TUCSON ELECTRIC POWER CO
10-Q, 1997-11-10
ELECTRIC SERVICES
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                                UNITED STATES        
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549

                                  FORM 10-Q
                                        
 (Mark One)
   [X]                   QUARTERLY REPORT PURSUANT TO
                            SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934
                                        
               For The Quarterly Period Ended September 30, 1997
                                        
                                       OR
                                        
   [ ]                   TRANSITION REPORT PURSUANT TO
                            SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934
                                        
            For the transition period from __________ to __________.
                                        
                                        
                          Commission File Number 1-5924
                                        
                                        
                          TUCSON ELECTRIC POWER COMPANY
             (Exact Name of Registrant as Specified in its Charter)
                                        
                    ARIZONA                       86-0062700
        (State or Other Jurisdiction of         (IRS Employer
        Incorporation or Organization)       Identification No.)
                                                       
    220 WEST SIXTH STREET, TUCSON, ARIZONA       P.O. BOX 711
                     85701                          85702
   (Address of Principal Executive Offices)       (Zip Code)
                                        
                                 (520) 571-4000
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)
                                        
                                        
                                        
     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 _____

     At November 5, 1997, 32,139,434 shares of the registrant's Common Stock,
no par value (the only class of Common Stock), were outstanding.






                               TABLE OF CONTENTS
                                                                       Page
                                                                      ------

Definitions.............................................................iii
Independent Accountants' Review Report....................................1

                         PART I - FINANCIAL INFORMATION

Item 1.  -- Financial Statements
     Comparative Condensed Consolidated Statements of Income..............2
     Comparative Condensed Consolidated Statements of Cash Flows..........3
     Comparative Condensed Consolidated Balance Sheets....................4
     Notes to Condensed Consolidated Financial Statements
     Note 1.  Tax Assessments.............................................5
     Note 2.  Rate Matters................................................5
     Note 3.  Springerville Coal Contract.................................6
     Note 4.  Consolidated Subsidiaries...................................6
     Note 5.  Long-Term Debt..............................................6
     Note 6.  Income Taxes................................................7
     Note 7.  New Accounting Standard.....................................8
     Note 8.  Reclassifications...........................................8

Item 2.  -- Management's Discussion and Analysis of Financial Condition and
Results of Operations
     Overview.............................................................9
     Competition
         Wholesale.......................................................10
         Retail..........................................................11
     Holding Company Proposal............................................14
     Retail Rate Proposal................................................14
     Accounting for the Effects of Regulation............................15


     Investments in Energy Related Ventures..............................15
     Dividends on Common Stock...........................................16
     Earnings............................................................17
Results of Operations
     Results of Utility Operations
         Sales and Revenues..............................................18
         Operating Expenses..............................................19
         Other Income....................................................20
          Interest Expense...............................................20
     Events Affecting Future Results of Utility Operations
         NTUA Wholesale Power Contract...................................20
         Springerville Coal Supply Contract..............................21
Liquidity and Capital Resources..........................................21
     Cash Flows..........................................................21
     Financing Developments
         Sale of New Bonds...............................................22
         Financing Application Filed with ACC............................23
Year 2000 Issue..........................................................24
Safe Harbor for Forward-Looking Statements...............................24

                          PART II - OTHER INFORMATION

Item 1. -- Legal Proceedings
        Tax Assessments..................................................25
Item 6.  -- Exhibits and Reports on Form 8-K.............................25
Signature Page...........................................................26
Exhibit Index............................................................27


                                  DEFINITIONS

The abbreviations and acronyms used in the 1997 Third Quarter Form 10-Q are
defined below:
- ----------------------------------------------------------------------------

ACC....................   Arizona Corporation Commission.
ADOR...................   Arizona Department of Revenue.
AET....................   Advanced Energy Technologies, Inc.
Common Stock...........   The Company's common stock, without par value.
Company or TEP.........   Tucson Electric Power Company.
EITF...................   Emerging Issues Task Force of the Financial 
                          Accounting Standards Board.
FAS 71.................   Statement of Financial Accounting Standards #71:
                          Accounting for the Effects of Certain Types of
                          Regulation.
FAS 101................   Statement of Financial Accounting Standards #101:
                          Regulated Enterprises - Accounting for the
                          Discontinuation of Application of FAS 71.
FAS 121................   Statement of Financial Accounting Standards #121:
                          Accounting for the Impairment of Long-Lived Assets
                          and for Long-Lived Assets to be Disposed Of.
FERC...................   Federal Energy Regulatory Commission.
First Mortgage Bonds...   First mortgage bonds issued under the General First
                          Mortgage.
General First Mortgage.   The Indenture, dated as of April 1, 1941, of Tucson
                          Gas,Electric Light and Power Company to The Chase 
                          National Bank of the City of New York, as trustee,
                          as supplemented and amended.
IDBs...................   Industrial development revenue or pollution control
                          bonds.
Irvington..............   Irvington Generating Station.
Irvington Lease........   The leveraged lease arrangement relating to Irvington
                          Unit 4.
kWh....................   Kilowatt-hour(s).
MEH....................   Millenium Energy Holdings, Inc.
MRA....................   Master restructuring agreement between the Company 
                          and the Banks which includes the Renewable Term Loan,
                          Revolving Credit and certain replacement 
                          reimbursement agreements.
MSR....................   Modesto, Santa Clara and Redding Public Power Agency.
MW.....................   Megawatt(s).
NEV....................   New Energy Ventures, LLC.
1994 Rate Order........   ACC Rate Order concerning an increase in the 
                          Company's retail base rates and certain regulatory 
                          write-offs, issued January 11, 1994.
1996 Rate Order........   ACC Rate Order concerning an
                          increase in the Company's retail base rates and the
                          recovery of Springerville Unit 2 costs, issued March 
                          29, 1996.
NTUA...................   Navajo Tribal Utility Authority.
NOL....................   Net Operating Loss carryforward for income tax 
                          purposes.
Renewable Term Loan....   Credit facility that replaced the Term Loan pursuant
                          to the MRA Sixth Amendment, dated as of November 1, 
                          1994, and effective March 7, 1995.
Revolving Credit.......   $50 million revolving credit facility entered into
                          between a syndicate of banks and the Company.
SEC....................   Securities and Exchange Commission.
Shareholders...........   Holders of Common Stock.
Springerville..........   Springerville Generating Station.
Springerville Coal 
 Handling Facilities
 Leases................   Leveraged lease arrangements relating to the coal
                          handling facilities serving Springerville.
Springerville Common 
 Facilities Leases.....   Leveraged lease arrangements relating to one-half
                          interest in certain facilities at Springerville used
                          in common with Springerville Unit 1 and Springerville
                          Unit 2.
Springerville Unit 1 
 Leases................   Leveraged lease arrangements relating to
                          Springerville Unit 1, and one half interest in 
                          certain facilities at Springerville used in common 
                          with Springerville Unit 1 and Springerville Unit 2.
SSP....................   Shared Savings Proposal filed with the ACC July 9, 
                          1997 requesting a 1.1% annual retail rate reduction.
Valencia...............   Valencia Energy Company, previously a wholly owned
                          subsidiary of the Company, merged into the Company on
                          May 31, 1996.
VSP....................   Voluntary Severance Plan offered to Company employees
                          and implemented in May 1996.
WSCC...................   Western Systems Coordinating Council.





INDEPENDENT ACCOUNTANTS' REVIEW REPORT

Tucson Electric Power Company and its Stockholders
220 West Sixth Street
Tucson, Arizona 85701

We have reviewed the accompanying condensed consolidated balance sheet of 
Tucson Electric Power Company and subsidiaries (the Company) as of September
30, 1997 and the related condensed consolidated statements of income for the 
three-month and nine-month periods ended September 30, 1997 and 1996 and cash 
flows for the nine-month periods ended September 30, 1997 and 1996.  These 
financial statements are the responsibility of the Company's management.

We conducted our review in accordance with standards established by the 
American Institute of Certified Public Accountants.  A review of interim 
financial information consists principally of applying analytical procedures to
financial data and of making inquiries of persons responsible for financial and
accounting matters.  It is substantially less in scope than an audit conducted
in accordance with generally accepted auditing standards, the objective of 
which is the expression of an opinion regarding the financial statements taken
as a whole.  Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should
be made to such condensed consolidated financial statements for them to be in
conformity with generally accepted accounting principles.

We have previously audited, in accordance with generally accepted auditing
standards, the consolidated balance sheet and statement of capitalization of
the Company as of December 31, 1996 and the related consolidated statements of
income, cash flows, and changes in stockholders' equity (deficit) for the year
then ended (not presented herein); and in our report dated January 27, 1997, we
expressed an unqualified opinion on those consolidated financial statements.  In
our opinion, the information set forth in the accompanying condensed
consolidated balance sheet as of December 31, 1996 is fairly stated, in all
material respects, in relation to the consolidated balance sheet from which it
has been derived.



DELOITTE & TOUCHE LLP
Tucson, Arizona
October 20, 1997
























<PAGE>
                        PART I - FINANCIAL INFORMATION

Item 1.  FINANCIAL STATEMENTS
- -----------------------------------------------------------------------------

     The September 30 condensed consolidated financial statements are
unaudited but reflect all normal recurring accruals and other adjustments
which are, in the opinion of management, necessary for a fair presentation of
the results for the interim periods covered.  Due to seasonal fluctuations in
sales, the quarterly results are not indicative of annual operating results.
Also see Item 2. - Management's Discussion and Analysis of Financial
Condition and Results of Operations.  This quarterly report should be
reviewed in conjunction with the Company's 1996 Form 10-K.

COMPARATIVE CONDENSED CONSOLIDATED STATEMENTS OF INCOME

                                                       Three Months Ended
                                                           September 30,
                                                         1997       1996
                                                     -Thousands of Dollars-
Operating Revenues
 Retail Customers                                     $201,566    $195,261
 Amortization of MSR Option Gain Regulatory Liability        -       5,014
 Sales for Resale                                       29,523      22,803
                                                      ---------   ---------
    Total Operating Revenues                           231,089     223,078
                                                      ---------   ---------
Operating Expenses
 Fuel and Purchased Power                               66,243      60,198
 Capital Lease Expense                                  25,786      25,824
 Amortization of Springerville Unit 1 Allowance         (7,009)     (7,273)
 Other Operations                                       28,402      23,535
 Maintenance and Repairs                                 8,284       7,991
 Depreciation and Amortization                          21,598      24,735
 Taxes Other Than Income Taxes                          12,517      21,573
 Voluntary Severance Plan Expense(Gain)                      -      (3,443)
 Income Taxes                                           19,158      17,322
                                                      ---------   ---------
    Total Operating Expenses                           174,979     170,462
                                                      ---------   ---------
      Operating Income                                  56,110      52,616
                                                      ---------   ---------

Other Income (Deductions)
 Income Taxes                                           13,337      66,510
 Reversal of Loss Provision                                  -       8,472
 Interest Income                                         2,035       1,264
 Other Income (Deductions)                              (1,214)        637
                                                      ---------   ---------
    Total Other Income (Deductions)                     14,158      76,883
                                                      ---------   ---------

Interest Expense
 Long-Term Debt - Net                                   16,935      14,843
 Interest Imputed on Losses Recorded at Present Value    8,101       8,006
 Other Interest Expense                                  1,817       4,152
                                                      ---------   ---------
    Total Interest Expense                              26,853      27,001
                                                      ---------   ---------

Net Income                                            $ 43,415    $102,498
                                                      =========   =========


Average Shares of Common Stock Outstanding (000)        32,136      32,133
                                                      =========   =========

Net Income per Average Share                          $   1.35    $   3.19
                                                      =========   =========



See Notes to Condensed Consolidated Financial Statements.

COMPARATIVE CONDENSED CONSOLIDATED STATEMENTS OF INCOME

                                                       Nine Months Ended
                                                           September 30,
                                                         1997       1996
                                                     -Thousands of Dollars-
Operating Revenues
 Retail Customers                                     $490,752    $482,511
 Amortization of MSR Option Gain Regulatory Liability    8,105      15,040
 Sales for Resale                                       69,483      58,088
                                                      ---------   ---------
    Total Operating Revenues                           568,340     555,639
                                                      ---------   ---------
Operating Expenses
 Fuel and Purchased Power                              163,382     156,128
 Capital Lease Expense                                  78,450      78,073
 Amortization of Springerville Unit 1 Allowance        (21,028)    (21,818)
 Other Operations                                       82,785      71,983
 Maintenance and Repairs                                29,899      26,345
 Depreciation and Amortization                          64,817      73,285
 Taxes Other Than Income Taxes                          38,235      51,310
 Voluntary Severance Plan Expense(Gain)                      -      10,555
 Income Taxes                                           21,070      12,934
                                                      ---------   ---------
    Total Operating Expenses                           457,610     458,795
                                                      ---------   ---------
      Operating Income                                 110,730      96,844
                                                      ---------   ---------

Other Income (Deductions)
 Income Taxes                                           39,280      80,371
 Reversal of Loss Provision                             10,154       8,472
 Interest Income                                         6,434       4,166
 Other Income (Deductions)                              (3,149)        706
                                                      ---------   ---------
    Total Other Income (Deductions)                     52,719      93,715
                                                      ---------   ---------

Interest Expense
 Long-Term Debt - Net                                   47,505      44,600
 Interest Imputed on Losses Recorded at Present Value   24,555      24,592
 Other Interest Expense                                  6,581       8,161
                                                      ---------   ---------
    Total Interest Expense                              78,641      77,353
                                                      ---------   ---------

Net Income                                            $ 84,808    $113,206
                                                      =========   =========


Average Shares of Common Stock Outstanding (000)        32,135      32,133
                                                      =========   =========

Net Income per Average Share                          $   2.64    $   3.52
                                                      =========   =========



See Notes to Condensed Consolidated Financial Statements.

COMPARATIVE CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

                                                       Nine Months Ended
                                                           September 30,
                                                         1997       1996
                                                     -Thousands of Dollars-
Cash Flows from Operating Activities
  Cash Receipts from Retail Customers                 $496,765    $491,791
  Cash Receipts from Sales for Resale                   67,850      56,096
  Fuel and Purchased Power Costs Paid                 (154,333)   (137,145)
  Wages Paid, Net of Amounts Capitalized               (48,115)    (61,657)
  Payment of Other Operations and Maintenance Costs    (68,277)    (56,420)
  Capital Lease Interest Paid                          (80,469)    (83,200)
  Interest Paid, Net of Amounts Capitalized            (47,057)    (49,153)
  Taxes Paid, Net of Amounts Capitalized               (60,735)    (65,612)
  Contract Termination Fee Paid                        (40,000)          -
  Emission Allowance Inventory Sale                          -       4,120
  Interest Received                                      6,344       4,716
  Income Taxes Paid                                     (1,050)     (1,066)
  Other                                                  1,529      (3,101)
                                                      ---------   ---------
    Net Cash Flows - Operating Activities               72,452      99,369
                                                      ---------   ---------

Cash Flows from Investing Activities
  Construction Expenditures                            (47,937)    (51,092)
  Investments in and Loans to Joint Ventures            (3,998)     (6,116)
  Other                                                  1,567         250
                                                      ---------   ---------
    Net Cash Flows - Investing Activities              (50,368)    (56,958)
                                                      ---------   ---------

Cash Flows from Financing Activities
  Proceeds from Issuance of Long-Term Debt             125,067      31,400
  Proceeds from Borrowings on the Renewable Term Loan        -      14,000
  Payments to Retire Long-Term Debt                   (112,310)    (25,575)
  Payments on Renewable Term Loan                      (31,000)    (14,000)
  Payments to Retire Capital Lease Obligations         (13,969)    (35,629)
  Other                                                   (381)        297
                                                      ---------   ---------
    Net Cash Flows - Financing Activities              (32,593)    (29,507)
                                                      ---------   ---------

Net Increase (Decrease) in Cash and Cash Equivalents   (10,509)     12,904
Cash and Cash Equivalents, Beginning of Year           130,291      85,094
                                                      ---------   ---------
Cash and Cash Equivalents, End of Period              $119,782    $ 97,998
                                                      =========   =========










See Notes to Condensed Consolidated Financial Statements.

SUPPLEMENTAL CONDENSED CONSOLIDATED CASH FLOW INFORMATION


                                                       Nine Months Ended
                                                           September 30,
                                                         1997       1996
                                                     -Thousands of Dollars-

Net Income                                            $ 84,808   $ 113,206
Adjustments to Reconcile Net Income to Net Cash Flows
  Depreciation and Amortization Expense                 64,817      73,285
  Deferred Income Taxes and
   Investment Tax Credits - Net                        (19,260)    (68,504)
  Lease Payments Deferred                                6,771       3,386
  Regulatory Amortizations, Net of Interest Imputed
   on Losses Recorded at Present Value                  (4,578)    (12,266)
  Contract Termination Fee                             (39,038)          -
  Reversal of Loss Provision                           (10,154)     (8,472)
  Other                                                   (279)     (2,673)
  Changes in Assets and Liabilities which Provided
   (Used) Cash Exclusive of Changes Shown Separately
    Accounts Receivable                                (34,964)    (25,611)
    Materials and Fuel                                  (6,900)      1,291
    Accounts Payable                                     7,805         582
    Taxes Accrued                                       15,386      25,313
    Other Current Assets and Liabilities                 4,678      (7,717)
    Other Deferred Assets and Liabilities                3,360       7,549
                                                      ---------   ---------
Net Cash Flows - Operating Activities                 $ 72,452    $ 99,369
                                                      =========   =========




























See Notes to Condensed Consolidated Financial Statements.

COMPARATIVE CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS
                                                September 30,  December 31,
                                                       1997        1996
                                                   - Thousands of Dollars -
Utility Plant
  Plant in Service                                  $2,156,454  $2,129,205
  Utility Plant Under Capital Leases                   893,064     893,064
  Construction Work in Progress                         84,181      74,210
                                                    ----------- -----------
    Total Utility Plant                              3,133,699   3,096,479
  Less Accumulated Depreciation and Amortization      (965,695)   (922,947)
  Less Accumulated Amortization of Capital Leases      (69,267)    (56,240)
  Less Springerville Unit 1 Allowance                 (166,664)   (163,388)
                                                    ----------- -----------
    Total Utility Plant - Net                        1,932,073   1,953,904
                                                    ----------- -----------

Investments and Other Property                          71,372      69,289
                                                    ----------- -----------

Current Assets
  Cash and Cash Equivalents                            119,782     130,291
  Accounts Receivable                                  100,869      65,905
  Materials and Fuel                                    37,256      30,356
  Deferred Income Taxes - Current                        6,981      10,223
  Other                                                 14,879      14,026
                                                    ----------- -----------
    Total Current Assets                               279,767     250,801
                                                    ----------- -----------

Deferred Debits - Regulatory Assets
  Income Taxes Recoverable Through Future Rates        171,921     173,731
  Deferred Common Facility Costs                        58,857      60,762
  Deferred Contract Termination Fee                     49,038           -
  Deferred Springerville Unit 2 Costs                   13,913      21,260
  Deferred Lease Expense                                12,332      15,067
  Other Deferred Regulatory Assets                       8,472       8,004
Deferred Debits - Other                                 16,399      15,723
                                                    ----------- -----------
    Total Deferred Debits                              330,932     294,547
                                                    ----------- -----------
Total Assets                                        $2,614,144  $2,568,541
                                                    =========== ===========













See Notes to Condensed Consolidated Financial Statements.

COMPARATIVE CONDENSED CONSOLIDATED BALANCE SHEETS

CAPITALIZATION AND OTHER LIABILITIES
                                                September 30,  December 31,
                                                       1997        1996
                                                   - Thousands of Dollars -
Capitalization
  Common Stock                                      $  645,296  $  645,243
  Capital Stock Expense                                 (6,357)     (6,357)
  Accumulated Deficit                                 (420,790)   (505,598)
                                                    ----------- -----------
  Common Stock Equity                                  218,149     133,288
  Capital Lease Obligations                            887,820     895,867
  Long-Term Debt                                     1,205,951   1,223,025
                                                    ----------- -----------
    Total Capitalization                             2,311,920   2,252,180
                                                    ----------- -----------

Current Liabilities
  Short-Term Debt                                            -       3,567
  Current Obligations Under Capital Leases              15,163      10,383
  Current Maturities of Long-Term Debt                     500       1,635
  Accounts Payable                                      36,611      28,806
  Interest Accrued                                      45,447      57,404
  Taxes Accrued                                         39,393      24,007
  Contract Termination Fee Payable                      10,000           -
  Other                                                 16,462      15,614
                                                    ----------- -----------
    Total Current Liabilities                          163,576     141,416
                                                    ----------- -----------

Deferred Credits and Other Liabilities
  Deferred Income Taxes - Noncurrent                    74,722      96,422
  Accumulated Deferred Investment Tax Credits
   Regulatory Liability                                 12,576      15,188
  MSR Option Gain Regulatory Liability                       -       7,853
  Other Regulatory Liabilities                          17,602      17,596
  Other                                                 33,748      37,886
                                                    ----------- -----------
    Total Deferred Credits and Other Liabilities       138,648     174,945
                                                    ----------- -----------
Total Capitalization and Other Liabilities          $2,614,144  $2,568,541
                                                    =========== ===========















See Notes to Condensed Consolidated Financial Statements.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
- -----------------------------------------------------------------------------

NOTE 1.  TAX ASSESSMENTS
- ------------------------

Ruling on Arizona Sales Tax Assessments - Coal Sales

     The Arizona Department of Revenue (ADOR) issued transaction privilege
(sales) tax assessments to the Company alleging that Valencia was liable for
sales tax on gross income received from coal sales, transportation and coal-
handling services to the Company for the period November 1985 through May
1996. The Company protested these assessments.  On September 12, 1996, the
Arizona Court of Appeals upheld the validity of the assessment issued for the
period November 1985 through March 1990.  On July 1, 1997, the Arizona
Supreme Court granted a Petition for Review filed by the Company.  Oral
argument for the Petition for Review is scheduled to begin December 18, 1997.
Additionally, the Company is protesting the assessments for the period April
1990 through May 1996.

     Previously, the Company had recorded an expense through the Consolidated
Statements of Income and related liability for the amount of sales taxes and
interest thereon which the Company believed was probable of incurrence for
the period November 1985 through May 1996.  Generally, Arizona law requires
payment of an assessment prior to pursuing the appellate process.  The
Company has previously paid, under protest, a total of $23 million of the
disputed sales tax assessments, subject to refund in the event the Company
prevails.

     On May 31, 1996, Valencia was merged into the Company.  Effective with
the merger, Valencia no longer supplies coal to the Company.  Instead the
Company acquires coal directly from the supplier.  As a result, the Company
believes it is not liable for sales tax computed on a basis similar to the
assessments described above subsequent to May 31, 1996.  For periods
subsequent to May 31, 1996, the Company continues to record an estimated
interest expense on the above assessments.

Arizona Sales Tax Assessments - Leases

     The ADOR has issued transaction privilege (sales) tax assessments to the
lessors from whom the Company leases certain property.  The assessments
allege sales tax liability on a component of rents paid by the Company on the
Springerville Unit 1 Leases, Springerville Common Facilities Leases,
Irvington Lease and Springerville Coal Handling Facilities Leases.
Assessments cover the period August 1, 1988 to September 30, 1993.  Pursuant
to indemnification provisions of the lease agreements, if the ADOR prevails
the Company must reimburse the lessors for taxes paid by them.

     In the opinion of management, the Company has recorded, through the
Consolidated Statements of Income in current and prior years, a liability for
the amount of sales taxes and interest thereon for which the Company believes
incurrence is probable as of September 30, 1997.  In the event that the
assessments by the ADOR are sustained, an additional liability would result.
Although it is reasonably possible that the ultimate resolution of such
matter could result in additional sales tax expense of up to approximately
$21 million in excess of amounts recorded, management and outside tax counsel
believe that the Company has meritorious defenses to mitigate or eliminate
the assessed amounts.

     Based on the current status of the legal proceedings, the Company
believes that the ultimate resolution of such dispute will occur over a
period of two to four years. Based on consultations with counsel and
considering the amounts already accrued, the Company believes that the
resolution of this tax matter should not have a material adverse effect on
the Company's Consolidated Financial Statements.


NOTE 2.  RATE MATTERS
- ---------------------

     On July 9, 1997, the Company filed with the ACC a request for an annual
rate reduction of $6.8 million (or 1.1%) for retail customers.  This filing
is in the form of a Shared Savings Proposal (SSP) which promotes a sharing of
benefits with customers of cost containment efforts and the mitigation of
potential stranded costs associated with the introduction of retail electric
competition in Arizona.  The cost containment savings were realized primarily
from renegotiated fuel contracts and the Company's Voluntary Severance
Program, which reduced the Company's workforce by approximately 15%.  No date
has been set for formal consideration of the matter by the ACC.

     The Company proposed that additional savings be used by the Company to
mitigate potential stranded costs through accelerated amortization of retail
excess capacity deferrals.  Retail excess capacity deferrals represent those
operating and capital costs associated with Springerville Unit 2 capacity,
which were deemed by the ACC to not be recoverable in retail rates prior to
the 1994 and 1996 Rate Orders.  Such retail excess capacity deferrals totaled
$89.9 million and $93.6 million at September 30, 1997 and December 31, 1996,
respectively.  Such deferrals are not reflected in the accompanying Condensed
Consolidated Balance Sheets because such retail excess capacity deferrals,
while deferred for regulatory purposes, were not deferred for financial
reporting purposes but were expensed as incurred.  The proposed $7.2 million
increase in annual amortization expense for such excess capacity deferrals
would decrease the amortization period from 20 years to 7.76 years.  The
proposed increase in amortization expense would be reflected in the Company's
regulatory accounting records but would have no impact on the expenses
included in the Company's financial accounting statements.


NOTE 3.  SPRINGERVILLE COAL CONTRACT
- ------------------------------------

     On June 27, 1997, the Company signed an agreement with the coal supplier
for the Springerville Generating Station to terminate the existing coal
supply contract and enter into a new, more cost effective contract with the
same supplier.  A $50 million termination fee was incurred by the Company and
is payable in three installments: $30 million paid on June 30, 1997, $10
million paid on September 30, 1997, and $10 million due March 31, 1998.  The
previous coal supply contract covered the useful lives of Springerville Units
1 and 2 and contained a bilateral option to renegotiate the contract price
and escalation procedures in 2009 and every five years thereafter.  The new
coal contract has an initial term of 13 years, beginning July 1, 1997, with
an option to extend ten years thereafter. The new contract also contains more
favorable terms to the Company for certain volume, incremental volume, base
price, incremental price and price adjustment mechanism requirements.

     The Company applied, as part of the SSP, to the ACC requesting that the
termination fee be recorded as a regulatory asset and amortized to fuel
expense over the 13-year term of the new agreement.  On July 29, 1997, the
ACC issued an interim accounting order allowing the Company to defer the $50
million termination fee as a regulatory asset in the Company's Condensed
Consolidated Balance Sheet until the ACC decides whether the $50 million
termination fee should be recovered through retail rates.  The interim
accounting order also allowed the Company to begin amortizing the termination
fee to fuel expense.  If the ACC ultimately disallows recovery, the
unamortized portion of the $50 million termination fee would immediately be
expensed.  No date has been set for formal consideration of the matter by the
ACC.


NOTE 4.  CONSOLIDATED SUBSIDIARIES
- ----------------------------------

      Upon  dissolution of certain subsidiaries which formed a  part  of  the
Company's former investment operations, in June 1997, the Company reversed  a
provision  for  loss,  recorded  in  prior  years,  resulting  in  income  of
approximately $10.2 million.

     Effective September 1, 1997, Millenium Energy Holdings, Inc. (MEH), a
wholly owned subsidiary of the Company, exercised an option to acquire a 50%
ownership in New Energy Ventures, LLC (NEV).  NEV is a buyer's agent
providing load aggregation and advisory services to energy consumers.
Concurrently with the exercise of the option, MEH made a capital contribution
in the amount of $0.8 million and extended a $3.0 million member loan to NEV.
The investment in NEV is included in the Company's Condensed Consolidated
Balance Sheet at September 30, 1997 under Investments and Other Property and
in the Company's Condensed Consolidated Statement of Cash Flows for the nine
months ended September 30, 1997 as Investments in and Loans to Joint
Ventures.


NOTE 5.  LONG-TERM DEBT
- -----------------------

     In February 1997, the Company repaid the outstanding Renewable Term Loan
balance of $31 million thereby reducing its Long-Term Debt.  At September 30,
1997, the Company had $127.5 million available for borrowing under the
Renewable Term Loan.

     In April 1997, the City of Farmington, New Mexico issued $80.4 million
of Pollution Control Revenue Bonds for the benefit of the Company.  The
proceeds were used in June 1997 to redeem $47.9 million principal amount of
previously issued 6.25% bonds that would have matured in 2003 and $32.5
million principal amount of previously issued 6.10% bonds that would have
matured in 2007.  The new bonds, which are unsecured, bear interest at 6.95%
and mature in 2020.

     In April 1997, the Coconino County, Arizona Pollution Control
Corporation issued $36.7 million of Pollution Control Revenue Bonds for the
benefit of the Company.  The net proceeds loaned to the Company were used, in
part, to redeem, in June 1997, $16.7 million principal amount of previously
issued variable rate bonds that would have matured in 2031 and the remaining
portion is being used to fund $20 million of construction costs of additional
pollution abatement facilities at Navajo Generating Station.  The new bonds,
which are unsecured, bear interest at 7.125% and mature in 2032.

     In April 1997, the Coconino County, Arizona Pollution Control
Corporation issued $14.7 million of Pollution Control Revenue Bonds for the
benefit of the Company.  The net proceeds loaned to the Company were used in
June 1997 to redeem $14.7 million principal amount of previously issued
variable rate bonds that would have matured in 2031.  The new bonds, which
are unsecured, bear interest at 7.00% and mature in 2032.

     In October 1997, the Industrial Development Authority of the County of
Pima, Arizona issued $247.5 million of Industrial Development Revenue Bonds
for the benefit of the Company.  The net proceeds from the issuance will be
used in November 1997, to redeem $245 million principal amount of previously
issued variable rate bonds that would have matured between 2018 and 2025 and
to finance improvements to the Company's lower voltage electric transmission
and distribution system in Pima County, Arizona.  The new bonds, which are
unsecured, were sold in three series: Series A ($22.5 million) bears interest
at 6.10% and matures in 2025; Series B ($150 million) and Series C ($75
million) bear interest at 6.00% and mature in 2029.


NOTE 6.  INCOME TAXES
- ---------------------

     The expense (benefit) for income taxes included in the Comparative
Condensed Consolidated Statements of Income consists of the following:

                                               Three Months Ended
                                                   September 30,
                                                 1997       1996
                                              ---------- ----------
                                            - Thousands of Dollars -
Operating Expenses:
 Deferred Tax Expense
   Federal                                    $  15,143  $  13,785
   State                                          4,015      3,552
                                              ---------- ----------
    Total                                        19,158     17,337
 Investment Tax Credit Amortization                   -        (15)
                                              ---------- ----------
Total Expense Included in Operating Expenses     19,158     17,322
                                              ---------- ----------
Other Income (Deductions):
 Deferred Tax Expense
   Federal                                          339      3,760
   State                                            114        978
                                              ---------- ----------
    Total                                           453      4,738
 Reduction in Valuation Allowance               (13,120)   (70,283)
 Investment Tax Credit Amortization                (670)      (965)
                                              ---------- ----------
Total Benefit Included in
 Other Income (Deductions)                      (13,337)   (66,510)
                                              ---------- ----------
    Total Expense (Benefit) for Federal
     And State Income Taxes                   $   5,821  $ (49,188)
                                              ========== ==========









                                               Nine Months Ended
                                                   September 30,
                                                 1997       1996
                                              ---------- ----------
                                            - Thousands of Dollars -
Operating Expenses:
 Deferred Tax Expense
   Federal                                    $  16,671  $  10,320
   State                                          4,409      2,659
                                              ---------- ----------
    Total                                        21,080     12,979
 Investment Tax Credit Amortization                 (10)       (45)
                                              ---------- ----------
Total Expense Included in Operating Expenses     21,070     12,934
                                              ---------- ----------
Other Income (Deductions):
 Deferred Tax Expense
   Federal                                        4,538      3,377
   State                                          1,197        937
                                              ---------- ----------
    Total                                         5,735      4,314
 Reduction in Valuation Allowance               (42,413)   (81,296)
 Investment Tax Credit Amortization              (2,602)    (3,389)
                                              ---------- ----------
Total Benefit Included in
 Other Income (Deductions)                      (39,280)   (80,371)
                                              ---------- ----------
    Total Expense (Benefit) for Federal
     And State Income Taxes                   $ (18,210) $ (67,437)
                                              ========== ==========

     The differences between the income tax expense (benefit) and the amount
obtained by multiplying income before income taxes by the U.S. statutory
federal income tax rate are as follows:

                                               Three Months Ended
                                                   September 30,
                                                 1997       1996
                                              ---------- ----------
                                            - Thousands of Dollars -
Federal Income Tax Expense at
 Statutory Rate                               $  17,233  $  18,659
  State Income Tax Expense,
   Net of Federal Deduction                       2,656      2,868
  Investment Tax Credit Amortization               (670)      (980)
  Reduction in Valuation Allowance              (13,120)   (70,283)
  Other                                            (278)       548
                                              ---------- ----------
     Total Expense (Benefit) for Federal
      and State Income Taxes                  $   5,821  $ (49,188)
                                              ========== ==========









                                                Nine Months Ended
                                                   September 30,
                                                 1997       1996
                                              ---------- ----------
                                            - Thousands of Dollars -
Federal Income Tax Expense at
 Statutory Rate                               $  23,309  $  16,019
  State Income Tax Expense,
   Net of Federal Deduction                       3,591      2,462
  Investment Tax Credit Amortization             (2,612)    (3,434)
  Reduction in Valuation Allowance              (42,413)   (81,296)
  Use of Capital Loss Carryforwards                   -     (1,663)
  Other                                             (85)       475
                                              ---------- ----------
     Total Expense (Benefit) for Federal
      and State Income Taxes                  $ (18,210) $ (67,437)
                                              ========== ==========

     The reduction in the valuation allowance and corresponding NOL benefit are
primarily due to revisions in the estimated amount of NOLs that the Company
expects to utilize on future income tax returns.  At September 30, 1997, on a
cumulative basis the Company has recognized in its income statement the full
amount of the NOL benefit that the Company expects to utilize on future
income tax returns.  Additional amounts of NOL benefit which may be
recognized in the future in the Company's income statement are at present
indeterminate due to the interplay of open tax years for which tax
assessments may be made and varying expiration dates of federal and state NOL
carryforwards.


NOTE 7.  NEW ACCOUNTING STANDARD
- --------------------------------

     In February 1997, the Financial Accounting Standards Board issued
Statement of Financial Accounting Standards No. 128 (FAS 128), Earnings per
Share.  This Statement simplifies the standards for computing earnings per
share (EPS) and replaces the presentation of primary EPS with a presentation
of basic EPS.  It requires a dual presentation of basic and diluted EPS for
companies with complex capital structures on the face of the income
statement.  The Company is required to adopt FAS 128 in the fourth quarter of
1997.  The Company does not expect the adoption of FAS 128 to have a material
impact on the Company's calculation of EPS.


NOTE 8.  RECLASSIFICATIONS
- --------------------------

     Minor reclassifications have been made to the prior year financial
statements to conform to the current year's presentation.


ITEM 2. - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS
- -------------------------------------------------------------------------------

     The following contains information regarding the results of the Company's
operations during the third quarter and first nine months of 1997 compared with
the third quarter and first nine months of 1996, the outlook for dividends on
Common Stock, and changes in liquidity and capital resources of the Company
during the third quarter and first nine months of 1997.  Also management's
expectations of identifiable material trends are discussed.

OVERVIEW
- --------

     Earnings for the Company declined during the third quarter and first nine
months of 1997 relative to the same periods in 1996 primarily due to lower
recognition of NOL tax benefits in the third quarter of 1997.  Net income was
$43.4 million in the third quarter of 1997, compared with $102.5 million in the
third quarter of 1996.  Income tax benefits related to prior period net
operating losses totaled $13.1 million in the third quarter of 1997 compared
with $70.3 million in the third quarter of 1996. Other one-time items impacting
third quarter results include $3.3 million in pre-tax new business investment
expenses in the third quarter of 1997 and the following items recorded in the
third quarter of 1996: an $8.5 million pre-tax reversal of loss provision
related to the Company's former investment subsidiaries, a $3.4 million pre-tax
pension gain related to the Company's Voluntary Severance Plan, and a $9.2
million pre-tax charge related to a court ruling on contested sales tax 
expense. Excluding the recognition of these tax benefits and other one-time 
adjustments, the Company's ongoing net income increased by 7% to $32.3 million
in the third quarter of 1997 from $30.1 million in the same period of 1996.  
Factors contributing to this improvement were growth in the number of customers
in the Company's retail service area as well as increased kilowatt-hour sales 
to both retail and wholesale customers.

     Net income for the first nine months of 1997 was $84.8 million, compared
with $113.2 million during the comparable 1996 period.  Income tax benefits
related to prior period net operating losses for the nine month periods were
$42.4 million for 1997 and $81.3 million for 1996.  Other one-time items
impacting the nine month results, in addition to those listed above for the
third quarter, include a $14.0 million pre-tax VSP expense recorded in the
second quarter of 1996 (resulting in a nine month net pre-tax expense of  $10.6
million), a $10.2 million pre-tax reversal of loss provision recorded in the
second quarter of 1997 related to the Company's former investment subsidiaries,
$7.0 million in pre-tax new business investment expenses in 1997 and $2.8
million in pre-tax VSP expense related to post-retirement benefits other than
pensions recorded in the first quarter of 1997.   Excluding the recognition of
tax benefits and other one-time adjustments, the Company's ongoing net income
increased by 9% to $42.2 million for the first nine months of 1997 from $38.5
million in the same period in 1996.  See Results of Utility Operations below.

      Despite such improvements, the Company's financial prospects continue to
be subject to significant economic, regulatory and other uncertainties, some of
which are beyond the Company's control.  These uncertainties include the extent
to which the Company, due to continued high financial and operating leverage,
can alter operations and reduce costs in response to industry changes or
unanticipated economic downturns.  The Company's success will depend, in part,
on the Company's ability to contain the costs of serving retail customers and
the level of sales to such customers.  Although the Company anticipates
continued growth in sales over the next five years primarily as a result of
anticipated population and economic growth in the Tucson area, a number of
factors such as changes in the economic and regulatory environment and the
increasingly competitive electric markets could affect the Company's levels of
sales.

      The Company is developing strategies to address the uncertainties
discussed above as well as to position itself to benefit from the changing
regulatory environment.  Such strategies include the implementation of enhanced
cost measurement and management techniques, organizational realignment and
staffing reductions, and the development of new entities to provide energy
services to markets beyond the Company's retail service territory. Based on
cost containment measures implemented by the Company, a proposal to share
savings with the Company's retail customers was recently filed by the Company
with the ACC.  See Retail Rate Proposal below.  Additionally, the Company
successfully extended the power sale agreement with a key wholesale customer 
and has taken steps to reduce the cost of fuel supplied to the Company's 
largest generating facility.  See Results of Operations, Events Affecting 
Future Results of Utility Operations below.

      If the Company is unable to make sales at prices adequate to recover its
costs or if, for other reasons, the Company fails to maintain or improve its
cash flows, the Company's ability to meet its obligations may be jeopardized.
During the period 1999-2003, $192 million of the Company's long-term debt
obligations will mature.  Excluding letters of credit relating to bonds that
will be redeemed in November 1997, letters of credit supporting $529 million of
the Company's long-term variable rate debt obligations also have scheduled
expiration dates between December 31, 1999 and December 31, 2002.  See
Financing Developments below.  Should the credit ratings on the Company's
senior debt securities reach investment grade levels on certain dates or during
certain periods subsequent to January 1, 1998, the expiration dates for such
letters of credit would move forward to the period December 31, 1998 to 
December 31, 2000.  In the event that expiring letters of credit are not 
replaced or extended, the corresponding variable rate debt obligations would 
be subject to mandatory redemption.  While the Company intends to pay or 
refinance maturing bonds, and to replace or extend expiring letters of credit,
there can be no assurance that the Company will be able to pay such debt or 
replace or extend such letters of credit.  The Company's future cash flows will
also be affected by the level of interest rates due to the significant amount 
of variable rate debt outstanding.  See Liquidity and Capital Resources below.

The Company's capital structure is highly leveraged.  Although the Company has
been successful in 1997 in refinancing certain of its tax-exempt variable rate
debt on an unsecured fixed rate basis, the Company's ability to raise capital
(through either public or private financings) is limited. The Company's ability
to obtain debt financing is limited due to the restrictive covenants contained
in existing obligations to creditors.  To the extent the Company refinances its
debt obligations in order to repay them when due, such refinancing may be made
on terms which may be adverse to the Company.  Such terms could include, among
other things, higher interest rates and various restrictive covenants, such as
dividend payment restrictions.  Access to equity capital may be limited because
of the Company's present inability to pay dividends.  See Dividends on Common
Stock below.

      As described in Liquidity and Capital Resources, Financing Developments
below, the Company filed an application with the ACC for authority to implement
various financings intended to address the financial uncertainties outlined 
above.  This strategy includes the proposed refinancing of certain variable 
rate tax-exempt obligations on a fixed-rate basis, the proposed replacement 
of the credit facilities provided under the MRA with one or more new credit 
facilities, the proposed refinancing of certain first mortgage bonds, and the 
proposed implementation of a direct stock purchase plan.  The ACC approved a 
portion of this financing application on August 26, 1997, which allowed the 
Company to proceed with the refinancing of certain tax-exempt variable rate 
debt obligations on October 1, 1997.  The ACC is expected to rule on the 
remaining portions of the financing application in the fourth quarter of 1997.

      During the next twelve months, the Company expects to be able to fund
operating activities and construction expenditures with internal cash flows,
existing cash balances, and, if necessary, drawdowns under the Renewable Term
Loan and/or borrowings under the Revolving Credit.  As discussed in
Liquidity and Capital Resources below, there are a variety of factors that
could cause actual cash flows to differ materially from projected cash flows.
As of November 5, 1997, the Company's cash balance including cash equivalents
was approximately $137 million. Cash balances are invested in investment grade,
money-market securities with an emphasis on preserving the principal amount
invested.


COMPETITION
- -----------

    WHOLESALE

     The Company competes with other utilities, marketers and independent power
producers in the sale of electric capacity and energy in the wholesale market.
The Company's prices for wholesale sales of capacity and energy, generally, are
not permitted to exceed rates determined on a cost of service basis.  In the
current market, wholesale prices are substantially below costs determined on a
fully allocated cost of service basis, but, in all instances, wholesale sales
have been made at prices which exceed the level necessary to recover fuel and
other variable costs.  It is expected that competition to sell capacity will
remain vigorous, and that prices may remain at or near current levels for at
least the next several years, due to increased competition and surplus capacity
in the southwestern United States.  Competition for the sale of capacity and
energy is influenced by many factors, including the availability of capacity in
the southwestern United States, the availability and prices of natural gas and
oil, spot energy prices and transmission access.  In addition, the Energy Policy
Act of 1992 has promoted increased competition in the wholesale electric power
markets by encouraging the participation of utility affiliates, independent
power producers and other non-utility participants in the development of power
generation.

      The FERC issued two orders pertaining to transmission access in April
1996.  FERC Order No. 888, among other things, requires all public utilities
that own, control, or operate interstate transmission facilities to offer
transmission service to others under a single tariff that incorporates certain
minimum terms and conditions of transmission service established by the FERC.
This tariff must also be used by public utilities for their own wholesale 
market transactions. Transmission and generation services for new wholesale 
service are to be unbundled and priced separately. A Phase I open access tariff
containing the terms and conditions outlined in the Order was filed by the
Company on July 9, 1996.  The Company subsequently filed a Stipulation in Offer
of Settlement regarding the proposed tariff.  On July 17, 1997, the FERC
approved the settlement.  That settlement approved the Company's rates for
service,made amendments to certain wholesale contracts and required the Company
to make a Section 205 filing for its 69kV-138kV transmission system, the rates
for which were agreed upon in the settlement.  The Company made its Section 205
filing for its 69kV-138kV on August 15, 1997.  FERC accepted that filing on
October 10, 1997, thereby incorporating the rates for 69kV-138kV transmission
service into the Company's Open Access Tariff.

     FERC Order No. 889 requires transmission service providers to establish or
participate in an open access same-time information system (OASIS) that provides
information on the availability of transmission capacity to wholesale market
participants. The order also establishes standards of conduct that are designed
to prevent employees of a public utility engaged in marketing functions from
obtaining preferential access to OASIS-related information or from engaging in
unduly discriminatory business practices.  The Company is in compliance with
these requirements.

     On March 4, 1997, the FERC issued Orders 888-A and 889-A which require the
Company to make an additional compliance filing of its tariff and to comply 
with certain additional OASIS requirements. The Company has made its compliance
tariff filing and is in the process of complying with the additional OASIS
requirements.

      The Company and several other electric utilities located in the
southwestern United States have recently begun to investigate the feasibility 
of forming an independent system operator for the region.  It is presently
contemplated that such an organization, if formed, would be responsible for
ensuring transmission reliability and nondiscriminatory access to the regional
transmission grid.  All of the major transmission owners in the Southwest, as
well as a number of users of the transmission system, are involved in the
feasibility study.  Three sets of public meetings were held in order to obtain
public input to the study.  The initial feasibility study was completed in
September 1997 and the participants are reviewing the results prior to deciding
whether to proceed with the detailed developmental work.  The formation of an
independent system operator would be subject to approval by the FERC and state
regulatory authorities in the region.  The financial aspects of forming an
independent system operator, including the potential effects on the Company's
future results of operations, will be examined as part of the development work.

     Given the level of competition already present in the wholesale market for
electricity, the Company does not believe that FERC Order No. 888 or Order No.
889 will have a material effect on the Company's future results of operations.
However, such orders could assume greater significance if the Company's retail
service territory were to be opened to competing suppliers of electricity.


    RETAIL

     Under current law, the Company is not in direct competition with any other
regulated electric utility for electric service in the Company's retail service
territory.  However, the Company does compete against gas service suppliers and
others who may provide energy services which would be substitutes for,or permit
bypass of, the Company's services.  In addition, in December 1996, the ACC
adopted rules that, if implemented, require a phase-in of retail electric
competition in Arizona over a four year period beginning January 1, 1999.

      Currently, electric energy for meeting retail customers' needs primarily
competes with natural gas, an alternative fuel source for certain retail energy
uses.  Such uses may include heating, cooling and a limited number of other
energy applications.  In most applications, electric energy is a cost effective
source of energy compared with natural gas.  Also, customers, particularly
industrial and large commercial customers, may own and operate facilities to
generate their own electric energy requirements.  If such facilities meet
certain technical and operational standards, they may be eligible for treatment
under federal law as "qualifying facilities", which in turn would permit the
owner to require the local electric utility to purchase the output of such
facilities at the latter's "avoided cost" pursuant to the Public Utility
Regulatory Policies Act of 1978, as amended. Such facilities may be operated by
the customers themselves or by other entities engaged for such purpose.  The
company presently does not have any material contracts which require it to
purchase the output of qualifying facilities.

     The Company actively markets energy and customized energy-related services
to meet customer needs. The Company has to date lost no customers to self-
generation in part because of such efforts.  For example, the Company's two
principal mining customers, which provide approximately 8% of the Company's
total annual revenues from retail customers, each have considered self-
generation. However, new contracts and/or amendments were executed with both of
such mining customers that included, among other things, price reductions and
term extensions.  In 1996, the Company negotiated contract amendments with its
largest mining customer.  The contract amendments include, among other things,
price reductions and a change in service from a firm basis to an interruptible
basis, which includes a market pricing mechanism covering a portion of the
customer's electrical load.  Such contract is scheduled to expire in January
2003.  The contract with the Company's other principal mining customer is
scheduled to expire in March 2001. In June 1997, the Company entered into a new
electric service agreement with this customer to furnish additional load to a
new copper solvent extraction plant.  Also, in September 1997, the ACC approved
an amendment to this customer's electric service agreement which allows for a
reduction in price, an increase in load, the provision of interruptible service
and a change in payment procedures.  The conditions of this amendment will
expire with the contract.  Early terminations of the contracts by mining
customers require at least one and up to two years prior notice.  No such
notices have been received.  The ability to enter into or extend contracts, to
avoid early termination, and to retain customers will be dependent on, among
other things, the Company's ability to contain its costs, market conditions and
alternatives available to customers.  Changes in service requirements (from a
firm basis to an interruptible basis) may also permit the Company to delay
additions to peaking capacity.

      In December 1996, the ACC voted to adopt rules on retail electric
competition.  The rules, if implemented, require each "Affected Utility"
(defined below) to open its retail service area to competing electric service
providers on a phased-in basis over the period 1999 to 2003. Beginning no later
than January 1, 1999, retail customers representing at least 20% of each
Affected Utility's 1995 peak demand will be eligible to choose their electric
service provider from companies certificated by the ACC. Such service providers
would include Affected Utilities as well as other entities (including power
marketers and out-of-state utilities) that apply for and receive a certificate
of convenience and necessity from the ACC.  Beginning no later than January 1,
2001,retail customers representing at least 50% of each Affected Utility's 1995
peak demand will be eligible to choose their service provider.  All remaining
retail customers would then be eligible to choose from certificated service
providers by January 1, 2003.  Under the rules, Affected Utilities will be
required to provide distribution wheeling services (i.e., retail wheeling) at
rates approved by the ACC in order to facilitate sales by competing energy
providers.  Such wheeling services would involve the transmission of energy
produced by other entities over the Company's transmission and distribution
system to consumers located in the Company's present retail service area.
While retail wheeling will expose the Company's service area to increased
competition, it will also open additional retail markets into which the Company
may sell its electric power.

     The Affected Utilities whose service territories will be open to competing
service providers under the rules include the Company, Arizona Public Service
Company, Citizens Utilities Company, and several electric cooperatives.
However, electric cooperatives will be permitted to request a modification to
the phase-in schedule in order to preserve their tax exempt status or to modify
power supply arrangements and related loan agreements.  Each of the Affected
Utilities will be eligible to offer electric service to customers of other
certificated entities within Arizona.   Participation in competitive retail
markets by other electric utilities which are not regulated by the ACC, such as
the Salt River Project and certain municipal utilities, will be permitted under
the rules on a similar reciprocal basis (i.e., these utilities would have to
allow their service territories to be similarly open to competing service
providers).

      The rules require new market entrants to obtain a certificate of
convenience and necessity from the ACC prior to offering retail electric
service. New market entrants will be required to demonstrate adequate technical
and financial capabilities to the ACC prior to certification.  In addition, by
January 1, 1999, all competitive market participants, including Affected
Utilities, will be required to obtain at least one-half of one percent of the
energy sold competitively in the Arizona retail market from new solar 
generating resources.  This required percentage will increase to one percent on
January 1, 2002.  New solar resources are defined under the rules as 
photovoltaic or solar thermal resources that are installed on or after January 
1, 1997.  Electric service providers not in compliance with these solar 
resource standards will be subject to a penalty of up to 30 cents per kWh to 
be applied to the kWh deficiency in solar energy provided.

      The rules specify that the ACC will allow the recovery of unmitigated
stranded costs by Affected Utilities.  Stranded cost is defined in the rules as
the net difference between the value of prudent jurisdictional assets and
obligations under traditional regulation and the market value of those assets
and obligations in a competitive retail market.  In order to recover stranded
costs,utilities would have to demonstrate to the ACC that they have taken every
feasible, cost effective measure to mitigate or offset stranded costs, and
utilities would have to file estimates of unmitigated stranded costs with the
ACC which are fully supported by analyses and records of market transactions
undertaken by willing buyers and sellers. Furthermore, Affected Utilities would
have to seek ACC approval of distribution charges or other means of recovering
unmitigated stranded costs from customers who reduce or terminate service as a
direct result of retail competition.  The rules specify that other issues
related to the analysis and recovery of stranded costs would be examined by a
working group following adoption of the rules.  Until such time as the ACC
adopts specific guidelines for quantifying unmitigated stranded costs,including
the methods used to identify and value jurisdictional assets and obligations,
the Company believes that any estimate of unmitigated stranded costs would be
highly speculative.

      Each Affected Utility will be required to file unbundled service tariffs
with the ACC by December 31, 1997, for the following services: distribution
wheeling service, metering and meter reading services, billing and collection
services, open access transmission service (as approved by the FERC, if
applicable), ancillary services (as defined by FERC Order No. 888), information
services such as the provision of customer information to other service
providers, and other ancillary services necessary for safe and reliable system
operation.  Until such time as the ACC determines that retail competition has
been substantially implemented, each Affected Utility will also have to provide
standard offer bundled service equivalent to the services currently being
provided at regulated rates to all consumers located in their current retail
service areas.

      Pursuant to the rules, working groups have been formed to analyze various
issues related to retail competition.   Each working group consists of members
representing a wide variety of interests including the ACC Staff, consumers,
Affected Utilities, and potential new service providers.  Separate working
groups have been established to investigate issues related to the 
quantification and recovery of stranded costs, the unbundling of utility 
services and rates,the maintenance of system reliability and safety, the 
methods to be used in determining consumer participation during the early phase
- -in periods, and certain legal issues related to the rules.  Reports by the 
working groups for stranded costs and unbundling of utility services and rates 
have been delivered to the ACC and are in the process of being reviewed.  
Reports by the other working groups are expected in the fourth quarter of 1997.
The Company is actively participating in each of the working groups 
investigating retail competition issues.

      On January 10, 1997, the Company filed with the ACC a motion for
reconsideration and request for stay of the rules. Concerns expressed by the
Company in its motion included the potential impact on system reliability,
mechanisms for stranded cost quantification and recovery,the ability to compete
fairly with public power entities and recipients of federal preference power,
and certain legal deficiencies which would likely result in legal appeals and
litigation.  On January 30, 1997, the Company's motion for reconsideration was
deemed denied by the ACC by operation of law.  On February 28,1997, the Company
filed an appeal of the ACC order in both the Arizona Superior Court and the
Arizona Court of Appeals.  On June 19, 1997, the Arizona Court of Appeals
dismissed the appeal at the request of the Company.  At the same time, the
Company filed a motion for Summary Judgment in the Arizona Superior Court. This
motion was argued and the results are pending before the judge.  At the present
time, the Company is unable to predict the outcome of the Superior Court appeal
or the effects such rules, in their present form, would have on the Company's
future results of operations.

      The Arizona Legislature is also investigating the potential merits of
retail electric competition.  Legislation was passed in 1996 requiring the
establishment of a joint legislative study committee on electric industry
competition. This committee is charged with studying and making recommendations
on a wide variety of issues related to electric industry competition.   The
committee is to complete a report to the legislature no later than December 31,
1997. Such report is to contain a proposal for electric utility competition for
implementation by December 31, 1999. An advisory committee on electric industry
competition was also created, consisting of members representing electric
consumers, electric utilities, various State offices and agencies, and other
interested parties. The Company has a representative on such advisory committee
who is actively participating as a committee member. Three subcommittees of the
advisory committee were formed for purposes of evaluating the timing of retail
competition, reviewing tax issues related to retail competition and identifying
specific legislative actions necessary to implement retail competition.  The
reports have been issued and the Legislature is now considering the
recommendations.

      The Company cannot predict whether or not there will be competing or
conflicting initiatives on industry restructuring from both the ACC and the
Arizona Legislature.  However, the Company believes that certain matters
contained in the ACC's rules on retail competition may require legislative
changes, while other matters may require constitutional amendments.
Additionally, several federal initiatives regarding retail electric competition
have been introduced in Congress which, if passed, could modify, augment or
preempt the actions taken by the ACC or the Arizona Legislature.  The Company
will continue to assess the likely impact of the ACC's rules on retail
competition, proposed legislation on retail competition, and other potential
market reforms on the Company.  At the present time the Company is unable to
predict the ultimate impact of increased retail competition on the Company's
future results of operations. See Accounting for the Effects of Regulation
below for a discussion of the potential impact of increased competition on the
Company's accounting policies.

HOLDING COMPANY PROPOSAL
- ------------------------

      On April 4, 1997, the Company filed with the ACC a notice of
intent to organize a public utility holding company.  If approved, the
Company intends to establish, through a one-for-one share exchange, a
new corporate structure in which the Company will be a subsidiary of a
new holding company named UniSource Energy Corporation.  The Company
is seeking to establish a holding company structure because the
Company believes that it is in the best interests of its Shareholders
for the Company to participate in various segments of the evolving and
expanding electric energy business.  The Company believes that such
participation would be facilitated and enhanced by the holding company
structure, a structure commonly used in the electric industry and
other industries to conduct different lines of business.  In May 1995,
Shareholders approved the formation of a holding company and the
related one-for-one share exchange.  If regulatory approvals are
received, it is likely that no further Shareholder approval would be
required to effect the share exchange.  On September 25, 1997, the
FERC approved the Company's application to form a holding company.  On
October 2 and 3, 1997, the ACC held hearings on the Company's holding
company application.  The Company expects a decision from the ACC
sometime in the fourth quarter of 1997.

      If the holding company structure is established, substantially
all of the assets of the holding company initially following the share
exchange would consist of the Company's Common Stock.  The holding
company would rely primarily on funding sources other than TEP to fund
its operations and to capitalize affiliate companies because the
Company is currently prohibited from paying dividends (see
Dividends on Common Stock below) and because the Company may be
prohibited from making investments in the holding company or
affiliated companies.  Also, the ACC's affiliated interest rules would
limit certain transactions between the holding company and the Company
unless approved by the ACC.  Accordingly, funds for the holding
company would be limited until the holding company obtains outside
financing or until the affiliate companies are able to pay cash
dividends to the holding company.  The Company is reviewing various
methods for the holding company to obtain outside financing, including
the issuance of new equity by the holding company.

      In the unlikely event the holding company incurs liabilities in
excess of cash flow available from the Company, the affiliate
companies or outside financings, the holding company might not have
sufficient cash available to meet such liabilities.  Under such
circumstances the Company may be required to seek waivers of the
provisions of certain of its credit agreements and leases and the
affiliated interest rules in order to permit the Company to provide
interim financing to the holding company.  There can be no assurance
that a holding company structure will be implemented in the future,
that the holding company will be able to obtain outside financing, or
that the Company would be able to obtain necessary waivers if so
required.


RETAIL RATE PROPOSAL
- --------------------

      On July 9, 1997, the Company filed with the ACC a request for an
annual rate reduction of $6.8 million (or 1.1%) for retail customers.
Previously, pursuant to the March 1996 Rate Order by the ACC, the
Company implemented a 1.1% retail rate increase, and agreed to a rate
moratorium period whereby the Company committed not to file for a
change in base rates prior to January 1, 2000, except under certain
circumstances which include the sharing with customers of benefits of
cost containment efforts.

     The July 1997 filing is in the form of a Shared Savings Proposal
(SSP) which promotes a sharing of benefits with customers of cost
containment efforts and the mitigation of potential stranded costs
associated with the introduction of retail electric competition in
Arizona.  In the SSP, the Company identified approximately $23 million
in annual pre-tax cost containment measures of which $20.8 million is
allocable to ACC jurisdictional operation.  These savings were
realized primarily from renegotiated fuel contracts and the Company's
Voluntary Severance Program, which reduced the Company's workforce by
approximately 15%.  No date has been set for formal consideration of
the matter by the ACC.

     The proposed $6.8 million rate reduction represents a 50/50
sharing with customers of $13.6 million of cost containment efforts.
The Company proposed that additional savings be used by the Company to
mitigate potential stranded costs through accelerated amortization of
retail excess capacity deferrals.  Retail excess capacity deferrals
represent those operating and capital costs associated with
Springerville Unit 2 capacity, which were deemed by the ACC to not be
recoverable in retail rates prior to the 1994 and 1996 Rate Orders.
Such retail excess capacity deferrals totaled $89.9 million and $93.6
million at September 30, 1997 and December 31, 1996, respectively.
The proposed $7.2 million increase in annual amortization expense for
such retail excess capacity deferrals would decrease the amortization
period from 20 years to 7.76 years.  The proposed increase in
amortization expense would be reflected in the Company's regulatory
accounting records but would have no impact on the expenses included
in the Company's financial accounting statements.  See
Note 2 of Notes to Condensed Consolidated Financial Statements,Rate
Matters.

ACCOUNTING FOR THE EFFECTS OF REGULATION
- ----------------------------------------

      The Company prepares its financial statements in accordance with
the provisions of FAS 71.  This statement requires a cost-based rate-
regulated utility to reflect the effect of regulatory decisions in its
financial statements.  In certain circumstances, FAS 71 requires that
certain costs and/or obligations be reflected in a deferral account in
the balance sheet and not be reflected in the statement of income or
loss until matching revenues are recognized.  Therefore, the Company's
Consolidated Balance Sheets at September 30, 1997, and at December 31,
1996, contain certain line items (for example, Deferred Debits -
Regulatory Assets, Accumulated Deferred Investment Tax Credits
Regulatory Liability, MSR Option Gain Regulatory Liability, and Other
Regulatory Liabilities) solely as a result of the application of FAS
71.  In addition, a number of line items in the Company's Consolidated
Statements of Income for the quarters ended September 30, 1997 and
1996, and the nine months ended September 30, 1997 and 1996, also
reflect the application of FAS 71.

      As noted in Competition, Retail above, on December 23, 1996,
the ACC voted to adopt rules on retail electric competition.  However,
the ACC has not yet adopted specific guidelines for quantifying
unmitigated stranded costs, including the methods used to identify and
value jurisdictional assets and obligations.  The Company, in reliance
on previous rate orders, believes that it will recover the full costs
of its investments in utility plant assets and regulatory assets.  If
less than full recovery is provided, write-offs of assets may occur
and the Company may be unable to continue to apply FAS 71.

     Further, in response to the legislation adopted by the State of
California in 1996 establishing competitive markets for electricity in
that state, the SEC questioned the continued applicability of FAS 71
by the generation operations of California investor-owned utilities
even though the recovery of stranded costs is provided through a
statutory funding mechanism.  In May and July 1997 the Financial
Accounting Standards Board Emerging Issues Task Force (EITF)
considered this issue, as similar legislation has been passed or
initiated in states other than California.  Based on the conclusions
of the EITF, at some point in the future, the Company may be unable to
continue to apply FAS 71 to the generation portion of the business,
even if it believes it will recover the full amount of its costs under
the ACC competition phase-in plan.  The Company is unable to predict
the outcome of these matters.

      If, at some point in the future, the Company determines that all
or a portion of the Company's regulated operations no longer meet the
criteria for continued application of FAS 71, the Company would be
required to adopt the provisions of FAS 101 for that portion of the
operations for which FAS 71 no longer applied.  Adoption of FAS 101
would require the Company to write off its regulatory assets and
liabilities as of the date of adoption of FAS 101 and would preclude
the future deferral in the balance sheet of costs not recovered
through rates at the time such costs were incurred, even if such costs
were expected to be recovered in the future.  Based on the balances of
the Company's regulatory assets and liabilities as of September 30,
1997, the Company estimates that if FAS 101 were adopted and applied
to all segments of the Company's operations, an extraordinary loss of
$183 million, which includes a reduction for the related deferred
income taxes of $101 million, would be required.  The Company's cash
flows would not be affected by the adoption of FAS 101.

      At the present time, the Company recovers the costs of its plant
assets through its regulated revenues.  If in the future the Company
discontinues accounting according to the provisions of FAS 71, the
Company would also need to consider whether the markets in which the
Company is then selling power will allow the Company to recover the
costs of its plant assets.  At that time, if market prices and other
recoveries are not expected to allow the Company to recover the costs
of its plant assets, additional write-downs may be required in
accordance with the provisions of FAS 121.


INVESTMENTS IN ENERGY-RELATED VENTURES
- --------------------------------------

     As described in Note 4 of Notes to Condensed Consolidated Financial 
Statements,Consolidated Subsidiaries, a wholly owned subsidiary of the 
Company, Millenium Energy Holdings, Inc., exercised an option to acquire a 
50% ownership interest in New Energy Ventures, LLC (NEV) effective
September 1, 1997.  NEV is a buyer's agent providing load aggregation
and advisory services to customers in California and the Northeastern
region of the United States.  Prior to exercising its option to
acquire NEV, the Company provided funding to NEV pursuant to a
consulting services contract since its formation in 1995.  NEV seeks
contracts to operate on either (i) a fixed commodity basis or a
limited shared savings basis, such that NEV will be paid a percentage
of the electricity cost saving that accrue to their clients, or (ii)
as a fee based advisor on energy services, cogeneration, independent
power or third party provider options.

      In addition to the Company's investment in NEV, the Company
continues to evaluate and pursue other energy related investment
opportunities.  Nations Energy Corporation (Nations), a wholly-owned
subsidiary established for the purpose of investing in independent
power projects, continues to pursue projects in both the domestic and
foreign markets.  Advanced Energy Technologies, Inc. (AET), a wholly
owned subsidiary of the Company, holds a 50% ownership interest in
Global Solar Energy, LLC (Global Solar), an energy-related company
which developed a proprietary process for manufacturing flexible,
thin-film, photo-voltaic cells. Global Solar has recently established
a manufacturing facility in Tucson, AZ and currently plans to begin
commercial production in 1998.  In July 1997, SWPP Investment Company
(SWPP), a wholly-owned subsidiary, entered into a joint venture with
three Mexican investment partners to form Sentinel Concrete Utility
Poles, a domestic distributor of concrete power poles and related
products.  SWPP holds a 50% ownership interest in this joint venture.
SWPP International, Ltd. (SWPPI), a wholly owned subsidiary of SWPP,
holds a 50% ownership interest in a manufacturer and international
distributor of concrete power poles and related products.  Southwest
Energy Solutions, Inc. (SES), a wholly owned subsidiary formed in
January 1997, provides ancillary energy products and services to
retail customers.

      In comparison to the Company's investment in regulated utility
assets, the Company's current investments in Nations, AET, SWPP, SES,
and NEV are not material in terms of recorded assets or net income.
As of September 30, 1997, the Company's Condensed Consolidated Balance
Sheet reflects an investment in energy-related ventures of
approximately $26 million (included in Investments and Other
Property). 


DIVIDENDS ON COMMON STOCK
- -------------------------

      The Company is precluded by restrictive covenants in certain
debt agreements from declaring or paying dividends.  No dividend on
common stock has been declared or paid since 1989.

      Under the applicable provisions of amendments to the Arizona
General Corporation Law, a company is permitted to make distributions
to shareholders unless, after giving effect to such distribution,
either (i) the company would not be able to pay its debts as they come
due in the usual course of business, or (ii) the company's total
assets would be less than the sum of its total liabilities plus the
amount necessary to satisfy any liquidation preferences of
shareholders with preferential rights.  The Company is not currently
prevented from declaring and paying a dividend under such provisions.

