may be assigned by the Company to any person in whole or in part, subject,
however, to each of the following conditions:

     (i) No assignment other than pursuant to subsection (a) of this Section
shall relieve the Company from primary liability for any of its obligations
hereunder, and in the event of any assignment not pursuant to subsection (a) of
this Section the Company shall continue to remain primarily liable for the
payments specified in Section 4.2 hereof and for performance and observance of
the other agreements on its part herein provided to be performed and observed
by it.

    (ii) Any assignment from the Company shall retain for the Company such
rights and interests as will permit it to perform its obligations under this
Agreement, and any assignee from the Company shall assume in writing the
obligations of the Company hereunder to the extent of the interest assigned.

   (iii) The Company shall give the Issuer thirty days notice of any assignment
(other than pursuant to subsection (a) above), and shall, within thirty (30)
days after delivery of any assignment, furnish or cause to be furnished to the
Issuer and the Trustee a true and complete copy of each such assignment
together with an instrument of assumption, and an Opinion of Counsel
satisfactory to the Issuer that the provisions of this section 5.2(b) have been
complied with.

          SECTION 5.3.  NOTICE AND CERTIFICATES TO TRUSTEE.  The Company hereby
agrees to provide the Trustee with the following:





                                       12
<PAGE>   17
          (a) On or before the fifth (5th) Business Day following each Interest
Payment Date while any of the Bonds are Outstanding, a certificate of an
officer of the Company that all payments required under this Agreement have
been made;

          (b) Within one hundred twenty (120) days after the end of each fiscal
year of the Company, (i) a certificate of an officer of the Company to the
effect that all payments have been made under this Agreement and that, to the
best of such officer's knowledge, there exists no Event of Default or event
which, with the passage of time or the giving of notice, or both, would become
an Event of Default, or, if any default or Event of Default exists, a
description thereof and (ii) the audited annual report of the Company for such
fiscal year; and

          (c) Upon knowledge of an Event of Default under this Agreement or the
Indenture, notice of such Event of Default, such notice to include a
description of the nature of such event and what steps are being taken to
remedy such Event of Default.


          SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES; UTILITY AND OTHER
CHARGES; INSURANCE.  The Company agrees to maintain, to the extent permitted by
applicable law and regulation, the Facilities, or cause the Facilities to be so
maintained, during the term of this Agreement (i) in as reasonably safe
condition as its operations shall permit and (ii) in good repair and in good
operating condition, ordinary wear and tear excepted, making from time to time
all necessary repairs thereto and renewals and replacements thereof.

          The Company agrees to pay or cause to be paid during the term of this
Agreement all taxes, governmental charges of any kind lawfully assessed or
levied upon the Facilities or any part thereof, all utility and other charges
incurred in the operation, maintenance, use, occupancy and upkeep of the
Facilities and all assessments and charges lawfully made by any governmental
body for public improvements that may be secured by a lien on the Facilities,
provided that with respect to special assessments or other governmental charges
that may lawfully be paid in installments over a period of years, the Company
shall be obligated to pay only such installments as are required to be paid
during the term of this Agreement.  The Company may, at the Company's expense
and in the Company's name, in good faith, contest any such taxes, assessments
and other charges and, in the event of any such contest, may permit the taxes,
assessments or other charges so contested to remain unpaid during that period
of such contest and any appeal therefrom unless by such nonpayment the
Facilities or any part thereof will be subject to loss or forfeiture.

          The Company agrees that it will keep, or cause to be kept, (i) the
Facilities insured against such risks and in such





                                       13
<PAGE>   18
amounts as are consistent with its insurance practices for similar types of
facilities (which may include self-insurance), and (ii) insurance against all
direct or contingent loss or liability for personal injury, death or property
damage occasioned by the operation of the Facilities, which insurance may be a
part of the policy or policies of insurance customarily maintained by the
Company in connection with its general property and liability insurance upon
all of the plants and properties operated by it (including such deductibles as
may be provided in said policies).

          SECTION 5.5.  QUALIFICATION IN NEVADA.  The Company agrees that
throughout the term of this Agreement it, or any successor or assignee as
permitted by Section 5.2, will be qualified to do business in the State of
Nevada.

          SECTION 5.6.  TAX EXEMPT STATUS OF BONDS.  It is the intention of the
Company that interest on the Bonds shall be and remain Tax-exempt.  To that end
the covenants and agreements of the Company in this Section are for the benefit
of the Trustee and each and every holder of the Bonds.

          The Company represents and warrants that substantially all of the
proceeds of the Bonds will be used with respect to the Facilities as more
specifically set forth in the Tax Certificate and the Engineering Certificate.

          The Company covenants and agrees that it has not taken or permitted
to be taken and will not take or permit to be taken any action which will cause
the interest on the Bonds not to be Tax-exempt; provided that the Company shall
not have violated this covenant if the interest on any of the Bonds becomes
taxable to a person solely because such person is a "substantial user" of the
Facilities or a "related person" within the meaning of Section 147(a) of the
Code or Section 103(b) (13) of the 1954 Code, as applicable; and provided
further that none of the covenants and agreements herein contained shall
require the Company to enter an appearance or intervene in any administrative,
legislative or judicial proceeding in connection with any changes in applicable
laws, rules or regulations or in connection with any decisions of any court or
administrative agency or other governmental body affecting the taxation of
interest on the Bonds.

          The Company acknowledges having read Section 5.08 of the Indenture
and agrees to perform all duties imposed upon it by such Section 5.08 of the
Indenture, by the Tax Certificate and by the Engineering Certificate.  Insofar
as said Section 5.08 of the Indenture, the Tax Certificate and the Engineering
Certificate impose duties and responsibilities on the Company, they are
specifically incorporated herein by reference.





                                       14
<PAGE>   19
                                   ARTICLE VI

                         EVENTS OF DEFAULT AND REMEDIES

          SECTION 6.1.  EVENTS OF DEFAULT.  Any one of the following which
occurs and continues shall constitute an Event of Default:

          (a) failure by the Company to pay any amounts required to be paid
under Section 4.2(a) hereof which failure causes an Event of Default under the
Indenture;

          (b) failure of the Company to observe and perform any covenant,
condition or agreement on its part required to be observed or performed by this
Agreement, other than making the payments referred to in (a) above, which
continues for a period of ninety (90) days after written notice, which notice
shall specify such failure and request that it be remedied, given to the
Company by the Issuer or the Trustee, unless the Issuer and the Trustee shall
agree in writing to an extension of such time; provided, however, that if the
failure stated in the notice can be corrected, but cannot be corrected within
such period, the Issuer and the Trustee will not unreasonably withhold their
consent to an extension of such time if corrective action is instituted within
such period and diligently pursued until the default is corrected; or

          (c)  an Act of Bankruptcy of the Company.

The provisions of subsection (b) of this Section are subject to the limitation
that the Company shall not be deemed in default if and so long as the Company
is unable to carry out its agreements hereunder by reason of strikes, lockouts
or other industrial disturbances; acts of public enemies; orders of any kind of
the government of the United States or of the States of Nevada or California or
any of their departments, agencies, or officials, or any civil or military
authority; insurrections; riots; epidemics; landslides; lightning; earthquake;
fire; hurricanes; storms; floods; washouts; droughts; arrests; restraint of
government and people; civil disturbances; explosions; breakage or accident to
machinery, transmission pipes or canals; partial or entire failure of
utilities; or any other cause or event not reasonably within the control of the
Company; it being agreed that the settlement of strikes, lockouts and other
industrial disturbances shall be entirely within the discretion of the Company,
and the Company shall not be required to make settlement of strikes, lockouts
and other industrial disturbances by acceding to the demands of the opposing
party or parties when such course is, in the judgment of the Company,
unfavorable to the Company.  This limitation shall not apply to any default
under subsections (a) or (c) of this Section.

          SECTION 6.2.  REMEDIES ON DEFAULT.  Whenever any Event of Default
shall have occurred and shall continue:




                                       15
<PAGE>   20
     (a) The Trustee, by written notice to the Company, shall declare the
unpaid balance of the loan payable under Section 4.2(a) of this Agreement to be
due and payable immediately, if concurrently with or prior to such notice the
unpaid principal amount of the Bonds shall have been declared to be due and
payable.  Upon any such declaration such amount shall become and shall be
immediately due and payable as set forth in Section 7.01 of the Indenture.

     (b) The Trustee may have access to and may inspect, examine and make
copies of the books and records and any and all accounts, data and federal
income tax and other tax returns of the Company.

     (c) The Issuer or the Trustee may take whatever action at law or in equity
as may be necessary or desirable to collect the payments and other amounts then
due and thereafter to become due or to enforce performance and observance of
any obligation, agreement or covenant of the Company under this Agreement.

          In case the Trustee or the Issuer shall have proceeded to enforce its
rights under this Agreement and such proceedings shall have been discontinued
or abandoned for any reason or shall have been determined adversely to the
Trustee or the Issuer, then, and in every such case, the Company, the Trustee
and the Issuer shall be restored respectively to their several positions and
rights hereunder, and all rights, remedies and powers of the Company, the
Trustee and the Issuer shall continue as though no such action had been taken.

          The Company covenants that, in case an Event of Default shall occur
with respect to the payment of any Repayment Installment payable under Section
4.2(a) hereof, then, upon demand of the Trustee, the Company will pay to the
Trustee the whole amount that then shall have become due and payable under said
Section, with interest, to the extent permitted by law, on the amount then
overdue at the rate of interest per annum borne by the Bonds until such amount
has been paid.

          In case the Company shall fail forthwith to pay such amounts upon
such demand, the Trustee shall be entitled and empowered to institute any
action or proceeding at law or in equity for the collection of the sums so due
and unpaid, and may prosecute any such action or proceeding to judgment or
final decree, and may enforce any such judgment or final decree against the
Company and collect in the manner provided by law the moneys adjudged or
decreed to be payable.

          In case proceedings shall be pending for the bankruptcy or for the
reorganization of the Company under the federal bankruptcy laws or any other
applicable law, or in case a receiver or trustee shall have been appointed for
the property of the Company or in the case of any other similar judicial





                                       16
<PAGE>   21
proceedings relative to the Company, or the creditors or property of the
Company, then the Trustee shall be entitled and empowered, by intervention in
such proceedings or otherwise, to file and prove a claim or claims for the
whole amount owing and unpaid pursuant to this Agreement and, in case of any
judicial proceedings, to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee allowed in such judicial proceedings relative to the Company, its
creditors or its property, and to collect and receive any moneys or other
property payable or deliverable on any such claims, and to distribute such
amounts as provided in the Indenture after the deduction of its charges and
expenses.  Any receiver, assignee or trustee in bankruptcy or reorganization is
hereby authorized to make such payments to the Trustee, and to pay to the
Trustee any amount due it for compensation and expenses, including expenses and
fees of counsel incurred by it up to the date of such distribution.

          SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND EXPENSES.  In the
event the Company should default under any of the provisions of this Agreement
and the Issuer or the Trustee should employ attorneys or incur other expenses
for the collection of the payments due under this Agreement or the enforcement
of performance or observance of any obligation or agreement on the part of the
Company herein contained, the Company agrees to pay to the Issuer or the
Trustee the reasonable fees of such attorneys and such other expenses so
incurred by the Issuer or the Trustee.

          SECTION 6.4.  NO REMEDY EXCLUSIVE.  No remedy herein conferred upon
or reserved to the Issuer or the Trustee is intended to be exclusive of any
other available remedy or remedies, but each and every such remedy shall be
cumulative and shall be in addition to every other remedy given under this
Agreement or now or hereafter existing at law or in equity or by statute.  No
delay or omission to exercise any right or power accruing upon any default
shall impair any such right or power or shall be construed to be a waiver
thereof, but any such right and power may be exercised from time to time and as
often as may be deemed expedient.  In order to entitle the Issuer or the
Trustee to exercise any remedy reserved to it in this Article, it shall not be
necessary to give any notice, other than such notice as may be herein expressly
required.  Such rights and remedies as are given the Issuer hereunder shall
also extend to the Trustee, and the Trustee and the holders of the Bonds shall
be deemed third party beneficiaries of all covenants and agreements herein
contained.

          SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE WAIVER.  In the
event any agreement or covenant contained in this Agreement should be breached
by the Company and thereafter waived by the Issuer or the Trustee, such waiver
shall be limited to the particular breach so waived and shall not be deemed to
waive any other breach hereunder.





                                       17
<PAGE>   22
                                  ARTICLE VII

                                   PREPAYMENT

          SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT MONEYS.  By virtue
of the assignment of the rights of the Issuer under this Agreement to the
Trustee as is provided in Section 4.4 hereof, the Company agrees to and shall
pay directly to the Trustee any amount permitted or required to be paid by it
under this Article VII.  The Trustee shall use the moneys so paid to it by the
Company to redeem the Bonds on the date set for such redemption pursuant to
Section 7.5 hereof.

          SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS.  The Company shall have
the option to prepay the amounts payable under Section 4.2 hereof with respect
to the Bonds, in whole or in part, by paying to the Trustee, for deposit in the
Bond Fund, the amount set forth in Section 7.4 hereof, under circumstances set
forth in Sections 4.01(a) and 4.01(b) of the Indenture.  The Company shall
notify the Trustee and the Issuer in writing of its election to prepay the
amounts payable hereunder and direct the Trustee to cause the Bonds to be
redeemed on a date specified, which shall be at least forty-five (45) days
after the date of such notice.

          SECTION 7.3.  MANDATORY PREPAYMENT.  The Company shall have and
hereby accepts the obligation to prepay Repayment Installments with respect to
the Bonds to the extent mandatory redemption of the Bonds is required pursuant
to Section 4.01(c) of the Indenture.  The Company shall (i) satisfy its
obligation hereunder by prepaying such Repayment Installments within one
hundred eighty (180) days after the occurrence of a Determination of
Taxability, in the case of mandatory redemption pursuant to Section 4.01(c) (i)
of the Indenture; or (ii) be deemed to satisfy its obligation hereunder upon
the transfer by the Trustee of remaining amounts on deposit in the Construction
Fund to the Bond Fund, in the case of mandatory redemption pursuant to Section
4.01(c) (ii) of the Indenture, provided that within ten (10) days after such
transfer the Company shall pay to the Trustee any additional amounts required
pursuant to Section 3.4 or Section 7.4 hereof.  The amount payable by the
Company in the event of a prepayment required by this Section shall be
determined as set forth in Section 7.4 hereof and shall be deposited in the
Bond Fund.

          SECTION 7.4.  AMOUNT OF PREPAYMENT.  In the case of a prepayment of
the entire amount due hereunder with respect to the Bonds pursuant to Section
7.2 or 7.3 hereof, the amount to be paid shall be a sum sufficient, together
with other funds and the yield on any securities deposited with the Trustee and
available without reinvestment for such purpose, to pay (1) the principal of
all Bonds Outstanding on the redemption date specified in the notice of
redemption, plus interest accrued and to accrue to the payment or redemption
date of the Bonds, plus premium, if any, required pursuant to the Indenture,
(2) all reasonable and





                                       18
<PAGE>   23
necessary fees and expenses of the Issuer, the Trustee and any paying agent
accrued and to accrue through final payment of the Bonds, and (3) all other
liabilities of the Company accrued and to accrue with respect to the Bonds
under this Agreement.

          In the case of partial prepayment of the Repayment Installments
pursuant to Section 7.2 or 7.3 hereof, the amount payable shall be a sum
sufficient, together with other funds deposited with the Trustee and available
without reinvestment for such purpose, to pay the principal amount of and
premium, if any, and accrued interest on the Bonds to be redeemed, as provided
in the Indenture, and to pay the expenses of redemption of the Bonds.

          SECTION 7.5.  NOTICE OF PREPAYMENT.  To exercise an option granted in
or to perform an obligation required by this Article VII, the Company shall
give written notice to the Issuer and the Trustee at least fifteen (15) days
prior to the last day by which the Trustee is permitted to give notice of
redemption pursuant to Section 4.03 of the Indenture, specifying the date upon
which any prepayment will be made.  If, in the case of a mandatory prepayment
pursuant to Section 7.3 hereof, the Company fails to give such notice of a
prepayment required by this Section 7.5, such notice may be given by the
Issuer, by the Trustee or by any holder or holders of ten percent (10%) or more
in aggregate principal amount of the Bonds Outstanding.  The Issuer and the
Trustee, at the request of the Company or any such Bondholder, shall forthwith
take all steps necessary under the applicable provisions of the Indenture to
effect redemption of all or part of the then Outstanding Bonds, on the earliest
practicable date thereafter on which such redemption may be made under
applicable provisions of the Indenture (except that neither the Issuer nor the
Trustee shall be required to make payment of any money required for such
redemption).


                                  ARTICLE VIII

               NON-LIABILITY OF ISSUER; EXPENSES; INDEMNIFICATION

          SECTION 8.1.  NON-LIABILITY OF ISSUER.  The Issuer shall not be
obligated to pay the principal of, or premium, if any, or interest on the
Bonds, except from Revenues.  The Company hereby acknowledges that the Issuer's
sole source of moneys to repay the Bonds will be provided by the payments made
by the Company pursuant to this Agreement, together with other Revenues,
including investment income on certain funds and accounts held by the Trustee
under the Indenture, and hereby agrees that if the payments to be made
hereunder shall ever prove insufficient to pay all principal of, and premium,
if any, and interest on the Bonds as the same shall become due (whether by
maturity, redemption, acceleration or otherwise), then upon notice from the
Trustee, the Company shall pay such amounts as are required from time to time
to prevent any deficiency or default in the payment of such principal, premium
or interest, including, but not




                                       19
<PAGE>   24
limited to, any deficiency caused by acts, omissions, nonfeasance or
malfeasance on the part of the Trustee, the Company, the Issuer or any third
party.

          SECTION 8.2.  EXPENSES.  The Company covenants and agrees to pay and
to indemnify the Issuer and the Trustee against all costs and charges,
including reasonable fees and disbursements of attorneys, accountants,
consultants and other experts, incurred in good faith in connection with this
Agreement, the Bonds, the Indenture, the 1985 Bonds Escrow Agreement or the
1988 Bonds Escrow Agreement.

          SECTION 8.3.  INDEMNIFICATION.  (a) The Company releases the Issuer
from, and covenants and agrees that the Issuer shall not be liable for, and
covenants and agrees, to the extent permitted by law, to indemnify and hold
harmless the Issuer and its directors, officers, employees and agents from and
against, any and all losses, claims, damages, liabilities or expenses, of every
conceivable kind, character and nature whatsoever arising out of, resulting
from or in any way connected with (1) the Facilities, or the conditions,
occupancy, use, possession, conduct or management of, or work done in or about,
or from the planning, design, acquisition, installation or construction of the
Facilities or any part thereof; (2) the issuance of any Bonds or any
certifications, covenants or representations made in connection therewith and
the carrying out of any of the transactions contemplated by the Bonds and this
Agreement; (3) the Trustee's acceptance or administration of the trusts under
the Indenture, or the exercise or performance of any of its powers or duties
under the Indenture; or (4) any untrue statement or alleged untrue statement of
any material fact or omission or alleged omission to state a material fact
necessary to make the statements made, in light of the circumstances under
which they were made, not misleading, in any limited offering memorandum,
official statement or other offering circular utilized by the Issuer or any
underwriter or placement agent in connection with the sale of any Bonds;
provided that such indemnity shall not be required for damages that result from
willful misconduct on the part of the party seeking such indemnity.  The
Company further covenants and agrees, to the extent permitted by law, to pay or
to reimburse the Issuer and its officers, employees and agents for any and all
costs, reasonable attorneys fees, liabilities or expenses incurred in
connection with investigating, defending against or otherwise in connection
with any such losses, claims, damages, liabilities, expenses or actions, except
to the extent that the same arise out of the willful misconduct of the party
claiming such payment or reimbursement.  The provisions of this paragraph shall
survive the retirement of the Bonds.

          (b) The Company releases the Trustee from, and covenants and agrees
that the Trustee shall not be liable for, and covenants and agrees, to the
extent permitted by law, to indemnify and hold harmless the Trustee and its
directors, officers, employees and agents from and against, any and all





                                       20
<PAGE>   25
losses, claims, damages, liabilities or expenses, of every conceivable kind,
character and nature whatsoever arising out of, resulting from or in any way
connected with (1) the Facilities, or the conditions, occupancy, use,
possession, conduct or management of, or work done in or about, or from the
planning, design, acquisition, installation or construction of the Facilities
or any part thereof; (2) the issuance of any Bonds or any certifications,
covenants or representations made in connection therewith and the carrying out
of any of the transactions contemplated by the Bonds and this Agreement; (3)
the Trustee's acceptance or administration of the trusts under the Indenture,
or the exercise or performance of any of its powers or duties under the
Indenture; or (4) any untrue statement or alleged untrue statement of any
material fact or omission or alleged omission to state a material fact
necessary to make the statements made, in light of the circumstances under
which they were made, not misleading, in any limited offering memorandum,
official statement or other offering circular utilized by the Issuer or any
underwriter or placement agent in connection with the sale of any Bonds;
provided that such indemnity shall not be required for damages that result from
negligence or willful misconduct on the part of the party seeking such
indemnity.  The Company further covenants and agrees, to the extent permitted
by law, to pay or to reimburse the Trustee and its officers, employees and
agents for any and all costs, reasonable attorneys fees, liabilities or
expenses incurred in connection with investigating, defending against or
otherwise in connection with any such losses, claims, damages, liabilities,
expenses or actions, except to the extent that the same arise out of the
negligence or willful misconduct of the party claiming such payment or
reimbursement.  The provisions of this paragraph shall survive the retirement
of the Bonds.


                                   ARTICLE IX

                                 MISCELLANEOUS

          SECTION 9.1.  NOTICES.  All notices, certificates or other
communications shall be deemed sufficiently given on the second day following
the day on which the same have been mailed by certified mail, postage prepaid,
addressed to the Issuer, the Company or the Trustee at the addresses specified
in Section 11.07 of the Indenture.  A duplicate copy of each notice,
certificate or other communication given hereunder by either the Issuer or the
Company to the other shall also be given to the Trustee.  The Issuer, the
Company, and the Trustee may, by notice given hereunder, designate any
different addresses to which subsequent notices, certificates or other
communications shall be sent.

          SECTION 9.2.  SEVERABILITY.  If any provision of this Agreement shall
be held or deemed to be, or shall in fact be, illegal, inoperative or
unenforceable, the same shall not affect any other provision or provisions
herein contained or render the





                                       21
<PAGE>   26
same invalid, inoperative, or unenforceable to any extent whatever.

          SECTION 9.3.  EXECUTION OF COUNTERPARTS.  This Agreement may be
simultaneously executed in several counterparts, each of which shall be an
original and all of which shall constitute but one and the same instrument;
provided, however, that for purposes of perfecting a security interest in this
Agreement by the Trustee under Article 9 of the Nevada Uniform Commercial Code,
only the counterpart delivered, pledged, and assigned to the Trustee shall be
deemed the original.

          SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS.  Except as
otherwise provided in this Agreement or the Indenture, subsequent to the
initial issuance of Bonds and prior to their payment in full, or provision for
such payment having been made as provided in the Indenture, this Agreement may
not be effectively amended, changed, modified, altered or terminated without
the written consent of the Trustee.

          SECTION 9.5.  GOVERNING LAW.  This Agreement shall be governed
exclusively by and construed in accordance with the applicable laws of the
State of Nevada.

          SECTION 9.6.  AUTHORIZED COMPANY REPRESENTATIVE.  Whenever under the
provisions of this Agreement the approval of the Company is required or the
Company is required to take some action at the request of the Issuer, such
approval or such request shall be given on behalf of the Company by the
Authorized Company Representative, and the Issuer and the Trustee shall be
authorized to act on any such approval or request and neither party hereto
shall have any complaint against the other or against the Trustee as a result
of any such action taken.

          SECTION 9.7.  TERM OF THE AGREEMENT.  This Agreement shall be in full
force and effect from the date hereof and shall continue in effect as long as
any of the Bonds are Outstanding or the Trustee holds any moneys under the
Indenture, whichever is later; provided, however, that the rights of the
Trustee and the Issuer under Sections 8.2 and 8.3 hereof shall survive the
termination of this Agreement, the retirement of the Bonds and the removal of
the Trustee.  All representations and certifications by the Company as to all
matters affecting the Tax-exempt status of the Bonds shall survive the
termination of this Agreement.

          SECTION 9.8.  BINDING EFFECT.  This Agreement shall inure to the
benefit of and shall be binding upon the Issuer, the Company and their
respective successors and assigns; subject, however, to the limitations
contained in Section 5.2 hereof.





                                       22
<PAGE>   27
          SECTION 9.9.  THIRD-PARTY BENEFICIARY.  The Trustee is hereby named a
third-party beneficiary to this Agreement to the extent the Company is required
to indemnify, compensate or provides direction or information to the Trustee
pursuant to the terms hereof.

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed as of the date first above written.


                                                            CLARK COUNTY, NEVADA



                                          By____________________________________
                                                              Chairman, Board of
                                                            County Commissioners
[SEAL]

Attest


____________________________
       County Clerk

                                                       SOUTHWEST GAS CORPORATION



                                         By_____________________________________
                                                                       Treasurer


[SEAL]

Attest:

_______________________________
         Secretary





                                       23
<PAGE>   28
                                   EXHIBIT A

                         DESCRIPTION OF THE FACILITIES

                     Description of the Existing Facilities


          The Existing Facilities consist of (1) meters, customer service
connections, mains, pressure regulators and other lower- pressure gas
distribution facilities (generally having a maximum allowable operating
pressure of less than [400] psig) by which the Company furnishes gas to
customers located within its retail service area in Clark County, Nevada,
together with other plant, property and equipment acquired, installed or
constructed in connection therewith; (2) mains, pressure regulators, compressor
facilities and other higher pressure gas transmission facilities (generally
having a maximum allowable operating pressure of [400] psig and over) by which
the Company transports gas to and within its retail customer service area in
Clark County, Nevada, together with other plant, property and equipment
acquired, installed or constructed in connection therewith; (3) an operations
center complex, and related facilities, equipment and improvements in Clark
County, Nevada; and (4) associated land and land-rights.

                           Description of the Project


          The Project shall consist of those certain additions and improvements
to the Company's natural gas distribution and transmission system through which
the Company furnishes natural gas to its customers in Clark County, and certain
other plant, property and equipment used or to be used for the same purposes.





                                      A-l

<PAGE>   1

                                                              EXHIBIT 10.04


                              FINANCING AGREEMENT

                                    Between

                              CLARK COUNTY, NEVADA

                                      And

                           SOUTHWEST GAS CORPORATION

                         ______________________________

                          Dated as of December 1, 1993
                         ______________________________

                                  Relating to

                                  $75,000,000

                              Clark County, Nevada
                      Industrial Development Revenue Bonds
                          (Southwest Gas Corporation)
                                 1993 Series A
<PAGE>   2





                              FINANCING AGREEMENT

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
           <S>                                                           <C>
           PARTIES  . . . . . . . . . . . . . . . . . . . . . . . . . .   1
           PREAMBLES  . . . . . . . . . . . . . . . . . . . . . . . . .   1


                                      ARTICLE I

                                     DEFINITIONS

           SECTION 1.1.  DEFINITION OF TERMS  . . . . . . . . . . . . .   1
           SECTION 1.2.  NUMBER AND GENDER  . . . . . . . . . . . . . .   2
           SECTION 1.3.  ARTICLES, SECTIONS, ETC  . . . . . . . . . . .   2

                                      ARTICLE II

                                   REPRESENTATIONS

           SECTION 2.1.  REPRESENTATIONS OF THE ISSUER  . . . . . . . .   2
           SECTION 2.2.  REPRESENTATIONS OF THE COMPANY . . . . . . . .   3

                                     ARTICLE III

                CONSTRUCTION OF THE PROJECT; AMENDMENT OF THE PROJECT;
                                ISSUANCE OF THE BONDS

           SECTION 3.1.  AGREEMENT TO CONSTRUCT THE PROJECT;
                              AMENDMENT OF THE PROJECT  . . . . . . . .   4
           SECTION 3.2.  AGREEMENT TO ISSUE BONDS;
                              APPLICATION OF BOND PROCEEDS  . . . . . .   5
           SECTION 3.3  DISBURSEMENTS FROM THE CONSTRUCTION FUND
                              AND COSTS OF ISSUANCE FUND  . . . . . . .   5
           SECTION 3.4.  ESTABLISHMENT OF COMPLETION DATE;
                              OBLIGATION OF COMPANY TO COMPLETE . . . .   6
           SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS  . . . . . . . .   7

                                      ARTICLE IV

                        LOAN OF PROCEEDS; REPAYMENT PROVISIONS

           SECTION 4.1.  LOAN OF BOND PROCEEDS  . . . . . . . . . . . .   7
           SECTION 4.2.  REPAYMENT AND PAYMENT OF
                              OTHER AMOUNTS PAYABLE . . . . . . . . . .   8
           SECTION 4.3.  UNCONDITIONAL OBLIGATION . . . . . . . . . . .   9
           SECTION 4.4.  ASSIGNMENT OF ISSUER'S RIGHTS  . . . . . . . .  10
           SECTION 4.5.  AMOUNTS REMAINING IN FUNDS . . . . . . . . . .  10
</TABLE>





                                       i
<PAGE>   3





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
           <S>                                                           <C>
                                      ARTICLE V

                           SPECIAL COVENANTS AND AGREEMENTS

           SECTION 5.1.  RIGHT OF ACCESS TO THE PROJECT AND RECORDS . .  10
           SECTION 5.2.  THE COMPANY'S MAINTENANCE OF ITS EXISTENCE;
                              ASSIGNMENTS . . . . . . . . . . . . . . .  11
           SECTION 5.3.  NOTICE AND CERTIFICATES TO TRUSTEE . . . . . .  12
           SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES; UTILITY AND
                              OTHER CHARGES; INSURANCE  . . . . . . . .  13
           SECTION 5.5.  QUALIFICATION IN NEVADA  . . . . . . . . . . .  14
           SECTION 5.6.  TAX EXEMPT STATUS OF BONDS . . . . . . . . . .  14

                                      ARTICLE VI

                            EVENTS OF DEFAULT AND REMEDIES

           SECTION 6.1.  EVENTS OF DEFAULT  . . . . . . . . . . . . . .  14
           SECTION 6.2.  REMEDIES ON DEFAULT  . . . . . . . . . . . . .  15
           SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND EXPENSES   17
           SECTION 6.4.  NO REMEDY EXCLUSIVE  . . . . . . . . . . . . .  17
           SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE WAIVER . .  17

                                     ARTICLE VII

                                      PREPAYMENT

           SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT MONEYS . .  18
           SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS . . . . . . . .  18
           SECTION 7.3.  MANDATORY PREPAYMENT . . . . . . . . . . . . .  18
           SECTION 7.4.  AMOUNT OF PREPAYMENT . . . . . . . . . . . . .  18
           SECTION 7.5.  NOTICE OF PREPAYMENT . . . . . . . . . . . . .  19

                                     ARTICLE VIII

                  NON-LIABILITY OF ISSUER; EXPENSES; INDEMNIFICATION

           SECTION 8.1.  NON-LIABILITY OF ISSUER  . . . . . . . . . . .  19
           SECTION 8.2.  EXPENSES . . . . . . . . . . . . . . . . . . .  20
           SECTION 8.3.  INDEMNIFICATION  . . . . . . . . . . . . . . .  20

                                      ARTICLE IX

                                    MISCELLANEOUS

           SECTION 9.1.  NOTICES  . . . . . . . . . . . . . . . . . . .  21
           SECTION 9.2.  SEVERABILITY . . . . . . . . . . . . . . . . .  21
           SECTION 9.3.  EXECUTION OF COUNTERPARTS  . . . . . . . . . .  22
           SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS  . . . .  22
           SECTION 9.5.  GOVERNING LAW  . . . . . . . . . . . . . . . .  22
           SECTION 9.6.  AUTHORIZED COMPANY REPRESENTATIVE  . . . . . .  22
</TABLE>





                                       ii
<PAGE>   4





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                            <C>
          SECTION 9.7.  TERM OF THE AGREEMENT . . . . . . . . . . . . .  22
          SECTION 9.8.  BINDING EFFECT  . . . . . . . . . . . . . . . .  22
          SECTION 9.9.  THIRD-PARTY BENEFICIARY . . . . . . . . . . . .  23


          TESTIMONIUM   . . . . . . . . . . . . . . . . . . . . . . . .  23

          SIGNATURES AND SEALS  . . . . . . . . . . . . . . . . . . . .  23

          EXHIBIT A      Description of the Project
</TABLE>





                                      iii
<PAGE>   5
                              FINANCING AGREEMENT


                 THIS FINANCING AGREEMENT, dated as of December 1, 1993 (this
"Agreement"), by and between CLARK COUNTY, NEVADA, a political subdivision of
the State of Nevada (the "Issuer"), and SOUTHWEST GAS CORPORATION, a
corporation organized and existing under the laws of the State of California
and qualified to do business as a foreign corporation under the laws of the
State of Nevada (the "Company"),

                              W I T N E S S E T H

                 WHEREAS, the Issuer is authorized and empowered under the
County Economic Development Revenue Bond Law, Sections 244A.669 to 244A.763,
inclusive, of the Nevada Revised Statutes, as amended (the "Act"), to borrow
money and to issue bonds in accordance with the Act and to use the proceeds
thereof for the purpose of financing all or part of the cost of certain
facilities, including the cost of extending, adding to, or improving such
facilities, and to make loans to any person, firm, corporation or other
industrial entity for the planning, design, construction, acquisition or
carrying out of any facilities in furtherance of the public purpose for which
the Issuer was created; and

                 WHEREAS, the Issuer proposes to issue its Clark County, Nevada
Industrial Development Revenue Bonds (Southwest Gas Corporation) 1993 Series A
(the "Bonds"), in the aggregate principal amount of $75,000,000 upon the terms
and conditions set forth in the Indenture of Trust, of even date herewith (the
"Indenture"), between the Issuer and the Trustee, for the purposes, among
others, of financing the costs of the acquisition, construction, improvement
and equipping of certain real and personal properties, facilities, machinery
and equipment described in Exhibit "A" hereto (the "Project"), which qualifies
as a "project" under the Act;

                 NOW, THEREFORE, in consideration of the premises and the
respective representations and covenants herein contained, the parties hereto
agree as follows


                                   ARTICLE I

                                  DEFINITIONS

                 SECTION 1.1.  DEFINITION OF TERMS.  Unless the context
otherwise requires, the terms used in this Agreement shall have the meanings
specified in Section 1.01 of the Indenture, as originally executed or as the
same may from time to time be supplemented or amended as provided therein.

 
 
<PAGE>   6
                 SECTION 1.2.  NUMBER AND GENDER.  The singular form of any
word used herein, including the terms defined in Section 1.01 of the Indenture,
shall include the plural, and vice versa.  The use herein of a word of any
gender shall include all genders.

                 SECTION 1.3.  ARTICLES, SECTIONS, ETC.  Unless otherwise
specified, references to Articles, Sections and other subdivisions of this
Agreement are to the designated Articles, Sections and other subdivisions of
this Agreement as originally executed.  The words "hereof," "herein,"
"hereunder" and words of similar import refer to this Agreement as a whole.
The headings or titles of the several articles and sections, and the table of
contents appended to copies hereof, shall be solely for convenience of
reference and shall not affect the meaning, construction or effect of the
provisions hereof.


                                   ARTICLE II

                                REPRESENTATIONS

                 SECTION 2.1.  REPRESENTATIONS OF THE ISSUER.  The Issuer makes
the following representations as the basis for its undertakings herein
contained:

                 (a)      The Issuer is a political subdivision of the State of
Nevada.  Under the provisions of the Act, the Issuer has the power to enter
into the transactions contemplated by this Agreement and to carry out its
obligations hereunder.  By proper action, the Issuer has been duly authorized
to execute, deliver and duly perform this Agreement.  To the extent the
representations contained in the immediately preceding two sentences relate to
powers granted to the Issuer under the Act, such representations are made in
reliance on an opinion of Bond Counsel.

                 (b)      To finance the Project the Issuer will issue the
Bonds, which will mature, bear interest and be subject to redemption as
provided in the Indenture.

                 (c)      The Issuer has not pledged and will not pledge its
interest in this Agreement for any purpose other than to secure the Bonds under
the Indenture.

                 (d)      The Issuer is not in default under any of the
provisions of the laws of the State of Nevada which default would affect its
existence or its powers referred to in subsection (a) of this Section 2.1.

                 (e)      The Issuer has found and determined and hereby finds
and determines that all requirements of the Act with respect to the issuance of
the Bonds and the execution of this Agreement have been complied with and that
financing the Project by issuing the Bonds and entering into this Agreement
will be in furtherance of the purposes of the Act.





                                       2
<PAGE>   7
                 (f)      On November 16, 1993, the Issuer adopted its
Resolution No. 11-16-93-1 approving the issuance of the Bonds.

                 (g)      No member, officer or other official of the Issuer
who voted on the adoption of Resolution No. 11-16-93-1 has any interest
whatsoever in this Agreement or in the transactions contemplated hereby.

                 SECTION 2.2.  REPRESENTATIONS OF THE COMPANY.  The Company
makes the following representations as the basis for its undertakings herein
contained:

                 (a)      The Company is a corporation duly formed under the
laws of the State of California, is in good standing in the State of
California, is qualified to do business as a foreign corporation under the laws
of the State of Nevada and has the corporate power to enter into and has duly
authorized, by proper corporate action, the execution and delivery of this
Agreement and all other documents contemplated hereby to be executed by the
Company.

                 (b)      Neither the execution and delivery of this Agreement,
the consummation of the transactions contemplated hereby, nor the fulfillment
of or compliance with the terms and conditions hereof, conflict with or result
in a breach of any of the terms, conditions or provisions of the Company's
Articles of Incorporation or by-laws or of any corporate actions or of any
agreement or instrument to which the Company is now a party or by which it is
bound, or constitute a default (with due notice or the passage of time or both)
under any of the foregoing, or result in the creation or imposition of any
prohibited lien, charge or encumbrance whatsoever upon any of the property or
assets of the Company under the terms of any instrument or agreement to which
the Company is now a party or by which it is bound.

                 (c)      The estimated cost of the Project is as set forth in
the Tax Certificate and has been determined in accordance with sound
engineering principles and certain other principles set forth in the Tax
Certificate.

                 (d)      The Project consists and will consist of those
facilities described in Exhibit A hereto, and in the Southwest Gas Corporation
Engineering Certificate dated December 15, 1993 (the "Engineering
Certificate"), which is hereby incorporated by reference herein, and the
Company shall make no changes to the Project or to the operation thereof which
would affect the qualification of the Project under the Act or impair the
Tax-exempt status of interest on the Bonds.  In particular, the Company has
complied and shall comply with all requirements set forth in the Tax
Certificate.  The Company intends to utilize the Project as facilities for the
local furnishing of gas until the principal of, the premium, if any, and the
interest on the Bonds shall have been paid.





                                       3
<PAGE>   8
                 (e)      The Company has and will have title to the Project,
and all necessary easements to install the Project, sufficient to carry out the
purposes of this Agreement.

                 (f)      At the time of submission of an application to the
Issuer for financial assistance in connection with the Project and on the dates
on which the Issuer took action on such application, permanent financing for
the Project had not otherwise been obtained or arranged.

                 (g)      All certificates, approvals, permits and
authorizations with respect to the construction of the Project of agencies of
applicable local governments, the States of Nevada and California and the
federal government have been obtained or will be obtained in the normal course
of business.


                                  ARTICLE III

             CONSTRUCTION OF THE PROJECT; AMENDMENT OF THE PROJECT;
                             ISSUANCE OF THE BONDS

                 SECTION 3.1.  AGREEMENT TO CONSTRUCT THE PROJECT; AMENDMENT OF
THE PROJECT.  The Company agrees that it will acquire, construct and install,
or complete the acquisition, construction and installation of the Project, and
will acquire, construct and install all other facilities and real and personal
property deemed necessary for the operation of the Project, substantially in
accordance with the plans and specifications prepared therefor by the Company
and approved by the Issuer, including any and all supplements, amendments and
additions or deletions thereto or therefrom, it being understood that the
approval of the Issuer shall not be required for changes in such plans and
specifications which do not alter the purpose and description of the Project as
set forth in Exhibit A hereto.  The Company further agrees to proceed with due
diligence to complete the Project within three years from the date hereof.

                 In the event that the Company desires to amend or supplement
the Project, and such amendment or supplement alters the purpose or description
of the Project as described in Exhibit A hereto, and the Issuer approves of
such amendment or supplement, the Issuer will enter into, and will instruct the
Trustee in writing to consent to, such amendment or supplement upon receipt of:

                 (i)      a certificate of the Authorized Company
         Representative describing in detail the proposed changes and stating
         that they will not have the effect of disqualifying the Project as a
         facility that may be financed pursuant to the Act;

                (ii)      a copy of the proposed form of amended or
         supplemented Exhibit A hereto; and





                                       4
<PAGE>   9
               (iii)      an opinion of Bond Counsel that such proposed changes
         will not affect the Tax-exempt status of interest on any of the Bonds.

                 SECTION 3.2.  AGREEMENT TO ISSUE BONDS; APPLICATION OF BOND
PROCEEDS.  To provide funds to finance the Project as provided in Section 4.1
hereof, the Issuer agrees that it will issue under the Indenture, sell and
cause to be delivered to the purchasers thereof, the Bonds, bearing interest
and maturing as provided in the Indenture.  The Issuer will thereupon deposit
the proceeds received from the sale of the Bonds as provided in the Indenture.

                 SECTION 3.3  DISBURSEMENTS FROM THE CONSTRUCTION FUND AND
COSTS OF ISSUANCE FUND.  (a) The Company will authorize and direct the Trustee,
upon compliance with Section 3.03 of the Indenture, to disburse the moneys in
the Construction Fund to or on behalf of the Company only for the following
purposes as permitted by the Engineering Certificate and the Tax Certificate
(but not including payment of any Costs of Issuance), subject to the provisions
of Section 5.6 hereof:

                 (i)      Payment to the Company of such amounts, if any, as
         shall be necessary to reimburse the Company in full for all advances
         and payments made by it, at any time prior to or after the delivery of
         the Bonds, in connection with (1) the preparation of plans and
         specifications for the Project (including any preliminary study or
         planning of the Project or any aspect thereof), and (2) the
         acquisition, construction and installation of the Project.

                (ii)      Payment for labor, services, materials and supplies
         used by or furnished to the Company to improve the site and to acquire
         and construct the Project, as provided in the plans, specifications
         and work orders therefor; payment of the costs of acquiring,
         constructing and installing utility services or other related
         facilities; payment of the costs of acquiring all real and personal
         property deemed necessary to construct the Project; and payment of the
         miscellaneous expenses incidental to any of the foregoing items.

               (iii)      Payment of the fees, if any, of architects,
         engineers, legal counsel and supervisors expended in connection with
         the acquisition and construction of the Project.

                (iv)      Payment of assessments and other charges, if any,
         that may become payable during the Construction Period with respect to
         the Project, or reimbursement thereof, if paid by the Company.





                                       5
<PAGE>   10
                 (v)      Payment of expenses incurred in seeking to enforce
         any remedy against any contractor or subcontractor in respect of any
         default under a contract relating to the acquisition, construction or
         installation of the Project.

                (vi)      Interest paid during the Construction Period and
properly chargeable to the capital account of the Project.

               (vii)      Payment of any other Costs of the Project.

                 (b)      All moneys remaining in the Construction Fund after
the Completion Date and after payment or provision for payment of all other
items provided for in subsection (a) of this Section shall be used in
accordance with Section 3.03 of the Indenture.

                 (c)      Each of the payments referred to in subsection (a) of
this Section shall be made upon receipt by the Trustee of a written requisition
in the form prescribed by Section 3.03 of the Indenture, signed by the
Authorized Company Representative.

                 (d)      The Company will authorize and direct the Trustee,
upon compliance with Section 3.04 of the Indenture, to disburse the moneys in
the Costs of Issuance Fund to or on behalf of the Company only for Costs of
Issuance of the Bonds, subject to the provisions of Section 5.6 hereof.  Each
of the payments referred to in this Section 3.3(d) shall be made upon receipt
by the Trustee of a written requisition in the form prescribed by Section 3.04
of the Indenture, signed by the Authorized Company Representative.

                 (e)  The Trustee may rely on any written requisition delivered
to it by the Company pursuant to paragraph (c) or (d) above as conclusive
evidence that payment of the items listed therein is permitted by the
Engineering Certificate and the Tax Certificate.

                 SECTION 3.4.  ESTABLISHMENT OF COMPLETION DATE; OBLIGATION OF
COMPANY TO COMPLETE.  As soon as the Project is completed, the Authorized
Company Representative, on behalf of the Company, shall evidence the Completion
Date by providing a certificate to the Trustee and the Issuer stating the Cost
of the Project and further stating that (i) construction of the Project has
been completed substantially in accordance with the plans, specifications and
work orders therefor, and all labor, services, materials and supplies used in
construction have been paid for, and (ii) all other facilities necessary in
connection with the Project have been acquired, constructed and installed in
accordance with the plans and specifications and work orders therefor and all
costs and expenses incurred in connection therewith have been paid.
Notwithstanding the foregoing, such certificate may state that it is given
without prejudice to any rights of the Company against third parties for the
payment of any amount not then due and payable which exist at the date of such
certificate or which may subsequently exist.





                                       6
<PAGE>   11
                 At the time such certificate is delivered to the Trustee,
moneys remaining in the Construction Fund, including any earnings resulting
from the investment of such moneys, shall be transferred to the Surplus Account
and used as provided in Section 3.03 of the Indenture.  In the event that the
amount on deposit in the Surplus Account after such transfer is insufficient to
redeem Bonds in a principal amount divisible by Authorized Denominations, the
Company shall pay to the Trustee for deposit in the Surplus Account the minimum
amount which, together with amounts transferred from the Construction Fund to
such account pursuant to Section 3.03 of the Indenture, shall be sufficient to
redeem Bonds in the next largest principal amount divisible by Authorized
Denominations.

