SOUTHWEST GAS CORP
10-Q, 1998-05-06
NATURAL GAS TRANSMISISON & DISTRIBUTION
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===============================================================================

               UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549


                                  FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT
OF 1934

                 For the quarterly period ended March 31, 1998


                        Commission File Number 1-7850


                          SOUTHWEST GAS CORPORATION
            (Exact name of registrant as specified in its charter)


              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)


      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (702) 876-7237


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 the number of shares outstanding of each of the issuer's classes of
common stock as of the latest practicable date.

Common Stock, $1 Par Value, 27,542,320 shares as of April 16, 1998

===============================================================================
                                       1<PAGE>
<PAGE>

                         PART I - FINANCIAL INFORMATION
                                        
ITEM 1.  FINANCIAL STATEMENTS
<TABLE>
                            SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
                                    CONSOLIDATED BALANCE SHEETS
                             (Thousands of dollars, except par value)
<CAPTION>

                                                                       MARCH 31,        DECEMBER 31,
                                                                         1998               1997
                                               ASSETS               -------------      -------------
                                                                      (Unaudited)
<S>                                                                 <C>                <C> 
Utility plant:
  Gas plant                                                         $   1,903,485      $   1,867,824
  Less:  accumulated depreciation                                        (567,607)          (551,083)
  Acquisition adjustments                                                   4,165              4,259
  Construction work in progress                                            37,325             39,294
                                                                    -------------      -------------
   Net utility plant                                                    1,377,368          1,360,294
                                                                    -------------      -------------
Other property and investments                                             67,585             64,928
                                                                    -------------      -------------
Current assets:
  Cash and cash equivalents                                                17,850             17,567
  Accounts receivable, net of allowances                                   78,873             78,016
  Accrued utility revenue                                                  33,500             54,373
  Income tax benefit                                                           --             19,425
  Deferred purchased gas costs                                             86,351             86,952
  Prepaids and other current assets                                        28,968             32,211
                                                                    -------------      -------------
   Total current assets                                                   245,542            288,544
                                                                    -------------      -------------
Deferred charges and other assets                                          54,842             55,293
                                                                    -------------      -------------
Total assets                                                        $   1,745,337      $   1,769,059
                                                                    =============      =============

CAPITALIZATION AND LIABILITIES
Capitalization:
  Common stock, $1 par (authorized - 45,000,000 shares; issued
   and outstanding - 27,521,170 and 27,387,016 shares)              $      29,151      $      29,017
  Additional paid-in capital                                              362,891            360,683
  Retained earnings (accumulated deficit)                                  26,581             (3,721)
                                                                    -------------      -------------
   Total common equity                                                    418,623            385,979
  Redeemable preferred securities of Southwest Gas Capital I               60,000             60,000
  Long-term debt, less current maturities                                 778,485            778,693
                                                                    -------------      -------------
   Total capitalization                                                 1,257,108          1,224,672
                                                                    -------------      -------------
Current liabilities:
  Current maturities of long-term debt                                      5,215              5,621
  Short-term debt                                                          78,000            142,000
  Accounts payable                                                         57,503             62,324
  Customer deposits                                                        22,496             21,945
  Accrued taxes                                                            31,233             21,125
  Accrued interest                                                         13,676             13,007
  Deferred taxes                                                           25,715             24,163
  Other current liabilities                                                31,809             34,222
                                                                    -------------      -------------
   Total current liabilities                                              265,647            324,407
Deferred income taxes and other credits:                            -------------      -------------
  Deferred income taxes and investment tax credits                        170,156            168,282
  Other deferred credits                                                   52,426             51,698
                                                                    -------------      -------------
   Total deferred income taxes and other credits                          222,582            219,980
                                                                    -------------      -------------
Total capitalization and liabilities                                $   1,745,337      $   1,769,059
                                                                    =============      =============

                     The accompanying notes are an integral part of these statements.

</TABLE>                               2<PAGE>
        

<PAGE>
<TABLE>

                                  SOUTHWEST GAS CORPORATION AND SUBSIDIARIES

                                       CONSOLIDATED STATEMENTS OF INCOME
                                   (In thousands, except per share amounts)
                                             (Unaudited)
                                        