      The Company's ability to pay a dividend is restricted by certain
covenants of the General First Mortgage.  So long as certain series of
First Mortgage Bonds (aggregating $184 million in principal amount)
are outstanding, these covenants restrict the payment of dividends on
Common Stock if certain cash flow coverage and retained earnings tests
are not met.  The cash flow coverage test would prevent the Company
from paying dividends on its Common Stock until such time as the
Company's cash flow coverage ratio, as defined therein, is greater or
equal to a ratio of 2 to 1, and the retained earnings test would
permit dividend payments if the Company has positive retained earnings
rather than an accumulated deficit.  As of September 30, 1997, the
Company had a cash flow coverage ratio in excess of 2 to 1 and the
Company's accumulated deficit was $421 million.  Such covenants will
remain in effect until the First Mortgage Bonds of such series have
been paid or redeemed.  The latest maturity of such First Mortgage
Bonds is in 2003.

      The MRA contains a dividend restriction based on the amount of
retained earnings.  Such restriction will no longer apply if (i) the
Renewable Term Loan and the Revolving Credit have been paid in full
and the commitments relating thereto have been terminated and (ii) the
Company's senior long-term debt is rated investment grade.  At
November 5, 1997, there was no outstanding balance due under the
Renewable Term Loan, and to date no amounts have been borrowed under
the Revolving Credit.  Commitments relating to such facilities permit
the Company to borrow $127.5 million under the Renewable Term Loan and
$50 million under the Revolving Credit.  The Company's senior long-
term debt is currently rated below investment grade.

      In order for the Company to pay a dividend when such covenants
would otherwise restrict such payment, the Company would have to (i)
obtain a waiver or an amendment to the MRA's retained earnings
covenant, or replace the MRA with one or more new bank credit
facilities, and (ii) redeem all outstanding First Mortgage Bonds of
the series that contain dividend restrictions or amend the General
First Mortgage.  Such General First Mortgage amendment would require
approval by holders of 75% of all First Mortgage Bonds.

      In addition to such restrictive covenants, the Federal Power Act
states that dividends shall not be paid out of funds properly included
in the capital account.  It is unclear whether such provisions of the
Federal Power Act restrict the Company from paying dividends.


EARNINGS
- --------

     The Company recorded net income of $43.4 million in the third
quarter of 1997 compared with net income of $102.5 million in the
third quarter of 1996.  The net income per average share of Common
Stock was $1.35 for the third quarter of 1997 compared with net income
per average share of Common Stock of $3.19 for the third quarter of
1996.  Excluding the impact of the recognition of tax benefits and
other one-time adjustments, 1997 third quarter ongoing net income was
$32.3 million or $1.01 per share compared with ongoing net income of
$30.1 million or $0.94 per share for the third quarter of 1996.

     For the first nine months of 1997, the Company recorded net
income of $84.8 million, compared with net income of $113.2 million
for the first nine months of 1996.  The net income per average share
of Common Stock was $2.64 for the first nine months of 1997, compared
with a net income per average share of Common Stock of $3.52 for the
first nine months of 1996.  Excluding the impact of the recognition of
tax benefits and other one-time adjustments, ongoing net income for
the first nine months of 1997 was $42.2 million or $1.31 per share
compared with $38.5 million or $1.20 million per share for the first
nine months of 1996.


RESULTS OF OPERATIONS
- ---------------------

 RESULTS OF UTILITY OPERATIONS

   SALES AND REVENUES

     Comparisons of kilowatt-hour sales and electric revenues are
shown below:


                                                       
Three Months Ended                                          Increase/(Decrease)
 September 30                         1997        1996       Amount    Percent
- -------------------------          ---------   ---------    --------   -------

Electric kWh Sales (000):
      Retail Customers             2,321,385   2,240,499      80,886     3.6%
         Sales for Resale            921,220     836,721      84,499    10.1
                                   ---------   ---------     -------    
            Total                  3,242,605   3,077,220     165,385     5.4

      Electric Revenues (000):
         Retail Customers           $201,566    $195,261    $  6,305     3.2%
         Amortization of MSR 
          Option Gain 
          Regulatory Liability             0       5,014      (5,014) (100.0)
         Sales for Resale             29,523      22,803       6,720)   29.5
                                   ---------   ---------    --------- 
            Total                   $231,089    $223,078   $   8,011     3.6
                                   =========   =========    ========= 

                                                         
Nine Months Ended                                           Increase/(Decrease)
September 30                          1997        1996       Amount    Percent
- --------------------------         ---------   ---------    --------   -------
      Electric kWh Sales (000):
         Retail Customers          5,830,042   5,718,042    112,000      2.0%
         Sales for Resale          2,385,481   2,231,072    154,409      6.9
                                  ----------   ---------   ---------
            Total                  8,215,523   7,949,114    266,409      3.4

      Electric Revenues (000):
         Retail Customers           $490,752    $482,511  $   8,241      1.7%
         Amortization of MSR 
          Option Gain 
          Regulatory Liability         8,105      15,040     (6,935)   (46.1)
         Sales for Resale             69,483      58,088     11,395     19.6
                                  ----------    --------    ---------  
            Total                   $568,340    $555,639   $ 12,701      2.3
                                  ==========    ========    =========   

     KWh sales to retail customers increased by 3.6% in the third
quarter of 1997 compared with the third quarter of 1996 due to warmer
weather conditions and a 2.1% increase in the average number of retail
customers.  KWh sales to retail customers increased by 2.0% in the
first nine months of 1997 compared with the same period in 1996, due
primarily to a 2.4% increase in average number of retail customers for
the nine month period.  Based on cooling degree days, a commonly used
measure in the electric industry that is calculated by subtracting 75
from the average of the high and low daily temperatures, the Tucson
area registered an increase of approximately 18% in such cooling
degree days for the third quarter of 1997 compared with the same
period in 1996, and an increase of approximately 7% in such cooling
degree days compared with the ten year average for the same period
from 1987 to 1996.  Cooling degree days for the third quarter of 1997
were 1016, compared to 862 for the third quarter of 1996 and 953 for
the ten year average.

     Revenues from sales to retail customers increased by 3.2% in the
third quarter of 1997 compared with the third quarter of 1996 due to
the higher kWh sales discussed above.  The increase in retail revenues
for the quarter was slightly less than the increase in retail kWh
sales due to a 6% decrease in revenues per kWh sold to mining
customers.  The change in average price of sales to mining customers
reflects the impact of the renegotiation of the contract with the
Company's largest mining customer in 1996.  Revenues from sales to
retail customers in the first nine months of 1997 increased by 1.7%
compared with the same period in 1996.  The increase in kWh sales for
the first nine months of the year offset the average price decrease to
mining customers discussed above.

     KWh sales for resale increased by 10.1% in the third quarter and
by 6.9% in the first nine months of 1997 relative to the same periods
in 1996.  Higher economy energy sales accounted for the third quarter
increase.  Revenues from sales for resale were 29.5% higher in the
third quarter and 19.6% higher in the first nine months of 1997
compared to the same periods in 1996 due to higher market prices for
wholesale economy energy in all quarters of 1997.  Factors
contributing to higher market prices in the third quarter include
higher natural gas prices, increased demand due to warmer temperatures
in the southwestern United States, and WSCC imposed restrictions on
the Pacific Intertie, limiting energy availability from the Northwest.
Higher natural gas prices and a reduction in regional generating
capacity due to planned and force outages of generating facilities in
the southwestern United States contributed to the higher market prices
in the first half of 1997.

     Revenue from the Amortization of the MSR Option Gain Regulatory
Liability was $5.0 million lower in the third quarter and $6.9 million
lower in the first nine months of 1997 compared with the same periods
in 1996.  This Regulatory Liability was fully amortized as of May
1997.


    OPERATING EXPENSES

     Fuel and Purchased Power expense increased by 10% in the third
quarter and 4.6% in the first nine months of 1997 compared with the
same period in 1996.  The increases in fuel and purchased power
expense outpaced the growth in total kWh sales for both periods, with
increased usage of gas-fired generation in the third quarter and
increased purchases of higher cost economy energy in the second and
third quarters of 1997 due to unscheduled outages at remote plants and
to meet retail and wholesale energy requirements.  The increase in
purchased power expense was partially offset by the absence of take-
or-pay payments for fuel in the first nine months of 1997, compared to
take-or-pay payments of $3.0 million for the same period in 1996.

     Other Operations expense increased by $4.9 million in the third
quarter and $10.8 million in the first nine months of 1997 relative to
the same periods in 1996.  These increases include higher expenses
related to funding of new energy-related businesses, as well as a
first quarter 1997 VSP-related adjustment to post-retirement benefits
expense.

     Maintenance and Repairs expense increased by $0.3 million in the
third quarter and $3.6 million in the first nine months of 1997
compared to the same periods in 1996 due primarily to scheduled
maintenance work at the Springerville station in the first and second
quarters of 1997.

     Depreciation and Amortization expense decreased by $3.1 million
in the third quarter and $8.5 million in the first nine months of 1997
compared with the same periods in 1996.  These decreases were
attributable to the completion in January 1997 of a three year
amortization for Springerville Unit 2 Rate Synchronization Costs
established in the 1994 Rate Order, as well as an extension of the
depreciable life for pollution control facilities as required by the
Company's 1996 Rate Order.

     Taxes Other Than Income Taxes decreased by $9.1 million in the
third quarter and $13.1 million in the first nine months of 1997
compared with the same periods in 1996.  This was primarily due to a
charge of $7.3 million in the third quarter of 1996 related to a court
ruling on contested sales tax assessments.  See Note 1 of Notes to 
Condensed Consolidated Financial Statements, Tax Assessments. 
Property tax rates and property valuations for tax purposes were also 
lower in 1997.

     Voluntary Severance Plan Expense (Gain) for the third quarter of
1996 reflected a net gain of $3.4 million.  This net gain was
comprised of a $3.7 million benefit reflecting curtailments and
settlements of pension liabilities related to the VSP, as well as
additional charges of $0.3 million related to the VSP.  During the
first nine months of 1996, a net expense of $10.6 million was recorded
to reflect the Company's implementation of the VSP.

    Income Tax expense included in Operating Expenses increased by
$1.8 million in the third quarter and by $8.1 million in the first
nine months of 1997 compared with the same periods in 1996 due to an
increase in pre-tax operating income, net of interest expense.



OTHER INCOME

     Income tax benefits included in Other Income decreased $53.2
million in the third quarter and $41.1 million in the first nine
months of 1997 compared with the same periods of 1996 due primarily to
decreased NOL benefit recognition.  The company recognized $13.1
million of NOL benefit in the third quarter of 1997 compared to $70.3
million in the third quarter of 1996.  As of the end of September
1997, on a cumulative basis the Company has recognized in its income
statement the full amount of NOL benefit that the Company expects to
utilize on future income tax returns.  Additional amounts of NOL
benefit which may be recognized in the future in the Company's income
statement are at present indeterminate due to the interplay of open
tax years for which tax assessments may be made and varying expiration
dates of federal and state NOL carryforwards.

     A Reversal of Loss Provision in the amount of $8.5 million was
recorded in the third quarter of 1996.  The reversal of loss provision
relates to the satisfaction by the Company's former investment
subsidiaries of approximately $8.5 million of short-term debt
obligations through the assignment of certain finance receivables held
by such investment subsidiaries.  Results for the first nine months of
1997 include a Reversal of Loss provision in the amount of $10.2
million recorded in the second quarter of 1997 to reflect the
dissolution of certain subsidiaries which formed part of the Company's
former investment operations.  
See Note 4 of Notes to Condensed Consolidated Financial Statements, 
Consolidated Subsidiaries.


INTEREST EXPENSE

     Interest expense on long-term debt increased in the third quarter
and first nine months of 1997 relative to the same periods in 1996 due
to the refinancing of certain variable and fixed rate debt obligations
with unsecured fixed rate debt obligations, having later maturity
dates, at higher interest rates (see Financing Developments--
Sale of New Bonds, below), as well as higher average interest rates
on the Company's variable debt obligations.  The weighted average
interest rate on the Company's variable rate debt obligations was 3.7%
for the first nine months of 1997 compared to 3.5% for the same period
in 1996.

     Other Interest Expense was lower in the third quarter and first
nine months of 1997 compared with the same periods in 1996 due to $1.9
million in interest expense incurred in the third quarter of 1996
related to the 1996 contested sales tax assessment of $7.3 million.

EVENTS AFFECTING FUTURE RESULTS OF UTILITY OPERATIONS

NTUA WHOLESALE POWER CONTRACT

    On June 26, 1997, the Company signed an agreement to extend and
restructure its current wholesale power sale agreement with the Navajo
Tribal Utility Authority (NTUA).  NTUA has purchased approximately 60
MW of power annually since 1993.  Under the terms of the Amended and
Restated Power Supply Agreement, firm capacity sales will be provided
in two phases.  The first phase runs through May 31, 1999, the
original termination date under the replaced agreement.  The second
phase will extend through December 31, 2009.  During phase one, the
Company will continue to serve NTUA's full power requirements in
excess of energy and capacity from NTUA's hydroelectric resource.  The
new contract also provides NTUA the opportunity and ability to serve
new industrial loads through purchases in the wholesale marketplace.
Phase two of the agreement calls for NTUA to continue purchasing firm
power from the Company, while becoming a partial requirements customer
with a variety of options to serve its remaining needs.  The Company
will provide 40 MW of firm power to NTUA in the summer months and 50
MW of firm power in the winter months.

     The Company's annual revenues from wholesale sales to NTUA under
the previous terms of the sales agreement were approximately $16.5
million per year.  In phase one of the restructured agreement, the
Company's annual revenues from sales to NTUA are estimated to be
approximately $15 million per year.  In the first year of phase two,
revenues from sales to NTUA are estimated to range from $9 million to
$16 million.

     The new agreement was approved by the FERC on August 20, 1997.
Under the new agreement, the Company will provide generation service
pursuant to the Power Supply Agreement, while providing the
transmission and ancillary services necessary to actually deliver
power pursuant to separate network service and operating agreements in
accordance with the requirements of FERC Order 888.



    SPRINGERVILLE COAL SUPPLY CONTRACT

     On June 27, 1997, the Company signed an agreement with Peabody
Coalsales to terminate the then existing coal supply contract for the
Springerville Generating Station, and enter into a new contract with
the same supplier.  A $50 million termination fee was incurred by the
Company, payable in three installments: $30 million paid on June 30,
1997, $10 million paid on September 30, 1997, and $10 million due
March 31, 1998.  The new contract contains more favorable terms to the
Company than the previous contract for certain volume, incremental
volume, base price, incremental price and price adjustment mechanism
requirements.  The Company estimates that savings under the new
contract will be approximately $10 million per year initially and will
increase thereafter, resulting in approximately $97.5 million of
savings on a present value basis over the life of the contract.

     The Springerville Generating Station consists of two 380 MW coal
fired generating units which account for 38% of the Company's total
net generating capability.  The previous coal supply contract covered
the useful lives of Springerville Units 1 and 2 and contained a
bilateral option to renegotiate the contract price and escalation
procedures in 2009 and at intervals of every five years thereafter,
with various adjustment clauses which would affect the future cost of
delivered coal.  The new coal contract has an initial term of 13
years, beginning July 1, 1997, and ending June 30, 2010, with an
option to extend for ten years thereafter.  During the extension term,
the coal supplier has the right of first refusal to match competing
offers for a portion of Springerville coal requirements.

     On July 29, 1997, the ACC issued an interim accounting order
allowing the Company to defer the $50 million termination fee as a
regulatory asset until the ACC decides whether the termination fee
should be recovered through retail rates.  The interim accounting
order also allows the Company to begin amortizing the termination fee
to fuel expense over the 13 year initial term of the agreement.  See
Note 3 of Notes to Condensed Consolidated Financial Statements, 
Springerville Coal Contract.


LIQUIDITY AND CAPITAL RESOURCES
- -------------------------------

     The Company expects to generate sufficient cash flows during 1997
to fund its continuing operating activities and construction
expenditures.  However, the Company's projected cash flows are subject
to variation due to changes in wholesale revenues, changes in short-
term interest rates, and other factors.  For example, an increase in
short-term interest rates of 100 basis points (1%) would result in an
approximate $6 million increase in annual interest payments.  If cash
flows were to fall short of expectations, the Company would rely on
existing cash balances, borrowings under the Renewable Term Loan and,
if necessary, borrowings under the Revolving Credit.

     At November 5, 1997, there was no outstanding balance due under
the Renewable Term Loan, and to date, no amount has been borrowed
under the Revolving Credit.  The Renewable Term Loan commitment
decreased from $156 million at March 31, 1997 to $134 million at June
30, 1997, and to $127.5 million at September 30, 1997.  The commitment
was reduced by $16 million at April 29, 1997 in accordance with the
terms of the MRA provisions regarding the optional prepayment of debt
obligations, which encompassed the April 1997 refinancing of $31.4
million of floating rate IDBs (see Financing Developments below).
Mandatory quarterly commitment reductions of $6.7 million each were
effective as of June 30, 1997 and September 30, 1997 in accordance
with the terms of the MRA, whereby the commitment is scheduled to
decrease by approximately 5% per quarter during 1997 and by 10% per
quarter in 1998 and 1999.  The Revolving Credit commitment remained at
$50 million as of November 5, 1997.

     The Company's cash and cash equivalents balance at November 5,
1997 was approximately $137 million.  Cash balances are invested in
investment grade money-market securities with an emphasis on
preserving the principal amounts invested.

CASH FLOWS

     The Company's cash and cash equivalents increased by $21.8
million or 22%, from the September 30, 1996 ending balance to the
September 30, 1997 balance of $119.8 million.  This increase was due
to the receipt of net cash flows from operating activities in excess
of the net cash flows required for investing and financing activities
for the twelve month period ended September 30, 1997.

     Net cash flows from operating activities decreased in aggregate
by $26.9 million in the first nine months of 1997 compared with the
same period in 1996.  This decrease was due to the $40.0 million in
contract termination fees paid to a major coal supplier in the second
and third quarters of 1997 (see Springerville Coal Supply Contract above).
Excluding this contract termination fee, net cash flows from operating 
activities increased by $13.1 million, or 13.2%, in the first nine months 
of 1997 compared with the same period in 1996.  This increase was due 
primarily to an increase in cash receipts from retail and wholesale 
customers and a $13.5 million reduction in wages paid (net of amounts 
capitalized), compared with the same period in 1996.  The reduction in 
wages paid reflected payments made to employees under the VSP in 1996.  
These increases to net cash flows were partially offset by higher fuel and
purchased power costs, an $11.9 million increase in payment of other
operations and maintenance costs in the first nine months of 1997, and
the receipt of $4.1 million in cash related to the sale of emission
allowances in the first quarter of 1996.

     Net cash outflows from investing activities decreased in
aggregate by $6.6 million in the first nine months of 1997 compared
with the same period in 1996, due to a reduction in both construction
expenditures and investments and loans to joint ventures.

     Net cash outflows from financing activities increased in
aggregate by $3.1 million in the first nine months of 1997 compared
with the same period in 1996.

FINANCING DEVELOPMENTS

   SALE OF NEW BONDS

     On April 29, 1997, the City of Farmington, New Mexico issued
$80.41 million aggregate principal amount of its 1997 Series A
Pollution Control Revenue Bonds (Tucson Electric Power Company San
Juan Project) for the benefit of the Company.  The proceeds from this
issuance were made available to the Company under an installment sale
agreement and were used on June 12, 1997 to redeem all of the City of
Farmington's Series 1973 Pollution Control Revenue bonds (Tucson Gas &
Electric Company San Juan Project), 6.25% due in 2003 ($47.91 million
aggregate principal amount) and all of the City of Farmington's 1977
Series A Collateralized Pollution Control Revenue bonds (Tucson Gas &
Electric Company San Juan Project), 6.10% due 2007 ($32.5 million
aggregate principal amount).  The Farmington 1977 Series A bonds were
secured by an equal principal amount of First Mortgage Bonds, which
were cancelled.  The new bonds, which are unsecured, bear interest at
a fixed annual rate of 6.95% and mature in October 2020.

     On April 29, 1997, the Coconino County, Arizona Pollution Control
Corporation issued $36.7 million aggregate principal amount of its
1997 Series A Pollution Control Revenue Bonds (Tucson Electric Power
Company Navajo Project) for the benefit of the Company.  The proceeds
from this issuance were loaned to the Company and were used on June 4,
1997 to (i) redeem all of the 1996 Series A Pollution Control Revenue
Bonds (Tucson Electric Power Company Project), variable rate due 2031
($16.7 million aggregate principal amount) and (ii) fund the
construction of additional pollution abatement facilities at the
Navajo Generating Station.  The new bonds, which are unsecured, bear
interest at a fixed annual rate of 7.125% and mature in October 2032.

     On April 29, 1997, the Coconino County, Arizona Pollution Control
Corporation also issued $14.7 million aggregate principal amount of
its 1997 Series B Pollution Control Revenue Bonds (Tucson Electric
Power Company Navajo Project) for the benefit of the Company.  The
proceeds from this issuance were loaned to the Company and were used
on June 4, 1997 to redeem all of the 1996 Series B Pollution Control
Refunding Revenue Bonds (Tucson Electric Power Company Project),
variable rate due 2031 ($14.7 million aggregate principal amount).
The new bonds, which are unsecured, bear interest at a fixed annual
rate of 7.00% and mature in October 2032.

     In addition to the redemption of the Coconino bonds, the letters
of credit which provided credit support, and certain First Mortgage
Bonds, which collateralized the letters of credit, were also
eliminated.   Therefore, the aggregate principal amount of Company
debt backed by letters of credit was reduced from $805 million to $774
million and the aggregate principal amount of First Mortgage Bonds
outstanding was reduced by $34.5 million.

     On October 1, 1997, the Industrial Development Authority of the
County of Pima, Arizona issued $22.5 million aggregate principal
amount of its 1997 Series A Industrial Development Bonds (Tucson
Electric Power Company Project) for the benefit of the Company.  The
proceeds from this issuance have been loaned to the Company and (i)
were used to redeem all of the 1990 Series A Industrial Development
Bonds, variable rate due 2025 ($20 million aggregate principal amount)
on November 5, 1997 and (ii) will finance improvements to the
Company's lower voltage electric transmission and distribution system
in Pima County.  The new bonds, which are unsecured, bear interest at
a rate of 6.10% and mature in September 2025.

     On October 1, 1997, the Industrial Development Authority of Pima
County, Arizona issued $150 million aggregate principal amount of its
1997 Series B Industrial Development Bonds (Tucson Electric Power
Company Project) for the benefit of the Company.  The proceeds from
this issuance have been loaned to the Company and will be used on
November 17, 1997 to redeem $150 million aggregate principal amount of
1982 Series A Industrial Development Bonds, variable rate, due 2022.
The new bonds, which are unsecured, bear interest at a rate of 6.00%
and mature in September 2029.

     On October 1, 1997, the Industrial Development Authority of Pima
County, Arizona issued $75 million aggregate principal amount of its
1997 Series C Industrial Development Bonds (Tucson Electric Power
Company Project) for the benefit of the Company.  The proceeds from
this issuance have been loaned to the Company and will be used on
November 17, 1997 to redeem $75 million aggregate principal amount of
1983 Series A Industrial Development Bonds, variable rate, due 2018.
The new bonds, which are unsecured, bear interest at a rate of 6.00%
and mature in September 2029.

     The redeemed Pima bonds are backed by letters of credit under the
MRA.  Upon redemption of such Pima bonds, the aggregate principal
amount of Company debt backed by letters of credit will be reduced
from $774 million to $529 million.

    FINANCING APPLICATION FILED WITH ACC

     On July 11, 1997, the Company filed an application with the ACC
requesting authority to enter into certain financing transactions.
The proposed financing transactions are intended to extend debt
maturities and letter of credit expiration dates, gain additional
financial and operating flexibility through the replacement or
modification of certain credit agreements, reduce exposure to variable
interest rates, reduce dependence on letters of credit and strengthen
the Company's balance sheet by raising additional equity capital.  The
application requests authorization for four financings.  First, the
Company seeks authority to refinance up to $450 million of existing
tax-exempt variable rate debt obligations currently backed by letters
of credit.  These refinancings are expected to be on a fixed rate,
unsecured basis.  Second, the Company seeks authority to replace its
current bank credit facilities under the MRA, with one or more new
bank credit facilities.  The Company anticipates that the new credit
facilities will be reduced in size (due to the refinancing activity
described above), will have extended maturities or termination dates,
and will contain less restrictive covenants than those contained in
the MRA.  Third, the Company requests authority to refinance up to
$184 million in First Mortgage Bonds, scheduled to mature between 1999
and 2003, with the issuance of new securities consisting of debt
and/or equity securities.  Fourth, the Company seeks authority to
establish a direct stock purchase plan, which would allow small
investors to purchase shares directly from the Company.  Pursuant to
this plan, the Company would issue from time to time up to 1,000,000
shares of Common Stock, without par value.

     On August 26, 1997, the ACC approved the section of the financing
application requesting authority to refinance up to $450 million of
existing tax-exempt variable rate debt obligations.  This allowed the
Company to proceed with the October 1, 1997 bond sale transactions
outlined above in Financing Developments--Sale of New Bonds.  The ACC
is expected to rule on the remaining portions of the financing
application in the fourth quarter of 1997.

     Subject to ACC authorization, the Company intends to replace the
current bank credit facilities under the MRA with one or more new bank
credit facilities during the fourth quarter of 1997 and intends to
pursue the negotiation and consummation of the remaining transactions
over the next two years.  Even if ACC authorization is granted, there
can be no assurance that any of the contemplated transactions, other
than the October 1, 1997 bond sale transactions, will be consummated
or that the terms of any transactions which are consummated will
result in the realization of the Company's objectives.

     The Company expects to incur increased financing costs as a
result of the completion of the proposed financings.  The Company
believes, however, that such costs are outweighed by the related
benefits, including the extension of maturities, reduction in
volatility of capital costs, elimination of certain restrictions on
dividends and increases in equity capital.



YEAR 2000 ISSUE
- ---------------

     The Company has and will continue to make modifications to its
computer systems and applications to ensure that year 2000
transactions can be processed.  The Company currently estimates that
the costs associated with this project are not material to the
Company's operating results.


SAFE HARBOR FOR FORWARD-LOOKING STATEMENTS
- ------------------------------------------

      This Quarterly Report on Form 10-Q contains forward-looking
statements as defined by the Private Securities Litigation Reform Act
of 1995.  The Company is including the following cautionary statements
to make applicable and take advantage of the safe harbor provisions of
the Private Securities Litigation Reform Act of 1995 for any forward-
looking statements made by, or on behalf, of the Company in this
Quarterly Report on Form 10-Q.  Forward-looking statements include
statements concerning plans, objectives, goals, strategies, future
events or performance and underlying assumptions and other statements
which are other than statements of historical facts.  Such forward-
looking statements may be identified, without limitation, by the use
of the words "anticipates," "estimates," "expects," "intends,"
"plans," "predicts," "projects," and similar expressions.  From time
to time, the Company may publish or otherwise make available forward-
looking statements of this nature.  All such forward-looking
statements, whether written or oral, and whether made by or on behalf
of the Company, are expressly qualified by these cautionary statements
and any other cautionary statements which may accompany the forward-
looking statements.  In addition, the Company disclaims any obligation
to update any forward-looking statements to reflect events or
circumstances after the date hereof.

      Forward-looking statements involve risks and uncertainties which
could cause actual results or outcomes to differ materially from those
expressed in the forward-looking statements.  The Company's
expectations, beliefs and projections are expressed in good faith and
are believed by the Company to have a reasonable basis, including
without limitation, management's examination of historical operating
trends, data contained in the Company's records and other data
available from third parties, but there can be no assurance that
management's expectations, beliefs or projections will result or be
achieved or accomplished.  In addition to other factors and matters
discussed elsewhere herein, some of the important factors that, in the
view of the Company, could cause actual results to differ materially
from those discussed in the forward-looking statements include the
following:

1. Effects of restructuring initiatives in the electric industry and
   other energy-related industries.

2. Changes in economic conditions, demographic patterns and weather
   conditions in the Company's retail service area.

3. Changes affecting the Company's cost of providing electrical
   service including, but not limited to, changes in fuel costs,
   generating unit operating performance, interest rates, tax laws,
   environmental laws, and the general rate of inflation.

4. Changes in governmental policies and regulatory actions with
   respect to allowed rates of return, financings, rate structures,
   and methods of establishing rates.

5. Changes affecting the cost of competing energy alternatives,
   including changes in available generating technologies and changes
   in the cost of natural gas.

6. Changes in accounting principles or the application of such
   principles to the Company.


                     PART II - OTHER INFORMATION

ITEM 1. -- LEGAL PROCEEDINGS


TAX ASSESSMENTS

     See Note 1 of
Notes to Condensed Consolidated Financial Statements,Tax Assessments.




ITEM 6. -- EXHIBITS AND REPORTS ON FORM 8-K


(a)  Exhibits.

     -- See Exhibit Index.

(b)   Reports on Form 8-K.

     -- The company has not filed any Current Reports on Form 8-K
          since filing the Form 10-Q for the Quarter Ending June 30,
          1997.


                              SIGNATURE


     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.


                                   TUCSON ELECTRIC POWER COMPANY
                                   ------------------------------
                                             (Registrant)


Date:  November 10, 1997                     Ira R. Adler
                                   ------------------------------   
                                             Ira R. Adler
                                      Senior Vice President and
                                     Principal Financial Officer


                            EXHIBIT INDEX

     4a -  Loan Agreement, dated as of September 15, 1997, between The
        Industrial Development Authority of the County of Pima and
        the Registrant relating to Industrial Development Revenue
        Bonds, 1997 Series A (Tucson Electric Power Company Project).
     4b -  Indenture of Trust, dated as of September 15, 1997, between
        The Industrial Development Authority of the County of Pima
        and First Trust of New York, National Association,
        authorizing Industrial Development Revenue Bonds, 1997 Series
        A (Tucson Electric Power Company Project).
     4c -  Loan Agreement, dated as of September 15, 1997, between The
        Industrial Development Authority of the County of Pima and
        the Registrant relating to Industrial Development Revenue
        Bonds, 1997 Series B (Tucson Electric Power Company Project).
     4d -  Indenture of Trust, dated as of September 15, 1997, between
        The Industrial Development Authority of the County of Pima
        and First Trust of New York, National Association,
        authorizing Industrial Development Revenue Bonds, 1997 Series
        B (Tucson Electric Power Company Project).
     4e -  Loan Agreement, dated as of September 15, 1997, between The
        Industrial Development Authority of the County of Pima and
        the Registrant relating to Industrial Development Revenue
        Bonds, 1997 Series C (Tucson Electric Power Company Project).
     4f -  Indenture of Trust, dated as of September 15, 1997, between
        The Industrial Development Authority of the County of Pima
        and First Trust of New York, National Association,
        authorizing Industrial Development Revenue Bonds, 1997 Series
        C (Tucson Electric Power Company Project).
     15 -  Letter regarding unaudited interim financial information.
     27 -  Financial Data Schedule.






                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                     Exhibit 15
                                                               
                                                               




Tucson Electric Power Company
220 West Sixth Street
Tucson, Arizona  85701

We have made a review, in accordance with standards established
by the American Institute of Certified Public Accountants, of
the unaudited interim financial information of Tucson Electric
Power Company and subsidiaries (the Company) for the three-
month and nine-month periods ended September 30, 1997 and 1996, as
indicated in our report dated October 20, 1997; because we did not
perform an audit, we expressed no opinion on that information.

We are aware that our report referred to above, which is
included in your Quarterly Report on Form 10-Q for the
quarter ended September 30, 1997, is incorporated by reference in
Post-Effective Amendment No. 1 to Registration Statement No. 33-
55732 of the Company on Form S-3, Registration Statement No. 33-
58173 of UniSource Energy Corporation on Form S-4, Registration 
Statements No. 33-56523, No. 33-57233 and No. 33-57231 of the
Company on Form S-8 and Registration Statement No. 33-31043 on
Form S-3.

We are also aware that the aforementioned report, pursuant to
Rule 436(c) under the Securities Act of 1933, is not considered
a part of the Registration Statement prepared or certified by
an accountant or a report prepared or certified by an
accountant within the meaning of Sections 7 and 11 of that Act.



DELOITTE & TOUCHE LLP

Tucson, Arizona
November 10, 1997


<TABLE> <S> <C>

<ARTICLE> UT
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               SEP-30-1997
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,932,073
<OTHER-PROPERTY-AND-INVEST>                     71,372
<TOTAL-CURRENT-ASSETS>                         279,767
<TOTAL-DEFERRED-CHARGES>                       330,932
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,614,144
<COMMON>                                       638,939
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (420,790)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 218,149
                                0
                                          0
<LONG-TERM-DEBT-NET>                         1,205,951
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                      500
                            0
<CAPITAL-LEASE-OBLIGATIONS>                    887,820
<LEASES-CURRENT>                                15,163
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 286,561
<TOT-CAPITALIZATION-AND-LIAB>                2,614,144
<GROSS-OPERATING-REVENUE>                      568,340
<INCOME-TAX-EXPENSE>                            21,070
<OTHER-OPERATING-EXPENSES>                     436,540
<TOTAL-OPERATING-EXPENSES>                     457,610
<OPERATING-INCOME-LOSS>                        110,730
<OTHER-INCOME-NET>                              52,719
<INCOME-BEFORE-INTEREST-EXPEN>                 163,449
<TOTAL-INTEREST-EXPENSE>                        78,641
<NET-INCOME>                                    84,808
                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   84,808
<COMMON-STOCK-DIVIDENDS>                             0
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                          72,452
<EPS-PRIMARY>                                     2.64
<EPS-DILUTED>                                     2.64
        



</TABLE>


                                                           Exhibit 4a
          =================================================================




                                    LOAN AGREEMENT
                                   (1997 SERIES A)


                                       BETWEEN



                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA




                                         AND



                            TUCSON ELECTRIC POWER COMPANY




                                       --------




                            DATED AS OF SEPTEMBER 15, 1997



                                       --------



                                     Relating To

                        Industrial Development Revenue Bonds,
                                    1997 Series A
                       (Tucson Electric Power Company Project)



          =================================================================


          <PAGE>

                                  TABLE OF CONTENTS*

                                                                       Page
                                                                       ----

             LOAN AGREEMENT . . . . . . . . . . . . . . . . . . . . . .   1

                                      ARTICLE I

                                     DEFINITIONS
               SECTION 1.01   Definitions . . . . . . . . . . . . . . .   1
               SECTION 1.02   Incorporation of Certain Definitions by
                              Reference . . . . . . . . . . . . . . . .   5

                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES
               SECTION 2.01   Representations and Warranties of the
                              Authority . . . . . . . . . . . . . . . .   5
               SECTION 2.02   Representations and Warranties of the
                              Company . . . . . . . . . . . . . . . . .   5

                                     ARTICLE III

                                    THE FACILITIES
               SECTION 3.01   Construction of the Facilities  . . . . . . 6
               SECTION 3.02   Insufficient Moneys in Construction Fund  . 6
               SECTION 3.03   Revision of Plans and Specifications  . . . 7
               SECTION 3.04   Certification of Completion Date  . . . . . 7
               SECTION 3.05   Maintenance of Facilities; Remodeling . . . 7
               SECTION 3.06   Insurance . . . . . . . . . . . . . . . . . 7
               SECTION 3.07   Condemnation  . . . . . . . . . . . . . . . 7
               SECTION 3.08   Termination of Construction . . . . . . . . 8

                                      ARTICLE IV

              ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS
                                     OF THE BONDS
               SECTION 4.01   Issuance of the Bonds . . . . . . . . . . . 8
               SECTION 4.02   Issuance of Other Obligations . . . . . . . 8
               SECTION 4.03   The Loans; Disposition of Bond Proceeds . . 8
               SECTION 4.04   Disbursements from Construction Fund  . . . 9
               SECTION 4.05   Investment of Moneys in Funds and
                              Accounts. . . . . . . . . . . . . . . . .  10

                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS
               SECTION 5.01   Loan Payments.  . . . . . . . . . . . . .  10
               SECTION 5.02   Payments Assigned; Obligation Absolute  .  10
               SECTION 5.03   Payment of Expenses . . . . . . . . . . .  10
               SECTION 5.04   Indemnification . . . . . . . . . . . . .  11
               SECTION 5.05   Payment of Taxes; Discharge of Liens  . .  11

          ____________________

          *  This table of contents is not part of the Loan Agreement, and
             is for convenience only.  The captions herein are of no legal
             effect and do not vary the meaning or legal effect of any part
             of the Loan Agreement.


          <PAGE>

                                      ARTICLE VI

                                  SPECIAL COVENANTS
               SECTION 6.01   Maintenance of Corporate Existence  . . .  11
               SECTION 6.02   Permits or Licenses . . . . . . . . . . .  12
               SECTION 6.03   Authority's Access to Facilities  . . . .  12
               SECTION 6.04   Tax-Exempt Status of Interest on Bonds. .  12
               SECTION 6.05   Use of Facilities . . . . . . . . . . . .  13
               SECTION 6.06   Financing Statements  . . . . . . . . . .  13

                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING
               SECTION 7.01   Conditions  . . . . . . . . . . . . . . .  14
               SECTION 7.02   Instrument Furnished to the Authority and
                              Trustee . . . . . . . . . . . . . . . . .  15
               SECTION 7.03   Limitation  . . . . . . . . . . . . . . .  15

                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES
               SECTION 8.01   Events of Default . . . . . . . . . . . .  16
               SECTION 8.02   Force Majeure . . . . . . . . . . . . . .  16
               SECTION 8.03   Remedies  . . . . . . . . . . . . . . . .  16
               SECTION 8.04   No Remedy Exclusive . . . . . . . . . . .  17
               SECTION 8.05   Reimbursement of Attorneys' and Agents'
                              Fees  . . . . . . . . . . . . . . . . . .  17
               SECTION 8.06   Waiver of Breach  . . . . . . . . . . . .  17

                                      ARTICLE IX

                                 REDEMPTION OF BONDS
               SECTION 9.01   Redemption of Bonds . . . . . . . . . . .  17
               SECTION 9.02   Compliance with the Indenture . . . . . .  18

                                      ARTICLE X

                                    MISCELLANEOUS
               SECTION 10.01  Term of Agreement . . . . . . . . . . . .  18
               SECTION 10.02  Notices . . . . . . . . . . . . . . . . .  18
               SECTION 10.03  Parties in Interest . . . . . . . . . . .  18
               SECTION 10.04  Amendments  . . . . . . . . . . . . . . .  18
               SECTION 10.05  Counterparts  . . . . . . . . . . . . . .  19
               SECTION 10.06  Severability  . . . . . . . . . . . . . .  19
               SECTION 10.07  Governing Law . . . . . . . . . . . . . .  19


          Signatures  . . . . . . . . . . . . . . . . . . . . . . . . .  20
          Exhibit A - Description of the Facilities . . . . . . . . .   A-1


          <PAGE>


                                    LOAN AGREEMENT

               THIS LOAN AGREEMENT (1997 Series A), dated as of September
          15, 1997 (this "Agreement"), between THE INDUSTRIAL DEVELOPMENT
          AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona (hereinafter called the "Authority"), and TUCSON ELECTRIC
          POWER COMPANY, a corporation organized and existing under the
          laws of the State of Arizona (hereinafter called the "Company"),

                                W I T N E S S E T H :

               WHEREAS, the Authority is authorized and empowered under
          Title 35, Chapter 5, Arizona Revised Statutes, as amended (the
          "Act"), to issue its bonds in accordance with the Act and to make
          secured or unsecured loans for the purpose of financing or
          refinancing the acquisition, construction, improvement or
          equipping of projects consisting of land, any building or other
          improvement, and all real and personal properties, including but
          not limited to machinery and equipment, whether or not now in
          existence or under construction, whether located within or
          without Pima County, which shall be suitable for, among other
          things, facilities for the furnishing of electric energy, gas or
          water, air and water pollution control facilities and sewage and
          solid waste disposal facilities, and to charge and collect
          interest on such loans and pledge the proceeds of loan agreements
          as security for the payment of the principal of and interest on
          bonds, or designated issues of bonds, issued by the Authority and
          any agreements made in connection therewith, whenever the Board
          of Directors of the Authority finds such loans to be in
          furtherance of the purposes of the Authority or in the public
          interest;

               WHEREAS, the Authority has heretofore issued and sold
          $20,000,000 aggregate principal amount of its Industrial
          Development Revenue Bonds, 1990 Series A (Tucson Electric Power
          Company Project), all of which remain outstanding (the "1990
          Bonds"), the proceeds of which were loaned to the Company to
          finance a portion of the costs of the acquisition, construction,
          improvement and equipping of certain of the facilities for
          furnishing electric energy described in Exhibit A hereto (the
          "Facilities");

               WHEREAS, the Authority proposes to issue and sell its
          revenue bonds for the purpose of financing a portion of the costs
          of the acquisition, construction, improvement and equipping of
          certain additional items of the Facilities and for the purpose of
          refinancing, by the payment or redemption of the 1990 Bonds, or
          provision therefor, the portion of the costs of the acquisition,
          construction, improvement and equipping of the Facilities
          previously financed with the proceeds of the 1990 Bonds; and

               NOW, THEREFORE, the parties hereto, intending to be legally
          bound hereby and in consideration of the premises, DO HEREBY
          AGREE as follows:


                                      ARTICLE I

                                     DEFINITIONS

               SECTION 1.01  Definitions.  The terms defined in this
          Article I shall for all purposes of this Agreement have the
          meanings herein specified, unless the context clearly requires
          otherwise:

          Act:
               "Act" shall mean Title 35, Chapter 5, Arizona Revised
          Statutes, and all acts supplemental thereto or amendatory
          thereof.

          Administration Expenses:

               "Administration Expenses" shall mean the reasonable expenses
          incurred by the Authority with respect to this Agreement, the
          Indenture and any transaction or event contemplated by this
          Agreement or the Indenture, including the compensation and
          reimbursement of expenses and advances payable to the Trustee, to
          the paying agent, any co-paying agent and the registrar under the
          Indenture and a pro rata share of the Authority's annual
          operating expenses in accordance with the provisions of paragraph
          XII.D. of the Authority's Procedural Pamphlet.

          Agreement:

               "Agreement" shall mean this Loan Agreement, dated as of
          September 15, 1997, between the Authority and the Company, and
          any and all modifications, alterations, amendments and
          supplements hereto.

          Authority:

               "Authority" shall mean The Industrial Development Authority
          of the County of Pima, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona incorporated for and with the approval of Pima County,
          Arizona, pursuant to the provisions of the Constitution of the
          State of Arizona and the Act, its successors and their assigns.

          Authorized Company Representative:

               "Authorized Company Representative" shall mean each person
          at the time designated to act on behalf of the Company by written
          certificate furnished to the Authority and the Trustee containing
          the specimen signature of such person and signed on behalf of the
          Company by its President, any Vice President or its Treasurer,
          together with its Secretary or any Assistant Secretary.

          Bond Counsel:

               "Bond Counsel" shall mean any firm or firms of nationally
          recognized bond counsel experienced in matters pertaining to the
          validity of, and exclusion from gross income for federal tax
          purposes of interest on bonds issued by states and political
          subdivisions, selected by the Company and acceptable to the
          Authority.

          Bond Fund:

               "Bond Fund" shall mean the fund created by Section 4.01 of
          the Indenture.

          Bonds:

               "Bond" or "Bonds" shall mean the Industrial Development
          Revenue Bonds, 1997 Series A (Tucson Electric Power Company
          Project) of the Authority.

          Capital Account:

               "Capital Account" shall mean any of the accounts so named
          established under Sections 4.01 and 5.01 of the Indenture.

          Code:

               "Code" shall mean the Internal Revenue Code of 1986 or any
          successor statute thereto.  Each reference to a section of the
          Code herein shall be deemed to include the United States Treasury
          Regulations proposed or in effect thereunder and applicable to
          the Bonds or the use of the proceeds thereof, unless the context
          clearly requires otherwise.  Reference to any particular Code
          section shall, in the event of a successor Code, be deemed to be
          a reference to the successor to such Code section.

          Company:

               "Company" shall mean Tucson Electric Power Company, a
          corporation organized and existing under the laws of the State of
          Arizona, its successors and their assigns, including, without
          limitation, any successor obligor under Section 6.01 or 7.01 to
          the extent of the obligations assumed thereunder.

          Completion Date:

               "Completion Date" shall mean the date specified in Section
          3.04 hereof.

          Construction (and other forms of the word "construct"):

               "Construction" (and other forms of the word "construct")
          shall mean, when used with respect to the Facilities, the
          construction of the Facilities and shall include, without
          limitation, the acquisition, construction, improvement and
          equipping of the Facilities, all as contemplated by the Act.

          Construction Fund:

               "Construction Fund" shall mean the fund created by Section
          5.01 of the Indenture.

          Cost of Construction:

               "Cost of Construction" shall embrace all costs paid or
          incurred by the Company with respect to the Facilities and the
          financing thereof for the payment of which the Authority is
          authorized to issue bonds under the Act, and shall include
          without limitation (a) obligations paid or incurred by the
          Company for labor, materials and other expenses and to
          contractors, builders and materialmen in connection with the
          construction of the Facilities; (b) the costs paid or incurred by
          the Company for contract bonds and for insurance of all kinds
          that may be deemed by the Company to be desirable or necessary
          during the course of construction of the Facilities; (c) the
          expenses paid or incurred by the Company for test borings,
          surveys, estimates, plans and specifications, and preliminary
          investigations therefor, with respect to the Facilities and for
          supervising construction, as well as for the performance of all
          other duties required by or reasonably necessary for the proper
          construction, of the Facilities; (d) Administration Expenses paid
          or incurred prior to the Completion Date and legal, accounting,
          financial, underwriting, advertising, recording and printing
          expenses and all other fees and expenses paid or incurred by the
          Company in connection with the issuance and sale of the Bonds;
          (e) amounts in respect of interest (exclusive of accrued interest
          paid by the initial purchasers upon delivery thereof) accruing
          upon the Bonds until the Completion Date; (f) all other costs
          that the Company shall be required to pay under the terms of any
          contract or contracts for the construction of the Facilities; (g)
          any other costs or expenses paid or incurred by the Company, and
          any sums required to reimburse the Company for work done by it,
          with respect to the Facilities which are properly chargeable to
          the capital account of the Company with respect to the Facilities
          or would be so chargeable for federal income tax purposes either
          with a proper election or but for a proper election to deduct the
          same; and (h) amounts required to be paid to the United States by
          the Company (on behalf of the Authority) in respect of the Bonds
          pursuant to Section 148 of the Code.  For purposes of the
          application of the proceeds of the Bonds, the Cost of
          Construction shall be deemed to include the payment or
          redemption, or provision therefor, of any obligations, other than
          the Bonds, issued to finance or refinance any of the costs listed
          above.  The Cost of Construction shall also be deemed to include
          all costs paid or incurred with respect to the Facilities by any
          Person to whom the Facilities have been leased or sold as a whole
          or in part, provided that such costs, had they been paid or
          incurred by the Company, would otherwise constitute a portion of
          the Cost of Construction.

          Facilities:

               "Facilities" shall mean the real and personal properties,
          machinery and equipment currently existing, under construction
          and to be constructed which are described in Exhibit A hereto, as
          revised from time to time to reflect any changes therein,
          additions thereto, substitutions therefor and deletions therefrom
          permitted by the terms hereof, subject, however, to the
          provisions of Section 7.01 hereof.

          Indenture:

               "Indenture" shall mean the Indenture of Trust, dated as of
          September 15, 1997, between the Authority and the Trustee
          relating to the Bonds, and any and all modifications,
          alterations, amendments and supplements thereto.

          Investment Account:

               "Investment Account" shall mean any of the accounts so named
          established under Sections 4.01 and 5.01 of the Indenture.

          Loan Payments:

               "Loan Payments" shall mean the payments required to be made
          by the Company pursuant to Section 5.01 hereof.

          1990 Bonds:

               "1990 Bonds" shall mean the $20,000,000 aggregate principal
          amount of the Authority's Industrial Development Revenue Bonds,
          1990 Series A (Tucson Electric Power Company Project).

          Outstanding:

               "Outstanding", when used in reference to the Bonds, shall
          mean, as at any particular date, the aggregate of all Bonds
          authenticated and delivered under the Indenture except:

                    (a)  those canceled by the Trustee at or prior to such
               date or delivered to or acquired by the Trustee at or prior
               to such date for cancellation;

                    (b)  those deemed to be paid in accordance with Article
               VIII of the Indenture; and

                    (c)  those in lieu of or in exchange or substitution
               for which other Bonds shall have been authenticated and
               delivered pursuant to the Indenture, unless proof
               satisfactory to the Trustee and the Company is presented
               that such Bonds are held by a bona fide holder in due
               course.

          Person:

               "Person" means (i) any corporation, limited liability
          company, partnership, joint venture, association, joint-stock
          company, business trust or unincorporated organization, in each
          case formed or organized under the laws of the United States of
          America, any state thereof or the District of Columbia, or (ii)
          the United States of America or any state thereof, or any
          political subdivision of either thereof, or any agency, authority
          or other instrumentality of any of the foregoing.

          Tax Agreement:

               "Tax Agreement" shall mean that tax certificate and
          agreement, dated the date of the initial authentication and
          delivery of the Bonds, between the Authority and the Company,
          relating to the requirements of the Code, and any and all
          modifications, alterations, amendments and supplements thereto.

          Trustee:

               "Trustee" shall mean First Trust of New York, National
          Association, as trustee under the Indenture, its successors in
          trust and their assigns.

               SECTION 1.02  Incorporation of Certain Definitions by
          Reference.  Each capitalized term used herein and not otherwise
          defined herein shall have the meaning set forth in the Indenture.


                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES

               SECTION 2.01  Representations and Warranties of the
          Authority.  The Authority makes the following representations and
          warranties as the basis for the undertakings on the part of the
          Company contained herein:

                    (a)  The Authority is an Arizona nonprofit corporation
               designated by law as a political subdivision of the State of
               Arizona created and existing under the Constitution and laws
               of the State of Arizona;

                    (b)   The Authority has the power to enter into this
               Agreement and the Indenture and to perform and observe the
               agreements and covenants on its part contained herein and
               therein, including without limitation the power to issue and
               sell the Bonds as contemplated herein and in the Indenture,
               and by proper action has duly authorized the execution and
               delivery hereof and thereof; and

                    (c)  The execution and delivery of this Agreement and
               the Indenture by the Authority do not, and consummation of
               the transactions contemplated hereby and fulfillment of the
               terms hereof and thereof by the Authority will not, result
               in a breach of any of the terms or provisions of, or
               constitute a default under, any indenture, mortgage, deed of
               trust or other agreement or instrument to which the
               Authority is now a party or by which it is now bound, or, to
               the best knowledge of the Authority, any order, rule or
               regulation applicable to the Authority of any court or of
               any regulatory body or administrative agency or other
               governmental body having jurisdiction over the Authority or
               over any of its properties, or the Constitution or laws of
               the State of Arizona.

               SECTION 2.02  Representations and Warranties of the Company. 
          The Company makes the following representations and warranties as
          the basis for the undertakings on the part of the Authority
          contained herein:

                    (a)  The Company is a corporation duly organized and
               existing in good standing under the laws of the State of
               Arizona and duly qualified as a foreign corporation in the
               State of New Mexico;

                    (b)  The Company has power to enter into this Agreement
               and to perform and observe the agreements and covenants on
               its part contained herein and by proper corporate action has
               duly authorized the execution and delivery hereof and of all
               other documents required hereby to be executed by the
               Company;

                    (c)  The execution and delivery of this Agreement by
               the Company do not, and consummation of transactions
               contemplated hereby and fulfillment of the terms hereof by
               the Company will not, result in a breach of any of the terms
               or provisions of, or constitute a default under, any
               indenture, mortgage, deed of trust or other agreement or
               instrument to which the Company is a party or by which it is
               now bound, or the Restated Articles of Incorporation or
               by-laws of the Company, or any order, rule or regulation
               applicable to the Company of any court or of any regulatory
               body or administrative agency or other governmental body
               having jurisdiction over the Company or over any of its
               properties, or any statute of any jurisdiction applicable to
               the Company;

                    (d)  The Arizona Corporation Commission has approved
               all matters relating to the Company's participation in the
               transactions contemplated by this Agreement which require
               said approval, and no other consent, approval, authorization
               or other order of any regulatory body or administrative
               agency or other governmental body is legally required for
               the Company's participation therein, except such as may have
               been obtained or may be required under the securities laws
               of any jurisdiction;

                    (e)  The Facilities are to be used solely for purposes
               contemplated by the Act and are located or are to be located
               within the State of Arizona; and

                    (f)  The Company estimates that all of the proceeds of
               the Bonds (exclusive of accrued interest, if any, paid by
               the initial purchasers of such Bonds upon delivery thereof)
               will be expended to pay the Cost of Construction.


                                     ARTICLE III

                                    THE FACILITIES

               SECTION 3.01  Construction of the Facilities.  The Company
          shall cause the Facilities to be constructed with all reasonable
          dispatch in order to effectuate the purposes of the Act.  The
          Company shall have the sole responsibility under this Agreement
          for the construction of the Facilities and may perform the same
          itself or through its agents, and may make or issue such
          contracts, orders, receipts and instructions, and in general do
          or cause to be done all such other things as it may in its sole
          discretion consider requisite or advisable for the construction
          of the Facilities and for fulfilling its obligations under this
          Article III.  The Company shall have full authority and the sole
          right under this Agreement to supervise and control, directly or
          indirectly, all aspects of the construction of the Facilities. 
          The Authority shall have no right, title or interest in the
          Facilities, nor any obligation regarding the facilities.

               SECTION 3.02  Insufficient Moneys in Construction Fund.  If
          the moneys in the Construction Fund, together with any other
          moneys made available to pay the Cost of Construction, shall not
          be sufficient to pay the Cost of Construction in full, then the
          Company shall pay all that portion of the Cost of Construction in
          excess of the moneys available therefor.

               The Authority does not make any warranty, either express or
          implied, that the moneys which will be paid into the Construction
          Fund will be sufficient to pay the Cost of Construction in full.

               If the Company makes any payments pursuant to this Section
          3.02, it shall not be entitled to any reimbursement therefor from
          the Authority (except from the proceeds of any obligations
          subsequently issued by the Authority in respect of the
          Facilities), the Trustee or the Owners of the Bonds, nor shall it
          be entitled to any diminution in or postponement of the payment
          of the Loan Payments or the payment of any other amounts payable
          under this Agreement.

               SECTION 3.03  Revision of Plans and Specifications.  The
          Company may cause one or more revisions to be made to the plans
          and specifications for the Facilities (including without
          limitation any changes therein, additions thereto, substitutions
          therefor and deletions therefrom), at any time and from time to
          time prior to the Completion Date in any respect; provided,
          however, that, if any such revision shall render inaccurate the
          description of the Facilities contained in Exhibit A hereto, the
          Company shall deliver to the Authority and the Trustee (a) a
          revised Exhibit A containing a description of the Facilities as
          revised, the accuracy of which shall have been certified by an
          Authorized Company Representative, and (b) an opinion of Bond
          Counsel to the effect that the Facilities as described in the
          revised Exhibit A are such that the expenditure of the proceeds
          of the Bonds pursuant to this Agreement will not, in and of
          itself, impair the validity of the Bonds under the Act or the
          exclusion from gross income for federal tax purposes of interest
          on the Bonds.  A revision of Exhibit A hereto pursuant to this
          Section 3.03 shall not constitute an amendment, change or
          modification of this Agreement within the meaning of Article XII
          of the Indenture.

               SECTION 3.04  Certification of Completion Date.  The
          Completion Date shall be the date on which the Facilities are
          completed in their entirety and ready to be placed in service and
          operated, all as determined by the Company.  Promptly after the
          Completion Date, the Company shall submit to the Authority and
          the Trustee a certificate, executed by an Authorized Company
          Representative, which shall specify the Completion Date and shall
          state that (a) construction of the Facilities has been completed
          and the Cost of Construction has been paid, except for any
          portion thereof which has been incurred but is not then due and
          payable, or the liability for the payment of which is being
          contested or disputed by the Company, and for the payment of
          which the Trustee is directed to retain specified amounts of
          moneys in specified accounts within the Construction Fund, and
          (b) the Facilities are suitable for operation for the purposes
          for which they were designed.  Notwithstanding the foregoing,
          such certificate may state that it is given without prejudice to
          any rights against third parties which exist at the date thereof
          or which may subsequently come into being.

               SECTION 3.05  Maintenance of Facilities; Remodeling.  The
          Company shall at all times to cause the Facilities, and every
          element and unit thereof, to be maintained, preserved and kept in
          thorough repair, working order and condition and cause all
          needful and proper repairs and renewals thereto to be made;
          provided, however, that the Company may cause the operation of
          the Facilities, or any element or unit thereof, to be
          discontinued if, in the judgment of the Company, it is no longer
          advisable to operate the same, or if the Company intends to sell
          or dispose of the same and within a reasonable time shall
          endeavor to effectuate such sale or disposition.

               After the Completion Date, the Company may, subject to the
          provisions of Section 6.05 hereof, at its own expense remodel the
          Facilities or make such substitutions, modifications and
          improvements to the Facilities from time to time as it, in its
          discretion, may deem to be desirable for its uses and purposes,
          which remodeling, substitutions, modifications and improvements
          shall be included under the terms of this Agreement as part of
          the Facilities.

               SECTION 3.06  Insurance.  The Company shall keep the
          Facilities insured against fire and other risks to the extent
          usually insured against by companies owning and operating similar
          property, by reputable insurance companies or, at the Company's
          election, with respect to all or any element or unit of the
          Facilities, by means of an adequate insurance fund set aside and
          maintained by it out of its own earnings or in conjunction with
          other companies through an insurance fund, trust or other
          agreement or, by means of unfunded self-insurance as may be
          reasonable and customary by companies owning and operating
          similar property.  All proceeds of such insurance shall be for
          the account of the Company.

               SECTION 3.07  Condemnation.  The Company shall be entitled
          to the entire proceeds of any condemnation award or portion
          thereof made for damages to or takings of the Facilities or other
          property of the Company.

               SECTION 3.08  Termination of Construction.   (a)  Anything
          in this Agreement to the contrary notwithstanding, the Company
          shall have the right at any time to terminate the construction of
          the Facilities, in whole, if the Company shall have determined
          that the continued construction or operation of the Facilities,
          in whole, is impracticable, uneconomical or undesirable for any
          reason.

               (b)  Promptly after the termination of the construction of
          the Facilities, the Company shall submit to the Authority and the
          Trustee a certificate, executed by an Authorized Company
          Representative, which shall state the reasons for such
          termination and shall state that the Cost of Construction, to the
          extent of the construction of the Facilities as of the date of
          such termination, has been paid, except for any Costs of
          Construction which have been incurred but are not then due and
          payable, or the liability for the payment of which is being
          contested or disputed by the Company, and for the payment of
          which the Trustee is directed to retain specified amounts of
          moneys in specified accounts within the Construction Fund. 
          Notwithstanding the foregoing, such certificate may state that it
          is given without prejudice to any rights against third parties
          which exist at the date thereof or which may subsequently come
          into being.


                                      ARTICLE IV

              ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS
                                     OF THE BONDS

               SECTION 4.01  Issuance of the Bonds.  The Authority shall
          issue the Bonds under and in accordance with the Indenture,
          subject to the provisions of the bond purchase agreement among
          the Authority, the initial purchaser or purchasers of the Bonds
          and the Company.  The Company hereby approves the issuance of the
          Bonds and all terms and conditions thereof.

               SECTION 4.02  Issuance of Other Obligations.  The Authority
          and the Company expressly reserve the right to enter into, to the
          extent permitted by law, but shall not be obligated to enter
          into, an agreement or agreements other than this Agreement with
          respect to the issuance by the Authority, under an indenture or
          indentures other than the Indenture, of obligations to provide
          additional funds to pay the Cost of Construction of the
          Facilities or obligations to refund all or any principal amount
          of the Bonds, or any combination thereof.

               SECTION 4.03  The Loans; Disposition of Bond Proceeds.  The
          Authority and the Company shall enter into escrow arrangements
          with the trustee for the 1990 Bonds and shall cause $20,000,000
          of the proceeds of the Bonds to be deposited in escrow with such
          trustee to be applied to the payment of the 1990 Bonds upon the
          redemption thereof.  The Authority shall from time to time lend
          to the Company the remaining proceeds of the issuance and sale of
          the Bonds, other than accrued interest, if any, paid by the
          initial purchaser or purchasers thereof, for the purposes
          specified in this Agreement, such proceeds to be applied as
          hereinafter and in the Indenture provided.

               The Authority shall establish the Bond Fund and the
          Construction Fund with the Trustee in accordance with Sections
          4.01 and 5.01 of the Indenture.  The proceeds of the issuance and
          sale of the Bonds, other than the $20,000,000 deposited in escrow
          with the trustee for the 1990 Bonds as hereinabove provided and
          accrued interest, if any, paid by the initial purchaser or
          purchasers thereof, shall be deposited into the Construction
          Fund, and any such accrued interest shall be deposited into the
          Bond Fund, all in accordance with the provisions of the
          Indenture.

               The moneys on deposit in the Construction Fund shall be
          applied by the Trustee as provided in Section 4.04 hereof and as
          otherwise provided in Article V of the Indenture.  Until the
          moneys on deposit in the Construction Fund are so applied, such
          moneys shall be and remain the property of the Authority, subject
          to the lien of the Indenture, and the Company shall have no
          right, title or interest therein except as expressly provided in
          this Agreement and the Indenture.  However, in order to secure
          the payment by the Company of the Loan Payments, and the payment
          by the Authority of the principal of and premium, if any, and
          interest on the Bonds, and the performance and observance by the
          Company and the Authority of all covenants and conditions
          expressed herein and in the Indenture and contained in the Bonds,
          the Company hereby mortgages, pledges, assigns, creates and
          grants a security interest in and confirms to the Trustee such
          right, title and interest as the Company may be deemed to have or
          hereafter acquire in the proceeds of the issuance and sale of the
          Bonds to be deposited into the Construction Fund and the proceeds
          from the investment and reinvestment thereof, upon terms and
          conditions co-extensive with those set forth in the Indenture
          with respect to the lien and security interest of the Trustee in
          the Trust Estate (as defined in the Indenture).

               SECTION 4.04  Disbursements from Construction Fund.  (a)  To
          the extent that moneys on deposit in the Construction Fund shall
          not otherwise have been applied in accordance with the provisions
          of Article V of the Indenture, such moneys shall be loaned to the
          Company from time to time to reimburse the Company for portions
          of the Cost of Construction paid by it or to make payments to
          persons designated by the Company in respect of portions of the
          Cost of Construction, upon receipt by the Trustee of requisitions
          executed by, or communications by telegram, telex or facsimile
          transmission from, an Authorized Company Representative, which
          requisitions or communications shall state with respect to each
          payment to be made: (i) the requisition number, (ii) the name and
          address of the person, firm or corporation to whom payment is due
          or has been made (or, in the case of payments to the Bond Fund,
          instructions to make such payments thereto), (iii) the amount
          paid or to be paid, (iv) the account or accounts within the
          Construction Fund from which payment of such requisition, or any
          portion thereof, shall be made, (v) (A) that each obligation,
          item of cost or expense with respect to which such requisition is
          being made has been properly incurred and has been paid or is
          then due and payable as an item of the Cost of Construction, is a
          proper charge against the Construction Fund, and has not been the
          basis of any previous final payment therefrom or from the
          proceeds of any other obligations issued by the Authority or (B)
          in the event that a portion of the Bonds shall have been paid,
          redeemed or deemed to have been paid within the meaning of
          Article VIII of the Indenture by reason of the application of the
          proceeds of the sale of any obligations issued under an indenture
          other than the Indenture and if the payment of such requisition
          is to be made into the construction, acquisition or other similar
          fund created under such other indenture, that upon disbursement
          from such construction, acquisition or other similar fund, each
          obligation, item of cost or expense mentioned in the requisition
          for such disbursement will have been properly incurred and will
          have been paid or will then be due and payable as an item of the
          Cost of Construction, will be a proper charge against the
          construction, acquisition or other similar fund under such
          indenture, and will not have been the basis of any previous final
          payment therefrom or from the proceeds of any other revenue bonds
          issued by the Authority, (vi) that the payment of such
          requisition will not result in a breach of any of the covenants
          of the Company contained in subsection (c) or (d) of this Section
          4.04 and (vii) that, to the best of the knowledge of such
          Authorized Company Representative, there shall not have occurred
          and be continuing any Event of Default described in Section 8.01
          hereof.  Any such communication by telegram, telex or facsimile
          transmission shall be promptly confirmed by a requisition
          executed by an Authorized Company Representative.  The Company
          shall furnish to the Authority a copy of each requisition
          delivered to the Trustee promptly upon request therefor.

               (b)  In paying any requisition under this Section 4.04, the
          Trustee shall be entitled to conclusively rely as to the
          completeness and accuracy of all statements in such requisition
          upon the approval of such requisition by an Authorized Company
          Representative, execution thereof to be conclusive evidence of
          such approval, and the Company shall indemnify and save harmless
          the Authority and the Trustee from any liability incurred in
          connection with any requisition so executed by an Authorized
          Company Representative.

               (c)  The Company shall submit requisitions for Costs of
          Construction in compliance with the requirements therefor
          contained in the Tax Agreement, which on a cumulative aggregate
          basis, if paid, would result in less than 97% of the sum of the
          total amount of the proceeds of the Bonds expended, for any
          purpose, being used to provide facilities for the local
          furnishing of electric energy or other exempt facilities,
          including facilities functionally related or subordinate thereto,
          within the meaning of Section 142 of the Code; provided, however,
          that the moneys paid from the Investment Account within the
          Construction Fund shall be disregarded for purposes of the
          foregoing covenant and all computations made in accordance
          therewith if the Company shall have furnished to the Authority
          and the Trustee an opinion of Bond Counsel to the effect that
          such moneys may be so disregarded without impairing the exclusion
          from gross income for federal tax purposes of interest on the
          Bonds.

                    (d)  The Company shall not submit or cause to be
          submitted to the Trustee any requisition pursuant to this Section
          4.04, and shall have no claim upon any moneys in the Construction
          Fund, so long as there shall have occurred and be continuing any
          Event of Default described in Section 8.01 hereof.

               SECTION 4.05  Investment of Moneys in Funds and Accounts.
          The Company and the Authority agree that any moneys held in any
          fund or account created by the Indenture shall be invested as
          provided in the Indenture.

                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS

               SECTION 5.01  Loan Payments.  In consideration of the
          issuance of the Bonds and the disposition of the proceeds thereof
          as contemplated in Section 4.03 hereof, the Company shall pay, or
          cause to be paid, to the Trustee for the account of the Authority
          an amount equal to the aggregate principal amount of the Bonds
          from time to time Outstanding and, as interest on its obligation
          to pay such amount, an amount equal to premium, if any, and
          interest on such Bonds, such amounts to be paid in installments
          due on the dates, in the amounts and in the manner provided in
          the Indenture for the Authority to cause amounts to be deposited
          in the Bond Fund for the payment of the principal of and premium,
          if any, and interest on the Bonds whether at stated maturity,
          upon redemption or acceleration or otherwise; provided, however,
          that the obligation of the Company to make any such payment
          hereunder shall be reduced by the amount of any reduction under
          the Indenture of the amount of the corresponding payment required
          to be made by the Authority thereunder.