                 In the event the moneys in the Construction Fund available for
payment of the Cost of the Project should be insufficient to pay the costs
thereof in full, the Company agrees to pay directly, or to deposit in the
Construction Fund moneys sufficient to pay, any costs of completing the Project
in excess of the moneys available for such purpose in the Construction Fund.
The Issuer makes no express or implied warranty that the moneys deposited in
the Construction Fund and available for payment of the Cost of the Project,
under the provisions of this Agreement, will be sufficient to pay all the
amounts which may be incurred for the Cost of the Project.  The Company agrees
that if, after exhaustion of the moneys in the Construction Fund, the Company
should pay, or deposit moneys in the Construction Fund for the payment of, any
portion of the Cost of the Project pursuant to the provisions of this Section,
it shall not be entitled to any reimbursement therefor from the Issuer, from
the Trustee or from the holders of any of the Bonds, nor shall it be entitled
to any diminution of the amounts payable under Section 4.2 hereof.

                 SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS.  Any moneys in
any fund held by the Trustee shall, at the written request of the Authorized
Company Representative, be invested or reinvested by the Trustee as provided in
the Indenture, subject to Section 5.6 hereof.  Such investments shall be held
by the Trustee and shall be deemed at all times a part of the fund from which
such investments were made, and the interest accruing thereon, and any profit
or loss realized therefrom, except as otherwise provided in the Indenture,
shall be credited or charged to such fund.


                                   ARTICLE IV

                     LOAN OF PROCEEDS; REPAYMENT PROVISIONS

                 SECTION 4.1.  LOAN OF BOND PROCEEDS.  The Issuer covenants and
agrees, upon the terms and conditions in this Agreement, to make a loan to the
Company for the purpose of financing the Project and paying Costs of Issuance.
Pursuant to said covenant and agreement, the Issuer will issue the Bonds upon





                                       7
<PAGE>   12
the terms and conditions contained in this Agreement and the Indenture and will
cause the Bond proceeds to be applied as provided in Article III of the
Indenture.  Such proceeds shall be disbursed as provided in Section 3.02 of the
Indenture.

                 SECTION 4.2.  REPAYMENT AND PAYMENT OF OTHER AMOUNTS PAYABLE.
The Company agrees to make the payments required by subsections (a) through (d)
of this Section as Repayment Installments on the loan to the Company from Bond
proceeds pursuant to Section 4.1 hereof.

                 (a)      The Company covenants and agrees to pay to the
Trustee as a Repayment Installment on such loan, not later than each date
provided in or pursuant to the Indenture for the payment of principal (whether
at maturity or upon redemption or acceleration) of, premium, if any, and/or
interest on the Bonds, until the principal of, premium, if any, and interest on
the Bonds shall have been fully paid or provision for the payment thereof shall
have been made in accordance with the Indenture, in immediately available
funds, for deposit in the Bond Fund, a sum equal to the amount payable on such
interest or principal payment or redemption or acceleration date as principal
of (whether at maturity or upon redemption or acceleration), premium, if any,
and interest upon the Bonds as provided in the Indenture.

                 Each payment pursuant to this Section 4.2(a) shall at all
times be sufficient to pay the total amount of interest and principal (whether
at maturity or upon redemption or acceleration) and premium, if any, payable on
the Bonds on the date of payment of principal or interest, as the case may be;
provided that any amount held by the Trustee in the Bond Fund on any due date
for a Repayment Installment hereunder shall be credited against the installment
due on such date to the extent available for such purpose; and provided further
that, subject to the provisions of this paragraph, if at any time the Company
determines that amounts held by the Trustee in the Bond Fund are sufficient to
pay all of the principal of and interest and premium, if any, on the Bonds as
such payments become due, the Company shall be relieved of any obligation to
make any further payments under the provisions of this Section.
Notwithstanding the foregoing, if on any date the amount held by the Trustee in
the Bond Fund is insufficient to make any required payments of principal of
(whether at maturity or upon redemption or acceleration) and interest and
premium, if any, on the Bonds as such payments become due, the Company shall
forthwith pay such deficiency as a Repayment Installment hereunder.

                 (b)      The Company also agrees to pay to the Trustee until
the principal of, premium, if any, and interest on the Bonds shall have been
fully paid or provision for the payment thereof shall have been made as
required by the Indenture, (i) the annual fee of the Trustee for its ordinary
services rendered as trustee, and its ordinary expenses incurred under the
Indenture, as and when the same become due, (ii) the reasonable fees, charges
and expenses of the Trustee (including the





                                       8
<PAGE>   13
reasonable fees and expenses of its counsel), as provided in the Indenture, as
and when the same become due, including fees, charges and expenses relating to
the interpretation, enforcement or amendment of this Agreement or the
Indenture, (iii) the cost of printing any Bonds required to be furnished by the
Issuer, and (iv) any amounts required to be deposited in the Rebate Fund to
comply with the provisions of Section 5.6 hereof.  The Company will also pay
reasonable fees, charges and expenses of the Trustee as required by the
Indenture following provision for payment of the Bonds.

                 (c)      The Company also agrees to pay, within sixty (60)
days after receipt of request for payment thereof, all expenses required to be
paid by the Company under the terms of the Bond Purchase Agreement, and all
fees and reasonable expenses of the Issuer related to issuance of the Bonds or
the interpretation, enforcement or amendment of this Agreement or the Indenture
which are not otherwise required to be paid by the Company under the terms of
this Agreement; provided that the Issuer shall have obtained the prior written
approval of the Authorized Company Representative (which approval shall not be
unreasonably withheld) for any expenditures other than those provided for
herein or in the Bond Purchase Agreement.

                 (d)      In the event the Company should fail to make any of
the payments required by subsections (a) through (c) of this Section in respect
of any Bonds, such payments shall continue as obligations of the Company until
such amounts shall have been fully paid.  The Company agrees to pay overdue
payments under subsection (a) of this Section, together with interest thereon
until paid, to the extent permitted by law, at the rate of interest per annum
borne by the Bonds.

                 SECTION 4.3.  UNCONDITIONAL OBLIGATION.  The obligations of
the Company to make the payments required by Section 4.2 hereof and to perform
and observe the other agreements on its part contained herein shall be absolute
and unconditional, irrespective of any defense or any rights of set-off,
recoupment or counterclaim it might otherwise have against the Issuer; and
during the term of this Agreement, the Company shall pay absolutely net the
payments to be made on account of the loan as prescribed in Section 4.2 and all
other payments required hereunder, free of any deductions and without
abatement, diminution or set-off.  Until such time as the principal of,
premium, if any, and interest on the Bonds shall have been fully paid, or
provision for the payment thereof shall have been made as required by the
Indenture, the Company (i) will not suspend or discontinue any payments
provided for in Section 4.2 hereof; (ii) will perform and observe all of its
other covenants contained in this Agreement; and (iii) will not terminate this
Agreement for any cause, including, without limitation, failure to complete the
Project, the occurrence of any act or circumstances that may constitute failure
of consideration, destruction of or damage to the Project, commercial
frustration of purpose, any change in the tax or other





                                       9
<PAGE>   14
laws of the United States of America or of the State of Nevada or any political
subdivision of either of these, or any failure of the Issuer or the Trustee to
perform and observe any covenant, whether express or implied, or any duty,
liability or obligation arising out of or connected with this Agreement or the
Indenture, except to the extent permitted by this Agreement.

                 SECTION 4.4.  ASSIGNMENT OF ISSUER'S RIGHTS.  As security for
the payment of the Bonds, the Issuer will assign to the Trustee the Issuer's
rights under this Agreement, including the right to receive payments hereunder
(except the right of the Issuer to receive certain payments, if any, with
respect to expenses and indemnification under Sections 4.2(c), 6.3, 8.2 and 8.3
hereof and the right of the Issuer to consent to amendments to the Project
pursuant to Section 3.1 hereof), and the Issuer hereby directs the Company to
make the payments required hereunder (except such payments for expenses and
indemnification of the Issuer) directly to the Trustee.  The Company hereby
assents to such assignment and agrees to make payments directly to the Trustee
without defense or set-off by reason of any dispute between the Company and the
Issuer or the Trustee.

                 SECTION 4.5.  AMOUNTS REMAINING IN FUNDS. It is agreed by the
parties hereto that after payment in full of (i) the Bonds, or after provision
for such payment shall have been made as provided in the Indenture, (ii) the
fees, charges and expenses of the Trustee, any paying agents and the Issuer in
accordance with the Indenture and (iii) all other amounts required to be paid
under this Agreement and the Indenture, including, without limitation, amounts
required to be paid from the Rebate Fund, any amounts remaining in any fund
held by the Trustee under the Indenture shall belong to the Company and be paid
to the Company by the Trustee.


                                   ARTICLE V

                        SPECIAL COVENANTS AND AGREEMENTS

                 SECTION 5.1.  RIGHT OF ACCESS TO THE PROJECT AND RECORDS.  The
Company agrees that during the term of this Agreement the Issuer, the Trustee
and the duly authorized agents of either of them shall have the right at all
reasonable times during normal business hours to examine the books and records
of the Company with respect to the Project and to enter upon the site of the
Project to examine and inspect the Project; provided, however, that this right
is subject to federal and State of Nevada laws and regulations applicable to
the site of the Project; and provided, further, that such right of access to
the site of the Project shall not be construed to require the excavation of any
subterranean portions of the Project or any other extraordinary measures which
might disturb the Project's normal operation.  The rights of access hereby
reserved to the Issuer and the Trustee may be exercised only after such agent
shall have executed release of liability and secrecy agreements





                                       10
<PAGE>   15
if requested by the Company in the form then currently used by the Company, and
nothing contained in this Section or in any other provision of this Agreement
shall be construed to entitle the Issuer or the Trustee to any information or
inspection involving the confidential know-how of the Company.

                 SECTION 5.2.  THE COMPANY'S MAINTENANCE OF ITS EXISTENCE;
ASSIGNMENTS.

                 (a)      The Company agrees that during the term of this
Agreement it will maintain its corporate existence in good standing and will
not dissolve or otherwise dispose of all or substantially all of its assets and
will not consolidate with or merge into another corporation or permit one or
more other corporations to consolidate or merge into it; provided, that the
Company may, without violating the covenants contained in this Section,
consolidate with or merge into another corporation, or permit one or more other
corporations to consolidate with or merge into it, or sell or otherwise
transfer to another corporation all or substantially all of its assets and
thereafter dissolve, provided that (1) either (A) the Company is the surviving
corporation or (B) the surviving, resulting or transferee corporation, as the
case may be, (i) assumes and agrees in writing to pay and perform all of the
obligations of the Company hereunder, and (ii) qualifies to do business in the
State of Nevada; and (2) the Company shall deliver to the Trustee an opinion of
Bond Counsel to the effect that such consolidation, merger or transfer and
dissolution does not in and of itself adversely affect the exclusion from gross
income for federal income tax purposes of interest on the Bonds.

                 (b)      The rights and obligations of the Company under this
Agreement may be assigned by the Company, with the written consent of the
Issuer, in whole or in part subject, however, to each of the following
conditions:

                          (i)     No assignment (other than pursuant to a
combination, consolidation or merger described in Section 5.2(a)) shall relieve
the Company from primary liability for any of its obligations hereunder, and in
the event of any assignment not pursuant to Section 5.2(a), the Company shall
continue to remain primarily liable for the payments specified in Section 4.2
hereof and for performance and observance of the other agreements on its part
herein provided to be performed and observed by it.

                        (ii)      Any assignment from the Company shall retain
for the Company such rights and interests as will permit it to perform its
obligations under this Agreement, and any assignee from the Company shall
assume the obligations of the Company hereunder to the extent of the interest
assigned.

                       (iii)      The Company shall, within thirty days after
such assignment, furnish or cause to be furnished to the Issuer and the Trustee
a true and complete copy of each such assignment together with an instrument of
assumption.





                                       11
<PAGE>   16
                        (iv)      The Company shall cause to be delivered to
the Issuer and the Trustee an opinion of Bond Counsel that such assignment will
not, in and of itself, result in the interest on the Bonds being determined to
be includable in the gross income for federal income tax purposes of the owners
thereof.

                 SECTION 5.3.  NOTICE AND CERTIFICATES TO TRUSTEE.  The Company
hereby agrees to provide the Trustee with the following:

                          (a)     On or before the fifth (5th) Business Day
         following each Interest Payment Date while any of the Bonds are
         Outstanding, a certificate of an Authorized Company Representative
         (which complies with Section 1.04 of the Indenture) that all payments
         required under this Agreement have been made;

                          (b)     Within one hundred twenty (120) days after
         the end of each fiscal year of the Company, (i) a certificate of an
         Authorized Company Representative (which complies with Section 1.04 of
         the Indenture) to the effect that all payments have been made under
         this Agreement and that, to the best of such officer's knowledge,
         there exists no Event of Default or event which, with the passage of
         time or the giving of notice, or both, would become an Event of
         Default, or, if any default or Event of Default exists, a description
         thereof and (ii) the audited annual report of the Company for such
         fiscal year; and

                          (c)     Upon knowledge of an Event of Default under
         this Agreement or the Indenture, notice of such Event of Default, such
         notice to include a description of the nature of such event and what
         steps are being taken to remedy such Event of Default.

                 SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES; UTILITY AND OTHER
CHARGES; INSURANCE.  The Company agrees to maintain, to the extent permitted by
applicable law and regulation, the Project, or cause the Project to be so
maintained, during the term of this Agreement (i) in as reasonably safe
condition as its operations shall permit and (ii) in good repair and in good
operating condition, ordinary wear and tear excepted, making from time to time
all necessary repairs thereto and renewals and replacements thereof.

                 The Company agrees to pay or cause to be paid during the term
of this Agreement all taxes, governmental charges of any kind lawfully assessed
or levied upon the Project or any part thereof, all utility and other charges
incurred in the operation, maintenance, use, occupancy and upkeep of the
Project and all assessments and charges lawfully made by any governmental body
for public improvements that may be secured by a lien on the Project, provided
that with respect to special assessments or other governmental charges that may
lawfully be paid in installments over a period of years, the Company shall be
obligated to pay only such installments as are required to be





                                       12
<PAGE>   17
paid during the term of this Agreement.  The Company may, at the Company's
expense and in the Company's name, in good faith, contest any such taxes,
assessments and other charges and, in the event of any such contest, may permit
the taxes, assessments or other charges so contested to remain unpaid during
that period of such contest and any appeal therefrom unless by such nonpayment
the Project or any part thereof will be subject to loss or forfeiture.

                 The Company agrees that it will keep, or cause to be kept, (i)
the Project insured against such risks and in such amounts as are consistent
with its insurance practices for similar types of facilities (which may include
self-insurance), and (ii) insurance against all direct or contingent loss or
liability for personal injury, death or property damage occasioned by the
operation of the Project, which insurance may be a part of the policy or
policies of insurance customarily maintained by the Company in connection with
its general property and liability insurance upon all of the plants and
properties operated by it (including such deductibles as may be provided in
said policies).

                 SECTION 5.5.  QUALIFICATION IN NEVADA.  The Company agrees
that throughout the term of this Agreement it, or any successor or assignee as
permitted by Section 5.2, will be qualified to do business in the State of
Nevada.

                 SECTION 5.6.  TAX EXEMPT STATUS OF BONDS.  It is the intention
of the Company that interest on the Bonds shall be and remain Tax-exempt.  To
that end the covenants and agreements of the Company in this Section are for
the benefit of the Trustee and each and every holder of the Bonds.

                 The Company represents and warrants that substantially all of
the proceeds of the Bonds will be used with respect to the Project as more
specifically set forth in the Tax Certificate and the Engineering Certificate.

                 The Company covenants and agrees that it has not taken or
permitted to be taken and will not take or permit to be taken any action which
will cause the interest on the Bonds not to be Tax-exempt; provided that the
Company shall not have violated this covenant if the interest on any of the
Bonds becomes taxable to a person solely because such person is a "substantial
user" of the Project or a "related person" within the meaning of Section 147(a)
of the Code; and provided further that none of the covenants and agreements
herein contained shall require the Company to enter an appearance or intervene
in any administrative, legislative or judicial proceeding in connection with
any changes in applicable laws, rules or regulations or in connection with any
decisions of any court or administrative agency or other governmental body
affecting the taxation of interest on the Bonds.





                                       13
<PAGE>   18
                 The Company acknowledges having read Section 5.08 of the
Indenture and agrees to perform all duties imposed upon it by such Section 5.08
of the Indenture, by the Tax Certificate and by the Engineering Certificate.
Insofar as said Section 5.08 of the Indenture, the Tax Certificate and the
Engineering Certificate impose duties and responsibilities on the Company, they
are specifically incorporated herein by reference.


                                   ARTICLE VI

                         EVENTS OF DEFAULT AND REMEDIES

                 SECTION 6.1.  EVENTS OF DEFAULT.  Any one of the following
which occurs and continues shall constitute an Event of Default:

                          (a)     failure by the Company to pay any amounts
         required to be paid under Section 4.2(a) hereof when due;

                          (b)     failure of the Company to observe and perform
         any covenant, condition or agreement on its part required to be
         observed or performed by this Agreement, other than making the
         payments referred to in (a) above, which continues for a period of
         ninety (90) days after written notice, which notice shall specify such
         failure and request that it be remedied, given to the Company by the
         Issuer or the Trustee, unless the Issuer and the Trustee shall agree
         in writing to an extension of such time; provided, however, that if
         the failure stated in the notice can be corrected, but cannot be
         corrected within such period, the Issuer and the Trustee will not
         unreasonably withhold their consent to an extension of such time if
         corrective action is instituted within such period and diligently
         pursued until the default is corrected; or

                          (c)     an Act of Bankruptcy of the Company.

The provisions of subsection (b) of this Section are subject to the limitation
that the Company shall not be deemed in default if and so long as the Company
is unable to carry out its agreements hereunder by reason of strikes, lockouts
or other industrial disturbances; acts of public enemies; orders of any kind of
the government of the United States or of the States of Nevada or California or
any of their departments, agencies, or officials, or any civil or military
authority; insurrections; riots; epidemics; landslides; lightning; earthquake;
fire; hurricanes; storms; floods; washouts; droughts; arrests; restraint of
government and people; civil disturbances; explosions; breakage or accident to
machinery, transmission pipes or canals; partial or entire failure of
utilities; or any other cause or event not reasonably within the control of the
Company; it being agreed that the settlement of strikes, lockouts and other
industrial disturbances shall be entirely within the discretion of the Company,
and the Company shall not be required to make settlement





                                       14
<PAGE>   19
of strikes, lockouts and other industrial disturbances by acceding to the
demands of the opposing party or parties when such course is, in the judgment
of the Company, unfavorable to the Company.  This limitation shall not apply to
any default under subsections (a) or (c) of this Section.

                 SECTION 6.2.  REMEDIES ON DEFAULT.  Whenever any Event of
Default shall have occurred and shall continue:

                          (a)     The Trustee, by written notice to the
         Company, shall declare the unpaid balance of the loan payable under
         Section 4.2(a) of this Agreement to be due and payable immediately, if
         concurrently with or prior to such notice the unpaid principal amount
         of the Bonds shall have been declared to be due and payable.  Upon any
         such declaration such amount shall become and shall be immediately due
         and payable as set forth in Section 7.01 of the Indenture.

                          (b)     The Trustee may have access to and may
         inspect, examine and make copies of the books and records and any and
         all accounts, data and federal income tax and other tax returns of the
         Company.

                          (c)     The Issuer or the Trustee may take whatever
         action at law or in equity as may be necessary or desirable to collect
         the payments and other amounts then due and thereafter to become due
         or to enforce performance and observance of any obligation, agreement
         or covenant of the Company under this Agreement.

                 In case the Trustee or the Issuer shall have proceeded to
enforce its rights under this Agreement and such proceedings shall have been
discontinued or abandoned for any reason or shall have been determined
adversely to the Trustee or the Issuer, then, and in every such case, the
Company, the Trustee and the Issuer shall be restored respectively to their
several positions and rights hereunder, and all rights, remedies and powers of
the Company, the Trustee and the Issuer shall continue as though no such action
had been taken.

                 The Company covenants that, in case an Event of Default shall
occur with respect to the payment of any Repayment Installment payable under
Section 4.2(a) hereof, then the Company will pay to the Trustee the whole
amount that then shall have become due and payable under said Section, with
interest, to the extent permitted by law, on the amount then overdue at the
rate of interest per annum borne by the Bonds until such amount has been paid.

                 In case the Company shall fail forthwith to pay such amounts
upon demand of the Trustee, the Trustee shall be entitled and empowered to
institute any action or proceeding at law or in equity for the collection of
the sums so due and unpaid, and may prosecute any such action or proceeding to
judgment or final





                                       15
<PAGE>   20
decree, and may enforce any such judgment or final decree against the Company
and collect in the manner provided by law the moneys adjudged or decreed to be
payable.

                 In case proceedings shall be pending for the bankruptcy or for
the reorganization of the Company under the federal bankruptcy laws or any
other applicable law, or in case a receiver or trustee shall have been
appointed for the property of the Company or in the case of any other similar
judicial proceedings relative to the Company, or the creditors or property of
the Company, then the Trustee shall be entitled and empowered, by intervention
in such proceedings or otherwise, to file and prove a claim or claims for the
whole amount owing and unpaid pursuant to this Agreement and, in case of any
judicial proceedings, to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee allowed in such judicial proceedings relative to the Company, its
creditors or its property, and to collect and receive any moneys or other
property payable or deliverable on any such claims, and to distribute such
amounts as provided in the Indenture after the deduction of its charges and
expenses.  Any receiver, assignee or trustee in bankruptcy or reorganization is
hereby authorized to make such payments to the Trustee, and to pay to the
Trustee any amount due it for compensation and expenses, including expenses and
fees of counsel incurred by it up to the date of such distribution.

                 SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND EXPENSES.
In the event the Company should default under any of the provisions of this
Agreement and the Issuer or the Trustee should employ attorneys or incur other
expenses for the collection of the payments due under this Agreement or the
Indenture or the enforcement of performance or observance of any obligation or
agreement on the part of the Company herein contained, the Company agrees to
pay to the Issuer and the Trustee the reasonable fees of their respective
attorneys and such other expenses so incurred by the Issuer and the Trustee.

                 SECTION 6.4.  NO REMEDY EXCLUSIVE.  No remedy herein conferred
upon or reserved to the Issuer or the Trustee is intended to be exclusive of
any other available remedy or remedies, but each and every such remedy shall be
cumulative and shall be in addition to every other remedy given under this
Agreement or now or hereafter existing at law or in equity or by statute.  No
delay or omission to exercise any right or power accruing upon any default
shall impair any such right or power or shall be construed to be a waiver
thereof, but any such right and power may be exercised from time to time and as
often as may be deemed expedient.  In order to entitle the Issuer or the
Trustee to exercise any remedy reserved to it in this Article, it shall not be
necessary to give any notice, other than such notice as may be herein expressly
required.  Such rights and remedies as are given the Issuer hereunder shall
also extend to the Trustee, and the Trustee and the holders of the Bonds shall
be deemed





                                       16
<PAGE>   21
third party beneficiaries of all covenants and agreements herein contained.

                 SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE WAIVER.  In
the event any agreement or covenant contained in this Agreement should be
breached by the Company and thereafter waived by the Issuer or the Trustee,
such waiver shall be a one-time waiver limited to the particular breach so
waived and shall not be deemed to waive any other breach hereunder.


                                  ARTICLE VII

                                   PREPAYMENT

                 SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT MONEYS.  By
virtue of the assignment of the rights of the Issuer under this Agreement to
the Trustee as is provided in Section 4.4 hereof, the Company agrees to and
shall pay directly to the Trustee any amount permitted or required to be paid
by it under this Article VII.  The Trustee shall use the moneys so paid to it
by the Company to redeem the Bonds on the date set for such redemption pursuant
to Section 7.5 hereof.

                 SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS.  The Company
shall have the option to prepay the amounts payable under Section 4.2 hereof
with respect to the Bonds, in whole or in part, by paying to the Trustee, for
deposit in the Bond Fund, the amount set forth in Section 7.4 hereof, under
circumstances set forth in Sections 4.01(a) and 4.01(b) of the Indenture.  The
Company shall notify the Trustee and the Issuer in writing of its election to
prepay the amounts payable hereunder and direct the Trustee to cause the Bonds
to be redeemed on a date specified, which shall be at least forty-five (45)
days after the date of such notice.

                 SECTION 7.3.  MANDATORY PREPAYMENT.  The Company shall have
and hereby accepts the obligation to prepay Repayment Installments with respect
to the Bonds to the extent mandatory redemption of the Bonds is required
pursuant to Section 4.01(c) of the Indenture.  The Company shall (i) satisfy
its obligation hereunder by prepaying such Repayment Installments within one
hundred eighty (180) days after the occurrence of a Determination of
Taxability, in the case of mandatory redemption pursuant to Section 4.01(c)(i)
of the Indenture; or (ii) be deemed to satisfy its obligation hereunder upon
the transfer by the Trustee of remaining amounts on deposit in the Construction
Fund to the Bond Fund, in the case of mandatory redemption pursuant to Section
4.01(c)(ii) of the Indenture, provided that within ten (10) days after such
transfer the Company shall pay to the Trustee any additional amounts required
pursuant to Section 3.4 or Section 7.4 hereof.  The amount payable by the
Company in the event of a prepayment required by this Section shall be
determined as set forth in Section 7.4 hereof and shall be deposited in the
Bond Fund.





                                       17
<PAGE>   22
                 SECTION 7.4.  AMOUNT OF PREPAYMENT.  In the case of a
prepayment of the entire amount due hereunder with respect to the Bonds
pursuant to Section 7.2 or 7.3 hereof, the amount to be paid shall be a sum
sufficient, together with other funds and the yield on any securities deposited
with the Trustee and available without reinvestment for such purpose, to pay
(1) the principal of all Bonds Outstanding on the redemption date specified in
the notice of redemption, plus interest accrued and to accrue to the payment or
redemption date of the Bonds, plus premium, if any, required pursuant to the
Indenture, (2) all reasonable and necessary fees and expenses of the Issuer,
the Trustee and any paying agent accrued and to accrue through final payment of
the Bonds, and (3) all other liabilities of the Company accrued and to accrue
with respect to the Bonds under this Agreement.

                 In the case of partial prepayment of the Repayment
Installments pursuant to Section 7.2 or 7.3 hereof, the amount payable shall be
a sum sufficient, together with other funds deposited with the Trustee and
available without reinvestment for such purpose, to pay the principal amount of
and premium, if any, and accrued interest on the Bonds to be redeemed, as
provided in the Indenture, and to pay the expenses of redemption of the Bonds.

                 SECTION 7.5.  NOTICE OF PREPAYMENT.  To exercise an option
granted in or to perform an obligation required by this Article VII, the
Company shall give written notice to the Issuer and the Trustee at least
fifteen (15) days prior to the last day by which the Trustee is permitted to
give notice of redemption pursuant to Section 4.03 of the Indenture, specifying
the date upon which any prepayment will be made.  If, in the case of a
mandatory prepayment pursuant to Section 7.3 hereof, the Company fails to give
such notice of a prepayment required by this Section 7.5, such notice may be
given by the Issuer, by the Trustee or by any holder or holders of ten percent
(10%) or more in aggregate principal amount of the Bonds Outstanding.  The
Issuer and the Trustee, at the request of the Company or any such Bondholder,
shall forthwith take all steps necessary under the applicable provisions of the
Indenture to effect redemption of all or part of the then Outstanding Bonds, on
the earliest practicable date thereafter on which such redemption may be made
under applicable provisions of the Indenture (except that neither the Issuer
nor the Trustee shall be required to make payment of any money required for
such redemption).


                                  ARTICLE VIII

               NON-LIABILITY OF ISSUER; EXPENSES; INDEMNIFICATION

                 SECTION 8.1.  NON-LIABILITY OF ISSUER.  The Issuer shall not
be obligated to pay the principal of, or premium, if any, or interest on the
Bonds, except from Revenues.  The Company hereby acknowledges that the Issuer's
sole source of moneys to repay the Bonds will be provided by the payments made
by the





                                       18
<PAGE>   23
Company pursuant to this Agreement, together with other Revenues, including
investment income on certain funds and accounts held by the Trustee under the
Indenture, and hereby agrees that if the payments to be made hereunder shall
ever prove insufficient to pay all principal of, and premium, if any, and
interest on the Bonds as the same shall become due (whether by maturity,
redemption, acceleration or otherwise), then upon notice from the Trustee, the
Company shall pay such amounts as are required from time to time to prevent any
deficiency or default in the payment of such principal, premium or interest,
including, but not limited to, any deficiency caused by acts, omissions,
nonfeasance or malfeasance on the part of the Trustee, the Company, the Issuer
or any third party.

                 SECTION 8.2.  EXPENSES.  The Company covenants and agrees to
pay and to indemnify the Issuer and the Trustee against all costs and charges,
including reasonable fees and disbursements of attorneys, accountants,
consultants and other experts, incurred in good faith in connection with this
Agreement, the Bonds or the Indenture.

                 SECTION 8.3.  INDEMNIFICATION.  (a) The Company releases the
Issuer from, and covenants and agrees that the Issuer shall not be liable for,
and covenants and agrees, to the extent permitted by law, to indemnify and hold
harmless the Issuer and its directors, officers, employees and agents from and
against, any and all losses, claims, damages, liabilities or expenses, of every
conceivable kind, character and nature whatsoever arising out of, resulting
from or in any way connected with (1) the Project, or the conditions,
occupancy, use, possession, conduct or management of, or work done in or about,
or from the planning, design, acquisition, installation or construction of the
Project or any part thereof; (2) the issuance of any Bonds or any
certifications, covenants or representations made in connection therewith and
the carrying out of any of the transactions contemplated by the Bonds and this
Agreement; (3) the Trustee's acceptance or administration of the trusts under
the Indenture, or the exercise or performance of any of its powers or duties
under the Indenture; or (4) any untrue statement or alleged untrue statement of
any material fact or omission or alleged omission to state a material fact
necessary to make the statements made, in light of the circumstances under
which they were made, not misleading, in any limited offering memorandum,
official statement or other offering circular utilized by the Issuer or any
underwriter or placement agent in connection with the sale of any Bonds;
provided that such indemnity shall not be required for damages that result from
willful misconduct on the part of the party seeking such indemnity.  The
Company further covenants and agrees, to the extent permitted by law, to pay or
to reimburse the Issuer and its officers, employees and agents for any and all
costs, reasonable attorneys fees, liabilities or expenses incurred in
connection with investigating, defending against or otherwise in connection
with any such losses, claims, damages, liabilities, expenses or actions, except
to the extent that the same arise out of the willful misconduct of the party





                                       19
<PAGE>   24
claiming such payment or reimbursement.  The provisions of this paragraph shall
survive the retirement of the Bonds.

                 (b)      The Company releases the Trustee from, and covenants
and agrees that the Trustee shall not be liable for, and covenants and agrees,
to the extent permitted by law, to indemnify and hold harmless the Trustee and
its directors, officers, employees and agents from and against, any and all
losses, claims, damages, liabilities or expenses, of every conceivable kind,
character and nature whatsoever arising out of, resulting from or in any way
connected with (1) the Project, or the conditions, occupancy, use, possession,
conduct or management of, or work done in or about, or from the planning,
design, acquisition, installation or construction of the Project or any part
thereof; (2) the issuance of any Bonds or any certifications, covenants or
representations made in connection therewith and the carrying out of any of the
transactions contemplated by the Bonds and this Agreement; (3) the Trustee's
acceptance or administration of the trusts under the Indenture, or the exercise
or performance of any of its powers or duties under the Indenture; or (4) any
untrue statement or alleged untrue statement of any material fact or omission
or alleged omission to state a material fact necessary to make the statements
made, in light of the circumstances under which they were made, not misleading,
in any limited offering memorandum, official statement or other offering
circular utilized by the Issuer or any underwriter or placement agent in
connection with the sale of any Bonds; provided that such indemnity shall not
be required for damages that result from negligence or willful misconduct on
the part of the party seeking such indemnity.  The Company further covenants
and agrees, to the extent permitted by law, to pay or to reimburse the Trustee
and its officers, employees and agents for any and all costs, reasonable
attorneys fees, liabilities or expenses incurred in connection with
investigating, defending against or otherwise in connection with any such
losses, claims, damages, liabilities, expenses or actions, except to the extent
that the same arise out of the negligence or willful misconduct of the party
claiming such payment or reimbursement.  The provisions of this paragraph shall
survive the retirement of the Bonds.


                                   ARTICLE IX

                                 MISCELLANEOUS

                 SECTION 9.1.  NOTICES.  All notices, certificates or other
communications shall be deemed sufficiently given on the second day following
the day on which the same have been mailed by first-class mail, postage
prepaid, or by telecopy or similar facsimile transmission capable of making a
written record, addressed to the Issuer, the Company or the Trustee at the
addresses specified in Section 11.07 of the Indenture.  A duplicate copy of
each notice, certificate or other communication given hereunder by either the
Issuer or the Company to the other





                                       20
<PAGE>   25
shall also be given to the Trustee.  The Issuer, the Company, and the Trustee
may, by notice given hereunder, designate any different addresses to which
subsequent notices, certificates or other communications shall be sent.

                 SECTION 9.2.  SEVERABILITY.  If any provision of this
Agreement shall be held or deemed to be, or shall in fact be, illegal,
inoperative or unenforceable, the same shall not affect any other provision or
provisions herein contained or render the same invalid, inoperative, or
unenforceable to any extent whatever.

                 SECTION 9.3.  EXECUTION OF COUNTERPARTS.  This Agreement may
be simultaneously executed in several counterparts, each of which shall be an
original and all of which shall constitute but one and the same instrument;
provided, however, that for purposes of perfecting a security interest in this
Agreement by the Trustee under Article 9 of the Nevada Uniform Commercial Code,
only the counterpart delivered, pledged, and assigned to the Trustee shall be
deemed the original.

                 SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS.  Except
as otherwise provided in this Agreement or the Indenture, subsequent to the
initial issuance of Bonds and prior to their payment in full, or provision for
such payment having been made as provided in the Indenture, this Agreement may
not be effectively amended, changed, modified, altered or terminated without
the written consent of the Trustee.

                 SECTION 9.5.  GOVERNING LAW.  This Agreement shall be governed
exclusively by and construed in accordance with the applicable laws of the
State of Nevada, except that any obligations and duties of the Trustee shall be
governed by the laws of the State of New York.

                 SECTION 9.6.  AUTHORIZED COMPANY REPRESENTATIVE.  Whenever
under the provisions of this Agreement the approval of the Company is required
or the Issuer or the Trustee is required to take some action at the request of
the Company, such approval or such request shall be given on behalf of the
Company by the  Authorized Company Representative, and the Issuer and the
Trustee shall be authorized to act on any such approval or request without
liability and neither party hereto shall have any complaint against the other
or against the Trustee as a result of any such action taken.

                 SECTION 9.7.  TERM OF THE AGREEMENT.  This Agreement shall be
in full force and effect from the date hereof and shall continue in effect as
long as any of the Bonds are Outstanding or the Trustee holds any moneys under
the Indenture, whichever is later; provided, however, that the rights of the
Trustee and the Issuer under Sections 8.2 and 8.3 hereof shall survive the
termination of this Agreement, the retirement of the Bonds and the removal of
the Trustee.  All representations and certifications by the Company as to all
matters affecting the





                                       21
<PAGE>   26
Tax-exempt status of the Bonds shall survive the termination of this Agreement.

                 SECTION 9.8.  BINDING EFFECT.  This Agreement shall inure to
the benefit of and shall be binding upon the Issuer, the Company and their
respective successors and assigns; subject, however, to the limitations
contained in Section 5.2 hereof.





                                       22
<PAGE>   27
                 SECTION 9.9.  THIRD-PARTY BENEFICIARY.  The Trustee is hereby
named a third-party beneficiary to this Agreement to the extent the Company is
required to indemnify, compensate or provides direction or information to the
Trustee pursuant to the terms hereof.

                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed as of the date first above written.


                                                 CLARK COUNTY, NEVADA



                                                 By ____________________________
                                                         Chairman, Board of
                                                        County Commissioners
[SEAL]

Attest


____________________________
        County Clerk

                                                 SOUTHWEST GAS CORPORATION



                                                 By ____________________________
                                                              Treasurer


[SEAL]

Attest:


___________________________
        Secretary





                                       23
<PAGE>   28
                                   EXHIBIT A

                           DESCRIPTION OF THE PROJECT


                           Description of the Project

                 The Project shall consist of those certain additions and
improvements to, and replacements of, the Company's natural gas distribution
and transmission system through which the Company furnishes natural gas to its
customers in Clark County, and certain other plant, property and equipment used
or to be used for the same purposes.  The Project includes, without limitation,
meters, customer service connections, mains, pressure regulators and other
additions and improvements to, and replacements of, the facilities which
comprise the Company's natural gas distribution and transmission system,
including associated land and land rights.





                                      A-1

<PAGE>   1
                                                                   EXHIBIT 10.05

        _______________________________________________________________


                               PROJECT AGREEMENT

                                    Between

                             CITY OF BIG BEAR LAKE

                                      And

                           SOUTHWEST GAS CORPORATION

                          Dated as of December 1, 1993

                                  Relating to

                                  $50,000,000
                             City of Big Bear Lake
                      Industrial Development Revenue Bonds
                      (Southwest Gas Corporation Project)
                                 1993 Series A



       _________________________________________________________________
<PAGE>   2





                               PROJECT AGREEMENT

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                            <C>
          PARTIES . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
          PREAMBLES . . . . . . . . . . . . . . . . . . . . . . . . . .   1

                                      ARTICLE I

                                     DEFINITIONS

          SECTION 1.1.  DEFINITION OF TERMS . . . . . . . . . . . . . .   2
          SECTION 1.2.  NUMBER AND GENDER . . . . . . . . . . . . . . .   2
          SECTION 1.3.  ARTICLES, SECTIONS, ETC.  . . . . . . . . . . .   2

                                      ARTICLE II

                                   REPRESENTATIONS

          SECTION 2.1.  REPRESENTATIONS OF THE CITY . . . . . . . . . .   2
          SECTION 2.2.  REPRESENTATIONS OF THE BORROWER . . . . . . . .   3

                                     ARTICLE III

                    ISSUANCE OF THE BONDS; APPLICATION OF PROCEEDS

          SECTION 3.1.  AGREEMENT TO ISSUE BONDS; APPLICATION OF
                        BOND PROCEEDS . . . . . . . . . . . . . . . . .   4
          SECTION 3.2.  AGREEMENT TO CONSTRUCT PROJECT; AMENDMENT
                        OF DESCRIPTION OF THE PROJECT . . . . . . . . .   4
          SECTION 3.3.  DISBURSEMENTS FROM THE CONSTRUCTION FUND  . . .   5
          SECTION 3.4.  ESTABLISHMENT OF COMPLETION DATE;
                        OBLIGATION OF BORROWER TO COMPLETE  . . . . . .   6
          SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS . . . . . . . . .   7

                                      ARTICLE IV

                        LOAN TO BORROWER; REPAYMENT PROVISIONS

          SECTION 4.1.  LOAN TO BORROWER  . . . . . . . . . . . . . . .   8
          SECTION 4.2.  REPAYMENT AND PAYMENT OF OTHER
                        AMOUNTS PAYABLE . . . . . . . . . . . . . . . .   8
          SECTION 4.3.  UNCONDITIONAL OBLIGATION  . . . . . . . . . . .  10
          SECTION 4.4.  ASSIGNMENT OF CITY'S RIGHTS . . . . . . . . . .  11
          SECTION 4.5.  AMOUNTS REMAINING IN FUNDS  . . . . . . . . . .  11
          SECTION 4.6.  CREDIT FACILITY . . . . . . . . . . . . . . . .  12
</TABLE>





                                       i
<PAGE>   3





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                            <C>
                                      ARTICLE V

                           SPECIAL COVENANTS AND AGREEMENTS

          SECTION 5.1.  RIGHT OF ACCESS TO THE PROJECT  . . . . . . . .  12
          SECTION 5.2.  THE BORROWER'S MAINTENANCE OF ITS
                        EXISTENCE; ASSIGNMENTS  . . . . . . . . . . . .  12
          SECTION 5.3.  RECORDS AND FINANCIAL STATEMENTS OF BORROWER;
                        NOTICES TO TRUSTEE  . . . . . . . . . . . . . .  13
          SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES, UTILITY
                        AND OTHER CHARGES; INSURANCE  . . . . . . . . .  14
          SECTION 5.5.  QUALIFICATION IN CALIFORNIA . . . . . . . . . .  15
          SECTION 5.6.  TAX EXEMPT STATUS OF BONDS  . . . . . . . . . .  15
          SECTION 5.7.  NOTICE OF RATE PERIODS  . . . . . . . . . . . .  16
          SECTION 5.8.  REMARKETING OF THE BONDS  . . . . . . . . . . .  16
          SECTION 5.9.  NOTICES TO TRUSTEE AND CITY . . . . . . . . . .  18
          SECTION 5.10. PROJECT COMPLIANCE  . . . . . . . . . . . . . .  18

                                      ARTICLE VI

                            EVENTS OF DEFAULT AND REMEDIES

          SECTION 6.1.  EVENTS OF DEFAULT . . . . . . . . . . . . . . .  18
          SECTION 6.2.  REMEDIES ON DEFAULT . . . . . . . . . . . . . .  19
          SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND EXPENSES .  21
          SECTION 6.4.  NO REMEDY EXCLUSIVE . . . . . . . . . . . . . .  21
          SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE WAIVER  . .  22

                                     ARTICLE VII

                                      PREPAYMENT

          SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT MONEYS  . .  22
          SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS  . . . . . . . .  22
          SECTION 7.3.  MANDATORY PREPAYMENT  . . . . . . . . . . . . .  22
          SECTION 7.4.  AMOUNT OF PREPAYMENT  . . . . . . . . . . . . .  23
          SECTION 7.5.  NOTICE OF PREPAYMENT  . . . . . . . . . . . . .  23

                                     ARTICLE VIII

                   NON-LIABILITY OF CITY; EXPENSES; INDEMNIFICATION

          SECTION 8.1.  NON-LIABILITY OF CITY . . . . . . . . . . . . .  23
          SECTION 8.2.  EXPENSES  . . . . . . . . . . . . . . . . . . .  24
          SECTION 8.3.  INDEMNIFICATION . . . . . . . . . . . . . . . .  24
</TABLE>





                                       ii
<PAGE>   4





<TABLE>
<CAPTION>
                                                                       Page
                                                                       ----
          <S>                                                           <C>
                                      ARTICLE IX

                                    MISCELLANEOUS
          SECTION 9.1.  NOTICES . . . . . . . . . . . . . . . . . . . .  25
          SECTION 9.2.  SEVERABILITY  . . . . . . . . . . . . . . . . .  25
          SECTION 9.3.  EXECUTION OF COUNTERPARTS . . . . . . . . . . .  25
          SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS . . . . .  26
          SECTION 9.5.  GOVERNING LAW . . . . . . . . . . . . . . . . .  26
          SECTION 9.6.  AUTHORIZED BORROWER REPRESENTATIVE  . . . . . .  26
          SECTION 9.7.  TERM OF THE AGREEMENT . . . . . . . . . . . . .  26
          SECTION 9.8.  BINDING EFFECT  . . . . . . . . . . . . . . . .  26
          SECTION 9.9.  THE CREDIT PROVIDER . . . . . . . . . . . . . .  26

          TESTIMONIUM . . . . . . . . . . . . . . . . . . . . . . . . .  28

          SIGNATURES AND SEALS  . . . . . . . . . . . . . . . . . . . .  28

          EXHIBIT A    Description of the Project . . . . . . . . . . . A-1

          EXHIBIT B    Form of Construction Fund Requisition  . . . . . B-1
</TABLE>





                                      iii
<PAGE>   5


                               PROJECT AGREEMENT


                 THIS PROJECT AGREEMENT, dated as of December 1, 1993, by and
between the CITY OF BIG BEAR LAKE, a municipal corporation and charter city
duly organized and existing under the laws and Constitution of the State of
California (the "City"), and SOUTHWEST GAS CORPORATION, a corporation organized
and existing under the laws of the State of California (the "Borrower"),

                             W I T N E S S E T H :

                 WHEREAS, the City is a municipal corporation and charter city,
duly organized and existing under a freeholders' charter pursuant to which the
City has the right and power to make and enforce all laws and regulations in
accordance with and as more particularly provided in Sections 3, 5 and 7 of
Article XI of the Constitution of the State of California and Section 200 of
the Charter of the City (the "Charter"); and

                 WHEREAS, the City Council of the City, acting under and
pursuant to the powers reserved to the City under Sections 3, 5 and 7 of
Article XI of the Constitution and Section 200 of the Charter, has enacted
Ordinance No. 84-106, adopted on May 9, 1984, as amended from time to time (the
"Law"), establishing a program to provide financial assistance for the
acquisition, construction, improvement and installation of facilities for the
local furnishing of gas; and

                 WHEREAS, the Borrower has duly requested that the City provide
the Borrower with financial assistance to acquire, construct, improve and
install certain facilities for the local furnishing of gas as more fully
described in Exhibit A hereto (the "Project"); and

                 WHEREAS, the City after due investigation and deliberation has
adopted its Resolution No. 93-35 authorizing the issuance of City of Big Bear
Lake Industrial Development Revenue Bonds (Southwest Gas Corporation Project)
1993 Series A in an aggregate principal amount not to exceed $50,000,000 (the
"Bonds") to finance the Project; and

                 WHEREAS, the City proposes to assist in financing the Project
upon the terms and conditions set forth herein;

                 NOW, THEREFORE, in consideration of the premises and the
respective representations and covenants herein contained, the parties hereto
agree as follows:
<PAGE>   6


                                   ARTICLE I

                                  DEFINITIONS

                 SECTION 1.1.  DEFINITION OF TERMS.  Unless the context
otherwise requires, the terms used in this Agreement shall have the meanings
specified in Section 1.01 of the Indenture of Trust, of even date herewith
relating to the Bonds (the "Indenture"), by and between the City and Harris
Trust and Savings Bank, as trustee (the "Trustee"), as originally executed or
as it may from time to time be supplemented or amended as provided therein.

                 SECTION 1.2.  NUMBER AND GENDER.  The singular form of any
word used herein, including the terms defined in Section 1.01 of the Indenture,
shall include the plural, and vice versa.  The use herein of a word of any
gender shall include all genders.