<CAPTION>
                                                      THREE MONTHS ENDED        TWELVE MONTHS ENDED
                                                           MARCH 31,                  MARCH 31,
                                                  ------------------------    ------------------------
                                                     1998          1997          1998          1997
                                                  ----------    ----------    ----------    ----------
<S>                                               <C>           <C>           <C>           <C>
Operating revenues:
  Gas operating revenues                          $  274,363    $  211,564    $  677,464    $  569,573
  Construction revenues                               18,238        23,667       111,916       121,367
                                                  ----------    ----------    ----------    ----------
   Total operating revenues                          292,601       235,231       789,380       690,940
                                                  ----------    ----------    ----------    ----------
Operating expenses:
  Net cost of gas sold                               120,987        84,599       245,726       193,710
  Operations and maintenance                          50,850        48,448       203,561       199,601
  Depreciation and amortization                       21,384        20,631        85,414        77,791
  Taxes other than income taxes                        7,972         7,654        29,711        28,216
  Construction expenses                               15,906        22,384        98,720       107,073
                                                  ----------    ----------    ----------    ----------
   Total operating expenses                          217,099       183,716       663,132       606,391
                                                  ----------    ----------    ----------    ----------
Operating income                                      75,502        51,515       126,248        84,549
                                                  ----------    ----------    ----------    ----------
Other income and (expenses):
  Net interest deductions                            (16,280)      (14,632)      (64,866)      (56,592)
  Preferred securities distributions                  (1,369)       (1,369)       (5,475)       (5,475)
  Other income (deductions), net                         602          (371)      (11,267)       (1,187)
                                                  ----------    ----------    ----------    ----------
   Total other income and (expenses)                 (17,047)      (16,372)      (81,608)      (63,254)
                                                  ----------    ----------    ----------    ----------
Income before income taxes                            58,455        35,143        44,640        21,295
Income tax expense                                    22,502        13,575        13,786         8,012
                                                  ----------    ----------    ----------    ----------
Net income                                        $   35,953    $   21,568    $   30,854    $   13,283
                                                  ==========    ==========    ==========    ==========

Basic earnings per share                          $     1.31    $     0.80    $     1.13    $     0.50
                                                  ==========    ==========    ==========    ==========
Diluted earnings per share                        $     1.30    $     0.80    $     1.13    $     0.50
                                                  ==========    ==========    ==========    ==========
Dividends paid per share                          $    0.205    $    0.205    $     0.82    $     0.82
                                                  ==========    ==========    ==========    ==========

Average number of common shares outstanding           27,447        26,816        27,225        26,437
Average shares outstanding (assuming dilution)        27,605        26,939        27,358        26,527

                     The accompanying notes are an integral part of these statements.

</TABLE>                               3<PAGE>

<PAGE>
<TABLE>
                                  SOUTHWEST GAS CORPORATION AND SUBSIDIARIES                                               
                                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                            (Thousands of dollars)
                                                  (Unaudited)
<CAPTION>
                                        
                                                              THREE MONTHS ENDED         TWELVE MONTHS ENDED
                                                                   MARCH 31,                   MARCH 31,
                                                           ------------------------    ------------------------
                                                              1998          1997          1998          1997
                                                           ----------    ----------    ----------    ----------

<S>                                                        <C>           <C>           <C>           <C>
CASH FLOW FROM OPERATING ACTIVITIES:
 Net income                                                $   35,953    $   21,568    $   30,854    $   13,283
 Adjustments to reconcile net income to net
   cash provided by (used in) operating activities:
   Depreciation and amortization                               21,384        20,631        85,414        77,791
   Deferred income taxes                                        3,426        26,919        23,983        43,154
   Changes in current assets and liabilities:
     Accounts receivable, net of allowances                      (857)       (2,576)       (6,194)      (15,202)
     Accrued utility revenue                                   20,873        18,230        (5,230)         (199)
     Deferred purchased gas costs                                 601       (69,548)      (26,235)      (95,016)
     Accounts payable                                          (4,821)       (6,422)       13,974        (8,888)
     Accrued taxes                                             29,533         1,860        19,396       (34,029)
     Other current assets and liabilities                       2,438         1,523         2,919        11,144
   Other                                                           32           379        13,542         7,609
                                                           ----------    ----------    ----------    ----------
   Net cash provided by (used in) operating activities        108,562        12,564       152,423          (353)
                                                           ----------    ----------    ----------    ----------
CASH FLOW FROM INVESTING ACTIVITIES:
 Construction expenditures and property additions             (37,212)      (39,746)     (167,080)     (219,807)
 Proceeds from bank sale                                           --            --           --        191,662
 Other                                                         (3,310)       (1,314)       (3,304)      (23,321)
                                                           ----------    ----------    ----------    ----------
   Net cash used in investing activities                      (40,522)      (41,060)     (170,384)      (51,466)
                                                           ----------    ----------    ----------    ----------

CASH FLOW FROM FINANCING ACTIVITIES:
 Issuance of common stock                                       2,342         3,150        11,397        16,906
 Dividends paid                                                (5,623)       (5,491)      (22,309)      (21,758)
 Issuance of long-term debt, net                                1,300        67,059        54,562       226,949
 Retirement of long-term debt, net                             (1,776)       (1,915)       (7,426)     (250,319)
 Issuance (repayment) of short-term debt                      (64,000)      (35,000)       (8,000)       83,058
 Other                                                             --            --            --        (1,362)
                                                           ----------    ----------    ----------    ----------
   Net cash provided by (used in) financing activities        (67,757)       27,803        28,224        53,474
                                                           ----------    ----------    ----------    ----------

 Change in cash and temporary cash investments                    283          (693)       10,263         1,655
 Cash at beginning of period                                   17,567         8,280         7,587         5,932
                                                           ----------    ----------    ----------    ----------
 
 Cash at end of period                                     $   17,850    $    7,587    $   17,850    $    7,587
                                                           ==========    ==========    ==========    ==========

 Supplemental information:
 Interest paid, net of amounts capitalized                 $   15,291    $   15,466    $   58,596    $   59,185
 Income taxes, net of refunds                              $     (599)   $       86    $  (34,640)   $   18,768

                        The accompanying notes are an integral part of these statements.