               SECTION 5.02  Payments Assigned; Obligation Absolute.  It is
          understood and agreed that all Loan Payments are, by the
          Indenture, to be pledged by the Authority to the Trustee, and
          that all rights and interest of the Authority hereunder (except
          for the Authority's rights under Sections 5.03, 5.04, 6.03 and
          8.05 hereof and any rights of the Authority to receive notices,
          certificates, requests, requisitions and other communications
          hereunder) are to be pledged and assigned to the Trustee.  The
          Company assents to such pledge and assignment and agrees that the
          obligation of the Company to make the Loan Payments shall be
          absolute, irrevocable and unconditional and shall not be subject
          to cancellation, termination or abatement, or to any defense
          other than payment or to any right of set-off, counterclaim or
          recoupment arising out of any breach by the Authority or the
          Trustee or any other party under this Agreement, the Indenture or
          otherwise, or out of any obligation or liability at any time
          owing to the Company by the Authority, the Trustee or any other
          party, and, further, that the Loan Payments and the other
          payments due hereunder shall continue to be payable at the times
          and in the amounts herein and therein specified, whether or not
          the Facilities, or any portion thereof, shall have been completed
          or shall have been destroyed by fire or other casualty, or title
          thereto, or the use thereof, shall have been taken by the
          exercise of the power of eminent domain, and that there shall be
          no abatement of or diminution in any such payments by reason
          thereof, whether or not the Facilities shall be used or useful,
          whether or not any applicable laws, regulations or standards
          shall prevent or prohibit the use of the Facilities, or for any
          other reason, all of the foregoing being subject, however, to the
          provisions of Sections 6.01 and 7.01 hereof.

               SECTION 5.03  Payment of Expenses.  The Company shall pay,
          or, to the extent permitted by this Agreement, cause to be paid
          out of the Construction Fund, all Administration Expenses,
          including, without limitation, Administration Expenses incurred
          at and subsequent to the time the Bonds are deemed to have been
          paid in accordance with Article VIII of the Indenture.  The
          payment of the compensation and the reimbursement of expenses and
          advances of the Trustee, of the paying agent, any co-paying agent
          and the registrar under the Indenture shall be made directly to
          such entities.

               SECTION 5.04  Indemnification.  The Company releases the
          Authority, the Trustee and their directors, officers, employees
          and agents from, agrees that the Authority and the Trustee shall
          not be liable for, and agrees to indemnify and hold the
          Authority, the Trustee and their directors, officers, employees
          and agents free and harmless from, any liability (including,
          without limitation, attorneys' and other agents' fees and
          expenses) for any loss or damage to property or any injury to or
          death of any person that may be occasioned by any cause
          whatsoever pertaining to the Facilities, except (i) in the case
          of the Trustee, as a result of the negligence or bad faith or
          willful misconduct of the Trustee or its directors, officers,
          employees and agents;  and (ii) in the case of the Authority, as
          a result of the gross negligence or bad faith of the Authority or
          its directors, officers, employees and agents.

               The Company shall indemnify and hold the Authority and the
          Trustee, free and harmless from any loss, claim, damage, tax,
          penalty, liability, disbursement, litigation expenses, attorneys'
          and other agents' fees and expenses or court costs arising out
          of, or in any way relating to, the execution or performance of
          this Agreement, the issuance or sale of the Bonds, actions taken
          under the Indenture or any other cause whatsoever pertaining to
          the Facilities, except (i) in the case of the Trustee, as a
          result of the negligence or bad faith or willful misconduct of
          the Trustee;  and (ii) in the case of the Authority, as a result
          of the gross negligence or bad faith of the Authority.

               The Company shall indemnify and hold the Authority and its
          directors, officers, employees and agents free and harmless from
          any loss, claim, damage, tax, penalty, liability, disbursement,
          litigation expenses, attorney's fees and expenses or court costs
          arising out of or in any way relating to 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 material utilized in connection with the sale of any
          Bonds.

               SECTION 5.05  Payment of Taxes; Discharge of Liens.  The
          Company shall: (a) pay, or make provision for payment of, all
          lawful taxes and assessments, including income, profits, property
          or excise taxes, if any, or other municipal or governmental
          charges, levied or assessed by any federal, state or municipal
          government or political body upon the Facilities or any part
          thereof or upon the Authority with respect to the Loan Payments,
          when the same shall become due; and (b) pay or cause to be
          satisfied and discharged or make adequate provision to satisfy
          and discharge, within sixty (60) days after the same shall
          accrue, any lien or charge upon the Loan Payments, and all lawful
          claims or demands for labor, materials, supplies or other charges
          which, if unpaid, might be or become a lien upon such amounts;
          provided, that, if the Company shall first notify the Authority
          and the Trustee of its intention so to do, the Company may in
          good faith contest any such lien or charge or claims or demands
          in appropriate legal proceedings, and in such event may permit
          the items so contested and identified as such by the Company to
          remain undischarged and unsatisfied during the period of such
          contest and any appeal therefrom, unless the Trustee shall notify
          the Company in writing that, in the opinion of counsel to the
          Trustee based upon material facts disclosed to the Trustee
          without any duty of investigation, by nonpayment of any such
          items the lien of the Indenture as to the Loan Payments will be
          materially endangered, in which event the Company shall promptly
          pay and cause to be satisfied and discharged all such unpaid
          items.  The Authority shall cooperate fully with the Company in
          any such contest.


                                      ARTICLE VI

                                  SPECIAL COVENANTS

               SECTION 6.01  Maintenance of Corporate Existence.  Except as
          permitted in this Section 6.01, the Company shall maintain its
          corporate existence, shall not sell, transfer or otherwise
          dispose of all of its assets, as or substantially as an entirety,
          and shall not consolidate with or merge with or into another
          corporation.  The Company may consolidate with or merge into
          another corporation incorporated under the laws of the United
          States of America, any state thereof or the District of Columbia,
          or sell, transfer or otherwise dispose of all of its assets, as
          or substantially as an entirety, to any Person, if the surviving
          or resulting corporation (if other than the Company) or the
          transferee Person, as the case may be, prior to or simultaneously
          with such merger, consolidation, sale, transfer or disposition,
          assumes, by delivery to the Trustee and the Authority of an
          instrument in writing satisfactory in form to the Trustee, all
          the obligations of the Company under this Agreement, including,
          without limitation, obligations of the Company under Section 5.01
          hereof. Upon such an assumption following any such sale, transfer
          or other disposition of assets, the Company shall be released and
          discharged from all liability in respect of all obligations under
          this Agreement.  Notwithstanding the foregoing, in the case of
          any such sale, transfer or other disposition of assets, which do
          not include the Facilities, the Company shall remain liable in
          respect of obligations under this Agreement other than the
          obligations under Section 5.01 hereof, and the transferee shall
          not be required to assume any obligations hereunder other than
          the obligations under Section 5.01 hereof; provided, however,
          that the transferee shall be required to assume all such other
          obligations unless the Company shall have delivered to the
          Authority and the Trustee an opinion of Bond Counsel to the
          effect that the non-assumption by the transferee of such other
          obligations will not impair the validity under the Act of the
          Bonds and will not adversely affect the exclusion from gross
          income for federal tax purposes of interest on the Bonds.

               If consolidation, merger or sale, transfer or other
          disposition is made as permitted by this Section 6.01, the
          provisions of this Section 6.01 shall continue in full force and
          effect and no further consolidation, merger or sale or other
          transfer shall be made except in compliance with the provisions
          of this Section 6.01.

               Anything in this Agreement to the contrary notwithstanding,
          the sale, transfer or other disposition by the Company of all of
          its facilities (a) for the generation of electric energy, (b) for
          the transmission of electric energy or (c) for the distribution
          of electric energy, in each case considered alone, or all of its
          facilities described in clauses (a) and (b), considered together,
          or all of its facilities described in clauses (b) and (c),
          considered together, shall in no event be deemed to constitute a
          sale, transfer or other disposition of all the properties of the
          Company, as or substantially as an entirety, unless, immediately
          following such sale, transfer or other disposition, the Company
          shall own no properties in the other such categories of property
          not so sold, transferred or otherwise disposed of.  The character
          of particular facilities shall be determined by reference to the
          Uniform System of Accounts prescribed for public utilities and
          licensees subject to the Federal Power Act, as amended, to the
          extent applicable.

               SECTION 6.02  Permits or Licenses.  In the event that it may
          be necessary for the proper performance of this Agreement on the
          part of the Company or the Authority that any application or
          applications for any permit or license to do or to perform
          certain things be made to any governmental or other agency by the
          Company or the Authority, the Company and the Authority each
          shall, upon the request of either, execute such application or
          applications.

               SECTION 6.03  Authority's Access to Facilities.  The
          Authority shall have the right, upon appropriate prior notice to
          the Company, to have reasonable access to the Facilities during
          normal business hours for the purpose of making examinations and
          inspections of the same.

               SECTION 6.04  Tax-Exempt Status of Interest on Bonds.  (a) 
          It is the intention of the parties hereto that interest on the
          Bonds shall be and remain tax-exempt, and to that end the
          covenants and agreements of the Authority and the Company in this
          Section 6.04 and the Tax Agreement are for the benefit of the
          Owners from time to time of the Bonds.

                    (b)  Each of the Company and the Authority covenants
          and agrees for the benefit of the Owners from time to time of the
          Bonds that it will not directly or indirectly use or permit the
          use of (to the extent within its control) the proceeds of any of
          the Bonds or any other funds, or take or omit to take any action,
          if and to the extent such use, or the taking or omission to take
          such action, would cause any of the Bonds to be "arbitrage bonds"
          within the meaning of Section 148 of the Code or otherwise
          subject to federal income taxation by reason of Section 103 and
          141 through 150 of the Code and any applicable regulations
          promulgated thereunder.  To such ends, the Authority and the
          Company shall comply with all requirements of such Section 148 to
          the extent applicable to the Bonds.  In the event that at any
          time the Authority or the Company is of the opinion that for
          purposes of this Section 6.04(b) it is necessary to restrict or
          limit the yield on the investment of any moneys held by the
          Trustee under the Indenture, the Authority or the Company shall
          so notify the Trustee in writing.

                    Without limiting the generality of the foregoing, the
          Company and the Authority agree that there shall be paid from
          time to time all amounts required to be rebated to the United
          States of America pursuant to Section 148(f) of the Code and any
          applicable Treasury Regulations.  This covenant shall survive
          payment in full or defeasance of the Bonds and the satisfaction
          and discharge of the Indenture.  The Company specifically
          covenants to pay or cause to be paid, the Rebate Requirement as
          defined and described in the Tax Agreement.

                    (c)  The Authority certifies and represents that it has
          not taken, and the Authority covenants and agrees that it will
          not take, any action which results in interest paid on the Bonds
          being included in gross income of the Owners of the Bonds for
          federal tax purposes pursuant to Sections 103 and 141 of the Code
          and any regulations thereunder; and the Company certifies and
          represents that it has not taken or (to the extent within its
          control) permitted to be taken, and the Company covenants and
          agrees that it will not take or (to the extent within its
          control) 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, however, that neither the
          Company nor the Authority shall be deemed to have violated these
          covenants 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; and provided, further, that none of
          the covenants and agreements herein contained shall require
          either the Company or the Authority 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 7.08 of the Indenture and agrees
          to perform all duties imposed on it by such Section 7.08, by this
          Section and by the Tax Agreement.  Insofar as Section 7.08 of the
          Indenture and the Tax Agreement impose duties and
          responsibilities on the Company, they are specifically
          incorporated herein by reference.

                    (d)  Notwithstanding any provision of this Section 6.04
          and Section 7.08 of the Indenture, if the Company shall provide
          to the Authority and the Trustee an opinion of Bond Counsel to
          the effect that any specified action required under this Section
          6.04 and Section 7.08 of the Indenture is no longer required or
          that some further or different action is required to maintain the
          tax-exempt status of interest on the Bonds, the Company, the
          Trustee and the Authority may conclusively rely upon such opinion
          in complying with the requirements of this Section 6.04, and the
          covenants hereunder shall be deemed to be modified to that
          extent.

               SECTION 6.05  Use of Facilities.  So long as any Bonds are
          Outstanding and the Facilities are operated by or for the benefit
          of the Company, the Company shall cause the Facilities to be used
          for purposes contemplated by the Act and in the Tax Agreement.

               SECTION 6.06  Financing Statements.  The Company shall file
          and record, or cause to be filed and recorded, all financing
          statements and continuation statements referred to in Section
          7.07 of the Indenture.


                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING

               SECTION 7.01  Conditions. The Company's interest in this
          Agreement may be assigned as a whole or in part, and its interest
          in the Facilities may be leased, sold, transferred or otherwise
          disposed of by the Company as a whole or in part (whether an
          interest in a specific element or unit or an undivided interest),
          to any Person; provided, however, that no such assignment, lease,
          sale, transfer or other disposition (a) shall relieve the Company
          from its primary liability for its obligations under Section 5.01
          hereof or (b) shall be made unless the assignee, lessee,
          purchaser or other transferee, as the case may be, prior to or
          simultaneously with such assignment, lease, sale, transfer or
          other disposition, assumes, by delivery of an instrument in
          writing satisfactory in form to the Trustee and the Authority,
          all other obligations of the Company hereunder to the extent of
          the interest assigned, leased, sold, transferred or otherwise
          disposed of, and the Company shall be released of and discharged
          from such obligations to the extent so assumed.  Notwithstanding
          the foregoing, (a) if (i) the Company's interest in this
          Agreement shall be assigned as a whole or in undivided part, (ii)
          the Company's interest in the Facilities shall be leased as a
          whole or in undivided part and the term of such leasehold or the
          term of any extension or extensions thereof at the option of the
          Company shall extend beyond the maturity date of the Bonds or
          (iii) the Company's interest in the Facilities shall be sold,
          transferred or otherwise disposed of as a whole or in undivided
          part, and (b) in the event that the assignee, lessee, purchaser
          or other transferee shall assume the obligations of the Company
          under Section 5.01 hereof for the remaining term of this
          Agreement, to the extent of such assignment, lease, sale,
          transfer or other disposition, the Company shall be released from
          and discharged of all liability in respect of such obligations to
          the extent so assumed (but only to such extent); provided,
          however, that the release and discharge of the Company pursuant
          to clause (b) shall be conditioned upon the delivery by the
          Company to the Authority and the Trustee of a certificate of an
          Independent Expert (as hereinafter defined) describing the
          interests so assigned, leased, sold, transferred or otherwise
          disposed of, together with all other rights, interests, assets
          and/or properties assigned, leased, sold, transferred or
          otherwise disposed of by the Company to the same Person in the
          same or a related transaction, stating that such rights,
          interests, assets and/or properties so described constitute
          facilities for the generation, transmission  and/or distribution
          of electric energy and stating that, in the opinion of such
          Independent Expert, the Fair Value (as hereinafter defined) of
          such rights, interests, assets and/or properties to the Person
          acquiring the same is not less than an amount equal to 10/7 of
          the sum of (x) the aggregate principal amount of the Bonds then
          Outstanding and (y) the outstanding principal amount of all other
          obligations of the Company representing indebtedness for borrowed
          money or for the deferred purchase price of property which are
          being assumed by such Person; provided, further, that after any
          such assumption, release and discharge as aforesaid, the Company
          may again assume such obligations under Section 5.01 hereof, in
          whole or in part, at any time and from time to time, and, to the
          extent of any such assumption by the Company (but only to such
          extent), the aforesaid assignee, lessee, purchaser or other
          transferee shall be released from and discharged of all liability
          in respect of such obligations.

               Anything herein to the contrary notwithstanding, the Company
          shall not make any assignment, lease or sale as provided in the
          immediately preceding paragraph unless it shall have furnished to
          the Authority and the Trustee an opinion of Bond Counsel to the
          effect that the proposed assignment, lease or sale will not
          impair the validity under the Act of the Bonds and will not
          adversely affect the exclusion of interest on the Bonds from
          gross income for federal tax purposes.

               After any lease, sale, transfer or other disposition of any
          element or unit of the Facilities, or any interest therein, the
          Company may, at its option, cause such element or unit, or
          interest therein, to no longer be deemed to be part of the
          Facilities for the purposes of this Agreement by delivering to
          the Authority and the Trustee the agreements or other documents
          required pursuant to Section 7.02 hereof together with an
          instrument signed by an Authorized Company Representative stating
          that such element or unit, or interest therein, shall no longer
          be deemed to be part of the Facilities for the purposes of this
          Agreement.

               For purposes of this Section 7.01:

                    (a)  "Independent Expert" means a Person which (i) is
               an engineer, appraiser or other expert and which, with
               respect to any certificate to be delivered pursuant to this
               Section, is qualified to pass upon the matter set forth in
               such certificate and (ii)(A) is in fact independent, (B)
               does not have any direct material financial interest in the
               transferee or in any obligor upon the Bonds or under this
               Agreement or in any affiliate of the transferee or any such
               obligor, (C) is not connected with the transferee or any
               such obligor as an officer, employee, promoter, underwriter,
               trustee, partner, director or any person performing similar
               functions and (D) is approved by the Trustee in the exercise
               of reasonable care; for purposes of this definition
               "engineer" means a Person engaged in the engineering
               profession or otherwise qualified to pass upon engineering
               matters (including, but not limited to, a Person licensed as
               a professional engineer, whether or not then engaged in the
               engineering profession); and for purposes of this definition
               "appraiser" means a Person engaged in the business of
               appraising property or otherwise qualified to pass upon the
               Fair Value or fair market value of property.

                    (b)  "Fair Value" means the fair value of the
               interests, rights, assets and/or properties assigned,
               leased, sold, transferred or otherwise disposed of (but, in
               the case of a lease, only to the extent of such lease) as
               may be determined by reference to (i) except in the case of
               a lease, the amount which would be likely to be obtained in
               an arm's-length transaction with respect to such interests,
               rights, assets and/or properties between an informed and
               willing buyer and an informed and willing seller, under no
               compulsion, respectively, to buy or sell, (ii) in the case
               of a lease, the amount (discounted to present value at a
               rate not lower than the taxable equivalent of the yield to
               maturity of the Bonds based on prevailing market prices
               immediately prior to the first public announcement of the
               proposed transaction) which would be likely to be obtained
               in an arm's-length transaction with respect to such
               interests, rights, assets and/or properties between an
               informed and willing lessee and an informed and willing
               lessor, neither under any compulsion to lease; (iii) the
               amount of investment with respect to such interests, rights,
               assets and/or properties which, together with a reasonable
               return thereon, would be likely to be recovered through
               ordinary business operations or otherwise, (iv) the cost,
               accumulated depreciation and replacement cost with respect
               to such interests, rights, assets and/or properties and/or
               (v) any other relevant factors; provided, however, that (x)
               Fair Value shall be determined without deduction for any
               mortgage, deed of trust, pledge, security interest,
               encumbrance, lease, reservation, restriction, servitude,
               charge or similar right or any other lien of any kind and
               (y) the Fair Value to the transferee of any property shall
               not reflect any reduction relating to the fact that such
               property may be of less value to a Person which is not the
               owner, lessee or operator of the property or any portion
               thereof than to a Person which is such owner, lessee or
               operator.  Fair Value may be determined, without physical
               inspection, by the use of accounting and engineering records
               and other data maintained by the Company or the transferee
               or otherwise available to the Independent Expert certifying
               the same.

               SECTION 7.02  Instrument Furnished to the Authority and
          Trustee.  The Company shall, within fifteen (15) days after the
          delivery thereof, furnish to the Authority and the Trustee a true
          and complete copy of the agreements or other documents
          effectuating any such assignment, lease, sale, transfer or other
          disposition.

               SECTION 7.03  Limitation.  This Agreement shall not be
          assigned nor shall the Facilities be leased, sold, transferred or
          otherwise disposed of, in whole or in part, except as provided in
          this Article VII or in Section 6.01 or 5.02 hereof.  This Article
          VII shall not apply to any sale, transfer or other disposition by
          the Company of all of its assets, as or substantially as an
          entirety, as contemplated in Section 6.01.


                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES

               SECTION 8.01  Events of Default.  Each of the following
          events shall constitute and is referred to in this Agreement as
          an "Event of Default":

                    (a)  a failure by the Company to make any Loan Payment,
               which failure shall have resulted in an "Event of Default"
               under clause (a) or (b) of Section 9.01 of the Indenture;

                    (b)  a failure by the Company to pay when due any
               amount required to be paid under this Agreement or to
               observe and perform any covenant, condition or agreement on
               its part to be observed or performed (other than a failure
               described in clause (a) above), which failure shall continue
               for a period of sixty (60) days after written notice,
               specifying such failure and requesting that it be remedied,
               shall have been given to the Company by the Authority or the
               Trustee, unless the Authority and the Trustee shall agree in
               writing to an extension of such period prior to its
               expiration; provided, however, that the Authority and the
               Trustee shall be deemed to have agreed to an extension of
               such period if corrective action is initiated by the Company
               within such period and is being diligently pursued; or

                    (c)  the dissolution or liquidation of the Company, or
               failure by the Company promptly to lift any execution,
               garnishment or attachment of such consequence as will impair
               its ability to make any payments under this Agreement, or
               the entry of an order for relief by a court of competent
               jurisdiction in any proceeding for its liquidation or
               reorganization under the provisions of any bankruptcy act or
               under any similar act which may be hereafter enacted, or an
               assignment by the Company for the benefit of its creditors,
               or the entry by the Company into an agreement of composition
               with its creditors (the term "dissolution or liquidation of
               the Company," as used in this clause, shall not be construed
               to include the cessation of the corporate existence of the
               Company resulting either from a merger or consolidation of
               the Company into or with another corporation or a
               dissolution or liquidation of the Company following a
               transfer of all or substantially all its assets as an
               entirety, under the conditions permitting such actions
               contained in Section 6.01 hereof).

               SECTION 8.02  Force Majeure.  The provisions of Section 8.01
          hereof are subject to the following limitations: if by reason of
          acts of God; 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 Arizona, or any department,
          agency, political subdivision, court or official of any of them,
          or any civil or military authority; insurrections; riots;
          epidemics; landslides; lightning; earthquakes; volcanoes; fires;
          hurricanes; tornadoes; storms; floods; washouts; droughts;
          arrests; restraint of government and people; civil disturbances;
          explosions; breakage or accident to machinery; partial or entire
          failure of utilities; or any cause or event not reasonably within
          the control of the Company, the Company is unable in whole or in
          part to carry out any one or more of its agreements or
          obligations contained herein, other than its obligations under
          Sections 5.01, 5.03, 5.05 and 6.01 hereof, the Company shall not
          be deemed in default by reason of not carrying out said agreement
          or agreements or performing said obligation or obligations during
          the continuance of such inability.  The Company shall make
          reasonable effort to remedy with all reasonable dispatch the
          cause or causes preventing it from carrying out its agreements;
          provided, 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.

               SECTION 8.03  Remedies.  (a)  Upon the occurrence and
          continuance of any Event of Default described in clause (a) of
          Section 8.01 hereof, and further upon the condition that, in
          accordance with the terms of the Indenture, the Bonds shall have
          been declared to be immediately due and payable pursuant to any
          provision of the Indenture, the Loan Payments shall, without
          further action, become and be immediately due and payable.

               Any waiver of any "Event of Default" under the Indenture and
          a rescission and annulment of its consequences shall constitute a
          waiver of the corresponding Event or Events of Default under this
          Agreement and a rescission and annulment of the consequences
          thereof.

               (b)  Upon the occurrence and continuance of any Event of
          Default, the Authority, or the Trustee with respect to the rights
          of the Authority assigned to the Trustee by the Indenture, may
          take any action at law or in equity to collect any payments then
          due and thereafter to become due, or to enforce performance and
          observance of any obligation, agreement or covenant of the
          Company hereunder.

               (c)  Any amounts collected by the Trustee from the Company
          pursuant to this Section 8.03 shall be applied in accordance with
          the Indenture.

               SECTION 8.04  No Remedy Exclusive.  No remedy conferred upon
          or reserved to the Authority hereby 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 hereunder 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 or power may be exercised from time to time and as
          often as may be deemed expedient.  In order to entitle the
          Authority to exercise any remedy reserved to it in this Article
          VIII, it shall not be necessary to give any notice, other than
          such notice as may be herein expressly required.

               SECTION 8.05  Reimbursement of Attorneys' and Agents' Fees. 
          If the Company shall default under any of the provisions hereof
          and the Authority or the Trustee shall employ attorneys or agents
          or incur other reasonable expenses for the collection of payments
          due hereunder or for the enforcement of performance or observance
          of any obligation or agreement on the part of the Company
          contained herein, the Company will on demand therefor reimburse
          the Authority or the Trustee and any predecessor Trustee, as the
          case may be, for the reasonable fees of such attorneys and such
          other reasonable expenses so incurred.

               SECTION 8.06  Waiver of Breach.  In the event any obligation
          created hereby shall be breached by either of the parties and
          such breach shall thereafter be waived by the other party, such
          waiver shall be limited to the particular breach so waived and
          shall not be deemed to waive any other breach hereunder.  In view
          of the assignment of certain of the Authority's rights and
          interest hereunder to the Trustee, the Authority shall have no
          power to waive any breach hereunder by the Company in respect of
          such rights and interest without the consent of the Trustee, and
          the Trustee may exercise any of such rights of the Authority
          hereunder.


                                      ARTICLE IX

                                 REDEMPTION OF BONDS

               SECTION 9.01  Redemption of Bonds.  The Authority shall
          take, or cause to be taken, the actions required by the Indenture
          to discharge the lien created thereby through the redemption, or
          provision for payment or redemption, of all Bonds then
          Outstanding, or to effect the redemption, or provision for
          payment or redemption, of less than all the Bonds then
          Outstanding, upon receipt by the Authority and the Trustee from
          the Company of a notice designating the principal amount of the
          Bonds to be redeemed, or for the payment or redemption of which
          provision is to be made, and, in the case of redemption of Bonds,
          or provision therefor, specifying the date of redemption and the
          applicable redemption provision of the Indenture.  Such
          redemption date shall not be less than 45 days from the date such
          notice is given (unless a shorter notice is satisfactory to the
          Trustee).  Unless otherwise stated therein, such notice shall be
          revocable by the Company at any time prior to the time at which
          the Bonds to be redeemed, or for the payment or redemption of
          which provision is to be made, are first deemed to be paid in
          accordance with Article VIII of the Indenture.  The Company shall
          furnish any moneys or Government Obligations (as defined in the
          Indenture) required by the Indenture to be deposited with the
          Trustee or otherwise paid by the Authority in connection with any
          of the foregoing purposes.

               SECTION 9.02  Compliance with the Indenture.  Anything in
          this Agreement to the contrary notwithstanding, the Authority and
          the Company shall take all actions required by this Agreement and
          the Indenture in order to comply with any provisions of the
          Indenture requiring the mandatory redemption of Bonds.


                                      ARTICLE X

                                    MISCELLANEOUS

               SECTION 10.01  Term of Agreement.  This Agreement shall
          remain in full force and effect from the date hereof until the
          right, title and interest of the Trustee in and to the Trust
          Estate (as defined in the Indenture) shall have ceased,
          terminated and become void in accordance with Article VIII of the
          Indenture and until all payments required under this Agreement
          shall have been made.  Notwithstanding the foregoing, the
          covenants contained in Section 5.03, 5.04, Section 6.04 and 8.05
          hereof shall survive the termination of this Agreement.

               SECTION 10.02  Notices.  Except as otherwise provided in
          this Agreement, all notices, certificates, requests, requisitions
          and other communications hereunder shall be in writing and shall
          be sufficiently given and shall be deemed given when mailed by
          registered mail, postage prepaid, addressed as follows: if to the
          Authority, c/o Russo, Cox & Russo, P.C., 1820 East River Road,
          Suite 230, Tucson, Arizona 85718; if to the Company, at 220 West
          Sixth Street, Tucson, Arizona 85702, Attention: Treasurer; and if
          to the Trustee, at such address as shall be designated by it in
          the Indenture.  A copy of each notice, certificate, request or
          other communication given hereunder to the Authority, the
          Company, or the Trustee shall also be given to the others.  The
          Authority, the Company, and the Trustee may, by notice given
          hereunder, designate any further or different addresses to which
          subsequent notices, certificates, requests or other
          communications shall be sent.

               SECTION 10.03  Parties in Interest.  This Agreement shall
          inure to the benefit of and shall be binding upon the Authority,
          the Company and their respective successors and assigns, and no
          other person, firm or corporation shall have any right, remedy or
          claim under or by reason of this Agreement; provided, however,
          that the lien and security interest granted to the Trustee in
          Section 4.03 hereof, as well as the rights and remedies granted
          to the Authority in Article VIII hereof, shall inure to the
          benefit of the Trustee, on behalf of the Owners from time to time
          of the Bonds, and shall be enforceable by the Trustee as a third
          party beneficiary or as assignee of the Authority; and provided,
          further, that neither Pima County, Arizona nor the State of
          Arizona shall in any event be liable for the payment of the
          principal of or premium, if any, or interest on the Bonds or for
          the performance of any pledge, mortgage, obligation or agreement
          created by or arising out of this Agreement or the issuance of
          the Bonds, and further that neither the Bonds nor any such
          obligation or agreement of the Authority shall be construed to
          constitute an indebtedness of Pima County, Arizona or the State
          of Arizona within the meaning of any constitutional or statutory
          provisions whatsoever, but shall be limited obligations of the
          Authority payable solely out of the revenues derived from this
          Agreement, or from the sale of the Bonds, or from the investment
          or reinvestment of any of the foregoing, as provided herein and
          in the Indenture.

               SECTION 10.04  Amendments.  This Agreement may be amended
          only by written agreement of the parties hereto, subject to the
          limitations set forth herein and in the Indenture.

               SECTION 10.05  Counterparts.  This Agreement may be executed
          in any number of counterparts, each of which, when so executed
          and delivered, shall be an original; but such counterparts shall
          together constitute but one and the same Agreement.

               SECTION 10.06  Severability.  If any clause, provision or
          section of this Agreement shall, for any reason, be held illegal
          or invalid by any court, the illegality or invalidity of such
          clause, provision or section shall not affect any of the
          remaining clauses, provisions or sections hereof, and this
          Agreement shall be construed and enforced as if such illegal or
          invalid clause, provision or section had not been contained
          herein.  In case any agreement or obligation contained in this
          Agreement be held to be in violation of law, then such agreement
          or obligation shall be deemed to be the agreement or obligation
          of the Authority or the Company, as the case may be, to the full
          extent permitted by law.

               SECTION 10.07  Governing Law.  The laws of the State of
          Arizona shall govern the construction and enforcement of this
          Agreement, except that the provisions of Section 13.09 of the
          Indenture, construed as provided in Section 13.07 of the
          Indenture, shall apply to this Agreement as if contained herein.

               SECTION 10.08  Notice Regarding Cancellation of Contracts. 
          As required by the provisions of Section 38-511, Arizona Revised
          Statutes, as amended, notice is hereby given that political
          subdivisions of the State of Arizona or any of their departments
          or agencies may, within three (3) years of its execution, cancel
          any contract, without penalty or further obligation, made by the
          political subdivisions or any of their departments or agencies on
          or after September 30, 1988, if any person significantly involved
          in initiating, negotiating, securing, drafting or creating the
          contract on behalf of the political subdivisions or any of their
          departments or agencies is, at any time while the contract or any
          extension of the contract is in effect, an employee or agent of
          any other party to the contract in any capacity or a consultant
          to any other party of the contract with respect to the subject
          matter of the contract.  The cancellation shall be effective when
          written notice from the chief executive officer or governing body
          of the political subdivision is received by all other parties to
          the contract unless the notice specifies a later time.

               The Company covenants and agrees not to employ as an
          employee, agent or, with respect to the subject matter of this
          Agreement, a consultant, any person significantly involved in
          initiating, negotiating, securing, drafting or creating such
          Agreement on behalf of the Authority within three (3) years from
          the execution hereof, unless a waiver is provided by the
          Authority.


          <PAGE>


               IN WITNESS WHEREOF, the parties hereto have caused this Loan
          Agreement to be duly executed as of the day and year first above
          written.


                                   THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                     OF THE COUNTY OF PIMA



                                   By:  /s/ Stanley Lehman
                                      ----------------------------------
                                        President



                                   TUCSON ELECTRIC POWER COMPANY


                                   By:  /s/ Kevin Larson
                                      -----------------------------------
                                        Vice President

          <PAGE>


                                                                  EXHIBIT A

               A portion of the costs of the construction, improvement or
          equipping of the following Facilities will be financed or
          refinanced with the proceeds of the Industrial Development
          Revenue Bonds, 1997 Series A (Tucson Electric Power Company
          Project) issued by The Industrial Development Authority of the
          County of Pima and referred to in the foregoing Loan Agreement.

                                    _____________


               Certain additions and improvements to the Company's lower
          voltage electric transmission and distribution system of the City
          of Tucson and environs in Pima County and to Fort Huachuca in
          adjacent Cochise County, Arizona and additions and improvements
          to the Irvington Generating Station located in the City of
          Tucson, more particularly described in the Tax Certificate and
          Agreement, dated as of October 1, 1997, between The Industrial
          Development Authority of the County of Pima and Tucson Electric
          Power Company.




                                                               Exhibit 4b
          =================================================================




                                  INDENTURE OF TRUST
                                   (1997 SERIES A)


                                       BETWEEN



                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA



                                         AND



                    FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION




                                     ------------




                            DATED AS OF SEPTEMBER 15, 1997




                                     ------------



                                     AUTHORIZING

                        INDUSTRIAL DEVELOPMENT REVENUE BONDS,
                                    1997 SERIES A
                       (TUCSON ELECTRIC POWER COMPANY PROJECT)


          =================================================================

     <PAGE>

                                TABLE OF CONTENTS*


                                                                       Page
                                                                       ----

             Parties  . . . . . . . . . . . . . . . . . . . . . . . . .   1
             Recitals . . . . . . . . . . . . . . . . . . . . . . . . .   1
             Granting Clause  . . . . . . . . . . . . . . . . . . . . .   2


                                      ARTICLE I

                                     DEFINITIONS

          Section 1.01.  Definitions. . . . . . . . . . . . . . . . . .   2

                                      ARTICLE II

                                      THE BONDS

          Section 2.01.  Creation of Bonds. . . . . . . . . . . . . . .   9
          Section 2.02.  Form of Bonds. . . . . . . . . . . . . . . . .   9
          Section 2.03.  Execution of Bonds.  . . . . . . . . . . . . .  10
          Section 2.04.  Authentication of Bonds. . . . . . . . . . . .  10
          Section 2.05.  Bonds Not General Obligations. . . . . . . . .  10
          Section 2.06.  Prerequisites to Authentication of Bonds.  . .  10
          Section 2.07.  Lost or Destroyed Bonds or Bonds Canceled
                           in Error . . . . . . . . . . . . . . . . . .  11
          Section 2.08.  Transfer, Registration and Exchange of Bonds .  11
          Section 2.09.  Other Obligations  . . . . . . . . . . . . . .  13
          Section 2.10   Temporary Bonds. . . . . . . . . . . . . . . .  13
          Section 2.11.  Cancellation of Bonds  . . . . . . . . . . . .  13
          Section 2.12.  Payment of Principal and Interest  . . . . . .  13
          Section 2.13.  Applicability of Book-Entry Provisions . . . .  14

                                     ARTICLE III

                                 REDEMPTION OF BONDS

          Section 3.01.  Redemption Provisions  . . . . . . . . . . . .  14
          Section 3.02.  Selection of Bonds to be Redeemed  . . . . . .  15
          Section 3.03.  Procedure for Redemption . . . . . . . . . . .  16
          Section 3.04.  Payment of Redemption Price  . . . . . . . . .  16
          Section 3.05.  No Partial Redemption After Default  . . . . .  17

                                      ARTICLE IV

                                    THE BOND FUND


      -------------------

      *  This table of contents is not a part of the Indenture, and is for 
         convenience only.  The captions herein are of no legal effect and 
         do not vary the meaning or legal effect of any part of the 
         Indenture.

     <PAGE>

          Section 4.01.  Creation of Bond Fund  . . . . . . . . . . . .  17
          Section 4.02.  Liens  . . . . . . . . . . . . . . . . . . . .  17
          Section 4.03.  Deposits into Bond Fund  . . . . . . . . . . .  17
          Section 4.04.  Use of Moneys in Bond Fund . . . . . . . . . .  18
          Section 4.05.  Custody of Bond Fund; Withdrawal of Moneys . .  18
          Section 4.06.  Bonds Not Presented for Payment  . . . . . . .  18
          Section 4.07.  Moneys Held in Trust . . . . . . . . . . . . .  19

                                      ARTICLE V

                                THE CONSTRUCTION FUND

          Section 5.01.  Creation of, and Disbursements from,
                           Construction Fund  . . . . . . . . . . . . .  19
          Section 5.02.  Completion of Facilities; Termination
                           of Construction. . . . . . . . . . . . . . .  20
          Section 5.03.  Redemption of All Outstanding Bonds  . . . . .  21
          Section 5.04.  Acceleration of Bonds  . . . . . . . . . . . .  21
          Section 5.05.  Refunding of Bonds . . . . . . . . . . . . . .  21
          Section 5.06.  Moneys Held in Trust . . . . . . . . . . . . .  22

                                      ARTICLE VI

                                     INVESTMENTS

          Section 6.01.  Investments  . . . . . . . . . . . . . . . . .  22

                                     ARTICLE VII

                                  GENERAL COVENANTS

          Section 7.01.  No General Obligations . . . . . . . . . . . .  23
          Section 7.02.  Performance of Covenants of the Authority;
                           Representations  . . . . . . . . . . . . . .  23
          Section 7.03.  Maintenance of Rights and Powers; Compliance
                           with Laws  . . . . . . . . . . . . . . . . .  23
          Section 7.04.  Enforcement of Obligations of the Company;
                           Amendments . . . . . . . . . . . . . . . . .  23
          Section 7.05.  Further Instruments. . . . . . . . . . . . . .  23
          Section 7.06.  No Disposition of Trust Estate.  . . . . . . .  24
          Section 7.07.  Financing Statements.    . . . . . . . . . . .  24
          Section 7.08.  Tax Covenants; Rebate Fund.  . . . . . . . . .  24
          Section 7.09.  Notices of Trustee.  . . . . . . . . . . . . .  25

                                     ARTICLE VIII

                                      DEFEASANCE

          Section 8.01.  Defeasance.  . . . . . . . . . . . . . . . . .  25

                                      ARTICLE IX

                                DEFAULTS AND REMEDIES

          Section 9.01.  Events of Default. . . . . . . . . . . . . . .  26
          Section 9.02.  Remedies.  . . . . . . . . . . . . . . . . . .  27
          Section 9.03.  Restoration to Former Position.  . . . . . . .  27
          Section 9.04.  Owners' Right to Direct Proceedings. . . . . .  28
          Section 9.05.  Limitation on Owners' Right to
                           Institute Proceedings. . . . . . . . . . . .  28
          Section 9.06.  No Impairment of Right to Enforce Payment. . .  28
          Section 9.07.  Proceedings by Trustee without Possession
                           of Bonds.  . . . . . . . . . . . . . . . . .  28
          Section 9.08.  No Remedy Exclusive. . . . . . . . . . . . . .  28
          Section 9.09.  No Waiver of Remedies. . . . . . . . . . . . .  29
          Section 9.10.  Application of Moneys. . . . . . . . . . . . .  29
          Section 9.11.  Severability of Remedies.  . . . . . . . . . .  29

                                      ARTICLE X

                TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

          Section 10.01. Acceptance of Trusts.  . . . . . . . . . . . .  30
          Section 10.02. No Responsibility for Recitals.  . . . . . . .  30
          Section 10.03. Limitations on Liability.  . . . . . . . . . .  30
          Section 10.04. Compensation, Expenses and Advances. . . . . .  30
          Section 10.05. Notice of Events of Default. . . . . . . . . .  31
          Section 10.06. Action by Trustee. . . . . . . . . . . . . . .  31
          Section 10.07. Good Faith Reliance. . . . . . . . . . . . . .  31
          Section 10.08. Dealings in Bonds and with the Authority
                           and the Company. . . . . . . . . . . . . . .  31
          Section 10.09. Allowance of Interest. . . . . . . . . . . . .  32
          Section 10.10. Construction of Indenture. . . . . . . . . . .  32
          Section 10.11. Resignation of Trustee.  . . . . . . . . . . .  32
          Section 10.12. Removal of Trustee.  . . . . . . . . . . . . .  32
          Section 10.13. Appointment of Successor Trustee.  . . . . . .  32
          Section 10.14. Qualifications of Successor Trustee. . . . . .  33
          Section 10.15. Judicial Appointment of Successor Trustee. . .  33
          Section 10.16. Acceptance of Trusts by Successor Trustee. . .  33
          Section 10.17. Successor by Merger or Consolidation.  . . . .  33
          Section 10.18. Standard of Care.  . . . . . . . . . . . . . .  34
          Section 10.19. Notice to Owners of Bonds of Event of Default.  34
          Section 10.20. Intervention in Litigation of the Authority. .  34
          Section 10.21. Paying Agent; Co-Paying Agents.  . . . . . . .  34
          Section 10.22. Qualifications of Paying Agent and
                           Co-Paying Agents; Resignation; Removal.  . .  35
          Section 10.23. Registrar. . . . . . . . . . . . . . . . . . .  35
          Section 10.24. Qualifications of Registrar; Resignation;
                           Removal. . . . . . . . . . . . . . . . . . .  36
          Section 10.25. Several Capacities.  . . . . . . . . . . . . .  36

                                      ARTICLE XI

                   EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                             PROOF OF OWNERSHIP OF BONDS

          Section 11.01. Execution of Instruments; Proof of Ownership.   36
  
                                      ARTICLE XII

                MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

          Section 12.01. Limitations. . . . . . . . . . . . . . . . . .  37
          Section 12.02. Supplemental Indentures without Owner Consent.  37
          Section 12.03. Supplemental Indentures with Consent of 
                           Owners . . . . . . . . . . . . . . . . . . .  38
          Section 12.04. Effect of Supplemental Indenture.  . . . . . .  39
          Section 12.05. Consent of the Company.  . . . . . . . . . . .  39
          Section 12.06. Amendment of Loan Agreement without Consent
                           of Owners. . . . . . . . . . . . . . . . . .  39
          Section 12.07. Amendment of Loan Agreement with Consent
                           of Owners. . . . . . . . . . . . . . . . . .  39

                                     ARTICLE XIII

                                    MISCELLANEOUS

          Section 13.01. Successors of the Authority. . . . . . . . . .  40
          Section 13.02. Parties in Interest. . . . . . . . . . . . . .  40
          Section 13.03. Severability.  . . . . . . . . . . . . . . . .  40
          Section 13.04. No Personal Liability of Authority Officials.   40
          Section 13.05. Bonds Owned by the Authority or the Company. .  40
          Section 13.06. Counterparts.  . . . . . . . . . . . . . . . .  41
          Section 13.07. Governing Law. . . . . . . . . . . . . . . . .  41
          Section 13.08. Notices. . . . . . . . . . . . . . . . . . . .  41
          Section 13.09. Holidays.  . . . . . . . . . . . . . . . . . .  41
          Section 13.10. Statutory Notice Regarding Cancellation
                           of Contracts.    . . . . . . . . . . . . . .  41


          Testimonium . . . . . . . . . . . . . . . . . . . . . . . .    43
          Signatures and Seals  . . . . . . . . . . . . . . . . . . .    43

          Exhibit A - Form of Bond  . . . . . . . . . . . . . . . . . . A-1
          Exhibit B - Form of Endorsement of Transfer . . . . . . . . . B-1
          Exhibit C - Form of Certificate of Authentication . . . . . . C-1


     <PAGE>


                                  INDENTURE OF TRUST

             THIS INDENTURE OF TRUST (1997 A Series), dated as of September
          15, 1997 (this "Indenture"), between THE INDUSTRIAL DEVELOPMENT
          AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona (hereinafter called the "Authority"), and First Trust of
          New York, National Association, as trustee (hereinafter called
          the "Trustee"),

                                W I T N E S S E T H :


             WHEREAS, the Authority is authorized and empowered under Title
          35, Chapter 5, Arizona Revised Statutes, as amended (the "Act"),
          to issue its bonds in accordance with the Act and to make secured
          or unsecured loans for the purpose of financing or refinancing
          the acquisition, construction, improvement or equipping of
          projects consisting of land, any building or other improvement,
          and all real and personal properties, including but not limited
          to machinery and equipment, whether or not now in existence or
          under construction, whether located within or without Pima
          County, which shall be suitable for, among other things,
          facilities for the furnishing of electric energy, gas or water,
          air and water pollution control facilities and sewage and solid
          waste disposal facilities, and to charge and collect interest on
          such loans and pledge the proceeds of loan agreements as security
          for the payment of the principal of and interest on bonds, or
          designated issues of bonds, issued by the Authority and any
          agreements made in connection therewith, whenever the Board of
          Directors of the Authority finds such loans to be in furtherance
          of the purposes of the Authority or in the public interest;

             WHEREAS, the Authority has heretofore issued and sold
          $20,000,000 aggregate principal amount of its Industrial
          Development Revenue Bonds, 1990 Series A (Tucson Electric Power
          Company Project), all of which remain outstanding (the "1990
          Bonds"), the proceeds of which were loaned to Tucson Electric
          Power Company, an Arizona corporation (the "Company"), for the
          purpose of financing a portion of the costs of the acquisition,
          construction, improvement and equipping of certain of its
          facilities for the furnishing of electric energy (the
          "Facilities"); and

             WHEREAS, the Authority proposes to issue and sell its revenue
          bonds as provided herein (the "Bonds") for the purpose of
          financing a portion of the costs of the acquisition,
          construction, improvement and equipping certain additional items
          of the Facilities and for the purpose of refinancing, by the
          payment or redemption of the 1990 Bonds, or provision therefor,
          the portion of the costs of the acquisition, construction,
          improvement and equipping of the Facilities previously financed
          with the proceeds of the 1990 Bonds, all as described in Exhibit
          A to the Loan Agreement, dated as of September 15, 1997 (the
          "Loan Agreement"), between the Authority and the Company;

             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 Owners (as hereinafter defined)
          thereof and of the sum of one dollar lawful money of the United
          States of America, to it duly paid by the Trustee at or before
          the execution and delivery of these presents, and for other good
          and valuable consideration the receipt and sufficiency of which
          are 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 Authority of all the covenants and
          conditions expressed or implied herein and contained in the
          Bonds, the Authority does hereby grant, bargain, sell, convey,
          mortgage, pledge and assign, and grant a security interest in,
          the Trust Estate (as hereinafter defined) to the Trustee, its
          successors in trust and their assigns forever;

             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, first, for the equal and proportionate benefit and
          security of all Owners of the Bonds issued under and secured by
          this Indenture without preference, priority or distinction as to
          the 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
          VIII hereof, the principal of and premium, if any, and interest
          on the Bonds shall have been paid to the Owners thereof, or shall
          have been paid to the Company pursuant to Section 4.06 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 Authority and the Company such instruments in
          writing as shall be requisite to evidence the discharge hereof;
          otherwise this Indenture is 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 as hereinafter expressed, and the Authority has agreed
          and covenanted, and does hereby agree and covenant, with the
          Trustee and with the respective Owners, from time to time, of the
          Bonds, as follows:


                                      ARTICLE I

                                     DEFINITIONS

             Section 1.01.  Definitions.  The terms defined in this Article
          I shall, for all purposes of this Indenture, have the meanings
          herein specified, unless the context clearly requires otherwise:

          Act:

             "Act" shall mean Title 35, Chapter 5, Arizona Revised
          Statutes, and all acts supplemental thereto or amendatory
          thereof.

          Administration Expenses:

             "Administration Expenses" shall mean the reasonable expenses
          incurred by the Authority with respect to the Loan Agreement,
          this Indenture and any transaction or event contemplated by the
          Loan Agreement or this Indenture, including the compensation and
          reimbursement of expenses and advances payable to the Trustee, to
          the Paying Agent, any Co-Paying Agent and the Registrar and a pro
          rata share of the Authority's annual operating expenses in
          accordance with the provisions of paragraph XII.D. of the
          Authority's Procedural Pamphlet.

          Authority

             "Authority" shall mean The Industrial Development Authority of
          the County of Pima, an Arizona nonprofit corporation designated
          by law as a political subdivision of the State of Arizona
          incorporated for and with the approval of Pima County, Arizona,
          pursuant to the provisions of the Constitution of the State of
          Arizona and the Act, its successors and their assigns.

          Authorized Company Representative:

             "Authorized Company Representative" shall mean each person at
          the time designated to act on behalf of the Company by written
          certificate furnished to the Authority and the Trustee containing
          the specimen signature of such person and signed on behalf of the
          Company by its President, any Vice President or its Treasurer,
          together with its Secretary or any Assistant Secretary.

          Bond Counsel:

             "Bond Counsel" shall mean any firm or firms of nationally
          recognized bond counsel experienced in matters pertaining to the
          validity of, and exclusion from gross income for federal tax
          purposes of interest on bonds issued by states and political
          subdivisions, selected by the Company and acceptable to the
          Authority.

          Bond Fund:

             "Bond Fund" shall mean the fund created by Section 4.01
          hereof.

          Bonds:

             "Bond" or "Bonds" shall mean the bonds authorized to be issued
          under this Indenture.

          Capital Account:

             "Capital Account" shall mean any of the accounts so named
          established under Sections 4.01 and 5.01 hereof.

          Code:

             "Code" shall mean the Internal Revenue Code of 1986 or any
          successor statute thereto.  Each reference to a section of the
          Code herein shall be deemed to include the United States Treasury
          Regulations proposed or in effect thereunder and applicable to
          the Bonds or the use of proceeds thereof, unless the context
          clearly requires otherwise.  References to any particular Code
          section shall, in the event of a successor Code, be deemed to be
          a reference to the successor to such Code section.

          Company:

             "Company" shall mean Tucson Electric Power Company, a
          corporation organized and existing under the laws of the State of
          Arizona, its successors and their assigns, including without
          limitation, any successor obligor under Section 6.01 or 7.01 of
          the Loan Agreement to the extent of the obligations assumed
          thereunder.

          Completion Date:

             "Completion Date" shall mean the date specified in Section
          3.04 of the Loan Agreement.

          Construction (and other forms of the word "construct"):

             "Construction" (and other forms of the word "construct") shall
          mean, when used with respect to the Facilities, the construction
          of the Facilities and shall include, without limitation, the
          acquisition, construction, improvement and equipping of the
          Facilities, all as contemplated by the Act.

          Construction Fund:

             "Construction Fund" shall mean the fund created by Section
          5.01 hereof.

          Cost of Construction:

             "Cost of Construction" shall embrace all costs paid or
          incurred by the Company with respect to the Facilities and the
          financing thereof for the payment of which the Authority is
          authorized to issue bonds under the Act, and shall include
          without limitation (a) obligations paid or incurred by the
          Company for labor, materials and other expenses and to
          contractors, builders and materialmen in connection with the
          construction of the Facilities; (b) the costs paid or incurred by
          the Company for contract bonds and for insurance of all kinds
          that may be deemed by the Company to be desirable or necessary
          during the course of construction of the Facilities; (c) the
          expenses paid or incurred by the Company for test borings,
          surveys, estimates, plans and specifications, and preliminary
          investigations therefor, with respect to the Facilities and for
          supervising construction, as well as for the performance of all
          other duties required by or reasonably necessary for the proper
          construction, of the Facilities; (d) Administration Expenses paid
          or incurred prior to the Completion Date and legal, accounting,
          financial, underwriting, advertising, recording and printing
          expenses and all other fees and expenses paid or incurred by the
          Company in connection with the issuance and sale of the Bonds;
          (e) amounts in respect of interest (exclusive of accrued interest
          paid by the initial purchasers upon delivery thereof) accruing
          upon the Bonds until the Completion Date; (f) all other costs
          that the Company shall be required to pay under the terms of any
          contract or contracts for the construction of the Facilities; (g)
          any other costs or expenses paid or incurred by the Company, and
          any sums required to reimburse the Company for work done by it,
          with respect to the Facilities which are properly chargeable to
          the capital account of the Company with respect to the Facilities
          or would be so chargeable for federal income tax purposes either
          with a proper election or but for a proper election to deduct the
          same; and (h) amounts required to be paid to the United States by
          the Company (on behalf of the Authority) in respect of the Bonds
          pursuant to Section 148 of the Code.  For purposes of the
          application of the proceeds of the Bonds, the Cost of
          Construction shall be deemed to include the payment or
          redemption, or provision therefor, of any obligations, other than
          the Bonds, issued to finance or refinance any of the costs listed
          above.  The Cost of Construction shall also be deemed to include
          all costs paid or incurred with respect to the Facilities by any
          Person (as defined in the Loan Agreement) to whom the Facilities
          have been leased or sold as a whole or in part, provided that
          such costs, had they been paid or incurred by the Company, would
          otherwise constitute a portion of the Cost of Construction.

          Depositary:

             "Depositary" shall mean The Depository Trust Company or any
          successor thereto as a securities repository for the Bonds.

          Facilities:

             "Facilities" shall mean the real and personal properties,
          machinery and equipment currently existing, under construction
          and to be constructed which are described in Exhibit A to the
          Loan Agreement, as revised from time to time to reflect any
          changes therein, additions thereto, substitutions therefor and
          deletions therefrom permitted by the terms of the Loan Agreement,
          subject, however, to the provisions of Section 7.01 of the Loan
          Agreement.

          General Account:

             "General Account" shall mean the account so named established
          under Section 4.01 hereof.

          Government Obligations:

             "Government Obligations" shall mean:

               (a) direct obligations of, or obligations the principal of
             and interest on which are unconditionally guaranteed by, the
             United States of America entitled to the benefit of the full
             faith and credit thereof; and

               (b) certificates, depositary receipts or other instruments
             which evidence a direct ownership interest in obligations
             described in clause (a) above or in any specific interest or
             principal payments due in respect thereof; provided, however,
             that the custodian of such obligations or specific interest or
             principal payments shall be a bank or trust company organized
             under the laws of the United States of America or of any state
             or territory thereof or of the District of Columbia, with a
             combined capital stock surplus and undivided profits of at
             least $50,000,000; and provided, further, that except as may
             be otherwise required by law, such custodian shall be
             obligated to pay to the holders of such certificates,
             depositary receipts or other instruments the full amount
             received by such custodian in respect of such obligations or
             specific payments and shall not be permitted to make any
             deduction therefrom.

          Indenture:

             "Indenture" shall mean this Indenture of Trust, dated as of
          September 15, 1997, between the Authority and the Trustee, and
          any and all modifications, alterations, amendments and
          supplements thereto.

          Investment Account:

             "Investment Account" shall mean any of the accounts so named
          established under Sections 4.01 and 5.01 hereof.

          Investment Securities:

             "Investment Securities" shall mean any of the following
          obligations or securities on which neither the Company nor any of
          its subsidiaries is the obligor: (a) Government Obligations; (b)
          interest bearing deposit accounts (which may be represented by
          certificates of deposit) in national, state or foreign banks
          having a combined capital and surplus of not less than
          $10,000,000; (c) bankers' acceptances drawn on and accepted by
          commercial banks having a combined capital and surplus of not
          less than $10,000,000; (d) (i) direct obligations of, (ii)
          obligations the principal of and interest on which are
          unconditionally guaranteed by, and (iii) any other obligations
          the interest on which is exempt from federal income taxation
          issued by, any state of the United States of America, the
          District of Columbia or the Commonwealth of Puerto Rico, or any
          political subdivision, agency, authority or other instrumentality
          of any of the foregoing, which, in any case, are rated by a
          nationally recognized rating agency in any of its three highest
          rating categories; (e) obligations of any agency or
          instrumentality of the United States of America; (f) commercial
          or finance company paper which is rated by a nationally
          recognized rating agency in any of its three highest rating
          categories; (g) corporate debt securities issued by corporations
          having debt securities rated by a nationally recognized rating
          agency in any of its three highest rating categories; (h)
          repurchase agreements with banking or financial institutions
          having a combined capital and surplus of not less than
          $10,000,000 with respect to any of the foregoing obligations or
          securities; (i) shares or interests in registered investment
          companies whose assets consist of obligations or securities which
          are described in any other clause of this sentence; and (j) any
          other obligations which may lawfully be purchased by the Trustee. 
          The commercial banks and banking institutions referred to above
          may include the entities acting as Trustee, Paying Agent,
          Co-Paying Agent and Registrar, hereunder if such entities shall
          otherwise satisfy the requirements set forth above.

          Loan Agreement:

             "Loan Agreement" shall mean the Loan Agreement, dated as of
          September 15, 1997, between the Authority and the Company
          relating to the Bonds, and any and all modifications,
          alterations, amendments and supplements thereto.

          Loan Payments:

             "Loan Payments" shall mean the payments required to be made by
          the Company pursuant to Section 5.01 of the Loan Agreement.

          1990 Bonds:

             "1990 Bonds" shall mean the $20,000,000 aggregate principal
          amount of the Authority's Industrial Development Revenue Bonds,
          1990 Series A (Tucson Electric Power Company Project).

          Notice by Mail:

             "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 Owners of
          specified registered Bonds at the addresses shown in the
          registration books maintained pursuant to Section 2.08 hereof;
          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, then such giving of notice in lieu thereof,
          which may include publication, as shall be made with the approval
          of the Trustee (or, if there be no trustee hereunder, the
          Authority) shall constitute a sufficient giving of such notice.

          Notice by Publication:

             "Notice by Publication" or "notice" of any action or condition
          "by Publication" shall mean publication of a notice meeting the
          requirements of this Indenture in a newspaper or financial
          journal of general circulation in The City of New York, New York,
          which carries financial news, is printed in the English language
          and is customarily published on each business day; provided,
          however, that any successive weekly publication of notice
          required hereunder may be made, unless otherwise expressly
          provided herein, on the same or different days of the week and in
          the same or different newspapers or financial journals; and
          provided, further, that if, because of the temporary or permanent
          suspension of the publication or general circulation of any
          newspaper or financial journal or for any other reason, it is
          impossible or impracticable to publish such notice in the manner
          herein described, then such publication in lieu thereof as shall
          be made with the approval of the Trustee (or, if there be no
          trustee hereunder, the Authority) shall constitute a sufficient
          publication of such notice.

          Outstanding:

             "Outstanding", when used in reference to the Bonds, shall
          mean, as at any particular date, the aggregate of all Bonds
          authenticated and delivered under this Indenture except:

               (a) those canceled by the Trustee at or prior to such date
             or delivered to or acquired by the Trustee at or prior to such
             date for cancellation;

               (b) those deemed to be paid in accordance with Article VIII
             hereof; and

               (c) those in lieu of or in exchange or substitution for
             which other Bonds shall have been authenticated and delivered
             pursuant to this Indenture, unless proof satisfactory to the
             Trustee and the Company is presented that such Bonds are held
             by a bona fide holder in due course.

          Owner:

             "Owner" shall mean the person in whose name any Bond is
          registered upon the registration books maintained pursuant to
          Section 2.08 hereof.  The Company may be an Owner.

          Paying Agent; Co-Paying Agent; Principal Office thereof:

             "Paying Agent" and "Co-Paying Agent" shall mean the paying
          agent and any co-paying agent appointed in accordance with
          Section 10.21 hereof.  "Principal Office" of the Paying Agent or
          any Co-Paying Agent shall mean the office thereof designated in
          writing to the Trustee.

          Rebate Fund:

             "Rebate Fund" shall mean the fund created by Section 7.08
          hereof.

          Receipts and Revenues of the Authority from the Loan Agreement:

             "Receipts and Revenues of the Authority from the Loan
          Agreement" shall mean all moneys paid or payable to the Trustee
          for the account of the Authority by the Company in respect of the
          Loan Payments and payments pursuant to Section 9.01 of the Loan
          Agreement, and all receipts of the Trustee which, under the
          provisions of this Indenture, reduce the amount of such payments.

          Record Date:

             "Record Date" shall mean the close of business on the
          fifteenth (15th) day of the calendar month immediately preceding
          each regularly scheduled interest payment date.

          Registrar; Principal Office thereof:

             "Registrar" shall mean the registrar appointed in accordance
          with Section 10.23 hereof.  "Principal Office" of the Registrar
          shall mean the office thereof designated in writing to the
          Trustee.

          Supplemental Indenture:

             "Supplemental Indenture" shall mean any indenture of the
          Authority modifying, altering, amending, supplementing or
          confirming this Indenture for any purpose, in accordance with the
          terms hereof.

          Supplemental Loan Agreement:

             "Supplemental Loan Agreement" shall mean any agreement between
          the Authority and the Company modifying, altering, amending or
          supplementing the Loan Agreement, in accordance with the terms
          thereof and hereof.

          Tax Agreement:

             "Tax Agreement" shall mean that tax certificate and agreement,
          dated the date of the initial authentication and delivery of the
          Bonds, between the Authority and the Company, relating to the
          requirements of the Code, and any and all modifications,
          alterations, amendments and supplements thereto.

          Trust Estate:

             "Trust Estate" shall mean at any particular time all right,
          title and interest of the Authority in and to the Loan Agreement
          (except its rights under Sections 5.03, 5.04, 6.03 and 8.05
          thereof and any rights of the Authority to receive notices,
          certificates, requests, requisitions and other communications
          thereunder), including without limitation, the Receipts and
          Revenues of the Authority from the Loan Agreement, the Bond Fund
          and the Construction Fund and all moneys and Investment
          Securities from time to time on deposit therein (excluding,
          however, any moneys or Investment Securities held in the Rebate
          Fund), any and all other moneys and obligations (other than
          Bonds) which at such time are deposited or are required to be
          deposited with, or are held or are required to be held by or on
          behalf of, the Trustee, the Paying Agent or any Co-Paying Agent
          in trust under any of the provisions of this Indenture and all
          other rights, titles and interests which at such time are subject
          to the lien of this Indenture; provided, however, that in no
          event shall there be included in the Trust Estate (a) moneys or
          obligations deposited with or held by the Trustee in the Rebate
          Fund pursuant to Section 7.08 hereof or (b) moneys or obligations
          deposited with or paid to the Trustee for the redemption or
          payment of Bonds which are deemed to have been paid in accordance
          with Article VIII hereof or moneys held pursuant to Section 4.06
          hereof.

          Trustee; Principal Office thereof:

             "Trustee" shall mean First Trust of New York, National
          Association, as trustee under this Indenture, its successors in
          trust and their assigns.  "Principal Office" of the Trustee shall
          mean the principal corporate trust office of the Trustee, which
          office at the date of acceptance by the Trustee of the duties and
          obligations imposed on the Trustee by this Indenture is located
          at the address specified in Section 13.08 hereof.


                                      ARTICLE II

                                      THE BONDS

             Section 2.01.  Creation of Bonds.  There is hereby authorized
          and created under this Indenture, for the purpose of providing
          moneys to pay a part of the Cost of Construction and for the
          purpose of refinancing the 1990 Bonds, an issue of Bonds,
          entitled to the benefit, protection and security of this
          Indenture, in the aggregate principal amount of Twenty-two
          Million Four Hundred Sixty Thousand Dollars ($22,460,000).  Each
          of the Bonds shall be designated by the title "The Industrial
          Development Authority of the County of Pima Industrial
          Development Revenue Bond, 1997 Series A (Tucson Electric Power
          Company Project)".  The Bonds shall mature, subject to prior
          redemption upon the terms and conditions hereinafter set forth,
          on September 1, 2025 and shall bear interest from the date
          thereof 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, at the rate of six and one-tenth per centum (6.10%)
          per annum, with interest thereon payable semi-annually on each
          March 1 and September 1, commencing March 1, 1998.  Interest
          shall be calculated on the basis of a 360-day year consisting of
          twelve 30-day months.

             Section 2.02.  Form of Bonds.  Bonds shall be authenticated
          and delivered hereunder solely as fully registered bonds without
          coupons in the denomination of $5,000 or integral multiples
          thereof.  Bonds shall be numbered as determined by the Trustee. 
          Bonds authenticated prior to the first interest payment date
          shall be dated September 15, 1997.  Bonds authenticated on or
          subsequent to the first interest payment date shall be dated the
          interest payment date next preceding the date of authentication
          thereof, unless such date of authentication shall be an interest
          payment date to which interest on the Bonds has been paid in full
          or duly provided for, in which case they shall be dated such date
          of authentication; 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 be dated the date to which interest
          has been paid in full on the Bonds surrendered.

             Principal of and premium, if any, on Bonds shall be payable to
          the Owners of such Bonds upon presentation and surrender of such
          Bonds at the Principal Office of the Paying Agent or any
          Co-Paying Agent.  Interest on the Bonds shall be paid by check
          drawn upon the Paying Agent and mailed to the Owners of such
          Bonds as of the close of business on the Record Date with respect
          to each interest payment date at the registered addresses of such
          Owners as they shall appear as of the close of business on such
          Record Date on the registration books maintained pursuant to
          Section 2.08 hereof notwithstanding the cancellation of any such
          Bond upon any exchange or registration of transfer subsequent to
          such Record Date, except that if and to the extent that there
          should be a default on the payment of interest on any Bond, such
          defaulted interest shall be paid to the Owners in whose name such
          Bond (or any Bond or Bonds issued upon any exchange or
          registration of transfer thereof) is registered as of the close
          of business on a date selected by the Trustee in its discretion,
          but not more than 15 days or less than 10 days prior to the date
          of payment of such defaulted interest; notwithstanding the
          foregoing, upon request to the Paying Agent by an Owner of not
          less than $1,000,000 in aggregate principal amount of Bonds,
          interest on such Bonds and, after presentation and surrender of
          such Bonds, the principal thereof shall be paid to such Owner by
          wire transfer to the account maintained within the continental
          United States specified by such Owner or, if such Owner maintains
          an account with the entity acting as Paying Agent, by deposit
          into such account.  Payment as aforesaid shall be made in such
          coin or currency of the United States of America as, at the
          respective times of payment, shall be legal tender for the
          payment of public and private debts.

             The Bonds and the form for registration of transfer and the
          form of certificate of authentication to be printed on the Bonds
          are to be in substantially the forms thereof set forth in
          Exhibits A, B and C hereto, respectively, with necessary or
          appropriate variations, omissions and insertions as permitted or
          required by this Indenture.

             Section 2.03.  Execution of Bonds.  The Bonds shall be
          executed on behalf of the Authority by the President or a Vice
          President of the Authority and shall have affixed, impressed or
          reproduced thereon the official seal of the Authority which shall
          be attested by the Secretary or an Assistant Secretary of the
          Authority.  Each of the foregoing officers may execute or cause
          to be executed with a facsimile signature in lieu of his manual
          signature the Bonds, provided the signature of either the
          President or a Vice President of the Authority or the Secretary
          or Assistant Secretary of the Authority shall, if required by
          applicable laws, be manually subscribed.

             In case any officer of the Authority whose signature or a
          facsimile of whose signature shall appear on the Bonds shall
          cease to be such officer before the authentication by the Trustee
          and delivery of such Bonds, such signature or such facsimile
          shall nevertheless be valid and sufficient for all purposes, the
          same as if such officer had remained in office until delivery;
          and any Bond may be signed on behalf of the Authority by such
          persons as, at the time of execution of such Bond, shall be the
          proper officers of the Authority, even though at the date of such
          Bond or of the execution and delivery of this Indenture any such
          person was not such officer.