                 SECTION 1.3.  ARTICLES, SECTIONS, ETC.  Unless otherwise
specified, references to Articles, Sections and other subdivisions of this
Agreement are to the designated Articles, Sections and other subdivisions of
this Agreement as originally executed.  The words "hereof," "herein,"
"hereunder" and words of similar import refer to this Agreement as a whole.
The headings or titles of the several articles and sections, and the table of
contents appended to copies hereof, shall be solely for convenience of
reference and shall not affect the meaning, construction or effect of the
provisions hereof.


                                   ARTICLE II

                                REPRESENTATIONS

                 SECTION 2.1.  REPRESENTATIONS OF THE CITY.  The City makes the
following representations as the basis for its undertakings herein contained:

                 (a)      The City is a municipal corporation and charter city
in the State of California.  Under the provisions of the Law, the City has the
power to enter into the transactions contemplated by this Agreement and to
carry out its obligations hereunder.  The financing of the Project constitutes
a "project" as that term is defined in the Law.  By proper action, the City has
been duly authorized to execute, deliver and duly perform this Agreement and
the Indenture.

                 (b)      To finance the cost of the Project, the City will
issue the Bonds which will mature, bear interest and be subject to redemption
as set forth in the Indenture.

                 (c)      The Bonds will be issued under and secured by the
Indenture, pursuant to which the City's interest in this Agreement (except
certain rights of the City to give approvals and consents and to receive
payment for expenses and indemnification and certain other payments) will be
pledged to





                                          2
<PAGE>   7


the Trustee as security for payment of the principal of, premium, if any, and
interest on the Bonds.

                 (d)      The City has not pledged and will not pledge its
interest in this Agreement for any purpose other than to secure the Bonds under
the Indenture.

                 (e)      The City is not in default under any of the
provisions of the laws of the State of California or the City's Charter which
default would affect its existence or its powers referred to in subsection (a)
of this Section 2.1.

                 (f)      The City has found and determined and hereby finds
and determines that all requirements of the Law with respect to the issuance of
the Bonds and the execution of this Agreement and the Indenture have been
complied with and that financing the Project by issuing the Bonds and entering
into this Agreement and the Indenture will be in furtherance of the purposes of
the Law.

                 (g)      On June 2, 1993, the City Council of the City adopted
Resolution No. 93-35 authorizing the issuance of the Bonds.

                 SECTION 2.2.  REPRESENTATIONS OF THE BORROWER. The Borrower
makes the following representations as the basis for its undertakings herein
contained:

                 (a)      The Borrower is a corporation duly formed under the
laws of the State of California, is in good standing in the State of California
and has the power to enter into and has duly authorized, by proper corporate
action, the execution and delivery of this Agreement and all other documents
contemplated hereby to be executed by the Borrower.

                 (b)      Neither the execution and delivery of this Agreement,
the consummation of the transactions contemplated hereby, nor the fulfillment
of or compliance with the terms and conditions hereof, conflicts with or
results in a breach of any of the terms, conditions or provisions of the
Borrower's Articles of Incorporation or By-laws or of any corporate actions or
of any agreement or instrument to which the Borrower is now a party or by which
it is bound, or constitutes a default (with due notice or the passage of time
or both) under any of the foregoing, or results in the creation or imposition
of any prohibited lien, charge or encumbrance whatsoever upon any of the
property or assets of the Borrower under the terms of any instrument or
agreement to which the Borrower is now a party or by which it is bound.

                 (c)  The estimated cost of the Project is as set forth in the
Tax Certificate and has been determined in accordance with sound engineering
principles and certain other principles set forth in the Tax Certificate.





                                          3
<PAGE>   8


                 (d)      The Project consists and will consist of those
facilities described in Exhibit A hereto, and the Borrower shall make no
changes to such portion of the Project or to the operation thereof which would
affect the qualification of the Project as a "project" under the Law or impair
the exemption from gross income of the interest on the Bonds for federal income
tax purposes.  In particular, the Borrower shall comply with all requirements
of the Southwest Gas Corporation Engineering and Financial Certificate, dated
the Issue Date (the "Engineering Certificate"), which is hereby incorporated by
reference herein.  The Project consists of facilities for the local furnishing
of gas as described in the Engineering Certificate.  The Borrower intends to
utilize the Project as facilities for the local furnishing of gas throughout
the foreseeable future.

                 (e)      The Borrower has and will have title to the Project
sufficient to carry out the purposes of this Agreement.

                 (f)  The economic useful life of the Project is no less than
the economic useful life set forth in the Engineering Certificate.

                 (g)  All certificates, approvals, permits and authorizations
with respect to the construction of the Project of agencies of applicable local
governmental agencies, the State of California and the federal government have
been obtained or are believed to be readily obtainable; and the Project will be
constructed and operated pursuant to such certificates, approvals, permits and
authorizations.


                                  ARTICLE III

                 ISSUANCE OF THE BONDS; APPLICATION OF PROCEEDS

                 SECTION 3.1.  AGREEMENT TO ISSUE BONDS; APPLICATION OF BOND
PROCEEDS.  To provide funds to finance the cost of the Project, the City agrees
that it will issue under the Indenture, sell and cause to be delivered to the
purchasers thereof, the Bonds, bearing interest as provided and maturing on the
date set forth in the Indenture.  The City will thereupon apply the proceeds
received from the sale of the Bonds as provided in the Indenture.

                 SECTION 3.2.  AGREEMENT TO CONSTRUCT PROJECT; AMENDMENT OF
DESCRIPTION OF THE PROJECT.  The Borrower agrees that it will acquire,
construct and install, or complete the acquisition, construction and
installation of the Project, and will acquire, construct and install all other
facilities and real and personal property deemed necessary for the operation of
the Project, substantially in accordance with the plans and specifications
prepared therefor by the Borrower and approved by the City, including any and
all supplements, amendments and additions or deletions thereto or therefrom, it
being understood that the approval of the City shall not be required for
changes in such





                                          4
<PAGE>   9


plans and specifications which do not alter the purpose and description of the
Project as set forth in Exhibit A hereto.  The Borrower further agrees to
proceed with due diligence to complete the Project within three years from the
date hereof.

                 In the event that the Borrower desires to amend or supplement
the Project, as described in Exhibit A hereto, and the City approves of such
amendment or supplement, the City will enter into, and will instruct the
Trustee in writing to consent to, such amendment or supplement upon receipt of:

                          (i)     a certificate of an Authorized Borrower
         Representative describing in detail the proposed changes and stating
         that they will not have the effect of disqualifying any component of
         the Project as a project that may be financed pursuant to the Law;

                         (ii)     a copy of the proposed form of amended or 
         supplemented Exhibit A hereto; and

                       (iii)      an opinion of Bond Counsel that such proposed
         changes will not affect the exclusion from gross income of interest on
         the Bonds for federal income tax purposes.

                 SECTION 3.3.     DISBURSEMENTS FROM THE CONSTRUCTION FUND.
The Borrower will authorize and direct the Trustee, upon compliance with
Section 3.03 of the Indenture, to disburse the moneys in the Construction Fund
to or on behalf of the Borrower only for the following purposes, subject to the
provisions of Section 5.6 hereof and the Tax Certificate:

                 (a)      Payment to the Borrower of such amounts, if any, as
shall be necessary to reimburse the Borrower in full for all advances and
payments made by it, at any time prior to or after the delivery of the Bonds,
in connection with (i) the preparation of plans and specifications for the
Project (including any preliminary study or planning of the Project or any
aspect thereof) and (ii) the acquisition, construction and installation of the
Project.

                 (b)      Payment of the initial or acceptance fee of the
Trustee, the fees of the Trustee and any tender agent, remarketing agent or
paying agent incurred during the Construction Period, all legal, underwriting,
financial consulting, accounting and rating agency fees and expenses and
printing and engraving costs incurred by the Borrower or any other person in
connection with the authorization, sale and issuance of the Bonds, the
execution of the Indenture and the preparation of all other documents in
connection therewith; and payment of all fees, costs and expenses incurred by
the Borrower or any other person with respect to the preparation of this
Agreement, the Indenture, the Bonds, the Credit Facility and all other
documents in connection therewith.





                                          5
<PAGE>   10


                 (c)      Payment for labor, services, materials and supplies
used by or furnished to the Borrower to improve the site and to acquire and
construct the Project, as provided in the plans, specifications and work orders
therefor; payment of the costs of acquiring, constructing, and installing
utility services or other related facilities; payment of the costs of acquiring
all real and personal property deemed necessary to construct the Project; and
payment of the miscellaneous expenses incidental to any of the foregoing items.

                 (d)      Payment of the fees, if any, of architects,
engineers, legal counsel and supervisors expended in connection with the
acquisition and construction of the Project.

                 (e)      Payment of the taxes, assessments and other charges,
if any, that are incurred during the Construction Period with respect to the
Project, or reimbursement thereof, if paid by the Borrower.

                 (f)      Payment of expenses incurred in seeking to enforce
any remedy against any contractor or subcontractor in  respect of any default
under a contract relating to the acquisition, construction or installation of
the Project.

                 (g)      Payment of interest accruing on the Bonds during the
Construction Period (including reimbursement of amounts drawn under any Credit
Facility to pay such interest) and fees of the Credit Provider and its counsel
attributable to the cost of providing the Credit Facility during the
Construction Period.

                 (h)      Payment of any amount payable to the Rebate Fund,
pursuant to the Tax Certificate, Section 5.6 hereof and Section 6.06 of the
Indenture.

                 All moneys remaining in the Construction Fund after the
Completion Date and after payment or provision for payment of all other items
provided for in the preceding subsections (a) to (g), inclusive, of this
Section, shall be used in accordance with Section 3.03 of the Indenture.

                 Each of the payments referred to in this Section shall be made
upon receipt by the Trustee of a written requisition in the substantially the
form attached to this Agreement as Exhibit B, signed by an Authorized Borrower
Representative.

                 SECTION 3.4.     ESTABLISHMENT OF COMPLETION DATE; OBLIGATION
OF BORROWER TO COMPLETE.  Upon completion of the Project, the Borrower shall
evidence the Completion Date by providing to the Trustee and the City a
certificate of an Authorized Borrower Representative stating the Cost of the
Project and further stating that (i) construction of the Project has been
completed substantially in accordance with the plans, specifications and work
orders therefor, and all labor, services, materials and supplies used in
construction have been paid for, and (ii) all other facilities necessary in
connection with the





                                          6
<PAGE>   11


Project have been acquired, constructed and installed in accordance with the
plans and specifications and work orders therefor and all costs and expenses
incurred in connection therewith have been paid.  Notwithstanding the
foregoing, such certificate may state that it is given without prejudice to any
rights of the Borrower against third parties for the payment of any amount not
then due and payable which exist at the date of such certificate or which may
subsequently exist.

                 At the time such certificate is delivered to the Trustee, any
moneys remaining in the Construction Fund, including any earnings resulting
from the investment of such moneys, shall be transferred to the Surplus Account
and used as provided in Section 3.03 of the Indenture.  In the event that the
amount on deposit in the Surplus Account after such transfer is insufficient to
redeem Bonds in a principal amount divisible by Authorized Denominations, the
Borrower shall pay to the Trustee for deposit in the Surplus Account the
minimum amount which, together with amounts transferred from the Construction
Fund to such account pursuant to Section 3.03 of the Indenture, shall be
sufficient to redeem Bonds in the next largest principal amount divisible by
Authorized Denominations.

                 In the event the moneys in the Construction Fund available for
payment of the Cost of the Project should be insufficient to pay the costs
thereof in full, the Borrower agrees to pay directly, or to deposit in the
Construction Fund moneys sufficient to pay, any costs of completing the Project
in excess of the moneys available for such purpose in the Construction Fund.
The City makes no express or implied warranty that the moneys deposited in the
Construction Fund and available for payment of the Cost of the Project, under
the provisions of this Agreement, will be sufficient to pay all the amounts
which may be incurred for such Cost of the Project.  The Borrower agrees that
if, after exhaustion of the moneys in the Construction Fund, the Borrower
should pay any portion of the Cost of the Project pursuant to the provisions of
this Section, it shall not be entitled to any reimbursement therefor from the
City, from the Trustee or from the holders of any of the Bonds, nor shall it be
entitled to any diminution of the amounts payable under Section 4.2 hereof.

                 SECTION 3.5.  INVESTMENT OF MONEYS IN FUNDS.  Any moneys in
any fund held by the Trustee shall, at the written request of an Authorized
Borrower Representative, be invested or reinvested by the Trustee as provided
in the Indenture, subject to Section 5.6 hereof.  Such investments shall be
held by the Trustee and shall be deemed at all times a part of the fund from
which such investments were made, and the interest accruing thereon and any
profit or loss realized therefrom shall, except as otherwise provided in the
Indenture, be credited or charged to such fund.





                                          7
<PAGE>   12


                                   ARTICLE IV

                     LOAN TO BORROWER; REPAYMENT PROVISIONS

                 SECTION 4.1.  LOAN TO BORROWER.  The City covenants and
agrees, upon the terms and conditions in this Agreement, to make a loan to the
Borrower for the purpose of financing the Cost of the Project.  Pursuant to
said covenant and agreement, the City will issue the Bonds upon the terms and
conditions contained in this Agreement and the Indenture and will cause the
Bond proceeds to be applied as provided in Article III thereof.  Except as
provided in Section 3.02 of the Indenture, such proceeds shall be disbursed to
or on behalf of the Borrower as provided in Section 3.3 hereof.  The City and
the Borrower agree that the application of the proceeds of sale of the Bonds to
finance a portion of the Costs of the Project as provided in this Agreement and
the Indenture will be deemed to be and treated for all purposes as a loan to
the Borrower of an amount equal to the principal amount of the Bonds.

                 SECTION 4.2.  REPAYMENT AND PAYMENT OF OTHER AMOUNTS PAYABLE.
To evidence, secure and provide for the repayment of the loan made hereunder,
the Borrower shall concurrently with the execution hereof deliver (or cause to
be delivered) to the Trustee the Letter of Credit as the initial Credit
Facility.  In addition, the Borrower agrees to make the payments required by
subsection (a) through (d) of this Section as Repayment Installments on such
loan.

                 (a)      The Borrower hereby authorizes and directs the
Trustee to draw or demand payment of moneys under the Credit Facility (if any
shall then be in effect) in accordance with the provisions of the Indenture and
such Credit Facility at the times and in the amounts necessary to pay the
principal of, premium, if any (if covered by such Credit Facility), and
interest on the Bonds if and when due.  Solely to the extent that the proceeds
of such drawing or payment under such Credit Facility, if any, are insufficient
to make such payments when due, the Borrower covenants and agrees to pay to the
Trustee as a Repayment Installment on the loan to the Borrower pursuant to
Section 4.1 hereof, on each date provided in or pursuant to the Indenture for
the payment of principal (whether at maturity or upon redemption or
acceleration) of, premium, if any, and/or interest on the Bonds, until the
principal of, premium, if any, and interest on the Bonds shall have been fully
paid or provision for the payment thereof shall have been made in accordance
with the Indenture, in immediately available funds, for deposit in the Bond
Fund, a sum equal to the amount then payable as principal (whether at maturity
or upon redemption or acceleration), premium, if any, and interest upon the
Bonds as provided in the Indenture.

                 Each payment pursuant to any Credit Facility, together with
any other payments required to be made by the Borrower pursuant to this Section
4.2(a), shall at all times be sufficient to pay the total amount of interest
and principal (whether at





                                          8
<PAGE>   13


maturity or upon redemption or acceleration) and premium, if any, then payable
on the Bonds; provided that any amount held by the Trustee in the Bond Fund on
any due date for a Repayment Installment hereunder shall be credited against
the installment due on such date to the extent available for such purpose; and
provided further that, subject to the provisions of this paragraph, if at any
time the amounts held by the Trustee in the Bond Fund are sufficient to pay all
of the principal of and interest and premium, if any, on the Bonds as such
payments become due, the Borrower shall be relieved of any obligation to make
any further payments under the provisions of this Section.  Notwithstanding the
foregoing, if on any date the amount held by the Trustee in the Bond Fund is
insufficient to make any required payments of principal of (whether at maturity
or upon redemption or acceleration) and interest and premium, if any, on the
Bonds as such payments become due, the Borrower shall forthwith pay such
deficiency as a Repayment Installment hereunder.

                 (b)      The Borrower also agrees to pay to the Trustee until
the principal of, premium, if any, and interest on the Bonds shall have been
fully paid or provision for the payment thereof shall have been made as
required by the Indenture, (i) the annual fee of the Trustee for its ordinary
services rendered as trustee, and its ordinary expenses (including reasonable
fees and expenses of counsel) incurred under the Indenture, as and when the
same become due, (ii) the reasonable fees, charges and expenses of the Trustee,
the Registrar and the reasonable fees of any paying agent on the Bonds as
provided in the Indenture, as and when the same become due (including the
reasonable fees and expenses of counsel), including fees, charges and expenses
relating to the interpretation, enforcement or amendment of this Agreement,
(iii) the reasonable fees, charges and expenses of the Trustee for the
necessary extraordinary services rendered by it and extraordinary expenses
incurred by it under the Indenture, as and when the same become due (including
the reasonable fees and expenses of its counsel), and (iv) any amounts required
to be deposited in the Rebate Fund to comply with the provisions of Section 5.6
hereof.  The Borrower shall also pay the cost of printing any Bonds required to
be furnished by the City.

                 (c)      The Borrower also agrees to pay, within 60 days after
receipt of request for payment thereof, all expenses required to be paid by the
Borrower under the terms of the Bond Purchase Agreement executed by it in
connection with the sale of the Bonds, and all expenses of the City related to
the financing of the Project which are not otherwise required to be paid by the
Borrower under the terms of this Agreement; provided that the City shall have
obtained the prior written approval of the Authorized Borrower Representative
for any expenditures other than those provided for herein or in said Bond
Purchase Agreement.





                                          9
<PAGE>   14


                 The Borrower also agrees to pay to the City on or before the
Issue Date an origination fee for the Bonds in the amount of $125,000.

                 (d)      The Borrower hereby authorizes and directs the
Trustee to draw or demand payment of moneys under the Credit Facility (if any
shall then be in effect) in accordance with the provisions of the Indenture and
such Credit Facility at the times and in the amounts necessary to pay the
purchase price of all Bonds tendered for purchase in accordance with Sections
2.01(d) and 2.01(e) of the Indenture, to the extent proceeds of the remarketing
of such Bonds are not then available for such payment.  Solely to the extent
that the proceeds of any such drawing or payment under such Credit Facility, if
any, together with the proceeds of the remarketing of such tendered Bonds, are
insufficient to pay the purchase price of such Bonds, the Borrower hereby
agrees to pay in immediately available funds, for deposit into the Bond
Purchase Fund (as defined in the Tender Agreement) maintained by the Tender
Agent, all amounts necessary to purchase such tendered Bonds in accordance with
Sections 2.01(d) and 2.01(e) of the Indenture.

                 (e)  In the event the Borrower should fail to make any of the
payments required by subsections (a) through (d) of this Section, such payments
shall continue as obligations of the Borrower until such amounts shall have
been fully paid.  The Borrower agrees to pay such amounts, together with
interest thereon until paid, to the extent permitted by law, at the rate of one
percent (1%) per annum over the rate borne by any Bonds in respect of which
such payments are required to be made pursuant to said subsection (a), and one
percent (1%) per annum over the average rate then borne by the Bonds as to all
other payments.  Interest on overdue payments required under subsection (a) or
(d) above shall be paid to Bondholders as provided in the Indenture.

                 (f)  Upon written request of the Trustee, the Borrower shall
pay any Repayment Installment directly to the Paying Agent.

                 SECTION 4.3.  UNCONDITIONAL OBLIGATION.  The obligations of
the Borrower to make the payments required by Section 4.2 hereof and to perform
and observe the other agreements on its part contained herein shall be absolute
and unconditional, irrespective of any defense or any rights of set-off,
recoupment or counterclaim it might otherwise have against the City, and during
the term of this Agreement, the Borrower shall pay absolutely net the payments
to be made on account of the loan as prescribed in Section 4.2 and all other
payments required hereunder, free of any deductions and without abatement,
diminution or set-off.  Until such time as the principal of, premium, if any,
and interest on the Bonds shall have been fully paid, or provision for the
payment thereof shall have been made as required by the Indenture, the Borrower
(i) will not suspend or discontinue any payments provided for in Section 4.2
hereof; (ii) will perform and observe all of its other covenants contained in
this Agreement and any Credit





                                          10
<PAGE>   15


Agreement; and (iii) will not terminate this Agreement for any cause,
including, without limitation, failure to complete the Project, the occurrence
of any act or circumstances that may constitute failure of consideration,
destruction of or damage to the Project, commercial frustration of purpose, any
change in the tax or other laws of the United States of America or of the State
of California or any political subdivision of either of these, or any failure
of the City or the Trustee to perform and observe any covenant, whether express
or implied, or any duty, liability or obligation arising out of or connected
with this Agreement or the Indenture, except to the extent permitted by this
Agreement.

                 SECTION 4.4.  ASSIGNMENT OF CITY'S RIGHTS.  As security for
the payment of the Bonds, the City will assign to the Trustee the City's
rights, but not its obligations, under this Agreement, including the right to
receive payments hereunder (except (i) the rights of the City to receive
notices under this Agreement, (ii) the right of the City to receive certain
payments, if any, with respect to fees, expenses and indemnification and
certain other purposes under Sections 4.2(c), 4.2(e), 6.3, 8.2 and 8.3 hereof,
and (iii) the right of the City to give approvals or consents pursuant to this
Agreement) and the City hereby directs the Borrower to make the payments
required hereunder (except such payments for fees, expenses and
indemnification) directly to the Trustee.  The Borrower hereby assents to such
assignment and agrees to make payments directly to the Trustee without defense
or set-off by reason of any dispute between the Borrower and the City or the
Trustee.

                 The City hereby acknowledges that the Borrower will be
obligated to reimburse any Credit Provider for amounts provided under any
Credit Facility to purchase Bonds which are tendered for purchase and not
remarketed pursuant to the Remarketing Agreement, and acknowledges that any and
all proceeds of any subsequent remarketing of any such Bonds so purchased will
be paid to the Credit Provider in order to discharge such reimbursement
obligation (or any loan by the Credit Provider to finance such reimbursement
obligation) of the Borrower to the Credit Provider.

                 SECTION 4.5.  AMOUNTS REMAINING IN FUNDS.  It is agreed by the
parties hereto that after payment in full of (i) the Bonds, or after provision
for such payment shall have been made as provided in the Indenture, (ii) the
fees and expenses of the City in accordance with this Agreement, (iii) the
fees, charges and expenses of the Trustee, the Registrar and paying agents in
accordance with the Indenture and this Agreement and (iv) all other amounts
required to be paid under this Agreement and the Indenture, any amounts
remaining in any fund held by the Trustee under the Indenture shall be applied
as provided in Section 5.06 of the Indenture.




 
                                          11
<PAGE>   16


                 SECTION 4.6.     CREDIT FACILITY.  The Borrower may provide
and subsequently terminate a Credit Facility with respect to the Bonds in
accordance with the provisions of Section 5.07 of the Indenture; provided,
however, that the Borrower shall not terminate any Credit Facility with respect
to Bonds during a Term Rate Period or a Variable Term Rate Period.  Not less
than fifteen days prior to any termination of a Credit Facility, any renewal or
extension of a Credit Facility or any delivery of any substitute Credit
Facility, the Borrower shall mail written notice of such termination, renewal,
extension or substitution, as the case may be, to the Rating Agencies.  The
Borrower covenants and agrees that it will not terminate, amend or consent to
any amendment of any Credit Facility, Credit Agreement or other document
relating to a Credit Facility unless the City and the Trustee shall have
received an opinion of Bond Counsel to the effect that such termination,
amendment or consent will not adversely affect the Tax-exempt status of
interest on the Bonds.


                                   ARTICLE V

                        SPECIAL COVENANTS AND AGREEMENTS

                 SECTION 5.1.  RIGHT OF ACCESS TO THE PROJECT.  The Borrower
agrees that during the term of this Agreement the City, the Trustee and the
duly authorized agents of either of them shall have the right at all reasonable
times during normal business hours to enter upon the site of the Project
described in Exhibit A hereto to examine and inspect such Project; provided,
however, that this right is subject to federal and State of California laws and
regulations applicable to such site; and provided, further, that such right of
access to the site of the Project shall not be construed to require the
excavation of any subterranean portions of the Project or any other
extraordinary measures which might disturb the Project's normal operation.  The
rights of access hereby reserved to the City and the Trustee may be exercised
only after such agent shall have executed release of liability (which release
shall not limit any of the Borrower's obligations hereunder) and secrecy
agreements if requested by the Borrower in the form then currently used by the
Borrower, and nothing contained in this Section or in any other provision of
this Agreement shall be construed to entitle the City or the Trustee to any
information or inspection involving the confidential know-how of the Borrower.

                 SECTION 5.2.  THE BORROWER'S MAINTENANCE OF ITS EXISTENCE;
ASSIGNMENTS.  (a)  The Borrower agrees that during the term of this Agreement
it will maintain its corporate existence in good standing and will not dissolve
or otherwise dispose of all or substantially all of its assets and will not
consolidate with or merge into another corporation or permit one or more other
corporations to consolidate or merge into it; provided, that the Borrower may,
without violating the covenants contained in this Section, consolidate with or
merge into another corporation, or permit one or more other corporations to





                                          12
<PAGE>   17


consolidate with or merge into it, or sell or otherwise transfer to another
corporation all or substantially all of its assets and thereafter dissolve,
provided that (1) either (A) the Borrower is the surviving corporation or (B)
the surviving, resulting or transferee corporation, as the case may be, (i)
assumes and agrees in writing to pay and perform all of the obligations of the
Borrower hereunder, and (ii) qualifies to do business in the State of
California; and (2) the Borrower shall deliver to the Trustee an opinion of
Bond Counsel to the effect that such consolidation, merger or transfer and
dissolution does not in and of itself adversely affect the exclusion from gross
income for federal income tax purposes of interest on the Bonds.

                 (b)      The rights and obligations of the Borrower under this
Agreement may be assigned by the Borrower, with the written consent of the
City, in whole or in part subject, however, to each of the following
conditions:

                          (i)     No assignment (other than pursuant to a
merger, consolidation or combination described in Section 5.2(a)) shall relieve
the Borrower from primary liability for any of its obligations hereunder, and
in the event of any assignment not pursuant to Section 5.2(a), the Borrower
shall continue to remain primarily liable for the payments specified in Section
4.2 hereof and for performance and observance of the other agreements on its
part herein provided to be performed and observed by it.

                        (ii)      Any assignment from the Borrower shall retain
for the Borrower such rights and interests as will permit it to perform its
obligations under this Agreement, and any assignee from the Borrower shall
assume the obligations of the Borrower hereunder to the extent of the interest
assigned.

                       (iii)      The Borrower shall, within thirty days after
delivery of such assignment, furnish or cause to be furnished to the City and
the Trustee a true and complete copy of each such assignment together with an
instrument of assumption.

                        (iv)      The Borrower shall cause to be delivered to
the City and the Trustee an opinion of Bond Counsel that such assignment will
not, in and of itself, result in the interest on the Bonds being determined to
be includable in the gross income for federal income tax purposes of the owners
thereof.

                 SECTION 5.3.  RECORDS AND FINANCIAL STATEMENTS OF BORROWER;
NOTICES TO TRUSTEE.  The Borrower agrees (a) to keep and maintain full and
accurate accounts and records of its operations in accordance with generally
accepted accounting principles, and (b) to permit the Trustee for itself or on
behalf of the holders of the Bonds and its designated officers, employees,
agents and representatives to have access to such accounts and records and to
make examinations thereof at all reasonable times.  The Borrower hereby further
agrees to provide the Trustee with the following:





                                          13
<PAGE>   18


                          (a)     On or before the fifth (5th) Business Day
         following each Interest Payment Date while any of the Bonds are
         Outstanding, a certificate of an Authorized Borrower Representative
         (which complies with Section 1.04 of the Indenture) that all payments
         required under this Agreement have been made;

                          (b)     Within one hundred twenty (120) days after
         the end of each fiscal year of the Borrower, (i) a certificate of
         Authorized Borrower Representative (which complies with Section 1.04
         of the Indenture) to the effect that all payments have been made under
         this Agreement and that, to the best of such officer's knowledge,
         there exists no Event of Default or event which, with the passage of
         time or the giving of notice, or both, would become an Event of
         Default, or, if any default or Event of Default exists, a description
         thereof and (ii) the audited annual report of the Borrower for such
         fiscal year; and

                          (c)     Upon knowledge of an Event of Default under
         this Agreement or the Indenture, notice of such Event of Default, such
         notice to include a description of the nature of such event and what
         steps are being taken to remedy such Event of Default.

                 SECTION 5.4.  MAINTENANCE AND REPAIR; TAXES, UTILITY AND OTHER
CHARGES; INSURANCE.  The Borrower agrees that as long as it owns the Project it
will (i) maintain, or cause to be maintained, the Project in as reasonably safe
condition as its operations shall permit and (ii) maintain, or cause to be
maintained, the Project in good repair and in good operating condition,
ordinary wear and tear excepted, making from time to time all necessary repairs
thereto and renewals and replacements thereof.

                 The Borrower agrees to pay or cause to be paid during the term
of this Agreement all taxes, governmental charges of any kind lawfully assessed
or levied upon the Project or any part thereof, all utility and other charges
incurred in the operation, maintenance, use, occupancy and upkeep of the
Project and all assessments and charges lawfully made by any governmental body
for public improvements that may be secured by a lien on the Project, provided
that with respect to special assessments or other governmental charges that may
lawfully be paid in installments over a period of years, the Borrower shall be
obligated to pay only such installments as are required to be paid during the
term of this Agreement.  The Borrower may, at the Borrower's expense and in the
Borrower's name, in good faith, contest any such taxes, assessments and other
charges and, in the event of any such contest, may permit the taxes,
assessments or other charges so contested to remain unpaid during that period
of such contest and any appeal therefrom unless by such nonpayment the Project
or any part thereof will be subject to loss or forfeiture.





                                          14
<PAGE>   19


                 The Borrower agrees that it will keep, or cause to be kept,
(i) the Project insured against such risks and in such amounts as are
consistent with its insurance practices for similar types of facilities (which
may include self-insurance), and (ii) insurance against all direct or
contingent loss or liability for personal injury, death or property damage
occasioned by the operation of the Project, which insurance may be a part of
the policy or policies of insurance customarily maintained by the Borrower in
connection with its general property and liability insurance upon all of the
plants and properties operated by it (including such deductibles as may be
provided in said policies).

                 SECTION 5.5.  QUALIFICATION IN CALIFORNIA.  The Borrower
agrees that throughout the term of this Agreement it, or any successor or
assignee as permitted by Section 5.2, will be qualified to do business in the
State of California.

                 SECTION 5.6.  TAX EXEMPT STATUS OF BONDS.  (A) It is the
intention of the parties hereto that interest on the Bonds shall be and remain
excluded from gross income for federal income tax purposes.  To that end the
covenants and agreements of the City and the Borrower in this Section and in
the Tax Certificate are for the benefit of the Trustee and each and every
person who at any time will be a holder of the Bonds.

                 (B)      The City covenants and agrees that it has not taken
and will not take any action which results in interest to be paid on the Bonds
being included in gross income of the holders of the Bonds for federal income
tax purposes, and the Borrower covenants and agrees that it has not taken or
permitted to be taken and will not take or permit to be taken any action which
will cause the interest on the Bonds to become includable in gross income for
federal income tax purposes; provided that neither the Borrower nor the City
shall have violated these covenants if interest on any of the Bonds becomes
taxable to a person solely because such person is a "substantial user" of the
Project or the Clark County Project or a "related person" within the meaning of
Section 147(a) of the Code; and provided further that none of the covenants and
agreements herein contained shall require either the Borrower or the City to
enter an appearance or intervene in any administrative, legislative or judicial
proceeding in connection with any changes in applicable laws, rules or
regulations or in connection with any decisions of any court or administrative
agency or other governmental body affecting the taxation of interest on the
Bonds.  The Borrower acknowledges having read Section 6.06 of the Indenture and
agrees to perform all duties imposed on it by such Section, by this Section and
by the Tax Certificate.  Insofar as Section 6.06 of the Indenture and the Tax
Certificate impose duties and responsibilities on the City or the Borrower,
they are specifically incorporated herein by reference.

                 (C)      Notwithstanding any provision of this Section 5.6 or
Section 6.06 of the Indenture, if the Borrower shall provide





                                          15
<PAGE>   20


to the City and the Trustee an opinion of Bond Counsel to the effect that any
specified action required under this Section 5.6 and Section 6.06 of the
Indenture is no longer required or that some further or different action is
required to maintain the exclusion from federal income tax of interest on the
Bonds, the Borrower, the Trustee and the City may conclusively rely on such
opinion in complying with the requirements of this Section, and the covenants
hereunder shall automatically be deemed to be modified to that extent.

                 SECTION 5.7.     NOTICE OF RATE PERIODS.  The Borrower shall
designate and give timely written notice to the Trustee as required by the
Indenture prior to any change in Rate Periods for the Bonds.  In addition, if
the Borrower shall elect to change Rate Periods in accordance with the
Indenture and the Bonds under circumstances requiring the delivery of an
opinion of Bond Counsel, the Borrower shall deliver such opinion to the Trustee
concurrently with the giving of notice with respect thereto, and no such change
shall be effective without an opinion of Bond Counsel to the effect that such
change is authorized or permitted under the Indenture and the Law and will not
adversely affect the Tax-Exempt status of the interest on the Bonds.

                 SECTION 5.8.     REMARKETING OF THE BONDS.

                 (a)      The Borrower agrees to perform all obligations and
duties required of it by the Indenture with respect to the remarketing of the
Bonds, and to appoint as set forth below a Remarketing Agent and a Tender Agent
meeting the qualifications and otherwise meeting the requirements set forth in
this Section 5.8.

                 (b)      Tender Agent.

                 (i)      Appointment and Duties:  In order to carry out the
duties and obligations of the Tender Agent contained in the Indenture, the
Borrower shall appoint a Tender Agent or Tender Agents in order to carry out
such duties and obligations.  Each Tender Agent shall designate to the Trustee
its principal office and signify its acceptance of the duties and obligations
imposed upon it under the Indenture by entering into a Tender Agreement with
the Borrower and such other parties as shall be appropriate, which may be
combined with a Remarketing Agreement into a single document, delivered to the
City, the Trustee, the Borrower and the Remarketing Agent, under which the
Tender Agent shall agree, particularly (but without limitation):  (A) to
perform the duties and comply with the requirements imposed upon it by the
Tender Agreement, the Indenture and this Agreement; and (B) to keep such books
and records with respect to its activities as Tender Agent as shall be
consistent with prudent industry practice and to make such books and records
available for inspection by each of the City, the Trustee and the Borrower at
all reasonable times.

                (ii)      Qualifications:  Each Tender Agent shall be a banking
corporation or banking association organized and doing





                                          16
<PAGE>   21


business under the laws of the United States or of a state thereof, authorized
under such laws to exercise corporate trust powers, having a combined capital
and surplus of at least Fifty Million Dollars ($50,000,000), subject to
supervision or examination by federal or state authority and whose senior,
unsecured debt obligations, or whose parent or holding company's senior,
unsecured debt obligations, are continuously rated at least Baa3 or Prime3 by
Moody's Investors Service (so long as such Rating Agency maintains a rating on
the Bonds and on such Person, parent or holding company, as the case may be).
If such banking corporation or banking association publishes a report of
condition at least annually, pursuant to law or to the requirements of any
supervising or examining authority above referred to, then for the purposes of
this Section the combined capital and surplus of such banking corporation or
banking association shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published.

                 (c)      Remarketing Agent.  In order to carry out the duties
and obligations contained in the Indenture, the Borrower, by an instrument in
writing (which may be the Remarketing Agreement) signed by an Authorized
Borrower Representative, shall select the Remarketing Agent for the Bonds
subject to the conditions set forth below.  The Remarketing Agent shall
designate to the Trustee its principal office and signify its acceptance of the
duties and obligations imposed upon it under the Indenture by a written
instrument of acceptance (which may be the execution of a Remarketing
Agreement) delivered to the City, the Trustee and the Borrower under which the
Remarketing Agent shall agree, particularly (but without limitation):  (i) to
perform the duties and comply with the requirements imposed upon it by the
Remarketing Agreement, the Indenture and this Agreement; and (ii) to keep such
books and records with respect to its activities as Remarketing Agent as shall
be consistent with prudent industry practice and to make such books and records
available for inspection by each of the City, the Trustee and the Borrower at
all reasonable times.  No Person shall be eligible to serve as the Remarketing
Agent with respect to the Bonds unless either the senior, unsecured debt
obligations of such Person, or the senior, unsecured debt obligations of such
Person's parent or holding company, are continuously rated at least Baa3 or
Prime3 by Moody's Investors Service (so long as such Rating Agency maintains a
rating on the Bonds and on such Person, parent or holding company, as the case
may be).  The principal office of the Remarketing Agent shall be located in the
same city as the principal office of the Tender Agent.

                 (d)      Remarketing Agreement.  In order to provide for the
remarketing of the Bonds, the Borrower shall enter into a Remarketing Agreement
with the Remarketing Agent and such other parties as shall be appropriate,
which may be combined with a Tender Agreement into a single document.  Each
Remarketing Agreement shall include the following:  (i) a requirement that such
Remarketing Agreement shall not be terminated by the





                                          17
<PAGE>   22


Borrower without cause for a period of at least six months after the effective
date thereof; and (ii) a statement to the effect that the Remarketing Agent is
not acting in an agency capacity with respect to the Borrower in establishing
interest rates and Rate Periods as described in Section 2.01 of the Indenture,
but is acting as agent of the City pursuant to the Law with respect to such
functions.

                 (e)  Notices to Remarketing Agents.  The Borrower agrees to
provide to any co-remarketing agents specified in the applicable Remarketing
Agreement with notice of any proposed adjustment of the Rate Period for the
Bonds to a Term Rate Period pursuant to Section 2.01(c)(iv)(B) of the Indenture
and any other notice specified in such Remarketing Agreement, all at the times
and in the manner specified therein.

                 SECTION 5.9.     NOTICES TO TRUSTEE AND CITY.  The Borrower
hereby agrees to provide each of the Trustee and the City with notice of any
event of which it has knowledge which, with the passage of time or the giving
of notice, would be an Event of Default, such notice to include a description
of the nature of such event and what steps are being taken to remedy such Event
of Default.  The Borrower further agrees and covenants to notify the City
promptly upon receiving actual notice of any non-performance by the Trustee of
its duties and obligations under the Indenture or this Agreement.

                 SECTION 5.10.  PROJECT COMPLIANCE.  The Borrower hereby
covenants and agrees to comply with (or cause to be complied with) all legal
requirements relating to the operation, maintenance and repair of the Project.
In furtherance of such covenant, the Borrower shall (a) obtain any rezonings or
variances, building, development or other permits and approvals, and licenses
or other entitlements for use which it deems necessary for the operation,
maintenance and repair of the Project, without regard to any exemption for
public projects, and (b) secure the issuance of any necessary certificates of
need, convenience and necessity or other necessary certificates or franchises.
Upon written request by the City or the Trustee, the Borrower shall provide
evidence of such compliance to the City and the Trustee.


                                   ARTICLE VI

                         EVENTS OF DEFAULT AND REMEDIES

                 SECTION 6.1.  EVENTS OF DEFAULT.  Any one of the following
which occurs and continues shall constitute an Event of Default pursuant to
this Agreement:

                          (a)     failure by the Borrower to pay any amounts
         required to be paid under Section 4.2(a) or 4.2(d) hereof when due; or





                                          18
<PAGE>   23


                          (b)     failure of the Borrower to observe and
         perform any covenant, condition or agreement on its part required to
         be observed or performed by this Agreement, other than making the
         payments referred to in (a) above, which continues for a period of 60
         days after written notice, which notice shall specify such failure and
         request that it be remedied, given to the Borrower by the City or the
         Trustee, unless the City and the Trustee shall agree in writing to an
         extension of such time; provided, however, that if the failure stated
         in the notice cannot be corrected within such period, the City and the
         Trustee will not unreasonably withhold their consent to an extension
         of such time if corrective action is instituted within such period and
         diligently pursued until the default is corrected; or

                          (c)     an Act of Bankruptcy of the Borrower; or

                          (d)  any default under any Credit Agreement if the
         Credit Provider notifies the Trustee in writing that such default
         shall be treated as an Event of Default hereunder.

The provisions of subsection (b) of this Section are subject to the limitation
that the Borrower shall not be deemed in default if and so long as the Borrower
is unable to carry out its agreements hereunder by reason of strikes, lockouts
or other industrial disturbances; acts of public enemies; orders of any kind of
the government of the United States or of the State of California or any of
their departments, agencies, or officials, or any civil or military authority;
insurrections, riots, epidemics, landslides; lightning; earthquake; fire;
hurricanes; storms; floods; washouts; droughts; arrests; restraint of
government and people; civil disturbances; explosions; breakage or accident to
machinery, transmission pipes or canals; partial or entire failure of
utilities; or any other cause or event not reasonably within the control of the
Borrower; it being agreed that the settlement of strikes, lockouts and other
industrial disturbances shall be entirely within the discretion of the
Borrower, and the Borrower shall not be required to make settlement of strikes,
lockouts and other industrial disturbances by acceding to the demands of the
opposing party or parties when such course is, in the judgment of the Borrower,
unfavorable to the Borrower.  This limitation shall not apply to any default
under subsections (a), (c) or (d) of this Section.

                 SECTION 6.2.  REMEDIES ON DEFAULT.  Whenever any Event of
Default shall have occurred and shall continue, the following remedies may be
pursued:

                          (a)     The Trustee may, and upon the written request
         of any Credit Provider (which request may be contained in the notice
         referred to in paragraph (d) of Section 6.1 hereof) or the holders of
         not less than 25% in aggregate principal amount of Bonds then
         outstanding, shall, by notice in writing delivered to the Borrower
         with copies of such notice being sent to the City and each Credit
         Provider,





                                          19
<PAGE>   24


         declare the unpaid balance of the loan payable under Section 4.2(a) of
         this Agreement and the interest accrued thereon to be immediately due
         and payable and such principal and interest shall thereupon become and
         be immediately due and payable.  Upon any such acceleration, the Bonds
         shall be subject to mandatory redemption as provided in Section
         4.01(b)(2) of the Indenture.  After any such declaration of
         acceleration, the Trustee shall immediately take such actions as
         necessary to realize moneys under any Credit Facility.

                          (b)     The Trustee may have access to and may
         inspect, examine and make copies of the books and records and any and
         all accounts, data and federal income tax and other tax returns of the
         Borrower.

                          (c)     The City or the Trustee may take whatever
         action at law or in equity as may be necessary or desirable to collect
         the payments and other amounts then due and thereafter to become due
         or to enforce performance and observance of any obligation, agreement
         or covenant of the Borrower under this Agreement.

                 The provisions of clause (a) of the preceding paragraph,
however, are subject to the condition that if, at any time after the loan shall
have been so declared due and payable, and before any judgment or decree for
the payment of the moneys due shall have been obtained or entered as
hereinafter provided, there shall have been deposited with the Trustee a sum
sufficient (together with any amounts held in the Bond Fund) to pay all the
principal of the Bonds matured prior to such declaration and all matured
installments of interest (if any) upon all the Bonds, with interest on such
overdue installments of principal as provided herein, and the reasonable
expenses of the Trustee, and the amount available to be drawn under the Credit
Facility shall hve been fully reinstated, and any and all other defaults known
to the Trustee (other than in the payment of principal of and interest on the
Bonds due and payable solely by reason of such declaration) shall have been
made good or cured to the satisfaction of the Trustee or provision deemed by
the Trustee to be adequate shall have been made therefor, then, and in every
such case, the holders of at least a majority in aggregate principal amount of
the Bonds then outstanding, by written notice to the City and to the Trustee,
may, on behalf of the holders of all the Bonds, rescind and annul such
declaration and its consequences and waive such default; provided that no such
rescission and annulment shall extend to or shall affect any subsequent
default, or shall impair or exhaust any right or power consequent thereon; and
provided further that there shall not be rescinded or annulled any such
declaration which follows an event described in Section 6.1(e) without the
written consent of the Credit Provider.

                 In case the Trustee or the City shall have proceeded to
enforce its rights under this Agreement and such proceedings





                                          20
<PAGE>   25


shall have been discontinued or abandoned for any reason or shall have been
determined adversely to the Trustee or the City, then, and in every such case,
the Borrower, the Trustee and the City shall be restored respectively to their
several positions and rights hereunder, and all rights, remedies and powers of
the Borrower, the Trustee and the City shall continue as though no such action
had been taken (provided, however, that any settlement of such proceedings duly
entered into by the City, the Trustee or the Borrower shall not be disturbed by
reason of this provision).

                 The Borrower covenants that, in case an Event of Default shall
occur with respect to the payment of any Repayment Installment payable under
Section 4.2(a) hereof, then, the Borrower will pay to the Trustee the whole
amount that then shall have become due and payable under said Section, with
interest, to the extent permitted by law, on the amount then overdue at the
rate of one percent (1%) per annum over the rate from time to time in effect on
the Bonds until such amount has been paid.

                 In case the Borrower shall fail forthwith to pay such amounts
upon demand of the Trustee, the Trustee shall be entitled and empowered to
institute any action or proceeding at law or in equity for the collection of
the sums so due and unpaid, and may prosecute any such action or proceeding to
judgment or final decree, and may enforce any such judgment or final decree
against the Borrower and collect in the manner provided by law the moneys
adjudged or decreed to be payable.

                 In case proceedings shall be pending for the bankruptcy or for
the reorganization of the Borrower under the federal bankruptcy laws or any
other applicable law, or in case a receiver or trustee shall have been
appointed for the property of the Borrower or in the case of any other similar
judicial proceedings relative to the Borrower, or the creditors or property of
the Borrower, then the Trustee shall be entitled and empowered, by intervention
in such proceedings or otherwise, to file and prove a claim or claims for the
whole amount owing and unpaid pursuant to this Agreement and, in case of any
judicial proceedings, to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee allowed in such judicial proceedings relative to the Borrower, its
creditors or its property, and to collect and receive any moneys or other
property payable or deliverable on any such claims, and to distribute such
amounts as provided in the Indenture after the deduction of its charges and
expenses.  Any receiver, assignee or trustee in bankruptcy or reorganization is
hereby authorized to make such payments to the Trustee, and to pay to the
Trustee any amount due it for compensation and expenses, including expenses and
fees of counsel incurred by it up to the date of such distribution.