</TABLE>                               4<PAGE>

<PAGE>

Note 1 - Summary of Significant Accounting Policies

  Nature of Operations.  Southwest Gas Corporation (the Company) is comprised
of two segments:  natural gas operations (Southwest or the natural gas
operations segment) and construction services.  Southwest purchases, transports,
and distributes natural gas to customers in portions of Arizona, Nevada, and
California.  Southwest's public utility rates, practices, facilities, and
service territories are subject to regulatory oversight.  The timing and amount
of rate relief can materially impact results of operations.  Natural gas sales
are seasonal, peaking during the winter months.  Variability in weather from
normal temperatures can materially impact results of operations.  Northern
Pipeline Construction Co. (Northern or the construction services segment), a
wholly owned subsidiary, is a full-service underground piping contractor which
provides utility companies with trenching and installation, replacement, and
maintenance services for energy distribution systems.

  Basis of Presentation.  The consolidated financial statements included herein
have been prepared by the Company, without audit, pursuant to the rules and
regulations of the Securities and Exchange Commission.  Certain information and
footnote disclosures normally included in financial statements prepared in
accordance with generally accepted accounting principles have been condensed or
omitted pursuant to such rules and regulations.  The preparation of the
consolidated financial statements requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenue and expenses during the reporting
period.  Actual results could differ from those estimates.  In the opinion of
management, all adjustments, consisting of normal recurring items and estimates
necessary for a fair presentation of the results for the interim periods, have
been made.  It is suggested that these consolidated financial statements be read
in conjunction with the financial statements and the notes thereto included in
the Company's 1997 Annual Report to Shareholders, which is incorporated by
reference into the Form 10-K.

  Intercompany Transactions.  The construction services segment recognizes
revenues generated from contracts with Southwest (see Note 2 below).  Accounts
receivable for these services were $4 million at March 31, 1998 and $3.6 million
at December 31, 1997.  The accounts receivable balance, revenues, and associated
profits are included in the consolidated financial statements of the Company and
were not eliminated during consolidation.  Statement of Financial Accounting
Standards (SFAS) No. 71, "Accounting for the Effects of Certain Types of
Regulation," provides that intercompany profits on sales to regulated affiliates
should not be eliminated in consolidation if the sales price is reasonable and
if future revenues approximately equal to the sales price will result from the
rate-making process.  Management believes these two criteria are being met.
  
Note 2 - Segment Information

The following tables list revenues from external customers, intersegment
revenues, and segment income/loss (thousands of dollars):

<TABLE>
<CAPTION>
                                        Natural Gas     Construction
                                         Operations       Services        Total
                                        -----------     ------------    ----------
<S>                                     <C>             <C>             <C>
Quarter ended March 31, 1998
Revenues from external customers        $  274,363      $    9,131      $  283,494
Intersegment revenues                           --           9,107           9,107
                                        ----------      ----------      ----------   
     Total                              $  274,363      $   18,238      $  292,601
                                        ==========      ==========      ==========
Segment income                          $   35,657      $      296      $   35,953
                                        ==========      ==========      ==========

Quarter ended March 31, 1997
Revenues from external customers        $  211,564      $   14,316      $  225,880
Intersegment revenues                           --           9,351           9,351
                                        ----------      ----------      ---------- 
     Total                              $  211,564      $   23,667      $  235,231
                                        ==========      ==========      ==========
Segment income (loss)                   $   22,536      $     (968)     $   21,568
                                        ==========      ==========      ==========

</TABLE>                               5<PAGE>

<PAGE>
ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

The Company is principally engaged in the business of purchasing, transporting,
and distributing natural gas.  Southwest is the largest distributor in Arizona,
selling and transporting natural gas in most of southern, central, and
northwestern Arizona, including the Phoenix and Tucson metropolitan areas.
Southwest is also the largest distributor and transporter of natural gas in
Nevada, and serves the Las Vegas metropolitan area and northern Nevada.  In
addition, Southwest distributes and transports natural gas in portions of
California, including the Lake Tahoe area in northern California and high desert
and mountain areas in San Bernardino County.

Southwest purchases, transports, and distributes natural gas to approximately
1,165,000 residential, commercial, industrial and other customers, of which
57 percent are located in Arizona, 33 percent are in Nevada, and 10 percent are
in California. During the twelve months ended March 31, 1998, Southwest earned
56 percent of operating margin in Arizona, 34 percent in Nevada, and 10 percent
in California.  During this same period, Southwest earned 84 percent of
operating margin from residential and small commercial customers, 4 percent from
other sales customers, and 12 percent from transportation customers.  These
patterns are consistent with prior years and are expected to continue.

Northern is a full-service underground piping contractor which provides utility
companies with trenching and installation, replacement, and maintenance services
for energy distribution systems.

Capital Resources and Liquidity

The capital requirements and resources of the Company generally are determined
independently for the natural gas operations and construction services segments.
Each business activity is generally responsible for securing its own financing
sources. The capital requirements and resources of the construction services
segment are not material to the overall capital requirements and resources of
the Company.