             Section 2.04.  Authentication of Bonds.  Only such Bonds as
          shall have endorsed thereon a certificate of authentication
          substantially in the form set forth in Exhibit C hereto duly
          executed by the Trustee shall be entitled to any right or benefit
          under this Indenture.  No Bond shall be valid or obligatory for
          any purpose unless and until such certificate of authentication
          shall have been duly executed by the Trustee, and such executed
          certificate of authentication of the Trustee upon any such Bonds
          shall be conclusive evidence that such Bond has been
          authenticated and delivered under this Indenture.  The Trustee's
          certificate of authentication on any Bond shall be deemed to have
          been executed by it if signed with an authorized signature of the
          Trustee, but it shall not be necessary that the same person sign
          the certificate of authentication on all of the Bonds issued
          hereunder.  This Section 2.04 is subject to the provisions of
          Section 10.17 hereof.

             Section 2.05.  Bonds Not General Obligations.  Neither Pima
          County, Arizona nor the State of Arizona shall in any event be
          liable for the payment of the principal of or premium, if any, or
          interest on the Bonds, and neither the Bonds nor the premium, if
          any, or the interest thereon, shall be construed to constitute an
          indebtedness of Pima County, Arizona or the State of Arizona
          within the meaning of any constitutional or statutory provisions
          whatsoever.  The Bonds and the premium, if any, and the interest
          thereon shall be limited obligations of the Authority payable
          solely from the Receipts and Revenues of the Authority from the
          Loan Agreement and the other moneys pledged therefor under this
          Indenture, and such fact shall be plainly stated on the face of
          each Bond.

             Section 2.06.  Prerequisites to Authentication of Bonds.  The
          Authority shall execute and deliver to the Trustee and the
          Trustee shall authenticate the Bonds and deliver said Bonds to
          the initial purchasers thereof as may be directed hereinafter in
          this Section 2.06.

             Prior to the delivery on original issuance by the Trustee of
          any authenticated Bonds there shall be or have been delivered to
          the Trustee:

               (a) a duly certified copy of a resolution of the Board of
             Directors of the Authority authorizing the execution and
             delivery of this Indenture and the Loan Agreement and the
             issuance of the Bonds;

               (b) an original duly executed counterpart or a duly
             certified copy of the Loan Agreement;

               (c) a request and authorization to the Trustee on behalf of
             the Authority, signed by its President or a Vice President, to
             authenticate and deliver the Bonds in the aggregate principal
             amount determined by this Indenture to the purchaser or
             purchasers therein identified upon payment to the Trustee, but
             for the account of the Authority, of a sum specified in such
             request and authorization plus any accrued interest on such
             Bonds to the date of delivery; and

               (d) a written statement on behalf of the Company, executed
             by the President, any Vice President or the Treasurer, (i)
             approving the issuance and delivery of the Bonds and (ii)
             consenting to each and every provision of this Indenture.

             Section 2.07.  Lost or Destroyed Bonds or Bonds Canceled in
          Error.  If any Bond, whether in temporary or definitive form, is
          lost (whether by reason of theft or otherwise), destroyed
          (whether by mutilation, damage, in whole or in part, or
          otherwise) or canceled in error, the Authority may execute and
          the Trustee may authenticate a new Bond of like date and
          denomination and bearing a number not contemporaneously
          outstanding; provided that (a) in the case of any mutilated Bond,
          such mutilated Bond shall first be surrendered to the Trustee and
          (b) in the case of any lost Bond or Bond destroyed in whole,
          there shall be first furnished to the Authority, the Trustee and
          the Company evidence of such loss or destruction.  In every case,
          the applicant for a substitute Bond shall furnish the Authority,
          the Trustee and the Company such security or indemnity as may be
          required by any of them.  In the event any lost or destroyed Bond
          or a Bond canceled in error shall have matured or is about to
          mature, or has been called for redemption, instead of issuing a
          substitute Bond the Trustee may, in its discretion, pay the same
          without surrender thereof if there shall be first furnished to
          the Authority, the Trustee and the Company evidence of such loss,
          destruction or cancellation, together with indemnity,
          satisfactory to them.  Upon the issuance of any substitute Bond,
          the Authority and the Trustee may require the payment of a sum
          sufficient to cover any tax or other governmental charge that may
          be imposed in relation thereto.  The Trustee may charge the Owner
          of any such Bond with the Trustee's reasonable fees and expenses
          in connection with any transaction described in this Section
          2.07.

             Every substitute Bond issued pursuant to the provisions of
          this Section 2.07 by virtue of the fact that any Bond is lost,
          destroyed or canceled in error shall constitute an additional
          contractual obligation of the Authority, whether or not the Bond
          so lost, destroyed or canceled shall be at any time enforceable,
          and shall be entitled to all the benefits of this Indenture
          equally and proportionately with any and all other Bonds duly
          issued hereunder.  All Bonds shall be held and owned upon the
          express condition that, to the extent permitted by law, the
          foregoing provisions are exclusive with respect to the
          replacement or payment of lost, destroyed or improperly canceled
          Bonds, notwithstanding any law or statute now existing or
          hereafter enacted.

             Section 2.08.  Transfer, Registration and Exchange of Bonds. 
          The Registrar shall maintain and keep, at its Principal Office,
          books for the registration and registration of transfer of Bonds,
          which, at all reasonable times, shall be open for inspection by
          the Authority, the Trustee and the Company; and, upon
          presentation for such purpose of any Bond entitled to
          registration or registration of transfer at the Principal Office
          of the Registrar, the Registrar shall register or register the
          transfer in such books,  under such reasonable regulations as the
          Registrar may prescribe.  The Registrar shall make all necessary
          provisions to permit the exchange or registration of transfer of
          Bonds at its Principal Office.

             The transfer of any Bond shall be registered upon the
          registration books of the Registrar at the written request of the
          Owner thereof or his attorney duly authorized in writing, upon
          surrender thereof at the Principal Office of the Registrar,
          together with a written instrument of transfer satisfactory to
          the Registrar duly executed by the Owner or his duly authorized
          attorney.  Upon the registration of transfer of any such Bond or
          Bonds, the Authority shall issue in the name of the transferee,
          in authorized denominations, a new Bond or Bonds in the same
          aggregate principal amount as the surrendered Bond or Bonds.

             The Authority, the Trustee, the Paying Agent, any Co-Paying
          Agent and the Registrar may deem and treat the Owner of any Bond
          as the absolute owner of such Bond, whether such Bond shall be
          overdue or not, for the purpose of receiving payment of, or on
          account of, the principal of and premium, if any, and, except as
          provided in Section 2.02 hereof, interest on such Bond and for
          all other purposes, and neither the Authority, the Trustee, the
          Paying Agent, any Co-Paying Agent nor the Registrar shall be
          affected by any notice to the contrary.  All such payments so
          made to any such Owner or upon his order shall be valid and
          effective to satisfy and discharge the liability upon such Bond
          to the extent of the sum or sums so paid.

             Bonds, upon surrender thereof at the Principal Office of the
          Registrar may, at the option of the Owner thereof, be exchanged
          for an equal aggregate principal amount of Bonds of any
          authorized denomination.

             In all cases in which the privilege of exchanging Bonds or
          registering the transfer of Bonds is exercised, the Authority
          shall execute and the Trustee shall authenticate and deliver
          Bonds in accordance with the provisions of this Indenture.  For
          every such exchange or registration of transfer of Bonds, whether
          temporary or definitive, the Authority, the Registrar, or the
          Trustee may make a charge sufficient to reimburse it for any tax
          or other governmental charge required to be paid with respect to
          such exchange or registration of transfer, which sum or sums
          shall be paid by the person requesting such exchange or
          registration of transfer as a condition precedent to the exercise
          of the privilege of making such exchange or registration of
          transfer.  The Registrar shall not be obligated (a) to make any
          such exchange or registration of transfer of Bonds during the
          fifteen (15) days next preceding the date on which notice of any
          proposed redemption of Bonds is given or (b) to make any exchange
          or registration of transfer of any Bonds called for redemption.

             The Bonds are to be initially registered in the name of Cede &
          Co., as nominee for the Depositary.  Such Bonds shall not be
          transferable or exchangeable, nor shall any purported transfer be
          registered, except as follows:

               (a) such Bonds may be transferred in whole, and appropriate
             registration of transfer effected, if such transfer is by such
             nominee to the Depositary, or by the Depositary to another
             nominee thereof, or by any nominee of the Depositary to any
             other nominee thereof, or by the Depositary or any nominee
             thereof to any successor securities depositary or any nominee
             thereof; and

               (b) such Bond may be exchanged for definitive Bonds
             registered in the respective names of the beneficial holders
             thereof, and thereafter shall be transferable without
             restriction, if:

                  (i)  the Depositary shall have notified the Company and
               the Trustee that it is unwilling or unable to continue to
               act as securities depositary with respect to such Bonds and
               the Trustee shall not have been notified by the Company
               within ninety (90) days of the identity of a successor
               securities depositary with respect to such Bonds;

                  (ii)  the Company shall have delivered to the Trustee a
               written instrument to the effect that such Bonds shall be so
               exchangeable on and after a date specified therein; or

                  (iii)  (1) an Event of Default shall have occurred and be
               continuing, (2) the Trustee shall have given notice of such
               Event of Default pursuant to Section 10.19 hereof and (3)
               there shall have been delivered to the Authority, the
               Company and the Trustee an opinion of counsel to the effect
               that the interests of the beneficial owners of such Bonds in
               respect thereof will be materially impaired unless such
               owners become owners of definitive Bonds.

             The Bonds delivered to the Depositary may contain a legend
          reflecting the foregoing restrictions on registration of transfer
          and exchange.

             Section 2.09.  Other Obligations.  The Authority expressly
          reserves the right to issue, to the extent permitted by law, but
          shall not be obligated to issue, obligations under another
          indenture or indentures to provide additional funds to pay the
          Cost of Construction of the Facilities or to refund all or any
          principal amount of the Bonds, or any combination thereof.

             Section 2.10   Temporary Bonds.  Pending the preparation of
          definitive Bonds, the Authority may execute and the Trustee shall
          authenticate and deliver temporary Bonds.  Temporary Bonds shall
          be issuable as registered Bonds without coupons, of any
          authorized denomination, and substantially in the form of the
          definitive Bonds but with such omissions, insertions and
          variations as may be appropriate for temporary Bonds, all as may
          be determined by the Authority.  Temporary Bonds may contain such
          reference to any provisions of this Indenture as may be
          appropriate.  Every temporary Bond shall be executed by the
          Authority and be authenticated by the Trustee upon the same
          conditions and in substantially the same manner, and with like
          effect, as the definitive Bonds.  As promptly as practicable the
          Authority shall execute and shall furnish definitive Bonds and
          thereupon temporary Bonds may be surrendered in exchange therefor
          without charge at the Principal Office of the Trustee, and the
          Trustee shall authenticate and deliver in exchange for such
          temporary Bonds a like aggregate principal amount of definitive
          Bonds of authorized denominations.  Until so exchanged the
          temporary Bonds shall be entitled to the same benefits under this
          Indenture as definitive Bonds.

             Section 2.11.  Cancellation of Bonds.  All Bonds which shall
          have been surrendered to the Paying Agent or any Co-Paying Agent
          for payment or redemption, and all Bonds which shall have been
          surrendered to the Registrar for exchange or registration of
          transfer, shall be delivered to the Trustee for cancellation. 
          All Bonds delivered to or acquired by the Trustee for
          cancellation shall be canceled and destroyed by the Trustee.  The
          Trustee shall furnish to the Authority, the Paying Agent, the
          Registrar and the Company counterparts of certificates evidencing
          such cancellation and destruction and specifying such Bonds by
          number.

             Section 2.12.  Payment of Principal and Interest.  For the
          payment of interest on the Bonds, the Authority shall cause to be
          deposited in the Bond Fund, on each interest payment date, solely
          out of the Receipts and Revenues of the Authority from the Loan
          Agreement and other moneys pledged therefor, an amount sufficient
          to pay the interest to become due on such interest payment date. 
          The obligation of the Authority to cause any such deposit to be
          made hereunder shall be reduced by the amount of moneys in the
          Bond Fund available on such interest payment date for the payment
          of interest on the Bonds.

             For the payment of the principal of the Bonds upon maturity,
          the Authority shall cause to be deposited in the Bond Fund, on
          the stated or accelerated date of maturity, solely out of the
          Receipts and Revenues of the Authority from the Loan Agreement
          and other moneys pledged therefor, an amount sufficient to pay
          the principal of the Bonds.  The obligation of the Authority to
          cause any such deposit to be made hereunder shall be reduced by
          the amount of moneys in the Bond Fund available on the maturity
          date for the payment of the principal of the Bonds.

             Section 2.13.  Applicability of Book-Entry Provisions.
          Anything in this Indenture to the contrary notwithstanding, (a)
          the provisions of the Blanket Issuer Letter of Representations,
          dated February 26, 1996, between the Authority and The Depository
          Trust Company relating to the manner of and procedures for
          payment and redemption of Bonds and related matters shall apply
          so long as such Depositary shall be the Owner of all Outstanding
          Bonds and (b) the Authority, the Trustee or the Paying Agent, as
          applicable,  may enter into a similar agreement, on terms
          satisfactory to the Company, with any subsequent Depositary and
          the provisions thereof shall apply so long as such Depositary
          shall be the Owner of all Outstanding Bonds.

                                     ARTICLE III

                                 REDEMPTION OF BONDS

             Section 3.01.  Redemption Provisions.  (a)  The Bonds shall be
          subject to redemption by the Authority, at the direction of the
          Company, on any date on or after September 1, 2002 in whole at
          any time or in part from time to time, at the applicable
          redemption price (expressed as a percentage of principal amount)
          set forth below, plus accrued interest to the redemption date:

                  Redemption Period         Redemption Price
                  -----------------         ----------------
           September 1, 2002 through             102%
             August 31, 2003
           September 1, 2003 through             101%
             August 31, 2004
           September 1, 2004 and                 100%
             thereafter

               (b)  The Bonds shall be subject to redemption by the
             Authority, at the direction of the Company, in whole at any
             time at the principal amount thereof plus accrued interest to
             the redemption date, if:

                  (i)  the Company shall have determined that the continued
               operation of the Facilities is impracticable, uneconomical
               or undesirable for any reason;

                  (ii)  all or substantially all of the Facilities shall
               have been condemned or taken by eminent domain; or

                  (iii)  the operation of the Facilities shall have been
               enjoined or shall have otherwise been prohibited by, or
               shall conflict with, any order, decree, rule or regulation
               of any court or of any federal, state or local regulatory
               body, administrative agency or other governmental body.

               (c)  The Bonds shall be subject to mandatory redemption by
             the Authority, at the principal amount thereof plus accrued
             interest to the redemption date, on the 180th day (or such
             earlier date as may be designated by the Company) after a
             final determination by a court of competent jurisdiction or an
             administrative agency, to the effect that, as a result of a
             failure by the Company to perform or observe any covenant,
             agreement or representation contained in the Loan Agreement,
             the interest payable on the Bonds is included for federal
             income tax purposes in the gross income of the owners thereof,
             other than any owner of a Bond who is a "substantial user" of
             the Facilities or a "related person" within the meaning of
             Section 147(a) of the Code.  No determination by any court or
             administrative agency shall be considered final for the
             purposes of this Section 3.01 (c) unless the Company shall
             have been given timely notice of the proceeding which resulted
             in such determination and an opportunity to participate in
             such proceeding, either directly or through an owner of a
             Bond, and until the conclusion of any appellate review sought
             by any party to such proceeding or the expiration of the time
             for seeking such review. The Bonds shall be redeemed either in
             whole or in part in such principal amount that, in the opinion
             of Bond Counsel, the interest payable on the Bonds, including
             the Bonds remaining outstanding after such redemption, would
             not be included in the gross income of any owner thereof,
             other than an owner of a Bond who is a "substantial user" of
             the Facilities or a "related person" within the meaning of
             Section 147(a) of the Code.

               (d)  In the event that the aggregate of the amounts
             deposited pursuant to Section 5.02 hereof into the Capital
             Account and the Investment Account maintained within the Bond
             Fund, together with any income or other gain from the
             investment thereof, shall at any time, or from time to time,
             be equal to or greater than $5,000, but only to the extent
             that such amounts are required under Section 4.04(b) hereof to
             be applied to the redemption of Bonds, the Authority shall
             redeem Bonds, at the principal amount thereof plus accrued
             interest to the redemption date, in the largest aggregate
             principal amount which does not exceed the amount of such
             deposit or deposits, together with such income or gain, on the
             next interest payment date on which a redemption may be made
             in accordance with the provisions of Section 3.03(a) or (b)
             hereof and on which Bonds, in such amount, are otherwise
             redeemable at the principal amount thereof under subsection
             (a) or (b) of this Section 3.01.

             Section 3.02.  Selection of Bonds to be Redeemed.  If less
          than all the Bonds shall be called for redemption under any
          provision of this Indenture permitting such partial redemption,
          the particular Bonds or portions of Bonds to be redeemed shall be
          selected by the Trustee, in such manner as the Trustee in its
          discretion may deem proper, in the aggregate principal amount
          designated to the Trustee by the Company or otherwise as required
          by this Indenture; provided, however, that if, as indicated in a
          certificate of an Authorized Company Representative delivered to
          the Trustee, the Company shall have offered to purchase all Bonds
          then Outstanding and less than all such Bonds have been tendered
          to the Company for such purchase, the Trustee, at the direction
          of an Authorized Company Representative, shall select for
          redemption all such Bonds which shall not have been so tendered;
          and provided, further, that the portion of any Bond to be
          redeemed shall be in the principal amount of $5,000 or some
          integral multiple thereof and that, in selecting Bonds for
          redemption, the Trustee shall treat each Bond as representing
          that number of Bonds which is obtained by dividing the principal
          amount of such Bond by $5,000.  If it is determined that one or
          more, but not all, of the $5,000 units of principal amount
          represented by any such Bond is to be called for redemption,
          then, upon notice of intention to redeem such $5,000 unit or
          units, the Owner of such Bond shall forthwith surrender such Bond
          to the Paying Agent or any Co-Paying Agent for (y) payment to
          such Owner of the redemption price (including the redemption
          premium, if any, and accrued interest to the date fixed for
          redemption) of the $5,000 unit or units of principal amount
          called for redemption and (z) delivery to such Owner of a new
          Bond or Bonds in the aggregate principal amount of the unredeemed
          balance of the principal amount of any such Bond.  Bonds
          representing the unredeemed balance of the principal amount of
          any such Bond shall be delivered to the Owner thereof, without
          charge therefor.  If the Owner of any such Bond of a denomination
          greater than $5,000 shall fail to present such Bond to the Paying
          Agent or any Co-Paying Agent for payment and exchange as
          aforesaid, such Bond shall, nevertheless, become due and payable
          on the date fixed for redemption to the extent of the $5,000 unit
          or units of principal amount called for redemption (and to that
          extent only).

             Section 3.03.  Procedure for Redemption.  (a) In the event any
          of the Bonds are called for redemption, the Trustee shall give
          notice, in the name of the Authority, of the redemption of such
          Bonds, which notice shall (i) specify the Bonds to be redeemed,
          the redemption date, the redemption price, and the place or
          places where amounts due upon such redemption will be payable
          (which shall be the Principal Office of the Paying Agent or any
          Co-Paying Agent) and, if less than all of the Bonds are to be
          redeemed, the numbers of the Bonds to be redeemed, and the
          portion of the principal amount of any Bond to be redeemed in
          part, (ii) state any condition to such redemption and (iii) state
          that on the redemption date, and upon the satisfaction of any
          such condition, the Bonds or portions thereof to be redeemed
          shall cease to bear interest.  Such notice may set forth any
          additional information relating to such redemption.  Such notice
          shall be given by Mail at least thirty (30) days prior to the
          date fixed for redemption to the Owners of the Bonds to be
          redeemed; provided, however, that failure duly to give such
          Notice by Mail, or any defect therein, shall not affect the
          validity of any proceedings for the redemption of Bonds as to
          which there shall have been no such failure or defect.  If a
          notice of redemption shall be unconditional, or if the conditions
          of a conditional notice or redemption shall have been satisfied,
          then upon presentation and surrender of Bonds so called for
          redemption at the place or places of payment, such Bonds shall be
          redeemed.  The Trustee shall promptly deliver to the Company a
          copy of each such notice of redemption.

               (b) With respect to any notice of redemption of Bonds in
             accordance with subsection (a) or (b) of Section 3.01 hereof,
             unless, upon the giving of such notice, such Bonds shall be
             deemed to have been paid within the meaning of Article VIII
             hereof, such notice shall state that such redemption shall be
             conditional upon the receipt, by the Trustee at or prior to
             the opening of business on the date fixed for such redemption,
             of moneys sufficient to pay the principal of and premium, if
             any, and interest on such Bonds to be redeemed, and that if
             such moneys shall not have been so received said notice shall
             be of no force and effect and the Authority shall not be
             required to redeem such Bonds.  In the event that such notice
             of redemption contains such a condition and such moneys are
             not so received, the redemption shall not be made and the
             Trustee shall within a reasonable time thereafter give notice,
             in the manner in which the notice of redemption was given,
             that such moneys were not so received.

               (c)  Any Bonds and portions of Bonds which have been duly
             selected for redemption shall cease to bear interest on the
             specified redemption date provided that moneys sufficient to
             pay the principal of, premium, if any, and interest on such
             Bonds shall be on deposit with the Trustee on the date fixed
             for redemption so that such Bonds will be deemed to be paid in
             accordance with Article VIII hereof.

             Section 3.04.  Payment of Redemption Price.  For the
          redemption of any of the Bonds, the Authority shall cause to be
          deposited in the Bond Fund, on the redemption date, solely out of
          the Receipts and Revenues of the Authority from the Loan
          Agreement, an amount sufficient to pay the principal of and
          premium, if any, and interest to become due on such redemption
          date.  The obligation of the Authority to cause any such deposit
          to be made hereunder shall be reduced by the amount of moneys in
          the Bond Fund available on such redemption date for payment of
          the principal of and premium, if any, and accrued interest on the
          Bonds to be redeemed.

             Section 3.05.  No Partial Redemption After Default.  Anything
          in this Indenture to the contrary notwithstanding, if there shall
          have occurred and be continuing an Event of Default defined in
          clause (a) or (b) of the first paragraph of Section 9.01 hereof,
          there shall be no redemption of less than all of the Bonds at the
          time Outstanding other than a partial redemption in connection
          with an offer by the Company to purchase all Bonds Outstanding as
          contemplated in the first proviso to the first sentence of
          Section 3.02 hereof.


                                      ARTICLE IV

                                    THE BOND FUND

             Section 4.01.  Creation of Bond Fund.  There is hereby created
          and established with the Trustee a trust fund in the name of the
          Authority to be designated "The Industrial Development Authority
          of The County of Pima Industrial Development Revenue Bonds, 1997
          Series A (Tucson Electric Power Company Project) Bond Fund".  The
          Trustee shall establish and maintain within the Bond Fund a
          "Capital Account", an "Investment Account" and a "General
          Account".  In addition, the Trustee shall establish and maintain
          such segregated subaccounts within the Capital Account or the
          Investment Account and such other segregated subaccounts within
          the Bond Fund as may be requested by an Authorized Company
          Representative.  The Bond Fund, and all moneys and certificated
          securities therein, shall be kept in the possession of the
          Trustee.

             Section 4.02.  Liens.  The Authority shall not create any lien
          upon the Bond Fund or upon the Receipts and Revenues of the
          Authority from the Loan Agreement other than the lien hereby
          created.

             Section 4.03.  Deposits into Bond Fund.  (a) There shall be
          deposited into the Bond Fund:

                  (i) the accrued interest, if any, on the Bonds accrued to
               the date of delivery thereof and paid by the initial
               purchasers thereof, such accrued interest to be deposited
               into the General Account;

                  (ii) all amounts required to be deposited into the Bond
               Fund by Section 5.02 hereof, such amounts to be deposited
               into the Capital Account or the Investment Account;

                  (iii) all amounts required to be deposited into the Bond
               Fund by Sections 5.03 and 5.04 hereof, such amounts to be
               deposited into the General Account;

                  (iv) all Loan Payments, such payments and moneys to be
               deposited into the General Account; and

                  (v) all other moneys received by the Trustee under and
               pursuant to any provision of the Loan Agreement, other than
               Sections 5.03, 5.04 and 8.05 thereof, or from any other
               source when accompanied by directions by the Company that
               such moneys are to be paid into the Bond Fund, such moneys
               to be deposited into the account specified by such provision
               of the Loan Agreement or by such directions, or, if no
               specification is made, into the General Account.

               (b) All income or other gain from the investment of moneys
             in the Capital Account or the Investment Account shall be
             deposited into the Investment Account.  All income or other
             gain from the investment of moneys in the General Account
             shall be deposited into the General Account.

             Section 4.04.  Use of Moneys in Bond Fund.  (a)   Moneys, if
          any, paid into the Bond Fund pursuant to clause (i) of Section
          4.03(a) hereof shall be applied to the payment of interest on the
          Bonds.  Except as otherwise provided in Sections 4.06, 9.01 and
          10.04 hereof, all other moneys in the Bond Fund constituting part
          of the Trust Estate 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 and payable at maturity, upon
          redemption or otherwise.  

               (b) Moneys deposited pursuant to Section 5.02 hereof into
             the Capital Account or the Investment Account maintained
             within the Bond Fund, and any income or other gain from the
             investment thereof, shall be applied by the Trustee (i) in
             whole or in part (A) to the purchase of Bonds in such amounts,
             at such prices, at such times and otherwise as directed by an
             Authorized Company Representative, or to the redemption, at
             the direction of the Company, of Bonds pursuant to subsection
             (a) or, if applicable, (b) or (e) of Section 3.01 hereof or
             (B) in any other manner directed by an Authorized Company
             Representative which, as indicated in an opinion of Bond
             Counsel furnished by the Company to the Authority and the
             Trustee, will not, in and of itself, impair the validity under
             the Act of the Bonds or the exclusion of the interest on the
             Bonds from gross income for federal income tax purposes, or,
             in the absence of any such purchase, redemption or direction
             on or prior to the forty-fifth (45th) day prior to the first
             interest payment date specified in Section 3.01(d) hereof,
             (ii) to the payment of principal upon the redemption, from
             time to time, of Bonds pursuant to Section 3.01(d) hereof, any
             moneys which are not so applied to be retained in the accounts
             into which they were deposited and applied by the Trustee to
             the payment of principal of Bonds either at maturity or upon
             the redemption of all or any portion of the Bonds, whichever
             occurs first.  Pending the application of moneys deposited
             into the Bond Fund pursuant to Section 5.02 hereof, such
             moneys may be invested in Investment Securities in the manner
             permitted by Section 6.01 hereof, provided that such
             investment shall not produce a yield greater than the yield on
             the Bonds unless, as indicated in an opinion of Bond Counsel
             furnished by the Company to the Authority and the Trustee,
             investments producing a greater yield would not, in and of
             itself, impair the exclusion from gross income for federal tax
             purposes of the interest on the Bonds.

               (c) In the event that all of the Bonds cease to be
             Outstanding, any moneys remaining in the Capital Account or
             the Investment Account shall be deposited into the General
             Account.

             Section 4.05.  Custody of Bond Fund; Withdrawal of Moneys. 
          The Bond Fund shall be in the custody of the Trustee but in the
          name of the Authority and the Authority hereby authorizes and
          directs the Trustee to withdraw from the Bond Fund and furnish to
          the Paying Agent funds constituting part of the Trust Estate
          sufficient to pay the principal of and premium, if any, and
          interest on the Bonds as the same shall become due and payable,
          and to withdraw from the Bond Fund funds sufficient to pay any
          other amounts payable therefrom as the same shall become due and
          payable.

             Section 4.06.  Bonds Not Presented for Payment.  In the event
          any Bonds shall not be presented for payment when the principal
          thereof and premium, if any, thereon become due, either at
          maturity or at the date fixed for redemption thereof or
          otherwise, if moneys sufficient to pay such Bonds are held by the
          Paying Agent or any Co-Paying Agent for the benefit of the Owners
          thereof, the Paying Agent shall segregate and hold such moneys in
          trust, without liability for interest thereon, for the benefit of
          the Owners of such Bonds, who shall, except as provided in the
          following paragraph, thereafter be restricted exclusively to such
          fund or funds for the satisfaction of any claim of whatever
          nature on their part under this Indenture or relating to said
          Bonds.

             Any moneys which the Paying Agent shall segregate and hold in
          trust for the payment of the principal of and premium, if any, or
          interest on any Bond and remaining unclaimed for one year after
          such principal, premium, if any, or interest has become due and
          payable shall, upon the Company's written request to the Paying
          Agent, be paid to the Company, with notice to the Trustee of such
          action; provided, however, that before the Paying Agent shall be
          required to make any such repayment, the Paying Agent shall, at
          the expense of the Company cause notice to be given once by
          Publication to the effect that such money remains unclaimed and
          that, after a date specified therein, which shall not be less
          than thirty (30) days from the date of such notice by
          Publication, any unclaimed balance of such moneys then remaining
          will be paid to the Company.  After the payment of such unclaimed
          moneys to the Company, the Owner of such Bond shall thereafter
          look only to the Company for the payment thereof, and all
          liability of the Authority, the Trustee and the Paying Agent with
          respect to such moneys shall thereupon cease.

             Section 4.07.  Moneys Held in Trust.  All moneys and
          Investment Securities held by the Trustee in the Bond Fund, and
          all moneys required to be deposited with or paid to the Trustee
          for deposit into the Bond Fund, and all moneys withdrawn from the
          Bond Fund and held by the Trustee, the Paying Agent, any
          Co-Paying Agent, shall be held by the Trustee, the Paying Agent
          or any Co-Paying Agent, as the case may be, in trust, and such
          moneys and Investment Securities (other than moneys held pursuant
          to Section 4.06 hereof and moneys or Investment Securities held
          in the Rebate Fund established in furtherance of the obligations
          of the Company under clause (b) of Section 6.04 of the Loan
          Agreement), while so held or so required to be deposited or paid,
          shall constitute part of the Trust Estate and be subject to the
          lien and security interest created hereby in favor of the Trustee
          for the benefit of the Owners from time to time of the Bonds. 
          The Company shall have no right, title or interest in the Bond
          Fund, except such rights as may arise after the right, title and
          interest of the Trustee in and to the Trust Estate and all
          covenants, agreements and other obligations of the Authority
          under this Indenture shall have ceased, terminated and become
          void and shall have been satisfied and discharged in accordance
          with Article VIII hereof.


                                      ARTICLE V

                                THE CONSTRUCTION FUND

             Section 5.01.  Creation of, and Disbursements from,
          Construction Fund.  (a) There is hereby created and established
          with the Trustee a trust fund in the name of the Authority to be
          designated "The Industrial Development Authority of the County of
          Pima Industrial Development Revenue Bonds, 1997 Series A (Tucson
          Electric Power Company Project) Construction Fund".  The Trustee
          shall establish and maintain within the Construction Fund a
          "Capital Account" and an "Investment Account".  The Trustee shall
          establish and maintain any subaccount within the Capital Account
          or the Investment Account which may be requested by an Authorized
          Company Representative.  The Construction Fund, and all moneys
          and certificated securities therein, shall be kept in the
          possession of the Trustee.  The Authority shall not create any
          lien upon the Construction Fund other than the lien hereby
          created.

               (b) The proceeds from the issuance and sale of the Bonds,
             other than the $20,000,000 deposited in escrow with the
             trustee for the 1990 Bonds as provided in Section 4.03 of the
             Loan Agreement and accrued interest, if any, on such Bonds to
             the date of delivery thereof paid by the initial purchasers
             thereof, shall be deposited into the Capital Account.  All
             income or other gain from the investment of moneys in the
             Capital Account or the Investment Account shall be deposited
             into the Investment Account.  In the event that all or a
             portion of the proceeds of the Bonds shall have been applied
             to the payment or redemption, or provision therefor, of any
             obligations issued by the Authority other than Bonds, any
             balance remaining in the construction, acquisition or other
             similar fund maintained in respect of such obligations, which
             balance shall have been delivered to the Trustee accompanied
             by a direction of the Company that such balance be deposited
             into the Construction Fund, shall be deposited into the
             Capital Account and the Investment Account in accordance with
             such direction.

               (c) The Trustee is hereby authorized and directed to
             disburse moneys in the Construction Fund to or upon the order
             of the Company from time to time upon receipt by the Trustee
             of requisitions executed by, or communications by telegram,
             telex or facsimile transmission from, an Authorized Company
             Representative, which requisitions or communications shall
             state with respect to each payment to be made: (i) the
             requisition number, (ii) the name and address of the person,
             firm or corporation to whom payment is due or has been made
             (or, in the case of payments to the Bond Fund, instructions to
             make such payments thereto), (iii) the amount paid or to be
             paid, (iv) the account or accounts within the Construction
             Fund from which payment of such requisition, or any portion
             thereof, shall be made, (v)(A) that each obligation, item of
             cost or expense with respect to which such requisition is
             being made has been properly incurred and has been paid or is
             then due and payable as an item of the Cost of Construction,
             is a proper charge against the Construction Fund, and has not
             been the basis of any previous final payment therefrom or from
             the proceeds of any other obligations issued by the Authority
             or (B) in the event that a portion of the Bonds shall have
             been paid, redeemed or deemed to have been paid within the
             meaning of Article VIII hereof by reason of the application of
             the proceeds of the sale of any obligations issued under an
             indenture other than this Indenture and if the payment of such
             requisition is to be made into the construction, acquisition
             or other similar fund created under such other indenture, that
             upon disbursement from such construction, acquisition or other
             similar fund, each obligation, item of cost or expense
             mentioned in the requisition for such disbursement shall have
             been properly incurred and shall have been paid or will then
             be due and payable as an item of the Cost of Construction,
             (vi) that the payment of such requisition will not result in a
             breach of any of the covenants of the Company contained in
             Section 4.04 (c) or (d) of the Loan Agreement and (vii) that,
             to the best of the knowledge of such Authorized Company
             Representative, there shall not have occurred and be
             continuing any event of default under the Loan Agreement.  In
             Section 4.04 of the Loan Agreement the Company has agreed that
             any such communication by telegram, telex or facsimile
             transmission shall be promptly confirmed by a requisition
             executed by an Authorized Company Representative.

               (d) In paying any requisition under this Section 5.01, the
             Trustee shall be entitled to rely as to the completeness and
             accuracy of all statements in such requisition upon the
             approval of such requisition by an Authorized Company
             Representative, execution thereof to be conclusive evidence of
             such approval, and the Company has by the provisions of the
             Loan Agreement covenanted and agreed to indemnify and save
             harmless the Trustee from any liability incurred in connection
             with the payment of any requisition so executed by an
             Authorized Company Representative.

             The Trustee shall keep and maintain adequate records
          pertaining to each account within the Construction Fund and all
          disbursements therefrom and, upon receipt of a certificate
          furnished pursuant to Section 3.04 or Section 3.08(b) of the Loan
          Agreement, the Trustee shall, if requested by the Authority or
          the Company, file an accounting thereof with the Authority and
          with the Company.

             Section 5.02.  Completion of Facilities; Termination of
          Construction.    Upon receipt by the Trustee of a certificate
          furnished pursuant to Section 3.04 or Section 3.08(b) of the Loan
          Agreement, any balance remaining in the Capital Account or the
          Investment Account maintained within the Construction Fund (other
          than amounts retained by the Trustee at the direction of the
          Company pursuant to Section 3.04 or 3.08 of the Loan Agreement or
          in furtherance of the covenant of the Company contained in clause
          (b) of Section 6.04 of the Loan Agreement) shall (a) be applied
          in whole or in part (i) to the purchase of Bonds in such amounts,
          at such prices, at such times and otherwise as directed by an
          Authorized Company Representative, or (ii) in any other manner
          directed by the Company which, as indicated in an opinion of Bond
          Counsel furnished by the Company to the Authority and the
          Trustee, will not impair the validity under the Act of the Bonds
          or the exclusion of the interest on the Bonds from gross income
          for federal income tax purposes or (b) in the absence of any such
          purchase or direction within sixty (60) days of the receipt by
          the Trustee of such certificate (or such shorter period as the
          Company shall direct), be deposited by the Trustee into the
          corresponding account maintained within the Bond Fund.  From time
          to time as the proper disposition of the amounts retained by the
          Trustee in the Construction Fund as aforesaid shall be
          determined, to the extent that such amounts are not paid out in
          full by the Trustee pursuant to Section 5.01 or 6.01 hereof, the
          Company shall so notify the Trustee and the Authority by one or
          more certificates as aforesaid and any amounts from time to time
          no longer to be so retained by the Trustee shall be applied as
          aforesaid.  Pending the application of any moneys remaining in
          the Construction Fund following the receipt of the aforesaid
          certificate, such moneys may be invested in Investment Securities
          in the manner permitted by Section 6.01 hereof, provided that
          such investments (other than investments made with the moneys
          retained by the Trustee at the direction of the Company pursuant
          to Section 3.04 or 3.08 of the Loan Agreement) shall not produce
          a yield greater than the yield on the Bonds unless, as indicated
          in an opinion of Bond Counsel furnished by the Company to the
          Authority and the Trustee, investments producing a greater yield
          would not, in and of itself, impair the exclusion from gross
          income for federal tax purposes of the interest on the Bonds.

             Section 5.03.  Redemption of All Outstanding Bonds.  Except as
          set forth in Section 5.05 hereof, in the event that all
          Outstanding Bonds are to be redeemed, the Trustee shall, without
          further authorization, deposit into the General Account within
          the Bond Fund all amounts remaining in the Construction Fund
          constituting part of the Trust Estate, with advice to the
          Authority and the Company of such action, such deposit to be made
          on the date fixed for such redemption.

             Section 5.04.  Acceleration of Bonds.  In the event that the
          principal of the Bonds shall have become due and payable pursuant
          to Section 9.01 hereof, the Trustee shall, without further
          authorization, deposit into the General Account within the Bond
          Fund all amounts constituting part of the Trust Estate remaining
          in the Construction Fund, with advice to the Authority and the
          Company of such action, such deposit to be made on the date fixed
          for such acceleration.

             Section 5.05.  Refunding of Bonds.  In the event that all
          Outstanding Bonds are paid, redeemed or deemed to have been paid
          within the meaning of Article VIII hereof by reason of the
          application of the proceeds of the sale of any obligations the
          interest on which is exempt from federal income taxation, under
          an indenture other than this Indenture, the Trustee shall,
          without further authorization, withdraw all amounts constituting
          part of the Trust Estate remaining in the Capital Account and the
          Investment Account maintained within the Construction Fund and
          deposit such amounts into corresponding accounts in the
          construction, acquisition or other similar fund created under the
          indenture under which such obligations are issued, with advice to
          the Authority and the Company of such action, such withdrawals
          and deposits to be made, in accordance with the provisions of
          such indenture, on the date on which such Bonds are so paid,
          redeemed or deemed to have been paid; provided, however, that if
          Bonds shall have been paid, redeemed or deemed to have been paid
          within the meaning of Article VIII hereof by reason of the
          application of the proceeds of the sale of more than one issue of
          obligations the interest on which is excluded from gross income
          for federal income tax purposes under indentures other than this
          Indenture, the Trustee shall, if directed by an Authorized
          Company Representative, withdraw all amounts remaining in the
          Capital Account and the Investment Account maintained within the
          Construction Fund and such amounts shall be allocated among, and
          deposited into, as directed by such Authorized Company
          Representative, corresponding accounts in the construction,
          acquisition or other similar funds created under the indentures
          under which such obligations are issued, with advice to the
          Authority and the Company of such action, such withdrawals and
          deposits to be made, in accordance with the provisions of such
          indentures, on the date on which all Bonds are so paid, redeemed
          or deemed to have been paid.

             Section 5.06.  Moneys Held in Trust.  All moneys and
          Investment Securities held by the Trustee in the Construction
          Fund, shall be held by the Trustee, in trust and such moneys and
          Investment Securities (other than any moneys or Investment
          Securities held in any subaccount within the Construction Fund
          established in furtherance of the obligations of the Company
          under Section 6.04(b) of the Loan Agreement) while so held or so
          required to be deposited or paid, shall constitute part of the
          Trust Estate and be subject to the lien and security interest
          created hereby in favor of the Trustee for the benefit of the
          Owners from time to time of the Bonds.  The Company shall have no
          right, title or interest in the Construction Fund, except that,
          to the extent not required to be applied in another manner by any
          provision hereof, moneys held by the Trustee in the Construction
          Fund shall be disbursed by the Trustee to the Company upon and to
          the extent of, but solely upon and to the extent of, satisfaction
          of the conditions set forth in Section 5.01(c) hereof.


                                      ARTICLE VI

                                     INVESTMENTS

             Section 6.01.  Investments.  The moneys in the Construction
          Fund and in the Bond Fund shall, at the direction of the Company,
          be invested and reinvested in Investment Securities.  Any
          Investment Securities may be purchased subject to options or
          other rights in third parties to acquire the same.  In addition,
          except with respect to moneys or Investment Securities held
          within the General Account of the Bond Fund, the Trustee shall,
          at the direction of the Company, enter into (i) reverse
          repurchase agreements, option agreements and agreements to lend
          securities with respect to any Investment Securities held by it
          and (ii) transactions for the purchase or sale of financial
          futures contracts in obligations which constitute Investment
          Securities or options on financial futures contracts in
          obligations which constitute Investment Securities.  Subject to
          the further provisions of this Section 6.01, such investments
          shall be made by the Trustee as directed and designated by the
          Company in a certificate of, or telephonic advice promptly
          confirmed by a certificate of, an Authorized Company
          Representative.  As and when any amounts thus invested may be
          needed for disbursements from the Construction Fund or the Bond
          Fund, the Trustee shall request the Company to designate such
          investments to be sold or otherwise converted into cash to the
          credit of such fund as shall be sufficient to meet such
          disbursement requirements and shall then follow any directions in
          respect thereto of an Authorized Company Representative.  As long
          as no Event of Default (as defined in Section 9.01 hereof) shall
          have occurred and be continuing, the Company shall have the right
          to designate the investments to be sold and to otherwise direct
          the Trustee in the sale or conversion to cash of the investments
          made with the moneys in the Construction Fund and in the Bond
          Fund, provided that the Trustee shall be entitled to conclusively
          assume the absence of any such Event of Default unless it has
          notice thereof within the meaning of Section 10.05 hereof.


                                     ARTICLE VII

                                  GENERAL COVENANTS

             Section 7.01.  No General Obligations.  Each and every
          covenant herein made, including all covenants made in the various
          sections of this Article VII, is predicated upon the condition
          that neither Pima County, Arizona nor the State of Arizona shall
          in any event be liable for the payment of the principal of, or
          premium, if any, or interest on the Bonds or for the performance
          of any pledge, mortgage, obligation or agreement created by or
          arising out of this Indenture or the issuance of the Bonds, and
          further that neither the Bonds, nor the premium, if any, or
          interest thereon, nor any such obligation or agreement of the
          Authority shall be construed to constitute an indebtedness of
          Pima County, Arizona or the State of Arizona within the meaning
          of any constitutional or statutory provisions whatsoever.  The
          Bonds and the interest and premium, if any, thereon shall be
          limited obligations of the Authority payable solely from the
          Receipts and Revenues of the Authority from the Loan Agreement
          and the other moneys pledged therefor.

             The Authority shall promptly cause to be paid, solely from the
          sources stated herein, the principal of and premium, if any, and
          interest on every Bond issued under this Indenture at the place,
          on the dates and in the manner provided herein and in said Bonds
          according to the true intent and meaning thereof.

             Section 7.02.  Performance of Covenants of the Authority;
          Representations.  The Authority shall faithfully perform at all
          times any and all covenants, undertakings, stipulations and
          provisions contained in this Indenture, in any and every Bond
          executed, authenticated and delivered hereunder, and in all
          proceedings pertaining thereto.  The Authority represents that it
          is duly authorized under the Constitution and laws of the State
          of Arizona to issue the Bonds authorized hereby, to enter into
          the Loan Agreement and this Indenture, and to pledge and assign
          to the Trustee the Trust Estate, and that the Bonds in the hands
          of the Owners thereof are and will be valid and binding limited
          obligations of the Authority.

             Section 7.03.  Maintenance of Rights and Powers; Compliance
          with Laws.  The Authority shall at all times use its best efforts
          to maintain its corporate existence or assure the assumption of
          its obligations under this Indenture by any public body
          succeeding to its powers under the Act; and it shall at all times
          use its best efforts to comply with all valid acts, rules,
          regulations, orders and directions of any legislative, executive,
          administrative or judicial body known to it to be applicable to
          the Loan Agreement and this Indenture.

             Section 7.04.  Enforcement of Obligations of the Company;
          Amendments.  Upon receipt of written notification from the
          Trustee, the Authority shall cooperate with the Trustee in
          enforcing the obligation of the Company to pay or cause to be
          paid all the payments and other costs and charges payable by the
          Company under the Loan Agreement.  The Authority shall not enter
          into any agreement with the Company amending the Loan Agreement
          without the prior written consent of the Trustee and compliance
          with Sections 12.06 and 12.07 of this Indenture (a revision to
          Exhibit A to the Loan Agreement not being deemed an amendment for
          purposes of this Section).

             Section 7.05.  Further Instruments.  The Authority shall, upon
          the reasonable request of the Trustee, from time to time execute
          and deliver such further instruments and take such further action
          as may be reasonable and as may be required to carry out the
          purposes of this Indenture; provided, however, that no such
          instruments or actions shall pledge the credit or taxing power of
          the State of Arizona, Pima County, the Authority or any other
          political subdivision of said State.

             Section 7.06.  No Disposition of Trust Estate.  Except as
          permitted by this Indenture, the Authority shall not sell, lease,
          pledge, assign or otherwise dispose of or encumber its interest
          in the Trust Estate and will promptly pay or cause to be
          discharged or make adequate provision to discharge any lien or
          charge on any part thereof not permitted hereby.

             Section 7.07.  Financing Statements.  The Authority and the
          Trustee shall cooperate with the Company in causing appropriate
          financing statements, naming the Trustee as pledgee of the
          Receipts and Revenues of the Authority from the Loan Agreement
          and of the other moneys pledged under the Indenture for the
          payment of the principal of and premium, if any, and interest on
          the Bonds, and as pledgee and assignee of the balance of the
          Trust Estate, and the Authority shall cooperate with the Trustee
          and the Company in causing appropriate continuation statements to
          be duly filed and recorded in the appropriate state and county
          offices as required by the provisions of the Uniform Commercial
          Code or other similar law as adopted in the State of Arizona and
          any other applicable jurisdiction, as from time to time amended,
          in order to perfect and maintain the security interests created
          by this Indenture.

             Section 7.08.  Tax Covenants; Rebate Fund.  (a)  The Authority
          covenants for the benefit of all Owners from time to time of the
          Bonds that it will not directly or indirectly use or (to the
          extent within its control), permit the use of, the proceeds of
          any of the Bonds or any other funds of the Authority, or take or
          omit to take any other action, if and to the extent that such
          use, or the taking or omission to take such action, would cause
          any of the Bonds to be "arbitrage bonds" within the meaning of
          Section 148 of the Code 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 Authority covenants to comply with all covenants set
          forth in the Tax Agreement, which is hereby incorporated herein
          by reference as though fully set forth herein.

               (b)  The Trustee shall establish and maintain a fund
             separate from any other fund established and maintained
             hereunder designated "The Industrial Development Authority of
             the County of Pima Industrial Development Revenue Bonds, 1997
             Series A (Tucson Electric Power Company Project) Rebate Fund"
             (herein called the "Rebate Fund") in accordance with the
             provisions of the Tax Agreement.  Within the Rebate Fund, the
             Trustee shall maintain such accounts as shall be directed by
             the Company in order for the Authority and the Company to
             comply with the provisions of the Tax Agreement.  Subject to
             the transfer provisions provided in paragraph (c) below, 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 Requirement (as defined in the Tax Agreement), for
             payment to the United States of America, and neither the
             Company, the Authority or the Owners shall have any rights in
             or claim to such moneys.  All amounts deposited into or on
             deposit in the Rebate Fund shall be governed by this Section
             7.08, by Section 6.04 of the Loan Agreement and by the Tax
             Agreement.  The Trustee shall conclusively be deemed to have
             complied with such provisions if it follows the directions of
             the Company, including supplying all necessary information in
             the manner set forth in the Tax Agreement, and shall not be
             required to take any actions thereunder in the absence of
             written directions from the Company.

               (c)  Upon receipt of the Company's written instructions, the
             Trustee shall remit part or all of the balances in the Rebate
             Fund to the United States of America, as so directed.  In
             addition, if the Company so directs, the Trustee shall deposit
             moneys into or transfer moneys out of the Rebate Fund from or
             into such accounts or funds as directed by the Company's
             written directions.  Any funds remaining in the Rebate Fund
             after all of the Bonds shall have been paid and any Rebate
             Requirement shall have been satisfied, or provision therefor
             reasonably satisfactory to the Trustee shall have been made,
             shall be withdrawn and remitted to the Company.

               (d)  Notwithstanding any provision of this Indenture, the
             obligation to remit the Rebate Requirement to the United
             States of America and to comply with all other requirements of
             this Section 7.08, Section 6.04 of the Loan Agreement and the
             Tax Agreement shall survive the payment of the Bonds and the
             satisfaction and discharge of this Indenture.

             Section 7.09.  Notices of Trustee.  The Trustee shall give
          notice to both the Authority and the Company whenever it is
          required hereby to give notice to either and, additionally, shall
          furnish to the Authority and the Company copies of any Notice by
          Mail or Publication given by it pursuant to any provision hereof.


                                     ARTICLE VIII

                                      DEFEASANCE

             Section 8.01.  Defeasance.  If the Authority shall pay or
          cause to be paid to the Owner of any Bond secured hereby the
          principal of and premium, if any, and interest due and payable,
          and thereafter to become due and payable, upon such Bond or any
          portion of such Bond in the principal amount of $5,000 or any
          integral multiple thereof, such Bond or portion thereof shall
          cease to be entitled to any lien, benefit or security under this
          Indenture.  If the Authority shall pay or cause to be paid to the
          Owners of all the Bonds secured hereby the principal of and
          premium, if any, and interest due and payable, and thereafter to
          become due and payable, thereon, and shall pay or cause to be
          paid all other sums payable hereunder including, without
          limitation, amounts payable pursuant to Section 10.04 hereof,
          then, and in that case, the right, title and interest of the
          Trustee in and to the Trust Estate shall thereupon cease,
          terminate and become void.  In such event, the Trustee shall
          assign, transfer and turn over to the Company the Trust Estate,
          including, without limitation, any surplus in the Bond Fund and
          any balance remaining in any other fund created under this
          Indenture.

             All or any portion of Outstanding Bonds or portions of Bonds
          in principal amounts of $5,000 or any integral multiple thereof,
          shall prior to the maturity or redemption date thereof be deemed
          to have been paid within the meaning and with the effect
          expressed in this Article VIII, and the entire indebtedness of
          the Authority with respect thereof shall be satisfied and
          discharged, when

               (a) in the event said Bonds or portions thereof have been
             selected for redemption in accordance with Section 3.02
             hereof, the Trustee shall have given, or the Company shall
             have given to the Trustee in form satisfactory to it
             irrevocable instructions to give, on a date in accordance with
             the provisions of Section 3.03 hereof, notice of redemption of
             such Bonds or portions thereof,

               (b) there shall have been deposited with the Trustee either
             moneys in an amount which shall be sufficient, or Government
             Obligations which shall not contain provisions permitting the
             redemption thereof at the option of the issuer, the principal
             of and the interest on which, when due, and without regard to
             any reinvestment thereof, will provide moneys which, together
             with the moneys, if any, deposited with or held by the
             Trustee, shall be sufficient, to pay when due the principal of
             and premium, if any, and interest due and to become due on
             said Bonds or portions thereof on and prior to the redemption
             date or maturity date thereof, as the case may be, and 

               (c) in the event said Bonds or portions thereof do not
             mature and are not to be redeemed within the next succeeding
             sixty (60) days, the Company shall have given the Trustee in
             form satisfactory to it irrevocable instructions to give, as
             soon as practicable in the same manner as a notice of
             redemption is given pursuant to Section 3.03 hereof, a notice
             to the Owners of said Bonds or portions thereof that the
             deposit required by clause (b) above has been made with the
             Trustee and that said Bonds or portions thereof are deemed to
             have been paid in accordance with this Article VIII and
             stating the maturity or redemption date upon which moneys are
             to be available for the payment of the principal of and
             premium, if any, and interest on said Bonds or portions
             thereof.

             Neither the Government Obligations nor moneys deposited with
          the Trustee pursuant to this Article VIII nor principal or
          interest payments on any such Government Obligations shall be
          withdrawn or used for any purpose other than, and such Government
          Obligations, moneys and principal or interest payments shall be
          held in trust for, the payment of the principal of and premium,
          if any, and interest on said Bonds or portions thereof; provided,
          that any cash received from such principal or interest payments
          on such Government Obligations deposited with the Trustee, if not
          then needed for such purposes, shall, to the extent practicable,
          be invested in Government Obligations of the type described in
          clause (b) of the preceding paragraph maturing at times and in
          amounts sufficient to pay when due the principal of and premium,
          if any, and interest to become due on said Bonds or portions
          thereof on and prior to such redemption date or maturity date
          thereof, as the case may be, and interest earned from such
          reinvestments shall be paid over to the Company, as received by
          the Trustee, free and clear of any trust, lien or pledge
          hereunder.  If payment of less than all the Bonds is to be
          provided for in the manner and with the effect provided in this
          Article VIII, the Trustee shall select such Bonds or portions of
          Bonds in the manner specified by Section 3.02 hereof for
          selection for redemption of less than all Bonds in the principal
          amount designated to the Trustee by the Company.  At or prior to
          the time of the deposit of any Government Obligations with the
          Trustee pursuant to this Section 8.01, the Company shall provide
          the Trustee with a certificate of an accountant or an accounting
          firm as to the sufficiency of such Government Obligations to pay
          when due the principal of and premium, if any, and interest due
          and to become due as set forth in clause (b) of the preceding
          paragraph.


                                      ARTICLE IX

                                DEFAULTS AND REMEDIES

             Section 9.01.  Events of Default.  Each of the following
          events shall constitute and is referred to in this Indenture as
          an "Event of Default":

               (a) a failure to pay the principal of or premium, if any, on
             any of the Bonds when the same shall become due and payable at
             maturity, upon redemption or otherwise;

               (b) a failure to pay an installment of interest on any of
             the Bonds after such interest shall have become due and
             payable for a period of thirty (30) days;

               (c) a failure by the Authority to observe and perform any
             covenant, condition, agreement or provision (other than as
             specified in clauses (a) and (b) of this Section 9.01)
             contained in the Bonds or in this Indenture on the part of the
             Authority to be observed or performed, which failure shall
             continue for a period of sixty (60) days after written notice,
             specifying such failure and requesting that it be remedied,
             shall have been given to the Authority and the Company by the
             Trustee, which may give such notice in its discretion and
             which shall give such notice at the written request of Owners
             of not less than 33% in principal amount of the Bonds then
             Outstanding, unless the Trustee, or the Trustee and Owners of
             a principal amount of Bonds not less than the principal amount
             of Bonds the Owners of which requested that such notice be
             given, as the case may be, shall agree in writing to an
             extension of such period prior to its expiration; provided,
             however, that the Trustee, or the Trustee and the Owners of
             such principal amount of Bonds, as the case may be, shall be
             deemed to have agreed to an extension of such period if
             corrective action is initiated by the Authority, or the
             Company on behalf of the Authority, within such period and is
             being diligently pursued.

             Upon the occurrence and continuance of any Event of Default
          described in clause (a) or (b) of the preceding paragraph, the
          Trustee may, and at the written request of Owners of not less
          than 33% in principal amount of Bonds then Outstanding shall, by
          written notice to the Authority and the Company, declare the
          Bonds to be immediately due and payable, whereupon they shall,
          without further action, become and be immediately due and
          payable, anything in this Indenture or in the Bonds to the
          contrary notwithstanding, and the Trustee shall give notice
          thereof by Mail to all Owners of Outstanding Bonds.

             The provisions of the preceding paragraph, however, are
          subject to the condition that if, after the principal of the
          Bonds shall have been so declared to be 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, the
          Authority shall cause to be deposited with the Trustee a sum
          sufficient to pay all matured installments of interest upon all
          Bonds and the principal of any and all Bonds which shall have
          become due otherwise than by reason of such declaration (with
          interest upon such principal and, to the extent permissible by
          law, on overdue installments of interest, at the rate per annum
          borne by the Bonds) and such amounts as shall be sufficient to
          cover reasonable compensation and reimbursement of expenses
          payable to the Trustee and any predecessor Trustee, and all
          Events of Default hereunder other than nonpayment of the
          principal of Bonds which shall have become due by said
          declaration shall have been remedied, then, in every such case,
          such Event of Default shall be deemed waived and such declaration
          and its consequences rescinded and annulled, and the Trustee
          shall promptly give written notice of such waiver, rescission and
          annulment to the Authority and the Company, and, if notice of the
          acceleration of the Bonds shall have been given to the Owners of
          the Bonds, shall give notice thereof by Mail to all Owners of
          Outstanding Bonds; but no such waiver, rescission and annulment
          shall extend to or affect any subsequent Event of Default or
          impair any right or remedy consequent thereon.

             Section 9.02.  Remedies.  Upon the occurrence and continuance
          of any Event of Default, then and in every such case the Trustee
          in its discretion may, and upon the written request of Owners of
          not less than a majority in principal amount of the Bonds then
          Outstanding and receipt of indemnity to its satisfaction shall,
          in its own name and as the Trustee of an express trust:

               (a) by mandamus, or other suit, action or proceeding at law
             or in equity, enforce all rights of the Owners of the Bonds,
             and require the Authority or the Company to carry out any
             agreements with or for the benefit of such Owners and to
             perform its or their duties under the Act, the Loan Agreement
             and this Indenture;

               (b) bring suit upon the Bonds; or

               (c) by action or suit in equity enjoin any acts or things
             which may be unlawful or in violation of the rights of the
             Owners of the Bonds.

             Section 9.03.  Restoration to Former Position.  In the event
          that any proceeding taken by the Trustee to enforce any right
          under this Indenture shall have been discontinued or abandoned
          for any reason, or shall have been determined adversely to the
          Trustee, then the Authority, the Trustee and the Owners shall be
          restored, subject to any determination in such proceeding, to
          their former positions and rights hereunder, respectively, and
          all rights, remedies and powers of the Trustee shall continue as
          though no such proceeding had been taken.

             Section 9.04.  Owners' Right to Direct Proceedings.  Anything
          in this Indenture to the contrary notwithstanding, the Owners of
          a majority in principal amount of the Bonds then Outstanding
          hereunder shall have the right, by an instrument in writing
          executed and delivered to the Trustee, to direct the time, method
          and place of conducting all remedial proceedings available to the
          Trustee under this Indenture or exercising any trust or power
          conferred on the Trustee by this Indenture; provided, however,
          that such direction shall not be otherwise than in accordance
          with law and the provisions of this Indenture and that the
          Trustee shall have the right (but not the obligation) to decline
          to follow any such direction if the Trustee, being advised by
          counsel, shall determine that the action or proceeding so
          directed may not lawfully be taken, or if the Trustee in good
          faith shall determine that the action or proceedings so directed
          would involve the Trustee in personal liability or if the Trustee
          in good faith shall so determine that the actions or forbearances
          specified in or pursuant to such direction would be unduly
          prejudicial to the interests of Owners not joining in the giving
          of said direction, it being understood that the Trustee shall
          have no duty to ascertain whether or not such actions or
          forbearances are unduly prejudicial to such Owners.

             Section 9.05.  Limitation on Owners' Right to Institute
          Proceedings.  No Owner of Bonds shall have any right to institute
          any suit, action or proceeding in equity or at law for the
          execution of any trust or power hereunder, or any other remedy
          hereunder or on said Bonds, unless such Owner previously shall
          have given to the Trustee written notice of an Event of Default
          as hereinabove provided and unless the Owners of not less than a
          majority in principal amount of the Bonds then Outstanding shall
          have made written request of the Trustee so to do, after the
          right to institute said suit, action or proceeding shall have
          accrued, and shall have afforded the Trustee a reasonable
          opportunity to proceed to institute the same in either its or
          their name, and unless there also shall have been offered to the
          Trustee security and indemnity satisfactory to it against the
          costs, expenses and liabilities to be incurred therein or
          thereby, and the Trustee shall not have complied with such
          request within a reasonable time; and such notification, request
          and offer of indemnity are hereby declared in every such case, at
          the option of the Trustee, to be conditions precedent to the
          institution of said suit, action or proceeding; it being
          understood and intended that no one or more of the Owners of the
          Bonds shall have any right in any manner whatever by his or their
          action to affect, disturb or prejudice the security of this
          Indenture, or to enforce any right hereunder or under the Bonds,
          except in the manner herein provided, and that all suits, actions
          and proceedings at law or in equity shall be instituted, had and
          maintained in the manner herein provided and for the equal
          benefit of all Owners of the Bonds.

             Section 9.06.  No Impairment of Right to Enforce Payment. 
          Notwithstanding any other provision in this Indenture, the right
          of any Owner of a Bond to receive payment of the principal of and
          premium, if any, and interest on such Bond, on or after the
          respective due dates expressed therein, 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 Owner.

             Section 9.07.  Proceedings by Trustee without Possession of
          Bonds.  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 on the trial or other proceedings relative
          thereto, and any such suit, action or proceeding instituted by
          the Trustee shall be brought in its name for the equal and
          ratable benefit of the Owners of the Bonds, subject to the
          provisions of this Indenture.

             Section 9.08.  No Remedy Exclusive.  No remedy herein
          conferred upon or reserved to the Trustee or to the Owners of the
          Bonds is intended to be exclusive of any other remedy or
          remedies, and each and every such remedy shall be cumulative, and
          shall be in addition to every other remedy given hereunder or
          under the Loan Agreement, now or hereafter existing at law or in
          equity or by statute.

             Section 9.09.  No Waiver of Remedies.  No delay or omission of
          the Trustee or of any Owner of a Bond 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 of any such default,
          or an acquiescence therein; and every power and remedy given by
          this Article IX to the Trustee and to the Owners of the Bonds,
          respectively, may be exercised from time to time and as often as
          may be deemed expedient.

             Section 9.10.  Application of Moneys.  Any moneys received by
          the Trustee, by any receiver or by any Owner of a Bond pursuant
          to any right given or action taken under the provisions of this
          Article IX, after payment of the costs and expenses of the
          proceedings resulting in the collection of such moneys and of all
          amounts due to the Trustee and any predecessor Trustee under
          Section 10.04 hereof, shall be deposited in the Bond Fund and all
          moneys so deposited in the Bond Fund during the continuance of an
          Event of Default (other than moneys for the payment of Bonds
          which had matured or otherwise become payable prior to such Event
          of Default or for the payment of interest due prior to such Event
          of Default) shall be applied as follows:

               (a) Unless the principal of all the Bonds shall have become
             due and payable, all such moneys shall be applied (i) first,
             to the payment to the persons entitled thereto of all
             installments of interest then due on the Bonds, with interest
             on overdue installments, if lawful, at the rate per annum
             borne by the Bonds, in the order of maturity of the
             installments of such interest and, if the amount available
             shall not be sufficient to pay in full any particular
             installment of interest, then to the payment ratably,
             according to the amounts due on such installment, and (ii)
             second, to the payment to the persons entitled thereto of the
             unpaid principal of any of the Bonds which shall have become
             due (other than Bonds called for redemption for the payment of
             which money is held pursuant to the provisions of this
             Indenture), with interest on such Bonds at their rate from the
             respective dates upon which they became due and, if the amount
             available shall not be sufficient to pay in full Bonds due on
             any particular date, together with such interest, then to the
             payment ratably, according to the amount of principal and
             interest due on such date, in each case to the persons
             entitled thereto, without any discrimination or privilege.

               (b) If the principal of all the Bonds shall have become due
             and payable, all such moneys shall be applied to the payment
             of the principal and interest then due and unpaid upon the
             Bonds, with interest on overdue interest and principal, as
             aforesaid, without preference or priority of principal over
             interest or of interest over principal, or of any installment
             of interest over any other installment of interest, or of any
             Bond over any other Bond, ratably, according to the amounts
             due respectively for principal and interest, to the persons
             entitled thereto without any discrimination or privilege.

               (c) If the principal of all the Bonds shall have become due
             and payable, and if acceleration of the maturity of the Bonds
             by reason of such Event of Default shall thereafter have been
             rescinded and annulled under the provisions of this Article
             IX, then, subject to the provisions of clause (b) of this
             Section 9.10 which shall be applicable in the event that the
             principal of all the Bonds shall later become due and payable,
             the moneys shall be applied in accordance with the provisions
             of clause (a) of this Section 9.10.

             Section 9.11.  Severability of Remedies.  It is the purpose
          and intention of this Article IX to provide rights and remedies
          to the Trustee and the Owners which may be lawfully granted under
          the provisions of the Act, but should any right or remedy herein
          granted be held to be unlawful, the Trustee and the Owners shall
          be entitled, as above set forth, to every other right and remedy
          provided in this Indenture and by law.


                                      ARTICLE X

                TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

             Section 10.01. Acceptance of Trusts.  The Trustee hereby
          accepts and agrees to execute the trusts hereby created, but only
          upon the additional terms set forth in this Article X, to all of
          which the Authority agrees and the respective Owners agree by
          their acceptance of delivery of any of the Bonds.

             Section 10.02. No Responsibility for Recitals.  The recitals,
          statements and representations contained in this Indenture or in
          the Bonds, save only the Trustee's authentication upon the Bonds,
          are not made by the Trustee, and the Trustee does not assume, and
          shall not have, any responsibility or obligation for the
          correctness of any thereof.  The Trustee makes no representation
          as to the validity or sufficiency of this Indenture or the Bonds.

             Section 10.03. Limitations on Liability.  The Trustee may
          execute any of the trusts or powers hereof and perform the duties
          required of it hereunder by or through attorneys, agents,
          receivers, or employees, and shall be entitled to advice of
          counsel concerning all matters of trust and its duty hereunder,
          and the Trustee shall not be answerable for the default or
          misconduct of any such attorney, agent, receiver, or employee
          selected by it with reasonable care.  The Trustee shall not be
          answerable for the exercise of any discretion or power under this
          Indenture or for anything whatsoever in connection with the trust
          created hereby, except only for its own negligence or bad faith.

             Anything in this Indenture to the contrary notwithstanding,
          the Trustee shall in no event be required to expend or risk its
          own funds or otherwise incur personal financial liability in the
          performance of any of its duties or in the exercise of any of its
          rights or powers, if there shall be reasonable grounds for
          believing that the repayment of such funds or adequate indemnity
          against such liability is not reasonably assured to it.