                 SECTION 6.3.  AGREEMENT TO PAY ATTORNEYS' FEES AND EXPENSES.
In the event the Borrower should default under any of the provisions of this
Agreement and the City or the Trustee





                                          21
<PAGE>   26


should employ attorneys or incur other expenses for the collection of the
payments due under this Agreement or the Indenture or the enforcement of
performance or observance of any obligation or agreement on the part of the
Borrower herein contained, the Borrower agrees to pay to the City and the
Trustee the reasonable fees of their respective attorneys and such other
expenses so incurred by the City and the Trustee.

                 SECTION 6.4.  NO REMEDY EXCLUSIVE.  No remedy herein conferred
upon or reserved to the City or the Trustee is intended to be exclusive of any
other available remedy or remedies, but each and every such remedy shall be
cumulative and shall be in addition to every other remedy given under this
Agreement or now or hereafter existing at law or in equity or by statute.  No
delay or omission to exercise any right or power accruing upon any default
shall impair any such right or power or shall be construed to be a waiver
thereof, but any such right and power may be exercised from time to time and as
often as may be deemed expedient.  In order to entitle the City or the Trustee
to exercise any remedy reserved to it in this Article, it shall not be
necessary to give any notice, other than such notice as may be herein expressly
required.  Such rights and remedies as are given the City hereunder shall also
extend to the Trustee, and the Trustee and the holders of the Bonds shall be
deemed third party beneficiaries of all covenants and agreements herein
contained, including without limitation covenants and agreements with respect
to (a) the compensation and indemnification of the Trustee and (b) the
provision of any required notices, information and directions to the Trustee.

                 SECTION 6.5.  NO ADDITIONAL WAIVER IMPLIED BY ONE WAIVER.  In
the event any agreement or covenant contained in this Agreement should be
breached by the Borrower and thereafter waived by the City or the Trustee, such
waiver shall be a one-time waiver limited to the particular breach so waived
and shall not be deemed to waive any other breach hereunder.


                                  ARTICLE VII

                                   PREPAYMENT

                 SECTION 7.1.  REDEMPTION OF BONDS WITH PREPAYMENT MONEYS.  By
virtue of the assignment of the rights of the City under this Agreement to the
Trustee as is provided in Section 4.4 hereof, the Borrower agrees to and shall
pay directly to the Trustee any amount permitted or required to be paid by it
under this Article VII to the extent such payment is not timely provided by any
Credit Facility then in effect.  The Trustee shall use the moneys so paid to it
by the Borrower to effect redemption of the Bonds in accordance with Article IV
of the Indenture on the date specified for such redemption pursuant to Section
7.5 hereof.





                                          22
<PAGE>   27


                 SECTION 7.2.  OPTIONS TO PREPAY INSTALLMENTS.  The Borrower
shall have the option to prepay the amounts payable under Section 4.2 hereof by
paying to the Trustee, for deposit in the Bond Fund, the amount set forth in
Section 7.4 hereof, under the circumstances set forth in Section 4.01(a) of the
Indenture.

                 SECTION 7.3.  MANDATORY PREPAYMENT.  (a) The Borrower shall
have and hereby accepts the obligation to prepay Repayment Installments to the
extent mandatory redemption of the Bonds is required pursuant to Section
4.01(b) of the Indenture.  The Borrower shall satisfy its obligation hereunder
by prepaying such Repayment Installments within one hundred eighty (180) days
after the occurrence of any event set forth in paragraphs (1) or (2) of said
Section 4.01(b) giving rise to such required prepayment, and immediately upon
the occurrence of any event set forth in paragraph (3) thereof giving rise to
such required prepayment.  The amount payable by the Borrower in the event of a
prepayment required by this Section shall be determined as set forth in Section
7.4 and shall be deposited in the Bond Fund.

                 SECTION 7.4.  AMOUNT OF PREPAYMENT.  In the case of a
prepayment of the entire amount due hereunder pursuant to Section 7.2 or 7.3
hereof, the amount to be paid shall be a sum sufficient, together with other
funds and the yield on any securities deposited with the Trustee and available
for such purpose, to pay (1) the principal of all Bonds outstanding on the
redemption date specified in the notice of redemption, plus interest accrued
and to accrue to the payment or redemption date of the Bonds, plus premium, if
any, pursuant to the Indenture, (2) all reasonable and necessary fees and
expenses of the City, the Trustee and any paying agent accrued and to accrue
through final payment of the Bonds, and (3) all other liabilities of the
Borrower accrued and to accrue under this Agreement.

                 In the case of partial prepayment of the Repayment
Installments, the amount payable shall be a sum sufficient, together with other
funds deposited with the Trustee and available for such purpose, to pay the
principal amount of and premium, if any, and accrued interest on the Bonds to
be redeemed, as provided in the Indenture, and to pay expenses of redemption of
such Bonds.

                 SECTION 7.5.  NOTICE OF PREPAYMENT.  To exercise an option
granted by this Article VII, the Borrower shall give, at least fifteen (15)
days prior to the last day by which the Trustee is permitted to give notice of
redemption pursuant to Section 4.03 of the Indenture, written notice to the
City and the Trustee specifying the date upon which any prepayment will be
made.  If, in the case of a mandatory prepayment pursuant to Section 7.3
hereof, the Borrower fails to give such notice of a prepayment required by this
Section 7.5, such notice may be given by the City, by the Trustee at the
written direction of the City or by any holder or holders of ten percent (10%)
or more in aggregate principal amount of the Bonds Outstanding. The City and
the Trustee, at the request of the Borrower or any such holder or





                                          23
<PAGE>   28


holders, shall forthwith take all steps necessary under the applicable
provisions of the Indenture (except that the City shall not be required to make
payment of any money required for such redemption) to effect redemption of all
or part of the then outstanding Bonds, as the case may be, on the earliest
practicable date thereafter on which such redemption may be made under
applicable provisions of the Indenture.


                                  ARTICLE VIII

                NON-LIABILITY OF CITY; EXPENSES; INDEMNIFICATION

                 SECTION 8.1.  NON-LIABILITY OF CITY.  The City shall not be
obligated to pay the principal of, or premium, if any, or interest on the
Bonds, or to discharge any other financial liability in connection herewith,
except from Revenues.  The Borrower hereby acknowledges that the City's sole
source of moneys to repay the Bonds will be provided by the payments made by
the Borrower pursuant to this Agreement (excluding payments pursuant to Section
4.2(b), 4.2(c), 5.6, 6.3, 8.2 and 8.3 of this Agreement), together with other
Revenues, including any amounts received pursuant to any Credit Facility or
investment income on certain funds and accounts held by the Trustee under the
Indenture, and hereby agrees that if the payments to be made hereunder shall
ever prove insufficient to pay all principal of, and premium, if any, and
interest on the Bonds as the same shall become due (whether by maturity,
redemption, acceleration or otherwise), then upon notice from the Trustee, the
Borrower shall pay such amounts as are required from time to time to prevent
any deficiency or default in the payment of such principal, premium or
interest, including, but not limited to, any deficiency caused by acts,
omissions, nonfeasance or malfeasance on the part of the Trustee, the Borrower,
the City or any third party; provided that the failure of the Trustee to
deliver such notice shall not affect the obligation of the Borrower to make
such payments when due.

                 SECTION 8.2.  EXPENSES.  The Borrower covenants and agrees to
pay within fifteen (15) days after billing therefor and to indemnify the City
and the Trustee against all costs and charges, including fees and disbursements
of attorneys, accountants, consultants, including financial consultants,
engineers and other experts, incurred in good faith in connection with this
Agreement, the Bonds or the Indenture.  The City shall notify the Borrower in
writing prior to engaging any professional or expert for which the City plans
to bill the Borrower, other than under the circumstances described in Section
6.3 hereof.

                 SECTION 8.3.  INDEMNIFICATION.  The Borrower releases the City
and the Trustee from, and covenants and agrees that neither the City nor the
Trustee shall be liable for, and covenants and agrees, to the extent permitted
by law, to indemnify and hold harmless the City and the Trustee and their
officers, employees and agents from and against, any and all





                                          24
<PAGE>   29


losses, claims, damages, liabilities or expenses, of every conceivable kind,
character and nature whatsoever arising out of, resulting from or in any way
connected with (1) the Project, or the conditions, occupancy, use, possession,
conduct or management of, or work done in or about, or from the planning,
design, acquisition, installation or construction of the Project or any part
thereof; (2) the issuance of any Bonds or any certifications or representations
made in connection therewith and the carrying out of any of the transactions
contemplated by the Bonds, the Indenture and this Agreement;  (3) the Trustee's
acceptance or administration of the trusts under the Indenture, or the exercise
or performance of any of its powers or duties under the Indenture; or (4) any
untrue statement or alleged untrue statement of any material fact or omission
or alleged omission to state a material fact necessary to make the statements
made, in light of the circumstances under which they were made, not misleading,
in any official statement or other offering circular utilized by the City or
any underwriter or placement agent in connection with the sale of any Bonds;
provided that such indemnity shall not be required for damages that result from
negligence or willful misconduct on the part of the party seeking such
indemnity.  The Borrower further covenants and agrees, to the extent permitted
by law, to pay or to reimburse the City and the Trustee and their officers,
employees and agents for any and all costs, attorneys fees, liabilities or
expenses incurred in connection with investigating, defending against or
otherwise in connection with any such losses, claims, damages, liabilities,
expenses or actions, except to the extent that the same arise out of the
negligence or willful misconduct of the party claiming such payment or
reimbursement.  The provisions of this Section shall survive the retirement of
the Bonds or resignation or removal of the Trustee.


                                   ARTICLE IX

                                 MISCELLANEOUS

                 SECTION 9.1.  NOTICES.  All notices, certificates or other
communications shall be deemed sufficiently given on the second day following
the day on which the same have been mailed by first class mail, postage
prepaid, or by telecopy or similar facsimile transmission capable of making a
written record, addressed to the City, the Borrower, the Trustee, the
Registrar, the Paying Agent, the Tender Agent, the Remarketing Agent, the
Credit Provider or the Rating Agencies, as the case may be, as provided in
Section 11.05 of the Indenture.  A duplicate copy of each notice, certificate
or other communication given hereunder by either the City or the Borrower to
the other shall also be given to the Trustee and any Credit Provider.  The
City, the Borrower, the Trustee and the Credit Provider may, by notice given
hereunder, designate any different addresses to which subsequent notices,
certificates or other communications shall be sent.





                                          25
<PAGE>   30


                 SECTION 9.2.  SEVERABILITY.  If any provision of this
Agreement shall be held or deemed to be, or shall in fact be, illegal,
inoperative or unenforceable, the same shall not affect any other provision or
provisions herein contained or render the same invalid, inoperative, or
unenforceable to any extent whatever.

                 SECTION 9.3.  EXECUTION OF COUNTERPARTS.  This Agreement may
be simultaneously executed in several counterparts, each of which shall be an
original and all of which shall constitute but one and the same instrument;
provided, however, that for purposes of perfecting a security interest in this
Agreement under Article 9 of the California Uniform Commercial Code, only the
counterpart delivered, pledged, and assigned to the Trustee shall be deemed the
original.

                 SECTION 9.4.  AMENDMENTS, CHANGES AND MODIFICATIONS.
Subsequent to the initial issuance of Bonds and prior to their payment in full,
or provision for such payment having been made as provided in the Indenture,
this Agreement may not be effectively amended, changed, modified, altered or
terminated without the written consent of the Trustee.

                 SECTION 9.5.  GOVERNING LAW.  This Agreement shall be governed
by and construed in accordance with the applicable laws of the State of
California, except that the duties and obligations of the Trustee shall be
governed by the laws of the State of New York.

                 SECTION 9.6.  AUTHORIZED BORROWER REPRESENTATIVE.  Whenever
under the provisions of this Agreement the approval of the Borrower is required
or the City or the Trustee is required to take some action at the request of
the Borrower, such approval or such request shall be given on behalf of the
Borrower by the Authorized Borrower Representative, and the City and the
Trustee shall be authorized to act on any such approval or request without
liability and neither party hereto shall have any complaint against the other
or against the Trustee as a result of any such action taken.

                 SECTION 9.7.  TERM OF THE AGREEMENT.  This Agreement shall be
in full force and effect from the date hereof and shall continue in effect as
long as any of the Bonds is outstanding or the Trustee holds any moneys under
the Indenture, whichever is later.  All representations and certifications by
the Borrower as to all matters affecting the tax-exempt status of the Bonds
shall survive the termination of this Agreement.

                 SECTION 9.8.  BINDING EFFECT.  This Agreement shall inure to
the benefit of and shall be binding upon the City, the Borrower and their
respective successors and assigns; subject, however, to the limitations
contained in Section 5.2 hereof.

                 SECTION 9.9.  THE CREDIT PROVIDER.  All provisions hereof
regarding consents, approvals, directions, appointments or





                                          26
<PAGE>   31


requests by the Credit Provider shall be deemed not to require or permit such
consents, approvals, directions, appointments or requests by the Credit
Provider and shall be read as if the Credit Provider were not mentioned therein
during any time in which the Credit Provider is in default under the Credit
Facility, or after the Credit Facility shall at any time for any reason cease
to be valid and binding on the Credit Provider, or shall be declared to be null
and void, or while the Credit Provider is denying further liability or
obligation under the Credit Facility or after the Credit Provider has
rescinded, repudiated or terminated the Credit Facility.

                  All provisions herein relating to the Credit Provider shall
be of no force and effect if there is no Credit Facility or Credit Agreement in
effect and there are no Bonds held by the Credit Provider and all amounts owing
to the Credit Provider under the Credit Agreement have been paid.





                                          27
<PAGE>   32


                 IN WITNESS WHEREOF, the City of Big Bear Lake has caused this
Agreement to be executed in its name and its seal to be hereunto affixed and
attested by its duly authorized officers, and Southwest Gas Corporation has
caused this Agreement to be executed in its name and its seal to be hereunto
affixed by its duly authorized officers, all as of the date first above
written.

                                                   CITY OF BIG BEAR LAKE



                                                   By __________________________
                                                                 Mayor

[SEAL]

Attest:



____________________________
         City Clerk



                                                   SOUTHWEST GAS CORPORATION



                                                   By __________________________
[SEAL]                                                    Treasurer

Attest:



____________________________
     Assistant Secretary




 
                                         28
<PAGE>   33


                                   EXHIBIT A

                           DESCRIPTION OF THE PROJECT

                 The Project shall consist of those certain additions and
improvements to, and replacements of, the Borrower's natural gas distribution
and transmission system through which the Borrower furnishes natural gas to its
customers in San Bernardino County, California, and certain other plant,
property and equipment used or to be used for the same purposes.  The Project
includes, without limitation, meters, customer service connections, mains,
pressure regulators and other additions and improvements to, and replacements
of, the facilities which comprise the Borrower's natural gas distribution and
transmission system, including associated land and land rights.




                                     A-1


<PAGE>   34


                                   EXHIBIT B

                     FORM OF CONSTRUCTION FUND REQUISITION

To:      ______________________________, as trustee under that certain
         Indenture of Trust, dated as of December 1, 1993 (the "Indenture"),
         between the City of Big Bear Lake (the "City") and said trustee.

Pursuant to Section 3.03 of the Indenture and Section 3.3 of the Project
Agreement, dated as of December 1, 1993 (the "Agreement"), between the City and
Southwest Gas Corporation (the "Borrower"), the Borrower hereby makes the
following requisition from the Construction Fund held under the Indenture:

Requisition No. R-__

Pay to the Order of:      Name:  ___________________________________________
                          Address: _________________________________________
              ______________________________________________________________
              ______________________________________________________________
              
Purpose of Payment:  _______________________________________________________    
        ____________________________________________________________________
        ____________________________________________________________________
        
Amount: $ __________.__

The undersigned hereby certifies and represents as follows:

         (1)     the foregoing payment obligation has been properly incurred
                 and is a proper charge against the Construction Fund;

         (2)     none of the items for which payment is requested has been
                 previously reimbursed from the Construction Fund;

         (3)     each item for which payment is requested is or was necessary
                 in connection with the acquisition, construction, installation
                 or financing of the Project; and

         (4)     100% of the amount requisitioned, together with all other
                 amounts requisitioned to date, in the aggregate represents a
                 Qualifying Cost as defined in the Tax Certificate (excluding
                 costs of issuance of the Bonds).

                                                   SOUTHWEST GAS CORPORATION


                                                   By ______________________
                                                   Name:
                                                   Title:





                                         B-1

<PAGE>   1
                                                                   EXHIBIT 10.08



                           SOUTHWEST GAS CORPORATION

                               BOARD OF DIRECTORS

                                RETIREMENT PLAN




                           Effective January 1, 1988
                         Amended Effective May 9, 1990
                 Amended and Restated Effective October 1, 1993
<PAGE>   2
                SOUTHWEST GAS BOARD OF DIRECTORS RETIREMENT PLAN




PURPOSE

The principal objective of this Board of Directors Retirement Plan is to ensure
that a competitive level of retirement income is paid in order to attract and
retain Directors of the Southwest Gas Corporation.  The Plan is designed to
provide a benefit that will meet this objective.  Eligibility for participation
in the Plan shall be limited to outside, nonemployee Directors retiring after
January 1, 1988.  The original Plan was effective on January 1, 1988 and
amended May 9, 1990.  This plan, as amended and restated shall apply to
outside, nonemployee Directors retiring on or after October 1, 1993.



                                I.  DEFINITIONS


1.1         "Board" means the Board of Directors of the Company.

1.2         "Committee" means the Nominating and Compensation Committee of the
            Board to which the Board has given authority to administer this
            Plan.

1.3         "Company" means Southwest Gas Corporation.

1.4         "Director" means an outside, nonemployee member of the Board.

1.5         "Effective Date" previously was January 1, 1988.  This amendment
            and restatement of the Plan is effective October 1, 1993.

1.6         "Participant" means an outside, nonemployee Director.  Inside
            Directors and/or Company retirees are excluded from participation
            in the Plan.

1.7         "Plan" is the Southwest Gas Board of Directors Retirement Plan as
            described in this document.

1.8         "Retiree" means a former Director eligible for or receiving
            benefits from the Plan.

1.9         "Retirement" means the termination of a Director's service on the
            Board on one of the retirement dates specified in Section 2.1.





October 14, 1993                                                       1
<PAGE>   3
                SOUTHWEST GAS BOARD OF DIRECTORS RETIREMENT PLAN




1.10        "Service" means the years a Director has served as a member of the
            Board, including service before and after January 1, 1988.

1.11        The masculine gender appearing in the Plan will be deemed to
            include the feminine gender, and the singular may include the
            plural, unless the context clearly indicates the contrary.



                         II.  ELIGIBILITY FOR BENEFITS

2.1         Each Participant is eligible to retire and receive a benefit under
            this Plan beginning on one of the following dates, provided he
            qualifies:

            (a)        "Normal Retirement Date," which is the first day of the
                       month following the month in which the Participant
                       reaches age 65, provided he has at least 10 years of
                       service and is a member of the Board at the time of
                       retirement.

            (b)        "Mandatory Retirement Date," which is the first day of
                       the month following the month in which the Participant
                       reaches age 72, provided he has at least 10 years of
                       service.

            (c)        "Postponed Retirement Date," which is the first day of
                       the month following the Participant's Normal Retirement
                       Date, but no later than the Mandatory Retirement Date,
                       in which the Participant terminates service on the
                       Board, provided he has at least 10 years of service and
                       is a member of the Board at the time of retirement.

            (d)        "Disability Retirement Date," which is the first day of
                       the month following the month in which the Participant's
                       total and permanent disability began, as determined by
                       the Committee, but no later than the Participant's
                       Normal Retirement Date, provided he has at least 10
                       years of service and is a member of the Board at the
                       time of disability.





October 14, 1993                                                       2
<PAGE>   4
                SOUTHWEST GAS BOARD OF DIRECTORS RETIREMENT PLAN




2.2         A Participant is eligible to take "Early Retirement" from the Board
            prior to age 65 provided he has at least 10 years of service and is
            a member of the Board at the time of retirement.  The Participant
            taking an "Early Retirement" will be eligible to receive Normal
            Retirement Benefits when he reaches age 65.


                  III.  AMOUNT AND FORM OF RETIREMENT BENEFIT


3.1         NORMAL RETIREMENT BENEFIT.  The annual retirement benefit payable
            under the Plan will be the amount of the Director's annual retainer
            fee on the date of retirement and will be paid for life.

3.2         EARLY RETIREMENT BENEFIT.  The annual retirement benefit payable
            for Early Retirement under the Plan will be the amount of the
            Director's annual retainer fee on date of retirement and will be
            paid for life, commencing at age 65.

3.3         POSTPONED RETIREMENT BENEFIT.  The annual retirement benefit
            payable at a Postponed Retirement Date under the Plan will be the
            amount of the Director's annual retainer fee on the date of
            retirement and will be paid for life.

3.4         DISABILITY RETIREMENT BENEFIT.  The annual retirement benefit under
            the Plan for a totally and permanently disabled Participant,
            payable at a Disability Retirement Date, will be the amount of the
            Director's annual retainer fee on the date of disability
            retirement.

3.5         DISCRETIONARY BENEFITS.  The Board may, at its sole discretion,
            grant to an eligible Participant an increased benefit of $1,000 per
            year for life for each 10-year period of service beyond the minimum
            qualifying service period of 10 years.





October 14, 1993                                                       3
<PAGE>   5
                SOUTHWEST GAS BOARD OF DIRECTORS RETIREMENT PLAN




                      IV.  PAYMENT OF RETIREMENT BENEFITS


4.1         One-quarter of the benefit determined in accordance with Section
            III will be payable on the first day of each calendar quarter.  The
            initial benefit payment will be paid at the time of retirement or
            within 30 days thereof, and will be prorated for a partial quarter
            if the retirement date is not on the first day of a quarter.

4.2         Benefit payments will cease on the first day of the calendar
            quarter following the Retiree's death.



                           V.  DEATH BENEFITS PAYABLE


5.1         No benefits are payable under this Plan in the event of death.



                               VI.  MISCELLANEOUS


6.1         The Board may, at its sole discretion, terminate, suspend, or amend
            this Plan or reduce the eligibility requirements for an individual
            Participant at any time or from time to time, in whole or in part.
            However, no amendment or suspension of the Plan will affect a
            Retiree's right to continue to receive a benefit in accordance with
            this Plan as in effect on the date such Retiree began to receive a
            benefit under this Plan.

6.2         No Director will participate in an action of the Committee or Board
            on a matter that solely applies to that Director.  Such matters
            will be determined by a majority of the rest of the Committee or
            the Board.

6.3         Nothing contained herein will confer on any Participant the right
            to be retained in the service of the Company, nor will it interfere
            with the Company's right to discharge or otherwise deal with
            Participants without regard to the Plan's existence.





October 14, 1993                                                       4
<PAGE>   6
                SOUTHWEST GAS BOARD OF DIRECTORS RETIREMENT PLAN




6.4         The Plan is unfunded, and the Company will make Plan benefit
            payments solely on a current disbursement basis.

6.5         To the maximum extent permitted by law, no interest or benefit
            under this Plan shall be assignable or subject in any manner to
            alienation, sale, transfer, claims of creditors, pledge, attachment
            or encumbrances of any kind.

6.6         The Committee may adopt rules and regulations to assist it in
            administering the Plan.

6.7         Each Participant will receive a copy of this Plan, and the
            Committee will make available for any Participant's inspection a
            copy of the rules and regulations the Committee uses in
            administering the Plan.

6.8         This Plan is established under, and will be construed according to,
            the laws of the State of Nevada.


                                                       SOUTHWEST GAS CORPORATION



                                                       By ______________________
                                                              Kenny C. Guinn
                                                           Chairman of the Board


                                                       By ______________________
                                                             Michael O. Maffie
                                                             President and CEO


                                                       Date ____________________





October 14, 1993                                                       5

<PAGE>   1

                                                              EXHIBIT 10.13


                          AGREEMENT TO PURCHASE ASSETS

                             AND ASSUME LIABILITIES

                                    BETWEEN

                      WORLD SAVINGS AND LOAN ASSOCIATION,

                               PRIMERIT BANK, FSB

                                      AND

                           SOUTHWEST GAS CORPORATION
<PAGE>   2
                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
ARTICLE                                                                                                    PAGE
- -------                                                                                                    ----
<S>        <C>                                                                                              <C>
I.         DEFINITIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

II.        TERMS OF PURCHASE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
           2.1            Purchase and Sale of Assets   . . . . . . . . . . . . . . . . . . . . . . . . . .   5
           2.2            Assumption of Liabilities   . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
           2.3            No Other Debt, Obligations or Liabilities Assumed   . . . . . . . . . . . . . . .   5
           2.4            Purchase Price  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
           2.5            Consideration for Assumption of Deposits  . . . . . . . . . . . . . . . . . . . .   6
           2.6            Prorations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
           2.7            Allocation of Purchase Price  . . . . . . . . . . . . . . . . . . . . . . . . . .   6

III.       DUE DILIGENCE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
           3.1            Fixed Assets Inventory & Inspection   . . . . . . . . . . . . . . . . . . . . . .   7
           3.2            Deposits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
           3.3            Account Loans   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
           3.4            Contracts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9

IV.        CLOSING  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
           4.1            Closing   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
           4.2            Payment Due at Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
           4.3            Post Closing Adjustments  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
           4.4            Disputes as to Calculations   . . . . . . . . . . . . . . . . . . . . . . . . . .  10
           4.5            Deliveries by Seller  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
           4.6            Deliveries by Buyer   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10

V.         REPRESENTATIONS AND WARRANTIES OF BUYER  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
           5.1            Organization and Authority  . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
           5.2            Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
           5.3            Governmental Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

VI.        REPRESENTATIONS AND WARRANTIES OF SELLER   . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
           6.1            Organization and Authority  . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
           6.2            Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
           6.3            Governmental Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
</TABLE>





                                      -i-
<PAGE>   3
<TABLE>
<S>        <C>                                                                                              <C>
           6.4            Compliance with Law   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
           6.5            Title to Assets   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
           6.6            Deposits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.7            Insurance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.8            Taxes   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.9            Financial Information   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.10           Information for Regulatory Approvals  . . . . . . . . . . . . . . . . . . . . . .  13
           6.11           Operation   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.12           Condemnation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
           6.13           Account Loans   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
           6.14           Employees   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14

VII.       COVENANTS OF BUYER   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
           7.1            Regulatory Notices and Applications   . . . . . . . . . . . . . . . . . . . . . .  16
           7.2            Further Assurance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
           7.3            Performance of Liabilities  . . . . . . . . . . . . . . . . . . . . . . . . . . .  17

VIII.      COVENANTS OF SELLER  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
           8.1            Access to Records and Information; Personnel;
                             Customers; Employees   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
           8.2            Conduct of Business Pending Closing   . . . . . . . . . . . . . . . . . . . . . .  18
           8.3            New Employees   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
           8.4            Regulatory Approvals  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
           8.5            Consents; Compliance With Information   . . . . . . . . . . . . . . . . . . . . .  19
           8.6            Repair or Substitution of Fixed Assets  . . . . . . . . . . . . . . . . . . . . .  19
           8.7            Removal of Property   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
           8.8            Insurance Policies  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
           8.9            Furnishing Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
           8.10           Operations of Branch Offices  . . . . . . . . . . . . . . . . . . . . . . . . . .  20
           8.11           Further Assurances  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

IX.        CONDITIONS TO CLOSING  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
           9.1            Conditions to the Obligations of Seller   . . . . . . . . . . . . . . . . . . . .  20
           9.2            Conditions to the Obligations of Buyer  . . . . . . . . . . . . . . . . . . . . .  22
</TABLE>




                                      -ii-
<PAGE>   4
<TABLE>
<S>        <C>                                                                                              <C>
X.         TERMINATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
           10.1           Events of Termination   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
           10.2           Manner of Termination   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24

XI.        EMPLOYEES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
           11.1           Employees   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
           11.2           Employee Benefits   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
           11.3           Indemnity   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

XII.       OTHER AGREEMENTS   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
           12.1           Returned Items  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
           12.2           Holds   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
           12.3           Direct Deposits   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
           12.4           Backup Withholding  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
           12.5           Checking Accounts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
           12.6           IRA and Keogh Accounts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
           12.7           Delivery of Records   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
           12.8           Interest Reporting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
           12.9           Notices to Depositors   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
           12.10          Card Processing and Overdraft Coverage  . . . . . . . . . . . . . . . . . . . . .  29
           12.11          ABA Number  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
           12.12          Transition Assistance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29

XIII.      GENERAL PROVISIONS   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
           13.1           Survival  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
           13.2           Indemnification   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
           13.3           No Broker or Finder   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
           13.4           Publicity   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
           13.5           Incorporation of Exhibits   . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
           13.6           Attorneys' Fees   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
           13.7           Costs   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
           13.8           Notices   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
           13.9           Assignment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
           13.10          Successors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
           13.11          Governing Law   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
           13.12          Entire Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
           13.13          Headings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
           13.14          Severability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
           13.15          Waiver  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
           13.16          Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
</TABLE>





                                     -iii-
<PAGE>   5
                          AGREEMENT TO PURCHASE ASSETS
                             AND ASSUME LIABILITIES


         This Agreement to Purchase Assets and Assume Liabilities ("
Agreement") is made and entered into this __ day of May, 1993, by and between
World Savings and Loan Association, a Federal Savings and Loan Association
("Buyer"), and PriMerit Bank, FSB, a Federal Savings Bank ("Seller").

                                    RECITALS

         A.      Buyer desires to acquire certain assets and assume certain
liabilities of Seller and Seller desires to transfer to Buyer such assets and
liabilities, as described in detail below.

         B.      Buyer and Seller wish to consummate the transactions
contemplated by this Agreement in a timely and effective manner.

         In consideration of the foregoing and the representations, covenants
and agreements set forth in this Agreement, the parties agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

         1.1     Definitions.  As used in this Agreement, the following terms
have the definitions indicated:

         "Account Loans" shall have the meaning assigned to it in Section 3.3
of the Agreement.

         "Accrued Interest" means interest on deposits or loans, as the case
may be, which is accrued but unpaid through a particular date.

         "Affiliate" of a party means any person, partnership, corporation,
association or other legal entity directly or indirectly controlling,
controlled by or under common control with that party.

         "Assets" means the Fixed Assets, the Account Loans, the Cash on Hand,
the Records and the Core Deposit Intangible.

         "Assumed Contracts" shall have the meaning assigned to it in 
Section 3.4 of the Agreement.
<PAGE>   6
                                       2

         "Branch Offices" means those Seller branches listed on Schedule 1.

         "Brokered Deposits" shall have the meaning set forth in 12 C.F.R.
Section 337.6.

         "Cash on Hand" means all petty cash, vault cash, teller cash and ATM
cash located at a Branch Office.  At the Closing, Seller shall deliver to Buyer
a schedule ("Schedule 1.1 ") indicating the amount and location of the Cash on
Hand as of the close of business on the day preceding the Closing Date.

         "Closing" and "Closing Date" shall have the meanings assigned to them
in Section 4.1 of the Agreement.

         "Code" shall mean the Internal Revenue Code of 1986, as amended.

         "Company Employee Plan" shall refer to any Employee Plan which is now
or, within five (5) years prior to the Closing Date, has been maintained,
contributed to, or required to be contributed to, for the benefit of any
Employee, and pursuant to which the Seller or any ERISA Affiliate has or may
have any liability, contingent or otherwise.

         "Core Deposits" means the aggregate amount of Deposits, together with
all Accrued Interest thereon, but excluding: (i) Escheatable Deposits, (ii)
Public Fund Accounts, (iii) Brokered Deposits, (iv) the portion of any Deposits
in excess of $100,000, (v) Foreign Deposits, (vi) the portions of Deposits that
secure Account Loans, (vii) commercial or business accounts, (viii) Deposits
involved in pending or threatened litigation, and (ix) Deposits owned by any
Affiliate of Seller or owned by any current employee of Seller not hired by
Buyer effective upon the Closing. Although the Core Deposits are a liability of
Seller that will be assumed together with other Deposits pursuant to Section
2.2(a), as a source of funds the Core Deposits represent a valuable asset,
separate and distinct from goodwill, which Seller wishes to sell and Buyer
wishes to purchase.

         "Core Deposit Intangible" shall have the meaning assigned to it in 
Section 2.7 of the Agreement.

         "Deposit Premium" means .20% of the aggregate amount of the Core
Deposits as of the close of business on the Closing Date.  The Deposit Premium
represents the reasonable value of the Core Deposit Intangible associated with
the Core Deposits.

         "Deposits" shall have the meaning assigned to it in Section 3.2 of the
Agreement.

         "Employee" shall mean any current employee, officer, consultant,
independent contractor, agent or director of the Seller or any of its
subsidiaries, who performs services
<PAGE>   7
                                       3

at any of the Branch Offices during the period commencing on the date of this
Agreement and ending on the Closing Date.

         "Employee Agreement" shall refer to each management, employment,
severance, consulting, non-compete, confidentiality, or similar agreement or
contract between the Seller or any of its subsidiaries and any Employee.

         "Employee Plan" shall refer to any plan, program, policy, payroll
practice, contract, or other arrangement providing for compensation, severance,
termination pay, performance awards, stock or stock-related awards, fringe
benefits or other employee benefits of any kind, whether formal or informal,
funded or unfunded and whether or not legally binding, including, without
limitation, each "employee benefit plan," within the meaning of Section 3(3) of
ERISA.

         "Encumbrances" means all mortgages, claims, charges, liens,
encumbrances, easements, restrictions, options, pledges, calls, commitments,
security interests, conditional sales agreements, title retention agreements,
leases and other restrictions of any kind whatsoever.

         "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

         "ERISA Affiliate" shall mean any business or entity which is a member
of a "controlled group of corporations," under "common control" or an
"affiliated service group" with the Seller within the meaning of Sections
414(b), (c) or (m) of the Code, or required to be aggregated with the Seller
under Section 414(o) of the Code, or is under "common control" with the Seller
within the meaning of Section 4001(a)(14) of ERISA, or any regulations
promulgated or proposed under any of the foregoing Sections.

         "Escheatable Deposits" means savings accounts or checking deposits at
the Branch Offices which have had no activity or customer contact for at least
three years prior to the Closing Date.

         "FDIC" means the Federal Deposit Insurance Corporation and any
successor thereto.

         "Federal Funds Rate" means for any day, the avenge of the dally high
and low interest rates for federal funds for the previous business day as
reported in such day's Wall Street Journal.

         "Fixed Assets" shall have the meaning assigned to it in Section 3.1 of
the Agreement.
<PAGE>   8
                                       4

         "Foreign Deposits" means all Deposits at the Branch Offices in the
names of persons whose primary or seasonal addresses as they appear on the
records of the Seller are not in the State of Arizona.

         "IRS" shall mean the Internal Revenue Service.

         "Knowledge" means, with respect to Seller, the actual knowledge or
knowledge which reasonably should have been obtained, after due diligence, of
one or more of the following employees of Seller: any branch manager of the
Branch Offices, any vice president, senior vice president, chief financial
officer, chief administrative officer, executive vice president, and chief
executive officer.  "Knowledge" means, with respect to Buyer, the actual
knowledge or knowledge which reasonably should have been obtained after due
diligence, of one or more of the following employees of Buyer: any vice.
president, senior vice president, group senior vice president, executive vice
president or chief executive officer.

         "Losses" shall mean any and all losses, damages, costs and expenses,
including reasonable attorneys' fees, and any excise and penalty taxes.

         "Multiemployer Plan" shall mean any Pension Plan which is a
"multiemployer plan," as defined in Sections 3(37) and 4001(a)(3) of ERISA.

         "Net Book Value" means, with respect to any asset, the total book
value of the asset less applicable reserves, encumbrances and other deductible
items, as reflected in the financial statements of Seller computed in
accordance with generally accepted accounting principles consistently applied,
plus any accrued interest thereon, excluding purchase accounting adjustments
recorded as a result of Seller's acquisition of Union Savings and Loan
Association.

         "OTS" means the Office of Thrift Supervision and any successor thereto.

         "Pension Plan" shall refer to each Company Employee Plan which is an
"employee pension benefit plan," within the meaning of Section 3(2) of ERISA,
and each "employee pension benefit plan" with respect to which the Seller or
any ERISA Affiliate may have any liability.

         "Public Fund Accounts" means a savings or checking account containing
the funds of a state, county, municipality or other government unit or
subdivision.

         "Records" means (i) all records and original documents pertaining to
the Assets (including warranties on Fixed Assets) and (ii) all records and
original documents relating to the Deposits.

         "WARN Act" means the Worker Adjustment and Retraining Notification
Act, as amended.
<PAGE>   9
                                       5

                                   ARTICLE II

                               TERMS OF PURCHASE

         2.1     Purchase and Sale of Assets. At the Closing and subject to the
terms and conditions set forth in this Agreement, Seller shall convey, assign
and transfer to Buyer and Buyer shall purchase from Seller all of Seller's
right, title and interest in and to the following assets:

                 (a)      The Fixed Assets;

                 (b)      The Account Loans;

                 (c)      The Cash on Hand;

                 (d)      The Records; and

                 (e)      The Core Deposit Intangible.

         2.2     Assumption of Liabilities.

                 (a)      Deposits. As of the close of business on the Closing
Date, subject to the terms and conditions set forth in this Agreement, Buyer
shall assume liability for the payment and performance of Seller's obligations
on the Deposits in accordance with the terms of such Deposits in effect on the
Closing Date.

                 (b)      Safe Deposit Box Business. As of the close of
business on the Closing Date, Buyer will assume the obligations of Seller
relating to the safe deposit box business conducted at the Branch Offices, as
may be modified to conform to Buyer's conduct of business.

                 (c)      Assumed Contracts. As of the close of business of the
Closing Date, Buyer shall assume the obligations of the Seller with respects to
the Assumed Contracts.

         2.3     No Other Debt. Obligation or Liabilities Assumed. It is
understood and agreed that, except as expressly set forth in this Agreement,
Buyer shall not assume or be liable for any of the debts, obligations or
liabilities of Seller of any kind or nature whatsoever including, but not
limited to, any tax; any debt; any insurance premium; any liability for unfair
labor practices (such as wrongful termination or employment discrimination) or
under the WARN Act; any liability or obligation with respect to the Deposits
except the obligation to pay the principal amount of each Deposit plus Accrued
Interest; any liability arising out of or with respect to any of the Assets
prior to the close of business on the Closing Date; any liability or obligation
of Seller arising out of any
<PAGE>   10
                                       6

threatened or pending litigation; or any liability with respect to personal
injury or property damage claims.

         2.4     Purchase Price. The purchase price of the Assets will be an
amount equal to the sum of the following:

                 (a)      A sum equal to the Net Book Value of the Fixed Assets
as of the close of business on the Closing Date;

                 (b)      A sum equal to the Net Book Value of the Account
Loans as of the close of business on the Closing Date;

                 (c)      The amount of all Cash on Hand as of the close of
business on the Closing Date; and

                 (d)      The Deposit Premium.

         2.5     Consideration for Assumption of Deposits.  As consideration
for the assumption of the Deposits, Seller shall pay to Buyer at the Closing
one hundred percent (100% ) of the aggregate amount of the Deposits as of the
close of business on the Closing Date, including Accrued Interest thereon.

         2.6     Prorations.  All ordinary operating expenses relating to the
Branch Offices, deferred or prepaid, including, without limitation, wages,
salaries, rents, utility payments, liability and casualty insurance premiums,
property taxes and assessments, FDIC insurance premiums and payments under
Assumed Contracts, and the aggregate amount of collected but unearned fees,
rentals and premiums paid in advance in connection with operations at the
Branch Offices, including, without limitation, all safe deposit box fees and
rentals, shall be prorated between the parties on the basis of a thirty (30)
day month and a 360 day year as of the close of business on the Closing Date.
All security deposits under leases and utility contracts (to the extent
transferred to Buyer) shall be credited to Seller. At the Closing, Seller shall
deliver to Buyer a schedule ("Schedule 2.6") indicating the type and amount of
expenses, fees and security deposits to be prorated or credited under this
Section 2.6 as of the close of business on the Closing Date.

         2.7     Allocation of Purchase Price.  Buyer and Seller agree that the
allocation of the purchase price will be made based on the relative fair market
value of the assets acquired as required by Section 1060 of the Code, and agree
to utilize such allocation for federal income tax purposes.  Such allocation,
as set forth in Exhibit 1 hereto, will be consistently reflected by each party
on their federal income tax returns and similar documents, including but not
limited to IRS Form 8594.  Neither party shall file any document or assert any
position that conflicts or is inconsistent with such allocation, and each party
agrees to inform the other promptly upon receipt of any communication from (or
forwarding any communication to) the IRS relating to IRS Form 8594.  Each party
shall
<PAGE>   11
                                       7

cooperate fully with the other in preparing and filing IRS Form 8594.

         In connection with the preparation of such allocation the parties
acknowledge that one of the principal effects of the Agreement is the transfer
of an additional asset (referred to herein as the "Core Deposit Intangible"),
the value of which is the primary     reason Buyer has agreed to pay the
Deposit Premium described in Section 2.4(d) of the Agreement.  Accordingly, the
parties agree that, in the preparation of IRS Form 8594 or any other asset
allocation statement, the Core Deposit Intangible shall be taken into account
and shall be assigned the fair market value mutually agreed upon by Buyer and
Seller and as forth in Exhibit 1 hereto.


                                  ARTICLE III

                                 DUE DILIGENCE

         3.1     Fixed Assets Inventory and Inspection.  Within ten (10)
business days after the date of this Agreement, Seller shall deliver to Buyer a
schedule of the furniture, equipment and other tangible personal property owned
by Seller and located at each of the Branch Offices (referred to herein as
Schedule 3.1), prepared as of the date of this Agreement.  Schedule 3.1 shall
identify each item of such property with reasonable particularity, giving the
Net Book Value on Seller's books and describing any and all security interests
therein or other lien thereon.  Buyer shall be entitled to conduct a
walk-through inspection of each Branch Office after receipt of Schedule 3.1 to
inspect such property.  In the event that any of such property as reported on
the Schedule 3.1 is missing, malfunctioning or in a deteriorated condition, is
subject to any liens as of the Closing, or in the event Buyer determines, in
its sole discretion, that it cannot readily use such property, Buyer may elect
to exclude the property from the transfer under this Agreement.  Buyer intends
to exclude ATMs, teller terminals, and other data processing equipment not
compatible with the Buyer's data processing system.  At the Closing, Seller
agrees to provide Buyer an updated Schedule 3.1 listing all of the items of
property remaining after any such exclusions (hereinafter the "Fixed Assets")
and listing, among other things, the Net Book Value of each item calculated as
of the close of business on the month-end preceding the Closing Date.  A final
Schedule 3.1 shall list the Net Book Value of each item as of the close of
business on the Closing Date.  The final Schedule 3.1 shall be delivered to
Buyer at the Post-Closing pursuant to Section 4.3.

         3.2     Deposits. Within ten (10) business days after the date of this
Agreement, Seller shall deliver a schedule of all savings accounts, checking
accounts and certificates of deposit domiciled at the Branch Offices, together
with all Accrued Interest thereon (referred to herein as Schedule 3.2),
prepared as of the date of this Agreement, listing by Branch Office and by
category the amount of all deposits and the interest rates and maturity dates
associated with such deposits.  Included as a part of this preliminary deposit
schedule shall be a true copy of the form of all contracts, agreements, and
other documents governing or specifying the terms of the deposit relationship
between Seller and the holders of such deposit accounts.  It is the intention
of Buyer to purchase substantially
<PAGE>   12
                                       8

all the deposit accounts; however, Buyer shall have the right to exclude any
deposit accounts it is unwilling to assume for legal or operational reasons.
Not less than thirty (30) days prior to the Closing Date, Buyer shall provide
Seller with a list of deposits (referred to herein as Schedule 3.2A) which are
being excluded in good faith for legal or operational reasons. Within
twenty-one (21) days of, but no less than fourteen (14) days prior to the
Closing Date, Seller will provide Buyer with a list of all deposits domiciled
at the Branches that are subject to any Encumbrances other than Encumbrances
related to Account Loans.  Within five days of the Closing Date, Buyer will
notify Seller of any deposits subject to Encumbrances that the Buyer has
determined to exclude from the deposits to be transferred pursuant to this
Agreement (referred to herein as Schedule 3.2B).  The balances of the deposits
after such exclusions, (collectively referred to herein as the "Deposits"),
together with Accrued Interest thereon shall be reflected on an updated
Schedule 3.2 as of the close of business on a date no more than forty-eight
(48) hours prior to the Closing Date, which schedule shall also indicate the
Deposits that constitute Core Deposits.  The updated Schedule 3.2 shall be
delivered by Seller to Buyer at the Closing.  A final Schedule 3.2 shall
reflect the Deposits as of the close of business on the Closing Date, shall
indicate the Deposits that constitute Core Deposits and shall indicate the
Deposits subject to Encumbrances other than Encumbrances related to Account
Loans.  The Buyer shall have the right upon notice to Seller to exclude any
Deposits from the final Schedule 3.2 subject to any such Encumbrances.  The
final Schedule 3.2 shall be delivered to Buyer at the Post-Closing pursuant to
Section 4.3.  Seller shall provide Buyer with any information with respect to
Core Deposits reasonably requested by the Buyer.