Southwest continues to experience significant population growth throughout its
service territories.  This growth has required large amounts of capital to
finance the investment in infrastructure, in the form of new transmission and
distribution plant, to satisfy consumer demand.  For the twelve months ended
March 31, 1998, natural gas construction expenditures totaled $164 million.
Approximately 77 percent of these current-period expenditures represented new
construction and the balance represented costs associated with routine
replacement of existing transmission, distribution, and general plant.  Cash
flows from operating activities (net of dividends) provided $115 million of the
required capital resources pertaining to these construction expenditures.  The
remainder was provided from net external financing activities.

Southwest estimates construction expenditures during the three-year period
ending December 31, 2000 will be approximately $510 million.  During the three-
year period, cash flow from operating activities (net of dividends) is estimated
to fund approximately one-half of the gas operations total construction
expenditures.  A portion of the construction expenditure funding will be
provided by $26 million of funds held in trust, at December 31, 1997, from the
issuance of industrial development revenue bonds (IDRB).  The remaining cash
requirements 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 Southwest 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.  Differences between estimated and actual results are expected to
occur. Actual events, and the timing of those events, frequently do not occur as
expected, and can impact, favorably or unfavorably, anticipated cash flows.

                                       6<PAGE>

<PAGE>
Forward-Looking Statements

This report contains statements which constitute "forward-looking statements"
within the meaning of the Securities Litigation Reform Act of 1995 (Reform Act).
All such forward-looking statements are intended to be subject to the safe
harbor protection provided by the Reform Act.  A number of important factors
affecting the business and financial results of the Company could cause actual
results to differ materially from those stated in the forward-looking
statements.  These  factors include, but are not limited to, developments in the
legislative, regulatory and competitive environment, gas industry restructuring,
and weather.

Results of Consolidated Operations

Quarterly Analysis
                                      Contribution to Net Income
                                     Three Months Ended March 31,
                                    ------------------------------
                                        (Thousands of dollars)
                                        1998                1997
                                    ----------          ----------
Natural gas operations              $   35,657          $   22,536
Construction services                      296                (968)
                                    ----------          ----------
Net income                          $   35,953          $   21,568
                                    ==========          ==========

Net income for the first quarter of 1998 was a record $36 million or $1.31 per
share.  This was a $0.51 increase from per share earnings of $0.80 recorded
during the corresponding quarter of the prior year.  Earnings contributed from
natural gas operations increased $0.46 per share.  See separate discussion at
Results of Natural Gas Operations for changes as they relate to gas operations.
Construction services contributed per share earnings of $0.01 during the current
quarter, a $0.05 per share improvement over the corresponding quarter of the
prior year.  The increase primarily resulted from better-than-expected weather
conditions in several cold-climate operating areas which allowed construction
activities to begin earlier than anticipated.

                                       7<PAGE>

<PAGE>
Twelve-Month Analysis
                                      Contribution to Net Income
                                     Twelve Months Ended March 31,
                                     ----------------------------
                                        (Thousands of dollars)
                                        1998              1997
                                     ----------        ----------
Natural gas operations               $   28,946        $   11,596
Construction services                     1,908             1,687
                                     ----------        ----------
Net income                           $   30,854        $   13,283
                                     ==========        ==========

Earnings per share for the twelve months ended March 31, 1998 were $1.13, a
$0.63 increase from per share earnings of $0.50 recorded during the prior
twelve-month period.  Earnings contributed from natural gas operations increased
$0.62 per share.  See separate discussion at Results of Natural Gas Operations
for changes as they relate to gas operations. Construction services activities
contributed per share earnings of $0.07, a $0.01 per share improvement over the
prior twelve-month period.  The improvement is attributed to the commencement of
construction activities in several cold-climate operating areas earlier than
expected resulting from favorable winter weather conditions during the first
quarter of 1998. This increase was partially offset by a decline in revenues
resulting from project cancellations and curtailments during the second and
third quarters of 1997.

The following table sets forth the ratios of earnings to fixed charges for the
Company:

                                       For the Twelve Months Ended
                                       ---------------------------
                                       March 31,       December 31,
                                         1998              1997
                                       ---------       -----------
                               
Ratios of earnings to fixed charges       1.57             1.28

For the purposes of computing the ratios of earnings to fixed charges, earnings
are defined as the sum of pretax income from continuing operations plus fixed
charges.  Fixed charges consist of all interest expense including capitalized
interest, one-third of rent expense (which approximates the interest component
of such expense), preferred securities distributions, and amortized debt costs.