             Section 10.04. Compensation, Expenses and Advances.  The
          Trustee, the Paying Agent and any Co-Paying Agent and the
          Registrar under this Indenture shall be entitled to reasonable
          compensation for their services rendered hereunder (not limited
          by any provision of law regarding the compensation of the trustee
          of an express trust) and to reimbursement for their actual
          out-of-pocket expenses (including counsel fees) reasonably
          incurred in connection therewith except as a result of their
          negligence or bad faith, including, without limitation,
          compensation for any services rendered, and reimbursement for any
          expenses incurred, at and subsequent to the time the Bonds are
          deemed to have been paid in accordance with Article VIII hereof. 
          If the Authority shall fail to perform any of the covenants or
          agreements contained in this Indenture, other than the covenants
          or agreements in respect of the payment of the principal of and
          premium, if any, and interest on the Bonds, the Trustee may, in
          its uncontrolled discretion and without notice to the Owners of
          the Bonds, at any time and from time to time, make advances to
          effect performance of the same on behalf of the Authority, but
          the Trustee shall be under no obligation so to do; and any and
          all such advances may bear interest at a rate per annum not
          exceeding the base rate then in effect for 90-day commercial
          loans by the Trustee or a commercial banking affiliate of the
          Trustee designated as such by the Trustee in the city in which is
          located the Principal Office of the Trustee (or such affiliate,
          as the case may be) to borrowers of the highest credit standing;
          but no such advance shall operate to relieve the Authority from
          any default hereunder.  In Section 5.03 of the Loan Agreement,
          the Company has agreed that it will pay to the Trustee (including
          any predecessor Trustee), the Paying Agent and any Co-Paying
          Agent and the Registrar such compensation and reimbursement of
          expenses and advances, but the Company may, without creating a
          default hereunder, contest in good faith the reasonableness of
          any such services, expenses and advances.  If the Company shall
          have failed to make any payment to the Trustee or any predecessor
          Trustee under Section 5.03 of the Loan Agreement and such failure
          shall have resulted in an Event of Default under the Loan
          Agreement, the Trustee, and any predecessor Trustee, shall have,
          in addition to any other rights hereunder, a claim, prior to the
          claim of the Owners, for the payment of its compensation and the
          reimbursement of its expenses and any advances made by it, as
          provided in this Section 10.04, upon the moneys and obligations
          in the Bond Fund; provided, however, that neither the Trustee nor
          any predecessor Trustee shall have any such claim upon moneys or
          obligations deposited with or paid to the Trustee for the
          redemption or payment of Bonds which are deemed to have been paid
          in accordance with Article VIII hereof.

             In Section 5.04 of the Loan Agreement, the Company has agreed
          to indemnify the Trustee and any predecessor Trustee to the
          extent provided therein.

             Section 10.05. Notice of Events of Default.  The Trustee shall
          not be required to take notice, or be deemed to have notice, of
          any default or Event of Default under this Indenture other than
          an Event of Default under clause (a) or (b) of the first
          paragraph of Section 9.01 hereof, unless an officer assigned by
          the Trustee to administer its corporate trust business has been
          specifically notified in writing of such default or Event of
          Default by Owners of at least 33% in principal amount of the
          Bonds then Outstanding.  The Trustee may, however, at any time,
          in its discretion, require of the Authority and the Company full
          information and advice as to the performance of any of the
          covenants, conditions and agreements contained herein.

             Section 10.06. Action by Trustee.  The Trustee shall be under
          no obligation to take any action in respect of any default or
          Event of Default hereunder or toward the execution or enforcement
          of any of the trusts hereby created, or to institute, appear in
          or defend any suit or other proceeding in connection therewith,
          unless requested in writing so to do by Owners of at least a
          majority in principal amount of the Bonds then Outstanding, and,
          if in its opinion such action may tend to involve it in expense
          or liability, unless furnished, from time to time as often as it
          may require, with security and indemnity satisfactory to it.  The
          foregoing provisions are intended only for the protection of the
          Trustee, and shall not affect any discretion or power given by
          any provisions of this Indenture to the Trustee to take action in
          respect of any default or Event of Default without such notice or
          request from the Owners of the Bonds, or without such security or
          indemnity.

             Section 10.07. Good Faith Reliance.  The Trustee shall be
          protected and shall incur no liability in acting or proceeding in
          good faith upon any resolution, notice, telegram, telex,
          facsimile transmission, request, consent, waiver, certificate,
          statement, affidavit, voucher, bond, requisition or other paper
          or document which it shall in good faith believe to be genuine
          and to have been passed or signed by the proper board, body or
          person or to have been prepared and furnished pursuant to any of
          the provisions of this Indenture or the Loan Agreement, or upon
          the written opinion of any attorney, engineer, accountant or
          other expert believed by the Trustee to be qualified in relation
          to the subject matter, and the Trustee shall be under no duty to
          make any investigation or inquiry as to any statements contained
          or matters referred to in any such instrument, but may accept and
          rely upon the same as conclusive evidence of the truth and
          accuracy of such statements.  Neither the Trustee, the Paying
          Agent, any Co-Paying Agent nor the Registrar shall be bound to
          recognize any person as an Owner of a Bond or to take any action
          at his request unless the ownership of such Bond is proved as
          contemplated in Section 11.01 hereof.

             Section 10.08. Dealings in Bonds and with the Authority and
          the Company.  The Trustee, the Paying Agent, any Co-Paying Agent
          or the Registrar, in its individual or any other capacity, may in
          good faith buy, sell, own, hold and deal in any of the Bonds
          issued hereunder, and may join in any action which any Owner of a
          Bond may be entitled to take with like effect as if it did not
          act in any capacity hereunder.  The Trustee, the Paying Agent,
          any Co-Paying Agent or the Registrar, in its individual or any
          other capacity, either as principal or agent, may also engage in
          or be interested in any financial or other transaction with the
          Authority or the Company, and may act as depositary, trustee, or
          agent for any committee or body of Owners of Bonds secured hereby
          or other obligations of the Authority as freely as if it did not
          act in any capacity hereunder.

             Section 10.09. Allowance of Interest.  The Trustee may, but
          shall not be obligated to, allow and credit interest upon any
          moneys which it may at any time receive under any of the
          provisions of this Indenture, at such rate, if any, as it
          customarily allows upon similar funds of similar size and under
          similar conditions.  All interest allowed on any such moneys
          shall be credited as provided in Articles IV and V with respect
          to interest on investments.

             Section 10.10. Construction of Indenture.  The Trustee may
          construe any of the provisions of this Indenture insofar as the
          same may appear to be ambiguous or inconsistent with any other
          provision hereof, and any construction of any such provisions
          hereof by the Trustee in good faith shall be binding upon the
          Owners of the Bonds.

             Section 10.11. Resignation of Trustee.  The Trustee may resign
          and be discharged of the trusts created by this Indenture by
          executing an instrument in writing resigning such trust and
          specifying the date when such resignation shall take effect, and
          filing the same with the President of the Authority and with the
          Company, not less than forty-five (45) days before the date
          specified in such instrument when such resignation shall take
          effect, and by giving notice of such resignation by Mail to all
          Owners of Bonds.  Such resignation shall take effect on the later
          to occur of (i) the day specified in such instrument and notice,
          unless previously a successor Trustee shall have been appointed
          as hereinafter provided, in which event such resignation shall
          take effect immediately upon the appointment of such successor
          Trustee and (ii) the appointment of a successor Trustee.

             So long as no event which is, or after notice or lapse of
          time, or both, would become, an Event of Default shall have
          occurred and be continuing, if the Authority shall have delivered
          to the Trustee (i) an instrument appointing a successor Trustee,
          effective as of a date specified therein and (ii) an instrument
          of acceptance of such appointment, effective as of such date, by
          such successor Trustee in accordance with Section 10.16, the
          Trustee shall be deemed to have resigned as contemplated in this
          Section, the successor Trustee shall be deemed to have been
          appointed pursuant to subsection (b) of Section 10.13 and such
          appointment shall be deemed to have been accepted as contemplated
          in Section 10.16, all as of such date, and all other provisions
          of this Article X shall be applicable to such resignation,
          appointment and acceptance except to the extent inconsistent with
          this paragraph.  The Authority shall deliver any such instrument
          of appointment at the direction of the Company.

             Section 10.12. Removal of Trustee.  The Trustee may be removed
          at any time by filing with the Trustee so removed, and with the
          Authority and the Company, an instrument or instruments in
          writing, appointing a successor, or an instrument or instruments
          in writing, consenting to the appointment by the Authority (at
          the direction of the Company) of a successor and accompanied by
          an instrument of appointment by the Authority (at the direction
          of the Company) of such successor, and in any event executed by
          Owners of not less than a majority in principal amount of the
          Bonds then Outstanding, such filing to be made by any Owner of a
          Bond or his duly authorized attorney.

             Section 10.13. Appointment of Successor Trustee.  (a) In case
          at any time the Trustee shall be removed, or be dissolved, or if
          its property or affairs shall be taken under the control of any
          state or federal court or administrative body because of
          insolvency or bankruptcy, or for any other reason, then a vacancy
          shall forthwith and ipso facto exist and a successor may be
          appointed, and in case at any time the Trustee shall resign or be
          deemed to have resigned, then a successor may be appointed, by
          filing with the Authority and the Company an instrument in
          writing appointing such successor Trustee executed by Owners of
          not less than a majority in principal amount of Bonds then
          Outstanding.  Copies of such instrument shall be promptly
          delivered by the Authority to the predecessor Trustee, to the
          Trustee so appointed and the Company.

               (b)  Until a successor Trustee shall be appointed by the
             Owners of the Bonds as herein authorized, the Authority, shall
             appoint a successor Trustee as directed by the Company.  After
             any appointment by the Authority, it shall cause notice of
             such appointment to be given by Mail to all Owners of Bonds. 
             Any new Trustee so appointed by the Authority shall
             immediately and without further act be superseded by a Trustee
             appointed by the Owners of the Bonds in the manner above
             provided.

               (c)  No resignation or removal of the Trustee and no
             appointment of a successor Trustee pursuant to this Article
             shall become effective until the acceptance of appointment by
             the successor Trustee.

             Section 10.14. Qualifications of Successor Trustee.  Every
          successor Trustee (a) shall be a bank or trust company duly
          organized under the laws of the United States or any state or
          territory thereof authorized by law to perform all the duties
          imposed upon it by this Indenture and (b) shall have (or the
          parent holding company of which shall have) a combined capital
          stock, surplus and undivided profits of at least $100,000,000 if
          there can be located, with reasonable effort, such an institution
          willing and able to accept the trust on reasonable and customary
          terms.

             Section 10.15. Judicial Appointment of Successor Trustee.  In
          case at any time the Trustee shall resign and no appointment of a
          successor Trustee shall be made pursuant to the foregoing
          provisions of this Article X prior to the date specified in the
          notice of resignation as the date when such resignation is to
          take effect, the retiring Trustee may forthwith apply to a court
          of competent jurisdiction for the appointment of a successor
          Trustee.  If no appointment of a successor Trustee shall be made
          pursuant to the foregoing provisions of this Article X within six
          months after a vacancy shall have occurred in the office of
          Trustee, any Owner of a Bond may apply to any court of competent
          jurisdiction to appoint a successor Trustee.  Such court may
          thereupon, after such notice, if any, as it may deem proper and
          prescribe, appoint a successor Trustee.

             Section 10.16. Acceptance of Trusts by Successor Trustee.  Any
          successor Trustee appointed hereunder shall execute, acknowledge
          and deliver to the Authority an instrument accepting such
          appointment hereunder, and thereupon such successor Trustee,
          without any further act, deed or conveyance, shall become duly
          vested with all the estates, property, rights, powers, trusts,
          duties and obligations of its predecessor in the trust hereunder,
          with like effect as if originally named Trustee herein.  Upon
          request of such Trustee, such predecessor Trustee and the
          Authority shall execute and deliver an instrument transferring to
          such successor Trustee all the estates, property, rights, powers
          and trusts hereunder of such predecessor Trustee and, subject to
          the provisions of Section 10.04 hereof, such predecessor Trustee
          shall pay over to the successor Trustee all moneys and other
          assets at the time held by it hereunder.

             Section 10.17. Successor by Merger or Consolidation.  Any
          corporation or association into which any Trustee hereunder may
          be merged or converted or with which it may be consolidated, or
          any corporation or association resulting from any merger or
          consolidation to which any Trustee hereunder shall be a party or
          any corporation or association succeeding to the corporate trust
          business of the Trustee, shall be the successor Trustee under
          this Indenture, without the execution or filing of any paper or
          any further act on the part of the parties hereto, anything in
          this Indenture to the contrary notwithstanding.

             If, at the time any such successor to the Trustee shall
          succeed to the trusts created by this Indenture, any of the Bonds
          shall have been authenticated but not delivered, such successor
          Trustee may adopt the certificate of authentication of any
          predecessor Trustee and deliver such Bonds so authenticated; and
          if at that time, any of the Bonds shall not have been
          authenticated, such successor Trustee may authenticate such Bonds
          either in the name of any such predecessor hereunder or in the
          name of such successor; and, in all such cases, such certificate
          of authentication shall have the full force which it is anywhere
          in the Bonds or in this Indenture provided that the certificate
          of authentication of the Trustee shall have; provided, however,
          that the right to adopt the certificate of authentication of any
          predecessor Trustee or to authenticate Bonds in the name of any
          predecessor Trustee shall apply only to its successor or
          successors by merger, conversion or consolidation.

             Section 10.18. Standard of Care.  Notwithstanding any other
          provisions of this Article X, the Trustee shall, during the
          existence of an Event of Default of which the Trustee has actual
          notice, exercise such of the rights and powers vested in it by
          this Indenture and use the same degree of skill and care in their
          exercise as a prudent man would use and exercise under the
          circumstances in the conduct of his own affairs.

             Section 10.19. Notice to Owners of Bonds of Event of Default. 
          If an Event of Default occurs of which the Trustee by Section
          10.05 hereof is required to take notice and deemed to have
          notice, or any other Event of Default occurs of which the Trustee
          has been specifically notified in accordance with Section 10.05
          hereof, and any such Event of Default shall continue for at least
          two days after the Trustee acquires actual notice thereof, unless
          the Trustee shall have theretofore given a notice of acceleration
          pursuant to Section 9.01 hereof, the Trustee shall give Notice by
          Mail to all Owners of Outstanding Bonds.

             Section 10.20. Intervention in Litigation of the Authority. 
          In any judicial proceeding to which the Authority is a party and
          which in the opinion of the Trustee and its counsel has a
          substantial bearing on the interests of the Owners of Bonds, the
          Trustee may intervene on behalf of the Owners of the Bonds and
          shall, upon receipt of indemnity satisfactory to it, do so if
          requested in writing by Owners of at least a majority in
          principal amount of the Bonds then Outstanding if permitted by
          the court having jurisdiction in the premises.

             Section 10.21. Paying Agent; Co-Paying Agents.  The Authority
          shall, with the approval of the Company, appoint the Paying Agent
          for the Bonds and may at any time or from time to time, with the
          approval of the Company, appoint one or more Co-Paying Agents for
          the Bonds, subject to the conditions set forth in Section 10.22
          hereof.  The Paying Agent and each Co-Paying Agent shall
          designate to the Trustee its Principal Office and signify its
          acceptance of the duties and obligations imposed upon it
          hereunder by a written instrument of acceptance delivered to the
          Authority and the Trustee in which such Paying Agent or Co-Paying
          Agent will agree, particularly:

               (a) to hold all sums held by it for the payment of the
             principal of and premium, if any, or interest on Bonds in
             trust for the benefit of the Owners of the Bonds until such
             sums shall be paid to such Owners or otherwise disposed of as
             herein provided;

               (b) to keep such books and records as shall be consistent
             with prudent industry practice, to make such books and records
             available for inspection by the Authority, the Trustee and the
             Company at all reasonable times and, in the case of a
             Co-Paying Agent, to promptly furnish copies of such books and
             records to the Paying Agent; and

               (c) in the case of a Co-Paying Agent, upon the request of
             the Paying Agent, to forthwith deliver to the Paying Agent all
             sums so held in trust by such Co-Paying Agent.

             The Authority shall cooperate with the Trustee and the Company
          to cause the necessary arrangements to be made and to be
          thereafter continued whereby funds derived from the sources
          specified in Sections 4.03 and 4.04 hereof will be made available
          to the Paying Agent and each Co-Paying Agent for the payment when
          due of the principal of, premium, if any, and interest on the
          Bonds.

             Section 10.22. Qualifications of Paying Agent and Co-Paying
          Agents; Resignation; Removal.  The Paying Agent and any Co-Paying
          Agent shall be a corporation or association duly organized under
          the laws of the United States of America or any state or
          territory thereof, having a combined capital stock, surplus and
          undivided profits of at least $15,000,000 and authorized by law
          to perform all the duties imposed upon it by this Indenture.  The
          Paying Agent and any Co-Paying Agent may at any time resign and
          be discharged of the duties and obligations created by this
          Indenture by giving at least sixty (60) days' notice to the
          Authority, the Company and the Trustee.  The Paying Agent and any
          Co-Paying Agent may be removed at any time, at the direction of
          the Company, by an instrument, signed by the Authority, filed
          with the Paying Agent or such Co-Paying Agent, as the case may
          be, and with the Trustee.

             In the event of the resignation or removal of the Paying Agent
          or any Co-Paying Agent, the Paying Agent or such Co-Paying Agent,
          as the case may be, shall pay over, assign and deliver any moneys
          held by it in such capacity to its successor or, if there be no
          successor, to the Trustee.

             In the event that the Authority shall fail to appoint a Paying
          Agent hereunder, or in the event that the Paying Agent shall
          resign or be removed, or be dissolved, or if the property or
          affairs of the Paying Agent shall be taken under the control of
          any state or federal court or administrative body because of
          bankruptcy or insolvency, or for any other reason, and the
          Authority shall not have appointed its successor as Paying Agent,
          the Trustee shall ipso facto be deemed to be the Paying Agent for
          all purposes of this Indenture until the appointment by the
          Authority of the Paying Agent or successor Paying Agent, as the
          case may be.

             Upon the appointment of a successor Paying Agent, the Trustee
          shall give notice thereof by Mail to all Owners of Bonds.

             Section 10.23. Registrar.  The Authority shall, with the
          approval of the Company, appoint the Registrar for the Bonds,
          subject to the conditions set forth in Section 10.24 hereof.  The
          Registrar shall designate to the Trustee its Principal Office and
          signify its acceptance of the duties imposed upon it hereunder by
          a written instrument of acceptance delivered to the Authority and
          the Trustee in which such Registrar will agree, particularly, to
          keep such books and records as shall be consistent with prudent
          industry practice and to make such books and records available
          for inspection by the Authority, the Trustee and the Company at
          all reasonable times.

             The Authority shall cooperate with the Trustee and the Company
          to cause the necessary arrangements to be made and to be
          thereafter continued whereby Bonds, executed by the Authority and
          authenticated by the Trustee, shall be made available for
          exchange, registration and registration of transfer at the
          Principal Office of the Registrar.  The Authority shall cooperate
          with the Trustee, the Registrar and the Company to cause the
          necessary arrangements to be made and thereafter continued
          whereby the Paying Agent and any Co-Paying Agent shall be
          furnished such records and other information, at such times, as
          shall be required to enable the Paying Agent and such Co-Paying
          Agent to perform the duties and obligations imposed upon them
          hereunder.

             Section 10.24. Qualifications of Registrar; Resignation;
          Removal.  The Registrar shall be a corporation or association
          duly organized under the laws of the United States of America or
          any state or territory thereof, having a combined capital stock,
          surplus and undivided profits of at least $15,000,000 and
          authorized by law to perform all the duties imposed upon it by
          this Indenture.  The Registrar may at any time resign and be
          discharged of the duties and obligations created by this
          Indenture by giving at least sixty (60) days' notice to the
          Authority, the Trustee and the Company.  The Registrar may be
          removed at any time, at the direction of the Company, by an
          instrument signed by the Authority filed with the Registrar and
          the Trustee.

             In the event of the resignation or removal of the Registrar,
          the Registrar shall deliver any Bonds held by it in such capacity
          to its successor or, if there be no successor, to the Trustee.

             In the event that the Authority shall fail to appoint a
          Registrar hereunder, or in the event that the Registrar shall
          resign or be removed, or be dissolved, or if the property or
          affairs of the Registrar shall be taken under the control of any
          state or federal court or administrative body because of
          bankruptcy or insolvency, or for any other reason, and the
          Authority shall not have appointed its successor as Registrar,
          the Trustee shall ipso facto be deemed to be the Registrar for
          all purposes of this Indenture until the appointment by the
          Authority of the Registrar or successor Registrar, as the case
          may be.

             Upon the appointment of a successor Registrar, the Trustee
          shall give notice thereof by Mail to all Owners of Bonds.

             Section 10.25. Several Capacities.  Anything herein to the
          contrary notwithstanding, the same entity may serve hereunder as
          the Trustee, the Paying Agent or a Co-Paying Agent and the
          Registrar, and in any combination of such capacities to the
          extent permitted by law.


                                      ARTICLE XI

                   EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                             PROOF OF OWNERSHIP OF BONDS

             Section 11.01. Execution of Instruments; Proof of Ownership. 
          Any request, direction, consent or other instrument in writing,
          whether or not required or permitted by this Indenture to be
          signed or executed by Owners of the Bonds, may be in any number
          of concurrent instruments of similar tenor and may be signed or
          executed by Owners of the Bonds or by an agent appointed by an
          instrument in writing.  Proof of the execution of any such
          instrument and of the ownership of Bonds shall be sufficient for
          any purpose of this Indenture and shall be conclusive in favor of
          the Trustee with regard to any action taken by it under such
          instrument if made in the following manner:

               (a) The fact and date of the execution by any person of any
             such instrument may be proved by the certificate of any
             officer in any jurisdiction who, by the laws thereof, has
             power to take acknowledgments within such jurisdiction, to the
             effect that the person signing such instrument acknowledged
             before him the execution thereof, or by an affidavit of a
             witness to such execution.

               (b) The ownership or former ownership of Bonds shall be
             proved by the registration books kept under the provisions of
             Section 2.08 hereof.

             Nothing contained in this Article XI shall be construed as
          limiting the Trustee to such proof, it being intended that the
          Trustee may accept any other evidence of matters herein stated
          which it may deem sufficient.  Any request or consent of any
          Owner of a Bond shall bind every future Owner of the same Bond or
          any Bond or Bonds issued in lieu thereof in respect of anything
          done by the Trustee or the Authority in pursuance of such request
          or consent.


                                     ARTICLE XII

                MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

             Section 12.01. Limitations.  Neither this Indenture nor the
          Loan Agreement shall be modified or amended in any respect
          subsequent to the original issuance of the Bonds except as
          provided in and in accordance with and subject to the provisions
          of this Article XII and Section 7.04 hereof.

             The Trustee may, but shall not be obligated to, enter into any
          Supplemental Indenture which affects the Trustee's own rights,
          duties or immunities under this Indenture or otherwise.

             Section 12.02. Supplemental Indentures without Owner Consent. 
          The Authority and the Trustee may, from time to time and at any
          time, without the consent of or notice to the Owners of the
          Bonds, enter into Supplemental Indentures as follows:

               (a) to cure any formal defect, omission, inconsistency or
             ambiguity in this Indenture, provided, however, that such cure
             shall not materially and adversely affect the interests of the
             Owners of the Bonds;

               (b) to grant to or confer or impose upon the Trustee for the
             benefit of the Owners of the Bonds any additional rights,
             remedies, powers, authority, security, liabilities or duties
             which may lawfully be granted, conferred or imposed;

               (c) to add to the covenants and agreements of, and
             limitations and restrictions upon, the Authority in this
             Indenture other covenants, agreements, limitations and
             restrictions to be observed by the Authority;

               (d) to confirm, as further assurance, any pledge under, and
             the subjection to any claim, lien or pledge created or to be
             created by, this Indenture, of the Receipts and Revenues of
             the Authority from the Loan Agreement or of any other moneys,
             securities or funds;

               (e) to authorize a different denomination or denominations
             of the Bonds and to make correlative amendments and
             modifications to this Indenture regarding exchange ability of
             Bonds of different denominations, redemptions of portions of
             Bonds of particular denominations and similar amendments and
             modifications of a technical nature;

               (f) to modify, alter, supplement or amend this Indenture in
             such manner as shall permit the qualification hereof under the
             Trust Indenture Act of 1939, as from time to time amended;

               (g) to modify, alter, supplement or amend this Indenture in
             such manner as shall be necessary, desirable or appropriate in
             order to provide for or eliminate the registration and
             registration of transfer of the Bonds through a book-entry or
             similar method, whether or not the Bonds are evidenced by
             certificates;

               (h) to modify, alter, amend or supplement this Indenture in
             any other respect which is not materially adverse to the
             Owners and which does not involve a change described in clause
             (i), (ii), (iii) or (iv) of Section 12.03(a) hereof; and

               (i) to provide any additional procedures, covenants or
             agreements necessary or desirable to maintain the tax-exempt
             status of interest on the Bonds.

             Before the Authority and the Trustee shall enter into any
          Supplemental Indenture pursuant to this Section 12.02, there
          shall have been delivered to the Trustee an opinion of Bond
          Counsel stating that such Supplemental Indenture is authorized or
          permitted by this Indenture and the Act, complies with their
          respective terms, will, upon the execution and delivery thereof,
          be valid and binding upon the Authority in accordance with its
          terms and will not, in and of itself, adversely affect the
          exclusion from gross income for federal tax purposes of the
          interest on the Bonds.

             Section 12.03. Supplemental Indentures with Consent of Owners. 
          (a) Except for any Supplemental Indenture entered into pursuant
          to Section 12.02 hereof, subject to the terms and provisions
          contained in this Section 12.03 and Section 12.05 and not
          otherwise, Owners of not less than a majority in aggregate
          principal amount of the Bonds then Outstanding which would be
          adversely affected thereby shall have the right from time to time
          to consent to and approve the execution and delivery by the
          Authority and the Trustee of any Supplemental Indenture deemed
          necessary or desirable by the Authority for the purposes of
          modifying, altering, amending, supplementing or rescinding, in
          any particular, any of the terms or provisions contained in this
          Indenture; provided, however, that, unless approved in writing by
          the Owners of all the Bonds then Outstanding which would be
          adversely affected thereby, nothing herein contained shall
          permit, or be construed as permitting, (i) a change in the times,
          amounts or currency of payment of the principal of or premium, if
          any, or interest on any Outstanding Bond, a reduction in the
          principal amount or redemption price of any Outstanding Bond or a
          change in the rate of interest thereon, or any impairment of the
          right of any Owner to institute suit for the payment of any Bond
          owned by it, or (ii) the creation of a claim or lien upon, or a
          pledge of, the Receipts and Revenues of the Authority from the
          Loan Agreement ranking prior to or on a parity with the claim,
          lien or pledge created by this Indenture (except as referred to
          in Section 10.04 hereof), or (iii) a preference or priority of
          any Bond or Bonds over any other Bond or Bonds, or (iv) a
          reduction in the aggregate principal amount of Bonds the consent
          of the Owners of which is required for any such Supplemental
          Indenture or which is required, under Section 12.07 hereof, for
          any modification, alteration, amendment or supplement to the Loan
          Agreement.

               (b) If at any time the Authority shall request the Trustee
             to enter into any Supplemental Indenture for any of the
             purposes of this Section 12.03, the Trustee shall cause notice
             of the proposed Supplemental Indenture to be given by Mail to
             all Owners of Outstanding Bonds.  Such notice shall briefly
             set forth the nature of the proposed Supplemental Indenture
             and shall state that a copy thereof is on file at the
             Principal Office of the Trustee for inspection by all Owners
             of Bonds.

               (c) Within two years after the date of the first mailing of
             such notice, the Authority and the Trustee may enter into such
             Supplemental Indenture in substantially the form described in
             such notice only if there shall have first been delivered to
             the Trustee (i) the required consents, in writing, of Owners
             of Bonds and (ii) an opinion of Bond Counsel stating that such
             Supplemental Indenture is authorized or permitted by this
             Indenture and the Act, complies with their respective terms
             and, upon the execution and delivery thereof, will be valid
             and binding upon the Authority in accordance with its terms
             and will not, in and of itself, adversely affect the exclusion
             from gross income for federal tax purposes of the interest on
             the Bonds.

               (d) If Owners of not less than the percentage of Bonds
             required by this Section 12.03 shall have consented to and
             approved the execution and delivery thereof as herein
             provided, no Owner shall have any right to object to the
             execution and delivery of such Supplemental Indenture, or to
             object to any of the terms and provisions contained therein or
             the operation thereof, or in any manner to question the
             propriety of the execution and delivery thereof, or to enjoin
             or restrain the Authority or the Trustee from executing and
             delivering the same or from taking any action pursuant to the
             provisions thereof.

             Section 12.04. Effect of Supplemental Indenture.  Upon the
          execution and delivery of any Supplemental Indenture pursuant to
          the provisions of this Article XII, this Indenture shall be, and
          be deemed to be, modified, altered, amended or supplemented in
          accordance therewith, and the respective rights, duties and
          obligations under this Indenture of the Authority, the Trustee
          and Owners of all Bonds then Outstanding shall thereafter be
          determined, exercised and enforced under this Indenture subject
          in all respects to such modifications, alterations, amendments
          and supplements.

             Section 12.05. Consent of the Company.  Anything herein to the
          contrary notwithstanding, any Supplemental Indenture under this
          Article XII which affects any rights, powers, agreements or
          obligations of the Company under the Loan Agreement or requires a
          revision of the Loan Agreement shall not become effective unless
          and until the Company shall have consented to such Supplemental
          Indenture.

             Section 12.06. Amendment of Loan Agreement without Consent of
          Owners.  Without the consent of or notice to the Owners of the
          Bonds, the Authority may enter into any Supplemental Loan
          Agreement, and the Trustee may consent thereto, as may be
          required (a) by the provisions of the Loan Agreement and this
          Indenture, (b) for the purpose of curing any formal defect,
          omission, inconsistency or ambiguity therein, (c) to provide any
          additional procedures, covenants or agreements necessary or
          desirable to maintain the tax-exempt status of interest on the
          Bonds, or (d) in connection with any other change therein which
          is not materially adverse to the Owners of the Bonds.  A revision
          of Exhibit A to the Loan Agreement pursuant to Section 3.03
          thereof, shall not be deemed a Supplemental Loan Agreement for
          purposes of this Indenture.

             Before the Authority shall enter into, and the Trustee shall
          consent to, any Supplemental Loan Agreement pursuant to this
          Section 12.06, there shall have been delivered to the Trustee an
          opinion of Bond Counsel stating that such Supplemental Loan
          Agreement is authorized or permitted by this Indenture and the
          Act, complies with their respective terms, will, upon the
          execution and delivery thereof, be valid and binding upon the
          Authority and the Company in accordance with its terms and will
          not, in and of itself, adversely affect the exclusion from gross
          income for federal tax purposes of interest on the Bonds.

             Section 12.07. Amendment of Loan Agreement with Consent of
          Owners.  Except in the case of Supplemental Loan Agreements
          referred to in Section 12.06 hereof, the Authority shall not
          enter into, and the Trustee shall not consent to, any
          Supplemental Loan Agreement without the written approval or
          consent of the Owners of not less than a majority in aggregate
          principal amount of the Bonds then Outstanding which would be
          adversely affected thereby, given and procured as provided in
          Section 12.03 hereof; provided, however, that, unless approved in
          writing by the Owners of all Bonds then Outstanding which would
          be adversely affected thereby, nothing herein contained shall
          permit, or be construed as permitting, a change in the
          obligations of the Company under Section 5.01 of the Loan
          Agreement.  If at any time the Authority or the Company shall
          request the consent of the Trustee to any such proposed
          Supplemental Loan Agreement, the Trustee shall cause notice of
          such proposed Supplemental Loan Agreement to be given in the same
          manner as provided by Section 12.03 hereof with respect to
          Supplemental Indentures.  Such notice shall briefly set forth the
          nature of such proposed Supplemental Loan Agreement and shall
          state that copies of the instrument embodying the same are on
          file at the Principal Office of the Trustee for inspection by all
          Owners of the Bonds.  The Authority may enter into, and the
          Trustee may consent to, any such proposed Supplemental Loan
          Agreement subject to the same conditions, and with the same
          effect, as provided by Section 12.03 hereof with respect to
          Supplemental Indentures.


                                     ARTICLE XIII

                                    MISCELLANEOUS

             Section 13.01. Successors of the Authority.  In the event of
          the dissolution of the Authority, all the covenants,
          stipulations, promises and agreements in this Indenture
          contained, by or on behalf of, or for the benefit of, the
          Authority, shall bind or inure to the benefit of the successors
          of the Authority from time to time and any entity, officer,
          board, commission, agency or instrumentality to whom or to which
          any power or duty of the Authority shall be transferred.

             Section 13.02. Parties in Interest.  Except as herein
          otherwise specifically provided, nothing in this Indenture
          expressed or implied is intended or shall be construed to confer
          upon any person, firm or corporation other than the Authority,
          the Company and the Trustee and their successors and assigns and
          the Owners of the Bonds any right, remedy or claim under or by
          reason of this Indenture, this Indenture being intended to be for
          the sole and exclusive benefit of the Authority, the Company and
          the Trustee and their successors and assigns and the Owners of
          the Bonds.

             Section 13.03. Severability.  In case any one or more of the
          provisions of this Indenture or of the Loan Agreement or of the
          Bonds shall, for any reason, be held to be illegal or invalid,
          such illegality or invalidity shall not affect any other
          provisions of this Indenture or of the Loan Agreement or of such
          Bonds, and this Indenture and the Loan Agreement and such Bonds
          shall be construed and enforced as if such illegal or invalid
          provisions had not been contained herein or therein.

             Section 13.04. No Personal Liability of Authority Officials. 
          No covenant or agreement contained in the Bonds or in this
          Indenture shall be deemed to be the covenant or agreement of any
          director, official, officer, agent, or employee of the Authority
          in his individual capacity, and neither the members of the Board
          of Directors of the Authority nor any official executing the
          Bonds shall be liable personally on the Bonds or be subject to
          any personal liability or accountability by reason of the
          issuance thereof.

             Section 13.05. Bonds Owned by the Authority or the Company. 
          In determining whether Owners of the requisite aggregate
          principal amount of the Bonds have concurred in any direction,
          consent or waiver under this Indenture, Bonds which are owned by
          the Authority or the Company or by any person directly or
          indirectly controlling or controlled by or under direct or
          indirect common control with the Company (unless the Authority,
          the Company or such person owns all Bonds which are then
          Outstanding, determined without regard to this Section 13.05)
          shall be disregarded and deemed not to be Outstanding for the
          purpose of any such determination, except that, for the purpose
          of determining whether the Trustee shall be protected in relying
          on any such direction, consent or waiver, only Bonds which the
          Trustee knows are so owned shall be so disregarded.  Upon the
          request of the Trustee, the Company and the Authority shall
          furnish to the Trustee a certificate identifying all Bonds, if
          any, actually known to either of them to be owned or held by or
          for the account of any of the above-described persons, and the
          Trustee shall be entitled to rely on such certificate as
          conclusive evidence of the facts set forth therein and that all
          other Bonds are Outstanding for the purposes of such
          determination.  Bonds so owned which have been pledged in good
          faith may be regarded as Outstanding if the pledgee establishes
          to the satisfaction of the Trustee the pledgee's right so to act
          with respect to such Bonds and that the pledgee is not the
          Authority or the Company or any person directly or indirectly
          controlling or controlled by or under direct or indirect common
          control with the Company.  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.

             Section 13.06. Counterparts.  This Indenture may be executed
          in any number of counterparts, each of which, when so executed
          and delivered, shall be an original; but such counterparts shall
          together constitute but one and the same Indenture.

             Section 13.07. Governing Law.  The laws of the State of
          Arizona shall govern the construction and enforcement of this
          Indenture and of all Bonds, except that the laws of the State of
          New York shall govern the construction and enforcement of the
          rights and duties of the Trustee hereunder and the construction
          of Section 13.09 hereof and the computation of any period of
          grace provided herein.

             Section 13.08. Notices.  Except as otherwise provided in this
          Indenture, all notices, certificates, requests requisitions or
          other communications by the Authority, the Company, the Trustee,
          the Paying Agent, any Co-Paying Agent or the Registrar pursuant
          to this Indenture shall be in writing and shall be sufficiently
          given and shall be deemed given when mailed by registered mail,
          postage prepaid, addressed as follows: If to the Authority, c/o
          Russo, Cox & Russo, P.C., 1820 East River Road, Suite 230,
          Tucson, Arizona 85718; if to the Company, at 220 West Sixth
          Street, Tucson, Arizona 85702, Attention: Treasurer; if to the
          Trustee, at 100 Wall Street, Suite 1600, New York, New York
          10005, Attention: Vice President; if to the Paying Agent, any
          Co-Paying Agent or the Registrar, at the address designated in
          the acceptance of appointment or engagement.  Any of the
          foregoing may, by notice given hereunder to each of the others,
          designate any further or different addresses to which subsequent
          notices, certificates, requests or other communications shall be
          sent hereunder.

             Section 13.09. Holidays.  If the date for making any payment
          or the last date for performance of any act or the exercising of
          any right, as provided in this Indenture, shall be a Saturday,
          Sunday or a public holiday in the city in which is located the
          Principal Office of the Trustee, such payment may be made or act
          performed or right exercised on the next succeeding business day,
          with the same force and effect as if done on the nominal date
          provided in this Indenture, and no interest shall accrue for the
          period after such nominal date.  If the last day of any period of
          grace, as provided in this Indenture, shall be a Saturday, Sunday
          or a public holiday in the city in which is located the Principal
          Office of the Trustee, the last day of such period of grace shall
          be deemed to be the next succeeding business day.

             Section 13.10. Statutory Notice Regarding Cancellation of
          Contracts.  As required by the provisions of Section 38-511,
          Arizona Revised Statutes, as amended, notice is hereby given that
          political subdivisions of the State of Arizona or any of their
          departments or agencies may, within three (3) years of its
          execution, cancel any contract, without penalty or further
          obligation, made by the political subdivisions or any of their
          departments or agencies on or after September 30, 1988, if any
          person significantly involved in initiating, negotiating,
          securing, drafting or creating the contract on behalf of the
          political subdivisions or any of their departments or agencies
          is, at any time while the contract or any extension of the
          contact is in effect, an employee or agent of any other party to
          the contract in any capacity or a consultant to any other party
          of the contract with respect to the subject matter of the
          contract.

             The Trustee covenants and agrees not to employ as an employee,
          agent or, with respect to the subject matter of this Indenture, a
          consultant, any person actually known by the Trustee to be
          significantly involved in initiating, negotiating, securing,
          drafting or creating such Indenture on behalf of the Authority
          within three (3) years from the execution hereof, unless a waiver
          is provided by the Authority.


     <PAGE>


              IN WITNESS WHEREOF, The Industrial Development Authority of
          the County of Pima has caused this Indenture to be executed by
          its President and First Trust of New York, National Association
          has caused this Indenture to be executed on its behalf by its
          Vice President, all as of the day and year first above written.


                                   THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                   OF THE COUNTY OF PIMA

                                   By:  /s/ Stanley Lehman
                                       ----------------------------------
                                       President



                                   FIRST TRUST OF NEW YORK,
                                   NATIONAL ASSOCIATION



                                   By:  /s/ P.J. Crowley
                                       ----------------------------------
                                       Vice President


     <PAGE>

                                                                  EXHIBIT A

                                    (FORM OF BOND)

          No.


                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA
                         INDUSTRIAL DEVELOPMENT REVENUE BOND,
                                    1997 SERIES A
                       (TUCSON ELECTRIC POWER COMPANY PROJECT)

          INTEREST RATE (PER ANNUM):
          MATURITY DATE:                                    DATED:
          CUSIP:
          REGISTERED OWNER:
          PRINCIPAL AMOUNT:                                 DOLLARS


             The Industrial Development Authority of the County of Pima, an
          Arizona nonprofit corporation designated by law as a political
          subdivision of the State of Arizona (the "Authority"), for value
          received, hereby promises to pay (but only out of the Receipts
          and Revenues of the Authority from the Loan Agreement, as
          hereinafter defined, and other moneys pledged therefor) to the
          Registered Owner identified above or registered assigns, on the
          Maturity Date set forth above, upon the presentation and
          surrender hereof, the Principal Amount set forth above and to pay
          (but only out of the Receipts and Revenues of the Authority from
          the Loan Agreement and other moneys pledged therefor), interest
          on said Principal Amount until payment of said Principal Amount
          has been made or duly provided for, from the date hereof, at the
          Interest Rate set forth above, semi-annually on the first days of
          March and September in each year, commencing March 1, 1998. 
          Interest will be calculated on the basis of a 360-day year of
          twelve 30-day months.

             The principal of and premium, if any, on this Bond are payable
          at the principal office of First Trust of New York, National
          Association, as Paying Agent, or at the principal office of any
          co-paying agent appointed in accordance with the Indenture (as
          hereinafter defined), at the option of the Registered Owner
          hereof.  Interest on this Bond is payable by check drawn upon the
          Paying Agent and mailed to the Registered Owner of this Bond as
          of the close of business on the Record Date (as defined in the
          Indenture), at the registered address of such Registered Owner;
          notwithstanding the foregoing, upon request to the Paying Agent
          by a Registered Owner of not less than $1,000,000 in aggregate
          principal amount of Bonds, interest on such Bonds and, after
          presentation and surrender of such Bonds, the principal thereof
          shall be paid to such Registered Owner by wire transfer to the
          account maintained within the continental United States specified
          by such Registered Owner or, if such Registered Owner maintains
          an account with the entity acting as Paying Agent, by deposit
          into such account.  Payment of the principal of and premium, if
          any, and interest on this Bond shall be in any coin or currency
          of the United States of America as, at the respective times of
          payment, shall be legal tender for the payment of public and
          private debts.

             This Bond is one of the duly authorized Industrial Development
          Revenue Bonds, 1997 Series A (Tucson Electric Power Company
          Project) (the "Bonds") of the Authority, aggregating Twenty-two
          Million Four Hundred Sixty Thousand Dollars ($22,460,000) in
          principal amount, issued under and pursuant to the Constitution
          and laws of the State of Arizona, particularly Title 35,
          Chapter 5, Arizona Revised Statutes, as amended (the "Act"), and
          the Indenture of Trust, dated as of September 15, 1997 (the
          "Indenture"), between the Authority and First Trust of New York,
          National Association, as trustee (the "Trustee"), for the purpose
          of financing and refinancing a portion of the costs of the
          acquisition, construction, improvement and equipping of certain
          facilities for the furnishing of electric energy (the
          "Facilities").  Pursuant to the Loan Agreement, dated as of
          September 15, 1997 (the "Loan Agreement"), between the Authority
          and Tucson Electric Power Company, a corporation organized and
          existing under the laws of the State of Arizona (the "Company"),
          the proceeds of the Bonds, other than accrued interest, if any,
          paid by the initial purchasers thereof, will be loaned from time
          to time to the Company.

             Neither Pima County, Arizona nor the State of Arizona shall in
          any event be liable for the payment of the principal of or
          premium, if any, or interest on the Bonds, and neither the Bonds,
          nor the premium, if any, or the interest thereon, shall be
          construed to constitute an indebtedness of Pima County, Arizona
          or the State of Arizona within the meaning of any constitutional
          or statutory provisions whatsoever.  The Bonds and the premium,
          if any, and the interest thereon are limited obligations of the
          Authority payable solely from the Receipts and Revenues of the
          Authority from the Loan Agreement and other moneys pledged
          therefor under the Indenture.

             The Bonds are equally and ratably secured, to the extent
          provided in the Indenture, by the pledge thereunder of the
          "Receipts and Revenues of the Authority from the Loan Agreement",
          which term is used herein as defined in the Indenture and which
          as therein defined means all moneys paid or payable to the
          Trustee for the account of the Authority by the Company in
          respect of the loan payments, including all receipts of the
          Trustee which, under the provisions of the Indenture, reduce the
          amounts of such payments. The Authority has also pledged and
          assigned to the Trustee as security for the Bonds all other
          rights and interests of the Authority under the Loan Agreement
          (other than its rights to indemnification and its administrative
          expenses and certain other rights).

             The transfer of this Bond shall be registered upon the
          registration books kept at the principal office of First Trust of
          New York, National Association, as Registrar, at the written
          request of the Registered Owner hereof or his attorney duly
          authorized in writing, upon surrender of this Bond at said
          office, together with a written instrument of transfer
          satisfactory to the Registrar duly executed by the Registered
          Owner or his duly authorized attorney.

             In the manner and with the effect provided in the Indenture,
          each of the Bonds may be redeemed prior to maturity, as follows:

               (a)  The Bonds shall be subject to redemption by the
             Authority, at the direction of the Company, on any date on or
             after September 1, 2002 in whole at any time or in part from
             time to time, at the applicable redemption price (expressed as
             a percentage of principal amount) set forth below, plus
             accrued interest to the redemption date:

                       Redemption Period              Redemption Price
                       -----------------              ----------------
           September 1, 2002 through August 31, 2003       102%
           September 1, 2003 through August 31, 2004       101%
           September 1, 2004 and thereafter                100%

               (b)  The Bonds shall be subject to redemption by the
             Authority, at the direction of the Company, in whole at any
             time at the principal amount thereof plus accrued interest to
             the redemption date, if:

                  (i) the Company shall have determined that the continued
               operation of the Facilities is impracticable, uneconomical
               or undesirable for any reason;

                  (ii) all or substantially all of the Facilities shall
               have been condemned or taken by eminent domain; or

                  (iii) the operation of the Facilities shall have been
               enjoined or shall have otherwise been prohibited by, or
               shall conflict with, any order, decree, rule or regulation
               of any court or of any federal, state or local regulatory
               body, administrative agency or other governmental body.

               (c)  The Bonds shall be subject to mandatory redemption by
             the Authority, at the principal amount thereof plus accrued
             interest to the redemption date, on the 180th day (or such
             earlier date as may be designated by the Company) after a
             final determination by a court of competent jurisdiction or an
             administrative agency, to the effect that, as a result of a
             failure by the Company to perform or observe any covenant,
             agreement or representation contained in the Loan Agreement,
             the interest payable on the Bonds is included for federal
             income tax purposes in the gross income of the owners thereof,
             other than any owner of a Bond who is a "substantial user" of
             the Facilities or a "related person" within the meaning of
             Section 147(a) of the Internal Revenue Code of 1986 (the
             "Code").  No determination by any court or administrative
             agency shall be considered final for the purposes of this
             paragraph (c) unless the Company shall have been given timely
             notice of the proceeding which resulted in such determination
             and an opportunity to participate in such proceeding, either
             directly or through an owner of a Bond, and until the
             conclusion of any appellate review sought by any party to such
             proceeding or the expiration of the time for seeking such
             review. The Bonds shall be redeemed either in whole or in part
             in such principal amount that, in the opinion of Bond Counsel,
             the interest payable on the Bonds, including the Bonds
             remaining outstanding after such redemption, would not be
             included in the gross income of any owner thereof, other than
             an owner of a Bond who is a "substantial user" of the
             Facilities or a "related person" within the meaning of Section
             147(a) of the Code.

               (d)  In the event that the aggregate of the amounts, if any,
             of the proceeds of the Bonds remaining unexpended upon the
             completion of the Facilities or upon the termination of the
             acquisition and construction thereof, together with any income
             or other gain from the investment thereof, shall at any time,
             or from time to time, be equal to or greater than $5,000, the
             Authority shall redeem the Bonds, at the principal amount
             thereof plus accrued interest to the redemption date, in the
             largest aggregate principal amount which does not exceed the
             amount of such proceeds together with income or other gain on
             an interest payment date determined as set forth in, and
             otherwise in accordance with the provisions of, the Indenture;
             provided, however, that the Company may direct that such
             proceeds and income be applied to the purchase of the Bonds or
             in any other manner which will not impair the validity of the
             Bonds or the exemption from gross income for federal tax
             purposes of the interest thereon.

             If less than all of the Bonds at the time outstanding are to
          be called for redemption, the particular Bonds or portions of
          Bonds to be redeemed shall be selected by the Trustee, in such
          manner as the Trustee in its discretion may deem proper, in the
          principal amounts designated to the Trustee by the Company or
          otherwise as required by the Indenture.

             In the event any of the Bonds are called for redemption, the
          Trustee shall give notice, in the name of the Authority, of the
          redemption of such Bonds.  Such notice shall be given by mailing
          a copy of the redemption notice by first-class mail at least
          thirty (30) days prior to the date fixed for redemption to the
          Registered Owners of the Bonds to be redeemed at the addresses
          shown on the registration books; provided, however, that failure
          duly to give such notice by mailing, or any defect therein, shall
          not affect the validity of any proceedings for the redemption of
          the Bonds as to which there shall be no such failure or defect.

             With respect to any notice of redemption of Bonds in
          accordance with the redemption provisions lettered (a) or (b)
          above, unless, upon the giving of such notice, such Bonds shall
          be deemed to have been paid within the meaning of the Indenture,
          such notice shall state that such redemption, shall be
          conditional upon the receipt, by the Trustee on or prior to the
          opening of business on the date fixed for such redemption of
          moneys sufficient to pay the principal of and premium, if any,
          and interest on such Bonds to be redeemed, and that if such
          moneys shall not have been so received said notice shall be of no
          force and effect and the Authority shall not be required to
          redeem such Bonds. In the event that such notice of redemption
          contains such a condition and such moneys are not so received,
          the redemption shall not be made and the Trustee shall within a
          reasonable time thereafter give notice, in the manner in which
          the notice of redemption was given, that such moneys were not so
          received.

             If a notice of redemption shall be unconditional, or if the
          conditions of a conditional notice of redemption shall have been
          satisfied, then upon presentation and surrender of Bonds so
          called for redemption at the place or places of payment, such
          Bonds shall be redeemed.

             Any Bonds and portions of Bonds which have been duly selected
          for redemption shall cease to bear interest on the specified
          redemption date provided that moneys sufficient to pay the
          principal of, premium, if any, and interest on such Bonds shall
          be on deposit with the Trustee on the date fixed for redemption
          so that such Bonds will be deemed to be paid in accordance with
          the Indenture and such Bonds shall thereafter cease to be
          entitled to any lien, benefit or security under the Indenture.

             The Registered Owner 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 default under the Indenture, or to institute,
          appear in or defend any suit or other proceeding with respect
          thereto, except as provided in the Indenture.

             With certain exceptions as provided therein, the Indenture and
          the Loan Agreement may be modified or amended only with the
          consent of the Registered Owners of a majority in aggregate
          principal amount of all Bonds outstanding under the Indenture
          which would be adversely affected thereby.

             Reference is hereby made to the Indenture and the Loan
          Agreement, copies of which are on file with the Trustee, for the
          provisions, among others, with respect to the nature and extent
          of the rights, duties and obligations of the Authority, the
          Company, the Trustee and the Registered Owners of the Bonds.  The
          Registered Owner of this Bond, by the acceptance hereof, is
          deemed to have agreed and consented to the terms and provisions
          of the Indenture and the Loan Agreement.

             Among other things, as provided in the Indenture and subject
          to certain limitations therein set forth, this Bond or any
          portion of the principal amount hereof will be deemed to have
          been paid within the meaning and with the effect expressed in the
          Indenture, and the entire indebtedness of the Authority in
          respect thereof shall be satisfied and discharged, if there has
          been irrevocably deposited with the Trustee, in trust, money in
          an amount which will be sufficient and/or Government Obligations
          (as defined in the Indenture), the principal of and interest on
          which, when due, without regard to any reinvestment thereof, will
          provide moneys which, together with moneys deposited with or held
          by the Trustee, will be sufficient, to pay when due the principal
          of and premium, if any, and interest on this Bond or such portion
          of the principal amount hereof when due.

             Among other things, the Loan Agreement contains terms,
          provisions and conditions relating to the consolidation or merger
          of the Company with or into, and the sale, transfer or other
          disposition of assets to, another Person (as defined in the Loan
          Agreement), to the assumption by such other Person, in certain
          circumstances, of all of the obligations of the Company under the
          Loan Agreement and to the release and discharge of the Company,
          in certain circumstances, from such obligations.

             The Authority, the Trustee, the Registrar, the Paying Agent
          and any co-paying agent may deem and treat the person in whose
          name this Bond is registered as the absolute owner hereof for all
          purposes, whether or not this Bond is overdue, and neither the
          Authority, the Trustee, the Paying Agent nor any co-paying agent
          shall be affected by any notice to the contrary.

             It is hereby certified, recited and declared that all acts,
          conditions and things required by the Constitution and laws of
          the State of Arizona to exist, to have happened and to have been
          performed, precedent to and in the execution and delivery of the
          Indenture and the issuance of this Bond, do exist, have happened
          and have been performed in regular and due form as required by
          law.

             No covenant or agreement contained in this Bond or the
          Indenture shall be deemed to be a covenant or agreement of any
          official, officer, agent or employee of the Authority in his
          individual capacity, and neither the members of the Board of
          Directors of the Authority nor any official executing this Bond,
          shall be liable personally on this Bond or be subject to any
          personal liability or accountability by reason of the issuance or
          sale of this Bond.

             This Bond shall not be entitled to any right or benefit under
          the Indenture, or be valid or become obligatory for any purpose,
          until this Bond shall have been authenticated by the execution by
          the Trustee, or its successor as Trustee, of the certificate of
          authentication inscribed hereon.

     <PAGE>

              IN WITNESS WHEREOF, The Industrial Development Authority of
          The County of Pima has caused this Bond to be executed with the
          manual or facsimile signature of its President or Vice President
          and a facsimile of its official seal to be imprinted hereon and
          attested with the manual or facsimile signature of its Secretary
          or Assistant Secretary.

                                        THE INDUSTRIAL DEVELOPMENT
                                        AUTHORITY OF THE COUNTY OF PIMA
          (Seal)


                                        By.................................
                                                President

          ATTEST:

          ...........................................
                  Secretary

     <PAGE>

                                                                  EXHIBIT B


                     (FORM FOR ORDINARY REGISTRATION OF TRANSFER)

                       COMPLETE AND SIGN THIS FORM FOR ORDINARY
                               REGISTRATION OF TRANSFER


          FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
          transfer(s) unto


          Please Insert Social Security Or Other Identifying Number of
          Assignee

          . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

          . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
          Please print or typewrite name and address including postal zip
          code of assignee

          . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
          this bond and all rights thereunder, hereby irrevocably
          constituting and appointing _______________________ attorney to
          register such transfer on the registration books in the principal
          office of the Registrar, with full power of substitution in the
          premises.

          Dated:..............     ........................................
                                   NOTE:  The signature on this assignment
                                   must correspond with the name as written
                                   on the face of this Bond in every
                                   particular, without alteration,
                                   enlargement or any change whatsoever.

     <PAGE>

                                                                  EXHIBIT C

                  (FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION)

                            CERTIFICATE OF AUTHENTICATION

                    This is to certify that this Bond is one of the Bonds
               described in the within-mentioned Indenture.


                         FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION,
                         as Trustee


                         By................................................
                           Authorized Officer


          Date of Authentication:......................



                                                               Exhibit 4c
          ==================================================================




                                    LOAN AGREEMENT
                                   (1997 Series B)


                                       between



                        THE INDUSTRIAL DEVELOPMENT AUTHORITY 
                                OF THE COUNTY OF PIMA





                                         and



                            TUCSON ELECTRIC POWER COMPANY




                                     ------------




                            Dated as of September 15, 1997



                                     ------------



                                     Relating To

                        Industrial Development Revenue Bonds,
                                    1997 Series B
                       (Tucson Electric Power Company Project)


          ==================================================================

          <PAGE>

                               TABLE OF CONTENTS*

                                                                       Page
                                                                       ----

               LOAN AGREEMENT . . . . . . . . . . . . . . . . . . . . .   1

                                      ARTICLE I

                                     DEFINITIONS
                  SECTION 1.01.  Definitions  . . . . . . . . . . . . .   2
                  SECTION 1.02.  Incorporation of Certain Definitions
                                   by Reference . . . . . . . . . . . .   4

                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES
                  SECTION 2.01.  Representations and Warranties of
                                   the Authority  . . . . . . . . . . .   4
                  SECTION 2.02.  Representations and Warranties of
                                   the Company  . . . . . . . . . . . .   5

                                     ARTICLE III

                                    THE FACILITIES
                  SECTION 3.01.  Facilities; Property of the Company  .   5
                  SECTION 3.02.  Revision of Plans and Specifications .   5
                  SECTION 3.03.  Maintenance of Facilities; Remodeling    6
                  SECTION 3.04.  Insurance  . . . . . . . . . . . . . .   6
                  SECTION 3.05.  Condemnation . . . . . . . . . . . . .   6
                  SECTION 3.06.  Termination of Construction  . . . . .   6

                                      ARTICLE IV

              ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS
                                     OF THE BONDS
                  SECTION 4.01.  Issuance of the Bonds  . . . . . . . .   6
                  SECTION 4.02.  Issuance of Other Obligations. . . . .   6
                  SECTION 4.03.  The Loan; Disposition of Bond Proceeds   6
                  SECTION 4.04.  Investment of Moneys in Funds and
                                   Accounts . . . . . . . . . . . . . .   7
           
                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS
                  SECTION 5.01.  Loan Payments. . . . . . . . . . . . .   7
                  SECTION 5.02.  Payments Assigned; Obligation Absolute   7
                  SECTION 5.03.  Payment of Expenses  . . . . . . . . .   7
                  SECTION 5.04.  Indemnification  . . . . . . . . . . .   7
                  SECTION 5.05.  Payment of Taxes; Discharge of Liens .   8

                                      ARTICLE VI

                                  SPECIAL COVENANTS
                  SECTION 6.01.  Maintenance of Corporate Existence . .   8
                  SECTION 6.02.  Permits or Licenses  . . . . . . . . .   9


     -------------------- 
     *     This table of contents is not part of the Loan Agreement, and is 
           for convenience only.  The captions herein are of no legal effect
           and do not vary the meaning or legal effect of any part of the
           Loan Agreement.


     <PAGE>

                  SECTION 6.03.  Authority's Access to Facilities . . .   9
                  SECTION 6.04.  Tax-Exempt Status of Interest on Bonds.  9
                  SECTION 6.05.  Use of Facilities  . . . . . . . . . .  10
                  SECTION 6.06.  Financing Statements . . . . . . . . .  10

                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING
                  SECTION 7.01.  Conditions . . . . . . . . . . . . . .  10
                  SECTION 7.02.  Instrument Furnished to the Authority
                                   and Trustee  . . . . . . . . . . . .  12
                  SECTION 7.03.  Limitation . . . . . . . . . . . . . .  12

                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES
                  SECTION 8.01.  Events of Default  . . . . . . . . . .  12
                  SECTION 8.02.  Force Majeure  . . . . . . . . . . . .  12
                  SECTION 8.03.  Remedies . . . . . . . . . . . . . . .  13
                  SECTION 8.04.  No Remedy Exclusive  . . . . . . . . .  13
                  SECTION 8.05.  Reimbursement of Attorneys' and
                                   Agents' Fees . . . . . . . . . . . .  13
                  SECTION 8.06.  Waiver of Breach . . . . . . . . . . .  13

                                      ARTICLE IX

                                 REDEMPTION OF BONDS
                  SECTION 9.01.  Redemption of Bonds  . . . . . . . . .  14
                  SECTION 9.02.  Compliance with the Indenture  . . . .  14

                                      ARTICLE X

                                    MISCELLANEOUS
                  SECTION 10.01.  Term of Agreement . . . . . . . . . .  14
                  SECTION 10.02.  Notices . . . . . . . . . . . . . . .  14
                  SECTION 10.03.  Parties in Interest . . . . . . . . .  14
                  SECTION 10.04.  Amendments  . . . . . . . . . . . . .  15
                  SECTION 10.05.  Counterparts  . . . . . . . . . . . .  15
                  SECTION 10.06.  Severability  . . . . . . . . . . . .  15
                  SECTION 10.07.  Governing Law . . . . . . . . . . . .  15
                  SECTION 10.08.  Notice Regarding Cancellation
                                   of Contracts.  . . . . . . . . . . .  15


          Signatures  . . . . . . . . . . . . . . . . . . . . . . . . .  18
          Exhibit A - Description of the Facilities . . . . . . . . . . A-1


          <PAGE>

                                    LOAN AGREEMENT

             THIS LOAN AGREEMENT (1997 Series B), dated as of September 15,
          1997  (this  "Agreement"),  between  THE  INDUSTRIAL  DEVELOPMENT
          AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation
          designated  by law  as a  political subdivision  of the  State of
          Arizona (hereinafter called the "Authority"), and TUCSON ELECTRIC
          POWER  COMPANY, a  corporation organized  and existing  under the
          laws of the State of Arizona (hereinafter called the "Company"),

                                W I T N E S S E T H :

             WHEREAS, the Authority is authorized and empowered under Title
          35, Chapter 5,  Arizona Revised Statutes, as amended (the "Act"),
          to issue its bonds in accordance with the Act and to make secured
          or  unsecured loans for  the purpose of  financing or refinancing
          the   acquisition,  construction,  improvement  or  equipping  of
          projects consisting  of land, any building  or other improvement,
          and all real  and personal properties, including  but not limited
          to  machinery and equipment, whether  or not now  in existence or
          under  construction,  whether  located  within  or  without  Pima
          County,  which  shall  be   suitable  for,  among  other  things,
          facilities  for the furnishing of  electric energy, gas or water,
          air and water  pollution control facilities and  sewage and solid
          waste disposal facilities, and to charge and  collect interest on
          such loans and pledge the proceeds of loan agreements as security
          for the  payment of the  principal of  and interest on  bonds, or
          designated  issues of  bonds,  issued by  the  Authority and  any
          agreements made  in connection  therewith, whenever the  Board of
          Directors  of the Authority finds such loans to be in furtherance
          of the purposes of the Authority or in the public interest;

             WHEREAS,   the  Authority   has  heretofore  issued   and sold
          $75,000,000   aggregate  principal   amount  of   its  Industrial
          Development Revenue  Bonds, 1982 Series A  (Tucson Electric Power
          Company General  Project), all  of which remain  outstanding (the
          "1982  Bonds  due June  15, 2022"),  the  proceeds of  which were
          loaned to the  Company to finance and refinance a  portion of the
          costs of the acquisition, construction, improvement and equipping
          of  certain  of the  facilities  for  furnishing electric  energy
          described in Exhibit A hereto ("Facilities"); 

             WHEREAS,  the Authority  has also  heretofore issued  and sold
          $75,000,000   aggregate  principal   amount  of   its  Industrial
          Development Revenue  Bonds, 1982 Series A  (Tucson Electric Power
          Company General  Project), all  of which remain  outstanding (the
          "1982  Bonds due July 1, 2022", and, together with the 1982 Bonds
          due June  15, 2022, hereinafter  collectively referred to  as the
          "1982 Bonds"), the proceeds  of which were loaned to  the Company
          to  finance  and  refinance   certain  additional  costs  of  the
          Facilities; and

             WHEREAS, the Authority proposes  to issue and sell its revenue
          bonds  for   the  purpose  of  refinancing,  by  the  payment  or
          redemption of the 1982 Bonds, or provisions therefor, the portion
          of  the  costs  of  the  Facilities  previously  financed  and/or
          refinanced from the proceeds of the 1982 Bonds;

             NOW, THEREFORE,  the parties  hereto, intending  to be legally
          bound  hereby and  in consideration  of the  premises, DO  HEREBY
          AGREE as follows:

                                      ARTICLE I
                                               
                                     DEFINITIONS

             SECTION 1.01.  Definitions.  The terms defined in this Article
          I  shall for  all purposes  of this  Agreement have  the meanings
          herein specified, unless the context clearly requires otherwise: 

          Act:
             "Act"  shall  mean   Title  35,  Chapter  5,  Arizona  Revised
          Statutes,  and  all  acts  supplemental  thereto  or   amendatory
          thereof.  

          Administration Expenses:

             "Administration Expenses" shall mean  the reasonable  expenses
          incurred by  the Authority  with respect to  this Agreement,  the
          Indenture  and  any transaction  or  event  contemplated by  this
          Agreement  or  the  Indenture,  including  the  compensation  and
          reimbursement of expenses and advances payable to the Trustee, to
          the paying agent, any co-paying agent and the registrar under the
          Indenture  and  a  pro  rata  share  of  the  Authority's  annual
          operating expenses in accordance with the provisions of paragraph
          XII.D. of the Authority's Procedural Pamphlet.

          Agreement:

             "Agreement"  shall  mean  this  Loan  Agreement,  dated  as of
          September  15, 1997, between  the Authority and  the Company, and
          any   and  all   modifications,   alterations,   amendments   and
          supplements hereto.

          Authority:

             "Authority" shall mean The Industrial Development Authority of
          the County  of Pima, an Arizona  nonprofit corporation designated
          by  law  as  a political  subdivision  of  the  State of  Arizona
          incorporated for and with the  approval of Pima County,  Arizona,
          pursuant  to the provisions of  the Constitution of  the State of
          Arizona and the Act, its successors and their assigns.

          Authorized Company Representative:

             "Authorized Company  Representative" shall mean each person at
          the time designated  to act on behalf  of the Company by  written
          certificate furnished to the Authority and the Trustee containing
          the specimen signature of such person and signed on behalf of the
          Company by its  President, any Vice  President or its  Treasurer,
          together with its Secretary or any Assistant Secretary.

          Bond Counsel:

             "Bond  Counsel"  shall mean  any  firm  or firms of nationally
          recognized bond counsel experienced  in matters pertaining to the
          validity  of, and  exclusion from  gross income  for federal  tax
          purposes of  interest  on bonds  issued by  states and  political
          subdivisions,  selected  by the  Company  and  acceptable to  the
          Authority. 
                     
          Bond Fund:

             "Bond Fund" shall mean the fund created by Section 4.01 of the
          Indenture.

          Bonds:

             "Bond"  or  "Bonds"  shall  mean  the  Industrial  Development
          Revenue  Bonds,  1997 Series  B  (Tucson  Electric Power  Company
          Project) of the Authority.  

          Code:

             "Code" shall  mean the  Internal Revenue  Code of 1986 or  any
          successor  statute thereto.  Each  reference to a  section of the
          Code herein shall be deemed to include the United States Treasury
          Regulations proposed  or in  effect thereunder and  applicable to
          the  Bonds or the use of the proceeds thereof, unless the context
          clearly  requires otherwise.   Reference  to any  particular Code
          section shall, in the event of  a successor Code, be deemed to be
          a reference to the successor to such Code section.

          Company:

             "Company"  shall   mean  Tucson   Electric  Power  Company,  a
          corporation organized and existing under the laws of the State of
          Arizona,  its successors  and their  assigns,  including, without
          limitation, any  successor obligor under Section 6.01  or 7.01 to
          the extent of the obligations assumed thereunder.

          Completion Date:

             "Completion Date" shall  be the  date on  which the Facilities
          are completed in their entirety and ready to be placed in service
          and operated, all as determined by the Company.

          Facilities:

             "Facilities"  shall  mean  the  real  and personal properties,
          machinery  and equipment  currently existing,  under construction
          and to be constructed which are described in Exhibit A hereto, as
          revised from  time  to  time  to  reflect  any  changes  therein,
          additions thereto, substitutions therefor and deletions therefrom
          permitted  by   the  terms  hereof,  subject,   however,  to  the
          provisions of Section 7.01 hereof.

          Indenture:

             "Indenture"  shall  mean the  Indenture of Trust, dated  as of
          September  15,  1997,  between  the  Authority  and  the  Trustee
          relating   to  the   Bonds,  and   any  and   all  modifications,
          alterations, amendments and supplements thereto.  