         3.3     Account Loans.  Within ten (10) business days after the date
of this Agreement, Seller shall provide Buyer with a schedule of all savings
account loans secured by deposits domiciled at the Branch Offices together with
all accrued and unpaid interest thereon (referred to herein as Schedule 3.3).
Schedule 3.3 shall set forth the unpaid principal balances, rates of interest
and principal terms of such loans, and shall include a true copy of the forms
of all contracts governing or specifying the terms of the borrowing
relationships between Seller and the borrowers under such loans.  Buyer may by
notice to Seller exclude from Schedule 3.3 (i) any loan that is not current or
is thirty (30) or more days delinquent, (ii) any loan that was not underwritten
based upon Seller's normal underwriting standards, (iii) any loan that is not
secured solely and fully by Deposits domiciled at the Branch Offices and (iv)
any loan as to which Seller has been notified that the borrower has filed a
petition in bankruptcy.  An updated Schedule 3.3 of the loans remaining after
any exclusions by Buyer and reflecting the balance of such loans (collectively
referred to herein as "Account Loans"), together with accrued interest thereon
as of the close of business on a date no more than forty-eight (48) hours prior
to the Closing Date, and indicating the unpaid principal balances, rates of
interest and principal terms of such Account Loans, shall be delivered by
Seller to Buyer at the Closing.  A final Schedule 3.3 shall reflect the balance
of the Account Loans as of the close of business on the Closing Date.  The
final Schedule 3.3 shall be delivered to Buyer at the Post-Closing pursuant to
Section 4.3.  Buyer shall not purchase any loans under this Agreement other
than the Account Loans.
<PAGE>   13
                                       9

         3.4     Contracts.  Within ten (10) business days after the date of
this Agreement, Seller shall provide Buyer with a schedule of all contracts of
any kind relating to the operation and the business of the Branch Offices,
including, among other things, maintenance contracts, service contracts, note
collection agreements, safe deposit box contracts, messenger contracts and
personal property leases (such schedule to be referred to herein as Schedule
3.4). Schedule 3.4 shall indicate whether the consent of a third party is
required in order for each such contract to be assigned to Buyer.  Buyer shall
have the right to inspect the contracts identified on Schedule 3.4 and may by
notice to Seller exclude from Schedule 3.4 any contract that: (i) is not
assignable by its terms or (ii) Buyer determines is not necessary or desirable
for the operation of the Branch Offices, provided that Buyer may not exclude
any maintenance contracts related to the Fixed Assets to be purchased by Buyer.
An updated Schedule 3.4 listing all of the contracts remaining after any such
exclusions (such contracts collectively referred to herein as the "Assumed
Contracts") shall be delivered by Seller to Buyer at the Closing.  Any contract
not assumed by Buyer shall be deemed to have been retained by Seller and Buyer
shall not be liable in any way with respect to any such non-assumed contracts.


                                   ARTICLE IV

                                    CLOSING

         4.1     Closing.  The closing of the transactions contemplated by this
Agreement ("the Closing") and the closing of the transactions contemplated by
the Branch Purchase and Assumption Agreement between Buyer and Seller shall
take place simultaneously in the offices of the Buyer, at 1901 Harrison Street,
Oakland, California on July 30, 1993, provided that such date shall be extended
to a date on or before December 31, 1993 if (i)one or more of the conditions
set forth in Article IX has not been satisfied or waived on or before such date
and Seller or Buyer, as applicable, has diligently and in good faith attempted
to satisfy such condition or conditions or (ii) it is reasonably necessary for
Buyer to complete or facilitate the conversion of Seller's records to Buyer's
data processing system or (iii) the time for closing the transactions
contemplated by the Branch Purchase and Assumption Agreement has been extended.
The date the Closing is to be held is referred to herein as the "Closing Date."

         4.2     Payment Due At Closing.  The amount owed Seller by Buyer
pursuant to Section 2.4 will be deducted from the amount owed Buyer by Seller
pursuant to Section 2.5 and netted with the amount due the appropriate party
under Section 2.6 to determine the amount due Buyer from Seller as of the
Closing (the "Cash Payment").  The Cash Payment shall be determined based on a
preliminary. settlement statement substantially in the form attached hereto as
Exhibit 2, to be delivered by the Seller to Buyer at the Closing (the
"Preliminary Settlement Statement").  The Seller shall pay to Buyer by wire
transfer of immediately available funds the Cash Payment so determined.
<PAGE>   14
                                       10

         4.3     Post-Closing Adjustments.  Following the Closing Date and
after the final data necessary to prepare a definitive settlement sheet have
been accumulated (including, without limitation, final schedules 1.1, 2.6, 3.1,
3.2, and 3.3 prepared as of the close of business on the Closing Date), Buyer
and Seller shall hold a post closing (the "Post-Closing") for purposes of
conducting an adjusting settlement using such final data.  The difference
between the Cash Payment and the final settlement amount (the "Final Payment")
shall be transferred, together with accrued interest thereon from the Closing
Date at the Federal Funds rate in effect on the Closing Date, to Seller from
Buyer or to Buyer from Seller, as the case may be.  In addition, the prorations
contemplated under Section 2.6 that cannot be reasonably calculated at the
Closing shall be settled at the Post-Closing.  The Post-Closing will be held
within fifteen (15) business days after the Closing Date or as mutually agreed
upon by Buyer and Seller.

         4.4     Disputes as to Calculations.  Buyer and Seller agree to use
their best effort to agree on the calculation of the Cash Payment and the Final
Payment.  In the event that the parties should fail to agree on either
calculation, the parties agree to refer the matters in dispute with respect to
such calculations to an independent firm of certified public accountants of
national standing reasonably acceptable to Buyer and Seller.  Buyer and Seller
agree to be bound by the determination of such firm with respect to the
disputed matter relating to the calculation of the Cash Payment or the Final
Payment.  Buyer and Seller agree to share equally the fees and charges of such
accounting firm for its services in resolving such dispute.  If in the
resolution of the dispute, it is determined that one party owes an amount to
the other party, the paying party shall also pay interest on such amount at the
Federal Funds Rate from the date such amount should have been paid to the date
of payment.

         4.5     Deliveries by Seller.  At or prior to the Closing, Seller
shall deliver to Buyer the documents set forth in Section 9.2(k).

         4.6     Deliveries by Buyer.  At or prior to the Closing, Buyer shall
deliver to Seller the documents set forth in Section 9.l(h).


                                   ARTICLE V

                    REPRESENTATIONS AND WARRANTIES OF BUYER

         Buyer represents and warrants to Seller as follows:

         5.1     Organization and Authority.  Buyer is a savings and loan
association duly organized and validly existing under the laws of the United
States, with corporate power and authority to carry on its business as now
being conducted and to own and operate the properties which it now owns and
operates.  The execution, delivery and performance by Buyer of this Agreement
are within Buyer's corporate power, have been duly authorized
<PAGE>   15
                                       11

by all necessary corporate action on the part of Buyer and do not contravene or
constitute a default under any provision of applicable law or regulation or of
the charter or by-laws of the Buyer or any judgment, injunction, order, decree,
material agreement or material instrument binding upon Buyer.  This Agreement
is a valid and binding obligation of Buyer except as may be limited by
bankruptcy, insolvency, moratorium, receivership, conservatorship,
reorganization or similar laws affecting the fights of parties dealing with
federally chartered savings and loan associations generally.

         5.2     Litigation.  There is no action, suit or proceeding pending
against Buyer, or to the Knowledge of Buyer threatened against or affecting
Buyer, before any court or arbitrator or any governmental body, agency or
official which would have a material adverse effect upon the ability of Buyer
to perform its obligations under this Agreement or which in any manner
questions .the validity of this Agreement.

         5.3     Governmental Notices.  Buyer has received no notice from any
federal or other governmental agency indicating that such agency would oppose
or not grant or issue its consent or approval, if required, with respect to the
transactions contemplated hereby or would qualify or condition its consent or
approval in a manner which would adversely affect the economic bargain
reflected herein.  Buyer has no Knowledge of any facts peculiar to Buyer,
including but not limited to any failure to comply with applicable law, which
could reasonably be expected to form the basis for denial of regulatory
approval of the transactions contemplated by this Agreement, and Buyer agrees
to notify Seller promptly upon acquiring Knowledge of any such facts.


                                   ARTICLE VI

                    REPRESENTATIONS AND WARRANTIES OF SELLER

         Seller represents and warrants to Buyer as follows:

         6.1     Organization and Authority.  Seller is a savings bank duly
organized and validly existing under the laws of the United States with
corporate power and authority to carry on its business as now being conducted
and to own and operate the properties which it now owns and operates.  The
execution, delivery and performance by Seller of this Agreement is within its
corporate powers, has been duly authorized by all necessary corporate action on
its part and does not contravene or constitute a default under any provision of
applicable law or regulation or of the charter or by-laws of Seller or any
judgment, injunction, order, decree, material agreement or material instrument
binding upon Seller or to which any of the Assets are subject or result in the
creation or imposition of any lien or encumbrance on such Assets.  This
Agreement is a valid and binding obligation of Seller except as may be limited
by bankruptcy, insolvency, moratorium, receivership, conservatorship,
reorganization or similar laws affecting the fights of parties dealing with
federally chartered savings and loan associations generally.
<PAGE>   16
                                       12

         6.2     Litigation.  There is no action, suit or proceeding pending
against Seller or to the Knowledge of Seller threatened against or affecting
Seller, before any court or arbitrator or any governmental body, agency or
official which would have a material adverse effect upon the ability of Seller
to perform its obligations under this Agreement or which in any manner
questions the validity of this Agreement, or which would have a material
adverse effect upon the aggregate value of the Deposits or Assets or the
operation of the Branch Offices.

         6.3     Governmental Notices.  Seller has received no notice from any
federal or other governmental agency indicating that such agency would oppose
or not grant or issue its consent or approval, if required, with respect to the
transactions contemplated hereby, or would qualify or condition its consent or
approval in a manner which would adversely affect the economic bargain
reflected herein.  Seller has no Knowledge of any facts peculiar to Seller,
including but not limited to any failure to comply with applicable law, which
could reasonably be expected to form the basis for denial of regulatory
approval of the transactions contemplated by this Agreement, and Seller agrees
to notify Buyer promptly upon acquiring Knowledge of any such facts.

         6.4     Compliance with Law.  Seller holds all licenses, franchises,
permits and authorizations necessary for the lawful conduct of its business at
the Branch Offices, and has not violated, and is not in violation of, any
applicable statute, law, ordinance, rule or regulation of any Federal, state,
local or foreign governmental body, agency or subdivision having, asserting or
claiming jurisdiction over it or over any part of its operations at the Branch
Offices.  The deposits domiciled at the Branch Offices are insured by the FDIC
up to the current applicable maximum limits.  With reference to the Interest
and Dividend Tax Compliance Act of 1983 and the regulations promulgated by the
Internal Revenue Service thereunder, Seller (i) has exercised due diligence, as
defined in such regulations, for all accounts opened prior to January 1, 1984;
(ii) has exercised due diligence, as defined in such regulations, for the
deposits domiciled at the Branch Offices opened on or after January 1, 1984 but
prior to January 1, 1990 and, for all such deposits, has either obtained a
certified taxpayer identification number of the accountholder or obtained an
"awaiting-TIN" certification from the accountholder and is performing back-up
withholding on any account having an "awaiting-TIN" certification for which a
certified taxpayer identification number was not subsequently obtained; (iii)
has exercised due diligence, as defined in such regulations, for the deposits
domiciled at the Branch Offices opened after January 1, 1990, and for such
deposits has obtained a certified taxpayer identification number of the
accountholder at the time the account was opened; and (iv) will deliver all
such certification forms to Buyer at the Closing.

         6.5     Title to Assets.  Seller is the lawful owner of and has good
and marketable title to the Assets, free and clear of all Encumbrances, except
as disclosed on Schedule 3.1.  Delivery to Buyer of the instruments of transfer
of ownership contemplated by this Agreement will vest good and marketable title
to those Assets in Buyer, free and clear of all Encumbrances, except as
disclosed on Schedule 3.1.
<PAGE>   17
                                       13

         6.6     Deposits.  The total Deposits as of the date of this Agreement
were approximately $364 million.  All of the Deposits were, and will be at the
Closing Date, issued in compliance with all applicable laws, orders and
regulations.

         6.7     Insurance.  All of the assets and properties of Seller at the
Branch Offices are covered by insurance in amounts at least equal to their
respective fair market values and insurance against such losses as are
generally insured against by comparable businesses.  In addition, the Branch
Offices are insured against casualties and such other events as are included in
extended coverage fire and casualty policies.  All amounts due and payable
under such insurance policies are fully paid, and all such insurance policies
are in full force and effect.

         6.8     Taxes.  For all periods up to and including the Closing Date,
Seller has paid in full all taxes (including any additions to tax, penalties
and interest), withholding and other governmental charges imposed by the United
States or by any state, municipality, subdivision or instrumentality of the
United States or by any other taxing authority, that have or will become due
and payable prior to the Closing.

         6.9     Financial Information.  Seller's 1992 Audited Annual Report
has been prepared in accordance with generally accepted accounting principles
consistently applied. All schedules to be delivered by Seller to Buyer pursuant
to this Agreement shall be true, complete and accurate in all material
respects.

         6.10    Information for Regulatory Approvals.  The information
furnished or to be furnished by Seller to Buyer pursuant to Section 8.4 of this
Agreement for the purpose of enabling Buyer to complete and file an application
with the OTS will be true and complete as of the date so furnished.

         6.11    Operation.  To the Knowledge of Seller, the improvements at
each of the Branch Offices and the current use and operation thereof are in
compliance with and authorized by applicable zoning and other land use
regulations, including without limitation building, fire, health, safety,
hazardous waste and environmental codes and all private covenants, restrictions
and easements.  There are no facts or circumstances existing or, to the
Knowledge of Seller, threatened which could have a material adverse effect on
the present or future use of any of the Branch Offices as a banking office as
currently operated by Seller.  Seller has neither received notice nor has
Knowledge that any governmental authority nor any employee or agent thereof
considers any of the Branch Offices to violate or to have violated any fire,
zoning, health, building, hazardous waste or environmental code or other
ordinance, law or regulation or order of any government or any agency, body or
subdivision thereof, and no such violations exist.

         6.12    Condemnation.  Seller has no notice of any pending nor
Knowledge of any threatened proceeding, in eminent domain or otherwise, which
would affect the Branch Offices, or any portion thereof, nor does Seller know
of any facts which might give rise to
<PAGE>   18
                                       14

such action or proceeding.  Seller has no Knowledge of any existing, proposed
or contemplated plan to widen, modify or realign any street or highway
contiguous to any Branch Office.  To the Knowledge of Seller, there are no
intended public improvements which will result in any charge being levied or
assessed against, or in the creation of any lien upon, the Branch Offices.

         6.13    Account Loans.  Each Account Loan is a legal valid and binding
obligation of the borrower thereof, enforceable in accordance with its terms,
except as such enforceability may be subject to or limited by bankruptcy,
insolvency, reorganization, moratorium, or other similar laws relating to or
affecting the rights of creditors generally. Seller owns each Account Loan free
and clear of all liens, claims and encumbrances.  The Account Loans and the
origination and administration of such loans comply with all applicable federal
and state laws and regulations, including, but not limited to, Regulation E,
Regulation B, usury laws and truth in lending laws.

         6.14    Employees.

                 (a)      Schedule. Within ten (10) business days after the
date of this Agreement, Seller shall deliver to Buyer a true and complete list
of each Company Employee Plan and each Employee Agreement (referred to herein
as Schedule 6.14(a)). Except as disclosed on this Schedule 6.14(a), neither the
Seller nor any ERISA Affiliate has any plan or commitment, whether legally
binding or not, to establish any new Company Employee Plan or Employee
Agreement, to modify any Company Employee Plan or Employee Agreement (except to
the extent required by law or to conform any such Company Employee Plan or
Employee Agreement to the requirements of any applicable law, in each case as
previously disclosed to Buyer), or to enter into any Company Employee Plan or
Employee Agreement, nor has any intention to do any of the foregoing been
communicated to Employees.

                 (b)      Documents.  The Seller has provided or will provide
within ten (10) business days from the date of this Agreement to Buyer (i)
current, accurate and complete copies of all documents embodying or relating to
each Company Employee Plan and each Employee Agreement, including all
amendments thereto and written interpretations thereof; (ii) the most recent
summary plan description together with the most recent summary of material
modifications, if any, required under ERISA with respect to each Company
Employee Plan; and (iii) all material communications to any Employee or
Employees relating to each Company Employee Plan and any proposed Company
Employee Plans.

                 (c)      Employee Plan Compliance. (i) The Seller and each
ERISA Affiliate has performed in all material respects all obligations required
to be performed by them under each Company Employee Plan and each Company
Employee Plan has been established and maintained in all material respects in
accordance with its terms and in compliance with all applicable laws, statutes,
orders, rules and regulations, including but not
<PAGE>   19
                                       15

limited to ERISA and the Code; (ii) each Company Employee Plan intended to
qualify under Section 401 of the Code is, and since its inception has been, so
qualified and a determination letter has been issued by the IRS to the effect
that each such Company Employee Plan is so qualified and that each trust
forming a part of any such Company Employee Plan is exempt from tax pursuant to
Section 501(a) of the Code and no circumstances exist which would adversely
affect this qualification or exemption; (iii) no "prohibited transaction,"
within the meaning of Section 4975 of the Code or Section 406 of ERISA, has
occurred with respect to any Company Employee Plan; (iv) no action or failure
to act and no transaction or holding of any asset by, or with respect to, any
Company Employee Plan has or may subject the Seller, any ERISA Affiliate or any
fiduciary to any material tax, penalty, liability or other disability, whether
by way of indemnity or otherwise; and (v) there are no actions, proceedings,
suits or claims pending, or to the Knowledge of the Seller, threatened or
anticipated (other than routine claims for benefits) against the Seller or any
ERISA Affiliate with respect to any Company Employee Plan, or against any
Company Employee Plan or against the assets of any Company Employee Plan.

                 (d)      Pension Plans. (1) With respect to each Pension Plan,
(i) no steps have been taken to terminate any Pension Plan (other than the
Southwest Gas Management Incentive Plan) now maintained or contributed to by
the Seller or any ERISA Affiliate, no termination of any Pension Plan has
occurred pursuant to which all liabilities have not been satisfied in full, no
liability under Title IV of ERISA has been incurred by the Seller or any ERISA
Affiliate which has not been satisfied in full, and no event has occurred and
no condition exists that could reasonably be expected to result in the Seller
or any ERISA Affiliate incurring a liability under Title IV or could constitute
grounds for terminating any Pension Plan; (ii) no proceeding has been initiated
by the PBGC to terminate any Pension Plan or to appoint a trustee to administer
any Pension Plan; (iii) each Pension Plan which is subject to Part 3 of
Subtitle B of Title I of ERISA or Section 412 of the Code, has been maintained
in compliance with the minimum funding standards of ERISA and the Code and no
such Pension Plan has incurred any "accumulated funding deficiency," as defined
in Section 412 of the Code and Section 302 of ERISA, whether or not waived;
(iv) neither the Seller nor any ERISA Affiliate has sought or received a waiver
of its funding requirements with respect to any Pension Plan and all
contributions payable with respect to each Pension Plan have been timely made;
and (v) no reportable event, within the meaning of Section 4043 of ERISA, and
no event described in Section 4062 or 4063 of ERISA, has occurred with respect
to any Pension Plan.

                          (2)     At no time since January 1, 1980 has the
Seller or any ERISA Affiliate contributed to or been required to contribute to,
or incurred any withdrawal liability (within the meaning of Section 4201 of
ERISA) to any Multiemployer Plan which liability has not been fully paid as of
the date hereof.

                 (e)      Effect of Transaction.  Except as set forth in
Schedule 15.14(e), the execution of, and performance of the transactions
contemplated in, this Agreement will not (either alone or upon the occurrence
of any additional or subsequent events) constitute
<PAGE>   20
                                       16

an event under any Company Employee Plan, Employee Agreement, trust or loan
that will or may result in any payment (whether of severance pay or otherwise),
acceleration, forgiveness of indebtedness, vesting, distribution, .increase in
benefits or obligation to fund benefits with respect to any Employee.

                 (f)      Employment Matters.  The Seller and each of its
subsidiaries (i) is in compliance in all material respects with all applicable
federal, state and local laws, rules and regulations (domestic and foreign)
respecting employment, employment practices, terms and conditions of employment
and wages and hours, in each case, with respect to Employees; (ii) has withheld
all amounts required by law or by agreement to be withheld from the wages,
salaries and other payments to Employees; (iii) is not liable for any arrears
of wages or any taxes or any penalty for failure to comply with any of the
foregoing; and (iv) other than routine payments to be made in the normal course
of business and consistent with past practices, is not liable for any payment
to any trust or other fund or to any governmental or administrative authority,
with respect to unemployment compensation benefits, social security or other
benefits for Employees.

                 (g)      Labor.  (1) No work stoppage or labor strike against
the Seller or any of its subsidiaries is pending or threatened by the Employees
or with respect to the Branch Offices.  Except as set forth on Schedule
6.14(g), neither the Seller nor any of its subsidiaries is involved in, has
notice of, or, to Seller's Knowledge, is threatened with any labor dispute,
grievance, or litigation relating to labor, safety or discrimination matters
involving any Employee, including, without limitation, violation of any
federal, state or local labor or employment laws (domestic or foreign), charges
of unfair labor practices or discrimination complaints, which, if adversely
determined, would, individually or in the aggregate, result in material
liability to the Seller or any of its subsidiaries.  Neither the Seller nor any
of its subsidiaries has engaged in any unfair labor practices within the
meaning of the National Labor Relations Act or the Railway Labor Act which
would, individually or in the aggregate, directly or indirectly result in
material liability to the Seller or any of its subsidiaries.

                          (2)     Except as set forth on Schedule 6.14(g),
neither the Seller nor any of its subsidiaries is presently, or has been in the
past a party to, or bound by, any collective bargaining agreement or union
contract with respect to Employees and no collective bargaining agreement is
being negotiated by the Seller or any of its subsidiaries with respect to the
Employees.


                                  ARTICLE VII

                               COVENANTS OF BUYER

         7.1     Regulatory Notices and Application.  After the date of this
Agreement, Buyer shall prepare and file, with the cooperation and assistance of
the Seller, all required
<PAGE>   21
                                       17

notices and applications for regulatory approval of the transactions
contemplated by this Agreement.  Buyer shall use its best efforts to obtain all
consents, approvals or authorizations of all governmental agencies required for
the consummation of the transactions contemplated hereby.

         7.2     Further Assurance.  On or after the Closing Date, Buyer shall
give such further assurances to Seller and upon Seller's request shall execute,
acknowledge and deliver all such acknowledgements and other instruments and
take such further action as may be necessary or appropriate to effectively
relieve and discharge Seller from any obligations assumed by Buyer under this
Agreement; provided, however, that Buyer need not incur any material costs or
expenses in connection with the undertakings contained in this Section unless
such costs or expenses are agreed to be reimbursed by Seller.

         7.3     Performance of Liabilities.  After the Closing Date, Buyer
agrees (i) to pay, subject to Seller's compliance with Section 8.11 hereof, to
the extent of sufficient available funds on deposit, all properly drawn checks,
drafts and non-negotiable withdrawal orders timely presented by mail, over its
counters or through clearings by depositors whose deposits or accounts on which
such items are drawn are subject to sale pursuant to this Agreement, whether
drawn on the check or draft form provided by Seller or on those provided by
Buyer, and (ii) to remit to Seller promptly all payments relating to loans not
purchased by Buyer under this Agreement; provided, however, that Buyer shall
have no liability to Seller for the failure of the Seller to receive any such
remittance.


                                  ARTICLE VIII

                              COVENANTS OF SELLER

         8.1     Access to Records and Information: Personnel: Customers:
Employees.

                 (a)      Between the date of this Agreement and the Closing
Date, Seller shall afford to Buyer and its authorized agents and
representatives full access upon reasonable notices, during normal business
hours, to the properties, operations, books, records, contracts, documents,
loan files and other information of or relating to the Branch Offices.  Seller
shall cause its personnel to provide assistance to Buyer in Buyer's
investigation of matters relating to the Branch Offices; provided, however,
that Buyer's investigation shall be conducted in a manner which does not
unreasonably interfere with Seller's normal operations, customers and employee
relations.

                 (b)      Between the date of this Agreement and the Closing
Date, Seller will use its best efforts to maintain good relations with
employees employed at the Branch Offices.  Buyer may communicate with employees
at the Branch Offices With Seller's consent, which consent shall not be
unreasonably withheld, and at Buyer's expense may conduct training sessions for
such employees at such offices, or elsewhere, provided that
<PAGE>   22
                                       18

such training sessions do not unreasonably interfere with operations at such
offices.

                 (c)      Within ten (10) days following the date of this
Agreement, Seller will provide Buyer with records and information relating to
the operation of the Branch Offices that Buyer deems reasonably necessary for
the purpose of converting such information to Buyer's data processing systems
(referred to herein as Schedule

         8.2     Conduct of Business Pending Closing.  Between the date hereof
and the Closing Date, Seller shall conduct its operations related to the Branch
Offices in the ordinary course of business and shall not take any action that
would adversely affect the assets or the liabilities to be acquired or assumed
hereunder.  Without limiting the foregoing, Seller shall not, without the prior
written consent of Buyer:

                 (a)      offer rates or terms on accounts at the Branch
Offices that are inconsistent with Seller's practices during calendar year
1993, as reflected by the historical relationship between the rates offered by
the Seller and U.S. Treasury rates for similar product maturities;

                 (b)      cause any Branch Offices to transfer to or obtain
from Seller's other operations or branches any Assets;

                 (c)      cause any Branch Office to transfer to Seller's other
operations any deposits, except upon the unsolicited request of a depositor;
provided that Seller may contact depositors whose primary or seasonal address
is in Nevada and who have no primary or seasonal address in Arizona to solicit
the transfer of such accounts to one of Seller's Nevada branches;

                 (d)      create or suffer to exist any new Encumbrance on the
Assets, or otherwise enter into any material transaction or otherwise make any
material commitments relating to the Assets;

                 (e)      increase or agree to increase the salary,
remuneration or compensation of persons employed at the Branch Offices other
than in accordance with Seller's customary policies; or

                 (f)      open or establish any new deposit accounts, loan
products or services that are not currently offered by Buyer, including, but
not limited to, issuing any new ATM, guarantee or debit cards, opening any new
commercial checking or collection accounts, or selling any securities products
at its Branch Offices.

         8.3     New Employees.  Seller shall consult with Buyer prior to
hiring any new employees at the Branch Offices or transferring employees to or
from the Branch Offices and Seller's other operations.
<PAGE>   23
                                       19

         8.4     Regulatory Approvals.  Seller shall use its best efforts to
assist Buyer in obtaining all regulatory approvals necessary to complete the
transactions contemplated hereby, and Seller will provide to Buyer or to the
appropriate regulatory authorities all information reasonably required to be
submitted by Seller in connection with such approvals.

         8.5     Contents: Compliance With Law.  Seller shall obtain all
consents and releases of third parties necessary to consummate the transactions
contemplated by this Agreement, and shall comply with all applicable laws,
regulations and rulings in connection with this Agreement and the consummation
of the transactions contemplated hereby.

         8.6     Repair or Substitution of Fixed Assets.  Seller will repair,
replace or refund the purchase price of any Fixed Asset with a Net Book Value
as of the Closing Date in excess of $1000 which Buyer notifies Seller is
malfunctioning within ten (10) business days after the Closing Date to the
extent that the malfunction is not the result of abuse or neglect by Buyer.
Seller shall have twenty (20) business days after notification by Buyer to
repair such Assets, replace them with assets of comparable quality and use, or
refund the purchase price of such Fixed Assets to Buyer.

         8.7     Removal of Property.

                 (a)      Seller shall remove, at its own expense, all property
not included on Schedule 3.1, and, after consultation with Buyer, shall restore
all walls, fixtures and appurtenances of the Branch Offices to which such
property is attached or affixed to their condition prior to the attachment or
affixing of such property, normal wear and tear excepted.  All such property
will be removed at a convenient time to be mutually agreed upon by the parties.

                 (b)      Seller will void as of the close of business on the
day prior to the Closing Date all ATM access cards, check guarantee cards and
debit cards issued by it to customers of the Branch Offices and will cooperate
with Buyer in notifying the customers in writing at least fifteen (15) days
prior to the Closing Date of such cancellation of cards.

                 (c)      Seller shall remove, as of the dose of business on
the Closing Date, any supply of negotiable instruments stock, including,
without limitation, all money orders and traveler's checks, located at the
Branch Offices on the Closing Date.

         8.8     Insurance Policies.  Seller will maintain in effect until the
Closing the insurance referred to in Section 6.7.

         8.9     Furnishing Information.  Seller shall provide all information,
financial statements and documentation as Buyer shall reasonably request in
connection with the transactions contemplated by this Agreement; provided that
Seller shall not be obligated to disclose confidential or proprietary
information not related to the Branch Offices.
<PAGE>   24
                                       20

         8.10    Operation of Branch Offices. From and after the date of this
Agreement until the Closing Date, Seller shall operate and manage the Branch
Offices in accordance with all applicable federal, state and local laws,
ordinances and requirements and maintain the Branch Offices in .good order,
condition and repair.  Seller shall punctually pay and perform all of its
obligations under service and maintenance contracts, and pay before delinquency
all taxes, assessments, utility charges and other expenses affecting the Branch
Offices.

         8.11    Further Assurances.  On or after the Closing Date, Seller
shall (i) give such further assistance to Buyer and upon Buyer's request shall
execute, acknowledge and deliver all such bills of sale, deeds,
acknowledgements and other instruments and take such further action as may be
necessary or appropriate effectively to vest in Buyer full, legal and equitable
tire to the Assets, and (ii) use its best efforts to assist Buyer in the
orderly transition of the operations being acquired by Buyer.  In particular,
and without limiting the foregoing:

                 (a)      Seller will remit to Buyer promptly after receipt by
Seller after the Closing Date at any of its other offices all payments relating
to Account Loans or mounts intended for deposit to the accounts which are part
of the Deposits; and

                 (b)      With respect to checks or drafts drawn against
accounts which are Deposits, Seller will cooperate with Buyer and take all
reasonable steps requested by Buyer to ensure that, after the Closing Date,
each such item which is coded for presentment to Seller or to any bank for the
account of Seller is delivered to Buyer in a timely manner and in accordance
with applicable law and clearing house rule or agreement.


                                   ARTICLE IX

                             CONDITIONS TO CLOSING

         9.1     Conditions to the Obligations of Seller.  Unless waived in
writing by Seller, the obligations of Seller to consummate the transactions
contemplated by this Agreement are subject to the satisfaction at or prior to
the Closing of the following conditions:

                 (a)      Performance. Each of the material acts and
undertakings of Buyer to be performed at or before the Closing (including the
covenants contained herein) pursuant to this Agreement shall have been duly
performed in all material respects.

                 (b)      Representations and Warranties.  The representations
and warranties of Buyer contained in article V of this Agreement shall be true
and correct in all material respects on and as of the Closing Date with the
same effect as though made on and as of the Closing Date.
<PAGE>   25
                                       21

                 (c)      Regulatory Approvals.  All licenses, approvals and
consents of any relevant state, federal or other regulatory agencies required
for the consummation of the transactions contemplated hereby shall have been
obtained, all applicable waiting periods shall have expired, and all necessary
conditions of those licenses, approvals and consents shall have been fully
satisfied; provided, however, that if any licenses, approvals or consents are
qualified or conditioned in any manner which materially and adversely affects
the economic bargain reflected herein, this condition may be deemed
unfulfilled.

                 (d)      Absence of Proceedings and Litigation.  The
consummation of the transactions contemplated by the Agreement shall not be
precluded by any order, injunction, decree or ruling of a court of competent
jurisdiction or any governmental entity, and there shall not have been any
action taken or any statute, rule, or regulation enacted or promulgated by any
governmental entity which would prevent or otherwise make unlawful the
consummation of the transactions contemplated by the Agreement.

                 (e)      Non-Competition Agreement.  Buyer shall have executed
the Non-Competition Agreement between Buyer, Seller and Southwest Gas
Corporation, and payment thereunder shall be made at Closing.

                 (f)      Consulting Agreement.  Buyer shall have executed the
Consulting Agreement between Buyer and Seller, and payment thereunder shall be
made at Closing.

                 (g)      Branch Purchase and Assumption Agreement.  Buyer
shall have executed the Branch Purchase and Assumption Agreement between Buyer
and Seller, and the transactions contemplated therein shall close concurrently
herewith.

                 (h)      Documents.  Seller shall receive the following
documents from Buyer at the Closing:

                          (1)     An executed Assumption Agreement
substantially in the form of Exhibit 3 hereto.

                          (2)     A certificate signed by a duly authorized
officer of Buyer stating that the conditions set forth in Sections 9.1(a), (b),
(c), (d), (e), (f) and (g) have been fulfilled.

                          (3)     A certificate of the Secretary or Assistant
Secretary of Buyer as to the incumbency and signatures of officers.

                          (4)     The items required to be delivered pursuant
to Section 10.2(b) of the Branch Purchase and Assumption Agreement.
<PAGE>   26
                                       22

         9.2     Conditions to the Obligations of Buyer.  Unless waived in
writing by Buyer, the obligations of Buyer to consummate the transactions
contemplated by this Agreement are subject to the satisfaction at or prior to
the Closing of the following conditions:

                 (a)      Performance.  Each of the material acts and
undertakings of Seller to be performed at or before the Closing (including the
covenants contained herein) pursuant to this Agreement shall have been duly
performed in all material respects.

                 (b)      Representations and Warranties.  The representations
and warranties of Seller contained in Article VI of this Agreement shall be
true and correct in all material respects on and as of the Closing Date with
the same effect as though made on and as of the Closing Date.

                 (c)      Regulatory Approvals.  All licenses, approvals and
consents of any relevant state, federal or other regulatory agencies required
for the consummation of the transactions contemplated hereby shall have been
obtained, all applicable waiting periods shall have expired and all necessary
conditions of those licenses, approvals and consents shall have been fully
satisfied; provided, however, that if any such license, approvals or consents
are qualified or conditioned in any manner which materially and adversely
affects the economic bargain reflected herein, this condition may be deemed
unfulfilled.

                 (d)       Absence of Proceedings and Litigation.  The
consummation of the transactions contemplated by the Agreement shall not be
precluded by any order, injunction, decree or ruling of a court of competent
jurisdiction or any governmental entity, and there shall not have been any
action taken or any statute, rule, or regulation enacted or promulgated, by any
governmental entity which would prevent or otherwise make unlawful the
consummation of the transactions contemplated by the Agreement.

                 (e)      Non-Competition Agreement.  Seller and Southwest Gas
shall have executed the Non-Competition Agreement, and payment thereunder shall
be made at Closing.

                 (f)      Consulting Agreement.  Seller shall have executed the
Consulting Agreement, and payment thereunder shall be made at Closing.

                 (g)      Branch Purchase and Assumption Agreement.  Seller
shall have executed the Branch Purchase and Assumption Agreement and the
transactions contemplated therein shall close concurrently herewith.

                 (h)      No Material Adverse Change.  No material adverse
change since the date of this Agreement shall have occurred affecting the
Branch Offices, the Assets or the Deposits or the ability to conduct banking
operations at the Branch Offices.
<PAGE>   27
                                       23

                 (i)      Consents of Third Parties.  Seller shall have
obtained all consents and authorizations of third parties, in form and
substance satisfactory to Buyer, necessary to consummate the transactions
contemplated by this Agreement without violation of any lease, contract, loan
or other agreement to which Seller is a party.

                 (j)      Opinion of Counsel.  Buyer shall have received an
opinion of counsel for Southwest Gas Corporation, satisfactory to Buyer, to the
effect that no notice or application need be filed with any public utilities
commission or utility regulatory authority in order to consummate the
transactions contemplated by this Agreement.

                 (k)      Closing Documents.  Buyer shall receive the following
documents from Seller at the Closing:

                          (1)     A certificate signed by duly authorized
officer of Seller stating that the conditions set forth in Sections 9.2(a),
Co), (c), (d), (e), (f), (g), (h), (i) and (j) have been satisfied;

                          (2)     Certificates from the Secretaries or
Assistant Secretaries of Seller as to the incumbency and signatures of
officers;

                          (3)     Schedules 1.1 and 2.6 and updated Schedules
3.1, 3.2, 3.3 and 3.4;

                          (4)     The Preliminary Settlement Statement and any
exhibits thereto;

                          (5)     An executed Bill of Sale and Assignment
substantially in the form attached as Exhibit 4;

                          (6)     An executed Assumption Agreement
substantially in the form attached as Exhibit 3;

                          (7)     An affidavit of non-foreign status as
required by Section 1445(b)(2) of the Code; and

                          (8)     The items required to be delivered pursuant
to Section 10.2(a) of the Branch Purchase and Assumption Agreement.
<PAGE>   28
                                       24

                                   ARTICLE X

                                  TERMINATION


         10.1    Events of Termination.  This Agreement shall be terminable
and, if so terminated, be of no further force or effect between the parties
hereto, except as to any liability for breach of any duty, representation,
warranty or obligation arising prior to the date of termination, upon the
occurrence of any of the following events:

                 (a)      By mutual written consent of Seller and Buyer;

                 (b)      By Seller, if any of the conditions set forth in
Article 9.1 have not been met by December' 31, 1993, unless the failure to meet
such conditions does not constitute a material breach by Buyer of this
Agreement;

                 (c)      By Buyer, if any of the conditions set forth in
Article 9.2 have not been met by December 31, 1993, unless the failure to meet
such conditions does not constitute a material breach by Seller of this
Agreement;

                 (d)      By Buyer, if it discovers information or conditions
that axe, individually or in the aggregate, materially and adversely different
from the information and conditions contained in this Agreement, including the
information contained in the original and updated Schedules hereto;

                 (e)      By Buyer, if there is a material adverse change, in
the reasonable judgment of the Buyer, in the condition or value of the Branch
Offices or in the amount of, or other characteristics associated with, the
Deposits;

                 (f)      By either party, if a representation or warranty of
the other party is or becomes false or inaccurate or if the other party fails
to comply with a covenant in a timely manner, provided that such breach is
material to the value or condition of the Branch Offices or such breach has a
material impact on the other party's ability to consummate the transactions
contemplated hereby; or

                 (g)      By either party, if the OTS, or any other
governmental agency having jurisdiction over the transactions contemplated by
this Agreement notifies Seller or Buyer in writing that by its final
determination it will refuse to grant an approval or consent necessary to the
consummation of the transactions contemplated hereby.

         10.2    Manner of Termination.  Notwithstanding anything to the
contrary contained herein, neither party hereto shall have the right to
terminate this Agreement on account of its own breach or any immaterial breach
by the other party.  If a party desires to terminate this Agreement pursuant to
any right under this Article X, such termination
<PAGE>   29
                                       25

shall be ineffective unless communicated in writing to the other party.


                                   ARTICLE XI

                                   EMPLOYEES

         11.1    Employees.

                 (a)      Immediately upon the execution of this Agreement,
Buyer may conduct employment interviews in the Branch Offices, or elsewhere,
with each of those Employees which Buyer, in its sole discretion shall select;
provided, however, in no event shall Buyer have any obligation to hire any
Employee.  Seller shall deliver upon Buyer's request and upon receipt of
written consent and a release from the affected Employee, copies of the
personnel files for each Employee which the Buyer indicates it may desire to
hire.  Buyer will provide written notice to Seller not less than thirty (30)
days prior to Closing of the names of any Employee who will be offered
employment by the Buyer (referred to herein as Schedule 11.1).  Salary,
position and other terms of employment of any Employee hired, or proposed to be
hired, by Buyer shall be within the sole discretion of Buyer.  Buyer agrees to
conduct all interviews of Employees and to make all hiring decisions with
respect to Employees in a manner consistent with all applicable federal and
state laws, rules and regulations governing hiring and employment practices.

                 (b)      On or before the Closing Date, Seller will pay to
Employees (i) all salary earned through the Closing Date, (ii) all compensation
for vacation days and sick days (if payable) accrued but unused as of the
Closing Date, and (iii) all severance pay and other entitlement including any
entitlement under the WARN Act which may be owing to any Employee whose
employment by the Seller or any of its subsidiaries is terminated or is deemed
terminated on or before the Closing Date by reason of the transactions
contemplated hereby or otherwise.

         11.2    Employee Benefits.

                 (a)      Buyer is not assuming, nor shall Buyer have
responsibility for the continuation of, or for any liabilities under or in
connection with, any of the following:

                          (1)     any Company Employee Plan;

                          (2)     any Pension Plan; or

                          (3)     any liability with respect to Employees under
                                  the WARN Act.
<PAGE>   30
                                       26

                 (b)      Seller shall remain responsible for all liabilities
                          under or in connection with all of the following:

                          (1)     any Company Employee Plan;

                          (2)     any Pension Plan; and

                          (3)     any liability with respect to Employees under
                                  the WARN Act.

         Seller shall provide Buyer an opportunity to review and approve any
notice Seller determines to send to Employees under the WARN Act, including any
letter transmitting such notice.

                 (c)      Neither Buyer nor Seller intend this Article XI to
create any fights or interests, except as between Buyer and Seller, and no
Employee shall be treated as a third party beneficiary in or under this
Agreement.

         11.3    Indemnity.  Without limiting the generality of Section 13.2,
the Seller shall indemnify Buyer, its. affiliates, subsidiaries,.
shareholders, directors, officers, employees and agents, and each of the heirs,
executors, successors and assigns of the foregoing, and hold each of them
harmless from and against any Losses which may be incurred or suffered by any
of them (i) under the WARN Act arising out of, or relating to, any actions
taken by the Seller or any of its subsidiaries on or before the Closing Date;
(ii) in connection with any claim made by any Employee for any severance pay or
other compensation or benefit entitlement by reason of any Employee's
termination or deemed termination of employment by the Seller or any of its
subsidiaries as a result of the transaction contemplated hereby or otherwise;
(iii) in connection with any claim made by any Employee for any benefit
entitlement under any Company Employee Plan; (iv)arising out of or relating to
the funding, operation, administration, amendment or termination of any Pension
Plan, or the withdrawal or partial withdrawal from any Multiemployer Plan
whether arising out of or relating to any event or state of facts occurring or
existing before, on or after the Closing Date and including, but not' limited
to, Losses arising under Tire IV of ERISA, Section 302 of ERISA or Section 412
or 4971 of the Code; and (v) by reason of the failure by the Seller to comply
with any of the provisions of this Article XI.


                                  ARTICLE XII

                                OTHER AGREEMENTS

         12.1    Returned Items.  Any items that were credited for deposit to
an account at the Branch Offices prior to the Closing and are returned unpaid
on or within three (3) months after the Closing ("Returned Items") will be
handled as follows:
<PAGE>   31
                                       27

                 (a)      Seller will advise Buyer of Returned Items on the
date such Returned Items are received by Seller.

                 (b)      If Buyer's bank account is charged for the Returned
Item, Buyer will use its best efforts to obtain reimbursement from the account
to which, or from the party to whom, the Returned Item was credited.  If there
are sufficient funds in the account to which such Returned Item was credited or
any other accounts at any branch office of Buyer standing in the name of the
party liable for such Returned Item, Buyer 'will debit any or all of such
accounts an amount equal in the aggregate to the Returned Item.  If those
accounts do not contain funds sufficient to reimburse Buyer fully (for reasons
other than Buyer's breach of Section 12.2), Seller will, upon notice from
Buyer, immediately repay to Buyer the amount of the Returned Item and Buyer
will assign the Returned Item to Seller for collection.

                 (c)      If Seller's bank account is charged for the Returned
Item and if there are sufficient funds in the account to which such Returned
Item was credited or any other accounts on deposit at any branch office of
Buyer standing in the name of the party liable for such Returned Item, Buyer
will debit any or all of such accounts an amount equal in the aggregate to the
Returned Item and shall repay that amount to Seller.  If there are not
sufficient funds in the accounts (for reasons other than Buyer' s breach of
Section 12.2), Buyer will have no obligation to repay Seller unless and until
Buyer obtains reimbursement from the party liable for the Returned Item.

         12.2    Holds.  Holds that have been placed by Seller on particular
accounts or on individual checks, drafts, or other instruments will be
continued by Buyer under the same terms. Seller will deliver to Buyer at the
Closing a schedule of such holds (referred to herein as Schedule 12.2).

         12.3    Direct Deposits.  Seller will use reasonable efforts to
transfer all direct deposit arrangements and wire transfers tied to accounts at
the Branch Offices to Buyer as soon as practicable after the Closing.  At least
thirty (30) days prior to the Closing, Seller will deliver to Buyer a mass
change magnetic tape containing all direct deposit records in ACH format.  A
test tape will be delivered to Buyer by Seller at least two (2) weeks prior to
delivery of the final tape.  After the Closing, Seller will, on a daily basis
for the first (45) days and weekly thereafter, remit and transfer to Buyer all
direct deposits intended for accounts at the Branch Offices; provided, however,
that Seller's obligation to forward such deposits shall continue only for six
(6) months from the closing Date.  Thereafter, Seller will return all such
direct deposits to the paying party.  Immediately after such six (6) month
period, Seller will deliver to Buyer a magnetic tape of customers whose direct
deposits have not been transferred to Buyer.

         12.4    Backup Withholding.  Any amounts required by any governmental
agencies to be withheld from any of the Deposits (the "Withholding
Obligations") will be handled as follows:
<PAGE>   32
                                       28

                 (a)      Any Withholding Obligations required to be remitted
to the appropriate governmental agency prior to the Closing will be withheld
and remitted by Seller and any other sums withheld by Seller pursuant to
Withholding Obligations prior to the Closing shall also be remitted by Seller
to the appropriate governmental agency on or prior to the time they are due.

                 (b)      Any Withholding Obligations required to be remitted
to the appropriate governmental agency on or after the Closing and not withheld
by Seller as provided in clause (a) above will be remitted by Buyer.

         12.5    Checking Accounts.  Within thirty (30) days following the
Closing, Buyer will provide holders of accounts which may be accessed by checks
new checks MEEKER encoded with Buyer's identification number.  Seller will pass
through to Buyer checks received by it drawn on assumed accounts for a period
of ninety (90) days following Closing.  Buyer accepts full responsibility to
either pay the items or return them in accordance with the customer agreement
and the California Uniform Commercial Code. During the 90-day period, Seller
will give Buyer a daily accounting of debits to its clearing account. Buyer
shall immediately reimburse Seller by wire for such debits.

         For a period of ninety (90) days following the Closing, Seller will
out sort all Branch Office checks and prepare them to be couriered to the
Buyer's service center.  Buyer will arrange for all couriers necessary in
regard to the check processing activity during this period.  Buyer will settle
for gross dollar amount of outsorted branch checks by wire transfer on day two
(2) following delivery and will pay Seller interest on that amount for one (1)
business day at a rate equal to the Federal Funds Rate.  After the Closing,
Seller will prepare a tape of the in clearings for the Branch Offices and
transmit the tape and physical items nightly to Buyer's service center.