                                        8<PAGE>

<PAGE>
Results of Natural Gas Operations

Quarterly Analysis
                                                       Three Months Ended
                                                            March 31,
                                                   ---------------------------
                                                     (Thousands of dollars)
                                                      1998             1997
                                                   ----------       ----------
Gas operating revenues                             $  274,363       $  211,564
Net cost of gas sold                                  120,987           84,599
                                                   ----------       ----------
 Operating margin                                     153,376          126,965
Operations and maintenance expense                     50,850           48,448
Depreciation and amortization                          19,302           17,958
Taxes other than income taxes                           7,972            7,654
                                                   ----------       ----------
 Operating income                                      75,252           52,905
Other income (deductions), net                             11             (605)
                                                   ----------       ----------
 Income before interest and income taxes               75,263           52,300
Net interest deductions                                16,025           14,261
Preferred securities distributions                      1,369            1,369
Income tax expense                                     22,212           14,134
                                                   ----------       ----------
 Contribution to consolidated net income           $   35,657       $   22,536
                                                   ==========       ==========

Contribution to consolidated net income increased $13.1 million compared to the
first quarter of 1997.  The increase was the result of fundamental improvements
in operating margin coupled with favorable weather conditions, offset somewhat
by higher operating and financing expenses incurred as a result of the expansion
and upgrading of the gas system to accommodate continued customer growth.

Operating margin increased $26.4 million, or 21 percent, in the first quarter of
1998 compared to the same period a year ago.  Differences in heating demand
caused by weather variations between periods resulted in a $14 million increase.
Approximately $7 million was attributed to colder-than-normal temperatures
during the current period, and the remainder resulted from the prior period
being warmer than normal.  Arizona rate relief, resulting from a $32 million
annualized general rate case settlement effective September 1997, contributed $9
million in additional operating margin to the current period.  The rate relief
was significant from both a timing and a rate design perspective.  Nearly 70
percent of the annualized increase is nonweather dependent.  The remainder of
the improvement in operating margin was due to customer growth as Southwest
served 59,000, or five percent, more customers than a year ago.

Operations and maintenance expenses increased $2.4 million, or five percent,
reflecting general increases in labor and maintenance costs.

Depreciation expense and general taxes increased $1.7 million, or six percent,
as a result of construction activities.  Average gas plant in service increased
$136 million, or eight percent, as compared to the first quarter of 1997.  The
increase reflects ongoing capital expenditures for the upgrade of existing
operating facilities and the expansion of the system to accommodate continued
customer growth.

Net interest deductions increased $1.8 million, or 12 percent, over the prior
period.  This increase is primarily attributed to higher short-term borrowings
outstanding during the current quarter and an increase in long-term debt
reflecting medium-term note issuances during 1997 and the drawdown of IDRB funds
held in trust.  The increase in short-term debt reflects the need for short-term
financing to cover increased working capital requirements.

                                        9<PAGE>

<PAGE>
Twelve-Month Analysis
                                                      Twelve Months Ended
                                                            March 31,
                                                  ---------------------------
                                                     (Thousands of dollars)
                                                     1998             1997
                                                  ----------       ----------
Gas operating revenues                            $  677,464       $  569,573
Net cost of gas sold                                 245,726          193,710
                                                  ----------       ----------
 Operating margin                                    431,738          375,863
Operations and maintenance expense                   203,561          199,601
Depreciation and amortization                         75,872           68,862
Taxes other than income taxes                         29,711           28,216
                                                  ----------       ----------
 Operating income                                    122,594           79,184
Other income (deductions), net                       (12,363)          (1,444)
                                                  ----------       ----------
 Income before interest and income taxes             110,231           77,740
Net interest deductions                               63,515           54,311
Preferred securities distributions                     5,475            5,475
Income tax expense                                    12,295            6,358
                                                  ----------       ----------
 Contribution to consolidated net income          $   28,946       $   11,596
                                                  ==========       ==========

Contribution to consolidated net income increased $17.4 million compared to the
corresponding twelve-month period ended March 1997.  The increase was the result
of improvements in operating margin, offset somewhat by higher operating and
financing expenses.

Operating margin increased $55.9 million, or 15 percent, due to improved weather
conditions, rate relief, and customer growth.  Weather-related variances between
periods resulted in a $22 million increase.  Approximately $8 million was
attributed to colder-than-normal temperatures during the current twelve-month
period, and the remainder resulted from the prior period being warmer than
normal.  Rate relief contributed $24 million towards the increase, and customer
growth accounted for the remaining $10 million.

Operations and maintenance expenses increased $4 million, or two percent,
reflecting increases in labor and maintenance costs along with incremental
operating expenses associated with providing service to a steadily growing
customer base.

Depreciation expense and general taxes increased $8.5 million, or nine percent,
as a result of additional plant in service. Average gas plant in service for the
current twelve-month period increased $154 million, or ten percent, compared to
the corresponding period a year ago.  This was attributable to the upgrade of
existing operating facilities and the expansion of the system to accommodate new
customers being added to the system.

Net interest deductions increased $9.2 million, or 17 percent, during the twelve
months ended March 1998 over the comparative prior period.  The increase is
attributed primarily to an increase in average total debt outstanding during the
period due to the financing of construction expenditures and increased working
capital needs.

During the fourth quarter of 1997, Southwest recognized nonrecurring charges to
income related to cost overruns on two separate construction projects.  These
charges are reflected in Other income (deductions), net.  An $8 million
nonrecurring pretax charge resulted from cost overruns experienced during
expansion of the northern California service territory.  A second pretax charge,
for $5 million, related to cost overruns on a nonutility construction project.
See Note 11 of the Notes to Consolidated Financial Statements in the 1997 Annual
Report to Shareholders for additional disclosures related to these projects.
Partially offsetting these charges was the recognition of a $3.4 million income
tax benefit related to the successful settlement in November 1997 of open tax
issues dating back as far as 1988.  The combined impact of these three
nonrecurring events was a $4.1 million, or $0.15 per share, after-tax reduction
to earnings.