          Loan Payments:

             "Loan Payments" shall mean the payments required to be made by
          the Company pursuant to Section 5.01 hereof. 

          1954 Code:

             "1954 Code"  shall mean the Internal  Revenue Code  of 1954, as
          amended.

          1982 Bonds:

             "1982  Bonds" shall mean the  $75,000,000 aggregate  principal
          amount of  the Authority's Industrial  Development Revenue Bonds,
          1982 Series A (Tucson Electric Power Company General Project) due
          June 15, 2022 and  $75,000,000 aggregate principal amount of  the
          Authority's Industrial Development  Revenue Bonds, 1982 Series  A
          (Tucson Electric Power Company General Project) due July 1, 2022.

          Outstanding:

             "Outstanding",  when used in  reference to  the  Bonds,  shall
          mean,  as  at any  particular date,  the  aggregate of  all Bonds
          authenticated and delivered under the Indenture except: 

               (a)   those canceled by the Trustee at or prior  to such date
             or delivered to or  acquired by the Trustee at or prior to such
             date for cancellation; 

               (b)  those deemed to be paid in accordance with  Article VIII
             of the Indenture; and

               (c)  those  in lieu of  or in exchange  or  substitution  for
             which other Bonds  shall have been authenticated and  delivered
             pursuant to  the Indenture,  unless proof  satisfactory to  the
             Trustee and the Company is presented  that such Bonds are  held
             by a bona fide holder in due course.

          Person:

             "Person" means (i) any corporation, limited liability company,
          partnership,  joint  venture,  association, joint-stock  company,
          business  trust, or  unincorporated  organization,  in each  case
          formed  or organized  under  the laws  of  the United  States  of
          America, any state thereof  or the District of Columbia,  or (ii)
          the  United  States  of America  or  any  state  thereof, or  any
          political subdivision of either thereof, or any agency, authority
          or other instrumentality of any of the foregoing.  

          Tax Agreement:

             "Tax Agreement" shall mean that tax certificate and agreement,
          dated  the date of the initial authentication and delivery of the
          Bonds, between the  Authority and  the Company,  relating to  the
          requirements  of  the  Code,   and  any  and  all  modifications,
          alterations, amendments and supplements thereto.

          Trustee:

             "Trustee"  shall  mean  First  Trust  of  New  York,  National
          Association, as  trustee under  the Indenture, its  successors in
          trust and their assigns.

             SECTION  1.02.     Incorporation  of  Certain  Definitions   by
          Reference.  Each capitalized  term used herein and not  otherwise
          defined herein shall have the meaning set forth in the Indenture.


                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES

             SECTION   2.01.     Representations and   Warranties  of   the
          Authority.  The Authority makes the following representations and
          warranties as the  basis for the undertakings on  the part of the
          Company contained herein:

               (a)     The Authority  is  an  Arizona  nonprofit corporation
             designated by  law as a political  subdivision of  the State of
             Arizona created  and existing under  the Constitution and  laws
             of the State of Arizona; 

               (b)     The  Authority  has  the  power  to  enter into  this
             Agreement  and the  Indenture and  to perform  and observe  the
             agreements  and covenants  on  its part  contained  herein  and
             therein, including  without limitation the  power to issue  and
             sell the Bonds  as contemplated  herein and  in the  Indenture,
             and  by proper  action has  duly authorized  the  execution and
             delivery hereof and thereof; and

               (c)   The execution and  delivery  of this  Agreement and the
             Indenture by  the Authority  do not,  and  consummation of  the
             transactions contemplated hereby  and fulfillment of  the terms
             hereof  and thereof  by the  Authority  will  not, result  in a
             breach  of any of  the terms or provisions  of, or constitute a
             default under, any indenture, mortgage,  deed of trust or other
             agreement or instrument to which the  Authority is now a  party
             or by which  it is now bound, or, to the best  knowledge of the
             Authority,  any order,  rule or  regulation applicable  to  the
             Authority   of  any  court   or  of   any  regulatory  body  or
             administrative  agency   or  other  governmental  body   having
             jurisdiction over the Authority or over any of its  properties,
             or the Constitution or laws of the State of Arizona.

             SECTION 2.02.   Representations and Warranties of the Company.
          The Company makes the following representations and warranties as
          the  basis  for the  undertakings on  the  part of  the Authority
          contained herein:

               (a)   The  Company  is  a  corporation  duly   organized  and
             existing in  good  standing under  the  laws  of the  State  of
             Arizona  and  duly qualified  as a  foreign corporation  in the
             State of New Mexico; 

               (b)  The  Company has power to enter into this  Agreement and
             to  perform and  observe the  agreements and  covenants on  its
             part contained  herein and by  proper corporate action has duly
             authorized  the execution  and delivery  hereof and  all  other
             documents hereby executed by the Company; 

               (c)  The  execution and  delivery of  this  Agreement by  the
             Company do not,  and consummation of  transactions contemplated
             hereby and fulfillment of the terms  hereof by the Company will
             not, result in a  breach of any of  the terms or provisions of,
             or constitute  a default under,  any indenture, mortgage,  deed
             of trust or other agreement or  instrument to which the Company
             is  a party  or  by  which it  is  now bound,  or the  Restated
             Articles of  Incorporation or  by-laws of the  Company, or  any
             order, rule  or  regulation applicable  to the  Company of  any
             court or  of any  regulatory body  or administrative  agency or
             other governmental  body having  jurisdiction over  the Company
             or  over  any  of  its  properties,   or  any  statute  of  any
             jurisdiction applicable to the Company; 

               (d)   The  Arizona Corporation  Commission  has  approved all
             matters  relating  to   the  Company's  participation   in  the
             transactions contemplated by this Agreement which require  said
             approval,  and no  other  consent,  approval, authorization  or
             other order of any  regulatory body or administrative agency or
             other governmental body  is legally required for the  Company's
             participation therein,  except such as  may have been  obtained
             or   may  be   required  under  the  securities   laws  of  any
             jurisdiction;

               (e)    The Facilities  are to  be  used  solely  for purposes
             contemplated by the  Act and are located  or are to be  located
             within the State of Arizona; and

               (f)   All of the proceeds of the Bonds (exclusive  of accrued
             interest, if any, paid by the  initial purchasers of such Bonds
             upon  delivery  thereof) will  be  expended  to  refinance  the
             Facilities  through  the payment  or  redemption  of  the  1982
             Bonds, or provisions therefor.


                                     ARTICLE III

                                    THE FACILITIES

             SECTION  3.01.    Facilities;  Property of  the  Company.   An
          undivided interest in the Facilities shall be the property of the
          Company  and the Authority shall have no right, title or interest
          in the Facilities.

             SECTION  3.02.    Revision of  Plans and  Specifications.  The
          Company  may consent  to one or  more revisions to  the plans and
          specifications for  the Facilities (including  without limitation
          any  changes therein,  additions thereto,  substitutions therefor
          and deletions therefrom), at any time and from time to time prior
          to  the Completion Date in any  respect; provided, however, that,
          if any such  revision shall render inaccurate the  description of
          the  Facilities contained in Exhibit  A hereto, the Company shall
          deliver to the Authority and the  Trustee (a) a revised Exhibit A
          containing  a  description  of  the Facilities  as  revised,  the
          accuracy of  which shall  have  been certified  by an  Authorized
          Company Representative, and (b) an opinion of Bond Counsel to the
          effect  that the Facilities as described in the revised Exhibit A
          are  such that  the  expenditure of  the  proceeds of  the  Bonds
          pursuant to this Agreement will not, in and of itself, impair the
          validity  of the Bonds under the Act  or the exclusion from gross
          income for  federal tax  purposes of  interest on  the Bonds.   A
          revision  of Exhibit A hereto pursuant to this Section 3.02 shall
          not  constitute  an amendment,  change  or  modification of  this
          Agreement within the meaning of Article XII of the Indenture.

             SECTION  3.03.   Maintenance of  Facilities; Remodeling.   The
          Company  shall at  all  times  cause  the Facilities,  and  every
          element and unit thereof, to be maintained, preserved and kept in
          thorough  repair,  working  order  and condition  and  cause  all
          needful  and  proper repairs  and  renewals thereto  to  be made;
          provided, however,  that the Company  may cause the  operation of
          the   Facilities,  or  any   element  or  unit   thereof,  to  be
          discontinued if, in the judgment of the Company,  it is no longer
          advisable to operate the same, or if the Company intends  to sell
          or  dispose  of  the same  and  within  a  reasonable time  shall
          endeavor to effectuate such sale or disposition.

             After  the Completion  Date, the  Company may,  subject to the
          provisions of Section 6.05 hereof, at its own expense remodel the
          Facilities   or  make   such  substitutions,   modifications  and
          improvements to  the Facilities from time  to time as  it, in its
          discretion, may deem to  be desirable for its uses  and purposes,
          which remodeling, substitutions,  modifications and  improvements
          shall  be included under  the terms of this  Agreement as part of
          the Facilities.  

             SECTION  3.04.    Insurance.    The  Company  shall  keep  the
          Facilities insured against  fire and  other risks  to the  extent
          usually insured against by companies owning and operating similar
          property, by  reputable insurance companies or,  at the Company's
          election,  with respect  to all  or  any element  or unit  of the
          Facilities,  by means of an adequate insurance fund set aside and
          maintained  by it out of its own  earnings or in conjunction with
          other  companies  through  an  insurance  fund,  trust  or  other
          agreement  or, by  means  of unfunded  self-insurance  as may  be
          reasonable  and  customary  by  companies  owning  and  operating
          similar  property.  All proceeds  of such insurance  shall be for
          the account of the Company.  

             SECTION 3.05.  Condemnation.  The Company shall be entitled to
          the entire proceeds of any  condemnation award or portion thereof
          made  for  damages  to or  takings  of  the  Facilities or  other
          property of the Company.  

             SECTION 3.06.  Termination of Construction.   Anything in this
          Agreement to the contrary notwithstanding, the Company shall have
          the  right at  any  time to  terminate  the construction  of  the
          Facilities, in whole,  if the Company shall have  determined that
          the  continued construction  or operation  of the  Facilities, in
          whole,  is  impracticable, uneconomical  or  undesirable for  any
          reason.


                                      ARTICLE IV

              ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS
                                     OF THE BONDS

             SECTION 4.01.   Issuance  of the  Bonds.  The Authority  shall
          issue  the Bonds  under  and in  accordance  with the  Indenture,
          subject  to the provisions  of the bond  purchase agreement among
          the  Authority, the initial purchaser  or purchasers of the Bonds
          and the Company.  The Company hereby approves the issuance of the
          Bonds and all terms and conditions thereof.  

             SECTION 4.02.   Issuance of Other  Obligations.  The Authority
          and the Company expressly reserve the right to enter into, to the
          extent  permitted by  law, but  shall not  be obligated  to enter
          into,  an agreement or agreements other  than this Agreement with
          respect to the issuance  by the Authority, under an  indenture or
          indentures other  than the  Indenture, of obligations  to provide
          additional  funds  to  pay  the   cost  of  construction  of  the
          Facilities or obligations to refund  all or any principal  amount
          of the Bonds, or any combination thereof.  

             SECTION  4.03.  The  Loan; Disposition  of Bond Proceeds.  The
          Authority and  the Company  shall enter into  escrow arrangements
          with the trustee for the 1982 Bonds and shall cause the  proceeds
          of the  Bonds, other than accrued  interest, if any,  paid by the
          initial  purchaser  or purchasers  thereof,  to  be deposited  in
          escrow with such trustee to be applied to the payment of the 1982
          Bonds upon the redemption thereof.

             The Authority shall  establish the Bond  Fund with the Trustee
          in accordance with Section 4.01 of the Indenture.

             SECTION  4.04.   Investment  of Moneys  in Funds and Accounts.
          The  Company and the Authority agree  that any moneys held in any
          fund or account  created by  the Indenture shall  be invested  as
          provided in the Indenture.


                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS

             SECTION  5.01.    Loan  Payments.    In  consideration of  the
          issuance of the Bonds and the disposition of the proceeds thereof
          as contemplated in Section 4.03 hereof, the Company shall pay, or
          cause to be paid, to the Trustee for the account of the Authority
          an  amount equal to the  aggregate principal amount  of the Bonds
          from  time to time Outstanding and, as interest on its obligation
          to  pay such  amount, an  amount equal  to premium,  if any,  and
          interest on such Bonds,  such amounts to be paid  in installments
          due on  the dates, in the  amounts and in the  manner provided in
          the  Indenture for the Authority to cause amounts to be deposited
          in the Bond Fund for the payment of the principal of and premium,
          if any, and  interest on  the Bonds whether  at stated  maturity,
          upon redemption or acceleration or  otherwise; provided, however,
          that  the  obligation of  the Company  to  make any  such payment
          hereunder shall be reduced  by the amount of any  reduction under
          the Indenture of the amount of the corresponding payment required
          to be made by the Authority thereunder.

             SECTION  5.02.  Payments  Assigned; Obligation Absolute. It is
          understood  and  agreed  that  all  Loan  Payments  are,  by  the
          Indenture, to be  pledged by  the Authority to  the Trustee,  and
          that  all rights and interest  of the Authority hereunder (except
          for the  Authority's rights under  Sections 5.03, 5.04,  6.03 and
          8.05 hereof and any  rights of the Authority to  receive notices,
          certificates,  requests,  requisitions  and other  communications
          hereunder) are  to be pledged  and assigned to the  Trustee.  The
          Company assents to such pledge and assignment and agrees that the
          obligation  of the  Company to  make the  Loan Payments  shall be
          absolute, irrevocable and unconditional  and shall not be subject
          to  cancellation, termination  or  abatement, or  to any  defense
          other  than payment or to  any right of  set-off, counterclaim or
          recoupment  arising out  of any  breach by  the Authority  or the
          Trustee or any other party under this Agreement, the Indenture or
          otherwise,  or out  of any  obligation or  liability at  any time
          owing to the  Company by the Authority, the Trustee  or any other
          party,  and,  further,  that  the Loan  Payments  and  the  other
          payments  due hereunder shall continue to be payable at the times
          and in the amounts  herein and therein specified, whether  or not
          the Facilities, or any portion thereof, shall have been completed
          or shall have been  destroyed by fire or other casualty, or title
          thereto,  or  the  use thereof,  shall  have  been  taken by  the
          exercise of the power of eminent domain, and  that there shall be
          no  abatement of  or diminution  in any  such payments  by reason
          thereof, whether or not  the Facilities shall be used  or useful,
          whether  or not  any  applicable laws,  regulations or  standards
          shall prevent or  prohibit the use of the Facilities,  or for any
          other reason, all of the foregoing being subject, however, to the
          provisions of Sections 6.01 and 7.01 hereof.

             SECTION 5.03.  Payment of Expenses.  The Company shall pay all
          Administration    Expenses,   including,    without   limitation,
          Administration Expenses  incurred at  and subsequent to  the time
          the Bonds are deemed to have been paid in accordance with Article
          VIII of  the Indenture.  The payment  of the compensation and the
          reimbursement of expenses  and advances  of the  Trustee, of  the
          paying agent,  any co-paying agent  and the  registrar under  the
          Indenture shall be made directly to such entities.  

             SECTION  5.04.   Indemnification.   The  Company releases  the
          Authority, the  Trustee and their directors,  officers, employees
          and  agents from, agrees that the Authority and the Trustee shall
          not  be  liable  for,  and  agrees  to  indemnify  and  hold  the
          Authority, the Trustee and  their directors, officers,  employees
          and  agents free  and  harmless from,  any liability  (including,
          without  limitation,  attorneys'  and   other  agents'  fees  and
          expenses) for  any loss or damage to property or any injury to or
          death  of  any  person  that  may  be  occasioned  by  any  cause
          whatsoever pertaining to  the Facilities, except (i)  in the case
          of  the Trustee, as  a result of  the negligence or  bad faith or
          willful  misconduct of  the Trustee  or its  directors, officers,
          employees and agents; and (ii) in the case of the Authority, as a
          result of gross  negligence or bad faith of  the Authority or its
          directors, officers, employees and agents.

             The  Company  will indemnify  and hold  the  Authority and the
          Trustee, free  and harmless from  any loss,  claim, damage,  tax,
          penalty, liability, disbursement, litigation expenses, attorneys'
          and  other agents' fees and  expenses or court  costs arising out
          of, or in  any way relating to,  the execution or  performance of
          this  Agreement, the issuance or sale of the Bonds, actions taken
          under the  Indenture or any other cause  whatsoever pertaining to
          the  Facilities, except (i) in the  case the Trustee, as a result
          of  the  negligence or  bad faith  or  willful misconduct  of the
          Trustee; and  (ii) in the case  of the Authority, as  a result of
          the gross negligence or bad faith of the Authority.

             The  Company will  indemnify  and hold  the  Authority and its
          directors, officers, employees and  agents free and harmless from
          any loss, claim,  damage, tax, penalty,  liability, disbursement,
          litigation expenses, attorney's fees  and expenses or court costs
          arising out of or in any  way relating to 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 material  utilized in  connection with  the sale of  any
          Bonds.

             SECTION  5.05.   Payment of  Taxes;  Discharge  of Liens.  The
          Company shall: (a)  pay, or  make provision for  payment of,  all
          lawful taxes and assessments, including income, profits, property
          or  excise  taxes, if  any,  or other  municipal  or governmental
          charges, levied  or assessed by  any federal, state  or municipal
          government  or political  body upon  the  Facilities or  any part
          thereof  or upon the Authority with respect to the Loan Payments,
          when  the same  shall become  due;  and (b)  pay or  cause to  be
          satisfied and  discharged or  make adequate provision  to satisfy
          and  discharge, within  sixty  (60)  days  after the  same  shall
          accrue, any lien or charge upon the Loan Payments, and all lawful
          claims or demands for labor, materials, supplies or other charges
          which,  if unpaid, might be  or become a  lien upon such amounts;
          provided,  that, if the Company shall  first notify the Authority
          and  the Trustee of  its intention so  to do, the  Company may in
          good faith contest any  such lien or charge or claims  or demands
          in appropriate  legal proceedings, and  in such event  may permit
          the items so  contested and identified as such  by the Company to
          remain  undischarged and  unsatisfied during  the period  of such
          contest and any appeal therefrom, unless the Trustee shall notify
          the Company  in writing that,  in the  opinion of counsel  to the
          Trustee,  based  upon material  facts  disclosed  to the  Trustee
          without  any duty  of  investigation, by  nonpayment of  any such
          items the lien of the  Indenture as to the Loan Payments  will be
          materially endangered, in which  event the Company shall promptly
          pay  and cause  to be  satisfied and  discharged all  such unpaid
          items.  The Authority  shall cooperate fully with the  Company in
          any such contest.

                                      ARTICLE VI

                                  SPECIAL COVENANTS

             SECTION 6.01.  Maintenance of Corporate  Existence.  Except as
          permitted  in this Section  6.01, the Company  shall maintain its
          corporate  existence,  shall  not  sell,  transfer  or  otherwise
          dispose of all of its assets, as or substantially as an entirety,
          and  shall not  consolidate with  or merge  with or  into another
          corporation.   The Company  may  consolidate with  or merge  into
          another  corporation incorporated  under the  laws of  the United
          States of America, any state thereof or the District of Columbia,
          or sell, transfer or otherwise  dispose of all of its  assets, as
          or  substantially as an entirety, to any Person, if the surviving
          or resulting  corporation  (if other  than  the Company)  or  the
          transferee Person, as the case may be, prior to or simultaneously
          with such  merger, consolidation, sale, transfer  or disposition,
          assumes,  by  delivery to  the Trustee  and  the Authority  of an
          instrument in writing  satisfactory in form  to the Trustee,  all
          the obligations  of the Company under  this Agreement, including,
          without limitation, the obligations  of the Company under Section
          5.01  hereof.  Upon such  an assumption following  any such sale,
          transfer or  other disposition of  assets, the  Company shall  be
          released  and discharged  from all  liability  in respect  of all
          obligations under this Agreement.  Notwithstanding the foregoing,
          in the  case of any such  sale, transfer or other  disposition of
          assets,  which do not  include the Facilities,  the Company shall
          remain liable in respect of all obligations under this  Agreement
          other  than the  obligations under  Section 5.01 hereof,  and the
          transferee  shall  not  be  required to  assume  any  obligations
          hereunder other  than the obligations under  Section 5.01 hereof;
          provided,  however,  that the  transferee  shall  be required  to
          assume all such  other obligations unless the Company  shall have
          delivered to the  Authority and  the Trustee an  opinion of  Bond
          Counsel to the  effect that the non-assumption  by the transferee
          of  such other obligations will not impair the validity under the
          Act of the Bonds and will not adversely affect the exclusion from
          gross income for federal tax purposes of interest on the Bonds.

             If   consolidation,  merger  or   sale,   transfer  or   other
          disposition is  made  as  permitted  by this  Section  6.01,  the
          provisions  of this Section 6.01 shall continue in full force and
          effect  and no  further consolidation,  merger or  sale  or other
          transfer shall be  made except in compliance  with the provisions
          of this Section 6.01.

             Anything  in  this Agreement to the  contrary notwithstanding,
          the sale, transfer or other disposition  by the Company of all of
          its facilities (a) for the generation of electric energy, (b) for
          the  transmission of electric energy or  (c) for the distribution
          of  electric energy, in each case considered alone, or all of its
          facilities described in clauses (a) and (b), considered together,
          or  all of  its  facilities described  in  clauses (b)  and  (c),
          considered  together, shall in no event be deemed to constitute a
          sale,  transfer or other disposition of all the properties of the
          Company, as or substantially  as an entirety, unless, immediately
          following such  sale, transfer or other  disposition, the Company
          shall  own no properties in the other such categories of property
          not so sold, transferred or otherwise disposed of.  The character
          of particular facilities shall be  determined by reference to the
          Uniform System  of Accounts  prescribed for public  utilities and
          licensees  subject to the Federal  Power Act, as  amended, to the
          extent applicable.

             SECTION  6.02.  Permits or Licenses.  In the event that it may 
          be necessary for the proper performance of this Agreement  on the
          part  of the  Company or  the Authority  that any  application or
          applications  for any  permit  or license  to  do or  to  perform
          certain things be made to any governmental or other agency by the
          Company  or  the Authority,  the Company  and the  Authority each
          shall, upon  the request of  either, execute such  application or
          applications.  

             SECTION  6.03.     Authority's  Access  to  Facilities.    The
          Authority shall have the right, upon appropriate  prior notice to
          the Company,  to have reasonable access to  the Facilities during
          normal business  hours for the purpose of making examinations and
          inspections of the same.  

             SECTION 6.04.  Tax-Exempt Status of Interest on Bonds. (a)  It
          is the intention of the parties hereto that interest on the Bonds
          shall be and remain tax-exempt, and to that end the covenants and
          agreements  of the Authority and the Company in this Section 6.04
          and the Tax Agreement are for the benefit of the Owners from time
          to time of the Bonds.

               (b)  Each  of the  Company and the  Authority  covenants  and
             agrees for the benefit  of the Owners from  time to time of the
             Bonds  that it will  not directly  or indirectly  use or permit
             the use of  (to the extent within  its control) the proceeds of
             any  of the Bonds or any  other funds, or  take or omit to take
             any action,  if and to the  extent such use,  or the taking  or
             omission to  take such action, would cause any of  the Bonds to
             be "arbitrage bonds" within the meaning  of Section 148 of  the
             Code or otherwise subject to federal  income taxation by reason
             of Section 103 and 141 through 150 of  the Code or Section  103
             of the 1954 Code and Title XIII of the Tax  Reform Act of 1986,
             as  applicable,  and  any  applicable  regulations  promulgated
             thereunder.  To such ends, the  Authority and the Company  will
             comply with all requirements of such  Section 148 to the extent
             applicable to  the Bonds.  In  the event that  at any time  the
             Authority or  the Company is of  the opinion  that for purposes
             of this  Section 6.04(b) it is  necessary to  restrict or limit
             the yield  on the investment of any moneys held  by the Trustee
             under  the Indenture,  the Authority  or the  Company shall  so
             notify the Trustee in writing.

               Without  limiting  the   generality  of  the  foregoing,  the
             Company and the Authority agree that  there shall be paid  from
             time to time all  amounts required to be rebated to the  United
             States of  America pursuant to Section  148(f) of  the Code and
             any applicable  Treasury  Regulations.    This  covenant  shall
             survive payment  in full  or defeasance  of the  Bonds and  the
             satisfaction  and discharge  of  the Indenture.    The  Company
             specifically covenants  to pay or cause  to be  paid the Rebate
             Requirement as defined and described in the Tax Agreement.

               (c)  The Authority certifies and  represents that it  has not
             taken, and the Authority covenants and  agrees that it will not
             take, any  action which results in  interest paid  on the Bonds
             being included in gross income of  the Owners of the  Bonds for
             federal tax  purposes pursuant to Sections  103 and  141 of the
             Code or to  Section 103 of the 1954 Code and Title  XIII of the
             Tax Reform  Act of  1986,  as applicable,  and any  regulations
             thereunder; and  the Company certifies  and represents that  it
             has not taken or (to the  extent within its control)  permitted
             to be taken, and the Company covenants  and agrees that it will
             not take or  (to the extent  within its control)  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, however,  that neither the Company nor  the
             Authority shall  be deemed to  have violated these covenants 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
             103(b)(13)  of the  1954 Code and provided,  further, that none
             of the covenants and agreements herein contained shall  require
             either the Company or the Authority  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 7.08  of the  Indenture  and
             agrees to  perform all  duties imposed  on it  by such  Section
             7.08,  by this  Section and by  the Tax Agreement.   Insofar as
             Section  7.08 of  the Indenture  and  the Tax  Agreement impose
             duties   and  responsibilities   on  the   Company,   they  are
             specifically incorporated herein by reference.

               (d)  Notwithstanding any provision of this Section  6.04  and
             Section 7.08 of the Indenture, if  the Company shall provide to
             the  Authority and the  Trustee an  opinion of  Bond Counsel to
             the  effect  that any  specified  action  required  under  this
             Section  6.04 and Section  7.08 of  the Indenture  is no longer
             required or that some further  or different action  is required
             to maintain  the tax-exempt status  of interest  on the  Bonds,
             the Company,  the Trustee  and the  Authority may  conclusively
             rely upon  such opinion  in complying with the  requirements of
             this Section 6.04, and  the covenants hereunder shall be deemed
             to be modified to that extent.

             SECTION  6.05.  Use  of Facilities.   So long as any Bonds are
          Outstanding and the Facilities are operated by or for the benefit
          of the Company, the Company shall cause the Facilities to be used
          for purposes contemplated by the Act and in the Tax Agreement.

             SECTION 6.06.   Financing  Statements.  The Company shall file
          and  record, or  cause to  be filed  and recorded,  all financing
          statements and  continuation  statements referred  to in  Section
          7.07 of the Indenture.

                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING

             SECTION  7.01.   Conditions.  The  Company's interest  in this
          Agreement may be assigned as a whole or in part, and its interest
          in the Facilities  may be leased, sold,  transferred or otherwise
          disposed of  by the Company  as a  whole or in  part (whether  an
          interest in a specific element or unit or an undivided interest),
          to any Person; provided, however, that no such assignment, lease,
          sale, transfer or other disposition (a) shall relieve the Company
          from its primary liability for its obligations under Section 5.01
          hereof  or  (b)  shall  be  made  unless  the  assignee,  lessee,
          purchaser or  other transferee, as the  case may be, prior  to or
          simultaneously  with such  assignment,  lease, sale,  transfer or
          other  disposition,  assumes, by  delivery  of  an instrument  in
          writing  satisfactory in form  to the Trustee  and the Authority,
          all other obligations of  the Company hereunder to the  extent of
          the  interest assigned,  leased, sold,  transferred  or otherwise
          disposed  of, and the Company shall be released of and discharged
          from such obligations to the extent  so assumed.  Notwithstanding
          the  foregoing,  (a)  if  (i)  the  Company's  interest  in  this
          Agreement shall be assigned as a whole or in undivided part, (ii)
          the Company's interest  in the  Facilities shall be  leased as  a
          whole or in undivided part and  the term of such leasehold or the
          term of any extension or extensions thereof at  the option of the
          Company shall extend  beyond the  maturity date of  the Bonds  or
          (iii)  the Company's  interest in  the Facilities shall  be sold,
          transferred or otherwise disposed  of as a whole or  in undivided
          part, and (b) in  the event that the assignee,  lessee, purchaser
          or  other transferee shall assume the  obligations of the Company
          under  Section  5.01  hereof  for  the  remaining  term  of  this
          Agreement,  to  the  extent  of  such  assignment,  lease,  sale,
          transfer or other disposition, the Company shall be released from
          and discharged of all liability in respect of such obligations to
          the  extent so  assumed  (but  only  to such  extent);  provided,
          however, that the release  and discharge of the Company  pursuant
          to  clause  (b) shall  be conditioned  upon  the delivery  by the
          Company to the Authority  and the Trustee of a  certificate of an
          Independent  Expert  (as   hereinafter  defined)  describing  the
          interests so  assigned,  leased, sold,  transferred or  otherwise
          disposed of,  together with  all other rights,  interests, assets
          and/or   properties  assigned,   leased,  sold,   transferred  or
          otherwise disposed of by  the Company to  the same Person in  the
          same  or  a  related   transaction,  stating  that  such  rights,
          interests,  assets  and/or  properties  so  described  constitute
          facilities for  the generation, transmission  and/or distribution
          of  electric  energy and  stating that,  in  the opinion  of such
          Independent Expert,  the Fair  Value (as hereinafter  defined) of
          such rights,  interests, assets  and/or properties to  the Person
          acquiring the  same is not less  than an amount equal  to 10/7 of
          the sum of  (x) the aggregate principal amount of  the Bonds then
          Outstanding and (y) the outstanding principal amount of all other
          obligations of the Company representing indebtedness for borrowed
          money  or for the deferred  purchase price of  property which are
          being assumed by  such Person; provided, further,  that after any
          such assumption, release and  discharge as aforesaid, the Company
          may again assume such  obligations under Section 5.01 hereof,  in
          whole or in part, at any time  and from time to time, and, to the
          extent of  any such assumption by  the Company (but only  to such
          extent),  the  aforesaid  assignee,  lessee, purchaser  or  other
          transferee shall be released from and discharged of all liability
          in respect of such obligations.

             Anything  herein to  the contrary notwithstanding, the Company
          shall not make any  assignment, lease or sale as provided  in the
          immediately preceding paragraph unless it shall have furnished to
          the Authority and  the Trustee an opinion of  Bond Counsel to the
          effect  that  the proposed  assignment,  lease or  sale  will not
          impair  the validity  under the  Act of  the Bonds  and  will not
          adversely  affect the  exclusion of  interest  on the  Bonds from
          gross income for federal tax purposes.

             After any  lease, sale,  transfer or other disposition of  any
          element or unit of  the Facilities, or any interest  therein, the
          Company  may, at  its  option, cause  such  element or  unit,  or
          interest  therein,  to no  longer  be deemed  to be  part  of the
          Facilities for the  purposes of this  Agreement by delivering  to
          the  Authority and the Trustee the  agreements or other documents
          required  pursuant  to  Section  7.02  hereof  together  with  an
          instrument signed by an Authorized Company Representative stating
          that such element or  unit, or interest therein, shall  no longer
          be deemed to be part  of the Facilities for the purposes  of this
          Agreement.

             For purposes of this Section 7.01:

               (a)  "Independent  Expert" means  a  Person which  (i) is  an
             engineer, appraiser or other expert  and which, with respect to
             any certificate to be  delivered pursuant to  this Section,  is
             qualified  to   pass  upon  the  matter   set  forth  in   such
             certificate and  (ii)(A) is  in fact independent, (B)  does not
             have any direct  material financial interest in the  transferee
             or in any obligor upon the Bonds or under this Agreement or  in
             any  affiliate of the  transferee or  any such  obligor, (C) is
             not  connected with the  transferee or  any such  obligor as an
             officer,  employee,  promoter, underwriter,  trustee,  partner,
             director or any person performing  similar functions and (D) is
             approved by  the Trustee in  the exercise  of reasonable  care;
             for  purposes of  this  definition "engineer"  means  a  Person
             engaged in  the engineering profession  or otherwise  qualified
             to pass  upon engineering matters  (including, but not  limited
             to, a Person  licensed as a  professional engineer,  whether or
             not  then  engaged in  the  engineering  profession);  and  for
             purposes of this definition "appraiser" means a Person  engaged
             in the business  of appraising property or otherwise  qualified
             to pass upon the Fair Value or fair market value of property.

               (b)  "Fair  Value" means  the fair  value  of the  interests,
             rights,  assets   and/or  properties  assigned,  leased,  sold,
             transferred  or otherwise disposed  of (but,  in the  case of a
             lease, only to the extent  of such lease) as  may be determined
             by reference to (i) except in the case  of a lease, the  amount
             which  would  be  likely  to  be  obtained  in an  arm's-length
             transaction with  respect  to  such interests,  rights,  assets
             and/or properties between an informed and willing buyer and  an
             informed   and   willing   seller,    under   no    compulsion,
             respectively, to buy or sell, (ii) in the case of a lease,  the
             amount (discounted  to present value at  a rate  not lower than
             the taxable  equivalent of the yield  to maturity  of the Bonds
             based  on prevailing  market prices  immediately prior  to  the
             first  public announcement  of the  proposed transaction) which
             would be likely to  be obtained in  an arm's-length transaction
             with  respect   to  such   interests,  rights,   assets  and/or
             properties  between  an informed  and  willing  lessee  and  an
             informed and  willing lessor, neither  under any compulsion  to
             lease;  (iii) the  amount  of investment  with respect  to such
             interests,  rights,  assets  and/or properties  which, together
             with  a reasonable  return  thereon,  would  be  likely  to  be
             recovered through  ordinary business  operations or  otherwise,
             (iv) the  cost, accumulated  depreciation and  replacement cost
             with   respect  to   such  interests,  rights,   assets  and/or
             properties  and/or (v)  any other  relevant  factors; provided,
             however,  that  (x) Fair  Value  shall  be  determined  without
             deduction for  any mortgage,  deed of  trust, pledge,  security
             interest,   encumbrance,   lease,   reservation,   restriction,
             servitude,  charge or similar  right or  any other  lien of any
             kind and  (y) the Fair Value to the transferee  of any property
             shall not reflect any reduction relating  to the fact that such
             property may be  of less value  to a  Person which  is not  the
             owner, lessee  or  operator  of  the property  or  any  portion
             thereof  than  to a  Person  which  is  such  owner, lessee  or
             operator.   Fair  Value  may be  determined,  without  physical
             inspection, by  the use of  accounting and engineering  records
             and other data maintained by the  Company or the transferee  or
             otherwise  available to  the Independent Expert  certifying the
             same.

             SECTION  7.02.   Instrument  Furnished  to  the Authority  and
          Trustee.  The Company  shall, within fifteen (15) days  after the
          delivery thereof, furnish to the Authority and the Trustee a true
          and  complete   copy  of   the  agreements  or   other  documents
          effectuating any such assignment,  lease, sale, transfer or other
          disposition.  

             SECTION  7.03.   Limitation.    This  Agreement shall  not  be
          assigned nor shall the Facilities be leased, sold, transferred or
          otherwise disposed of, in whole or in part, except as provided in
          this Article VII or in Section 6.01 or 5.02 hereof.  This Article
          VII shall not apply to any sale, transfer or other disposition by
          the  Company of  all of  its assets,  as or  substantially as  an
          entirety, as contemplated in Section 6.01.


                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES

             SECTION 8.01.    Events of  Default.   Each of  the  following
          events shall constitute and  is referred to in this  Agreement as
          an "Event of Default": 

               (a)   a failure  by the  Company  to  make any  Loan Payment,
             which  failure shall  have resulted  in  an "Event  of Default"
             under clause (a) or (b) of Section 9.01 of the Indenture; 

               (b)   a failure  by the Company  to  pay when  due any amount
             required to  be paid  under this  Agreement or  to observe  and
             perform any covenant, condition or agreement  on its part to be
             observed  or  performed (other  than  a  failure  described  in
             clause  (a) above),  which failure shall continue  for a period
             of  sixty  (60) days  after  written  notice,  specifying  such
             failure and requesting  that it  be remedied,  shall have  been
             given to  the Company by the  Authority or  the Trustee, unless
             the Authority  and the  Trustee shall  agree in  writing to  an
             extension of  such period  prior to  its expiration;  provided,
             however, that the Authority and the  Trustee shall be deemed to
             have  agreed  to an  extension  of  such  period if  corrective
             action is  initiated by the Company  within such  period and is
             being diligently pursued; or 

               (c)   the  dissolution or  liquidation  of  the  Company,  or
             failure  by  the  Company  promptly  to  lift  any   execution,
             garnishment or  attachment of such  consequence as will  impair
             its ability to make any payments  under this Agreement, or  the
             entry  of  an  order  for  relief   by  a  court  of  competent
             jurisdiction  in   any  proceeding  for   its  liquidation   or
             reorganization under  the provisions of  any bankruptcy act  or
             under  any similar act  which may  be hereafter  enacted, or an
             assignment by the Company for the  benefit of its creditors, or
             the entry by the Company into  an agreement of composition with
             its  creditors (the  term "dissolution  or liquidation  of  the
             Company,"  as used in  this clause,  shall not  be construed to
             include  the  cessation  of  the  corporate  existence  of  the
             Company resulting either from  a merger or consolidation of the
             Company into or  with another corporation  or a  dissolution or
             liquidation  of the  Company following  a  transfer of  all  or
             substantially  all  its  assets  as  an  entirety,  under   the
             conditions permitting such  actions contained  in Section  6.01
             hereof).  

             SECTION 8.02.  Force Majeure.   The provisions of Section 8.01
          hereof  are subject to the following limitations: if by reason of
          acts of God; 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 Arizona, or any department,
          agency, political subdivision, court or official  of any of them,
          or  any  civil  or   military  authority;  insurrections;  riots;
          epidemics; landslides; lightning; earthquakes;  volcanoes; fires;
          hurricanes;  tornadoes;  storms;   floods;  washouts;   droughts;
          arrests;  restraint of government and people; civil disturbances;
          explosions; breakage or accident  to machinery; partial or entire
          failure of utilities; or any cause or event not reasonably within
          the control of the Company, the  Company is unable in whole or in
          part  to  carry  out  any  one  or  more  of  its  agreements  or
          obligations contained  herein, other  than its  obligations under
          Sections 5.01, 5.03, 5.05, and 6.01 hereof, the Company shall not
          be deemed in default by reason of not carrying out said agreement
          or agreements or performing said obligation or obligations during
          the continuance  of  such  inability.   The  Company  shall  make
          reasonable  effort to  remedy  with all  reasonable dispatch  the
          cause  or causes preventing it  from carrying out its agreements;
          provided,  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.

             SECTION  8.03.    Remedies.    (a)   Upon  the  occurrence and
          continuance  of any Event of  Default described in  clause (a) of
          Section 8.01  hereof,  and further  upon the  condition that,  in
          accordance  with the terms of the Indenture, the Bonds shall have
          been declared to be  immediately due and payable pursuant  to any
          provision  of the  Indenture,  the Loan  Payments shall,  without
          further action, become and be immediately due and payable.  

             Any waiver of any "Event of Default" under the Indenture and a
          rescission and  annulment of its consequences  shall constitute a
          waiver of the corresponding Event or Events of Default under this
          Agreement  and a  rescission  and annulment  of the  consequences
          thereof.  

             (b)   Upon  the occurrence  and continuance  of any  Event  of
          Default, the Authority, or the Trustee with respect to the rights
          of  the Authority assigned to  the Trustee by  the Indenture, may
          take any  action at law or in equity to collect any payments then
          due and thereafter to  become due, or to enforce  performance and
          observance  of  any  obligation,  agreement or  covenant  of  the
          Company hereunder.

             (c)   Any amounts  collected by the Trustee  from the  Company
          pursuant to this Section 8.03 shall be applied in accordance with
          the Indenture.  

             SECTION 8.04.  No Remedy Exclusive.  No remedy conferred  upon
          or reserved to the  Authority hereby 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 hereunder 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 or power may be exercised from time to time and as
          often  as  may be  deemed  expedient.   In  order to  entitle the
          Authority to exercise any  remedy reserved to it in  this Article
          VIII, it shall  not be necessary to  give any notice,  other than
          such notice as may be herein expressly required.

             SECTION 8.05.   Reimbursement of Attorneys' and Agents'  Fees.
          If the Company shall  default under any of the  provisions hereof
          and the Authority or the Trustee shall employ attorneys or agents
          or incur other reasonable expenses for the collection of payments
          due hereunder or for the enforcement of performance or observance
          of  any  obligation  or agreement  on  the  part  of the  Company
          contained herein,  the Company will on  demand therefor reimburse
          the  Authority or the Trustee and any predecessor Trustee, as the
          case may  be, for the reasonable fees  of such attorneys and such
          other reasonable expenses so incurred.  

             SECTION 8.06.  Waiver  of Breach.  In the event any obligation
          created hereby shall  be breached  by either of  the parties  and
          such breach shall thereafter  be waived by the other  party, such
          waiver  shall be limited to  the particular breach  so waived and
          shall not be deemed to waive any other breach hereunder.  In view
          of the  assignment  of  certain  of the  Authority's  rights  and
          interest  hereunder to the  Trustee, the Authority  shall have no
          power to waive any breach hereunder by the  Company in respect of
          such  rights and interest without the consent of the Trustee, and
          the  Trustee may  exercise any  of such  rights of  the Authority
          hereunder.  


                                      ARTICLE IX

                                 REDEMPTION OF BONDS

             SECTION 9.01.  Redemption of Bonds.   The Authority shall take,
          or  cause to be  taken, the actions required  by the Indenture to
          discharge  the lien  created thereby  through the  redemption, or
          provision  for   payment  or   redemption,  of  all   Bonds  then
          Outstanding,  or  to  effect  the redemption,  or  provision  for
          payment  or  redemption,  of   less  than  all  the   Bonds  then
          Outstanding,  upon receipt by the Authority  and the Trustee from
          the Company of a  notice designating the principal amount  of the
          Bonds to be  redeemed, or for the payment  or redemption of which
          provision is to be made, and, in the case of redemption of Bonds,
          or provision therefor, specifying the date of  redemption and the
          applicable  redemption   provision  of  the   Indenture.     Such
          redemption date shall not be less than 45 days from the date such
          notice is given (unless  a shorter notice is satisfactory  to the
          Trustee).  Unless otherwise stated therein,  such notice shall be
          revocable by the  Company at any time prior to  the time at which
          the Bonds  to be redeemed,  or for  the payment or  redemption of
          which provision is  to be made,  are first deemed  to be paid  in
          accordance with Article VIII of the Indenture.  The Company shall
          furnish any moneys or Government  Obligations (as defined in  the
          Indenture)  required by  the Indenture to  be deposited  with the
          Trustee or otherwise paid by the Authority in connection with any
          of the foregoing purposes.  

             SECTION  9.02.   Compliance  with the  Indenture.  Anything in
          this Agreement to the contrary notwithstanding, the Authority and
          the Company shall take all actions required by this Agreement and
          the  Indenture  in order  to comply  with  any provisions  of the
          Indenture requiring the mandatory redemption of Bonds.


                                      ARTICLE X

                                    MISCELLANEOUS

             SECTION  10.01.   Term  of  Agreement.  This  Agreement  shall
          remain in  full force and effect  from the date hereof  until the
          right,  title and interest  of the  Trustee in  and to  the Trust
          Estate  (as   defined  in  the  Indenture)   shall  have  ceased,
          terminated and become void in accordance with Article VIII of the
          Indenture and  until all  payments required under  this Agreement
          shall  have  been  made.    Notwithstanding  the  foregoing,  the
          covenants contained in Section 5.03, 5.04, Section 6.04 and  8.05
          hereof shall survive the termination of this Agreement.

             SECTION 10.02.  Notices.  Except as otherwise provided in this
          Agreement, all notices,  certificates, requests, requisitions and
          other communications hereunder  shall be in writing and  shall be
          sufficiently  given  and shall  be  deemed given  when  mailed by
          registered mail, postage prepaid, addressed as follows: if to the
          Authority,  c/o Russo, Cox &  Russo, P.C., 1820  East River Road,
          Suite 230, Tucson,  Arizona 85718; if to the Company, at 220 West
          Sixth Street,  Tucson, Arizona 85702, Attention:   Treasurer; and
          if to the Trustee, at  such address as shall be designated  by it
          in the Indenture.  A copy of each notice, certificate, request or
          other  communication  given  hereunder  to  the  Authority,   the
          Company, or the Trustee shall  also be given to the others.   The
          Authority,  the Company,  and the  Trustee may,  by  notice given
          hereunder, designate any further  or different addresses to which
          subsequent    notices,    certificates,    requests   or    other
          communications shall be sent.

             SECTION  10.03.   Parties in  Interest.  This Agreement  shall
          inure to the benefit of and  shall be binding upon the Authority,
          the  Company and their respective successors  and assigns, and no
          other person, firm or corporation shall have any right, remedy or
          claim under or  by reason of  this Agreement; provided,  however,
          that  the rights and remedies granted to the Authority in Article
          VIII hereof, shall inure to the benefit of the Trustee, on behalf
          of the  Owners from  time  to time  of the  Bonds,  and shall  be
          enforceable by the  Trustee as  a third party  beneficiary or  as
          assignee of  the Authority;  and provided, further,  that neither
          Pima  County, Arizona nor the State of Arizona shall in any event
          be liable for the payment of the principal of or premium, if any,
          or interest  on the Bonds or  for the performance of  any pledge,
          mortgage, obligation or  agreement created by  or arising out  of
          this Agreement or  the issuance  of the Bonds,  and further  that
          neither the Bonds  nor any  such obligation or  agreement of  the
          Authority  shall be  construed to  constitute an  indebtedness of
          Pima County, Arizona or  the State of Arizona within  the meaning
          of  any constitutional  or statutory  provisions  whatsoever, but
          shall be limited obligations of the  Authority payable solely out
          of the revenues derived from this Agreement, or from the  sale of
          the Bonds, or from  the investment or reinvestment of  any of the
          foregoing, as provided herein and in the Indenture.  

             SECTION 10.04.    Amendments.   This Agreement may be  amended
          only by written agreement  of the parties hereto, subject  to the
          limitations set forth herein and in the Indenture. 

             SECTION 10.05.  Counterparts.   This Agreement may be executed
          in  any number of counterparts,  each of which,  when so executed
          and delivered, shall be an  original; but such counterparts shall
          together constitute but one and the same Agreement.

             SECTION  10.06.   Severability.   If  any clause, provision or
          section  of this Agreement shall, for any reason, be held illegal
          or invalid by  any court,  the illegality or  invalidity of  such
          clause,  provision  or  section  shall  not  affect  any  of  the
          remaining  clauses,  provisions  or  sections  hereof,  and  this
          Agreement shall be construed  and enforced as if such  illegal or
          invalid  clause,  provision or  section  had  not been  contained
          herein.   In case any  agreement or obligation  contained in this
          Agreement be held to  be in violation of law, then such agreement
          or obligation shall be  deemed to be the agreement  or obligation
          of  the Authority or the Company, as the case may be, to the full
          extent permitted by law.

             SECTION  10.07.  Governing Law.    The  laws of  the State  of
          Arizona  shall govern  the construction  and enforcement  of this
          Agreement,  except that  the provisions  of Section 13.09  of the
          Indenture,  construed  as  provided   in  Section  13.07  of  the
          Indenture, shall apply to this Agreement as if contained herein.

             SECTION  10.08.   Notice Regarding Cancellation of  Contracts.
          As required by  the provisions of Section 38-511, Arizona Revised
          Statutes,  as  amended, notice  is  hereby  given that  political
          subdivisions  of the State of Arizona or any of their departments
          or  agencies may, within three (3) years of its execution, cancel
          any contract,  without penalty or further obligation, made by the
          political subdivisions or any of their departments or agencies on
          or after September 30, 1988, if any person significantly involved
          in  initiating, negotiating,  securing, drafting or  creating the
          contract  on behalf of the political subdivisions or any of their
          departments or agencies is, at any time while the contract or any
          extension of the contract is  in effect, an employee or  agent of
          any  other party to the contract in  any capacity or a consultant
          to any  other party of the  contract with respect to  the subject
          matter of the contract.  The cancellation shall be effective when
          written notice from the chief executive officer or governing body
          of  the political subdivision is received by all other parties to
          the contract unless the notice specifies a later time.

             The Company covenants and agrees not to employ as an employee,
          agent or, with respect to the subject matter of this Agreement, a
          consultant,  any  person  significantly  involved  in initiating,
          negotiating, securing,  drafting or  creating  such Agreement  on
          behalf of the Authority within three (3) years from the execution
          hereof, unless a waiver is provided by the Authority.

          <PAGE>

             IN WITNESS WHEREOF, the  parties hereto have caused this  Loan
          Agreement to be duly executed as  of the day and year first above
          written.

                                       THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                          OF THE COUNTY OF PIMA


                                       By:  /s/ Stanley Lehman
                                           --------------------------
                                            President



                                       TUCSON ELECTRIC POWER COMPANY


                                       By:  /s/ Kevin Larson
                                           --------------------------
                                            Vice President

          <PAGE>

                                                                  EXHIBIT A


             A  portion of  the costs  of the construction,  improvement or
          equipping of the following Facilities will be refinanced with the
          proceeds of the Industrial Development Revenue Bonds, 1997 Series
          B  (Tucson   Electric  Power  Company  Project)   issued  by  The
          Industrial  Development  Authority  of  the County  of  Pima  and
          referred to in the foregoing Loan Agreement.

                                 --------------------


             Certain  additions  and improvements  to  the  Company's  low-
          voltage transmission  and distribution facilities in  the City of
          Tucson  and environs  in  Pima County  and  to Fort  Huachuca  in
          adjacent Cochise  County, Arizona and  additions and improvements
          to  the  Irvington  Generating Station  located  in  the  City of
          Tucson, more  particularly described  in the Tax  Certificate and
          Agreement, dated as  of October 1,  1997, between The  Industrial
          Development  Authority of the County of  Pima and Tucson Electric
          Power Company.



                                                              Exhibit 4d
===============================================================================

                          INDENTURE OF TRUST
                            (1997 SERIES B)


                                BETWEEN



                 THE INDUSTRIAL DEVELOPMENT AUTHORITY
                         OF THE COUNTY OF PIMA



                                  AND



                FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION




                        ---------------------




                    DATED AS OF SEPTEMBER 15, 1997




                        ---------------------




                              AUTHORIZING

                 INDUSTRIAL DEVELOPMENT REVENUE BONDS,
                             1997 SERIES B
                   (TUCSON ELECTRIC POWER COMPANY PROJECT)



=============================================================================

<PAGE>

                          TABLE OF CONTENTS*

                                                                          Page
                                                                          ----

   Parties.................................................................. 1
   Recitals................................................................. 1
   Granting Clause.......................................................... 2


                               ARTICLE I

                              DEFINITIONS

   Section 1.01.     Definitions...........................................  2

                              ARTICLE II

                               THE BONDS

   Section 2.01.     Creation of Bonds.....................................  8
   Section 2.02.     Form of Bonds.........................................  8
   Section 2.03.     Execution of Bonds....................................  9
   Section 2.04.     Authentication of Bonds...............................  9
   Section 2.05.     Bonds Not General Obligations.........................  9
   Section 2.06.     Prerequisites to Authentication of Bonds..............  9
   Section 2.07.     Lost or Destroyed Bonds or Bonds Canceled in
      Error................................................................ 10
   Section 2.08.     Transfer, Registration and Exchange of Bonds.......... 10
   Section 2.09.     Other Obligations..................................... 12
   Section 2.10   Temporary Bonds.......................................... 12
   Section 2.11.     Cancellation of Bonds................................. 12
   Section 2.12.     Payment of Principal and Interest..................... 13
   Section 2.13.     Applicability of Book-Entry Provisions................ 13


                              ARTICLE III

                          REDEMPTION OF BONDS

   Section 3.01.     Redemption Provisions................................. 13
   Section 3.02.     Selection of Bonds to be Redeemed..................... 14
   Section 3.03.     Procedure for Redemption.............................. 15
   Section 3.04.     Payment of Redemption Price........................... 15
   Section 3.05.     No Partial Redemption After Default................... 15

                              ARTICLE IV

                             THE BOND FUND

- --------------------------

*   This table of contents is not a part of the Indenture, and is for
    convenience only. The captions herein are of no legal effect and
    do not vary the meaning or legal effect of any part of the
    Indenture.


<PAGE>


   Section 4.01.     Creation of Bond Fund................................. 16
   Section 4.02.     Liens................................................. 16
   Section 4.03.     Deposits into Bond Fund............................... 16
   Section 4.04.     Use of Moneys in Bond Fund............................ 16
   Section 4.05.     Custody of Bond Fund; Withdrawal of Moneys............ 16
   Section 4.06.     Bonds Not Presented for Payment....................... 16
   Section 4.07.     Moneys Held in Trust.................................. 17

                               ARTICLE V

                        DISPOSITION OF PROCEEDS

   Section 5.01.     Disposition of Proceeds............................... 17

                              ARTICLE VI

                              INVESTMENTS

   Section 6.01.     Investments........................................... 17

                              ARTICLE VII

                           GENERAL COVENANTS

   Section 7.01.     No General Obligations................................ 18
   Section 7.02.     Performance of Covenants of the Authority;
                     Representations....................................... 18
   Section 7.03.     Maintenance of Rights and Powers; Compliance
                     with Laws............................................. 18
   Section 7.04.     Enforcement of Obligations of the Company;
                     Amendments............................................ 19
   Section 7.05.     Further Instruments................................... 19
   Section 7.06.     No Disposition of Trust Estate........................ 19
   Section 7.07.     Financing Statements.  ............................... 19
   Section 7.08.     Tax Covenants; Rebate Fund............................ 19
   Section 7.09.     Notices of Trustee.................................... 20

                             ARTICLE VIII

                              DEFEASANCE

   Section 8.01.     Defeasance............................................ 20

                              ARTICLE IX

                         DEFAULTS AND REMEDIES

   Section 9.01.     Events of Default..................................... 22
   Section 9.02.     Remedies.............................................. 23
   Section 9.03.     Restoration to Former Position........................ 23
   Section 9.04.     Owners' Right to Direct Proceedings................... 23
   Section 9.05.     Limitation on Owners' Right to Institute
                     Proceedings........................................... 23
   Section 9.06.     No Impairment of Right to Enforce Payment............. 24
   Section 9.07.     Proceedings by Trustee without Possession of
                     Bonds................................................. 24
   Section 9.08.     No Remedy Exclusive................................... 24
   Section 9.09.     No Waiver of Remedies................................. 24
   Section 9.10.     Application of Moneys................................. 24
   Section 9.11.     Severability of Remedies.............................. 25

                               ARTICLE X

             TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

   Section 10.01.    Acceptance of Trusts.................................. 25
   Section 10.02.    No Responsibility for Recitals........................ 25
   Section 10.03.    Limitations on Liability.............................. 26
   Section 10.04.    Compensation, Expenses and Advances................... 26
   Section 10.05.    Notice of Events of Default........................... 27
   Section 10.06.    Action by Trustee..................................... 27
   Section 10.07.    Good Faith Reliance................................... 27
   Section 10.08.    Dealings in Bonds and with the Authority and
                     the Company........................................... 27
   Section 10.09.    Allowance of Interest................................. 28
   Section 10.10.    Construction of Indenture............................. 28
   Section 10.11.    Resignation of Trustee................................ 28
   Section 10.12.    Removal of Trustee.................................... 28
   Section 10.13.    Appointment of Successor Trustee...................... 28
   Section 10.14.    Qualifications of Successor Trustee................... 29
   Section 10.15.    Judicial Appointment of Successor Trustee............. 29
   Section 10.16.    Acceptance of Trusts by Successor Trustee............. 29
   Section 10.17.    Successor by Merger or Consolidation.................. 29
   Section 10.18.    Standard of Care...................................... 30
   Section 10.19.    Notice to Owners of Bonds of Event of
                     Default............................................... 30
   Section 10.20.    Intervention in Litigation of the Authority........... 30
   Section 10.21.    Paying Agent; Co-Paying Agents........................ 30
   Section 10.22.    Qualifications of Paying Agent and Co-Paying
                     Agents; Resignation; Removal.......................... 31
   Section 10.23.    Registrar............................................. 31
   Section 10.24.    Qualifications of Registrar; Resignation;
                     Removal............................................... 32
   Section 10.25.    Several Capacities.................................... 32

                              ARTICLE XI

                EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                      PROOF OF OWNERSHIP OF BONDS

   Section 11.01.    Execution of Instruments; Proof of Ownership.......... 32

                              ARTICLE XII

             MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

   Section 12.01.    Limitations........................................... 33
   Section 12.02.    Supplemental Indentures without Owner
                     Consent............................................... 33
   Section 12.03.    Supplemental Indentures with Consent of
                     Owners................................................ 34
   Section 12.04.    Effect of Supplemental Indenture...................... 35
   Section 12.05.    Consent of the Company................................ 35
   Section 12.06.    Amendment of Loan Agreement without Consent
                     of Owners............................................. 35
   Section 12.07.    Amendment of Loan Agreement with Consent of
                     Owners................................................ 35
                     

                             ARTICLE XIII

                             MISCELLANEOUS

   Section 13.01.    Successors of the Authority........................... 36
   Section 13.02.    Parties in Interest................................... 36
   Section 13.03.    Severability.......................................... 36
   Section 13.04.    No Personal Liability of Authority Officials.......... 36
   Section 13.05.    Bonds Owned by the Authority or the Company........... 36
   Section 13.06.    Counterparts.......................................... 37
   Section 13.07.    Governing Law......................................... 37
   Section 13.08.    Notices............................................... 37
   Section 13.09.    Holidays.............................................. 37
   Section 13.10.    Statutory Notice Regarding Cancellation of
                     Contracts.  .......................................... 38


Testimonium..............................................................   40
Signatures and Seals.....................................................   40

Exhibit A - Form of Bond...................................................A-1
Exhibit B - Form of Endorsement of Transfer................................B-1
Exhibit C - Form of Certificate of Authentication..........................C-1

      
<PAGE>



                          INDENTURE OF TRUST

     THIS INDENTURE OF TRUST (1997 B Series), dated as of September
15, 1997 (this "Indenture"), between THE INDUSTRIAL DEVELOPMENT
AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation
designated by law as a political subdivision of the State of Arizona
(hereinafter called the "Authority"), and First Trust of New York,
National Association, as trustee (hereinafter called the "Trustee"),

                         W I T N E S S E T H :


     WHEREAS, the Authority is authorized and empowered under Title
35, Chapter 5, Arizona Revised Statutes, as amended (the "Act"), to
issue its bonds in accordance with the Act and to make secured or
unsecured loans for the purpose of financing or refinancing the
acquisition, construction, improvement or equipping of projects
consisting of land, any building or other improvement, and all real
and personal properties, including but not limited to machinery and
equipment, whether or not now in existence or under construction,
whether located within or without Pima County, which shall be suitable
for, among other things, facilities for the furnishing of electric
energy, gas or water, air and water pollution control facilities and
sewage and solid waste disposal facilities, and to charge and collect
interest on such loans and pledge the proceeds of loan agreements as
security for the payment of the principal of and interest on bonds, or
designated issues of bonds, issued by the Authority and any agreements
made in connection therewith, whenever the Board of Directors of the
Authority finds such loans to be in furtherance of the purposes of the
Authority or in the public interest;

     WHEREAS, the Authority has heretofore issued and sold $75,000,000
aggregate principal amount of its Industrial Development Revenue
Bonds, 1982 Series A (Tucson Electric Power Company General Project)
all of which remain outstanding (the "1982 Bonds due June 15, 2022"),
the proceeds of which were loaned to Tucson Electric Power Company, an
Arizona corporation (the "Company") to finance and refinance a portion
of the costs of the acquisition, construction, improvement and
equipping of certain of its facilities for the furnishing of electric
energy (the "Facilities");

     WHEREAS, the Authority has also heretofore issued and sold
$75,000,000 aggregate principal amount of its Industrial Development
Revenue Bonds, 1982 Series A (Tucson Electric Power Company General
Project) all of which remain outstanding (the "1982 Bonds due July 1,
2022", and together with the 1982 Bonds due June 15, 2022, hereinafter
collectively referred to as the "1982 Bonds"), the proceeds of which
were loaned to the Company to finance certain additional costs of the
Facilities; and

     WHEREAS, the Authority proposes to issue and sell its revenue
bonds as provided herein (the "Bonds") to refinance, by the payment or
redemption of the 1982 Bonds, or provision therefor, the portion of
the costs of the acquisition, construction, improvement and equipping
of the Facilities paid from the proceeds of the 1982 Bonds, all as
described in Exhibit A to the Loan Agreement, dated as of September
15, 1997 (the "Loan Agreement"), between the Authority and the
Company;

     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 Owners (as hereinafter defined) thereof and of the
sum of one dollar lawful money of the United States of America, to it
duly paid by the Trustee at or before the execution and delivery of
these presents, and for other good and valuable consideration the
receipt and sufficiency of which are 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 Authority of all the covenants and
conditions expressed or implied herein and contained in the Bonds, the
Authority does hereby grant, bargain, sell, convey, mortgage, pledge
and assign, and grant a security interest in, the Trust Estate (as
hereinafter defined) to the Trustee, its successors in trust and their
assigns forever;

     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, first, for the equal and proportionate benefit and security of
all Owners of the Bonds issued under and secured by this Indenture
without preference, priority or distinction as to the 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 VIII hereof, the
principal of and premium, if any, and interest on the Bonds shall have
been paid to the Owners thereof, or shall have been paid to the
Company pursuant to Section 4.06 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 Authority and
the Company such instruments in writing as shall be requisite to
evidence the discharge hereof; otherwise this Indenture is 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 as
hereinafter expressed, and the Authority has agreed and covenanted,
and does hereby agree and covenant, with the Trustee and with the
respective Owners, from time to time, of the Bonds, as follows:


                               ARTICLE I

                              DEFINITIONS

     Section 1.01. Definitions. The terms defined in this Article I
shall, for all purposes of this Indenture, have the meanings herein
specified, unless the context clearly requires otherwise:

Act:

     "Act" shall mean Title 35, Chapter 5, Arizona Revised Statutes,
and all acts supplemental thereto or amendatory thereof.

Administration Expenses:

     "Administration Expenses" shall mean the reasonable expenses
incurred by the Authority with respect to the Loan Agreement, this
Indenture and any transaction or event contemplated by the Loan
Agreement or this Indenture, including the compensation and
reimbursement of expenses and advances payable to the Trustee, to the
Paying Agent, any Co-Paying Agent and the Registrar and a pro rata
share of the Authority's annual operating expenses in accordance with
the provisions of paragraph XII.D. of the Authority's Procedural
Pamphlet.

     "Authority" shall mean The Industrial Development Authority of
the County of Pima, an Arizona nonprofit corporation designated by law
as a political subdivision of the State of Arizona incorporated for
and with the approval of Pima County, Arizona, pursuant to the
provisions of the Constitution of the State of Arizona and the Act,
its successors and their assigns.

Authorized Company Representative:

     "Authorized Company Representative" shall mean each person at the
time designated to act on behalf of the Company by written certificate
furnished to the Authority and the Trustee containing the specimen
signature of such person and signed on behalf of the Company by its
President, any Vice President or its Treasurer, together with its
Secretary or any Assistant Secretary.

Bond Counsel:

     "Bond Counsel" shall mean any firm or firms of nationally
recognized bond counsel experienced in matters pertaining to the
validity of, and exclusion from gross income for federal tax purposes
of interest on bonds issued by states and political subdivisions,
selected by the Company and acceptable to the Authority.

Bond Fund:

"Bond Fund" shall mean the fund created by Section 4.01 hereof.

Bonds:

     "Bond" or "Bonds" shall mean the bonds authorized to be issued
under this Indenture.

Code:

     "Code" shall mean the Internal Revenue Code of 1986 or any
successor statute thereto. Each reference to a section of the Code
herein shall be deemed to include the United States Treasury
Regulations proposed or in effect thereunder and applicable to the
Bonds or the use of proceeds thereof, unless the context clearly
requires otherwise. References to any particular Code section shall,
in the event of a successor Code, be deemed to be a reference to the
successor to such Code section.

Company:

     "Company" shall mean Tucson Electric Power Company, a corporation
organized and existing under the laws of the State of Arizona, its
successors and their assigns, including, without limitation, any
successor obligor under Section 6.01 or 7.01 of the Loan Agreement to
the extent of the obligations assumed thereunder.

Depositary:

     "Depositary" shall mean The Depository Trust Company or any
successor thereto as a securities repository for the Bonds.

Facilities:

     "Facilities" shall mean the real and personal properties,
machinery and equipment currently existing, under construction and to
be constructed which are described in Exhibit A to the Loan Agreement,
as revised from time to time to reflect any changes therein, additions
thereto, substitutions therefor and deletions therefrom permitted by
the terms of the Loan Agreement, subject, however, to the provisions
of Section 7.01 of the Loan Agreement.

Government Obligations:

     "Government Obligations" shall mean:

          (a) direct obligations of, or obligations the principal of
     and interest on which are unconditionally guaranteed by, the
     United States of America entitled to the benefit of the full
     faith and credit thereof; and

          (b) certificates, depositary receipts or other instruments
     which evidence a direct ownership interest in obligations
     described in clause (a) above or in any specific interest or
     principal payments due in respect thereof; provided, however,
     that the custodian of such obligations or specific interest or
     principal payments shall be a bank or trust company organized
     under the laws of the United States of America or of any state or
     territory thereof or of the District of Columbia, with a combined
     capital stock surplus and undivided profits of at least
     $50,000,000; and provided, further, that except as may be
     otherwise required by law, such custodian shall be obligated to
     pay to the holders of such certificates, depositary receipts or
     other instruments the full amount received by such custodian in
     respect of such obligations or specific payments and shall not be
     permitted to make any deduction therefrom.

Indenture:

     "Indenture" shall mean this Indenture of Trust, dated as of
September 15, 1997, between the Authority and the Trustee, and any and
all modifications, alterations, amendments and supplements thereto.

Investment Securities:

     "Investment Securities" shall mean any of the following
obligations or securities on which neither the Company nor any of its
subsidiaries is the obligor: (a) Government Obligations; (b) interest
bearing deposit accounts (which may be represented by certificates of
deposit) in national, state or foreign banks having a combined capital
and surplus of not less than $10,000,000; (c) bankers' acceptances
drawn on and accepted by commercial banks having a combined capital
and surplus of not less than $10,000,000; (d) (i) direct obligations
of, (ii) obligations the principal of and interest on which are
unconditionally guaranteed by, and (iii) any other obligations the
interest on which is exempt from federal income taxation issued by,
any state of the United States of America, the District of Columbia or
the Commonwealth of Puerto Rico, or any political subdivision, agency,
authority or other instrumentality of any of the foregoing, which, in
any case, are rated by a nationally recognized rating agency in any of
its three highest rating categories; (e) obligations of any agency or
instrumentality of the United States of America; (f) commercial or
finance company paper which is rated by a nationally recognized rating
agency in any of its three highest rating categories; (g) corporate
debt securities issued by corporations having debt securities rated by
a nationally recognized rating agency in any of its three highest
rating categories; (h) repurchase agreements with banking or financial
institutions having a combined capital and surplus of not less than
$10,000,000 with respect to any of the foregoing obligations or
securities; (i) shares or interests in registered investment companies
whose assets consist of obligations or securities which are described
in any other clause of this sentence; and (j) any other obligations
which may lawfully be purchased by the Trustee. The commercial banks
and banking institutions referred to above may include the entities
acting as Trustee, Paying Agent, Co-Paying Agent or Registrar
hereunder if such entities shall otherwise satisfy the requirements
set forth above.