         12.6    IRA and Keogh Accounts.  Buyer will assume all IRA or Keogh
deposits at the Branch Offices (to the extent such deposits are not excluded
pursuant to Section 3.2) in accordance with and to the extent permitted by the
applicable IRA and Keogh documents and Seller and Buyer shall use their
respective reasonable efforts to facilitate such assumption.  Seller will
provide Buyer with the original trust documents for any IRA or Keogh deposits
assumed by Buyer under this Agreement.  Seller shall be responsible for all
federal and state income tax reporting of IRAs and Keogh Plan Accounts
("Keoghs") for the period of time prior to the Closing Date.  Buyer shall be
responsible for all federal and state income tax reporting of IRAs and Keoghs
from and after the Closing Date.  Seller agrees that it will collect no fees
for the transferred IRAs and Keoghs for 1993 without the prior written consent
of Buyer.  Seller and Buyer will cooperate with each other in effectuating the
transfer of IRA and Keogh accounts hereunder.

         12.7    Delivery of Records.  Prior to the Closing, Seller will
consult with the Buyer prior to delivery of the Records to the Buyer and, at or
following the Closing, shall deliver only those Records which the Buyer has
requested.  Seller shall retain those Records
<PAGE>   33
                                       29

not delivered to Buyer.  Following the Closing, subject to applicable law, each
party shall provide the other party reasonable access to the Records in its
possession.

         12.8    Interest Reporting.  Seller shall report through the Closing
Date and Buyer shall report from the Closing Date all interest credited to,
interest withheld from and early withdrawal penalties charged to the Deposits.
Said reports shall be made to the holders of these accounts and to the
appropriate federal and state regulatory or taxing authorities.

         12.9    Notices to Depositors.

                 (a)      Seller shall provide Buyer with a list of customer
information, in such format as Buyer shall reasonably request, as soon as
possible after the month-end prior to the scheduled Seller mailing referred to
in Section 12.9(b).  On the Closing Date, Seller shall provide Buyer a final
customer list of the assumed accounts.

                 (b)      No later than fifteen (15) days after receipt by
Buyer of a letter from the OTS stating the date of transactions contemplated by
this Agreement may be consummated and at least thirty (30) days before Closing,
Seller shall notify the holders of deposit accounts domiciled at the Branch
Offices of the pending acquisition.  The notification will be based on the list
referred to in the preceding paragraph and a log maintained at the subject
Branch Offices of the new accounts opened since the date of said list.  Seller
shall provide Buyer with a copy of said log up to the date of Seller's mailing.
Buyer shall send notification to the same holders setting out the details of
its administration of the assumed accounts.  Each party shall obtain the
approval of the other on its notification letter(s).

                 (c)      Buyer and Seller shall consult with each other as to
the contents of any notices required under 12 U.S.C. Section 1831r-1 and the
manner in which such notices shall be made.

         12.10   Card Processing and Overdraft Coverage.  Seller will provide
Buyer with a magnetic tape of ATM card holders no later than sixty (60) days
prior to the Closing Date in a format reasonably acceptable to Buyer.

         12.11   ABA Number.  Seller will use its reasonable efforts to
transfer its Arizona ABA routing transit number to Buyer on the Closing Date.

         12.12   Transition Assistance.  At Seller's request, Buyer will, to
the extent practicable, assist Seller in performing certain responsibilities
Seller may have under this Article XII after the Closing Date.  Seller shall
reimburse all reasonable costs and expenses incurred by Buyer in performing
such obligations promptly upon Buyer's request and shall indemnify, hold
harmless and defend Buyer from and against any and all losses arising out of
any actions, suits or other proceedings, claims or demands which relate to any
assistance
<PAGE>   34
                                       30

given by Buyer to Seller as contemplated by this Section 12.12.


                                  ARTICLE XIII

                               GENERAL PROVISIONS

         13.1    Survival.  The representations and warranties made by the
parties to this Agreement shall not expire with, or be terminated or
extinguished by, the Closing, but shall survive for a period of four (4) years
following the Closing.  The covenants and agreements set forth in this
Agreement shall survive the Closing and shall continue until all obligations
set forth herein shall have been performed or satisfied or they shall have been
in accordance with their terms.  Any fight of indemnification pursuant to
Section 13.2 with respect to a claimed breach of a representation or warranty
shall expire at the end of the four (4) year period referred to above unless on
or prior to the expiration of such period, a claim has been made to the party
from who indemnification is sought.

         13.2    Indemnification.

                 (a)      Seller shall indemnify, hold harmless and defend
Buyer from and against, and reimburse Buyer for, any and all damage, loss,
liability, cost, claim or expense (including reasonable attorneys' fees and
expenses, at trial and appellate levels, and costs of investigation incurred in
defending against and/or settling such damage, loss, liability, cost, claim or
expense, and any amount paid in settlement thereof) incurred or suffered by
Buyer in connection with (i) any material misrepresentation or breach of
warranty, covenant or agreement made or to be performed by Seller pursuant to
this Agreement, or (ii) any action taken or omitted to be taken by Seller or
any transaction or any event occurring on or prior to the Closing Date,
relating to Branch Office operations, the Assets or the Deposits, (iii) any
loss sustained by Buyer as the result of Seller's disclosure of business
records pertaining to the Branch Offices to third parties, or (iv) any employee
benefits described in Section 11.2, and any suits or proceedings commenced in
connection with any of the foregoing.

                 (b)      Buyer shall indemnify, hold harmless and defend
Seller from and against, and reimburse Seller for, any and all damage, loss,
liability, cost, claim or expense (including reasonable attorneys' fees and
expenses, at trial and appellate levels, and costs of investigation incurred in
defending against and/or settling such damage, loss, liability, cost, claim or
expense, and any amount paid in settlement thereof) incurred or suffered by
Seller in connection with (i) any material misrepresentation or breach of.
warranty, covenant or agreement made or to be performed by Buyer pursuant to
this Agreement, or (ii) any action taken or omitted to be taken by Buyer, or
any transaction or any event occurring after the Closing Date, relating to
Branch Office operations, the Assets or the Deposits, to the extent that such
operations, Assets or Deposits axe assumed by or transferred to Buyer.
<PAGE>   35
                                       31

                 (c)      A party seeking indemnification pursuant to this
Section 13.2 (an "indemnified party") shall give prompt notice to the party
from whom such indemnification is sought (the "indemnifying party") of the
assertion of any claim, or the commencement of any action or proceeding, in
respect of which indemnity. may be sought hereunder.  The indemnified party
shall assist the indemnifying party in the defense of any such action or
proceeding.  The indemnifying party shall have the right to, and shall at the
request of the indemnified party, assume the defense of any such action or
proceeding, at its own expense. In any such action or proceeding, the
indemnified party shall have the right to retain its own counsel, but the fees
and expenses of such counsel shall be at its own expense unless (i) the
indemnifying party and the indemnified party shall have mutually agreed to the
retention of such counsel or (ii)the named parties to any such suit, action or
proceeding (including any impleaded parties) include both the indemnifying
party and the indemnified party and, in the reasonable judgment of the
indemnified party, representation of both parties by the same counsel would be
inappropriate due to actual or potential differing interests between them.

                 (d)      An indemnifying party shall not be liable under this
Section 13.2 for any settlement effected without its consent of any claim,
litigation or proceeding in respect of which indemnity may be sought hereunder.
The indemnifying party may settle any claim without the consent of the
indemnified party, but only if the sole relief awarded is monetary damages that
are paid in full by the indemnifying party.  An indemnified party shall,
subject to its reasonable business needs, use reasonable efforts to minimize
the indemnification sought from the indemnifying party hereunder.
Notwithstanding the foregoing, no investigation by an indemnified party at or
prior to the Closing shall relieve an indemnifying party of any liability
hereunder.

         13.3    No Broker Or Finder.  Each of the parties represents and
warrants that it has dealt with no broker or finder, in connection with any of
the transactions contemplated by this Agreement, and, insofar as it knows, no
broker or other person is entitled to any commission or finder's fee in
connection with any of these transactions.  Seller and Buyer each agree to
indemnify and hold harmless the other against any loss, liability, damage,
cost, claim or expense incurred by reason of any brokerage commission, or
finder's fee alleged to be payable because of any act, omission or statement of
the indemnifying party.

         13.4    Publicity.  Except as required by law, neither party will
issue any press release or public notice concerning the transactions
contemplated by this Agreement without prior approval of the other party, which
approval will not be unreasonably withheld.

         13.5    Incorporation of Exhibits.  All exhibits and schedules
attached or to be delivered hereto and referred to herein are incorporated in
this Agreement as though fully set forth hereto.  A list of the Schedules to be
delivered after the date of this Agreement is attached hereto as Exhibit 5.
<PAGE>   36
                                       32

         13.6    Attorneys' Fees.  Each party shall bear the cost of its own
attorneys' fees incurred in connection with the preparation of this Agreement
and consummation of the transactions described herein.  Notwithstanding the
foregoing, in any action between the parties seeking enforcement of any of the
terms and provisions of this Agreement or in connection with any of the
property described herein, the prevailing party in such action shall be
awarded, in-addition to damage, injunctive or other relief, its reasonable
costs and expenses, not limited to taxable costs, and reasonable attorneys'
fees.

         13.7    Costs.  All recording, transfer, sales and documentary
transfer taxes, fees, charges and assessments resulting or arising from the
sale and purchase of the Assets and the assumption of the Deposits, not
otherwise specifically allocated between the parties, shall be paid by the
Seller, including, without limitation, all regulatory application fees to the
OTS.
<PAGE>   37
                                       33

         13.8    Notices.  All notices, requests, demands and other
communication given or required to be given under this Agreement shall be in
writing, duly addressed to the parties as follows:

                 To Buyer:

                 J. L. Helvey
                 Group Senior Vice President
                 World Savings and Loan Association
                 1901 Harrison Street
                 Oakland, California 94612-3587

                 To Seller:

                 Dan J. Cheever
                 President and Chief Executive Officer
                 PriMerit Bank, FSB
                 P.O. Box 98599
                 Las Vegas, Nevada 89193

         13.9    Assignment.  This Agreement may not be assigned by either
party without the prior written consent of the other party, and any attempted
assignment in violation of this section shall be void.

         13.10   Successors.  This Agreement shall be binding upon the parties
hereto and their respective successors.

         13.11   Governing Law.  This Agreement shall be construed in
accordance with and governed by the laws of the State of California, exclusive
of the conflict of laws provisions thereof.  Each of the parties hereto hereby
irrevocably and unconditionally consents to the exclusive jurisdiction of the
courts of the State of California located in the County of Alameda and of the
United States of America in and for the Northern District of California, for
any actions, suits or proceedings arising out of or relating to this Agreement
and the transactions contemplated hereby (and agrees not to commence any
action, suit or proceeding relating thereto except in such courts).

         13.12   Entire Agreement.  This Agreement and the documents referred
to herein contain all of the agreements of the parties to it with respect to
the matters contained herein and no prior or contemporaneous agreement or
understanding, oral or written, pertaining to any such matters shall be
effective for any purpose. No provision of this Agreement may be amended or
added to except by an agreement in writing signed by the parties hereto or
their respective successors and expressly stating that it is an amendment of
this Agreement.
<PAGE>   38
                                       34

         13.13   Heading.  The headings of this Agreement are for purposes of
reference only and shall not limit or define the meaning of the provisions of
this Agreement.

         13.14   Severability.  If any paragraph, section, sentence, clause or
phrase contained in this Agreement shall become illegal, null or void or
against public policy, for any reason, or shall be held by any court of
competent jurisdiction to be illegal, null or void or against public policy,
the remaining paragraphs, sections, sentences, clauses or phrases contained in
this Agreement shall not be affected thereby.

         13.15   Waiver.  The waiver of any breach of any provision under this
Agreement by any party hereto shall not be deemed to be a waiver of any
preceding or subsequent breach under this Agreement.

         13.16   Counterparts.  This Agreement may be executed in any number of
counterparts, each of which shall be an original but all of which shall
constitute one and the same instrument.
<PAGE>   39
                                       35

         IN WITNESS WHEREOF, the parties hereto have duly authorized and
executed this Agreement as of the date first above written.



                                          WORLD  SAVINGS AND LOAN ASSOCIATION



                                          By: ________________________________
                                          Title:  Senior Vice President





                                          PRIMERIT BANK, FSB



                                          By _________________________________
                                          Title:  President & Chief Executive 
                                                  Officer        
<PAGE>   40
                                   SCHEDULE 1



                        BRANCH OFFICES OF PRIMERIT BANK

<TABLE>
<CAPTION>
Branch Name                                      Address                            
- -----------                ---------------------------------------------------
<S>                        <C>
Fiesta Mall                1305 S. Alma School Road, Mesa

Power & Broadway           6750 E. Broadway, Mesa

Scottsdale                 6929 E. Shea Boulevard, Scottsdale

Sun City - Grand           10659 Grand Avenue, Sun City

Sun City- Bell             10238 W. Bell Road, Sun City

Sun City West              19001 R.H. Johnson, Sun City West

Phoenix                    1846 E. Camelback Road, Phoenix
</TABLE>
<PAGE>   41
                                   SCHEDULE 2



                       OWNERSHIP STATUS OF BRANCH OFFICES


<TABLE>
<CAPTION>
                 Name of Branch                    Interest to be Transferred
                 --------------                    --------------------------
<S>      <C>                                       <C>
A.       Purchased Branches
         ------------------

                 Fiesta Mall                       Fee
                 Power & Broadway                  Fee
                 Scottsdale                        Fee
                 Sun City West                     Fee

B.        Leased Branches
          ---------------

                 Sun City - Grand                  Leasehold
                 Phoenix                           Leasehold
</TABLE>
<PAGE>   42
                                SCHEDULE 6.14(g)



                         SCHEDULE OF LABOR DISPUTES AND
                      OTHER MATTERS RELATING TO EMPLOYEES
<PAGE>   43
                                SCHEDULE 6.14(e)



                           SCHEDULE OF CERTAIN EVENTS
                          UNDER COMPANY EMPLOYEE PLANS
<PAGE>   44
                                   EXHIBIT I



                   ALLOCATION OF PURCHASE PRICE IN ACCORDANCE
                 WITH SECTION 1060 OF THE INTERNAL REVENUE CODE


         Allocation of Purchase Price under Section 2.4 of the Agreement:

                 A.  Fixed Assets             $_______________________________

                 B.  Account Loans            $_______________________________

                 C.  Core Deposit Intangible  $_______________________________

                 D.  Cash on Hand             $_______________________________

                 E.  Goodwill and/or going 
                     concern value            $_______________________________
<PAGE>   45
                                   EXHIBIT 2

                       WORLD SAVINGS AND LOAN ASSOCIATION
                                      AND
                               PRIMERIT BANK, FSB

                        PRELIMINARY SETTLEMENT STATEMENT

         This Preliminary Settlement Statement is provided by PriMerit Bank,
FSB ("Seller") to World Savings and Loan Association ("Buyer") pursuant to the
terms of the Agreement to Purchase Assets and Assume Liabilities dated as of
May ____, 1993, between Buyer and Seller (the "Agreement"). Unless otherwise
defined, all capitalized terms used in this Preliminary Settlement Statement
shall have the meanings attributed to them in the Agreement.

                          Calculation of Cash Payment

A.       Purchase Price under the Agreement equals the sum of:

                 Net Book Value of Fixed Assets 
                 as reflected on updated
                 Schedule 3.1.                    $__________________________

                 Net Book Value of Account Loans 
                 as reflected on updated
                 Schedule 3.3                     $__________________________

                 Cash On Hand as reflected on 
                 Schedule 1.1                     $__________________________

                 Deposit Premium (Core Deposits 
                 as reflected on updated
                 Schedule 3.2 ($         ) 
                 multiplied by 0.2%)              $__________________________

         Total Purchase Price under Agreement     $__________________________

B.       Deposits to be assumed (as reflected on 
         updated Schedule 3.2 )                   $__________________________

                 less Total Purchase Price        $__________________________

                 plus prorations for which 
                 Seller will reimburse Buyer      $__________________________

                 less prorations for which 
                 Buyer will reimburse Seller      $__________________________

                 equals CASH PAYMENT              $
                                                   ==========================
<PAGE>   46
                                   EXHIBIT 3


                              ASSUMPTION AGREEMENT


         WORLD SAVINGS AND LOAN ASSOCIATION ("World Savings"), a federal
savings and loan association, and PRIMERIT BANK, FSB ("PriMerit"), have
executed and delivered this Assumption Agreement ("Assumption Agreement")
pursuant to the terms of the Agreement to Purchase Assets and Assume
Liabilities dated May  ____, 1993 (the "Agreement").  Unless otherwise defined
herein, all capitalized terms used in this Assumption Agreement shall have the
meanings attributed to them in the Agreement.

         For value received, World Savings hereby assumes, as of the close of
business on the date hereof, all obligations of Seller to pay the principal
amount of each Deposit plus Accrued Interest thereon assumed by World Savings
under the terms of the Agreement. In addition, World Savings hereby assumes, as
of the close of business on the date hereof, the obligations of PriMerit
relating to the safe deposit box business conducted at the Branch Offices and
the obligations of PriMerit under the Account Loans and the Assumed Contracts.
Notwithstanding anything contained herein to the contrary, World Savings does
not hereby assume, and shall have no liability for, any debts, liabilities or
obligations of PriMerit of whatever kind or nature other than as specifically
set forth herein.

         This Assumption Agreement shall not create in any third parties
(including, but not limited to, deposit account holders or borrowers): (a) any
rights or remedies against World Savings which such parties did not have
against PriMerit prior to the execution and delivery of this Assumption
Agreement with respect to the debts, liabilities or obligations specifically
assumed herein; or (b) any claims against World Savings with respect to
deposits, other than for payment of principal and accrued interest as of the
close of business on the date hereof; or (c) any claims against World Savings
with respect to any deposit not fully and accurately reflected in final
Schedule. 3.2; or (d) any claims against World Savings with respect to the
Account Loans, other than for the administration thereof after the date hereof.

         The Assumption Agreement shall be governed by and construed in
accordance with the laws of the State of California, exclusive of the conflict
of laws provisions thereof.
<PAGE>   47
         IN WITNESS WHEREOF, World Savings and PriMerit have caused this
Assumption Agreement to be signed by their duly authorized officers as of
the_____________ day of _______________, 1993.



PRIMERIT BANK, FSB                  WORLD SAVINGS AND LOAN
                                    ASSOCIATION



BY:_____________________________    BY:_______________________________________
[ NAME ]                            [ NAME ]
[ TITLE ]                           [ TITLE ]
<PAGE>   48
                                   EXHIBIT 4


                          BILL OF SALE AND ASSIGNMENT

         For good and valuable consideration, the receipt and adequacy of which
are hereby acknowledged, PRIMERIT BANK, FSB ("PriMerit") does hereby assign,
grant, sell, transfer and deliver to WORLD SAVINGS AND LOAN ASSOCIATION ("World
Savings"), its successors and assigns, in accordance with the Agreement to
Purchase Assets and Assume Liabilities dated as of May _____, 1993 by and
between World Savings and PriMerit (the "Agreement"), all of Seller's right,
title and interest in and to all of the Fixed Assets, Account Loans, Cash on
Hand, Records, Core Deposit Intangible and other assets related thereto. Unless
otherwise defined herein, all capitalized terms used in this Bill of Sale and
Assignment shall have the meanings attributed to them in the Agreement.
PriMerit acknowledges that World Savings does not assume and shall have no
liability for any debts, liabilities or obligations of PriMerit of any kind
whatsoever except as specifically set forth in the Agreement or in any other
writing executed by World Savings.

         PriMerit does hereby covenant to World Savings, and its successors and
assigns, that it is lawfully seized of the foregoing properties and assets;
that it holds the foregoing properties and assets free and clear of all liens,
claims, encumbrances, security interests, pledges, leases, equities,
conditional sales contracts, charges, restrictions and chattel mortgages of any
kind whatsoever, except as disclosed in a schedule delivered to World Savings
under the Agreement; that it has good title to, and good and lawful authority
to convey the foregoing properties and assets; and that it will protect and
defend World Savings' right, title and interest in and to such properties and
assets.

         At any time after the date hereof, PriMerit shall, at the request of
World Savings, execute and deliver any further instruments or documents and
take all such further action as World Savings may reasonably request in order
to transfer to and vest in World Savings all of PriMerit's right, title and
interest in and to all of the foregoing properties and assets.

         This Bill of Sale and Assignment shall be construed in accordance with
and governed by the laws of the State of California exclusive of the conflict
of laws provisions thereof.

         This Bill of Sale and Assignment has been duly executed by Seller as
of the_________ day of _____, 1993.

                                    PRIMERIT BANK, FSB


                                    By:_______________________________________
                                    [Name]
                                    [Title]
<PAGE>   49
                                   EXHIBIT 5


                       LIST OF SCHEDULES TO BE DELIVERED
                        AFTER THE DATE OF THE AGREEMENT


I.       Schedules to be Delivered by Seller to Buyer

<TABLE>
         <S>                      <C>
         Schedule 1.1             Schedule of Cash on Hand (at Closing and at 
                                  Post-Closing)

         Schedule 2.6             Deferred/Prepaid Expenses and Fees to be 
                                  Prorated between Buyer and Seller (at Closing 
                                  and at Post-Closing)

         Schedule 3.1             Schedule of Fixed Assets (within 10 business 
                                  days from the date of the Agreement, at 
                                  Closing and at Post-Closing)

         Schedule 3.2             Schedule of Deposits (within 10 business days 
                                  from the date of the Agreement, at Closing and 
                                  at Post-Closing)

         Schedule 3.3             Schedule of Account Loans (within 10 business 
                                  days from the date of the Agreement, at 
                                  Closing and at Post-Closing)

         Schedule 3.4             Schedule of Assumed Contracts (within 10 
                                  business days from the date of the Agreement 
                                  and at Closing)

         Schedule 6.14(a)         Schedule of Company Employee Plans and 
                                  Employee Agreements (within 10 business days 
                                  from the date of the Agreement)

         Schedule 8.1(c)          Schedule of Information Relating to Operation 
                                  of Branch Offices (at request of Buyer within 
                                  10 business days from the date of the 
                                  Agreement)

         Schedule 12.2            Schedule of Holds (at Closing)
</TABLE>
<PAGE>   50
II.      Schedules to be Delivered by Buyer to Seller

<TABLE>
         <S>                      <C>
         Schedule 3.2A            Schedule of Deposit Accounts Excluded for 
                                  Legal or Operational Reasons (not less than 
                                  30 days prior to Closing)

         Schedule 3.2B            Schedule of Deposit Accounts Excluded due to 
                                  Encumbrances Thereon (within 21 but no less 
                                  than 14 days prior to Closing)

         Schedule 11.1            Schedule of Employees to be Offered Employment 
                                  by Buyer (not less than 30 days prior to 
                                  Closing)
</TABLE>
<PAGE>   51
                    BRANCH PURCHASE AND ASSUMPTION AGREEMENT


                 This Branch Purchase and Assumption Agreement (the
"Agreement") is made as of May 12, 1993, at Oakland, by PriMerit Bank, FSB, a
Federal Savings Bank ("PriMerit"), and World Savings and Loan Association, a
Federal Savings and Loan Association ("World ").

                                    RECITALS

                 WHEREAS, World and PriMerit are contemporaneously entering
into the Purchase Agreement (as defined herein) pursuant to which World will
acquire certain assets and assume certain liabilities of PriMerit located in
the State of Arizona; and

                 WHEREAS, PriMerit's execution of and performance under this
Agreement are conditions to World's entering into and performing its
obligations under the Purchase Agreement; and

                 WHEREAS, World's execution of and performance under this
Agreement are conditions to PriMerit's entering into and performing its
obligations under the Purchase Agreement;

                 NOW, THEREFORE, World and PriMerit agree as follows:


                                   ARTICLE I

                                 DEFINED TERMS

                 1.1      As used herein, the following items shall have the
meanings respectively indicated:

                          (a)     "Branch Lease" means that certain lease
between PriMerit and Mariah Properties Ltd., dated November 21, 1989, with
respect to PriMerit's premises at King's Inn Center, Sun City, Arizona;

                          (b)     "Branch Lease Office" shall mean the premises
(including fixtures and equipment) demised under the Branch Lease;

                          (c)     "Branch Leasehold Estate" means the tenant's
leasehold estate under the Branch Lease, including any and all rights,
easements, tenements, hereditaments, and appurtenances benefiting or relating
thereto;

                          (d)     "Camelback Lease" means that certain Standard
Industrial/Commercial Single-Tenant Lease--Net, dated May 2, 1991, as modified
by that certain Amendment and Modification dated July 23, 1991, between Ruth
Watanabe as
<PAGE>   52
"Lessor" and PriMerit as "Lessee" having real property in the City of Phoenix 
as the premises demised thereunder;

                          (e)     "Camelback Leasehold Estate" means the
tenant's estate under the Camelback Lease, including any and all rights,
easements, tenements, hereditaments, and appurtenances benefiting or relating
thereto;

                          (f)     "Camelback Office" means the premises demised
under the Camelback Lease;

                          (g)     "Camelback Sub-Leasehold Estate" means the
subtenant's estate under the "Camelback Sublease", including any and all
rights, easements, tenements, hereditaments, and appurtenances benefiting or
relating thereto;

                          (h)     "Camelback Sublease" means that certain
sublease contemplated by Section 8.3(f) below between PriMerit as sublandlord
and World as subtenant having as the premises demised thereunder the same
premises as are demised to PriMerit under the Camelback Lease;

                          (i)     "Closing" means the consummation of the
conveyances contemplated by Section 4.1 below as provided in and subject to the
terms of this Agreement;

                          (j)     "Closing Date" means the date on which the
Closing occurs;

                          (k)     "Contract Rights" means all rights and
interests of PriMerit in, to, or under all contracts, licenses, agreements, or
other instruments relating to the Realty except to the extent that they are the
subject of the Purchase Agreement and except the Branch Lease, the Camelback
Lease and the PriMerit/Camelback Mortgage;

                          (l)     "Environmental Laws" means, without
limitation, the Comprehensive Environmental Response, Compensation and
Liability Act, 42 U.S.C. Section Section  99 9601 et seq., the Emergency
Planning and Community Right-to-Know Act of 1986, 42 U.S.C. Section Section  99
11001, et seq., the Resource Conservation and Recovery Act, 42 U.S.C. Section
Section  99 6901, et seq., the Toxic Substances Control Act, 15 U.S.C. Section
Section  99 2601 et seq., the Federal Insecticide, Fungicide, and Rodenticide
Act, 7 U.S.C. Section Section  99 136, et seq., the Clean Air Act, 42 U.S.C.
Section Section  99 7401, et seq., the Clean Water Act (Federal Water Pollution
Control Act), 33 U.S.C. Section Section  99 1251 et seq., the Safe Drinking
Water Act, 42 U.S.C. Section Section  99 300f et seq., the Occupational Safety
and Health Act, 29 U.S.C. Section Section  99 641, et seq., and the Hazardous
Substances Transportation Act, 49 U.S.C. Section Section  99 1801, et seq., as
any of the above statutes have been or may be amended from time to time, all
rules and regulations promulgated pursuant to any of the above statutes, and
all other foreign, federal, state, or local laws, statutes, ordinances, rules
and regulations governing Environmental Matters, as the same have been or may
be amended from time to time, and, unless the context otherwise requires,
Environmental Law includes any common law cause of action relating to
Environmental Matters;
<PAGE>   53
                          (m)     "Environmental Matters" mean any matter
arising out of, relating to, or resulting from, pollution, contamination,
protection of the environment, human health or safety, health or safety of
employees, sanitation, and any matters relating to emissions, discharges,
disseminations, releases, or threatened releases of Hazardous Substances into
the air (indoor and outdoor), surface water, groundwater, soil, land surface or
subsurface, buildings, facilities, real or personal property or fixtures, or
otherwise arising out of, relating to, or resulting from the manufacture,
processing, distribution, use, treatment, storage, disposal, transport, or
handling of Hazardous Substances;

                          (n)     "Hazardous Substances" means any pollutants,
contaminants, toxic or hazardous or extremely hazardous substances, materials,
wastes, constituents, or chemicals (including, without limitation, petroleum or
any by-products or fractions thereof, any form of natural gas, lead, Bevill
Amendment materials, asbestos and asbestos-containing materials,
polychlorinated biphenyls ("PCB's") and PCB-containing equipment, radon and
other radioactive elements, infectious, carcinogenic, mutagenic, or etiologic
agents, pesticides, defoliants, explosives, flammables, corrosives, and urea
formaldehyde foam insulation) that are regulated by, or may now or in the
future form the basis of liability under, any Environmental Laws. Hazardous
Substances shall not include commercially available consumer products
reasonably appropriate for use in or for routine maintenance and upkeep of a
branch office of a financial institution provided that such products have been
or are being used, stored, and disposed of in accordance with label
instructions, and provided further that such products have not caused any
Release;

                          (o)     "Knowledge" with respect to PriMerit means
knowledge that any officer of PriMerit with a rank of Vice President or higher
or any manager of a Branch Office (as defined in the Purchase Agreement) has or
should have, after reasonable inquiry;

                          (p)     "Locations" shall mean, collectively, the
Branch Lease Office, the Camelback Office, and the Properties, and the singular
term "Location" shall mean any one of them;

                          (q)     "Net Book Value" means, with respect to each
Property, the book value of such Property on the Closing Date less applicable
reserves, encumbrances, and other deductible items, as reflected in the
financial statements of PriMerit computed in accordance with generally accepted
accounting principals consistently applied;

                          (r)     "Permitted Exceptions" shall mean the
exceptions to title to the Realty as reflected in the Title Commitments or
Surveys thereof which (i) do not render title to the Realty unmarketable, (ii)
do not adversely affect, diminish, or limit World's ability to use any portion
of the Realty for functions relating to the operation of a financial
institution or related office use, and (iii) other than the instruments
identified in Schedule G, do not adversely affect, diminish or limit World's
ability to use any portion of the Realty for other uses permitted by applicable
zoning laws;
<PAGE>   54
                          (s)     "PriMerit/Camelback Mortgage" means that
certain Deed of Trust made by Watanabe in favor of PriMerit dated July 24,
1991, and recorded on July 31, 1991, in the Office of the Maricopa County,
Arizona Recorder under recording number 91 355969;

                          (t)     "PriMerit's Real Property Interests" shall
mean, collectively, the Properties, the Branch Leasehold Estate, and the
Camelback Leasehold Estate;

                          (u)     "Properties" means, collectively, all the
real property set forth and described in Schedule A hereto, together with any
and all rights and easements benefiting the Properties or any of them and all
improvements (including fixtures and equipment, except to the extent covered by
the Purchase Agreement), appurtenances, tenements, and hereditaments to the
Properties, and the singular term "Property" shall have the same meaning with
respect to each of the four tracts separately numbered on Schedule A hereto and
the rights and benefits related thereto;

                          (v)     "Purchase Agreement" means that certain
Agreement to Purchase Assets and Assume Liabilities between World and PriMerit
of even date herewith;

                          (w)      "Purchase Price" shall have the definition
set forth in Section 3.1 hereof:

                          (x)     "Realty" shall mean, collectively, the
Properties, the Branch Leasehold Estate, and the Camelback Subleasehold Estate;

                          (y)     "Release" shall include, without limitation,
any releasing, spilling, leaking, pumping, pouring, emitting, emptying,
discharging, injecting, escaping, leaching, dumping, or disposing into the
environment (indoor or outdoor) (including the abandonment or discharging of
barrels, containers, and other closed receptacles containing any Hazardous
Substance) that may give rise to any liability or obligation under any
Environmental Law;

                          (z)     "Surveyor" means a surveying company duly
licensed in the State of Arizona and mutually acceptable to World and PriMerit;

                          (aa)    "Surveys" means, collectively, the surveys of
each of the Locations, dated not earlier than the date of this Agreement with
respect to the Initial Surveys (as defined in Section 5.2 below), and dated not
earlier than thirty (30) days prior to the Closing Date with respect to the
Updated Surveys, prepared by the Surveyor and meeting the Minimum Standard
Detail Requirements for ALTA/ACSM Land Title Surveys for Class A property with
all additional Table 3 requirements satisfied;

                          (bb)    "Title Commitments" means, collectively, the
separate commitments issued by the Title Company and delivered to World in
accordance with the terms and provisions of Section 5.1 hereof to issue the
Title Policies with respect to the Realty naming World as proposed insured in
the respective amounts for each Property, the Branch Leasehold Estate and the
Camelback Sub-Leasehold Estate as set forth in Schedule 
<PAGE>   55
B, together with copies of all documents referenced in such. commitments as 
exceptions;

                          (cc)    "Title Company" means First American Title
Insurance Company of Arizona, or such other title company as shall be mutually
acceptable to the parties hereto;

                          (dd)    "Title Defect" shall have the meaning set
forth in Section 5.1 hereof;

                          (ee)    "Title Policies" means collectively, the
separate Owner's Policies of Title Insurance (1990 ALTA Form) with Extended
Coverage for Arizona with respect to each Property, the Branch Leasehold
Estate, and the Camelback Subleasehold Estate issued by the Title Company in
the respective amounts set forth in Schedule B hereto, as provided in Section
4.2 hereof; provided, however, that at Closing, an unconditional commitment
from the Title Company to issue the Title Policies dated as of the Closing Date
from which all requirements have been deleted and for which all premiums and
associated expenses have been paid in full shall be deemed a Title Policy;

                          (ff)    "Watanabe/Camelback Agreements" means,
collectively, all agreements made by or between Watanabe and/or PriMerit in
respect of or related to the Camelback Office, including but not limited to the
Camelback Lease and the PriMerit/Camelback Mortgage; and

                          (gg)    "Warranty Deed" shall mean a general warranty
deed from PriMerit to World in the form set forth in Exhibit A hereto.
<PAGE>   56
                                   ARTICLE II

                      AGREEMENT OF PURCHASE AND ASSUMPTION

                 2.1      In consideration of the covenants and subject to the
conditions of the respective parties, as hereinafter set forth, PriMerit agrees
to sell and convey to World, and World agrees to purchase and take from
PriMerit, all right title and interest of PriMerit in and to the Realty.


                                  ARTICLE III

                                 PURCHASE PRICE

                 3.1      The Purchase Price. The Purchase Price to be paid by
World to PriMerit for the Property, the Branch Lease, the Camelback Sublease
and all other assets, interests and rights to be conveyed to World by PriMerit
pursuant to this Agreement shall be the total of the Net Book Values of each
Property, less $335,063 for each Property (the "Deduction"), subject to
adjustments as set forth in Article V and Section 10.3 hereof, provided
however, that in the event that World and PriMerit do not enter into the
Camelback Sublease, the Deduction shall not be applied, and the Purchase Price
shall equal the total Net Book Values of the Properties subject to adjustments
as set forth in Article V and Section 10.3 hereof.

                 3.2      Payment of Purchase Price.  The Purchase Price shall
be payable to PriMerit on the Closing Date by wire transfer of funds,
immediately available, and may be included with or offset against any other
amounts owing between World and PriMerit under Section 4.2 of the Purchase
Agreement on the Closing Date.


                                   ARTICLE IV

                                     TITLE

                 4.1      Conveyance.  Conveyance of (i) fee simple title to
each Property shall be made by separate Warranty Deed, (ii) the Branch
Leasehold Estate shall be made by written assignment as provided in Sections
10.2(a)(iii) and 10.2(b)(ii) below, and (iii) the Contract Rights shall be made
by written assignment with full covenants, warranties, and indemnities.  The
Camelback Sub-Leasehold Estate shall be created by the execution and delivery
of the Camelback Sublease as provided in Sections 10.2(a)(viii) and 10.2(b)(ii)
hereof.  Such conveyances and the Camelback Sublease shall be accompanied by
duly certified resolutions of PriMerit's Board of Directors authorizing same.

                 4.2      Title Policies.  At the Closing, PriMerit shall cause
all the Title Policies to be issued to World.  The costs thereof shall be borne
by the parties as set forth hereinbelow.  The Title Policies shall contain no
exceptions other than (i) an exception for 
<PAGE>   57
taxes for the tax year of the Closing not then due and payable and (ii) the 
Permitted Exceptions.  The Title Policies shall provide affirmative coverage 
over covenants, restrictions, easements, survey matters, and other matters as 
requested by World, shall affirmatively insure access from such publicly 
dedicated roads as designated by PriMerit, and shall insure the contiguity of 
each parcel comprising a single Location.

                 4.3      Excluded Contracts.  Notwithstanding anything to the
contrary herein, World is not obligated under this Agreement to assume or be
bound by any contract, agreement, settlement, or decree relating to clean-up,
abatement, or other action in connection with the remediation of any existing
environmental liabilities or relating to the performance of any environmental
audit or study with respect to the Realty.


                                   ARTICLE V

                                 DUE DILIGENCE

                 5.1      Title Review.  PriMerit has heretofore delivered to
Word legal descriptions of each Property, the Branch Lease Office, and the
Camelback Office.  On or before the thirtieth day following the date of this
Agreement, PriMerit, at its expense, shall deliver to World the Title
Commitments.  In addition to other periods of time for which the time for
Closing may be extended by World as provided in this Agreement, the Closing and
all other deadlines for World's performance of its obligations or exercise of
its rights under this Agreement shall be extended by one day for each day
beyond such thirtieth day until such Title Commitments have been delivered.
World shall notify PriMerit in writing within thirty (30) days after the date
on which World has received all the Title Commitments and Initial Surveys of
any matter appearing as an exception to title or shown on an Initial Survey
which is not a Permitted Exception (a "Title Defect"); PriMerit shall use its
best efforts to cure all Title Defects of which PriMerit is notified; provided,
however, that PriMerit shall not be required under this Section 5.1 to expend
an amount in excess of Fifty Thousand Dollars ($50,000) exclusive of attorneys'
fees to cure Title Defects with respect to any single Property, the Branch
Leasehold Estate, or the Camelback Sub-Leasehold Estate except for Title
Defects which can be cured by payment of a liquidated sum (e.g., mechanics'
liens, mortgages, security agreements, taxes due and payable as of the Closing
Date), which shall be cured by PriMerit at or prior to Closing.  If PriMerit
shall fall to cure one or more Title Defects by the fifth day immediately
preceding the scheduled Closing Date, World may elect, in its sole option, (i)
to purchase the Property, assume the Branch Leasehold Estate, or acquire the
Camelback Subleasehold Estate, as the case may be, affected by such Title
Defect provided that World shall be entitled to a reduction in the Purchase
Price to the extent such exception results in a reduction in the fair market
value of the affected Realty, as agreed to by the parties, or (ii) to exclude
such Property, Branch Lease Office, or Camelback Office with a reduction to the
Purchase Price equal to the Net Book Value of such excluded Property.

                 5.2      Surveys.  PriMerit shall deliver the Surveys of each
Location to World within forty-five (45) days after the date hereof (the
"Initial Surveys"). Not earlier than the 
<PAGE>   58
date thirty (30) days prior to the Closing Date, nor later than the date ten 
(10) days prior to the Closing Date, PriMerit, at PriMerit's sole cost and 
expense, shall cause the Surveys to be updated as required for issuance of the 
Title Policies (the "Updated Surveys") and delivered to World.  Each of the 
Surveys to contain substantially the following certification in addition to the 
certification required by the Minimum Standards referred to in Section 1.1 (as) 
above:

                 I, ____________________, a registered public Surveyor, do
         hereby certify unto Title Company, World Savings and Loan Association,
         a Federal Savings and Loan Association, PriMerit Bank FSB, and Fried,
         Frank, Harris, Shriver & Jacobson that the plat shown hereon
         represents the results of an on-the-ground survey made under my
         direction and supervision on the _____ day of _______________, 1993;
         that all corners are as shown hereon; that the survey is true and
         correct; that there are no discrepancies, conflicts or shortages in
         area or boundaries or any encroachments or any overlapping of
         improvements on any adjacent property, easements or rights-of-way
         evident on the ground except as shown hereon; that there are no
         easements for roadways, water courses, creeks, ponds, flood ditches,
         power lines, rights-of-way, setbacks, or building lines except as
         shown hereon; that all on-the-ground encumbrances to title referenced
         in that certain title commitment issued by _______________ under
         _______________ are accurately reflected hereon; that the locations
         and dimensions of all buildings, improvements, easements, and
         rights-of-way reflected hereon are accurately shown; that no such
         buildings or improvements violate any setback requirement; that the
         surveyed property has access to and from _______________, a dedicated
         roadway (or roadways), and there are no vacancies or gaps between the
         surveyed property and such dedicated roadway (or roadways); that the
         surveyed property is not located within the limits of any 100 year
         flood plain as shown on the most current National Flood Insurance
         Program Map covering the surveyed property, that the surveyed property
         is comprised of __ occupied improvements, and that the surveyed
         property is comprised of ___ acres.

                 In addition to and not in limitation of World's rights in
respect of Title Defects, within thirty (30) days after its receipt of each
Survey, World shall have the fight to approve or disapprove the state,
condition, and other matters in respect of each Location as reflected in the
respective Surveys thereof, including but not limited to boundaries, square
footage and configuration.

                 5.3      World's Rights in the Event of Objections to Title or
Survey. Exceptions to the title to any of the Properties, the Branch Leasehold
Estate or the Camelback Sub-Leasehold Estate first raised subsequent to the
Initial Surveys or the respective effective date of the Title Commitments shall
automatically be deemed Title Defects and World shall have the rights and
remedies provided in the last sentence of Section 5.1.

                 5.4      Inspection of the Properties.  World, its agents and
representatives, upon reasonable notice to PriMerit, shall have the right and
license to enter upon and inspect the Properties, at any reasonable time after
the date of this Agreement and in such manner as is reasonably acceptable to
PriMerit.  On or before the date thirty (30) days after 
<PAGE>   59
the execution of this Agreement, World shall give written notice to PriMerit 
(the "Notice of Condition of the Properties") of defects discovered in the 
structure, roof, facade, elevators, or mechanical, electrical, plumbing, HVAC, 
or fire protection systems which comprise or are a, part of the improvements on 
or at the Properties, which notice shall (i) identify each defect with respect 
to the particular Property affected, (ii) state World's reasonable estimate of 
the costs and expenses which will be required to correct such defects as an
aggregate amount for each Property (an "Estimate for a Specific Property"), and
(iii) state whether World elects to have PriMerit correct the defects in
respect of each Property or to take a credit in the amount of the Estimate for
a Specific Property in respect of such Property against that portion of the
Purchase Price attributable to such Property; provided World shall not include
in the Notice of Condition of the Properties defects in respect of any Property
if the Estimate for a Specific Property in respect of such Property shall be
less than Five Thousand Dollars ($5,000) and further provided World's election
of correction or a credit as described in clause (iii) of this 5.4 shall be
made in respect of all defects at a single Property.  If World's Estimate for a
Specific Property in respect of any Property exceeds One Hundred Thousand
Dollars ($100,000), World and PriMerit may elect, in their respective sole and
absolute discretions, by delivery of written notice to the other within ten
(10) days following the Notice of Condition of the Properties, to exclude such
Property from the Properties to be conveyed pursuant to this Agreement, in
which event the Purchase Price shall be reduced by the Net Book Value of such
excluded Property.  With respect to all Properties which have not been excluded
by either party as permitted by the immediately preceding sentence and in
respect of which World had not elected to take a credit, PriMerit shall
promptly commence the correction of specified defects and diligently and
uninterruptedly prosecute the correction of such defects to completion prior to
the Closing Date in good faith at PriMerit's sole cost and expense and in
compliance with all applicable laws and regulations; provided, however, that if
notwithstanding such prosecution of corrective work and through no fault of
PriMerit, PriMerit has not completed such corrective work by the Closing Date,
World shall close the acquisition of such Properties at Closing and the
Purchase Price in respect of such Properties shall be reduced by the total of
all amounts estimated by World as reasonably necessary to complete the
corrective work at all Properties.  At Closing, PriMerit shall assign all
permits previously issued for such corrective work to World or its designee.
If PriMerit shall default in its obligations to correct defects under this
Section 5.4 with respect to any Property, World may exclude such Property from
the Properties to be conveyed pursuant to this Agreement with the reduction in
Purchase Price equal to the Net Book Value of such excluded Property.

                 5.5      Environmental Investigation and Report.

                          (a)     Phase I Environmental Site Assessment
Reports.  Within five (5) business days of the date of this Agreement, PriMerit
shall submit to World the name or names of four environmental consultants
acceptable to PriMerit who are qualified to perform a Phase I Environmental
Site Assessment for each of the Properties, the Branch Lease Office, or the
Camelback Office.  Within five (5) business days of such submittal, World shall
indicate in writing whether it approves of any one or more of such
environmental consultants.  If World does not approve of any of such
consultants, then World shall designate a consultant and PriMerit shall
designate a consultant, within five (5) 
<PAGE>   60
business days after notice to PriMerit of such disapproval, who shall select a 
third consultant acceptable to both such consultants within ten (10) business 
days thereafter.  Within thirty (30) days after the appointment of an 
environmental consultant, PriMerit, at its sole cost and expense, shall deliver 
to World a Phase I Environmental Site Assessment Report for each Property, the 
Branch Lease Office and the Camelback Office.

                          (b)     Phase II Environmental Investigation.  In the
event that any Phase I Environmental Site Assessment Report recommends further
investigation, such investigation shall be performed at PriMerit's sole cost
and expense in a reasonably expeditious manner.  PriMerit shall deliver to
World a written report upon the completion of such investigation.

                          (c)     Phase III Environmental Remediation.  In the
event that a Phase II Environmental Investigation of any of the Realty
concludes that any monitoring, clean-up, removal, restoration, or other
remedial work (collectively, "Remedial Work") is required under any applicable
Environmental Law, then PriMerit shall have the opportunity to perform such
Remedial Work at its sole cost and expense provided that such Remedial Work can
be completed to World's satisfaction prior to the Closing Date.  In the event
such Remedial Work either cannot be completed to World's satisfaction prior to
the Closing Date or such Remedial Work is not completed prior to the Closing
Date, then (i) World may agree in writing that PriMerit may perform the
Remedial Work, or (in) World may accept one or more Properties, the Branch
Lease Office or the Camelback Office, as the case may be, with such reduction
in the Purchase Price as the parties hereto shall agree to, or (iii) World may
exclude one or more Properties, the Branch Lease Office or the Camelback
Office, as the case may be, with a reduction to the Purchase Price in the event
of the exclusion of one or more Properties equal to the Net Book Value of such
excluded Properties.