                                       10<PAGE>

<PAGE>
Rates and Regulatory Proceedings

  California

Northern California Expansion Project.  In 1995, Southwest initiated a multi-
year, three-phase construction project to expand its northern California service
territory and extend service into Truckee, California.  In July 1997, following
construction of the first two phases of the project, Southwest filed an
application requesting authorization from the California Public Utilities
Commission (CPUC) to modify the terms and conditions of the certificate of
public convenience and necessity granted by the CPUC in 1995.  In August 1997,
the Office of Ratepayer Advocates (ORA) filed a protest to the Southwest
application indicating that the terms of the original agreement should be
adhered to.

In January 1998, Southwest and the ORA executed a settlement agreement that, if
approved by the CPUC, will allow Southwest to commence the final phase of the
project.  Under the settlement, Southwest agreed, among other things, to absorb
$8 million in cost overruns experienced in Phase II of the project.  Southwest
also agreed to an $11 million cost cap for Phase III of the project.  A decision
by the CPUC on the settlement agreement is expected during the second quarter of
1998.

Based on the proposed settlement agreement, Southwest recognized an $8 million
nonrecurring pretax charge in the fourth quarter of 1997. See the Rates and
Regulatory Proceedings section of Management's Discussion and Analysis in the
1997 Annual Report to Shareholders for additional background information.

  PGA Filings

Arizona PGA Filing.  In March 1998, the Arizona Corporation Commission approved
a purchased gas adjustment (PGA) filing submitted by Southwest in January 1998
to recover deferred purchased gas costs in Arizona.  This filing, which became
effective in April 1998, will result in an annual increase of $46.9
million, or 14 percent.  The increase in rates is designed to recover the
accumulated PGA balance related to Arizona customers, and to eliminate the
refunds currently built into the rate structure.  PGA changes impact cash flows
but have no direct impact on profit margin.

Nevada PGA Filing.  In January 1997, Southwest submitted an out-of-period PGA
filing in Nevada, in response to a substantial run-up in the commodity cost of
natural gas during November and December of 1996.  In September 1997, the Public
Utilities Commission of Nevada (PUCN) approved the filing providing annual
increases of $10.1 million, or 9 percent, in the southern Nevada rate
jurisdiction, and $6 million, or 14 percent, in the northern Nevada rate
jurisdiction.

In June 1997, Southwest submitted its annual PGA filing in compliance with the
Nevada Gas Tariff.  The filing covered the period from April 1996 through March
1997.  Southwest requested annual increases of $23.1 million, or 18 percent, in
the southern Nevada rate jurisdiction, and $8.4 million, or 17 percent, in the
northern Nevada rate jurisdiction.

In an order issued in December 1997, the PUCN found that "Southwest failed to
mitigate the risk inherent in a portfolio of all indexed-priced contracts and
failed to reasonably quantify the costs of any risk mitigation."  As a result,
Southwest was ordered to reduce its cost of gas by $3.8 million in southern
Nevada and $1.8 million in northern Nevada.  The approved increase, after
consideration of the amounts disallowed, was $17.3 million, or 14 percent in
southern Nevada, and $5.2 million, or 11 percent in northern Nevada.

In December 1997, Southwest filed a Petition for Reconsideration (Petition) of
the decision with the PUCN on the grounds that the findings of fact and
conclusions of law are contrary to binding legislative enactments and judicial
decisions. Specifically, the Petition asserted, among other things, that the
PUCN violated its settled obligation in the previous PGA docket, which included
the same winter period, in finding Southwest to be imprudent.  Effectively, the
PUCN allowed a previously settled claim to be relitigated.  In addition,
management also believes that the PUCN failed to follow its previous rules and

                                       11<PAGE>

<PAGE>
practices surrounding a PGA proceeding, or changed those rules effective with
the disallowance order and sought to retroactively apply them, which would have
required compliance with formal rulemaking procedures mandated by Nevada
Statutes.  In February 1998, the PUCN reaffirmed the original order.

In March 1998, Southwest filed a petition for judicial review (appeal) of the
final order of the PUCN with the Nevada District Court.  The appeal alleges the
same procedural irregularities as were included in the Petition.  It is
anticipated that judicial review will take no less than six months from the date
of the filing and could take as long as two years depending on the civil trial
calendar of the Nevada District Court.

See Note 8 of the Notes to Consolidated Financial Statements in the 1997 Annual
Report to Shareholders for additional background information.

Management believes it is probable that the action taken to dispute the findings
of fact and conclusions of law in the order will result in the successful
outcome desired, specifically, that the order to exclude $5.6 million in gas
costs from the PGA balance will be reversed.  As a result, the financial
statements do not reflect any charges to effect the disallowance.