Loan Agreement:

     "Loan Agreement" shall mean the Loan Agreement, dated as of
September 15, 1997, between the Authority and the Company relating to
the Bonds, and any and all modifications, alterations, amendments and
supplements thereto.

Loan Payments:

     "Loan Payments" shall mean the payments required to be made by
the Company pursuant to Section 5.01 of the Loan Agreement.

1954 Code:

     "1954 Code" shall mean the Internal Revenue Code of 1954, as
amended.

1982 Bonds:

     "1982 Bonds" shall mean the $75,000,000 aggregate principal
amount of the Authority's Industrial Development Revenue Bonds, 1982
Series A (Tucson Electric Power Company General Project) due June 15,
2022 and $75,000,000 aggregate principal amount of the Authority's
Industrial Development Revenue Bonds, 1982 A (Tucson Electric Power
Company General Project) due July 1, 2022.

Notice by Mail:

     "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 Owners of specified registered Bonds
at the addresses shown in the registration books maintained pursuant
to Section 2.08 hereof; 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, then such giving of notice in lieu
thereof, which may include publication, as shall be made with the
approval of the Trustee (or, if there be no trustee hereunder, the
Authority) shall constitute a sufficient giving of such notice.

Notice by Publication:

     "Notice by Publication" or "notice" of any action or condition
"by Publication" shall mean publication of a notice meeting the
requirements of this Indenture in a newspaper or financial journal of
general circulation in The City of New York, New York, which carries
financial news, is printed in the English language and is customarily
published on each business day; provided, however, that any successive
weekly publication of notice required hereunder may be made, unless
otherwise expressly provided herein, on the same or different days of
the week and in the same or different newspapers or financial
journals; and provided, further, that if, because of the temporary or
permanent suspension of the publication or general circulation of any
newspaper or financial journal or for any other reason, it is
impossible or impracticable to publish such notice in the manner
herein described, then such publication in lieu thereof as shall be
made with the approval of the Trustee (or, if there be no trustee
hereunder, the Authority) shall constitute a sufficient publication of
such notice.

Outstanding:

     "Outstanding", when used in reference to the Bonds, shall mean,
as at any particular date, the aggregate of all Bonds authenticated
and delivered under this Indenture except:

          (a) those canceled by the Trustee at or prior to such date
     or delivered to or acquired by the Trustee at or prior to such
     date for cancellation;

          (b) those deemed to be paid in accordance with Article VIII
     hereof; and

          (c) those in lieu of or in exchange or substitution for
     which other Bonds shall have been authenticated and delivered
     pursuant to this Indenture, unless proof satisfactory to the
     Trustee and the Company is presented that such Bonds are held by
     a bona fide holder in due course.

Owner:

     "Owner" shall mean the person in whose name any Bond is
registered upon the registration books maintained pursuant to Section
2.08 hereof. The Company may be an Owner.

Paying Agent; Co-Paying Agent; Principal Office thereof:

     "Paying Agent" and "Co-Paying Agent" shall mean the paying agent
and any co-paying agent appointed in accordance with Section 10.21
hereof. "Principal Office" of the Paying Agent or any Co-Paying Agent
shall mean the office thereof designated in writing to the Trustee.

Rebate Fund:

     "Rebate Fund" shall mean the fund created by Section 7.08 hereof.

Receipts and Revenues of the Authority from the Loan Agreement:

     "Receipts and Revenues of the Authority from the Loan Agreement"
shall mean all moneys paid or payable to the Trustee for the account
of the Authority by the Company in respect of the Loan Payments and
payments pursuant to Section 9.01 of the Loan Agreement and all
receipts of the Trustee which, under the provisions of this Indenture,
reduce the amount of such payments.

Record Date:

     "Record Date" shall mean the close of business on the fifteenth
(15th) day of the calendar month immediately preceding each regularly
scheduled interest payment date.

Registrar; Principal Office thereof:

     "Registrar" shall mean the registrar appointed in accordance with
Section 10.23 hereof. "Principal Office" of the Registrar shall mean
the office thereof designated in writing to the Trustee.

Supplemental Indenture:

     "Supplemental Indenture" shall mean any indenture of the
Authority modifying, altering, amending, supplementing or confirming
this Indenture for any purpose, in accordance with the terms hereof.

Supplemental Loan Agreement:

     "Supplemental Loan Agreement" shall mean any agreement between
the Authority and the Company modifying, altering, amending or
supplementing the Loan Agreement, in accordance with the terms thereof
and hereof.

Tax Agreement:

     "Tax Agreement" shall mean that tax certificate and agreement,
dated the date of the initial authentication and delivery of the
Bonds, between the Authority and the Company, relating to the
requirements of the Code and the 1954 Code, and any and all
modifications, alterations, amendments and supplements thereto.

Trust Estate:

     "Trust Estate" shall mean at any particular time all right, title
and interest of the Authority in and to the Loan Agreement (except its
rights under Sections 5.03, 5.04, 6.03 and 8.05 thereof and any rights
of the Authority to receive notices, certificates, requests,
requisitions and other communications thereunder), including without
limitation, the Receipts and Revenues of the Authority from the Loan
Agreement, the Bond Fund and all moneys and Investment Securities from
time to time on deposit therein (excluding, however, any moneys or
Investment Securities held in the Rebate Fund), any and all other
moneys and obligations (other than Bonds) which at such time are
deposited or are required to be deposited with, or are held or are
required to be held by or on behalf of, the Trustee, the Paying Agent
or any Co-Paying Agent in trust under any of the provisions of this
Indenture and all other rights, titles and interests which at such
time are subject to the lien of this Indenture; provided, however,
that in no event shall there be included in the Trust Estate (a)
moneys or obligations deposited with or held by the Trustee in the
Rebate Fund pursuant to Section 7.08 hereof or (b) moneys or
obligations deposited with or paid to the Trustee for the redemption
or payment of Bonds which are deemed to have been paid in accordance
with Article VIII hereof or moneys held pursuant to Section 4.06
hereof.

Trustee; Principal Office thereof:

     "Trustee" shall mean First Trust of New York, National
Association, as trustee under this Indenture, its successors in trust
and their assigns. "Principal Office" of the Trustee shall mean the
principal corporate trust office of the Trustee, which office at the
date of acceptance by the Trustee of the duties and obligations
imposed on the Trustee by this Indenture is located at the address
specified in Section 13.08 hereof.

                              ARTICLE II

                               THE BONDS

     Section 2.01. Creation of Bonds. There is hereby authorized and
created under this Indenture, for the purpose of providing moneys to
pay, or redeem, or provide for the redemption therefor, of the 1982
Bonds, an issue of Bonds, entitled to the benefit, protection and
security of this Indenture, in the aggregate principal amount of One
Hundred Fifty Million Dollars ($150,000,000). Each of the Bonds shall
be designated by the title "The Industrial Development Authority of
the County of Pima Industrial Development Revenue Bond, 1997 Series B
(Tucson Electric Power Company Project)". The Bonds shall mature,
subject to prior redemption upon the terms and conditions hereinafter
set forth, on September 1, 2029 and shall bear interest from the date
thereof 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, at the rate
of six per centum (6%) per annum, with interest thereon payable
semi-annually on each March 1 and September 1, commencing March 1,
1998. Interest shall be calculated on the basis of a 360-day year
consisting of twelve 30-day months.

     Section 2.02. Form of Bonds. Bonds shall be authenticated and
delivered hereunder solely as fully registered bonds without coupons
in the denomination of $5,000 or integral multiples thereof. Bonds
shall be numbered as determined by the Trustee. Bonds authenticated
prior to the first interest payment date shall be dated September 15,
1997. Bonds authenticated on or subsequent to the first interest
payment date shall be dated the interest payment date next preceding
the date of authentication thereof, unless such date of authentication
shall be an interest payment date to which interest on the Bonds has
been paid in full or duly provided for, in which case they shall be
dated such date of authentication; 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 be dated the date to which interest has been paid in
full on the Bonds surrendered.

     Principal of and premium, if any, on Bonds shall be payable to
the Owners of such Bonds upon presentation and surrender of such Bonds
at the Principal Office of the Paying Agent or any Co-Paying Agent.
Interest on the Bonds shall be paid by check drawn upon the Paying
Agent and mailed to the Owners of such Bonds as of the close of
business on the Record Date with respect to each interest payment date
at the registered addresses of such Owners as they shall appear as of
the close of business on such Record Date on the registration books
maintained pursuant to Section 2.08 hereof notwithstanding the
cancellation of any such Bond upon any exchange or registration of
transfer subsequent to such Record Date, except that if and to the
extent that there should be a default on the payment of interest on
any Bond, such defaulted interest shall be paid to the Owners in whose
name such Bond (or any Bond or Bonds issued upon any exchange or
registration of transfer thereof) is registered as of the close of
business on a date selected by the Trustee in its discretion, but not
more than 15 days or less than 10 days prior to the date of payment of
such defaulted interest; notwithstanding the foregoing, upon request
to the Paying Agent by an Owner of not less than $1,000,000 in
aggregate principal amount of Bonds, interest on such Bonds and, after
presentation and surrender of such Bonds, the principal thereof shall
be paid to such Owner by wire transfer to the account maintained
within the continental United States specified by such Owner or, if
such Owner maintains an account with the entity acting as Paying
Agent, by deposit into such account. Payment as aforesaid shall be
made in such coin or currency of the United States of America as, at
the respective times of payment, shall be legal tender for the payment
of public and private debts.

     The Bonds and the form for registration of transfer and the form
of certificate of authentication to be printed on the Bonds are to be
in substantially the forms thereof set forth in Exhibits A, B and C
hereto, respectively, with necessary or appropriate variations,
omissions and insertions as permitted or required by this Indenture.

     Section 2.03. Execution of Bonds. The Bonds shall be executed on
behalf of the Authority by the President or a Vice President of the
Authority and shall have affixed, impressed or reproduced thereon the
official seal of the Authority which shall be attested by the
Secretary or an Assistant Secretary of the Authority. Each of the
foregoing officers may execute or cause to be executed with a
facsimile signature in lieu of his manual signature the Bonds,
provided the signature of either the President or a Vice President of
the Authority or the Secretary or Assistant Secretary of the Authority
shall, if required by applicable laws, be manually subscribed.

     In case any officer of the Authority whose signature or a
facsimile of whose signature shall appear on the Bonds shall cease to
be such officer before the authentication by the Trustee and delivery
of such Bonds, such signature or such facsimile shall nevertheless be
valid and sufficient for all purposes, the same as if such officer had
remained in office until delivery; and any Bond may be signed on
behalf of the Authority by such persons as, at the time of execution
of such Bond, shall be the proper officers of the Authority, even
though at the date of such Bond or of the execution and delivery of
this Indenture any such person was not such officer.

     Section 2.04. Authentication of Bonds. Only such Bonds as shall
have endorsed thereon a certificate of authentication substantially in
the form set forth in Exhibit C hereto duly executed by the Trustee
shall be entitled to any right or benefit under this Indenture. No
Bond shall be valid or obligatory for any purpose unless and until
such certificate of authentication shall have been duly executed by
the Trustee, and such executed certificate of authentication of the
Trustee upon any such Bonds shall be conclusive evidence that such
Bond has been authenticated and delivered under this Indenture. The
Trustee's certificate of authentication on any Bond shall be deemed to
have been executed by it if signed with an authorized signature of the
Trustee, but it shall not be necessary that the same person sign the
certificate of authentication on all of the Bonds issued hereunder.
This Section 2.04 is subject to the provisions of Section 10.17
hereof.

     Section 2.05. Bonds Not General Obligations. Neither Pima County,
Arizona nor the State of Arizona shall in any event be liable for the
payment of the principal of or premium, if any, or interest on the
Bonds, and neither the Bonds nor the premium, if any, or the interest
thereon, shall be construed to constitute an indebtedness of Pima
County, Arizona or the State of Arizona within the meaning of any
constitutional or statutory provisions whatsoever. The Bonds and the
premium, if any, and the interest thereon shall be limited obligations
of the Authority payable solely from the Receipts and Revenues of the
Authority from the Loan Agreement and the other moneys pledged
therefor under this Indenture, and such fact shall be plainly stated
on the face of each Bond.

     Section 2.06. Prerequisites to Authentication of Bonds. The
Authority shall execute and deliver to the Trustee and the Trustee
shall authenticate the Bonds and deliver said Bonds to the initial
purchasers thereof as may be directed hereinafter in this Section
2.06.

     Prior to the delivery on original issuance by the Trustee of any
authenticated Bonds there shall be or have been delivered to the
Trustee:

          (a) a duly certified copy of a resolution of the Board of
     Directors of the Authority authorizing the execution and delivery
     of this Indenture and the Loan Agreement and the issuance of the
     Bonds;

          (b) an original duly executed counterpart or a duly
     certified copy of the Loan Agreement;

          (c) a request and authorization to the Trustee on behalf of
     the Authority, signed by its President or a Vice President, to
     authenticate and deliver the Bonds in the aggregate principal
     amount determined by this Indenture to the purchaser or
     purchasers therein identified upon payment to the Trustee, but
     for the account of the Authority, of a sum specified in such
     request and authorization plus any accrued interest on such Bonds
     to the date of delivery; and

          (d) a written statement on behalf of the Company, executed
     by the President, any Vice President or the Treasurer, (i)
     approving the issuance and delivery of the Bonds and (ii)
     consenting to each and every provision of this Indenture.

     Section 2.07. Lost or Destroyed Bonds or Bonds Canceled in Error.
If any Bond, whether in temporary or definitive form, is lost (whether
by reason of theft or otherwise), destroyed (whether by mutilation,
damage, in whole or in part, or otherwise) or canceled in error, the
Authority may execute and the Trustee may authenticate a new Bond of
like date and denomination and bearing a number not contemporaneously
outstanding; provided that (a) in the case of any mutilated Bond, such
mutilated Bond shall first be surrendered to the Trustee and (b) in
the case of any lost Bond or Bond destroyed in whole, there shall be
first furnished to the Authority, the Trustee and the Company evidence
of such loss or destruction. In every case, the applicant for a
substitute Bond shall furnish the Authority, the Trustee and the
Company such security or indemnity as may be required by any of them.
In the event any lost or destroyed Bond or a Bond canceled in error
shall have matured or is about to mature, or has been called for
redemption, instead of issuing a substitute Bond the Trustee may, in
its discretion, pay the same without surrender thereof if there shall
be first furnished to the Authority, the Trustee and the Company
evidence of such loss, destruction or cancellation, together with
indemnity, satisfactory to them. Upon the issuance of any substitute
Bond, the Authority and the Trustee may require the payment of a sum
sufficient to cover any tax or other governmental charge that may be
imposed in relation thereto. The Trustee may charge the Owner of any
such Bond with the Trustee's reasonable fees and expenses in
connection with any transaction described in this Section 2.07.

     Every substitute Bond issued pursuant to the provisions of this
Section 2.07 by virtue of the fact that any Bond is lost, destroyed or
canceled in error shall constitute an additional contractual
obligation of the Authority, whether or not the Bond so lost,
destroyed or canceled shall be at any time enforceable, and shall be
entitled to all the benefits of this Indenture equally and
proportionately with any and all other Bonds duly issued hereunder.
All Bonds shall be held and owned upon the express condition that, to
the extent permitted by law, the foregoing provisions are exclusive
with respect to the replacement or payment of lost, destroyed or
improperly canceled Bonds, notwithstanding any law or statute now
existing or hereafter enacted.

     Section 2.08. Transfer, Registration and Exchange of Bonds. The
Registrar shall maintain and keep, at its Principal Office, books for
the registration and registration of transfer of Bonds, which, at all
reasonable times, shall be open for inspection by the Authority, the
Trustee and the Company; and, upon presentation for such purpose of
any Bond entitled to registration or registration of transfer at the
Principal Office of the Registrar, the Registrar shall register or
register the transfer in such books, under such reasonable regulations
as the Registrar may prescribe. The Registrar shall make all necessary
provisions to permit the exchange or registration of transfer of Bonds
at its Principal Office.

     The transfer of any Bond shall be registered upon the
registration books of the Registrar at the written request of the
Owner thereof or his attorney duly authorized in writing, upon
surrender thereof at the Principal Office of the Registrar, together
with a written instrument of transfer satisfactory to the Registrar
duly executed by the Owner or his duly authorized attorney. Upon the
registration of transfer of any such Bond or Bonds, the Authority
shall issue in the name of the transferee, in authorized
denominations, a new Bond or Bonds in the same aggregate principal
amount as the surrendered Bond or Bonds.

     The Authority, the Trustee, the Paying Agent, any Co-Paying Agent
and the Registrar may deem and treat the Owner of any Bond as the
absolute owner of such Bond, whether such Bond shall be overdue or
not, for the purpose of receiving payment of, or on account of, the
principal of and premium, if any, and, except as provided in Section
2.02 hereof, interest on, such Bond and for all other purposes, and
neither the Authority, the Trustee, the Paying Agent, any Co-Paying
Agent nor the Registrar shall be affected by any notice to the
contrary. All such payments so made to any such Owner or upon his
order shall be valid and effective to satisfy and discharge the
liability upon such Bond to the extent of the sum or sums so paid.

     Bonds, upon surrender thereof at the Principal Office of the
Registrar may, at the option of the Owner thereof, be exchanged for an
equal aggregate principal amount of Bonds of any authorized
denomination.

     In all cases in which the privilege of exchanging Bonds or
registering the transfer of Bonds is exercised, the Authority shall
execute and the Trustee shall authenticate and deliver Bonds in
accordance with the provisions of this Indenture. For every such
exchange or registration of transfer of Bonds, whether temporary or
definitive, the Authority, the Registrar, or the Trustee may make a
charge sufficient to reimburse it for any tax or other governmental
charge required to be paid with respect to such exchange or
registration of transfer, which sum or sums shall be paid by the
person requesting such exchange or registration of transfer as a
condition precedent to the exercise of the privilege of making such
exchange or registration of transfer. The Registrar shall not be
obligated (a) to make any such exchange or registration of transfer of
Bonds during the fifteen (15) days next preceding the date on which
notice of any proposed redemption of Bonds is given or (b) to make any
exchange or registration of transfer of any Bonds called for
redemption.

     The Bonds are to be initially registered in the name of Cede &
Co., as nominee for the Depositary. Such Bonds shall not be
transferable or exchangeable, nor shall any purported transfer be
registered, except as follows:

          (a) such Bonds may be transferred in whole, and appropriate
     registration of transfer effected, if such transfer is by such
     nominee to the Depositary, or by the Depositary to another
     nominee thereof, or by any nominee of the Depositary to any other
     nominee thereof, or by the Depositary or any nominee thereof to
     any successor securities depositary or any nominee thereof; and

          (b) such Bond may be exchanged for definitive Bonds
     registered in the respective names of the beneficial holders
     thereof, and thereafter shall be transferable without
     restriction, if:

          (i) the Depositary shall have notified the Company and the
     Trustee that it is unwilling or unable to continue to act as
     securities depositary with respect to such Bonds and the Trustee
     shall not have been notified by the Company within ninety (90)
     days of the identity of a successor securities depositary with
     respect to such Bonds;

          (ii) the Company shall have delivered to the Trustee a
     written instrument to the effect that such Bonds shall be so
     exchangeable on and after a date specified therein; or

          (iii) (1) an Event of Default shall have occurred and be
     continuing, (2) the Trustee shall have given notice of such Event
     of Default pursuant to Section 10.19 hereof and (3) there shall
     have been delivered to the Authority, the Company and the Trustee
     an opinion of counsel to the effect that the interests of the
     beneficial owners of such Bonds in respect thereof will be
     materially impaired unless such owners become owners of
     definitive Bonds.

     The Bonds delivered to the Depositary may contain a legend
reflecting the foregoing restrictions on registration of transfer and
exchange.

     Section 2.09. Other Obligations. The Authority expressly reserves
the right to issue, to the extent permitted by law, but shall not be
obligated to issue, obligations under another indenture or indentures
to provide additional funds to pay the cost of construction of the
Facilities or to refund all or any principal amount of the Bonds, or
any combination thereof.

     Section 2.10 Temporary Bonds. Pending the preparation of
definitive Bonds, the Authority may execute and the Trustee shall
authenticate and deliver temporary Bonds. Temporary Bonds shall be
issuable as registered Bonds without coupons, of any authorized
denomination, and substantially in the form of the definitive Bonds
but with such omissions, insertions and variations as may be
appropriate for temporary Bonds, all as may be determined by the
Authority. Temporary Bonds may contain such reference to any
provisions of this Indenture as may be appropriate. Every temporary
Bond shall be executed by the Authority and be authenticated by the
Trustee upon the same conditions and in substantially the same manner,
and with like effect, as the definitive Bonds. As promptly as
practicable the Authority shall execute and shall furnish definitive
Bonds and thereupon temporary Bonds may be surrendered in exchange
therefor without charge at the Principal Office of the Trustee, and
the Trustee shall authenticate and deliver in exchange for such
temporary Bonds a like aggregate principal amount of definitive Bonds
of authorized denominations. Until so exchanged the temporary Bonds
shall be entitled to the same benefits under this Indenture as
definitive Bonds.

     Section 2.11. Cancellation of Bonds. All Bonds which shall have
been surrendered to the Paying Agent or any Co-Paying Agent for
payment or redemption, and all Bonds which shall have been surrendered
to the Registrar for exchange or registration of transfer, shall be
delivered to the Trustee for cancellation. All Bonds delivered to or
acquired by the Trustee for cancellation shall be canceled and
destroyed by the Trustee. The Trustee shall furnish to the Authority,
the Paying Agent, the Registrar and the Company counterparts of
certificates evidencing such cancellation and destruction and
specifying such Bonds by number.

     Section 2.12. Payment of Principal and Interest. For the payment
of interest on the Bonds, the Authority shall cause to be deposited in
the Bond Fund, on each interest payment date, solely out of the
Receipts and Revenues of the Authority from the Loan Agreement and
other moneys pledged therefor, an amount sufficient to pay the
interest to become due on such interest payment date. The obligation
of the Authority to cause any such deposit to be made hereunder shall
be reduced by the amount of moneys in the Bond Fund available on such
interest payment date for the payment of interest on the Bonds.

     For the payment of the principal of the Bonds upon maturity, the
Authority shall cause to be deposited in the Bond Fund, on the stated
or accelerated date of maturity, solely out of the Receipts and
Revenues of the Authority from the Loan Agreement and other moneys
pledged therefor, an amount sufficient to pay the principal of the
Bonds. The obligation of the Authority to cause any such deposit to be
made hereunder shall be reduced by the amount of moneys in the Bond
Fund available on the maturity date for the payment of the principal
of the Bonds.

     Section 2.13. Applicability of Book-Entry Provisions. Anything in
this Indenture to the contrary notwithstanding, (a) the provisions of
the Blanket Issuer Letter of Representations, dated February 26, 1996,
between the Authority and The Depository Trust Company relating to the
manner of and procedures for payment and redemption of Bonds and
related matters shall apply so long as such Depositary shall be the
Owner of all Outstanding Bonds and (b) the Authority, the Trustee or
the Paying Agent, as applicable, may enter into a similar agreement,
on terms satisfactory to the Company, with any subsequent Depositary
and the provisions thereof shall apply so long as such Depositary
shall be the Owner of all Outstanding Bonds.

                              ARTICLE III

                          REDEMPTION OF BONDS

     Section 3.01. Redemption Provisions. (a) The Bonds shall be
subject to redemption by the Authority, at the direction of the
Company, on any date on or after September 1, 2002 in whole at any
time or in part from time to time, at the applicable redemption price
(expressed as a percentage of principal amount) set forth below, plus
accrued interest to the redemption date:

         Redemption Period                    Redemption Price
         -----------------                    ----------------

September 1, 2002 through August 31, 2003          102%
September 1, 2003 through August 31, 2004          101%
September 1, 2004 and thereafter                   100%

     (b) The Bonds shall be subject to redemption by the Authority, at
the direction of the Company, in whole at any time at the principal
amount thereof plus accrued interest to the redemption date, if:

          (i) the Company shall have determined that the continued
     operation of the Facilities is impracticable, uneconomical or
     undesirable for any reason;

          (ii) all or substantially all of the Facilities shall have
     been condemned or taken by eminent domain; or

          (iii) the operation of the Facilities shall have been
     enjoined or shall have otherwise been prohibited by, or shall
     conflict with, any order, decree, rule or regulation of any court
     or of any federal, state or local regulatory body, administrative
     agency or other governmental body.

     (c) The Bonds shall be subject to mandatory redemption by the
Authority, at the principal amount thereof plus accrued interest to
the redemption date, on the 180th day (or such earlier date as may be
designated by the Company) after a final determination by a court of
competent jurisdiction or an administrative agency, to the effect
that, as a result of a failure by the Company to perform or observe
any covenant, agreement or representation contained in the Loan
Agreement, the interest payable on the Bonds is included for federal
income tax purposes in the gross income of the owners thereof, other
than any owner of a Bond who is a "substantial user" of the Facilities
or a "related person" within the meaning of Section 103(b)(13) of the
1954 Code. No determination by any court or administrative agency
shall be considered final for the purposes of this Section 3.01 (c)
unless the Company shall have been given timely notice of the
proceeding which resulted in such determination and an opportunity to
participate in such proceeding, either directly or through an owner of
a Bond, and until the conclusion of any appellate review sought by any
party to such proceeding or the expiration of the time for seeking
such review. The Bonds shall be redeemed either in whole or in part in
such principal amount that, in the opinion of Bond Counsel, the
interest payable on the Bonds, including the Bonds remaining
outstanding after such redemption, would not be included in the gross
income of any owner thereof, other than an owner of a Bond who is a
"substantial user" of the Facilities or a "related person" within the
meaning of Section 103(b)(13) of the 1954 Code.

     Section 3.02. Selection of Bonds to be Redeemed. If less than all
the Bonds shall be called for redemption under any provision of this
Indenture permitting such partial redemption, the particular Bonds or
portions of Bonds to be redeemed shall be selected by the Trustee, in
such manner as the Trustee in its discretion may deem proper, in the
aggregate principal amount designated to the Trustee by the Company or
otherwise as required by this Indenture; provided, however, that if,
as indicated in a certificate of an Authorized Company Representative
delivered to the Trustee, the Company shall have offered to purchase
all Bonds then Outstanding and less than all such Bonds have been
tendered to the Company for such purchase, the Trustee, at the
direction of an Authorized Company Representative, shall select for
redemption all such Bonds which shall not have been so tendered; and
provided, further, that the portion of any Bond to be redeemed shall
be in the principal amount of $5,000 or some integral multiple thereof
and that, in selecting Bonds for redemption, the Trustee shall treat
each Bond as representing that number of Bonds which is obtained by
dividing the principal amount of such Bond by $5,000. If it is
determined that one or more, but not all, of the $5,000 units of
principal amount represented by any such Bond is to be called for
redemption, then, upon notice of intention to redeem such $5,000 unit
or units, the Owner of such Bond shall forthwith surrender such Bond
to the Paying Agent or any Co-Paying Agent for (y) payment to such
Owner of the redemption price (including the redemption premium, if
any, and accrued interest to the date fixed for redemption) of the
$5,000 unit or units of principal amount called for redemption and (z)
delivery to such Owner of a new Bond or Bonds in the aggregate
principal amount of the unredeemed balance of the principal amount of
any such Bond. Bonds representing the unredeemed balance of the
principal amount of any such Bond shall be delivered to the Owner
thereof, without charge therefor. If the Owner of any such Bond of a
denomination greater than $5,000 shall fail to present such Bond to
the Paying Agent or any Co-Paying Agent for payment and exchange as
aforesaid, such Bond shall, nevertheless, become due and payable on
the date fixed for redemption to the extent of the $5,000 unit or
units of principal amount called for redemption (and to that extent
only).

     Section 3.03. Procedure for Redemption. (a) In the event any of
the Bonds are called for redemption, the Trustee shall give notice, in
the name of the Authority, of the redemption of such Bonds, which
notice shall (i) specify the Bonds to be redeemed, the redemption
date, the redemption price, and the place or places where amounts due
upon such redemption will be payable (which shall be the Principal
Office of the Paying Agent or any Co-Paying Agent) and, if less than
all of the Bonds are to be redeemed, the numbers of the Bonds to be
redeemed, and the portion of the principal amount of any Bond to be
redeemed in part, (ii) state any condition to such redemption and
(iii) state that on the redemption date, and upon the satisfaction of
any such condition, the Bonds or portions thereof to be redeemed shall
cease to bear interest. Such notice may set forth any additional
information relating to such redemption. Such notice shall be given by
Mail at least thirty (30) days prior to the date fixed for redemption
to the Owners of the Bonds to be redeemed; provided, however, that
failure duly to give such Notice by Mail, or any defect therein, shall
not affect the validity of any proceedings for the redemption of Bonds
as to which there shall have been no such failure or defect. If a
notice of redemption shall be unconditional, or if the conditions of a
conditional notice or redemption shall have been satisfied, then upon
presentation and surrender of Bonds so called for redemption at the
place or places of payment, such Bonds shall be redeemed. The Trustee
shall promptly deliver to the Company a copy of each such notice of
redemption.

     (b) With respect to any notice of redemption of Bonds in
accordance with subsection (a) or (b) of Section 3.01 hereof, unless,
upon the giving of such notice, such Bonds shall be deemed to have
been paid within the meaning of Article VIII hereof, such notice shall
state that such redemption shall be conditional upon the receipt, by
the Trustee at or prior to the opening of business on the date fixed
for such redemption, of moneys sufficient to pay the principal of and
premium, if any, and interest on such Bonds to be redeemed, and that
if such moneys shall not have been so received said notice shall be of
no force and effect and the Authority shall not be required to redeem
such Bonds. In the event that such notice of redemption contains such
a condition and such moneys are not so received, the redemption shall
not be made and the Trustee shall within a reasonable time thereafter
give notice, in the manner in which the notice of redemption was
given, that such moneys were not so received.

     (c) Any Bonds and portions of Bonds which have been duly selected
for redemption shall cease to bear interest on the specified
redemption date provided that moneys sufficient to pay the principal
of, premium, if any, and interest on such Bonds shall be on deposit
with the Trustee on the date fixed for redemption so that such Bonds
will be deemed to be paid in accordance with Article VIII hereof.

     Section 3.04. Payment of Redemption Price. For the redemption of
any of the Bonds, the Authority shall cause to be deposited in the
Bond Fund, on the redemption date, solely out of the Receipts and
Revenues of the Authority from the Loan Agreement, an amount
sufficient to pay the principal of and premium, if any, and interest
to become due on such redemption date. The obligation of the Authority
to cause any such deposit to be made hereunder shall be reduced by the
amount of moneys in the Bond Fund available on such redemption date
for payment of the principal of and premium, if any, and accrued
interest on the Bonds to be redeemed.

     Section 3.05. No Partial Redemption After Default. Anything in
this Indenture to the contrary notwithstanding, if there shall have
occurred and be continuing an Event of Default defined in clause (a)
or (b) of the first paragraph of Section 9.01 hereof, there shall be
no redemption of less than all of the Bonds at the time Outstanding
other than a partial redemption in connection with an offer by the
Company to purchase all Bonds Outstanding as contemplated in the first
proviso to the first sentence of Section 3.02 hereof.


                              ARTICLE IV

                             THE BOND FUND

     Section 4.01. Creation of Bond Fund. There is hereby created and
established with the Trustee a trust fund in the name of the Authority
to be designated "The Industrial Development Authority of The County
of Pima Industrial Development Revenue Bonds, 1997 Series B (Tucson
Electric Power Company Project) Bond Fund". The Trustee shall
establish and maintain within the Bond Fund such segregated
subaccounts as may be requested by an Authorized Company
Representative. The Bond Fund, and all moneys and certificated
securities therein, shall be kept in the possession of the Trustee.

     Section 4.02. Liens. The Authority shall not create any lien upon
the Bond Fund or upon the Receipts and Revenues of the Authority from
the Loan Agreement other than the lien hereby created.

     Section 4.03. Deposits into Bond Fund. (a) There shall be
deposited into the Bond Fund:

          (i) the accrued interest, if any, on the Bonds accrued to
     the date of delivery thereof and paid by the initial purchasers
     thereof;

          (ii) all Loan Payments; and

          (iii) all other moneys received by the Trustee under and
     pursuant to any provision of the Loan Agreement, other than
     Sections 5.03, 5.04 and 8.05 thereof, or from any other source
     when accompanied by directions by the Company that such moneys
     are to be paid into the Bond Fund.

     (b) All income or other gain from the investment of moneys in the
Bond Fund shall be deposited into the Bond Fund.

     Section 4.04. Use of Moneys in Bond Fund. Moneys, if any, paid
into the Bond Fund pursuant to clause (i) of Section 4.03(a) hereof
shall be applied to the payment of interest on the Bonds. Except as
otherwise provided in Sections 4.06, 9.01 and 10.04 hereof, all other
moneys in the Bond Fund constituting part of the Trust Estate 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 and payable at
maturity, upon redemption or otherwise.

     Section 4.05. Custody of Bond Fund; Withdrawal of Moneys. The
Bond Fund shall be in the custody of the Trustee but in the name of
the Authority and the Authority hereby authorizes and directs the
Trustee to withdraw from the Bond Fund and furnish to the Paying Agent
funds constituting part of the Trust Estate sufficient to pay the
principal of and premium, if any, and interest on the Bonds as the
same shall become due and payable, and to withdraw from the Bond Fund
funds sufficient to pay any other amounts payable therefrom as the
same shall become due and payable.

     Section 4.06. Bonds Not Presented for Payment. In the event any
Bonds shall not be presented for payment when the principal thereof
and premium, if any, thereon become due, either at maturity or at the
date fixed for redemption thereof or otherwise, if moneys sufficient
to pay such Bonds are held by the Paying Agent or any Co-Paying Agent
for the benefit of the Owners thereof, the Paying Agent shall
segregate and hold such moneys in trust, without liability for
interest thereon, for the benefit of the Owners of such Bonds, who
shall, except as provided in the following paragraph, thereafter be
restricted exclusively to such fund or funds for the satisfaction of
any claim of whatever nature on their part under this Indenture or
relating to said Bonds.

     Any moneys which the Paying Agent shall segregate and hold in
trust for the payment of the principal of and premium, if any, or
interest on any Bond and remaining unclaimed for one year after such
principal, premium, if any, or interest has become due and payable
shall, upon the Company's written request to the Paying Agent, be paid
to the Company, with notice to the Trustee of such action; provided,
however, that before the Paying Agent shall be required to make any
such repayment, the Paying Agent shall, at the expense of the Company
cause notice to be given once by Publication to the effect that such
money remains unclaimed and that, after a date specified therein,
which shall not be less than thirty (30) days from the date of such
notice by Publication, any unclaimed balance of such moneys then
remaining will be paid to the Company. After the payment of such
unclaimed moneys to the Company, the Owner of such Bond shall
thereafter look only to the Company for the payment thereof, and all
liability of the Authority, the Trustee and the Paying Agent with
respect to such moneys shall thereupon cease.

     Section 4.07. Moneys Held in Trust. All moneys and Investment
Securities held by the Trustee in the Bond Fund, and all moneys
required to be deposited with or paid to the Trustee for deposit into
the Bond Fund, and all moneys withdrawn from the Bond Fund and held by
the Trustee, the Paying Agent, any Co-Paying Agent, shall be held by
the Trustee, the Paying Agent or any Co-Paying Agent, as the case may
be, in trust, and such moneys and Investment Securities (other than
moneys held pursuant to Section 4.06 hereof and moneys or Investment
Securities held in the Rebate Fund established in furtherance of the
obligations of the Company under clause (b) of Section 6.04 of the
Loan Agreement), while so held or so required to be deposited or paid,
shall constitute part of the Trust Estate and be subject to the lien
and security interest created hereby in favor of the Trustee, for the
benefit of the Owners from time to time of the Bonds. The Company
shall have no right, title or interest in the Bond Fund, except such
rights as may arise after the right, title and interest of the Trustee
in and to the Trust Estate and all covenants, agreements and other
obligations of the Authority under this Indenture shall have ceased,
terminated and become void and shall have been satisfied and
discharged in accordance with Article VIII hereof.


                               ARTICLE V

                        DISPOSITION OF PROCEEDS

     Section 5.01. Disposition of Proceeds. The proceeds from the
issuance and sale of the Bonds shall be applied as provided in Section
4.03 of the Loan Agreement.


                              ARTICLE VI

                              INVESTMENTS

     Section 6.01. Investments. The moneys in the Bond Fund shall, at
the direction of the Company, be invested and reinvested in Investment
Securities. Any Investment Securities may be purchased subject to
options or other rights in third parties to acquire the same. Subject
to the further provisions of this Section 6.01, such investments shall
be made by the Trustee as directed and designated by the Company in a
certificate of, or telephonic advice promptly confirmed by a
certificate of, an Authorized Company Representative. As and when any
amounts thus invested may be needed for disbursements from the Bond
Fund, the Trustee shall request the Company to designate such
investments to be sold or otherwise converted into cash to the credit
of the Bond Fund as shall be sufficient to meet such disbursement
requirements and shall then follow any directions in respect thereto
of an Authorized Company Representative. As long as no Event of
Default (as defined in Section 9.01 hereof) shall have occurred and be
continuing, the Company shall have the right to designate the
investments to be sold and to otherwise direct the Trustee in the sale
or conversion to cash of the investments made with the moneys in the
Bond Fund, provided that the Trustee shall be entitled to conclusively
assume the absence of any such Event of Default unless it has notice
thereof within the meaning of Section 10.05 hereof.


                              ARTICLE VII

                           GENERAL COVENANTS

     Section 7.01. No General Obligations. Each and every covenant
herein made, including all covenants made in the various sections of
this Article VII, is predicated upon the condition that neither Pima
County, Arizona nor the State of Arizona shall in any event be liable
for the payment of the principal of, or premium, if any, or interest
on the Bonds or for the performance of any pledge, mortgage,
obligation or agreement created by or arising out of this Indenture or
the issuance of the Bonds, and further that neither the Bonds, nor the
premium, if any, or interest thereon, nor any such obligation or
agreement of the Authority shall be construed to constitute an
indebtedness of Pima County, Arizona or the State of Arizona within
the meaning of any constitutional or statutory provisions whatsoever.
The Bonds and the interest and premium, if any, thereon shall be
limited obligations of the Authority payable solely from the Receipts
and Revenues of the Authority from the Loan Agreement and the other
moneys pledged therefor.

     The Authority shall promptly cause to be paid, solely from the
sources stated herein, the principal of and premium, if any, and
interest on every Bond issued under this Indenture at the place, on
the dates and in the manner provided herein and in said Bonds
according to the true intent and meaning thereof.

     Section 7.02. Performance of Covenants of the Authority;
Representations. The Authority shall faithfully perform at all times
any and all covenants, undertakings, stipulations and provisions
contained in this Indenture, in any and every Bond executed,
authenticated and delivered hereunder, and in all proceedings
pertaining thereto. The Authority represents that it is duly
authorized under the Constitution and laws of the State of Arizona to
issue the Bonds authorized hereby, to enter into the Loan Agreement
and this Indenture, and to pledge and assign to the Trustee the Trust
Estate, and that the Bonds in the hands of the Owners thereof are and
will be valid and binding limited obligations of the Authority.

     Section 7.03. Maintenance of Rights and Powers; Compliance with
Laws. The Authority shall at all times use its best efforts to
maintain its corporate existence or assure the assumption of its
obligations under this Indenture by any public body succeeding to its
powers under the Act; and it shall at all times use its best efforts
to comply with all valid acts, rules, regulations, orders and
directions of any legislative, executive, administrative or judicial
body known to it to be applicable to the Loan Agreement and this
Indenture.

     Section 7.04. Enforcement of Obligations of the Company;
Amendments. Upon receipt of written notification from the Trustee, the
Authority shall cooperate with the Trustee in enforcing the obligation
of the Company to pay or cause to be paid all the payments and other
costs and charges payable by the Company under the Loan Agreement. The
Authority shall not enter into any agreement with the Company amending
the Loan Agreement without the prior written consent of the Trustee
and compliance with Sections 12.06 and 12.07 of this Indenture (a
revision to Exhibit A to the Loan Agreement not being deemed an
amendment for purposes of this Section).

     Section 7.05. Further Instruments. The Authority shall, upon the
reasonable request of the Trustee, from time to time execute and
deliver such further instruments and take such further action as may
be reasonable and as may be required to carry out the purposes of this
Indenture; provided, however, that no such instruments or actions
shall pledge the credit or taxing power of the State of Arizona, Pima
County, the Authority or any other political subdivision of said
State.

     Section 7.06. No Disposition of Trust Estate. Except as permitted
by this Indenture, the Authority shall not sell, lease, pledge, assign
or otherwise dispose of or encumber its interest in the Trust Estate
and will promptly pay or cause to be discharged or make adequate
provision to discharge any lien or charge on any part thereof not
permitted hereby.

     Section 7.07. Financing Statements. The Authority and the Trustee
shall cooperate with the Company in causing appropriate financing
statements, naming the Trustee as pledgee of the Receipts and Revenues
of the Authority from the Loan Agreement and of the other moneys
pledged under the Indenture for the payment of the principal of and
premium, if any, and interest on the Bonds, and as pledgee and
assignee of the balance of the Trust Estate, and the Authority shall
cooperate with the Trustee and the Company in causing appropriate
continuation statements to be duly filed and recorded in the
appropriate state and county offices as required by the provisions of
the Uniform Commercial Code or other similar law as adopted in the
State of Arizona and any other applicable jurisdiction, as from time
to time amended, in order to perfect and maintain the security
interests created by this Indenture.

     Section 7.08. Tax Covenants; Rebate Fund. (a) The Authority
covenants for the benefit of all Owners from time to time of the Bonds
that it will not directly or indirectly use or (to the extent within
its control), permit the use of, the proceeds of any of the Bonds or
any other funds of the Authority, or take or omit to take any other
action, if and to the extent that such use, or the taking or omission
to take such action, would cause any of the Bonds to be "arbitrage
bonds" within the meaning of Section 148 of the Code or otherwise
subject to federal income taxation by reason of Sections 103 and 141
through 150 of the Code or Section 103 of the 1954 Code, as
applicable, and any applicable regulations promulgated thereunder. To
that end the Authority covenants to comply with all covenants set
forth in the Tax Agreement, which is hereby incorporated herein by
reference as though fully set forth herein.

     (b) The Trustee shall establish and maintain a fund separate from
any other fund established and maintained hereunder designated "The
Industrial Development Authority of the County of Pima Industrial
Development Revenue Bonds, 1997 Series B (Tucson Electric Power
Company Project) Rebate Fund" (herein called the "Rebate Fund") in
accordance with the provisions of the Tax Agreement. Within the Rebate
Fund, the Trustee shall maintain such accounts as shall be directed by
the Company in order for the Authority and the Company to comply with
the provisions of the Tax Agreement. Subject to the transfer
provisions provided in paragraph (c) below, 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 Requirement (as defined in
the Tax Agreement), for payment to the United States of America, and
neither the Company, the Authority or the Owners shall have any rights
in or claim to such moneys. All amounts deposited into or on deposit
in the Rebate Fund shall be governed by this Section 7.08, by Section
6.04 of the Loan Agreement and by the Tax Agreement. The Trustee shall
conclusively be deemed to have complied with such provisions if it
follows the directions of the Company, including supplying all
necessary information in the manner set forth in the Tax Agreement,
and shall not be required to take any actions thereunder in the
absence of written directions from the Company.

     (c) Upon receipt of the Company's written instructions, the
Trustee shall remit part or all of the balances in the Rebate Fund to
the United States of America, as so directed. In addition, if the
Company so directs, the Trustee shall deposit moneys into or transfer
moneys out of the Rebate Fund from or into such accounts or funds as
directed by the Company's written directions. Any funds remaining in
the Rebate Fund after all of the Bonds shall have been paid and any
Rebate Requirement shall have been satisfied, or provision therefor
reasonably satisfactory to the Trustee shall have been made, shall be
withdrawn and remitted to the Company.

     (d) Notwithstanding any provision of this Indenture, the
obligation to remit the Rebate Requirement to the United States of
America and to comply with all other requirements of this Section
7.08, Section 6.04 of the Loan Agreement and the Tax Agreement shall
survive the payment of the Bonds and the satisfaction and discharge of
this Indenture.

     Section 7.09. Notices of Trustee. The Trustee shall give notice
to both the Authority and the Company whenever it is required hereby
to give notice to either and, additionally, shall furnish to the
Authority and the Company copies of any Notice by Mail or Publication
given by it pursuant to any provision hereof.


                             ARTICLE VIII

                              DEFEASANCE

     Section 8.01. Defeasance. If the Authority shall pay or cause to
be paid to the Owner of any Bond secured hereby the principal of and
premium, if any, and interest due and payable, and thereafter to
become due and payable, upon such Bond or any portion of such Bond in
the principal amount of $5,000 or any integral multiple thereof, such
Bond or portion thereof shall cease to be entitled to any lien,
benefit or security under this Indenture. If the Authority shall pay
or cause to be paid to the Owners of all the Bonds secured hereby the
principal of and premium, if any, and interest due and payable, and
thereafter to become due and payable, thereon, and shall pay or cause
to be paid all other sums payable hereunder including, without
limitation, amounts payable pursuant to Section 10.04 hereof, then,
and in that case, the right, title and interest of the Trustee in and
to the Trust Estate shall thereupon cease, terminate and become void.
In such event, the Trustee shall assign, transfer and turn over to the
Company the Trust Estate, including, without limitation, any surplus
in the Bond Fund and any balance remaining in any other fund created
under this Indenture.

     All or any portion of Outstanding Bonds or portions of Bonds in
principal amounts of $5,000 or any integral multiple thereof, shall
prior to the maturity or redemption date thereof be deemed to have
been paid within the meaning and with the effect expressed in this
Article VIII, and the entire indebtedness of the Authority with
respect thereof shall be satisfied and discharged, when

          (a) in the event said Bonds or portions thereof have been
     selected for redemption in accordance with Section 3.02 hereof,
     the Trustee shall have given, or the Company shall have given to
     the Trustee in form satisfactory to it irrevocable instructions
     to give, on a date in accordance with the provisions of Section
     3.03 hereof, notice of redemption of such Bonds or portions
     thereof,

          (b) there shall have been deposited with the Trustee either
     moneys in an amount which shall be sufficient, or Government
     Obligations which shall not contain provisions permitting the
     redemption thereof at the option of the issuer, the principal of
     and the interest on which, when due, and without regard to any
     reinvestment thereof, will provide moneys which, together with
     the moneys, if any, deposited with or held by the Trustee, shall
     be sufficient, to pay when due the principal of and premium, if
     any, and interest due and to become due on said Bonds or portions
     thereof on and prior to the redemption date or maturity date
     thereof, as the case may be, and

          (c) in the event said Bonds or portions thereof do not
     mature and are not to be redeemed within the next succeeding
     sixty (60) days, the Company shall have given the Trustee in form
     satisfactory to it irrevocable instructions to give, as soon as
     practicable in the same manner as a notice of redemption is given
     pursuant to Section 3.03 hereof, a notice to the Owners of said
     Bonds or portions thereof that the deposit required by clause (b)
     above has been made with the Trustee and that said Bonds or
     portions thereof are deemed to have been paid in accordance with
     this Article VIII and stating the maturity or redemption date
     upon which moneys are to be available for the payment of the
     principal of and premium, if any, and interest on said Bonds or
     portions thereof.

     Neither the Government Obligations nor moneys deposited with the
Trustee pursuant to this Article VIII nor principal or interest
payments on any such Government Obligations shall be withdrawn or used
for any purpose other than, and such Government Obligations, moneys
and principal or interest payments shall be held in trust for, the
payment of the principal of and premium, if any, and interest on said
Bonds or portions thereof; provided, that any cash received from such
principal or interest payments on such Government Obligations
deposited with the Trustee, if not then needed for such purposes,
shall, to the extent practicable, be invested in Government
Obligations of the type described in clause (b) of the preceding
paragraph maturing at times and in amounts sufficient to pay when due
the principal of and premium, if any, and interest to become due on
said Bonds or portions thereof on and prior to such redemption date or
maturity date thereof, as the case may be, and interest earned from
such reinvestments shall be paid over to the Company, as received by
the Trustee, free and clear of any trust, lien or pledge hereunder. If
payment of less than all the Bonds is to be provided for in the manner
and with the effect provided in this Article VIII, the Trustee shall
select such Bonds or portions of Bonds in the manner specified by
Section 3.02 hereof for selection for redemption of less than all
Bonds in the principal amount designated to the Trustee by the
Company. At or prior to the time of the deposit of any Government
Obligations with the Trustee pursuant to this Section 8.01, the
Company shall provide the Trustee with a certificate of an accountant
or an accounting firm as to the sufficiency of such Government
Obligations to pay when due the principal of and premium, if any, and
interest due and to become due as set forth in clause (b) of the
preceding paragraph.


                              ARTICLE IX

                         DEFAULTS AND REMEDIES

     Section 9.01. Events of Default. Each of the following events
shall constitute and is referred to in this Indenture as an "Event of
Default":

          (a) a failure to pay the principal of or premium, if any, on
     any of the Bonds when the same shall become due and payable at
     maturity, upon redemption or otherwise;

          (b) a failure to pay an installment of interest on any of
     the Bonds after such interest shall have become due and payable
     for a period of thirty (30) days;

          (c) a failure by the Authority to observe and perform any
     covenant, condition, agreement or provision (other than as
     specified in clauses (a) and (b) of this Section 9.01) contained
     in the Bonds or in this Indenture on the part of the Authority to
     be observed or performed, which failure shall continue for a
     period of sixty (60) days after written notice, specifying such
     failure and requesting that it be remedied, shall have been given
     to the Authority and the Company by the Trustee, which may give
     such notice in its discretion and which shall give such notice at
     the written request of Owners of not less than 33% in principal
     amount of the Bonds then Outstanding, unless the Trustee, or the
     Trustee and Owners of a principal amount of Bonds not less than
     the principal amount of Bonds the Owners of which requested that
     such notice be given, as the case may be, shall agree in writing
     to an extension of such period prior to its expiration; provided,
     however, that the Trustee, or the Trustee and the Owners of such
     principal amount of Bonds, as the case may be, shall be deemed to
     have agreed to an extension of such period if corrective action
     is initiated by the Authority, or the Company on behalf of the
     Authority, within such period and is being diligently pursued.

     Upon the occurrence and continuance of any Event of Default
described in clause (a) or (b) of the preceding paragraph, the Trustee
may, and at the written request of Owners of not less than 33% in
principal amount of Bonds then Outstanding shall, by written notice to
the Authority and the Company, declare the Bonds to be immediately due
and payable, whereupon they shall, without further action, become and
be immediately due and payable, anything in this Indenture or in the
Bonds to the contrary notwithstanding, and the Trustee shall give
notice thereof by Mail to all Owners of Outstanding Bonds.

     The provisions of the preceding paragraph, however, are subject
to the condition that if, after the principal of the Bonds shall have
been so declared to be 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, the Authority shall cause to be
deposited with the Trustee a sum sufficient to pay all matured
installments of interest upon all Bonds and the principal of any and
all Bonds which shall have become due otherwise than by reason of such
declaration (with interest upon such principal and, to the extent
permissible by law, on overdue installments of interest, at the rate
per annum borne by the Bonds) and such amounts as shall be sufficient
to cover reasonable compensation and reimbursement of expenses payable
to the Trustee and any predecessor Trustee, and all Events of Default
hereunder other than nonpayment of the principal of Bonds which shall
have become due by said declaration shall have been remedied, then, in
every such case, such Event of Default shall be deemed waived and such
declaration and its consequences rescinded and annulled, and the
Trustee shall promptly give written notice of such waiver, rescission
and annulment to the Authority and the Company, and, if notice of the
acceleration of the Bonds shall have been given to the Owners of the
Bonds, shall give notice thereof by Mail to all Owners of Outstanding
Bonds; but no such waiver, rescission and annulment shall extend to or
affect any subsequent Event of Default or impair any right or remedy
consequent thereon.

     Section 9.02. Remedies. Upon the occurrence and continuance of
any Event of Default, then and in every such case the Trustee in its
discretion may, and upon the written request of Owners of not less
than a majority in principal amount of the Bonds then Outstanding and
receipt of indemnity to its satisfaction shall, in its own name and as
the Trustee of an express trust:

          (a) by mandamus, or other suit, action or proceeding at law
     or in equity, enforce all rights of the Owners of the Bonds, and
     require the Authority or the Company to carry out any agreements
     with or for the benefit of such Owners and to perform its or
     their duties under the Act, the Loan Agreement and this
     Indenture;

          (b) bring suit upon the Bonds; or

          (c) by action or suit in equity enjoin any acts or things
     which may be unlawful or in violation of the rights of the Owners
     of the Bonds.

     Section 9.03. Restoration to Former Position. In the event that
any proceeding taken by the Trustee to enforce any right under this
Indenture shall have been discontinued or abandoned for any reason, or
shall have been determined adversely to the Trustee, then the
Authority, the Trustee and the Owners shall be restored, subject to
any determination in such proceeding, to their former positions and
rights hereunder, respectively, and all rights, remedies and powers of
the Trustee shall continue as though no such proceeding had been
taken.

     Section 9.04. Owners' Right to Direct Proceedings. Anything in
this Indenture to the contrary notwithstanding, the Owners of a
majority in principal amount of the Bonds then Outstanding hereunder
shall have the right, by an instrument in writing executed and
delivered to the Trustee, to direct the time, method and place of
conducting all remedial proceedings available to the Trustee under
this Indenture or exercising any trust or power conferred on the
Trustee by this Indenture; provided, however, that such direction
shall not be otherwise than in accordance with law and the provisions
of this Indenture and that the Trustee shall have the right (but not
the obligation) to decline to follow any such direction if the
Trustee, being advised by counsel, shall determine that the action or
proceeding so directed may not lawfully be taken, or if the Trustee in
good faith shall determine that the action or proceedings so directed
would involve the Trustee in personal liability or if the Trustee in
good faith shall so determine that the actions or forbearances
specified in or pursuant to such direction would be unduly prejudicial
to the interests of Owners not joining in the giving of said
direction, it being understood that the Trustee shall have no duty to
ascertain whether or not such actions or forbearances are unduly
prejudicial to such Owners.

     Section 9.05. Limitation on Owners' Right to Institute
Proceedings. No Owner of Bonds shall have any right to institute any
suit, action or proceeding in equity or at law for the execution of
any trust or power hereunder, or any other remedy hereunder or on said
Bonds, unless such Owner previously shall have given to the Trustee
written notice of an Event of Default as hereinabove provided and
unless the Owners of not less than a majority in principal amount of
the Bonds then Outstanding shall have made written request of the
Trustee so to do, after the right to institute said suit, action or
proceeding shall have accrued, and shall have afforded the Trustee a
reasonable opportunity to proceed to institute the same in either its
or their name, and unless there also shall have been offered to the
Trustee security and indemnity satisfactory to it against the costs,
expenses and liabilities to be incurred therein or thereby, and the
Trustee shall not have complied with such request within a reasonable
time; and such notification, request and offer of indemnity are hereby
declared in every such case, at the option of the Trustee, to be
conditions precedent to the institution of said suit, action or
proceeding; it being understood and intended that no one or more of
the Owners of the Bonds shall have any right in any manner whatever by
his or their action to affect, disturb or prejudice the security of
this Indenture, or to enforce any right hereunder or under the Bonds,
except in the manner herein provided, and that all suits, actions and
proceedings at law or in equity shall be instituted, had and
maintained in the manner herein provided and for the equal benefit of
all Owners of the Bonds.

     Section 9.06. No Impairment of Right to Enforce Payment.
Notwithstanding any other provision in this Indenture, the right of
any Owner of a Bond to receive payment of the principal of and
premium, if any, and interest on such Bond, on or after the respective
due dates expressed therein, 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 Owner.

     Section 9.07. Proceedings by Trustee without Possession of Bonds.
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 on the trial or other proceedings relative thereto, and any
such suit, action or proceeding instituted by the Trustee shall be
brought in its name for the equal and ratable benefit of the Owners of
the Bonds, subject to the provisions of this Indenture.

     Section 9.08. No Remedy Exclusive. No remedy herein conferred
upon or reserved to the Trustee or to the Owners of the Bonds is
intended to be exclusive of any other remedy or remedies, and each and
every such remedy shall be cumulative, and shall be in addition to
every other remedy given hereunder or under the Loan Agreement, now or
hereafter existing at law or in equity or by statute.

     Section 9.09. No Waiver of Remedies. No delay or omission of the
Trustee or of any Owner of a Bond 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 of any such default, or an
acquiescence therein; and every power and remedy given by this Article
IX to the Trustee and to the Owners of the Bonds, respectively, may be
exercised from time to time and as often as may be deemed expedient.

     Section 9.10. Application of Moneys. Any moneys received by the
Trustee, by any receiver or by any Owner of a Bond pursuant to any
right given or action taken under the provisions of this Article IX,
after payment of the costs and expenses of the proceedings resulting
in the collection of such moneys and of all amounts due to the Trustee
and any predecessor Trustee under Section 10.04 hereof, shall be
deposited in the Bond Fund and all moneys so deposited in the Bond
Fund during the continuance of an Event of Default (other than moneys
for the payment of Bonds which had matured or otherwise become payable
prior to such Event of Default or for the payment of interest due
prior to such Event of Default) shall be applied as follows:

          (a) Unless the principal of all the Bonds shall have become
     due and payable, all such moneys shall be applied (i) first, to
     the payment to the persons entitled thereto of all installments
     of interest then due on the Bonds, with interest on overdue
     installments, if lawful, at the rate per annum borne by the
     Bonds, in the order of maturity of the installments of such
     interest and, if the amount available shall not be sufficient to
     pay in full any particular installment of interest, then to the
     payment ratably, according to the amounts due on such
     installment, and (ii) second, to the payment to the persons
     entitled thereto of the unpaid principal of any of the Bonds
     which shall have become due (other than Bonds called for
     redemption for the payment of which money is held pursuant to the
     provisions of this Indenture), with interest on such Bonds at
     their rate from the respective dates upon which they became due
     and, if the amount available shall not be sufficient to pay in
     full Bonds due on any particular date, together with such
     interest, then to the payment ratably, according to the amount of
     principal and interest due on such date, in each case to the
     persons entitled thereto, without any discrimination or
     privilege.

          (b) If the principal of all the Bonds shall have become due
     and payable, all such moneys shall be applied to the payment of
     the principal and interest then due and unpaid upon the Bonds,
     with interest on overdue interest and principal, as aforesaid,
     without preference or priority of principal over interest or of
     interest over principal, or of any installment of interest over
     any other installment of interest, or of any Bond over any other
     Bond, ratably, according to the amounts due respectively for
     principal and interest, to the persons entitled thereto without
     any discrimination or privilege.

          (c) If the principal of all the Bonds shall have become due
     and payable, and if acceleration of the maturity of the Bonds by
     reason of such Event of Default shall thereafter have been
     rescinded and annulled under the provisions of this Article IX,
     then, subject to the provisions of clause (b) of this Section
     9.10 which shall be applicable in the event that the principal of
     all the Bonds shall later become due and payable, the moneys
     shall be applied in accordance with the provisions of clause (a)
     of this Section 9.10.

     Section 9.11. Severability of Remedies. It is the purpose and
intention of this Article IX to provide rights and remedies to the
Trustee and the Owners which may be lawfully granted under the
provisions of the Act, but should any right or remedy herein granted
be held to be unlawful, the Trustee and the Owners shall be entitled,
as above set forth, to every other right and remedy provided in this
Indenture and by law.


                               ARTICLE X

         TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

     Section 10.01. Acceptance of Trusts. The Trustee hereby accepts
and agrees to execute the trusts hereby created, but only upon the
additional terms set forth in this Article X, to all of which the
Authority agrees and the respective Owners agree by their acceptance
of delivery of any of the Bonds.

     Section 10.02. No Responsibility for Recitals. The recitals,
statements and representations contained in this Indenture or in the
Bonds, save only the Trustee's authentication upon the Bonds, are not
made by the Trustee, and the Trustee does not assume, and shall not
have, any responsibility or obligation for the correctness of any
thereof. The Trustee makes no representation as to the validity or
sufficiency of this Indenture or the Bonds.

     Section 10.03. Limitations on Liability. The Trustee may execute
any of the trusts or powers hereof and perform the duties required of
it hereunder by or through attorneys, agents, receivers, or employees,
and shall be entitled to advice of counsel concerning all matters of
trust and its duty hereunder, and the Trustee shall not be answerable
for the default or misconduct of any such attorney, agent, receiver,
or employee selected by it with reasonable care. The Trustee shall not
be answerable for the exercise of any discretion or power under this
Indenture or for anything whatsoever in connection with the trust
created hereby, except only for its own negligence or bad faith.

     Anything in this Indenture to the contrary notwithstanding, the
Trustee shall in no event be required to expend or risk its own funds
or otherwise incur personal financial liability in the performance of
any of its duties or in the exercise of any of its rights or powers,
if there shall be reasonable grounds for believing that the repayment
of such funds or adequate indemnity against such liability is not
reasonably assured to it.

     Section 10.04. Compensation, Expenses and Advances. The Trustee,
the Paying Agent and any Co-Paying Agent, and the Registrar under this
Indenture shall be entitled to reasonable compensation for their
services rendered hereunder (not limited by any provision of law
regarding the compensation of the trustee of an express trust) and to
reimbursement for their actual out-of-pocket expenses (including
counsel fees) reasonably incurred in connection therewith except as a
result of their negligence or bad faith, including, without
limitation, compensation for any services rendered, and reimbursement
for any expenses incurred, at and subsequent to the time the Bonds are
deemed to have been paid in accordance with Article VIII hereof. If
the Authority shall fail to perform any of the covenants or agreements
contained in this Indenture, other than the covenants or agreements in
respect of the payment of the principal of and premium, if any, and
interest on the Bonds, the Trustee may, in its uncontrolled discretion
and without notice to the Owners of the Bonds, at any time and from
time to time, make advances to effect performance of the same on
behalf of the Authority, but the Trustee shall be under no obligation
so to do; and any and all such advances may bear interest at a rate
per annum not exceeding the base rate then in effect for 90-day
commercial loans by the Trustee or a commercial banking affiliate of
the Trustee designated as such by the Trustee in the city in which is
located the Principal Office of the Trustee (or such affiliate, as the
case may be) to borrowers of the highest credit standing; but no such
advance shall operate to relieve the Authority from any default
hereunder. In Section 5.03 of the Loan Agreement, the Company has
agreed that it will pay to the Trustee (including any predecessor
Trustee), the Paying Agent and any Co-Paying Agent and the Registrar,
such compensation and reimbursement of expenses and advances, but the
Company may, without creating a default hereunder, contest in good
faith the reasonableness of any such services, expenses and advances.
If the Company shall have failed to make any payment to the Trustee or
any predecessor Trustee under Section 5.03 of the Loan Agreement and
such failure shall have resulted in an Event of Default under the Loan
Agreement, the Trustee, and any predecessor Trustee, shall have, in
addition to any other rights hereunder, a claim, prior to the claim of
the Owners, for the payment of its compensation and the reimbursement
of its expenses and any advances made by it, as provided in this
Section 10.04, upon the moneys and obligations in the Bond Fund;
provided, however, that neither the Trustee nor any predecessor
Trustee shall have any such claim upon moneys or obligations deposited
with or paid to the Trustee for the redemption or payment of Bonds
which are deemed to have been paid in accordance with Article VIII
hereof.

     In Section 5.04 of the Loan Agreement, the Company has agreed to
indemnify the Trustee and any predecessor Trustee to the extent
provided therein.

     Section 10.05. Notice of Events of Default. The Trustee shall not
be required to take notice, or be deemed to have notice, of any
default or Event of Default under this Indenture other than an Event
of Default under clause (a) or (b) of the first paragraph of Section
9.01 hereof, unless an officer assigned by the Trustee to administer
its corporate trust business has been specifically notified in writing
of such default or Event of Default by Owners of at least 33% in
principal amount of the Bonds then Outstanding. The Trustee may,
however, at any time, in its discretion, require of the Authority and
the Company full information and advice as to the performance of any
of the covenants, conditions and agreements contained herein.

     Section 10.06. Action by Trustee. The Trustee shall be under no
obligation to take any action in respect of any default or Event of
Default hereunder or toward the execution or enforcement of any of the
trusts hereby created, or to institute, appear in or defend any suit
or other proceeding in connection therewith, unless requested in
writing so to do by Owners of at least a majority in principal amount
of the Bonds then Outstanding, and, if in its opinion such action may
tend to involve it in expense or liability, unless furnished, from
time to time as often as it may require, with security and indemnity
satisfactory to it. The foregoing provisions are intended only for the
protection of the Trustee, and shall not affect any discretion or
power given by any provisions of this Indenture to the Trustee to take
action in respect of any default or Event of Default without such
notice or request from the Owners of the Bonds, or without such
security or indemnity.

     Section 10.07. Good Faith Reliance. The Trustee shall be
protected and shall incur no liability in acting or proceeding in good
faith upon any resolution, notice, telegram, telex, facsimile
transmission, request, consent, waiver, certificate, statement,
affidavit, voucher, bond, requisition or other paper or document which
it shall in good faith believe to be genuine and to have been passed
or signed by the proper board, body or person or to have been prepared
and furnished pursuant to any of the provisions of this Indenture or
the Loan Agreement, or upon the written opinion of any attorney,
engineer, accountant or other expert believed by the Trustee to be
qualified in relation to the subject matter, and the Trustee shall be
under no duty to make any investigation or inquiry as to any
statements contained or matters referred to in any such instrument,
but may accept and rely upon the same as conclusive evidence of the
truth and accuracy of such statements. Neither the Trustee, the Paying
Agent, any Co-Paying Agent nor the Registrar shall be bound to
recognize any person as an Owner of a Bond or to take any action at
his request unless the ownership of such Bond is proved as
contemplated in Section 11.01 hereof.

     Section 10.08. Dealings in Bonds and with the Authority and the
Company. The Trustee, the Paying Agent, any Co-Paying Agent or the
Registrar, in its individual or any other capacity, may in good faith
buy, sell, own, hold and deal in any of the Bonds issued hereunder,
and may join in any action which any Owner of a Bond may be entitled
to take with like effect as if it did not act in any capacity
hereunder. The Trustee, the Paying Agent, any Co-Paying Agent or the
Registrar, in its individual or any other capacity, either as
principal or agent, may also engage in or be interested in any
financial or other transaction with the Authority or the Company, and
may act as depositary, trustee, or agent for any committee or body of
Owners of Bonds secured hereby or other obligations of the Authority
as freely as if it did not act in any capacity hereunder.