                 5.6      Books and Records.  World, its agents and
representatives, upon reasonable notice to PriMerit, shall have the right and
license to enter upon and inspect the Camelback Office, to review the
PriMerit/Camelback Lease, the PriMerit/Camelback Mortgage, the
Watanabe/Camelback Agreements and any and all loan instruments or agreements by
or between Ruth Watanabe and PriMerit with respect to the Camelback Office for
the purpose of determining the effect, if any, such documents will have upon
World's proposed sublease of premises located in the Camelback Office, the
terms of the agreement and consent described in Section 8.3(b)(vi) below, and
the nondisturbance, recognition and attornment agreement described in Section
10.2(a)(viii) and 10.2(b)(ii) below.

                 5.7      Other Documents.  Within ten (10) business days after
the date of this Agreement, PriMerit shall deliver to World true and correct
copies of the following:

                          (a)     any and all real and personal property
leases, certificates of occupancy, service and maintenance contracts, books and
records, operating statements, invoices for utilities and repairs, tax records,
and any other agreements relating to the operation of the Locations together
with a schedule which indicates whether the consent of 
<PAGE>   61
a third party is required in order for each such lease, contract, or agreement 
to be assigned to World;

                          (b)     any and all plans and specifications for the
improvements constructed on the Locations and any as-built plans and surveys,
which PriMerit has in its possession; and

                          (c)     all notices received by PriMerit during the
past three (3) years regarding the Locations with respect to the violation of
any statutes, rules or regulations of government agencies, or violation of any
easements, covenants, conditions, or restrictions affecting the Locations.

                 5.8      Right to Terminate.  In the event that World shall
have the right, pursuant to this Article V, to exclude any combination of two
(2) or more of the Properties, the Branch Leasehold Estate, or the Camelback
Sub-Leasehold Estate from this Agreement, World shall have the further right,
at its sole discretion, (i) to accept and enforce this Agreement, excluding
such Properties, the Branch Leasehold Estates or the Camelback Leasehold Estate
as have been so excluded, or (ii) upon written notice to PriMerit, to terminate
this Agreement and the Purchase Agreement.

                 5.9      PriMerit's Right to Terminate.  In the event that
World shall elect, pursuant to this Article V, to exclude any combination of
two (2) or more of the Properties, the Branch Leasehold Estate, or the
Camelback Sub-Leasehold Estate from this Agreement, PriMerit shall have the
right, in its sole discretion and upon written notice to World, to terminate
this Agreement and the Purchase Agreement; provided, however, that the parties
hereto acknowledge that World's damages in the event of such termination of
this Agreement by PriMerit will be difficult or impossible to calculate, and
the parties therefore agree that (i) in the event of termination under this
Section 5.9 where World has excluded any combination of two (2) or more of the
Properties, the Branch Leasehold Estate, or the Camelback Sub-leasehold Estate
pursuant to Section 5.1 or Section 5.2 hereof, PriMerit shall be liable to
World in the amount of Two Hundred Fifty Thousand Dollars ($250,000) as
liquidated damages and not as a penalty, and (ii) in the event of termination
under this Section 5.9 where World has excluded one (1) Property, or the Branch
Leasehold Estate, or the Camelback Sub-Leasehold Estate pursuant to Section 5.1
hereof, PriMerit shall be liable to World in the amount of One Hundred
Twenty-Five Thousand Dollars ($125,000), as liquidated damages and not as a
penalty.


                                   ARTICLE VI

                    REPRESENTATIONS AND WARRANTIES OF WORLD

                 6.1      World represents and warrants to PriMerit that as of
the Closing Date, World shall have the full right, power, and authority to
carry out its obligations hereunder. World further represents and warrants to
PriMerit that all required corporate action necessary to authorize World to
enter into this Agreement and to carry out its obligations 
<PAGE>   62
hereunder has been taken, or upon Closing will have been taken.  World shall 
give PriMerit immediate notice of the occurrence of any event, or the receipt 
of any notice, which is likely to give rise to a breach by World of any of its 
representations or warranties set forth in this Article VI.

                 6.2      World represents and warrants to PriMerit that no
brokers, agents, or finders have been consulted or hired by World with respect
to this Agreement, the Purchase Agreement, or the transactions contemplated by
either agreement.


                                  ARTICLE VII

                   REPRESENTATIONS AND WARRANTIES OF PRIMERIT

                 1.1      PriMerit represents and warrants to World that on the
date hereof, PriMerit has good and marketable indefeasible title in fee simple
to the Properties and a good and marketable tenant's estate under the Branch
Lease, subject only to (a) the Permitted Exceptions, (b) the "Branch Fee
Mortgages" (as deemed in Section 8.3(b)(iv), with respect to the Branch
Leasehold Estate only), (c) other exceptions to title which may be removed by
payment of a liquidated sum, and (d) zoning, set back, building and other
similar restrictions which are not violated in any material respect and which
do not and will not, in World's opinion, adversely affect, limit or diminish
the use of any Property or the Branch Lease Office for the operation of a
financial institution or other business providing financial services or related
office uses.  PriMerit shall, as of the Closing, have good and marketable
indefeasible fee simple title to the Properties and a good and marketable
indefeasible tenant's estate under the Branch Lease free and clear of all
covenants, restrictions, easements, burdens, liens and other matters subject
only to matters described in clauses (a), (b) and (d) in the immediately
preceding sentence.

                 7.2      PriMerit represents and warrants to World that as of
the date of this Agreement and at all times hereafter until and including
Closing:

                          (a)     The legal descriptions set forth in Schedule
A describe all real property owned by PriMerit or used by PriMerit in
connection with the branch banking operations of PriMerit at the respective
branches identified therein and for ancillary or auxiliary purposes related to
such branch banking operations.  The demised premises under the Branch Lease
includes all the real property used by PriMerit in connection with the branch
banking operations of PriMerit at its Sun City Grand Branch and for ancillary
or auxiliary purposes related to such branch banking operations.  Schedule C
lists each present lessor and lessee under the Branch Lease.  The respective
conditions of each Property and the Branch Lease Office are such that they will
not have an adverse effect on the operations of a retail banking business
thereupon.  PriMerit is in exclusive possession of the Properties and the
Branch Lease Office, and there are no leases, licenses, or other agreements
granting an exclusive or non-exclusive right to use or otherwise affecting any
of them, in whole or in part, except the Branch Lease and those certain leases
identified in Schedule D hereto (collectively, the "PIS Leases").  The
Properties and the Branch Lease Office have been 
<PAGE>   63
classified by the respective zoning authorities in the respective zoning 
classifications set forth in Schedule E;

                          (b)     PriMerit has received no notice of, and to
PriMerit's Knowledge there has not occurred, any condemnation or threatened
condemnation proceedings affecting any Property or the Branch Lease Office, or
any part thereof;

                          (c)     There is no litigation, nor to PriMerit's
Knowledge is any litigation threatened, affecting PriMerit, the Locations or
PriMerit's Real Property Interests which would in any way constitute or give
rise to a lien, claim, or obligation of any kind against any of the foregoing,
and PriMerit has received no notice and has no Knowledge that any such
litigation is threatened or that facts exist which may give rise to such
litigation;

                          (d)     No person, firm, or entity has any right to
acquire an interest in PriMerit's Real Property Interests, or any part thereof;

                          (e)     No claims for unpaid bills for work performed
on or materials delivered to any of the Locations have been tendered, asserted,
or threatened, and no work has been performed with respect to any of PriMerit's
Real Property Interests for which payment in full has not been made;

                          (f)     PriMerit shall have, as of Closing, full
right, power, and authority to timely perform its obligations hereunder.  All
required corporate action necessary to authorize PriMerit to enter into this
Agreement and to perform its obligations hereunder has been taken;

                          (g)     To PriMerit's Knowledge, all the Locations
are free and clear of any and all Hazardous Substances and, except as set forth
in the Environmental Reports, there has not occurred any Release of a Hazardous
Substance on any of the Locations, or off the Locations as a result of any
construction on or operation and use of any of the Locations.  As of the
Closing Date all the Locations shall be free and clear of any and all Hazardous
Substances;

                          (h)     To PriMerit's Knowledge, the Locations have
at all times been operated, and are, in full compliance with all Environmental
Laws, orders, decrees, directives, permits, licenses, and judgments relating to
Environmental Matters;

                          (i)     To PriMerit's Knowledge, no underground or
above-ground storage tanks, incinerators, or surface impoundments exist or have
ever existed at, on, about, adjacent to, under, or within any of the Locations
nor have ever been removed from any such Locations;

                          (j)     PriMerit has not received: (i) any
communication, with respect to any of the Locations, indicating that it is or
may be a potentially responsible person or otherwise liable in connection with
any waste disposal site allegedly containing any Hazardous Substances or other
place used by any of the Locations for the disposal of any Hazardous Substances
or (ii) notice of any failure of PriMerit to comply in any material 
<PAGE>   64
respect with any Environmental Law or the requirements of any Environmental 
Permit applicable to any of the Locations;

                          (k)     To PriMerit's Knowledge, there has been no
Release or other dissemination at any time of any Hazardous Substances at, on,
about, adjacent to, under, or within any of the Locations;

                          (l)     Neither this Agreement nor the conveyance of
the Properties and the Branch Leasehold Estate nor the creation of the
Camelback Sub-Leasehold Estate will cause to be imposed on World any liability
to withhold any amount pursuant to Section  1445 of the Internal Revenue Code
(or the implementing regulations);

                          (m)     PriMerit has received no communication of an
actual or potential change in any applicable laws, ordinances, or restrictions
(whether public or private), or any judicial or administrative action by
adjacent landowners of natural or artificial conditions upon the Property or
Branch Lease Office which would prevent, limit, impede, or render more costly
the use of the Properties or Branch Lease Office as branch offices for a
savings and loan institution;

                          (n)     All utilities, including but not limited to
water, gas, sewer, electricity, and telephone service, are available to each of
the Locations at their respective boundary lines in sufficient quantifies to
conduct normal banking and office operations as PriMerit has heretofore
conducted them;

                          (o)     PriMerit has complied with all applicable
laws, ordinances, regulations, statutes, rules, and restrictions the failure to
comply with which may materially affect the Properties or the Branch Lease
Office, and the performance of this Agreement will not result in any breach of,
constitute any default under, or result in the imposition of, any lien or
encumbrance upon, the Locations, the Realty, or any of them, or upon any
agreement or other instrument to which PriMerit is a party, or by which
PriMerit, the Locations, the Realty or any of them, might be bound;

                          (p)     Each of the Properties and the Branch Lease
Office is covered by insurance maintained by PriMerit against fire, extended
coverage perils, and such other perils as are customarily insured against, in
amounts at least equal to the replacement costs of the improvements, furniture,
fixtures, and equipment thereon.  All amounts due and payable under such
insurance policies are fully paid, and all such insurance policies are, and
shall remain, in full force and effect until a date occurring not earlier than
the Closing Date;

                          (q)     The permits, licenses, and governmental
authorizations listed on Schedule F hereto are and shall remain through Closing
in full force and effect, and constitute all the permits, licenses, and
governmental authorizations necessary for the conduct of PriMerit's business on
the Realty;

                          (r)     The Branch Lease is in full force and effect
and contains the entire agreement between the parties thereto with respect to
the Branch Lease Office.  At 
<PAGE>   65
Closing PriMerit shall have fully satisfied all of its obligations under the 
Branch Lease which arise prior to the Closing.  PriMerit is not (and to 
PriMerit's Knowledge no other party is) in breach or violation of or default 
under the Branch Lease, and there is no valid basis for a claim of breach or 
violation of or default under, and no event has occurred that constitutes or, 
with the lapse of time or the giving of notice or both, would constitute, a 
breach, violation, or default by PriMerit (and to PriMerit's Knowledge any 
other party) under the Branch Lease.  PriMerit as lessee will, at Closing, 
have the right to quiet enjoyment under the Branch Lease;

                          (s)     No brokers, agents, or finders have been
consulted or hired by PriMerit with respect to this Agreement, the Purchase
Agreement, the transactions contemplated by either agreement;

                          (t)     Subject to PriMerit's covenants (i) to remedy
physical defects pursuant to Section 5.4 above, (ii) to restore the walls
pursuant to Section 8.4 below, and (iii) to restore the premises upon removal
of Fixed Assets pursuant to Section 8.7 of the Purchase Agreement, PriMerit
disclaims any and all warranties, express or implied, with respect to the
physical condition of the buildings and improvements situated at the Locations;
and

                          (u)     PriMerit has good and marketable title to the
tenant's leasehold estate under the Camelback Lease, free and clear of all
covenants, restrictions, easements, burdens, and liens and subject only to: (i)
the Permitted Exceptions, (ii) zoning, set back, building and other similar
restrictions which are not violated in any material respect and which do not
and will not, in World's opinion, have an adverse effect on use of the
Camelback Office for retail banking purposes, and (iii) the PriMerit/Camelback
Mortgage. The premises demised to PriMerit under the Camelback Lease are all
the real property and improvements used by PriMerit for or in connection with
the operation of its Camelback branch location.  The Camelback Office has been
classified by the applicable zoning authority in the zoning classification set
forth in Schedule E with respect thereto.  The property tax parcel numbers set
forth in Schedule E are the only tax parcel numbers assigned to the premises
demised under the Camelback Lease and said numbers include no other property.
PriMerit is in exclusive possession of the Camelback Office and the Camelback
Office is not subject to any sublease, license, or other occupancy agreement.
The Camelback Lease is in good standing and full force and effect and the
Camelback Lease together with the PriMerit/Camelback Mortgage and the note
secured thereby collectively contain the entire agreement between the parties
thereto with respect to the subject matter thereof.  Neither party to the
Camelback Lease is in default thereunder and no event has occurred nor action
been taken which, with the giving of notice, the passage of time, or both,
would constitute a default by either party thereunder.  There are no
condemnation or eminent domain actions pending or threatened which affect the
Camelback Office.  PriMerit has no existing defenses to or offsets against its
obligations under the Camelback Lease and to PriMerit's Knowledge, the lessor
under the Camelback Lease has no existing defenses to or offsets against her
obligations thereunder.
<PAGE>   66
                                  ARTICLE VIII

                         EXPRESS COVENANTS OF PRIMERIT

                 8.1      Between the date hereof and the Closing, PriMerit
expressly covenants and agrees that:

                          (a)     PriMerit shall use the Locations only in the
regular course of PriMerit's business, shall not commit waste thereof or
thereon and shall not make or consent to any alterations at any Location;

                          (b)     PriMerit shall give to World immediate
written notice of the commencement of or receipt of notice of any litigation or
threatened litigation affecting PriMerit, the Locations, the Camelback
Leasehold Estate, or the Branch Leasehold Estate which might in any way
constitute or have the effect of presently or in the future creating a lien,
claim, or obligation of any kind against the Properties, the Branch Leasehold
Estate, the Camelback Leasehold Estate, or any of them;

                          (c)     PriMerit shall give World immediate notice
upon the occurrence of any event, or receipt of any notice, which might give
rise to a breach by PriMerit of any of its representations or warranties set
forth in Article VII above; and

                          (d)     PriMerit shall take all steps necessary to
cause PriMerit Investor Services to (i) terminate the PIS Leases, with regard
to each of the Locations, and (ii) immediately discontinue the business of
PriMerit Investor Services at each of the Locations.

                 8.2      Use of Proceeds.  In the event of any loss or damage
to any of the Locations between the date hereof and Closing, (i) no insurance
claim for any such loss or damage shall be settled by PriMerit without the
written consent of World, and the proceeds of any such insurance claim shall be
applied only as World and PriMerit shall, in good faith, agree, and any and all
insurance proceeds and rights to proceeds remaining at Closing shall be
transferred and assigned to World at Closing (or there shall be a corresponding
reduction in the Purchase Price); and (ii) World shall have the right to accept
the affected Realty with the Purchase Price reduced by an amount sufficient to
compensate World for the reduction in the value thereof caused by such insured
loss or damage, as determined by an engineer or other appropriately licensed
professional or contractor selected by World; provided, however, that each
party agrees to use its good faith efforts to return any Location which has
suffered loss or damage to an operable condition as soon as practicable.  World
shall be entitled to exclude such damaged Location with a reduction to the
Purchase Price equal to the Net Book Value of such excluded Property.

                 8.3      Leases.  Prior to the scheduled Closing Date and not
later than the respective deadlines indicated below:

                          (a)     PriMerit shall not (i) amend, alter, renew,
terminate, or exercise any option to extend the term of the Branch Lease or the
Camelback Lease or (ii) sublease 
<PAGE>   67
or lease any space at any Property, the Branch Lease Office or the Camelback 
Office, without World's prior written consent in each case, which may be
granted or withheld by World in its sole and absolute discretion;

                          (b)     PriMerit shall promptly notify the landlord
under the Branch Lease Office of the anticipated assignment of the Branch
Lease, and shall request that such party cooperate with PriMerit and World with
respect to the execution of any necessary consents, the replacement of signage,
and all other matters connected with such assignment. PriMerit shall within
five days following the date of this Agreement request, and shall use its best
efforts to deliver to World, on or before the respective dates specified for
delivery below, the following:

                          (i)     not later than twenty (20) days prior to the
                          scheduled Closing Date, a Lessor's Estoppel
                          Certificate with respect to the Branch Lease from the
                          landlord thereunder, executed not more than thirty
                          (30) days prior to the Closing Date, in the form
                          attached hereto as Exhibit B and acceptable to World;

                          (ii)    not later than ten (10) days prior to the
                          scheduled Closing Date an executed and effective
                          Agreement and Consent from the landlord substantially
                          in the form attached hereto as Exhibit C with respect
                          to the assignment of the Branch Lease;

                          (iii)   not later than ten (10) days prior to the
                          scheduled Closing Date a fully executed and duly
                          acknowledged recordable memorandum or short form of
                          the Branch Lease made by PriMerit and the landlord
                          thereunder in the form required by Arizona Statutes
                          and which satisfies all requirements with respect
                          thereto for the issuance of the Title Policy for the
                          Branch Leasehold Estate;

                          (iv)    not later than ten (10) days prior to the
                          scheduled Closing Date, a nondisturbance certificate,
                          which shall be substantially in the form attached
                          hereto as Exhibit D and shall be dated not earlier
                          than thirty (30) days prior to the Closing Date, from
                          each and every holder of a mortgage on fee title to
                          the Branch Lease Office (collectively, the "Branch
                          Fee Mortgages");

                          (v)     not later than twenty (20) days prior to the
                          scheduled Closing Date written agreements acceptable
                          to World made by PriMerit and the tenants under the
                          PIS Leases terminating the PIS Leases effective upon
                          or prior to the Closing Date; and

                          (vi)    not later than the Closing Date, a
                          nondisturbance, recognition and attornment agreement
                          and consent to the Camelback Sublease executed by
                          Ruth Watanabe (individually and as trustee of the
                          Ruth K. Watanabe Trust) as landlord under the
                          Camelback Lease and under 
<PAGE>   68
                          such other documents in respect of the 
                          Watanabe/Camelback Agreements as are required by 
                          World, in a form acceptable to World. If such 
                          agreement and consent shall be delivered, World shall 
                          reimburse PriMerit at Closing for fifty percent (50%) 
                          of amounts paid by PriMerit to Ruth Watanabe in
                          consideration for such agreement and consent up to a
                          maximum reimbursement of Fifty Thousand Dollars
                          ($50,000).  PriMerit shall consult with World before
                          taking any action in respect of such agreement and
                          consent;

                          (c)     PriMerit shall, in a timely manner that will
                          allow PriMerit to deliver the commitments described
                          in 5.1, obtain and cause recordation of any and all
                          memoranda of leases and/or other documents required
                          by the Title Company to issue the Title Policies; and

                          (d)     Not later than ten (10) days prior to
                          Closing, PriMerit and World shall have agreed upon
                          the form of the Camelback Sublease, (i) having as the
                          base rent payable thereunder the "Base Rent" payable
                          under Section 1.5 of the Camelback Lease (which base
                          rent shall be payable at World's election directly to
                          the lessor under the Camelback Lease), (ii)
                          obligating World to pay amounts payable by the tenant
                          under Article 10 of the Camelback Lease, (iii) making
                          the expenses and costs of the day-to-day operation,
                          maintenance, and repair of the Camelback Branch
                          Office the responsibility of World, and (iv)
                          containing other terms and conditions mutually
                          acceptable to World and PriMerit which are
                          commercially reasonable in a sublease between
                          unrelated parties for free-standing office buildings
                          in the metropolitan Phoenix, Arizona area which terms
                          do not take into account the extent of PriMerit's
                          obligations as the tenant under the Camelback Lease.

                 8.4      Signs.  PriMerit shall remove any and all signs
attached to buildings at the Locations, and shall restore the walls to which
such signs are attached to their condition prior to attachment of such sign,
wear and tear excepted.


                                   ARTICLE IX

                  CONDITIONS PRECEDENT TO WORLD'S PERFORMANCE

                 9.1      Performance of PriMerit's Obligations.  World's
obligations hereunder shall be conditioned upon the timely performance by
PriMerit of each of the following items:

                          (a)     Title Commitments.  PriMerit shall have
delivered to World the Title Commitments, in the form specified in Section 4.2
hereof and within the time period specified in Section 5.1 hereof, together
with legible copies of all documents that affect title to the Realty;
<PAGE>   69
                          (b)     Surveys.  PriMerit shall have delivered to
World the Initial and Updated Surveys, in the form and within the time periods
specified in Section 5.2 hereof;

                          (c)     Title Curative.  PriMerit shall have cured,
to World's satisfaction (or World shall have otherwise waived) within the time
periods specified in Sections 5.1 and 5.2 hereof, all of the Title Defects;

                          (d)     Title Insurance.  PriMerit shall have
satisfied all requirements for the issuance of the Title Policies, including
but not limited to payment of all premiums for standard title coverage and
other charges in connection therewith;

                          (e)     Warranties and Covenants.  Each of PriMerit's
warranties and representations set forth in Article VII hereof and in the
Purchase Agreement are and shall be true as of the date of execution of this
Agreement and as of Closing, and as of Closing PriMerit shall have performed
all its covenants and delivered all the documents required by this Agreement;

                          (f)     Purchase Agreement.  Closing under the
Purchase Agreement shall take place concurrently with Closing under this
Agreement; and

                          (g)     Closing Deliveries.  PriMerit shall have
delivered at or prior to Closing each of the documents or other items required
under Sections 8.3, 9.1 and 10.2 hereof, and shall have performed all its other
obligations under Article X hereof.


                                   ARTICLE X

                                    CLOSING

                 10.1     Date and Place of Closing.  The Closing hereunder
shall take place in the offices of World at 1901 Harrison Street, Oakland,
California on July 31, 1993, provided that such date may be extended to a date
on or before December 31, 1993 and provided, further, that such Closing Date
shall be concurrent with the Closing Date set forth in the Purchase Agreement.

                 10.2     Items to be Delivered at the Closing.

                          (a)     PriMerit.  At the Closing, PriMerit shall
deliver to World or its assignees:

                                  (i)      the Title Policies, in the form
                                  specified in Section 4.2 hereof (the costs of
                                  which shall be borne by the parties as
                                  provided in Section 10.5 hereof);

                                  (ii)     separate Warranty Deeds for the
                                  Properties, duly executed and acknowledged by
                                  PriMerit, conveying title to each 
<PAGE>   70
                                  of the Properties to World subject only to 
                                  the Permitted Exceptions;

                                  (iii)    an executed and duly acknowledged
                                  Assignment and Assumption Agreement with
                                  respect to the Branch Lease in the form
                                  attached hereto as Exhibit E, together with a
                                  recordable memorandum or short form thereof
                                  in the form required by Arizona statutes and
                                  which satisfies all requirements with respect
                                  thereto for the issuance of the Title Policy
                                  for the Branch Leasehold Estate and which is
                                  otherwise reasonably acceptable to PriMerit
                                  and World;

                                  (iv)     so many copies as are reasonably
                                  required, of an affidavit executed by
                                  PriMerit satisfactory to evidence that World
                                  will not be required to withhold any tax and
                                  that no withholding liability exists as of
                                  the Closing under Section 1445 of the
                                  Internal Revenue Code (and the implementing
                                  regulations), which affidavit shall state
                                  that PriMerit is not a foreign corporation,
                                  foreign partnership, foreign trust, or
                                  foreign estate (as those terms are defined in
                                  the Internal Revenue Code and income tax
                                  regulations), PriMerit's employer
                                  identification number, and PriMerit's office
                                  address, plus such other statements as World
                                  shall reasonably request;

                                  (v)      so many copies as are reasonably
                                  required of certificates from the Secretaries
                                  or Assistant Secretaries of PriMerit as to
                                  the incumbency and signatures of officers;

                                  (vi)     so many copies as are reasonably
                                  required of all affidavits, certificates, and
                                  other statements necessary for the issuance
                                  of the Title Policies at Closing;

                                  (vii)    so many copies as are reasonably
                                  required of any and all additional documents
                                  and instruments which World may reasonably
                                  determine are necessary or desirable for the
                                  proper consummation of this transaction;

                                  (viii)   the Camelback Sublease and a
                                  nondisturbance, recognition and attornment
                                  Agreement made between PriMerit as mortgagee
                                  or sole beneficiary under the
                                  PriMerit/Camelback Mortgage and World, in
                                  form acceptable to World and PriMerit; and

                                  (ix)     the nondisturbance, recognition and
                                  attornment agreement and consent described in
                                  Section 8.3(b)(vi); provided, however, that
                                  if PriMerit's failure to deliver such
<PAGE>   71
                                  agreement and consent is not a result of
                                  PriMerit's breach of its obligations under
                                  this Agreement, World's rights in respect of
                                  the nondelivery of such agreement and consent
                                  shall be as set forth in Section 11.3 below,
                                  and provided that if PriMerit's failure to
                                  deliver such consent and agreement is a
                                  result of PriMerit's breach of its
                                  obligations under this Agreement, then World
                                  shall have all rights and remedies in respect
                                  of such breach.

                          (b)     World.  At the Closing, World shall deliver
to PriMerit each of the following items:

                                  (i)      the total Purchase Price;

                                  (ii)     the Camelback Sublease, the
                                  nondisturbance, recognition and attornment
                                  agreement described in 10.2(a)(viii) above,
                                  the Assignment and Assumption Agreement with
                                  respect to the Branch Lease described in
                                  10.2(a)(iii) and the memorandum or short form
                                  thereof therein described;

                                  (iii)    so many copies as are reasonably
                                  required of certificates from the Secretaries
                                  or Assistant Secretaries of World as to the
                                  incumbency and signatures of officers; and

                                  (iv)     so many copies as are reasonably
                                  required of any and all additional documents
                                  and instruments which PriMerit may reasonably
                                  determine are necessary or desirable for the
                                  proper consummation of this transaction.

                 10.3     Adjustments.  At the Closing, ad valorera taxes
relating to the Properties and the Camelback Office and any personal property
taxes relating to or including ad valorera taxes for the Locations for the
calendar year in which the Closing Date occurs shall be prorated between
PriMerit and World as of the Closing Date, based upon the best available
estimates of the amount of taxes that will be due and payable on each of the
Properties during the calendar year in which the Closing Date occurs, and
PriMerit shall pay to World in cash at the Closing, or credit against the
Purchase Price, PriMerit's pro-rata portion of such taxes.  All rental amounts
payable under the Branch Lease shall be prorated as of Closing and all
adjustments under the Branch lease shall be made at Closing.  Within thirty
(30) days after the date the total aggregate amount of taxes on the Properties
for such year is known, PriMerit and World shall readjust the amount of taxes
to be paid by each party and any excess paid by PriMerit shall be refunded by
World, and any shortage in the amount paid by PriMerit shall be paid by
PriMerit to World.

                 10.4     Possession and Closing.  Possession of each of the
Properties, the Branch Lease Office and the Camelback Office shall be delivered
to World by PriMerit at Closing.
<PAGE>   72
                 10.5     Costs of Closing.

                          (a)     PriMerit agrees to pay:

                                  (i)      All state and local taxes and
                                  deed-transfer charges arising out of the
                                  conveyances contemplated hereby and in
                                  respect of the Camelback Sublease;

                                  (ii)     All charges incurred by PriMerit for
                                  the procurement, preparation, and recording
                                  of any releases, waivers, or other
                                  instruments required to clear PriMerit's
                                  title to the Properties;

                                  (iii)    The premium for issuance of standard
                                  coverage under the Title Policies required
                                  under Section 4.2 and the cost, if any, of
                                  the Title Commitments;

                                  (iv)     One-half of the cost of the Surveys;

                                  (v)      Any and all brokers', agents',
                                  finders', and attorneys' fees it may incur in
                                  connection with this Agreement, except as
                                  provided in (b) below.

                          (b)     World agrees to pay any and all brokers',
agents', and finders' fees payable to third parties claiming to have dealt
solely through World with respect to this Agreement, one-half of the cost of
the Surveys, its own attorney's fees and the premium in excess of the premium
for standard title coverage payable for the issuance of extended title coverage
under the Title Policies.  World shall have the benefit of any developer
discount applicable to the Title Policies.

                          (c)     Any escrow and recording fees charged by the
Title Company pursuant hereto, and all other costs, fees, penalties, and other
expenses incurred at the Closing shall


                                   ARTICLE XI

                             DEFAULTS AND REMEDIES

                 11.1     PriMerit's Defaults;  World's Remedies.

                          (a)     PriMerit's Defaults.  PriMerit shall be in
default hereunder if PriMerit shall fail timely and fully to meet, comply with,
or perform any material warranty, representation, covenant, agreement, or
obligation on its part required under this Agreement;

                          (b)     World's Remedies.  In the event PriMerit is
in default 
<PAGE>   73
hereunder, World, at World's option, (i) shall be entitled to terminate this 
Agreement and the Purchase Agreement by delivery of written notice to PriMerit, 
(ii) subject to PriMerit's right to terminate under Section 5.9, shall be 
entitled to exclude the Locations in connection with which defaults shall arise 
and reduce the Purchase Price, if one or more Properties is excluded, by the 
Net Book Values of such excluded Properties, or (iii) may pursue any and all of 
World's remedies at law or in equity, including the enforcement by specific 
performance of this Agreement; and

                          (c)     Specific Performance.  PriMerit acknowledges
that World will be irreparably harmed and will have no adequate remedy at law
if PriMerit fails to perform any of its material obligations under this
Agreement.  It is accordingly agreed that, in addition to any other remedies
which may be available to it, World shall have the right to obtain specific
performance of PriMerit's covenants and other agreements contained in the
Agreement and such other equitable relief as the court shall deem appropriate.

                 11.2     World's Defaults: PriMerit's Remedies.

                          (a)     World's Default.  World shall be in default
hereunder if World shall fail to meet, comply with or perform any material
covenant, agreement, or obligation on its part required under this agreement;
and

                          (b)     PriMerit's Remedy.  In the event World is in
default hereunder, PriMerit may, as its sole and exclusive remedy, terminate
this Agreement and recover any amounts reasonably paid to World or any third
party pursuant to this agreement.  PriMerit hereby irrevocably waives and
releases any and all claims for, rights to, and causes of action for specific
performance of this Agreement and each of the transactions contemplated hereby.

                 11.3     In the event that, for any reason, the parties hereto
fail to enter into the mutually acceptable sublease in respect of the Camelback
Office described in Section 8.3(d) above as required by Sections 10.2(a)(viii)
and 10.2(b)(ii) or the nondisturbance, recognition, and attornment agreement
and consent to the Camelback Sublease between PriMerit and World is not made
and delivered as required by Section 10.2(a)(viii) or if the nondisturbance,
recognition, attornment and consent agreement required by Section 8.3(b)(vi)
above is not timely delivered and such failure of timely delivery of such
agreement and consent is not a result of PriMerit's breach of its obligations
under this agreement, World in any of such events, at Worlld's option, may
elect to exclude the Camelback Office from the transaction which is the subject
of this Agreement and upon such exclusion the parties shall be relieved from
all further obligations under this agreement in respect of the Camelback Office
and the Camelback Lease.

                 11.4     Pursuit of Remedies.  In the event World elects to
pursue one of the remedies under Section 11.1 hereof and at any time during
pursuit of performance thereunder elects not to seek such remedy, World shall
be entitled to pursue its other remedies under Section 11.1.
<PAGE>   74
                                  ARTICLE XII

                            ENVIRONMENTAL INDEMNITY

                 12.1     Release of World.  PriMerit, on behalf of itself and
its successors and assigns does hereby release World and the directors,
trustees, beneficiaries, officers, shareholders, employees and agents of World,
and any successor or assign of each and every one them ("World's Related
Parties"), and waives any rights or claims under any Environmental Laws against
World and World's Related Parties for or resulting from the presence or Release
at, on, about, adjacent to, under, within, or from any of the Locations or any
waste disposal site used by any of the Locations, of any Hazardous Substances
on or prior to the Closing Date or remaining at, on, about, adjacent to, under,
within, or from any of the Locations after the Closing Date, provided that the
foregoing release and waiver shall not apply to the extent that World or
World's Related Parties cause or contribute to the Release of such Hazardous
Substances.

                 12.2     PriMerit's Environmental Indemnification.  PriMerit
and its successors and assigns shall indemnify, defend, and hold World and
World's Related Parties harmless from and against all claims, liabilities,
obligations, damages (including any damages to third parties), fines,
penalties, judgments, costs, reasonable attorney's and consultant's fees
resulting from, arising under, or imposed by any Environmental Law by reason of
the Release of a Hazardous Substance at, on, about, adjacent to, under, within,
or from any of the Locations or any waste disposal site used by any of the
Locations which (i) occurs before the Closing Date or, (ii) occurs at any time
to the extent attributable to the presence or Release of any Hazardous
Substance prior to the Closing Date, ("World's Environmental Claims"), subject
to the following conditions and limitations:

                          (a)     The following shall be excluded from
PriMerit's Environmental Indemnification and World's Environmental Claim: (i)
special or consequential damages to World, including, without limitation, loss
of revenues, income, profits, punitive damages, and the like, (ii)
environmental conditions resulting solely from the acts of Word or World's
Related Parties including, without limitation, the Release of a Hazardous
Substance at, on, about, adjacent to, under, within, or from any of the
Locations after the Closing Date; and

                          (b)     An express condition precedent to World's
rights under PriMerit's Environmental Indemnification shall be that World must
present to PriMerit, within four (4) years after the Closing Date, a written
assertion of World's Environmental Claim.

                 12.3     World's Environmental Indemnification.  World, its
successors and assigns, shall indemnify, defend, and hold PriMerit and
PriMerit's directors, trustees, beneficiaries, officers, shareholders,
employees, and agents, and any successor and assign of each and every one
("PriMerit's Related Parties") harmless after the Closing Date from and against
all claims, liabilities, obligations, damages (including any damages to third
parties), fines, penalties, judgments, costs, reasonable attorney's and
consultant's fees arising under, or imposed by, any Environmental Law by reason
of the Release of a Hazardous Substance, 
<PAGE>   75
at, on, about, adjacent to, under, within, or from any of the Locations solely 
to the extent attributable to the conduct of World or World's Related Parties 
which occurs after the Closing Date ("PriMerit's Environmental Claim"), subject 
to the following conditions and limitations:

                          (a)     The following shall be excluded from World's
Environmental Indemnification and PriMerit's Environmental Claim: (i) special
or consequential damages to PriMerit including, without limitation, loss of
revenues, income, profits, and the like, or punitive damages, (ii)
environmental conditions resulting from the acts of PriMerit or PriMerit's
Related Parties including, without limitation, the Release of a Hazardous
Substance at, on, about, adjacent to, under, within, or from any of the
Locations either before or after the Closing Date; and

                          (b)     An express condition precedent to PriMerit's
rights under World's Environmental Indemnification shall be that PriMerit must
present to World, within four (4) years after the Closing Date, a written
assertion of PriMerit's Environmental Claim.


                                  ARTICLE III

                                 MISCELLANEOUS

                 13.1     Captions.  The captions, headings and arrangements
used in this Agreement are for convenience only and do not in any way affect,
limit, amplify, or modify the terms and provisions hereof.

                 13.2     Number and Gender of Words.  Use of the singular
number herein shall include, where appropriate, the plural, and words of any
gender shall include, where appropriate, the other gender.

                 13.3     Notices.  Notices, demands, requests, and other
communications required or permitted hereunder shah be deemed to be received
(i) immediately upon receipt or refusal by hand by the party to whom such
notice is addressed, (ii) on the date of delivery by a reputable parcel
delivery service to the addressee as set forth below and evidenced by a receipt
therefor, (iii) three (3) business days after mailing via U.S. Mail, certified,
with a return receipt requested, and addressed as set forth below or in such
manner as the party to whom such notice is sent has last advised the other
party hereto.

                 If to PriMerit:  PriMerit Bank, FSB
                                  3300 West Sahara Avenue
                                  Las Vegas, Nevada
                                  Attention:  Dan J. Cheever, President
<PAGE>   76
                 If to World:     J. L. Helvey
                                  Group Senior Vice President
                                  World Savings and Loan Association
                                  1901 Harrison Street
                                  Oakland, California 94612

                 With a copy to:  Fried, Frank, Harris, Shriver & Jacobson
                                  1001 Pennsylvania Avenue, N.W.
                                  Suite 800
                                  Washington, D.C. 20004-2505
                                  Attention:  David L. Ansell, Esq.

                 13.4     Governing Law.  This Agreement, together with the
Purchase Agreement and the Consulting Agreement and Non-Competition Agreement
among the parties hereto and Southwest Gas, a California corporation of even
date herewith (the "Ancillary Agreements") govern the parties rights and
liabilities in a single, integrated transaction.  As with the Purchase
Agreement, the validity, performance, and enforcement of this Agreement and
agreements contemplated hereby shall be governed by the laws of the State of
California, without giving effect to the principles of conflicts of law
thereof, except that (i) with respect to matters regarding title to real
property, the laws of the State of Arizona shall govern, without giving effect
to the principles of conflicts of law thereof, and (ii) with respect to matters
regarding the transfer of right, title to, and interest in any contract,
agreement, instrument, or governmental authorization, the laws governing such
contract, agreement, instrument, or governmental authorization shall govern.
Each of the parties hereto hereby irrevocably and unconditionally consents to
the exclusive jurisdiction of the courts of the State of California located in
the County of Alameda and of the United States of America in and for the
Northern District of California, which courts shall have exclusive jurisdiction
over the interpretation and enforcement of this Agreement, the Purchase
Agreement, and the Ancillary Agreements, and the parties hereto agree that
venue for all action for any actions, suits, or proceedings arising out of or
relating to this Agreement, the Purchase Agreement, the Ancillary Agreements
and the transactions contemplated by each of them shall be proper in any such
court.

                 13.5     Entirety and Amendments.  This Agreement and the
documents referred to herein embody the entire agreement between the parties
with respect to the subject matter hereof and supersede all prior agreements
and understandings between World and PriMerit, if any, relating to the Realty
and the Locations and the Camelback Lease and may be amended or supplemented
only by an instrument in writing executed by the party against whom enforcement
is sought.

                 13.6     Invalid Provisions.  If any provision of this
Agreement is held to be void or unenforceable by a court of competent
jurisdiction, such provision shall be severable and the remaining provisions of
this Agreement shall remain in full force and effect and shall not be affected
by the void or unenforceable provision or by its severance.  Furthermore, in
lieu of such void or unenforceable provision, there shall be automatically
substituted a provision as similar in effect to such provision as may be legal,
valid, and enforceable.
<PAGE>   77
                 13.7     Multiple Counterparts.  This Agreement may be
executed in identical counterparts, each of which shall be deemed an original
for all purposes and all such counterparts shall, collectively, constitute one
agreement.

                 13.8     Parties Bound.  This Agreement shall be binding upon
and inure to the benefit of PriMerit and World and their respective heirs,
representatives, successors, and assigns.

                 13.9     Risk of Loss.  Risk of loss or damage by fire or
other casualty to the Properties or any part thereof prior to Closing shall be
the risk of PriMerit.  Improvements and personal property described herein
shall be maintained by PriMerit in the present condition until Closing, wear
from normal and reasonable use and deterioration excepted.

                 13.10    Further Acts.  In addition to the acts and deeds
recited herein and contemplated to be performed, executed, or delivered by
PriMerit to World, PriMerit and World each agree to perform, execute, and
deliver or cause to be performed, executed, and delivered at the Closing or
after the Closing any and all such further acts, deeds, and assurances as the
other party may reasonably request to consummate the transactions contemplated
hereby and to assure World's title to the Realty.

                 13.11    Time of the Essence.  It is expressly agreed by the
parties hereto that time is of the essence with respect to this Agreement.  If
the final day of any periods or any date of performance under this Agreement
falls on a Saturday, Sunday or legal holiday, then the final day of said period
or the date of performance shall be extended to the next business day
thereafter.

                 13.12    Survival.  All covenants and agreements contained
herein and intended to be performed subsequent to any Closing hereunder shall
survive the execution and delivery of the Deed and other closing documents
required hereby and shall specifically be deemed not to be merged into or
waived by any instrument of Closing, but shall expressly survive and be binding
upon PriMerit and World.  All indemnities by PriMerit and any liability of
PriMerit for misrepresentation or breach of warranty contained herein shall
survive the execution and delivery of the Warranty Deed(s) and other closing
documents required hereby, shall specifically be deemed not to be merged into
or waived by any instrument of Closing, and such liability shall expressly
survive and be binding upon PriMerit.
<PAGE>   78
                 EXECUTED as hereinafter set forth.

                                    PriMerit:

                                    PRIMERIT BANK FSB

         August 12, 1993
- ---------------------------------
    Date Executed by PriMerit       By:_______________________________________


                                    Name:_____________________________________

                                    Title:____________________________________



                                    World:

                                    WORLD SAVINGS AND LOAN ASSOCIATION, a
                                    Federal Savings and Loan Association


         August 12, 1993
- --------------------------------
Date Executed By World              By:_______________________________________

                                    Name:_____________________________________

                                    Title:____________________________________
<PAGE>   79
                                   Schedule A
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                         [Section 1.1 (p) and 7.1 (a)]


                                   Properties

                 [Legal Descriptions of parcels to be attached]


<TABLE>
<CAPTION>
Property         Common Branch Name
<S>              <C>
  I              Fiesta Mall
 II              Power and Broadway
III              Scottsdale
 IV              Sun City West
</TABLE>
<PAGE>   80
                                   PROPERTY I


A portion of the Southwest quarter of the Northwest quarter of the Northwest
quarter of Section 33, Township 1 North, Range 5 East of the Gila and Salt
River Base and Meridian, Maricopa County, Arizona, more particularly described
as follows:

Commencing at the Northwest corner of said Section 33; thence South 1 degree 00
minutes 05 seconds West a distance of 660.69 feet to the Northwest corner of
the Southwest quarter of the Northwest quarter of the Northwest quarter of said
Section 33; thence South 89 degrees 05 minutes 47 seconds East along the North
line of the aforementioned Southwest quarter 67.00 feet to a point on the East
right-of-way line of ALMA SCHOOL ROAD and the POINT OF BEGINNING; thence North
89 degrees 05 minutes 47 seconds East a distance of 185.13 feet; thence South 1
degree 05 minutes 49 seconds West a distance of 155.22 feet to a point on the
Northerly right-of-way line of GROVE AVENUE, said point being on a non-tangent
curve; thence Northwesterly along said curve, being along the Northerly
right-of-way line of GROVE AVENUE; said curve being concave Southwesterly,
having a cord bearing of North 73 degrees 20 minutes. 07 seconds West, a cord
length of 170.03 feet, a radius of 430.56 feet, through an arc length of 171.16
feet; thence North 43 degrees 59 minutes 39 seconds West a distance of 29.78
feet to a point on the Easterly right-of-way line of ALMA SCHOOL ROAD; thence
North 1 degree 00 minutes 21 seconds East a distance of 82.10 feet to the POINT
OF BEGINNING.
<PAGE>   81
                                  PROPERTY II


PARCEL NO. 1:

Lot 4, of COOPER VILLAGE, according to the plat of record in the office of the
County Recorder of Maricopa County, Arizona, recorded in Book 317 of Maps, Page
6 and Affidavit of Correction of Plat Dedication and Re-Dedication recorded in
88-635699, of Official Records.

PARCEL NO. 2:

A non-exclusive easement for ingress, egress, parking, pedestrian traffic and
utilities as more fully set forth in Paragraph 7 of Declaration of Easements
Covenants and Restrictions recorded in 87-505615, of Official Records and First
Amendment recorded in 87-766146, of official Records, records of Maricopa
County, Arizona.


                                  PROPERTY III

PARCEL NO. 1:

A parcel of land located in the Northwest quarter of the Northeast quarter of
Section 27, Township 3 North, Range 4 East of the Gila and Salt River Base and
Meridian, Maricopa County, Arizona, being more particularly described as
follows:
<PAGE>   82
                                  PROPERTY IV


PARCEL NO. 1:

A part of Tract O, of SUN CITY WEST UNIT 1, according to the plat of record in
the office of the County Recorder of Maricopa County, Arizona, recorded in Book
200 of Maps, Page 1, more fully described as follows:

COMMENCING at the most Westerly corner of Tract O, also known as the
Southeasterly corner of Tract N and the Northeasterly right-of-way line of R.
H. JOHNSON BOULEVARD; thence Southeasterly along the said right-of-way line and
the arc of a curve concave Southwesterly and having a radius of 10,055.00 feet
and a central angle of 02 degrees 34 minutes 00 seconds a distance of 450.45
feet to a point on a non-tangent line and the TRUE POINT OF BEGINNING; thence
North 42 degrees 48 minutes 09 seconds East, a distance of 180.12 feet to a
point on a non-tangent curve concave Southwesterly; thence Southeasterly along
the arc of said curve having a radius of 10,235.00 feet and a central angle of
01 degrees 00 minutes 09 seconds a distance of 179.08 feet to a point on a
non-tangent curve of CAMINO DEL SOL; thence along said right-of-way line and
along the arc of said curve concave Southeasterly and having a radius of
18,690.00 feet and a central angle of 00 degrees 04 minutes 54 seconds a
distance of 26.64 feet to a point of tangency; thence South 50 degrees 32
minutes 41 seconds West, a distance of 140.18 feet to a point on a tangent
curve concave Northwesterly and having a radius of 15.00 feet and a central
angle of 85 degrees 10 minutes 47 seconds; thence along the arc of said curve a
distance of 22.30 feet to a point of a reversing curve concave Southwesterly;
thence Northwesterly along the arc of said curve having a radius of 10,055..00
feet and a central angle of 0 degrees 48 minutes 11 seconds a distance of
140.92 feet, said curve also being the Northeasterly right-of-way line of R. H.
JOHNSON BOULEVARD to the TRUE POINT OF BEGINNING.