Recently Issued Accounting Pronouncements

In February 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards (SFAS) No. 132 "Employers' Disclosures about
Pensions and Other Postretirement Benefits."  SFAS No. 132 standardizes the
disclosure requirements for pensions and other postretirement benefits, requires
additional information to facilitate financial analysis, and eliminates certain
previously required disclosures.  It does not change measurement or recognition
of amounts related to those plans.  This statement is effective for 1998
reporting.  The disclosure requirements of this statement are not expected to
significantly change current reporting practices of the Company.

                                       12<PAGE>

<PAGE>
                                             PART II - OTHER INFORMATION

Items 1-5 None

Item 6    Exhibits and Reports on Form 8-K

          (a)  The following documents are filed as part of this report on 
               Form 10-Q:

                  Exhibit 12 - Computation of Ratios of Earnings to Fixed 
                  Charges and Ratios of Earnings to Combined Fixed Charges and 
                  Preferred Stock Dividends
          
                  Exhibit 27 - Financial Data Schedule (filed electronically 
                  only)

          (b)  Reports on Form 8-K

                  The Company filed a Form 8-K, dated April 15, 1998, indicating
                  that earnings for the quarter ended March 31, 1998 would 
                  exceed analysts' estimates.

                  The Company filed a Form 8-K, dated April 29, 1998, reporting 
                  summary financial information for the quarter ended 
                  March 31, 1998.





Pursuant to the requirements 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
                          ------------------------------------------------------
                                                (Registrant)



Date:  April 30, 1998




                                            /s/ Edward A. Janov                
                          ------------------------------------------------------
                                              Edward A. Janov
                          Vice President/Controller and Chief Accounting Officer

                                       13<PAGE>
  





                                       


<PAGE>                                                                      
<TABLE>
                                                                                                                       EXHIBIT 12
                                                         SOUTHWEST GAS CORPORATION
                                          COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES
                                                          (Thousands of dollars)
<CAPTION>

                                                                        For the Twelve Months Ended
                                                 ---------------------------------------------------------------------------------
                                                 March 31,                                 December 31,                           
                                                               -------------------------------------------------------------------
                                                    1998          1997          1996          1995          1994           1993
                                                 ----------    ----------    ----------    ----------     ---------     ----------
<S>                                              <C>           <C>           <C>           <C>            <C>           <C>
Continuing operations
 1. Fixed charges:
  A) Interest expense                            $   64,789    $   63,247    $   54,674    $   52,844     $  48,688     $   40,883
  B) Amortization                                     1,176         1,164         1,494         1,569         1,426          1,330
  C) Interest portion of rentals                      6,842         6,973         6,629         4,435         4,743          4,556
  D) Preferred securities distributions               5,475         5,475         5,475           913             -              -
                                                 ----------    ----------    ----------    ----------     ---------     ----------
   Total fixed charges                           $   78,282    $   76,859    $   68,272    $   59,761     $  54,857     $   46,769
                                                 ==========    ==========    ==========    ==========     =========     ==========

 2. Earnings (as defined):
  E) Pretax income from
   continuing operations                         $   44,640    $   21,328    $   10,448    $    3,493     $  38,119     $   21,959
  Fixed Charges (1. above)                           78,282        76,859        68,272        59,761        54,857         46,769
                                                 ----------    ----------    ----------    ----------     ---------     ----------
   Total earnings as defined                     $  122,922    $   98,187    $   78,720    $   63,254     $  92,976     $   68,728
                                                 ==========    ==========    ==========    ==========     =========     ==========
 
 3. Ratio of earnings to fixed charges                 1.57          1.28          1.15          1.06          1.69           1.47
                                                 ==========    ==========    ==========    ==========     =========     ==========




                                                                        For the Twelve Months Ended
                                                 ---------------------------------------------------------------------------------
                                                 March 31,                                 December 31,                     
                                                               -------------------------------------------------------------------
                                                   1998          1997           1996          1995           1994           1993 
                                                 ----------    ----------    ----------    ----------     ---------     ----------
Adjusted for interest allocated to                                                 
discontinued operations                               
 1. Fixed charges:
  A) Interest expense                            $   64,789    $   63,247    $   54,674    $   52,844     $  48,688     $   40,883
  B) Amortization                                     1,176         1,164         1,494         1,569         1,426          1,330
  C) Interest portion of rentals                      6,842         6,973         6,629         4,435         4,743          4,556
  D) Preferred securities distributions               5,475         5,475         5,475           913             -              -
  E) Allocated interest [1]                               -             -             -         9,636         7,874          7,874
                                                 ----------    ----------    ----------    ----------      --------     ----------
   Total fixed charges                           $   78,282    $   76,859    $   68,272    $   69,397     $  62,731     $   54,643
                                                 ==========    ==========    ==========    ==========     =========     ==========
 2. Earnings (as defined):
  F) Pretax income from
   continuing operations                         $   44,640    $   21,328    $   10,448    $    3,493     $  38,119     $   21,959
  Fixed Charges (1. above)                           78,282        76,859        68,272        69,397        62,731         54,643
                                                 ----------    ----------    ----------    ----------      --------     ----------
   Total earnings as defined                     $  122,922    $   98,187    $   78,720    $   72,890     $ 100,850     $   76,602
                                                 ==========    ==========    ==========    ==========     =========     ==========
 3. Ratio of earnings to fixed charges                 1.57          1.28          1.15          1.05          1.61           1.40
                                                 ==========    ==========    ==========    ==========     =========     ==========