PARCEL NO. 2:

An easement for ingress and egress and parking over the driveways and parking
areas as set forth in Reciprocal Easement Agreement recorded in 88-414660, of
Official Records, records of Maricopa County, Arizona.
<PAGE>   83
                                   Schedule B
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                                 [Section 3.3]

                               Amount of Owner's
                                Title Insurance

PROPERTY

<TABLE>
<S>              <C>                               <C>
  I              (Fiesta Mall)                     $  880,335
 II              (Power and Broadway)              $  514,227
III              (Scottsdale)                      $  808,981
 IV              (Sun City West)                   $  618,529
</TABLE>

BRANCH LEASE                                       $  350,000

CAMELBACK                                          $1,500,000




                                   Schedule C
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                          [Section 1.1(a) and 7.1(a)]


Branch Lease

                 1.       Lease dated November 21, 1989 between Mariah
Properties, Ltd., an Arizona corporation, as landlord and PriMerit Bank as
tenant (commonly known as the Sun City Grand Branch). The named parties are the
current parties.
<PAGE>   84
                                   Schedule D
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                               [Section 7.1 (a)]

                                   PIS Leases
<PAGE>   85
                                   Schedule E
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                          [Section 7.1(a) and 7.1(u)]

                     Zoning Categories and Tax I.D. Numbers



Zoning Classification
and Zoning Authority              Tax I.D. Numbers

Properties

   I
  II
 III
  IV

Branch Lease
  Leasehold
  Estate

Camelback

<PAGE>   86
                                   Schedule F
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                                [Section 7.1(q)]

                                    Licenses
<PAGE>   87
                                   Schedule G

                              PERMITTED EXCEPTIONS


1.       With respect to the Property at 6750 East Broadway, Mesa, Arizona,
         that certain Declaration of Covenants, Conditions, Restrictions and
         Easements for Broadway Village Partners (Doc #87-505615) recorded
         8/11/87 as amended by the First Amendment to the Declaration (Doc#
         87-766146) recorded 12/30/87.

2.       With respect to the Property at 6929 East Shea Boulevard, Scottsdale,
         Arizona, that certain Reciprocal Easement Agreement (Doc #88- 390288)
         between Fountain Plaza and Nevada Savings and Loan Association
         recorded 8/8/88.

3.       With respect to the Property at 19001 R. H. Johnson, Sun City West,
         Arizona, the Covenants, Conditions and Restrictions in that certain
         Warranty Deed (Doc #86-722236) from Del Webb to Bade Boyes recorded
         12/30/86.

4.       With respect to the Property at 16059 Grand Avenue, Sun City, Arizona,
         the Covenants, Conditions and Restrictions contained in that certain
         Warranty Deed recorded 12/31/81 (Docket # 15736, page 1573), that
         certain Assignment of Rights Under Warranty Deed recorded 11/27/85
         (Doc # 85-567128), and that certain Consent to Amend Restrictive
         Covenant recorded 11/13/89 (Doc #89-522086).
<PAGE>   88
                                   Exhibit A
                  to Branch Purchase and Assumption Agreement
                         Between PriMerit Bank, FSB and
                       World Savings and Loan Association

                               [Section 1.1 (q)]

                         Form of General Warranty Deed


                       [Acceptable form to be supplied by
                           PriMerit's legal counsel]
<PAGE>   89
                                MARIAH/SUN CITY

                              EXHIBIT B  [8.3b(i)]


                         LESSOR'S ESTOPPEL CERTIFICATE

TO:      World Savings and Loan Association

RE:      Lease dated November 21, 1989 (the "Lease") between Mariah Properties,
         Ltd., an Arizona corporation, as lessor ("Lessor") and PriMerit Bank,
         FSB, as lessee ("Lessee") for certain premises ("Premises") located in
         King's Inn Center, Sun City, Maricopa County, Arizona


         The undersigned, as Lessor under the Lease, hereby certifies that, as
of the date hereof, the following is true and correct:

         1.    A complete and accurate copy of the Lease, including all riders,
addenda, amendments and/or other agreements made between Lessor and Lessee
relating to or in respect of the Premises, is attached hereto.

         2.    The Lease is in full force and effect, and contains the entire
agreement between Lessor and Lessee with respect to leasing of the Premises.
There are no oral agreements between Lessor and Lessee affecting or relating to
the Premises.

         3.    Lessee has fully satisfied all Lessee's obligations under the
Lease which have arisen or accrued prior to the date hereof. There exist no
uncured defaults in the performance of the Lease by either party, nor has any
event occurred or condition arisen which, with the passage of time, or the
giving of notice, or both, would constitute a default or breach under the Lease
by either party.

         4.    The Lease Term commenced ___________________________________ and
is scheduled to terminate ________________________________________.

         5.    All rent and other amounts payable by Lessee under the Lease up
to and including the date hereof, including amounts payable by Lessee to third
parties, have been fully paid
through___________________________________________.

         6.    The total base monthly rent currently paid by Lessee under the
               Lease is $_____________________________________________.

         7.    The total Security Deposit currently held by Lessor pursuant to
the Lease is $____________________________________________.  The Security
Deposit is held by Lessor at_________________.
<PAGE>   90
         8.   Rent has been prepaid by Lessee in the following amounts for the
following periods______________________________________.

         9.    Lessee's liability for costs and expenses related to the
Premises or the property of which the Premises are a part other than basic
monthly rent is as follows:

True of Expense  Lessee' s Share  Estimated Monthly Payment

         10.  Expenses set forth in paragraph 9 above constitute a complete
list of all amounts payable by Lessee to Lessor under the Lease.

         11.  Lessee has no options to purchase or rights of first refusal in
respect of the Lease, the Premises or the land of which the Premises form a
part, except as reflected in the Lease.  Lessee has not exercised any such
option or right of first refusal.

         12.  Lessee has no option to renew or extend the Lease except as set
forth in the Lease.  Lessee has not exercised any such option.

         13.  There are no condemnation or eminent domain actions pending or
threatened which affect the Premises, the parcel of land of which the Premises
are a part or access thereto.

         14.  All obligations of the parties under the Lease relating to the
construction or restoration of improvements have been fully satisfied and all
work has been accepted and approved by both parties.

         15.  Lessor has no existing defenses or offsets to the performance of
its obligations under the Lease.

         16.  World to supply additional language clarifying the meaning of
ambiguous provisions, etc. as necessary).

         The undersigned acknowledges that World Savings and Loan Association
will rely upon this Certificate in assuming Lessee's rights and obligations
under the Lease.

Dated:______________________________________, 1993

                                    LESSOR:

                                    MARIAH PROPERTIES, LTD., an Arizona 
                                    corporation



                                    By:_______________________________________

                                    Its:______________________________________
<PAGE>   91
                                MARIAH/SUN CITY


                            EXHIBIT C [8.3(b)(iii)]

                      AGREEMENT AND CONSENT TO ASSIGNMENT

                           [TO BE IN RECORDABLE FORM]


         The undersigned, Mariah Properties, Ltd., an Arizona corporation
("Consenting Party") as the "Lessor" under that certain Lease, dated November
21, 1989 (the "Lease") between the Consenting Party and PriMerit Bank, FSB as
"Lessee" thereunder (hereinafter called the "Assignor") for premises located in
King's Inn Center, Sun City, Maricopa County, Arizona (the "Premises") does
hereby consent to the assignment of the Assignor's interest in the Lease and
the Premises to WORLD SAVINGS AND LOAN ASSOCIATION (hereinafter called the
"Assignee").

         The undersigned agrees that Assignee may remove Assignor's signage and
install signage identifying Assignee's business at the demised premises which
is approximately the same size as Assignor's current signage without necessity
of further consent from, approval of or notice to Consenting Party.

         All statements made by the Consenting Party in Lessor's Estoppel
Certificate made by it dated _______________________, 1993 are true, complete
and unchanged as of the date hereof.

         The Lease as modified hereby is ratified and confirmed by the
Consenting Party.

         IN WITNESS WHEREOF, the undersigned has executed this Consent To
Assignment the__________ day of_________________________, 1993.


Dated:_______________________________________,  1993

                                    LESSOR:

                                    MARIAH PROPERTIES, LTD., an Arizona 
                                    corporation



                                    By:_______________________________________

                                    Its:______________________________________
<PAGE>   92
                                MARIAH/SUN CITY

                           EXHIBIT D [Section 8.3(e)]

             Non-Disturbance, Recognition and Attornment Agreement

                           [TO BE IN RECORDABLE FORM]


         THIS AGREEMENT made as of the__________ day of
_________________________,1993, among  __________________________ a
____________________ _____________ having an office at ____________________
("Mortgagee"), World Savings and Loan Association, a Federal Savings and Loan
Association ("World"), and Mariah Properties, Ltd., an Arizona corporation
("Mariah").

                                   WITNESSETH

         WHEREAS, on November 21, 1989, Mariah, as landlord, and PriMerit Bank,
as tenant ("PriMerit"), entered into that certain lease (the "Lease") for
premises known as A-1 and a part of A-2 in the King's Inn Center, Sun City,
Maricopa County, Arizona (the "Premises");

         WHEREAS, a Memorandum of the Lease was or shall be recorded in the
public records of Maricopa County, Arizona;

         WHEREAS, the Lease was or shall be assigned by PriMerit to World and a
Memorandum of such assignment was or shall be recorded in the public records of
Maricopa County;

         WHEREAS, Mortgagee is the present owner and holder of the mortgage
described in Schedule A attached hereto (said mortgage, as the same may be
amended, increased, renewed, modified, consolidated, replaced, combined,
substituted, severed, split, spread or extended, being hereinafter referred to
as the "Mortgage") which is a lien on the real property described in Schedule B
hereto (the "Real Property"), and of the note, bond or other obligation secured
by the Mortgage (the "Note").

         NOW, THEREFORE, for good and valuable consideration given each to the
other, receipt of which is hereby acknowledged, the parties hereby agree as
follows:

         1.    Provided the Lease is in full force and effect and World is not
in default of any material, monetary obligation under the Lease, if any action
or proceeding is commenced by Mortgagee for the foreclosure or other
enforcement of the Mortgage or the sale of the Real Property or any potion
thereof pursuant to such foreclosure or other enforcement, World shall not be
named or joined as a party defendant therein (unless required by law, in which
case World may be named only for the purpose of complying with said law but not
for the purpose of foreclosing World's interest) or otherwise in any suit or
action to terminate the Lease, and any foreclosure of the Mortgage and any sale
pursuant to any such 
<PAGE>   93
foreclosure, shall be subject to the Lease and the rights of World thereunder, 
and any successor to Mortgagee (whether as a mortgagee or as an owner of the 
Real Property) shall take its interest subject to the Lease and the rights of 
World thereunder. The possession of World shall in none of such events be 
disturbed nor shall the Lease be terminated or modified as a result thereof, 
except to the extent that upon succeeding to the interest of landlord under the 
Lease such successor would have such rights in accordance with the terms of the 
Lease, and Mortgagee shall recognize World as the direct tenant of Mortgagee 
upon all of the terms, covenants and conditions of the Lease.

         2.    If Mortgagee shall become the owner of the Real Property by
reason of the foreclosure of the Mortgage or the acceptance of a deed or
assignment in lieu of foreclosure, or if any other person shall purchase the
Real Property by reason of such foreclosure, the Lease shall not be terminated
or affected thereby but shall continue in full force and effect as a direct
lease between Mortgagee or such purchaser and World upon all of the terms,
covenants and conditions set forth in the Lease and in that event World with
respect to the Lease agrees to fully and completely attorn to and recognize
Mortgagee or such purchaser as landlord under the Lease, and Mortgagee or such
purchaser shall accept such attornment of World and World shall thereafter
fully and faithfully perform, from and after such date on which Mortgagee or
such purchaser become such owner, each and every undertaking to be performed on
the part of tenant under the Lease in accordance with the provisions thereof
for the benefit of Mortgagee, and Mortgagee or such purchaser shall thereafter
fully and faithfully perform each and every undertaking under the Lease to be
performed on the part of landlord under the Lease in accordance with the
provisions thereof for the benefit of World.  The provisions of this Paragraph
2 shall be self operative without the execution of any further instruments;
provided, however, that upon demand of Mortgagee or such purchaser World
agrees, and upon demand of World Mortgagee and such purchaser agree, to execute
and deliver from time to time instruments in recordable form to evidence and
confirm the foregoing provisions of this Paragraph 3 reasonably satisfactory to
both parties, acknowledging such attornment and setting forth the terms and
conditions of the tenancy.

         3.    All notices, consents and other communications pursuant to the
provisions of this Agreement shall be in writing and shall be sent by receipted
courier or receipted overnight delivery, prepaid, addressed as follows:

                 If to Mortgagee:

                 __________________________

                 __________________________

                 __________________________

                 __________________________
<PAGE>   94
                 If to World:

                 World Savings and Loan Association
                 1901 Harrison Street
                 Oakland, CA 94612
                 Attention:  Mr. Daniel R. Dixon

                 If to Mariah:

                 165 North Central Way
                 Suite 208
                 Mesa, Arizona 85201

         All notices, consents or other communications shall be deemed given on
the date they are delivered (or deemed delivered as hereinafter set forth).
Each party may designate a change of address by notice to the other party. The
inability to deliver any such notice, consent or other communication because of
changed address of which no notice was given, or rejection or refusal to accept
any such notice, consent or other communication, shall be deemed to be receipt
of the same as of the date of such inability to deliver or rejection or refusal
to accept delivery.

         4.    This Agreement shall be binding upon and inure to the benefit of
Mortgagee, Mariah and World, and their respective successors and assigns
hereunder.

         5.    The terms "World" and "Mariah" as used herein shall mean World
and Mariah, respectively, and any of their respective successors and assigns in
interest under the Lease.

         6.    This Agreement may not be modified in any manner or terminated
except by an instrument in writing executed by the parties hereto.

         7.    This Agreement shall be governed by, and construed in accordance
with, the laws of the State of Arizona. If any term of this Agreement or the
application thereof to any person or circumstances shall to any extent be
invalid or unenforceable, the remainder of this Agreement or the application of
such term to any person or circumstances other than those as to which it is
invalid or unenforceable shall not be affected thereby, and each term of this
Agreement shall be made valid and enforceable to the fullest extent permitted
by law.
<PAGE>   95
         IN WITNESS WHEREOF, Mortgagee, World and Mariah have duly executed
this Agreement as of the date first above written.

                                    WORLD SAVINGS and LOAN ASSOCIATION, a
                                    Federal Savings and Loan Association



                                    By:_______________________________________

                                    Title:____________________________________



                                    MARIAH PROPERTIES, LTD., an Arizona 
                                    corporation



                                    By:_______________________________________

                                    Title:____________________________________



                                    [MORTGAGEE]



                                    By:_______________________________________

                                    Title:____________________________________
<PAGE>   96
                                   EXHIBIT A

                                       TO

              NONDISTURBANCE, RECOGNITION AND ATTORNMENT AGREEMENT

                        [Identification of the Mortgage]
<PAGE>   97
                                   EXHIBIT B

                                       TO

              NONDISTURBANCE, RECOGNITION AND ATTORNMENT AGREEMENT

                    [Legal Description of the Real Property]
<PAGE>   98
                                    SUN CITY

                    EXHIBIT E [10.2(a)(iii) and 10.2(b)(ii)]

                      ASSIGNMENT AND ASSUMPTION AGREEMENT

                           [TO BE IN RECORDABLE FORM]


         THIS ASSIGNMENT AND ASSUMPTION AGREEMENT, entered into this ______day
of ___________________________, 1993, by and between PriMerit Bank, FSB (the
"Assignor"), and World Savings and Loan Association, (called the "Assignee"):

         WITNESSETH:

         WHEREAS by that certain Lease dated November 21, 1989 (the "Lease"),
Mariah Properties, Ltd., an Arizona corporation, as lessor leased to Assignor
as lessee certain premises located in King's Inn Center, Sun City, Maricopa
County, Arizona (hereinafter called the "Premises") for the term and upon the
terms and conditions contained in said Lease;

         WHEREAS, Assignor and Assignee have entered into that certain Branch
Purchase and Assumption Agreement dated May ___, 1993, (the "Agreement"),
whereby Assignor has agreed to sell and Assignee has agreed to purchase certain
of the assets of Assignor described therein and whereby Assignor has agreed to
transfer and Assignee has agreed to assume certain of the liabilities of
Assignor described therein; and

         WHEREAS, Assignor desires to assign the Lease to Assignee and Assignee
desires to accept said assignment and to assume the obligations of Assignor
under the Lease, all upon the terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the premises and for other good
and valuable consideration, the receipt whereof is hereby acknowledged, the
parties agree as follows:

         1.    Assignor hereby assigns to Assignee all of the Assignor's right,
title and interest in and to the Lease, the Premises, the security deposit
identified in paragraph 6 of the Lease and all leasehold improvements and
fixtures installed or located therein, free and clear of liens, encumbrances,
restrictions and other matters except as expressly set forth in Exhibit A
hereto.

         2.    The representations and warranties of Assignor under the
Agreement in respect of the Lease and the Premises are correct, complete and
unchanged from the date of the Agreement.
<PAGE>   99
         3.    Assignee hereby accepts said assignment of Assignor's interest
in the Lease and hereby assumes all of the obligations of the lessee under the
Lease first arising and accruing on or after the date hereof.

         4.    Assignor agrees to and does hereby indemnify, defend and hold
Assignee harmless from and against any loss, liability, damage, claims,
demands, cost or expense, including reasonable attorneys' fees, arising out of
or in connection with the obligations of the lessee under the Lease or the use
and occupancy of the Premises prior to the date hereof which are or may be
imposed upon, incurred by or asserted against Assignee by reason of Assignor's
failure to perform its obligations under this Agreement or under the Lease.

         5.    Assignee agrees to and does hereby indemnify and hold Assignor
harmless from and against any loss, liability, damage, claims, demands, cost or
expense, including reasonable attorneys' fees, resulting directly from
Assignee's breach of its obligations as the lessee under the Lease arising on
or after the date hereof which are imposed upon or incurred by Assignor by
reason of Assignee's failure to perform its obligations under this Agreement or
under the Lease.

         6.    Should any action or proceeding be commenced between the parties
to this Assignment concerning this Assignment, or the rights and duties of
either in relation hereto, the party prevailing in such litigation shall be
entitled, in addition to such other relief as may be granted in the action or
proceeding, to a reasonable sum as and for its attorneys' fees in such
litigation which shall be determined by the court in such litigation or in a
separate action brought for that purpose.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
signed the day and year first above written.

                                    PriMerit BANK, FSB



                                    By:_______________________________________
                                    [NAME]
                                    [TITLE]


                                    WORLD SAVINGS AND LOAN ASSOCIATION,
                                    a Federal Savings and Loan Association



                                    By:_______________________________________
                                    [NAME]
                                    [TITLE]
<PAGE>   100
                                   EXHIBIT A

                                       TO

                      ASSIGNMENT AND ASSUMPTION AGREEMENT


                     List of Permitted Title Exceptions for
                            Sun City Lease Location
<PAGE>   101
                             SUPPLEMENTAL AGREEMENT

                 WORLD SAVINGS AND LOAN ASSOCIATION ("WORLD") and PRIMERIT
BANK, FSB ("PriMerit") executed a Branch Purchase and Assumption Agreement,
dated as of May 12, 1993, as amended ("Agreement") pursuant to which World has
agreed to acquire and PriMerit has agreed to dispose of certain interests in
real property, subject to various conditions as set forth in the Agreement. The
transactions contemplated by the Agreement are scheduled to close on August 13,
1993, and during the course of the performance by the respective parties,
certain provisions of the Agreement have been modified by mutual agreement. The
purpose of this Supplemental Agreement is to memorialize those changes without
the necessity of rewriting the Agreement.

                 In furtherance of the foregoing the parties agree to the
following changes in the Agreement effective as of August  12, 1993:

                 1.       Section 1.1(d) is amended to read as follows:

                          "(d) 'Camelback Lease' means that certain Lease
                          between PriMerit, as Landlord, and World, as Tenant,
                          with a commencement date on or about August 13, 1993,
                          and having real property in the City of Phoenix as
                          the premises demised thereunder;"

                 2.       Sections 1.1(g); 1.1(h); 1.1(s) 1.1(ff); 8.3(b)(vi);
                          and 10.2(a)(ix) are deleted in their entirety.

                 3.       Section 1.1(k) is amended to read as follows:

                          "(k)    'Contract Rights' means all rights and
                          interests of PriMerit in, to, or under all contracts,
                          licenses, agreements, or other instruments relating
                          to the Realty except to the extent that they are the
                          subject of the Purchase Agreement and except the
                          Branch Lease and the Camelback Lease;"

                 4.       Wherever in the Agreement, including without
                          limitation Sections 1.1(x), 1.1(bb), 1.1(ee), 4.1,
                          5.1, 5.3, 5.8, 5.9, and 7.2(1), the term "Camelback
                          Subleasehold Estate" is used, such term shall be
                          amended to read "Camelback Leasehold Estate."

                 5.       Whenever in the Agreement, including without
                          limitation Sections 3.1 and 4.1, the term "Camelback
                          Sublease" is used, such term shall be amended to read
                          "Camelback Lease."

                 6.       Section 5.2 is amended by deleting from the form of
                          surveyor's certification the clause "that no such
                          buildings or improvements violate any setback
                          requirement;", it being understood that the Title
                          Company does not require such certification as a
                          condition of issuing the Title 
<PAGE>   102
                          Policies, and World has agreed to accept zoning 
                          confirmation letters from the applicable municipal 
                          jurisdictions in lieu of such certification.

                 7.       Section 5.6 is amended by deleting everything after
                          "enter upon and inspect the Camelback Office" through
                          "10.2(b)(ii) below."

                 8.       The last sentence of Section 7.2(g) as amended to
                          read:

                          "As of the Closing Date all the Locations shall be
                          free and clear of any and all Hazardous Substances
                          except for asbestos containing materials at the
                          Camelback Office identified in the Environmental
                          Report of Dames & Moore, dated July 21, 1993, the
                          removal, control and management of which shall be
                          governed by the Camelback Lease and by the Operations
                          and Maintenance Plan which will be adopted by the
                          parties as of the Closing Date."

                 9.       Section 7.2(u) is amended to read as follows:

                          "(u)    PriMerit shall have, as of the Closing Date,
                          good and marketable indefensible title in fee simple
                          to the premises which are the subject of the
                          Camelback Lease, subject only to: (i) the Permitted
                          Exceptions, (ii) zoning, setback, building and other
                          similar restrictions which are not violated in any
                          material respect and which do not and will not, in
                          World's opinion, have an adverse effect on use of the
                          Camelback Office for retail banking purposes, and
                          (iii) the effect, if any, of that certain Conditional
                          Quit Claim Deed, recorded May 22, 1985 in Document
                          85-234437, in which the City of Phoenix is grantee.
                          The premises subject to the Camelback Lease are all
                          the real property and improvements used by PriMerit
                          for or in connection with the operation of its
                          Camelback branch location. The Camelback Office has
                          been classified by the applicable zoning authority in
                          the zoning classification set forth in Schedule E
                          with respect thereto. The property tax parcel numbers
                          set forth in Schedule E are the only tax parcel
                          numbers assigned to the premises to be demised under
                          the Camelback Lease and said numbers include no other
                          property. PriMerit is in exclusive possession of the
                          Camelback Office and the Camelback Office is not
                          subject to any sublease, license or other occupancy
                          agreement. There are no condemnation or eminent
                          domain actions pending or threatened which affect the
                          Camelback Office."

                 10.      Section 8.3(a)(i) is amended by deleting "or the
                          Camelback Lease".

                 11.      Section 8.3(d) is amended to read as follows:





                                        2
<PAGE>   103
                          "(d)    Not later than the day before the Closing,
                          PriMerit and World shall have agreed upon the form of
                          the Camelback Lease, (i) having as a base rent
                          payable thereunder, an amount comparable to the base
                          rent heretofore payable by PriMerit under that
                          certain lease agreement with Ruth K. Watanabe with
                          respect to the Camelback Office, (ii) obligating
                          World to pay amounts equivalent to the ad valorem
                          real property taxes on the Camelback Office and the
                          sales, excise or similar taxes measurable by the
                          rentals paid under the Camelback Lease, (iii) making
                          the expenses and costs of day-to-day operations,
                          maintenance and repair of the Camelback Office the
                          responsibility of World, and (iv) containing other
                          terms and conditions mutually acceptable to World and
                          PriMerit which are commercially reasonable in a lease
                          between unrelated parties for free-standing office
                          buildings in the metropolitan Phoenix, Arizona area."

                 12.      Section 10.2(a)(viii) is amended to read:

                          "(viii) the Camelback Lease and a memorandum or short
                          form thereof;"

                 13.      Section 10.2(b)(ii) is amended to read:

                          "(ii)   the Camelback Lease and a memorandum or short
                          form thereof;"

                 14.      Section 11.3 is amended to read as follows:

                          "11.3.  In the event that, for any reason, the
                          parties hereto fail to enter into a mutually
                          acceptable Camelback Lease as described in Section
                          8.3(d) above as required by Sections 10.2(a)(viii)
                          and 10.2(b)(ii), World in such event, at World's
                          option, may elect to exclude the Camelback Office
                          from the transaction which is the subject of this
                          Agreement and upon such exclusion the parties shall
                          be relieved from all further obligations under this
                          Agreement in respect of the Camelback Office and the
                          Camelback Lease."





                                       3
<PAGE>   104
                          This Supplemental Agreement is intended to meet the
requirements of Section 13.5 of the Agreement. Except as expressly set forth
above, the parties hereto ratify and affirm the provisions of the Agreement.

                          DATED:  August 12, 1993.

                                    WORLD SAVINGS AND LOAN ASSOCIATION

                                    By:_______________________________________

                                    Its:______________________________________

                                    PRIMERIT BANK, FSB

                                    By:_______________________________________

                                    Its:______________________________________





                                       4
<PAGE>   105
                           NON-COMPETITION AGREEMENT

                 This NON-COMPETITION AGREEMENT (the "Agreement") is made and
entered into this 12th day of May, 1993 by PriMerit Bank, FSB ("PriMerit"),
Southwest Gas Corporation ("Southwest Gas"), a California corporation, and
World Savings and Loan Association ("World"). All capitalized terms used herein
without definition have the meaning assigned to them in the Purchase Agreement
(as defined below).

                 A.       WHEREAS, PriMerit is a wholly owned subsidiary of
Southwest Gas;

                 B.       WHEREAS, World and PriMerit are contemporaneously
entering into an Agreement to Purchase Assets and Assume Liabilities dated May
12, 1993 (the "Purchase Agreement") pursuant to which World will acquire
certain assets and assume certain liabilities of PriMerit located in the State
of Arizona; and

                 C.       WHEREAS, execution of this Agreement is a condition
to the obligations of World and PriMerit to enter into the Purchase Agreement;

                 NOW, THEREFORE, in consideration of the promises and of the
mutual agreements herein contained, and for other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, and
in order to induce World to purchase certain assets and assume certain
liabilities pursuant to the terms of the Purchase Agreement, PriMerit and
Southwest Gas hereby undertake, covenant, and agree as follows:

                          1.      Non-Competition by PriMerit. For a period of
five years commencing as of the Closing Date, PriMerit and Southwest Gas will
not, and will not permit any subsidiary to, (i) open either a new deposits
gathering facility or automated teller machine in the State of Arizona or (ii)
solicit by mail, general advertisement, or other means specifically directed
into Arizona, any deposits from persons residing in the State of
<PAGE>   106
                                       2

Arizona. This restriction shall not apply in the event that PriMerit is merged
with and into an unaffiliated depository institution which is operating a
retail deposit branch franchise in the State of Arizona; provided, that, the
institution resulting from such merger shall not do business in the State of
Arizona during such five-year period under any of the various trademarks or
trade names currently owned or used by PriMerit nor shall such resulting
institution solicit the loan customers of PriMerit whose loans have been
purchased by World or the former depositors of PriMerit.

                          2.      Restrictions on Transfer of Branch. For a 
period of three years commencing as of the Closing Date, PriMerit and 
Southwest Gas (to the extent Southwest Gas acquires the Sun City-Bell branch),
shall not: (i) sublease, assign or transfer, in any manner, the premises of 
the Sun City-Bell branch to a thrift institution, commercial bank or other 
depository institution; (ii) enter into a transaction with any lessor of the 
Sun City-Bell branch that contemplates or results in a lease or sublease of 
the premises of the Sun City-Bell branch to a thrift institution, commercial 
bank or other depository institution; or (iii) take any other action that 
would permit or result in the operation on the premises of the Sun City-Bell 
branch of an office or branch of a thrift institution, commercial bank or 
other depository institution; provided, that, it shall not be deemed a 
violation of this provision for PriMerit or Southwest Gas to lease additional 
space to persons who are tenants at the Sun City-Bell branch at the time of 
Closing or to engage in one of the transactions restricted herein with a 
brokerage house.

                          3.      No Solicitation. For a period of three (3)
years following the Closing Date, PriMerit or Southwest Gas will not initiate
contact with any of the employees
<PAGE>   107
                                       3

of PriMerit who are still employed by World for the purpose of offering that
person employment with PriMerit or Southwest Gas.

                          4.      Compensation. As consideration for the
agreements of PriMerit described herein, World will pay PriMerit $1,600,000,
due and payable at Closing.   Southwest Gas hereby acknowledges that the
receipt of such consideration by PriMerit is of indirect benefit to it.

                          5.      Necessity of Covenants. PriMerit and
Southwest Gas hereby acknowledge and agree that the covenants contained in this
Agreement, and the geographic reach and duration of such covenants, are
reasonable and fully necessary for the protection of the legitimate interest of
World and, at the same time, are neither harsh nor oppressive to the rights or
interests of PriMerit or Southwest Gas or any party which is or shall become an
affiliate of PriMerit or Southwest Gas controlled by PriMerit or Southwest Gas.

                          6.      Unenforceable Provisions.  If any of the
provisions of this Agreement are held to be unenforceable because of the scope,
term or area of their applicability, then the court making such determination
shall have the power to modify such scope, term or area or all of them to the
extent necessary to render this Agreement enforceable under applicable law, and
such provisions shall then be enforceable in such modified form.  It is the
intention of the parties that each and every provision of this Agreement shall
be valid and enforceable to the fullest extent and in the broadest application
permitted by law.

                          7.      Representations and Warranties of PriMerit
and Southwest Gas. PriMerit and Southwest Gas hereby represent and warrant to
World as follows: PriMerit and
<PAGE>   108
                                       4

Southwest Gas are corporations duly organized, validly existing and in good
standing under their respective jurisdictions of incorporation.  PriMerit and
Southwest Gas have full corporate power and authority to execute and deliver
this Agreement and to perform all of their obligations under this Agreement.
This Agreement has been duly authorized by all necessary corporate action on
the part of PriMerit and Southwest Gas, has been duly and validly executed and
delivered by PriMerit and Southwest Gas and, assuming this Agreement has been
duly and validly executed and delivered by World, constitutes a valid and
binding agreement of PriMerit and Southwest Gas enforceable against PriMerit
and Southwest Gas in accordance with its terms, subject in each case to
applicable bankruptcy, insolvency, reorganization, moratorium, and other
similar laws now or hereafter in effect relating to or affecting creditors'
rights generally, to general equitable principles, and to utility regulatory
laws, whether applied by a court of law or equity.

                          8.      Remedies. The parties agree that World will
be irreparably damaged if the provisions hereof are not specifically enforced,
and that World shall be entitled to an injunction (either preliminary,
permanent, or both) restraining any violation of this Agreement by PriMerit or
Southwest Gas, or any other appropriate decree of specific performance. Such
remedy shall not be exclusive and shall be in addition to any other remedy
which World may have including, without limitation, recovery of damages.

                          9.      Binding Effect. This Agreement shall inure to
the benefit of World and its successors and assigns, and shall be binding upon
PriMerit and Southwest Gas and their successors and assigns. No party hereto
may assign its rights or delegate its obligations under this Agreement without
the express prior written consent of the other
<PAGE>   109
                                       5

party hereto and any attempted assignment or delegation without such consent
shall be without force or effect.  Nothing in this Agreement shall interfere
with the operation of SWG Federal Credit Union in Arizona or in any state in
which Southwest Gas operates.

                          10.     Governing Law.  This Agreement shall be
construed in accordance with and governed by the laws of the State of
California, exclusive of the conflict of laws provisions thereof.  Each of the
parties hereto hereby irrevocably and unconditionally consents to the exclusive
jurisdiction of the courts of the State of California and of the United States
of America, in each case located in the County of Alameda, for any actions,
suits or proceedings arising out of or relating to this Agreement and the
transactions contemplated hereby (and agrees not to commence any action, suit
or proceeding relating thereto except in such courts).

                          11.     Headings.  The headings of the actions of
this Agreement are inserted for convenience only and shall not be deemed to
constitute part of this Agreement or to affect the construction thereof.

                          12.     Modification and Waiver.  No amendment,
modification, or alteration of this Agreement shall be binding unless the same
shall be in writing, duly executed by PriMerit, Southwest Gas and World.  No
waiver of any of the provisions of this Agreement shall constitute a waiver of
any other provision hereof.  No delay on the part of World in exercising any
right or privilege hereunder shall operate as a waiver of any other breach of
this Agreement.

                          13.     Attorneys' Fees. Each party shall bear the
cost of its own
<PAGE>   110
                                       6

attorneys' fees incurred in connection with the preparation of this Agreement
and consummation of the transactions described herein.  Notwithstanding the
foregoing, in any action between the parties seeking enforcement of any of the
terms and provisions of this Agreement or in connection with any of the
property described herein, the prevailing party in such action shall be awarded
its reasonable costs and expenses and reasonable attorneys' fees.

                          14.     Entire Agreement. This Agreement contains the
entire agreement among the parties with respect to the subject matter hereof,
and supersedes all prior agreements, written or oral, with respect thereto.
<PAGE>   111
                                       7

                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed as of the date first stated above.

                                    PRIMERIT BANK, FSB

                                    By:_______________________________________
                                    Title:  President & Chief Executive Officer
                                            DAN J. CHEEVER

                                    SOUTHWEST GAS CORPORATION

                                    By:_______________________________________
                                    Title:  President & Chief Operating Officer

                                    WORLD SAVINGS AND LOAN ASSOCIATION

                                    By:_______________________________________
                                    Title:  Senior Vice President
<PAGE>   112
                              CONSULTING AGREEMENT


                 THIS CONSULTING AGREEMENT (the "Agreement") is made and
entered into this 12th day of May, 1993, by and between World Savings and Loan
Association ("World") and PriMerit Bank, FSB ("PriMerit"). All capitalized
terms used herein without definition have the meaning assigned to them in the
Purchase Agreement (as defined below).

                 A.       WHEREAS, World and PriMerit are contemporaneously
entering into an Agreement to Purchase Assets and Assume Liabilities dated May
12, 1993 (the "Purchase Agreement") pursuant to which World will acquire
certain assets and assume certain liabilities of PriMerit located in the State
of Arizona;

                 B.       WHEREAS, World recognizes that PriMerit has developed
considerable expertise in the management and marketing of a retail consumer
financial branch franchise in the State of Arizona and, in connection with its
acquisition of PriMerit, World wishes to have the benefit of this expertise in
assimilating the PriMerit operations and in developing its own Arizona
operations;

                 C.       WHEREAS, execution of this Agreement is a condition
to the obligation of World and PriMerit to enter into the Purchase Agreement;
and

                 D.       WHEREAS, World and PriMerit desire to set forth in 
this Agreement the terms and conditions pursuant to which PriMerit will 
provide consulting services to World;

                 NOW, THEREFORE, in consideration of the promises and of the
mutual agreements herein contained, and for other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, and
in order to induce World to purchase
<PAGE>   113
                                       2

certain assets and assume certain liabilities pursuant to the terms of the
Purchase Agreement, the parties hereby undertake, covenant, and agree as
follows:

                          1.      Duties of Consultants.

                                  (a)      Beginning on the date of Closing of
the Purchase Agreement and continuing through December 31, 1993, PriMerit shall
cause one or more of its employees to provide consulting services to World (the
"Consulting Employees") with respect to the management, marketing and
integration of the Branch Offices acquired by World and with respect to the
financial services business generally in the State of Arizona.  World may
request that PriMerit designate particular employees to provide such consulting
services and PriMerit will honor those requests in the ordinary course. The
Consulting Employees shall devote their close attention and best efforts to
such consulting services.

                                  (b)      The Consulting Employees will be
available to perform the services described herein from time to time at the
request of World during the normal business day, provided that, the Consulting
Employees shall not be required to provide more than 50 hours of service in any
given month.  The Consulting Employees shall not be required to follow a
regular schedule or to report on any periodic basis to World's offices.  The
Consulting Employees may render services by telephone, telefax or written
communication, provided, that, in the reasonable judgment of World, the use of
such means of communication represents an effective and efficient means of
performing such services.

                                  (c)      The Consulting Employees are
employees of PriMerit and shall not be considered employees or agents of World,
nor shall the Consulting Employees have the authority to act for World, except
as specifically agreed herein or as specifically
<PAGE>   114
                                       3

authorized in writing by the Chief Executive Officer of World.  PriMerit shall
at all times be an independent contractor with respect to World for purposes of
this Agreement.

                          2.      Exclusivity of Consulting Arrangement.

                                  World and PriMerit recognize that due to the
nature of the relationship of PriMerit and the Consulting Employees to World
and to the Branch Offices, both in the past and in the future, PriMerit and the
Consulting Employees have had access to and have acquired and may continue to
have access to and acquire information relating to the business and operations
of the Branch Offices and of World, including, without limiting the generality
of the foregoing, information with respect to the Branch Offices and World's
present and prospective products, systems, customers, agents, process, and
sales and marketing methods, other than information which is, or becomes,
generally available to the public ("Confidential Information"). PriMerit
accordingly agrees that for a period of two (2) years from the date of this
Agreement, neither PriMerit nor any of its employees shall perform financial
consulting or advisory services pursuant to a formal agreement or otherwise for
any other depository or financial institution in the State of Arizona.

                          3.      Confidential Information.

                                  PriMerit hereby agrees that neither it nor
the Consulting Employees shall, at any time during the term of this Agreement
or thereafter, reveal, divulge, or make known to any person, or use for its or
their own account, any Confidential Information now known to them or made known
to them by reason of PriMerit providing consulting services to World under this
Agreement. Upon expiration of the consulting period set forth in Section 1
hereof, all documents, records, notebooks, magnetic storage materials,
<PAGE>   115
                                       4

and similar repositories of or containing Confidential Information, including
all copies thereof, then in the possession of PriMerit, or the Consulting
Employees or under their control, whether prepared by any of them or others,
will be immediately returned to World.

                          4.      Compensation.

                                  As consideration for PriMerit's consulting
services hereunder, World will pay to PriMerit $750,000, due and payable at
Closing.
                          5.      Representation and Warranty of PriMerit.

                                  (a)      PriMerit hereby represents and
warrants to World that the performance of its duties hereunder does not and
will not violate any provision of law or fiduciary duty by which PriMerit or
any of the Consulting Employees is bound and will not conflict with or result
in a breach of any agreement or instrument to which  PriMerit or any of the
Consulting Employees is a party or by which it or he are bound or affected.

                                  (b)      PriMerit hereby represents, warrants
and agrees that it will obtain from each person who serves as a Consulting
Employee a written undertaking in substantially the form of Exhibit A annexed
hereto. PriMerit shall deliver to World a signed copy of each such undertaking
within five (5) days after the same shall have been obtained by PriMerit.

                          6.      General Provisions.

                                  (a)      Governing Law. The terms of this
Agreement shall be governed by and construed in accordance with the laws of the
State of California, exclusive of the conflicts of law provisions thereof.

                                  (b)      Titles for Convenience. Any titles
used in this Agreement
<PAGE>   116
                                       5

are for convenience only and shall not be deemed to affect the meaning or
construction of any of the provisions of this Agreement.

                                  (c)      Binding Effect. This Agreement shall
inure to the benefit of World and its successors and assigns, and shall be
binding upon PriMerit and its successors and assigns. No party hereto may
assign its rights or delegate its obligations under this Agreement without the
express prior written consent of the other party hereto.

                                  (d)      Counterparts. This Agreement may be
executed in any number of counterparts, each of which shall be deemed to be an
original and all of which together shall be deemed one and the same instrument.

                                  (e)      Modification and Waiver. No
amendment, modification, or alteration of this Agreement shall be binding
unless the same shall be in writing, duly executed by PriMerit and World. No
waiver of any of the provisions of this Agreement shall constitute a waiver of
any other provision hereof. No delay on the part of World in exercising any
right or privilege hereunder shall operate as a waiver thereof and no waiver of
any breach of this Agreement shall operate as a waiver of any other breach of
this Agreement.

                                  (f)      Attorneys' Fees. Each party shall
bear the cost of its own attorneys' fees incurred in connection with the
preparation of this Agreement and consummation of the transactions described
herein. Notwithstanding the foregoing, in any action between the parties
seeking enforcement of any of the terms and provisions of this Agreement or in
connection with any of the property described herein, the prevailing party in
such action shall be awarded its reasonable costs and expenses and reasonable
attorneys'
<PAGE>   117
                                       6

fees.

                                  (g)      Entire Agreement. This Agreement
contains the entire agreement among the parties with respect to the subject
matter hereof, and supersedes all prior agreements, written or oral, with
respect thereto.

                 IN WITNESS WHEREOF, this Agreement has been executed and
accepted as of the date first stated above.

                                PRIMERIT BANK, FSB


                                By:_______________________________________
                                Title:  President and Chief Executive Officer
                                        DAN J. CHEEVER

                                WORLD SAVINGS AND LOAN ASSOCIATION


                                By:_______________________________________
                                   Title:  Senior Vice President
<PAGE>   118
                                   EXHIBIT A

World Savings and Loan Association
1901 Harrison Street
Oakland, California 94612-3587

Gentlemen:

                 The undersigned understand(s) that World Savings and Loan
Association and PriMerit Bank, FSB have entered into a Consulting Agreement
(the "Agreement") dated May 12, 1993, in connection with World's acquisition of
certain branches of PriMerit located in the state of Arizona (the "Branch
Offices"). Pursuant to that Agreement, the undersigned understands that he/she
may be requested to provide consulting services to World with respect to
management, marketing and integration of the Branch Offices and with respect to
the financial services business generally in the State of Arizona.

                 The undersigned recognize(s) that he/she may have had access
to and may continue to have access to confidential and proprietary information
relating to the business and operations of the Branch Offices and of World,
including, without limiting the generality of the foregoing, information with
respect to the Branch Offices and World's present and prospective products,
systems, customers, agents, process, and sales and marketing methods, other
than information which is, or becomes, generally available to the public
("Confidential Information"). The undersigned accordingly agrees that he/she
shall not at any time during the term of the Agreement or thereafter, reveal,
divulge, or make known to any person, or use for his/her own account, any
Confidential Information now known to him/her or made known to him/her by
reason of providing consulting services to World under this Agreement. Upon
expiration of the Agreement, the undersigned further agree(s) that all
documents, records, notebooks, magnetic storage materials, and similar
repositories of or containing Confidential Information, including all copies
thereof, then in the possession of the undersigned will be immediately returned
to World.

                                    Yours very truly,

                                    __________________________________________

                                    Dated:____________________________________

<PAGE>   1
                                                                   Exhibit 21.01
 
                           SOUTHWEST GAS CORPORATION
 
                     LIST OF SUBSIDIARIES OF THE REGISTRANT
 
                              AT DECEMBER 31, 1993
 
<TABLE>
<CAPTION>
                                                                      STATE OF INCORPORATION
                          SUBSIDIARY NAME                              OR ORGANIZATION TYPE
- -----------------------------------------------------------------------------------------------
<S>                                                                 <C>
The Southwest Companies                                                       Nevada
PriMerit Bank                                                        Federally chartered stock
                                                                           savings bank
Paiute Pipeline Company                                                       Nevada
Carson Water Company                                                          Nevada
Southwest Gas Transmission Company                                      Partnership between
                                                                     Southwest Gas Corporation
                                                                    and Utility Financial Corp.
Utility Financial Corp.                                                       Nevada
Southwest Gas Corporation of Arizona                                          Nevada
                                         PRIMERIT BANK
                                         SUBSIDIARIES
                                     AT DECEMBER 31, 1993
First Nevada, Ltd.                                                            Nevada
Home Trustee, Inc.                                                            Nevada
Nevada-Vistas Corporation                                                     Nevada
Nevada-High Country II Corporation                                            Nevada
Trans-Pacific Funding Corp.                                                 California
Nevada-Karmlco                                                              California
Nevada-Los Colinas                                                            Nevada
Nevada-Verdemont Corporation                                                California
NEV Development Corporation                                                   Arizona
First Nevada Company                                                          Nevada
H. S. Service Corporation                                                     Nevada
Nevada Equities, Ltd.                                                         Nevada
BSF Trustee, Inc.                                                             Nevada
Nevada Laurel Corporation                                                     Nevada
Nevada Capital, Ltd.                                                        California
PriMerit Investor Services                                                    Nevada
Nevada-Victorville Corporation                                              California
Nevada-Esinore Corporation                                                  California
Nevada-La Cresta Corporation                                                California
Nevada-Cleveland Corporation                                                California
</TABLE>
 

<PAGE>   1
                                                                   Exhibit 23.01
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
     As independent public accountants, we hereby consent to the incorporation
of our reports dated February 25, 1994 (1993 Annual Report on Form 10-K and
Supplemental Schedules), included in this Form 10-K, into Southwest Gas
Corporation's previously filed registration statements on Form S-8 which was
filed on June 29, 1990 (File No. 33-35637), Form S-3 which was filed on June 29,
1990 (File No. 33-35636), and Form S-8 which was filed on July 5, 1990 (File No.
33-35737).
 
                                          ARTHUR ANDERSEN & CO.
 
Las Vegas, Nevada
March 25, 1994
 


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