[1] Represents allocated interest through the period ended December 31, 1995.  Carrying costs for the
period subsequent to year end through the disposition of the discontinued operations were accrued and
recorded as disposal costs.
/TABLE
<PAGE>

<PAGE>
<TABLE>
                                                                              
                                                                                                                     EXHIBIT 12
                                                         SOUTHWEST GAS CORPORATION
                         COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS
                                                           (Thousands of dollars)
<CAPTION>


                                                                                 For the Twelve Months Ended
                                                  -------------------------------------------------------------------------------
                                                  March 31,                                December 31,
                                                                -----------------------------------------------------------------
                                                    1998           1997          1996          1995          1994          1993
                                                  ---------     ---------     ---------     ---------     ---------     ---------
<S>                                               <C>           <C>           <C>           <C>           <C>           <C>
Continuing operations
 1. Combined fixed charges:
  A) Total fixed charges                          $  78,282     $  76,859     $  68,272     $  59,761     $  54,857     $  46,769
  B) Preferred dividends [1]                              -             -             -           404           826         1,183
                                                  ---------     ---------     ---------     ---------     ---------     ---------
   Total fixed charges and
    preferred dividends                           $  78,282     $  76,859     $  68,272     $  60,165     $  55,683     $  47,952
                                                  =========     =========     =========     =========     =========     =========
 2. Earnings                                      $ 122,922     $  98,187     $  78,720     $  63,254     $  92,976     $  68,728
                                                  =========     =========     =========     =========     =========     =========
 3. Ratio of earnings to fixed charges
  and preferred dividends                              1.57          1.28          1.15          1.05          1.67          1.43
                                                  =========     =========     =========     =========     =========     =========




                                                                                 For the Twelve Months Ended
                                                  -------------------------------------------------------------------------------
                                                  March 31,                                December 31,
                                                                -----------------------------------------------------------------
                                                    1998           1997          1996          1995          1994          1993
                                                  ---------     ---------     ---------     ---------     ---------     ---------

Adjusted for interest allocated to
 discontinued operations
 1. Combined fixed charges:
  A) Total fixed charges                          $  78,282     $  76,859     $  68,272     $  69,397     $  62,731     $  54,643
  B) Preferred dividends [1]                              -             -             -           404           826         1,183
                                                  ---------     ---------     ---------     ---------     ---------     ---------
   Total fixed charges and
    preferred dividends                           $  78,282     $  76,859     $  68,272     $  69,801     $  63,557     $  55,826
                                                  =========     =========     =========     =========     =========     =========

 2. Earnings                                      $ 122,922     $  98,187     $  78,720     $  72,890     $ 100,850     $  76,602
                                                  =========     =========     =========     =========     =========     =========

 3. Ratio of earnings to fixed charges
  and preferred dividends                              1.57          1.28          1.15          1.04          1.59          1.37
                                                  =========     =========     =========     =========     =========     =========


[1]  Preferred and preference dividends have been adjusted to represent the pretax earnings necessary
to cover such dividend requirements.
/TABLE
<PAGE>


<TABLE> <S> <C>

<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from Southwest
Gas Corporation's Form 10-Q for the quarter ended March 31, 1998 and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,377,368
<OTHER-PROPERTY-AND-INVEST>                     67,585
<TOTAL-CURRENT-ASSETS>                         245,542
<TOTAL-DEFERRED-CHARGES>                        54,842
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               1,745,337
<COMMON>                                        29,151
<CAPITAL-SURPLUS-PAID-IN>                      362,891
<RETAINED-EARNINGS>                             26,581
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 418,623
                                0
                                          0
<LONG-TERM-DEBT-NET>                           778,485
<SHORT-TERM-NOTES>                              78,000
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                    5,215
                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 465,014<F1>
<TOT-CAPITALIZATION-AND-LIAB>                1,745,337
<GROSS-OPERATING-REVENUE>                      292,601
<INCOME-TAX-EXPENSE>                            22,502
<OTHER-OPERATING-EXPENSES>                     217,099
<TOTAL-OPERATING-EXPENSES>                     217,099
<OPERATING-INCOME-LOSS>                         75,502
<OTHER-INCOME-NET>                                (767)<F2>
<INCOME-BEFORE-INTEREST-EXPEN>                  74,735
<TOTAL-INTEREST-EXPENSE>                        16,280
<NET-INCOME>                                    35,953
                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   35,953
<COMMON-STOCK-DIVIDENDS>                         5,623
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                         108,562
<EPS-PRIMARY>                                     1.31<F3>
<EPS-DILUTED>                                     1.30
<FN>
<F1>Includes: trust originated preferred securities of $60,000, current
liabilities, net of current long-term debt maturities and short-term debt, of
$182,432, and deferred income taxes and other credits of $222,582.
<F2>Includes distributions related to trust originated preferred securities of
$1,369.
<F3>Primary earnings per share is equal to basic earnings per share.
</FN>
         <PAGE>


</TABLE>


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