     Section 10.09. Allowance of Interest. The Trustee may, but shall
not be obligated to, allow and credit interest upon any moneys which
it may at any time receive under any of the provisions of this
Indenture, at such rate, if any, as it customarily allows upon similar
funds of similar size and under similar conditions. All interest
allowed on any such moneys shall be credited as provided in Article IV
with respect to interest on investments.

     Section 10.10. Construction of Indenture. The Trustee may
construe any of the provisions of this Indenture insofar as the same
may appear to be ambiguous or inconsistent with any other provision
hereof, and any construction of any such provisions hereof by the
Trustee in good faith shall be binding upon the Owners of the Bonds.

     Section 10.11. Resignation of Trustee. The Trustee may resign and
be discharged of the trusts created by this Indenture by executing an
instrument in writing resigning such trust and specifying the date
when such resignation shall take effect, and filing the same with the
President of the Authority and with the Company, not less than
forty-five (45) days before the date specified in such instrument when
such resignation shall take effect, and by giving notice of such
resignation by Mail to all Owners of Bonds. Such resignation shall
take effect on the later to occur of (i) the day specified in such
instrument and notice, unless previously a successor Trustee shall
have been appointed as hereinafter provided, in which event such
resignation shall take effect immediately upon the appointment of such
successor Trustee and (ii) the appointment of a successor Trustee.

     So long as no event which is, or after notice or lapse of time,
or both, would become, an Event of Default shall have occurred and be
continuing, if the Authority shall have delivered to the Trustee (i)
an instrument appointing a successor Trustee, effective as of a date
specified therein and (ii) an instrument of acceptance of such
appointment, effective as of such date, by such successor Trustee in
accordance with Section 10.16, the Trustee shall be deemed to have
resigned as contemplated in this Section, the successor Trustee shall
be deemed to have been appointed pursuant to subsection (b) of Section
10.13 and such appointment shall be deemed to have been accepted as
contemplated in Section 10.16, all as of such date, and all other
provisions of this Article X shall be applicable to such resignation,
appointment and acceptance except to the extent inconsistent with this
paragraph. The Authority shall deliver any such instrument of
appointment at the direction of the Company.

     Section 10.12. Removal of Trustee. The Trustee may be removed at
any time by filing with the Trustee so removed, and with the Authority
and the Company, an instrument or instruments in writing, appointing a
successor, or an instrument or instruments in writing, consenting to
the appointment by the Authority (at the direction of the Company) of
a successor and accompanied by an instrument of appointment by the
Authority (at the direction of the Company) of such successor, and in
any event executed by Owners of not less than a majority in principal
amount of the Bonds then Outstanding, such filing to be made by any
Owner of a Bond or his duly authorized attorney.

     Section 10.13. Appointment of Successor Trustee. (a) In case at
any time the Trustee shall be removed, or be dissolved, or if its
property or affairs shall be taken under the control of any state or
federal court or administrative body because of insolvency or
bankruptcy, or for any other reason, then a vacancy shall forthwith
and ipso facto exist and a successor may be appointed, and in case at
any time the Trustee shall resign or be deemed to have resigned, then
a successor may be appointed, by filing with the Authority and the
Company an instrument in writing appointing such successor Trustee
executed by Owners of not less than a majority in principal amount of
Bonds then Outstanding. Copies of such instrument shall be promptly
delivered by the Authority to the predecessor Trustee, to the Trustee
so appointed and the Company.

     (b) Until a successor Trustee shall be appointed by the Owners of
the Bonds as herein authorized, the Authority, shall appoint a
successor Trustee as directed by the Company. After any appointment by
the Authority, it shall cause notice of such appointment to be given
by Mail to all Owners of Bonds. Any new Trustee so appointed by the
Authority shall immediately and without further act be superseded by a
Trustee appointed by the Owners of the Bonds in the manner above
provided.

     (c) No resignation or removal of the Trustee and no appointment
of a successor Trustee pursuant to this Article shall become effective
until the acceptance of appointment by the successor Trustee.

     Section 10.14. Qualifications of Successor Trustee. Every
successor Trustee (a) shall be a bank or trust company duly organized
under the laws of the United States or any state or territory thereof
authorized by law to perform all the duties imposed upon it by this
Indenture and (b) shall have (or the parent holding company of which
shall have) a combined capital stock, surplus and undivided profits of
at least $100,000,000 if there can be located, with reasonable effort,
such an institution willing and able to accept the trust on reasonable
and customary terms.

     Section 10.15. Judicial Appointment of Successor Trustee. In case
at any time the Trustee shall resign and no appointment of a successor
Trustee shall be made pursuant to the foregoing provisions of this
Article X prior to the date specified in the notice of resignation as
the date when such resignation is to take effect, the retiring Trustee
may forthwith apply to a court of competent jurisdiction for the
appointment of a successor Trustee. If no appointment of a successor
Trustee shall be made pursuant to the foregoing provisions of this
Article X within six months after a vacancy shall have occurred in the
office of Trustee, any Owner of a Bond may apply to any court of
competent jurisdiction to appoint a successor Trustee. Such court may
thereupon, after such notice, if any, as it may deem proper and
prescribe, appoint a successor Trustee.

     Section 10.16. Acceptance of Trusts by Successor Trustee. Any
successor Trustee appointed hereunder shall execute, acknowledge and
deliver to the Authority an instrument accepting such appointment
hereunder, and thereupon such successor Trustee, without any further
act, deed or conveyance, shall become duly vested with all the
estates, property, rights, powers, trusts, duties and obligations of
its predecessor in the trust hereunder, with like effect as if
originally named Trustee herein. Upon request of such Trustee, such
predecessor Trustee and the Authority shall execute and deliver an
instrument transferring to such successor Trustee all the estates,
property, rights, powers and trusts hereunder of such predecessor
Trustee and, subject to the provisions of Section 10.04 hereof, such
predecessor Trustee shall pay over to the successor Trustee all moneys
and other assets at the time held by it hereunder.

     Section 10.17. Successor by Merger or Consolidation. Any
corporation or association into which any Trustee hereunder may be
merged or converted or with which it may be consolidated, or any
corporation or association resulting from any merger or consolidation
to which any Trustee hereunder shall be a party or any corporation or
association succeeding to the corporate trust business of the Trustee,
shall be the successor Trustee under this Indenture, without the
execution or filing of any paper or any further act on the part of the
parties hereto, anything in this Indenture to the contrary
notwithstanding.

     If, at the time any such successor to the Trustee shall succeed
to the trusts created by this Indenture, any of the Bonds shall have
been authenticated but not delivered, such successor Trustee may adopt
the certificate of authentication of any predecessor Trustee and
deliver such Bonds so authenticated; and if at that time, any of the
Bonds shall not have been authenticated, such successor Trustee may
authenticate such Bonds either in the name of any such predecessor
hereunder or in the name of such successor; and, in all such cases,
such certificate of authentication shall have the full force which it
is anywhere in the Bonds or in this Indenture provided that the
certificate of authentication of the Trustee shall have; provided,
however, that the right to adopt the certificate of authentication of
any predecessor Trustee or to authenticate Bonds in the name of any
predecessor Trustee shall apply only to its successor or successors by
merger, conversion or consolidation.

     Section 10.18. Standard of Care. Notwithstanding any other
provisions of this Article X, the Trustee shall, during the existence
of an Event of Default of which the Trustee has actual notice,
exercise such of the rights and powers vested in it by this Indenture
and use the same degree of skill and care in their exercise as a
prudent man would use and exercise under the circumstances in the
conduct of his own affairs.

     Section 10.19. Notice to Owners of Bonds of Event of Default. If
an Event of Default occurs of which the Trustee by Section 10.05
hereof is required to take notice and deemed to have notice, or any
other Event of Default occurs of which the Trustee has been
specifically notified in accordance with Section 10.05 hereof, and any
such Event of Default shall continue for at least two days after the
Trustee acquires actual notice thereof, unless the Trustee shall have
theretofore given a notice of acceleration pursuant to Section 9.01
hereof, the Trustee shall give Notice by Mail to all Owners of
Outstanding Bonds.

     Section 10.20. Intervention in Litigation of the Authority. In
any judicial proceeding to which the Authority is a party and which in
the opinion of the Trustee and its counsel has a substantial bearing
on the interests of the Owners of Bonds, the Trustee may intervene on
behalf of the Owners of the Bonds and shall, upon receipt of indemnity
satisfactory to it, do so if requested in writing by Owners of at
least a majority in principal amount of the Bonds then Outstanding if
permitted by the court having jurisdiction in the premises.

     Section 10.21. Paying Agent; Co-Paying Agents. The Authority
shall, with the approval of the Company, appoint the Paying Agent for
the Bonds and may at any time or from time to time, with the approval
of the Company, appoint one or more Co-Paying Agents for the Bonds,
subject to the conditions set forth in Section 10.22 hereof. The
Paying Agent and each Co-Paying Agent shall designate to the Trustee
its Principal Office and signify its acceptance of the duties and
obligations imposed upon it hereunder by a written instrument of
acceptance delivered to the Authority and the Trustee in which such
Paying Agent or Co-Paying Agent will agree, particularly:

          (a) to hold all sums held by it for the payment of the
     principal of and premium, if any, or interest on Bonds in trust
     for the benefit of the Owners of the Bonds until such sums shall
     be paid to such Owners or otherwise disposed of as herein
     provided;

          (b) to keep such books and records as shall be consistent
     with prudent industry practice, to make such books and records
     available for inspection by the Authority, the Trustee and the
     Company at all reasonable times and, in the case of a Co-Paying
     Agent, to promptly furnish copies of such books and records to
     the Paying Agent; and

          (c) in the case of a Co-Paying Agent, upon the request of
     the Paying Agent, to forthwith deliver to the Paying Agent all
     sums so held in trust by such Co-Paying Agent.

     The Authority shall cooperate with the Trustee and the Company to
cause the necessary arrangements to be made and to be thereafter
continued whereby funds derived from the sources specified in Sections
4.03 and 4.04 hereof will be made available to the Paying Agent and
each Co-Paying Agent for the payment when due of the principal of,
premium, if any, and interest on the Bonds.

     Section 10.22. Qualifications of Paying Agent and Co-Paying
Agents; Resignation; Removal. The Paying Agent and any Co-Paying Agent
shall be a corporation or association duly organized under the laws of
the United States of America or any state or territory thereof, having
a combined capital stock, surplus and undivided profits of at least
$15,000,000 and authorized by law to perform all the duties imposed
upon it by this Indenture. The Paying Agent and any Co-Paying Agent
may at any time resign and be discharged of the duties and obligations
created by this Indenture by giving at least sixty (60) days' notice
to the Authority, the Company and the Trustee. The Paying Agent and
any Co-Paying Agent may be removed at any time, at the direction of
the Company, by an instrument, signed by the Authority, filed with the
Paying Agent or such Co-Paying Agent, as the case may be, and with the
Trustee.

     In the event of the resignation or removal of the Paying Agent or
any Co-Paying Agent, the Paying Agent or such Co-Paying Agent, as the
case may be, shall pay over, assign and deliver any moneys held by it
in such capacity to its successor or, if there be no successor, to the
Trustee.

     In the event that the Authority shall fail to appoint a Paying
Agent hereunder, or in the event that the Paying Agent shall resign or
be removed, or be dissolved, or if the property or affairs of the
Paying Agent shall be taken under the control of any state or federal
court or administrative body because of bankruptcy or insolvency, or
for any other reason, and the Authority shall not have appointed its
successor as Paying Agent, the Trustee shall ipso facto be deemed to
be the Paying Agent for all purposes of this Indenture until the
appointment by the Authority of the Paying Agent or successor Paying
Agent, as the case may be.

     Upon the appointment of a successor Paying Agent, the Trustee
shall give notice thereof by Mail to all Owners of Bonds.

     Section 10.23. Registrar. The Authority shall, with the approval
of the Company, appoint the Registrar for the Bonds, subject to the
conditions set forth in Section 10.24 hereof. The Registrar shall
designate to the Trustee its Principal Office and signify its
acceptance of the duties imposed upon it hereunder by a written
instrument of acceptance delivered to the Authority and the Trustee in
which such Registrar will agree, particularly, to keep such books and
records as shall be consistent with prudent industry practice and to
make such books and records available for inspection by the Authority,
the Trustee and the Company at all reasonable times.

     The Authority shall cooperate with the Trustee and the Company to
cause the necessary arrangements to be made and to be thereafter
continued whereby Bonds, executed by the Authority and authenticated
by the Trustee, shall be made available for exchange, registration and
registration of transfer at the Principal Office of the Registrar. The
Authority shall cooperate with the Trustee, the Registrar and the
Company to cause the necessary arrangements to be made and thereafter
continued whereby the Paying Agent and any Co-Paying Agent shall be
furnished such records and other information, at such times, as shall
be required to enable the Paying Agent and such Co-Paying Agent to
perform the duties and obligations imposed upon them hereunder.

     Section 10.24. Qualifications of Registrar; Resignation; Removal.
The Registrar shall be a corporation or association duly organized
under the laws of the United States of America or any state or
territory thereof, having a combined capital stock, surplus and
undivided profits of at least $15,000,000 and authorized by law to
perform all the duties imposed upon it by this Indenture. The
Registrar may at any time resign and be discharged of the duties and
obligations created by this Indenture by giving at least sixty (60)
days' notice to the Authority, the Trustee and the Company. The
Registrar may be removed at any time, at the direction of the Company,
by an instrument signed by the Authority filed with the Registrar and
the Trustee.

     In the event of the resignation or removal of the Registrar, the
Registrar shall deliver any Bonds held by it in such capacity to its
successor or, if there be no successor, to the Trustee.

     In the event that the Authority shall fail to appoint a Registrar
hereunder, or in the event that the Registrar shall resign or be
removed, or be dissolved, or if the property or affairs of the
Registrar shall be taken under the control of any state or federal
court or administrative body because of bankruptcy or insolvency, or
for any other reason, and the Authority shall not have appointed its
successor as Registrar, the Trustee shall ipso facto be deemed to be
the Registrar for all purposes of this Indenture until the appointment
by the Authority of the Registrar or successor Registrar, as the case
may be.

     Upon the appointment of a successor Registrar, the Trustee shall
give notice thereof by Mail to all Owners of Bonds.

     Section 10.25. Several Capacities. Anything herein to the
contrary notwithstanding, the same entity may serve hereunder as the
Trustee, the Paying Agent or a Co-Paying Agent and the Registrar and
in any combination of such capacities to the extent permitted by law.


                              ARTICLE XI

            EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                      PROOF OF OWNERSHIP OF BONDS

     Section 11.01. Execution of Instruments; Proof of Ownership. Any
request, direction, consent or other instrument in writing, whether or
not required or permitted by this Indenture to be signed or executed
by Owners of the Bonds, may be in any number of concurrent instruments
of similar tenor and may be signed or executed by Owners of the Bonds
or by an agent appointed by an instrument in writing. Proof of the
execution of any such instrument and of the ownership of Bonds shall
be sufficient for any purpose of this Indenture and shall be
conclusive in favor of the Trustee with regard to any action taken by
it under such instrument if made in the following manner:

          (a) The fact and date of the execution by any person of any
     such instrument may be proved by the certificate of any officer
     in any jurisdiction who, by the laws thereof, has power to take
     acknowledgments within such jurisdiction, to the effect that the
     person signing such instrument acknowledged before him the
     execution thereof, or by an affidavit of a witness to such
     execution.

          (b) The ownership or former ownership of Bonds shall be
     proved by the registration books kept under the provisions of
     Section 2.08 hereof.

     Nothing contained in this Article XI shall be construed as
limiting the Trustee to such proof, it being intended that the Trustee
may accept any other evidence of matters herein stated which it may
deem sufficient. Any request or consent of any Owner of a Bond shall
bind every future Owner of the same Bond or any Bond or Bonds issued
in lieu thereof in respect of anything done by the Trustee or the
Authority in pursuance of such request or consent.


                              ARTICLE XII

         MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

     Section 12.01. Limitations. Neither this Indenture nor the Loan
Agreement shall be modified or amended in any respect subsequent to
the original issuance of the Bonds except as provided in and in
accordance with and subject to the provisions of this Article XII and
Section 7.04 hereof.

     The Trustee may, but shall not be obligated to, enter into any
Supplemental Indenture which affects the Trustee's own rights, duties
or immunities under this Indenture or otherwise.

     Section 12.02. Supplemental Indentures without Owner Consent. The
Authority and the Trustee may, from time to time and at any time,
without the consent of or notice to the Owners of the Bonds, enter
into Supplemental Indentures as follows:

          (a) to cure any formal defect, omission, inconsistency or
     ambiguity in this Indenture, provided, however, that such cure
     shall not materially and adversely affect the interests of the
     Owners of the Bonds;

          (b) to grant to or confer or impose upon the Trustee for the
     benefit of the Owners of the Bonds any additional rights,
     remedies, powers, authority, security, liabilities or duties
     which may lawfully be granted, conferred or imposed;

          (c) to add to the covenants and agreements of, and
     limitations and restrictions upon, the Authority in this
     Indenture other covenants, agreements, limitations and
     restrictions to be observed by the Authority;

          (d) to confirm, as further assurance, any pledge under, and
     the subjection to any claim, lien or pledge created or to be
     created by, this Indenture, of the Receipts and Revenues of the
     Authority from the Loan Agreement or of any other moneys,
     securities or funds;

          (e) to authorize a different denomination or denominations
     of the Bonds and to make correlative amendments and modifications
     to this Indenture regarding exchange ability of Bonds of
     different denominations, redemptions of portions of Bonds of
     particular denominations and similar amendments and modifications
     of a technical nature;

          (f) to modify, alter, supplement or amend this Indenture in
     such manner as shall permit the qualification hereof under the
     Trust Indenture Act of 1939, as from time to time amended;

          (g) to modify, alter, supplement or amend this Indenture in
     such manner as shall be necessary, desirable or appropriate in
     order to provide for or eliminate the registration and
     registration of transfer of the Bonds through a book-entry or
     similar method, whether or not the Bonds are evidenced by
     certificates;

          (h) to modify, alter, amend or supplement this Indenture in
     any other respect which is not materially adverse to the Owners
     and which does not involve a change described in clause (i),
     (ii), (iii) or (iv) of Section 12.03(a) hereof; and

          (i) to provide any additional procedures, covenants or
     agreements necessary or desirable to maintain the tax-exempt
     status of interest on the Bonds.

     Before the Authority and the Trustee shall enter into any
Supplemental Indenture pursuant to this Section 12.02, there shall
have been delivered to the Trustee an opinion of Bond Counsel stating
that such Supplemental Indenture is authorized or permitted by this
Indenture and the Act, complies with their respective terms, will,
upon the execution and delivery thereof, be valid and binding upon the
Authority in accordance with its terms and will not, in and of itself,
adversely affect the exclusion from gross income for federal tax
purposes of the interest on the Bonds.

     Section 12.03. Supplemental Indentures with Consent of Owners.
(a) Except for any Supplemental Indenture entered into pursuant to
Section 12.02 hereof, subject to the terms and provisions contained in
this Section 12.03 and Section 12.05 and not otherwise, Owners of not
less than a majority in aggregate principal amount of the Bonds then
Outstanding which would be adversely affected thereby shall have the
right from time to time to consent to and approve the execution and
delivery by the Authority and the Trustee of any Supplemental
Indenture deemed necessary or desirable by the Authority for the
purposes of modifying, altering, amending, supplementing or
rescinding, in any particular, any of the terms or provisions
contained in this Indenture; provided, however, that, unless approved
in writing by the Owners of all the Bonds then Outstanding which would
be adversely affected thereby, nothing herein contained shall permit,
or be construed as permitting, (i) a change in the times, amounts or
currency of payment of the principal of or premium, if any, or
interest on any Outstanding Bond, a reduction in the principal amount
or redemption price of any Outstanding Bond or a change in the rate of
interest thereon, or any impairment of the right of any Owner to
institute suit for the payment of any Bond owned by it, or (ii) the
creation of a claim or lien upon, or a pledge of, the Receipts and
Revenues of the Authority from the Loan Agreement ranking prior to or
on a parity with the claim, lien or pledge created by this Indenture
(except as referred to in Section 10.04 hereof), or (iii) a preference
or priority of any Bond or Bonds over any other Bond or Bonds, or (iv)
a reduction in the aggregate principal amount of Bonds the consent of
the Owners of which is required for any such Supplemental Indenture or
which is required, under Section 12.07 hereof, for any modification,
alteration, amendment or supplement to the Loan Agreement.

     (b) If at any time the Authority shall request the Trustee to
enter into any Supplemental Indenture for any of the purposes of this
Section 12.03, the Trustee shall cause notice of the proposed
Supplemental Indenture to be given by Mail to all Owners of
Outstanding Bonds. Such notice shall briefly set forth the nature of
the proposed Supplemental Indenture and shall state that a copy
thereof is on file at the Principal Office of the Trustee for
inspection by all Owners of Bonds.

     (c) Within two years after the date of the first mailing of such
notice, the Authority and the Trustee may enter into such Supplemental
Indenture in substantially the form described in such notice only if
there shall have first been delivered to the Trustee (i) the required
consents, in writing, of Owners of Bonds and (ii) an opinion of Bond
Counsel stating that such Supplemental Indenture is authorized or
permitted by this Indenture and the Act, complies with their
respective terms and, upon the execution and delivery thereof, will be
valid and binding upon the Authority in accordance with its terms and
will not, in and of itself, adversely affect the exclusion from gross
income for federal tax purposes of the interest on the Bonds.

     (d) If Owners of not less than the percentage of Bonds required
by this Section 12.03 shall have consented to and approved the
execution and delivery thereof as herein provided, no Owner shall have
any right to object to the execution and delivery of such Supplemental
Indenture, or to object to any of the terms and provisions contained
therein or the operation thereof, or in any manner to question the
propriety of the execution and delivery thereof, or to enjoin or
restrain the Authority or the Trustee from executing and delivering
the same or from taking any action pursuant to the provisions thereof.

     Section 12.04. Effect of Supplemental Indenture. Upon the
execution and delivery of any Supplemental Indenture pursuant to the
provisions of this Article XII, this Indenture shall be, and be deemed
to be, modified, altered, amended or supplemented in accordance
therewith, and the respective rights, duties and obligations under
this Indenture of the Authority, the Trustee and Owners of all Bonds
then Outstanding shall thereafter be determined, exercised and
enforced under this Indenture subject in all respects to such
modifications, alterations, amendments and supplements.

     Section 12.05. Consent of the Company. Anything herein to the
contrary notwithstanding, any Supplemental Indenture under this
Article XII which affects any rights, powers, agreements or
obligations of the Company under the Loan Agreement, or requires a
revision of the Loan Agreement, shall not become effective unless and
until the Company shall have consented to such Supplemental Indenture.

     Section 12.06. Amendment of Loan Agreement without Consent of
Owners. Without the consent of or notice to the Owners of the Bonds,
the Authority may enter into any Supplemental Loan Agreement, and the
Trustee may consent thereto, as may be required (a) by the provisions
of the Loan Agreement and this Indenture, (b) for the purpose of
curing any formal defect, omission, inconsistency or ambiguity
therein, (c) to provide any additional procedures, covenants or
agreements necessary or desirable to maintain the tax-exempt status of
interest on the Bonds, or (d) in connection with any other change
therein which is not materially adverse to the Owners of the Bonds. A
revision of Exhibit A to the Loan Agreement pursuant to Section 3.03
thereof shall not be deemed a Supplemental Loan Agreement for purposes
of this Indenture.

     Before the Authority shall enter into, and the Trustee shall
consent to, any Supplemental Loan Agreement pursuant to this Section
12.06, there shall have been delivered to the Trustee an opinion of
Bond Counsel stating that such Supplemental Loan Agreement is
authorized or permitted by this Indenture and the Act, complies with
their respective terms, will, upon the execution and delivery thereof,
be valid and binding upon the Authority and the Company in accordance
with its terms and will not, in and of itself, adversely affect the
exclusion from gross income for federal tax purposes of interest on
the Bonds.

     Section 12.07. Amendment of Loan Agreement with Consent of
Owners. Except in the case of Supplemental Loan Agreements referred to
in Section 12.06 hereof, the Authority shall not enter into, and the
Trustee shall not consent to, any Supplemental Loan Agreement without
the written approval or consent of the Owners of not less than a
majority in aggregate principal amount of the Bonds then Outstanding
which would be adversely affected thereby, given and procured as
provided in Section 12.03 hereof; provided, however, that, unless
approved in writing by the Owners of all Bonds then Outstanding which
would be adversely affected thereby, nothing herein contained shall
permit, or be construed as permitting, a change in the obligations of
the Company under Section 5.01 of the Loan Agreement. If at any time
the Authority or the Company shall request the consent of the Trustee
to any such proposed Supplemental Loan Agreement, the Trustee shall
cause notice of such proposed Supplemental Loan Agreement to be given
in the same manner as provided by Section 12.03 hereof with respect to
Supplemental Indentures. Such notice shall briefly set forth the
nature of such proposed Supplemental Loan Agreement and shall state
that copies of the instrument embodying the same are on file at the
Principal Office of the Trustee for inspection by all Owners of the
Bonds. The Authority may enter into, and the Trustee may consent to,
any such proposed Supplemental Loan Agreement subject to the same
conditions, and with the same effect, as provided by Section 12.03
hereof with respect to Supplemental Indentures.


                             ARTICLE XIII

                             MISCELLANEOUS

     Section 13.01. Successors of the Authority. In the event of the
dissolution of the Authority, all the covenants, stipulations,
promises and agreements in this Indenture contained, by or on behalf
of, or for the benefit of, the Authority, shall bind or inure to the
benefit of the successors of the Authority from time to time and any
entity, officer, board, commission, agency or instrumentality to whom
or to which any power or duty of the Authority shall be transferred.

     Section 13.02. Parties in Interest. Except as herein otherwise
specifically provided, nothing in this Indenture expressed or implied
is intended or shall be construed to confer upon any person, firm or
corporation other than the Authority, the Company and the Trustee and
their successors and assigns and the Owners of the Bonds any right,
remedy or claim under or by reason of this Indenture, this Indenture
being intended to be for the sole and exclusive benefit of the
Authority, the Company and the Trustee and their successors and
assigns and the Owners of the Bonds.

     Section 13.03. Severability. In case any one or more of the
provisions of this Indenture or of the Loan Agreement or of the Bonds
shall, for any reason, be held to be illegal or invalid, such
illegality or invalidity shall not affect any other provisions of this
Indenture or of the Loan Agreement or of such Bonds, and this
Indenture and the Loan Agreement and such Bonds shall be construed and
enforced as if such illegal or invalid provisions had not been
contained herein or therein.

     Section 13.04. No Personal Liability of Authority Officials. No
covenant or agreement contained in the Bonds or in this Indenture
shall be deemed to be the covenant or agreement of any director,
official, officer, agent, or employee of the Authority in his
individual capacity, and neither the members of the Board of Directors
of the Authority nor any official executing the Bonds shall be liable
personally on the Bonds or be subject to any personal liability or
accountability by reason of the issuance thereof.

     Section 13.05. Bonds Owned by the Authority or the Company. In
determining whether Owners of the requisite aggregate principal amount
of the Bonds have concurred in any direction, consent or waiver under
this Indenture, Bonds which are owned by the Authority or the Company
or by any person directly or indirectly controlling or controlled by
or under direct or indirect common control with the Company (unless
the Authority, the Company or such person owns all Bonds which are
then Outstanding, determined without regard to this Section 13.05)
shall be disregarded and deemed not to be Outstanding for the purpose
of any such determination, except that, for the purpose of determining
whether the Trustee shall be protected in relying on any such
direction, consent or waiver, only Bonds which the Trustee knows are
so owned shall be so disregarded. Upon the request of the Trustee, the
Company and the Authority shall furnish to the Trustee a certificate
identifying all Bonds, if any, actually known to either of them to be
owned or held by or for the account of any of the above-described
persons, and the Trustee shall be entitled to rely on such certificate
as conclusive evidence of the facts set forth therein and that all
other Bonds are Outstanding for the purposes of such determination.
Bonds so owned which have been pledged in good faith may be regarded
as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Bonds and
that the pledgee is not the Authority or the Company or any person
directly or indirectly controlling or controlled by or under direct or
indirect common control with the Company. 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.

     Section 13.06. Counterparts. This Indenture may be executed in
any number of counterparts, each of which, when so executed and
delivered, shall be an original; but such counterparts shall together
constitute but one and the same Indenture.

     Section 13.07. Governing Law. The laws of the State of Arizona
shall govern the construction and enforcement of this Indenture and of
all Bonds, except that the laws of the State of New York shall govern
the construction and enforcement of the rights and duties of the
Trustee hereunder and the construction of Section 13.09 hereof and the
computation of any period of grace provided herein.

     Section 13.08. Notices. Except as otherwise provided in this
Indenture, all notices, certificates, requests requisitions or other
communications by the Authority, the Company, the Trustee, the Paying
Agent, any Co-Paying Agent or the Registrar pursuant to this Indenture
shall be in writing and shall be sufficiently given and shall be
deemed given when mailed by registered mail, postage prepaid,
addressed as follows: If to the Authority, c/o Russo, Cox & Russo,
P.C., 1820 East River Road, Suite 230, Tucson, Arizona 85718; if to
the Company, at 220 West Sixth Street, Tucson, Arizona 85702,
Attention: Treasurer; if to the Trustee, at 100 Wall Street, Suite
1600, New York, New York 10005, Attention: Vice President; if to the
Paying Agent, any Co-Paying Agent or the Registrar, at the address
designated in the acceptance of appointment or engagement. Any of the
foregoing may, by notice given hereunder to each of the others,
designate any further or different addresses to which subsequent
notices, certificates, requests or other communications shall be sent
hereunder.

     Section 13.09. Holidays. If the date for making any payment or
the last date for performance of any act or the exercising of any
right, as provided in this Indenture, shall be a Saturday, Sunday or a
public holiday in the city in which is located the Principal Office of
the Trustee, such payment may be made or act performed or right
exercised on the next succeeding business day, with the same force and
effect as if done on the nominal date provided in this Indenture, and
no interest shall accrue for the period after such nominal date. If
the last day of any period of grace, as provided in this Indenture,
shall be a Saturday, Sunday or a public holiday in the city in which
is located the Principal Office of the Trustee, the last day of such
period of grace shall be deemed to be the next succeeding business
day.

     Section 13.10. Statutory Notice Regarding Cancellation of
Contracts. As required by the provisions of Section 38-511, Arizona
Revised Statutes, as amended, notice is hereby given that political
subdivisions of the State of Arizona or any of their departments or
agencies may, within three (3) years of its execution, cancel any
contract, without penalty or further obligation, made by the political
subdivisions or any of their departments or agencies on or after
September 30, 1988, if any person significantly involved in
initiating, negotiating, securing, drafting or creating the contract
on behalf of the political subdivisions or any of their departments or
agencies is, at any time while the contract or any extension of the
contact is in effect, an employee or agent of any other party to the
contract in any capacity or a consultant to any other party of the
contract with respect to the subject matter of the contract.

     The Trustee covenants and agrees not to employ as an employee,
agent or, with respect to the subject matter of this Indenture, a
consultant, any person actually known by the Trustee to be
significantly involved in initiating, negotiating, securing, drafting
or creating such Indenture on behalf of the Authority within three (3)
years from the execution hereof, unless a waiver is provided by the
Authority.


<PAGE>


     IN WITNESS WHEREOF, The Industrial Development Authority of the
County of Pima has caused this Indenture to be executed by its
President and First Trust of New York, National Association has caused
this Indenture to be executed on its behalf by its Vice President, all
as of the day and year first above written.

                              THE INDUSTRIAL DEVELOPMENT AUTHORITY
                              OF THE COUNTY OF PIMA

                              By: /s/ Stanley Lehman
                                  -----------------------------------
                                  President



                              FIRST TRUST OF NEW YORK,
                              NATIONAL ASSOCIATION



                              By: /s/ P.J. Crowley
                                  -----------------------------------
                                 Vice President

<PAGE>

                                                              EXHIBIT A

                            (FORM OF BOND)

No.


                 THE INDUSTRIAL DEVELOPMENT AUTHORITY
                         OF THE COUNTY OF PIMA
                 INDUSTRIAL DEVELOPMENT REVENUE BOND,
                             1997 SERIES B
                (TUCSON ELECTRIC POWER COMPANY PROJECT)

INTEREST RATE (PER ANNUM):
MATURITY DATE:                                           DATED:
CUSIP:
REGISTERED OWNER:
PRINCIPAL AMOUNT:                                        DOLLARS


     The Industrial Development Authority of the County of Pima, an
Arizona nonprofit corporation designated by law as a political
subdivision of the State of Arizona (the "Authority"), for value
received, hereby promises to pay (but only out of the Receipts and
Revenues of the Authority from the Loan Agreement, as hereinafter
defined, and other moneys pledged therefor) to the Registered Owner
identified above or registered assigns, on the Maturity Date set forth
above, upon the presentation and surrender hereof, the Principal
Amount set forth above and to pay (but only out of the Receipts and
Revenues of the Authority from the Loan Agreement and other moneys
pledged therefor), interest on said Principal Amount until payment of
said Principal Amount has been made or duly provided for, from the
date hereof, at the Interest Rate set forth above, semi-annually on
the first days of March and September in each year, commencing March
1, 1998. Interest will be calculated on the basis of a 360- day year
of twelve 30-day months.

     The principal of and premium, if any, on this Bond are payable at
the principal office of First Trust of New York, National Association,
as Paying Agent, or at the principal office of any co-paying agent
appointed in accordance with the Indenture (as hereinafter defined),
at the option of the Registered Owner hereof. Interest on this Bond is
payable by check drawn upon the Paying Agent and mailed to the
Registered Owner of this Bond as of the close of business on the
Record Date (as defined in the Indenture) at the registered address of
such Registered Owner; notwithstanding the foregoing, upon request to
the Paying Agent by a Registered Owner of not less than $1,000,000 in
aggregate principal amount of Bonds, interest on such Bonds and, after
presentation and surrender of such Bonds, the principal thereof shall
be paid to such Registered Owner by wire transfer to the account
maintained within the continental United States specified by such
Registered Owner or, if such Registered Owner maintains an account
with the entity acting as Paying Agent, by deposit into such account.
Payment of the principal of and premium, if any, and interest on, this
Bond shall be in any coin or currency of the United States of America
as, at the respective times of payment, shall be legal tender for the
payment of public and private debts.

     This Bond is one of the duly authorized Industrial Development
Revenue Bonds, 1997 Series B (Tucson Electric Power Company Project)
(the "Bonds") of the Authority, aggregating One Hundred Fifty Million
Dollars ($150,000,000) in principal amount, issued under and pursuant
to the Constitution and laws of the State of Arizona, particularly
Title 35, Chapter 5, Arizona Revised Statutes, as amended (the "Act"),
and the Indenture of Trust, dated as of September 15, 1997 (the
"Indenture"), between the Authority and First Trust of New York,
National Association, as trustee (the "Trustee"), for the purpose of
refinancing, by payment or redemption of (a) The Authority's
Industrial Development Revenue Bonds, 1982 Series A (Tucson Electric
Power Company General Project) due June 15, 2022 and (b) The
Authority's Industrial Development Revenue Bonds, 1982 Series A
(Tucson Electric Power Company General Project) due July 1, 2022, or
provision therefor, a portion of the costs of the acquisition,
construction, improvement and equipping of certain facilities for the
furnishing of electric energy (the "Facilities"). Pursuant to the Loan
Agreement, dated as of September 15, 1997 (the "Loan Agreement"),
between the Authority and Tucson Electric Power Company, a corporation
organized and existing under the laws of the State of Arizona (the
"Company"), the proceeds of the Bonds, other than accrued interest, if
any, paid by the initial purchasers thereof, will be loaned to the
Company.

     Neither Pima County, Arizona nor the State of Arizona shall in
any event be liable for the payment of the principal of or premium, if
any, or interest on the Bonds, and neither the Bonds, nor the premium,
if any, or the interest thereon, shall be construed to constitute an
indebtedness of Pima County, Arizona or the State of Arizona within
the meaning of any constitutional or statutory provisions whatsoever.
The Bonds and the premium, if any, and the interest thereon are
limited obligations of the Authority payable solely from the Receipts
and Revenues of the Authority from the Loan Agreement and other moneys
pledged therefor under the Indenture.

     The Bonds are equally and ratably secured, to the extent provided
in the Indenture, by the pledge thereunder of the "Receipts and
Revenues of the Authority from the Loan Agreement", which term is used
herein as defined in the Indenture and which as therein defined means
all moneys paid or payable to the Trustee for the account of the
Authority by the Company in respect of the loan payments, including
all receipts of the Trustee which, under the provisions of the
Indenture, reduce the amounts of such payments. The Authority has also
pledged and assigned to the Trustee as security for the Bonds all
other rights and interests of the Authority under the Loan Agreement
(other than its rights to indemnification and its administrative
expenses and certain other rights).

     The transfer of this Bond shall be registered upon the
registration books kept at the principal office of First Trust of New
York, National Association, as Registrar, at the written request of
the Registered Owner hereof or his attorney duly authorized in
writing, upon surrender of this Bond at said office, together with a
written instrument of transfer satisfactory to the Registrar duly
executed by the Registered Owner or his duly authorized attorney.

     In the manner and with the effect provided in the Indenture, each
of the Bonds may be redeemed prior to maturity, as follows:

          (a) The Bonds shall be subject to redemption by the
     Authority, at the direction of the Company, on any date on or
     after September 1, 2002 in whole at any time or in part from time
     to time, at the applicable redemption price (expressed as a
     percentage of principal amount) set forth below, plus accrued
     interest to the redemption date:

      Redemption Period                               Redemption Price
      -----------------                               ----------------

September 1, 2002 through August 31, 2003                   102%
September 1, 2003 through August 31, 2004                   101%
September 1, 2004 and thereafter                            100%


          (b) The Bonds shall be subject to redemption by the
     Authority, at the direction of the Company, in whole at any time
     at the principal amount thereof plus accrued interest to the
     redemption date, if:

               (i) the Company shall have determined that the
          continued operation of the Facilities is impracticable,
          uneconomical or undesirable for any reason;

               (ii) all or substantially all of the Facilities shall
          have been condemned or taken by eminent domain; or

               (iii) the operation of the Facilities shall have been
          enjoined or shall have otherwise been prohibited by, or
          shall conflict with, any order, decree, rule or regulation
          of any court or of any federal, state or local regulatory
          body, administrative agency or other governmental body.

          (c) The Bonds shall be subject to mandatory redemption by
     the Authority, at the principal amount thereof plus accrued
     interest to the redemption date, on the 180th day (or such
     earlier date as may be designated by the Company) after a final
     determination by a court of competent jurisdiction or an
     administrative agency, to the effect that, as a result of a
     failure by the Company to perform or observe any covenant,
     agreement or representation contained in the Loan Agreement, the
     interest payable on the Bonds is included for federal income tax
     purposes in the gross income of the owners thereof, other than
     any owner of a Bond who is a "substantial user" of the Facilities
     or a "related person" within the meaning of Section 103(b)(13) of
     the Internal Revenue Code of 1954, as amended (the "1954 Code").
     No determination by any court or administrative agency shall be
     considered final for the purposes of this paragraph (c) unless
     the Company shall have been given timely notice of the proceeding
     which resulted in such determination and an opportunity to
     participate in such proceeding, either directly or through an
     owner of a Bond, and until the conclusion of any appellate review
     sought by any party to such proceeding or the expiration of the
     time for seeking such review. The Bonds shall be redeemed either
     in whole or in part in such principal amount that, in the opinion
     of Bond Counsel, the interest payable on the Bonds, including the
     Bonds remaining outstanding after such redemption, would not be
     included in the gross income of any owner thereof, other than an
     owner of a Bond who is a "substantial user" of the Facilities or
     a "related person" within the meaning of Section 103(b)(13) of
     the 1954 Code.

     If less than all of the Bonds at the time outstanding are to be
called for redemption, the particular Bonds or portions of Bonds to be
redeemed shall be selected by the Trustee, in such manner as the
Trustee in its discretion may deem proper, in the principal amounts
designated to the Trustee by the Company or otherwise as required by
the Indenture.

     In the event any of the Bonds are called for redemption, the
Trustee shall give notice, in the name of the Authority, of the
redemption of such Bonds. Such notice shall be given by mailing a copy
of the redemption notice by first-class mail at least thirty (30) days
prior to the date fixed for redemption to the Registered Owners of the
Bonds to be redeemed at the addresses shown on the registration books;
provided, however, that failure duly to give such notice by mailing,
or any defect therein, shall not affect the validity of any
proceedings for the redemption of the Bonds as to which there shall be
no such failure or defect.

     With respect to any notice of redemption of Bonds in accordance
with the redemption provisions lettered (a) or (b) above, unless, upon
the giving of such notice, such Bonds shall be deemed to have been
paid within the meaning of the Indenture, such notice shall state that
such redemption, shall be conditional upon the receipt, by the Trustee
on or prior to the opening of business on the date fixed for such
redemption of moneys sufficient to pay the principal of and premium,
if any, and interest on such Bonds to be redeemed, and that if such
moneys shall not have been so received said notice shall be of no
force and effect and the Authority shall not be required to redeem
such Bonds. In the event that such notice of redemption contains such
a condition and such moneys are not so received, the redemption shall
not be made and the Trustee shall within a reasonable time thereafter
give notice, in the manner in which the notice of redemption was
given, that such moneys were not so received.

     If a notice of redemption shall be unconditional, or if the
conditions of a conditional notice of redemption shall have been
satisfied, then upon presentation and surrender of Bonds so called for
redemption at the place or places of payment, such Bonds shall be
redeemed.

     Any Bonds and portions of Bonds which have been duly selected for
redemption shall cease to bear interest on the specified redemption
date provided that moneys sufficient to pay the principal of, premium,
if any, and interest on such Bonds shall be on deposit with the
Trustee on the date fixed for redemption so that such Bonds will be
deemed to be paid in accordance with the Indenture and such Bonds
shall thereafter cease to be entitled to any lien, benefit or security
under the Indenture.

     The Registered Owner 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 default
under the Indenture, or to institute, appear in or defend any suit or
other proceeding with respect thereto, except as provided in the
Indenture.

     With certain exceptions as provided therein, the Indenture and
the Loan Agreement may be modified or amended only with the consent of
the Registered Owners of a majority in aggregate principal amount of
all Bonds outstanding under the Indenture which would be adversely
affected thereby.

     Reference is hereby made to the Indenture and the Loan Agreement,
copies of which are on file with the Trustee, for the provisions,
among others, with respect to the nature and extent of the rights,
duties and obligations of the Authority, the Company, the Trustee and
the Registered Owners of the Bonds. The Registered Owner of this Bond,
by the acceptance hereof, is deemed to have agreed and consented to
the terms and provisions of the Indenture and the Loan Agreement.

     Among other things, as provided in the Indenture and subject to
certain limitations therein set forth, this Bond or any portion of the
principal amount hereof will be deemed to have been paid within the
meaning and with the effect expressed in the Indenture, and the entire
indebtedness of the Authority in respect thereof shall be satisfied
and discharged, if there has been irrevocably deposited with the
Trustee, in trust, money in an amount which will be sufficient and/or
Government Obligations (as defined in the Indenture), the principal of
and interest on which, when due, without regard to any reinvestment
thereof, will provide moneys which, together with moneys deposited
with or held by the Trustee, will be sufficient, to pay when due the
principal of and premium, if any, and interest on this Bond or such
portion of the principal amount hereof when due.

     Among other things, the Loan Agreement contains terms, provisions
and conditions relating to the consolidation or merger of the Company
with or into, and the sale, transfer or other disposition of assets
to, another Person (as defined in the Loan Agreement), to the
assumption by such other Person, in certain circumstances, of all of
the obligations of the Company under the Loan Agreement and to the
release and discharge of the Company, in certain circumstances, from
such obligations.

     The Authority, the Trustee, the Registrar, the Paying Agent and
any co-paying agent may deem and treat the person in whose name this
Bond is registered as the absolute owner hereof for all purposes,
whether or not this Bond is overdue, and neither the Authority, the
Trustee, the Paying Agent nor any co-paying agent shall be affected by
any notice to the contrary.

     It is hereby certified, recited and declared that all acts,
conditions and things required by the Constitution and laws of the
State of Arizona to exist, to have happened and to have been
performed, precedent to and in the execution and delivery of the
Indenture and the issuance of this Bond, do exist, have happened and
have been performed in regular and due form as required by law.

     No covenant or agreement contained in this Bond or the Indenture
shall be deemed to be a covenant or agreement of any official,
officer, agent or employee of the Authority in his individual
capacity, and neither the members of the Board of Directors of the
Authority, nor any official executing this Bond, shall be liable
personally on this Bond or be subject to any personal liability or
accountability by reason of the issuance or sale of this Bond.

     This Bond shall not be entitled to any right or benefit under the
Indenture, or be valid or become obligatory for any purpose, until
this Bond shall have been authenticated by the execution by the
Trustee, or its successor as Trustee, of the certificate of
authentication inscribed hereon.


<PAGE>


     IN WITNESS WHEREOF, The Industrial Development Authority of The
County of Pima has caused this Bond to be executed with the manual or
facsimile signature of its President or Vice President and a facsimile
of its official seal to be imprinted hereon and attested with the
manual or facsimile signature of its Secretary or Assistant Secretary.



                                    THE INDUSTRIAL DEVELOPMENT
                                    AUTHORITY OF THE COUNTY OF PIMA
(Seal)


                                    By.....................................
                                               President



ATTEST:


 ......................................
      Secretary




<PAGE>

                                                           EXHIBIT B


             (FORM FOR ORDINARY REGISTRATION OF TRANSFER)

               COMPLETE AND SIGN THIS FORM FOR ORDINARY
                       REGISTRATION OF TRANSFER


FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto

Please Insert Social Security Or Other Identifying Number of Assignee

 ............................................................................


 ............................................................................
Please print or typewrite name and address including postal zip code
of assignee


 ............................................................................
this bond and all rights thereunder, hereby irrevocably constituting
and appointing ________________________ attorney to register such
transfer on the registration books in the principal office of the
Registrar, with full power of substitution in the premises.

Dated:.................    ..................................................
                           NOTE: The signature on this assignment must
                           correspond with the name as written on the face of
                           this Bond in every particular, without alteration,
                           enlargement or any change whatsoever.





<PAGE>
      
                                                           EXHIBIT C


               (FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION)

                     CERTIFICATE OF AUTHENTICATION

          This is to certify that this Bond is one of the Bonds
     described in the within-mentioned Indenture.


                            FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION,
                            as Trustee
   


                            By............................................
                                      Authorized Officer



Date of Authentication:......................





                                                              Exhibit 4e 
         =================================================================




                                    LOAN AGREEMENT
                                   (1997 SERIES C)


                                       BETWEEN



                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA





                                         AND



                            TUCSON ELECTRIC POWER COMPANY




                                       --------




                           DATED AS OF SEPTEMBER 15 , 1997



                                       ________



                                     RELATING TO

                        INDUSTRIAL DEVELOPMENT REVENUE BONDS,
                                    1997 SERIES C
                       (TUCSON ELECTRIC POWER COMPANY PROJECT)


          =================================================================


          <PAGE>

                                  TABLE OF CONTENTS*

                                                                       Page
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             LOAN AGREEMENT . . . . . . . . . . . . . . . . . . . . . .   1

                                      ARTICLE I

                                     DEFINITIONS
               SECTION 1.01.  Definitions . . . . . . . . . . . . . . . . 1
               SECTION 1.02.  Incorporation of Certain Definitions by
                              Reference . . . . . . . . . . . . . . . . . 4

                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES
               SECTION 2.01.  Representations and Warranties of the
                              Authority . . . . . . . . . . . . . . . . . 4
               SECTION 2.02.  Representations and Warranties of the
                              Company . . . . . . . . . . . . . . . . . . 4

                                     ARTICLE III

                                    THE FACILITIES
               SECTION 3.01.  Facilities; Property of the Company . . . . 5
               SECTION 3.02.  Revision of Plans and Specifications  . . . 5
               SECTION 3.03.  Maintenance of Facilities; Remodeling . . . 5
               SECTION 3.04.  Insurance . . . . . . . . . . . . . . . . . 6
               SECTION 3.05.  Condemnation  . . . . . . . . . . . . . . . 6
               SECTION 3.06.  Termination of Construction . . . . . . . . 6

                                      ARTICLE IV

       ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS OF THE BONDS
               SECTION 4.01.  Issuance of the Bonds . . . . . . . . . . . 6
               SECTION 4.02.  Issuance of Other Obligations.  . . . . . . 6
               SECTION 4.03.  The Loan; Disposition of Bond Proceeds. . . 6
               SECTION 4.04.  Investment of Moneys in Funds and Accounts  6

                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS
               SECTION 5.01.  Loan Payments.  . . . . . . . . . . . . . . 6
               SECTION 5.02.  Payments Assigned; Obligation Absolute  . . 7
               SECTION 5.03.  Payment of Expenses . . . . . . . . . . . . 7
               SECTION 5.04.  Indemnification . . . . . . . . . . . . . . 7
               SECTION 5.05.  Payment of Taxes; Discharge of Liens  . . . 8

                                      ARTICLE VI

                                  SPECIAL COVENANTS
               SECTION 6.01.  Maintenance of Corporate Existence  . . . . 8
               SECTION 6.02.  Permits or Licenses . . . . . . . . . . . . 9
               SECTION 6.03.  Authority's Access to Facilities  . . . . . 9
               SECTION 6.04.  Tax-Exempt Status of Interest on Bonds. . . 9


          --------------------

          *  This table of contents is not part of the Loan Agreement, and
             is for convenience only.  The captions herein are of no legal
             effect and do not vary the meaning or legal effect of any part
             of the Loan Agreement.


          <PAGE>


               SECTION 6.05.  Use of Facilities . . . . . . . . . . . .  10
               SECTION 6.06.  Financing Statements  . . . . . . . . . .  10

                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING
               SECTION 7.01.  Conditions  . . . . . . . . . . . . . . .  10
               SECTION 7.02.  Instrument Furnished to the Authority and
                              Trustee . . . . . . . . . . . . . . . . .  12
               SECTION 7.03.  Limitation  . . . . . . . . . . . . . . .  12

                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES
               SECTION 8.01.  Events of Default . . . . . . . . . . . .  12
               SECTION 8.02.  Force Majeure . . . . . . . . . . . . . .  12
               SECTION 8.03.  Remedies  . . . . . . . . . . . . . . . .  13
               SECTION 8.04.  No Remedy Exclusive . . . . . . . . . . .  13
               SECTION 8.05.  Reimbursement of Attorneys' and Agents'
                              Fees  . . . . . . . . . . . . . . . . . .  13
               SECTION 8.06.  Waiver of Breach  . . . . . . . . . . . .  13

                                      ARTICLE IX

                                 REDEMPTION OF BONDS
               SECTION 9.01.  Redemption of Bonds . . . . . . . . . . .  14
               SECTION 9.02.  Compliance with the Indenture . . . . . .  14

                                      ARTICLE X

                                    MISCELLANEOUS
               SECTION 10.01. Term of Agreement . . . . . . . . . . . .  14
               SECTION 10.02. Notices . . . . . . . . . . . . . . . . .  14
               SECTION 10.03. Parties in Interest . . . . . . . . . . .  14
               SECTION 10.04. Amendments  . . . . . . . . . . . . . . .  15
               SECTION 10.05. Counterparts  . . . . . . . . . . . . . .  15
               SECTION 10.06. Severability  . . . . . . . . . . . . . .  15
               SECTION 10.07. Governing Law . . . . . . . . . . . . . .  15
               SECTION 10.08. Notice Regarding Cancellation of
                              Contracts.  . . . . . . . . . . . . . . .  15


          Signatures  . . . . . . . . . . . . . . . . . . . . . . . . .  18
          Exhibit A - Description of the Facilities . . . . . . . . . . A-1


          <PAGE>


                                    LOAN AGREEMENT

               THIS LOAN AGREEMENT (1997 Series C), dated as of September
          15, 1997 (this "Agreement"), between THE INDUSTRIAL DEVELOPMENT
          AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona (hereinafter called the "Authority"), and TUCSON ELECTRIC
          POWER COMPANY, a corporation organized and existing under the
          laws of the State of Arizona (hereinafter called the "Company"),

                                W I T N E S S E T H :

               WHEREAS, the Authority is authorized and empowered under
          Title 35, Chapter 5, Arizona Revised Statutes, as amended (the
          "Act"), to issue its bonds in accordance with the Act and to make
          secured or unsecured loans for the purpose of financing or
          refinancing the acquisition, construction, improvement or
          equipping of projects consisting of land, any building or other
          improvement, and all real and personal properties, including but
          not limited to machinery and equipment, whether or not now in
          existence or under construction, whether located within or
          without Pima County, which shall be suitable for, among other
          things, facilities for the furnishing of electric energy, gas or
          water, air and water pollution control facilities and sewage and
          solid waste disposal facilities, and to charge and collect
          interest on such loans and pledge the proceeds of loan agreements
          as security for the payment of the principal of and interest on
          bonds, or designated issues of bonds, issued by the Authority and
          any agreements made in connection therewith, whenever the Board
          of Directors of the Authority finds such loans to be in
          furtherance of the purposes of the Authority or in the public
          interest;

               WHEREAS, the Authority has heretofore issued and sold
          $75,000,000 aggregate principal amount of its Industrial
          Development Revenue Bonds, 1983 Series A (Tucson Electric Power
          Company General Project), all of which remain outstanding (the
          "1983 Bonds"), the proceeds of which were loaned to the Company
          to finance a portion of the costs of the acquisition,
          construction, improvement and equipping of certain facilities for
          the furnishing of electric energy described in Exhibit A hereto
          ("Facilities");

               WHEREAS, the Authority proposes to issue and sell its
          revenue bonds for the purpose of refinancing, by the payment or
          redemption of the 1983 Bonds, or provisions therefor, the portion
          of the cost of the Facilities previously financed from the
          proceeds of the 1983 Bonds;

               NOW, THEREFORE, the parties hereto, intending to be legally
          bound hereby and in consideration of the premises, DO HEREBY
          AGREE as follows:


                                      ARTICLE I

                                     DEFINITIONS

               SECTION 1.01.  Definitions.  The terms defined in this
          Article I shall for all purposes of this Agreement have the
          meanings herein specified, unless the context clearly requires
          otherwise:

          Act:

               "Act" shall mean Title 35, Chapter 5, Arizona Revised
          Statutes, and all acts supplemental thereto or amendatory
          thereof.

          Administration Expenses:

               "Administration Expenses" shall mean the reasonable expenses
          incurred by the Authority with respect to this Agreement, the
          Indenture and any transaction or event contemplated by this
          Agreement or the Indenture, including the compensation and
          reimbursement of expenses and advances payable to the Trustee, to
          the paying agent, any co-paying agent and the registrar under the
          Indenture and a pro rata share of the Authority's annual
          operating expenses in accordance with the provisions of paragraph
          XII.D. of the Authority's Procedural Pamphlet.

          Agreement:

               "Agreement" shall mean this Loan Agreement, dated as of
          September 15, 1997, between the Authority and the Company, and
          any and all modifications, alterations, amendments and
          supplements hereto.

          Authority:

               "Authority" shall mean The Industrial Development Authority
          of the County of Pima, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona incorporated for and with the approval of Pima County,
          Arizona, pursuant to the provisions of the Constitution of the
          State of Arizona and the Act, its successors and their assigns.

          Authorized Company Representative:

               "Authorized Company Representative" shall mean each person
          at the time designated to act on behalf of the Company by written
          certificate furnished to the Authority and the Trustee containing
          the specimen signature of such person and signed on behalf of the
          Company by its President, any Vice President or its Treasurer,
          together with its Secretary or any Assistant Secretary.

          Bond Counsel:

               "Bond Counsel" shall mean any firm or firms of nationally
          recognized bond counsel experienced in matters pertaining to the
          validity of, and exclusion from gross income for federal tax
          purposes of interest on bonds issued by states and political
          subdivisions, selected by the Company and acceptable to the
          Authority.

          Bond Fund:

               "Bond Fund" shall mean the fund created by Section 4.01 of
          the Indenture.

          Bonds:

               "Bond" or "Bonds" shall mean the Industrial Development
          Revenue Bonds, 1997 Series C (Tucson Electric Power Company
          Project) of the Authority.

          Code:

               "Code" shall mean the Internal Revenue Code of 1986 or any
          successor statute thereto.  Each reference to a section of the
          Code herein shall be deemed to include the United States Treasury
          Regulations proposed or in effect thereunder and applicable to
          the Bonds or the use of the proceeds thereof, unless the context
          clearly requires otherwise.  Reference to any particular Code
          section shall, in the event of a successor Code, be deemed to be
          a reference to the successor to such Code section.

          Company:

               "Company" shall mean Tucson Electric Power Company, a
          corporation organized and existing under the laws of the State of
          Arizona, its successors and their assigns, including, without
          limitation, any successor obligor under Section 6.01 or 7.01 to
          the extent of the obligations assumed thereunder.

          Completion Date:

               "Completion Date" shall be the date on which the Facilities
          are completed in their entirety and ready to be placed in service
          and operated, all as determined by the Company.

          Facilities:

               "Facilities" shall mean the real and personal properties,
          machinery and equipment currently existing, under construction
          and to be constructed which are described in Exhibit A hereto, as
          revised from time to time to reflect any changes therein,
          additions thereto, substitutions therefor and deletions therefrom
          permitted by the terms hereof, subject, however, to the
          provisions of Section 7.01 hereof.

          Indenture:

               "Indenture" shall mean the Indenture of Trust, dated as of
          September 15, 1997, between the Authority and the Trustee
          relating to the Bonds, and any and all modifications,
          alterations, amendments and supplements thereto.

          Loan Payments:

               "Loan Payments" shall mean the payments required to be made
          by the Company pursuant to Section 5.01 hereof.

          1954 Code:

               "1954 Code" shall mean the Internal Revenue Code of 1954, as
          amended.

          1983 Bonds:

               "1983 Bonds" shall mean the $75,000,000 aggregate principal
          amount of the Authority's Industrial Development Revenue Bonds,
          1983 Series A (Tucson Electric Power Company General Project).

          Outstanding:

               "Outstanding", when used in reference to the Bonds, shall
          mean, as at any particular date, the aggregate of all Bonds
          authenticated and delivered under the Indenture except:

                    (a)  those canceled by the Trustee at or prior to such
               date or delivered to or acquired by the Trustee at or prior
               to such date for cancellation;

                    (b)  those deemed to be paid in accordance with Article
               VIII of the Indenture; and

                    (c)  those in lieu of or in exchange or substitution
               for which other Bonds shall have been authenticated and
               delivered pursuant to the Indenture, unless proof
               satisfactory to the Trustee and the Company is presented
               that such Bonds are held by a bona fide holder in due
               course.

          Person:

               "Person" means (i) any corporation, limited liability
          company, partnership, joint venture, association, joint-stock
          company, business trust, or unincorporated organization, in each
          case formed or organized under the laws of the United States of
          America, any state thereof or the District of Columbia, or (ii)
          the United States of America or any state thereof, or any
          political subdivision of either thereof, or any agency, authority
          or other instrumentality of any of the foregoing.

          Tax Agreement:

               "Tax Agreement" shall mean that tax certificate and
          agreement, dated the date of the initial authentication and
          delivery of the Bonds, between the Authority and the Company,
          relating to the requirements of the Code, and any and all
          modifications, alterations, amendments and supplements thereto.

          Trustee:

               "Trustee" shall mean First Trust of New York, National
          Association, as trustee under the Indenture, its successors in
          trust and their assigns.

               SECTION 1.02.  Incorporation of Certain Definitions by
          Reference.  Each capitalized term used herein and not otherwise
          defined herein shall have the meaning set forth in the Indenture.


                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES

               SECTION 2.01.  Representations and Warranties of the
          Authority.  The Authority makes the following representations and
          warranties as the basis for the undertakings on the part of the
          Company contained herein:

                    (a)   The Authority is an Arizona nonprofit corporation
               designated by law as a political subdivision of the State of
               Arizona created and existing under the Constitution and laws
               of the State of Arizona;

                    (b)   The Authority has the power to enter into this
               Agreement and the Indenture and to perform and observe the
               agreements and covenants on its part contained herein and
               therein, including without limitation the power to issue and
               sell the Bonds as contemplated herein and in the Indenture,
               and by proper action has duly authorized the execution and
               delivery hereof and thereof; and

                    (c)  The execution and delivery of this Agreement and
               the Indenture by the Authority do not, and consummation of
               the transactions contemplated hereby and fulfillment of the
               terms hereof and thereof by the Authority will not, result
               in a breach of any of the terms or provisions of, or
               constitute a default under, any indenture, mortgage, deed of
               trust or other agreement or instrument to which the
               Authority is now a party or by which it is now bound, or, to
               the best knowledge of the Authority, any order, rule or
               regulation applicable to the Authority of any court or of
               any regulatory body or administrative agency or other
               governmental body having jurisdiction over the Authority or
               over any of its properties, or the Constitution or laws of
               the State of Arizona.

               SECTION 2.02.  Representations and Warranties of the
          Company.  The Company makes the following representations and
          warranties as the basis for the undertakings on the part of the
          Authority contained herein:

                    (a)  The Company is a corporation duly organized and
               existing in good standing under the laws of the State of
               Arizona and duly qualified as a foreign corporation in the
               State of New Mexico;

                    (b)  The Company has power to enter into this Agreement
               and to perform and observe the agreements and covenants on
               its part contained herein and by proper corporate action has
               duly authorized the execution and delivery hereof and all
               other documents hereby executed by the Company;

                    (c)  The execution and delivery of this Agreement by
               the Company do not, and consummation of transactions
               contemplated hereby and fulfillment of the terms hereof by
               the Company will not, result in a breach of any of the terms
               or provisions of, or constitute a default under, any
               indenture, mortgage, deed of trust or other agreement or
               instrument to which the Company is a party or by which it is
               now bound, or the Restated Articles of Incorporation or
               by-laws of the Company, or any order, rule or regulation
               applicable to the Company of any court or of any regulatory
               body or administrative agency or other governmental body
               having jurisdiction over the Company or over any of its
               properties, or any statute of any jurisdiction applicable to
               the Company;

                    (d)  The Arizona Corporation Commission has approved
               all matters relating to the Company's participation in the
               transactions contemplated by this Agreement which require
               said approval, and no other consent, approval, authorization
               or other order of any regulatory body or administrative
               agency or other governmental body is legally required for
               the Company's participation therein, except such as may have
               been obtained or may be required under the securities laws
               of any jurisdiction;

                    (e)  The Facilities are to be used solely for purposes
               contemplated by the Act and are located or are to be located
               within the State of Arizona and the State of New Mexico; and

                    (f)  All of the proceeds of the Bonds (exclusive of
               accrued interest, if any, paid by the initial purchasers of
               such Bonds upon delivery thereof) will be expended to
               refinance the Facilities through the payment or redemption
               of the 1983 Bonds, or provisions therefor.


                                     ARTICLE III

                                    THE FACILITIES

               SECTION 3.01.  Facilities; Property of the Company.  An
          undivided interest in the Facilities shall be the property of the
          Company and the Authority shall have no right, title or interest
          in the Facilities.

               SECTION 3.02.  Revision of Plans and Specifications.  The
          Company may consent to one or more revisions to the plans and
          specifications for the Facilities (including without limitation
          any changes therein, additions thereto, substitutions therefor
          and deletions therefrom), at any time and from time to time prior
          to the Completion Date in any respect; provided, however, that,
          if any such revision shall render inaccurate the description of
          the Facilities contained in Exhibit A hereto, the Company shall
          deliver to the Authority and the Trustee (a) a revised Exhibit A
          containing a description of the Facilities as revised, the
          accuracy of which shall have been certified by an Authorized
          Company Representative, and (b) an opinion of Bond Counsel to the
          effect that the Facilities as described in the revised Exhibit A
          are such that the expenditure of the proceeds of the Bonds
          pursuant to this Agreement will not, in and of itself, impair the
          validity of the Bonds under the Act or the exclusion from gross
          income for federal tax purposes of interest on the Bonds.  A
          revision of Exhibit A hereto pursuant to this Section 3.02 shall
          not constitute an amendment, change or modification of this
          Agreement within the meaning of Article XII of the Indenture.

               SECTION 3.03.  Maintenance of Facilities; Remodeling.  The
          Company shall at all times cause the Facilities, and every
          element and unit thereof, to be maintained, preserved and kept in
          thorough repair, working order and condition and cause all
          needful and proper repairs and renewals thereto to be made;
          provided, however, that the Company may cause the operation of
          the Facilities, or any element or unit thereof, to be
          discontinued if, in the judgment of the Company, it is no longer
          advisable to operate the same, or if the Company intends to sell
          or dispose of the same and within a reasonable time shall
          endeavor to effectuate such sale or disposition.

               After the Completion Date, the Company may, subject to the
          provisions of Section 6.05 hereof, at its own expense remodel the
          Facilities or make such substitutions, modifications and
          improvements to the Facilities from time to time as it, in its
          discretion, may deem to be desirable for its uses and purposes,
          which remodeling, substitutions, modifications and improvements
          shall be included under the terms of this Agreement as part of
          the Facilities.

               SECTION 3.04.  Insurance.  The Company shall keep the
          Facilities insured against fire and other risks to the extent
          usually insured against by companies owning and operating similar
          property, by reputable insurance companies or, at the Company's
          election, with respect to all or any element or unit of the
          Facilities, by means of an adequate insurance fund set aside and
          maintained by it out of its own earnings or in conjunction with
          other companies through an insurance fund, trust or other
          agreement or, by means of unfunded self-insurance as may be
          reasonable and customary by companies owning and operating
          similar property.  All proceeds of such insurance shall be for
          the account of the Company.

               SECTION 3.05.  Condemnation.  The Company shall be entitled
          to the entire proceeds of any condemnation award or portion
          thereof made for damages to or takings of the Facilities or other
          property of the Company.

               SECTION 3.06.  Termination of Construction.   Anything in
          this Agreement to the contrary notwithstanding, the Company shall
          have the right at any time to terminate the construction of the
          Facilities, in whole, if the Company shall have determined that
          the continued construction or operation of the Facilities, in
          whole, is impracticable, uneconomical or undesirable for any
          reason.


                                      ARTICLE IV

              ISSUANCE OF THE BONDS; THE LOANS; DISPOSITION OF PROCEEDS
                                     OF THE BONDS

               SECTION 4.01.  Issuance of the Bonds.  The Authority shall
          issue the Bonds under and in accordance with the Indenture,
          subject to the provisions of the bond purchase agreement among
          the Authority, the initial purchaser or purchasers of the Bonds
          and the Company.  The Company hereby approves the issuance of the
          Bonds and all terms and conditions thereof.

               SECTION 4.02.  Issuance of Other Obligations.  The Authority
          and the Company expressly reserve the right to enter into, to the
          extent permitted by law, but shall not be obligated to enter
          into, an agreement or agreements other than this Agreement with
          respect to the issuance by the Authority, under an indenture or
          indentures other than the Indenture, of obligations to provide
          additional funds to pay the cost of construction of the
          Facilities or obligations to refund all or any principal amount
          of the Bonds, or any combination thereof.

               SECTION 4.03.  The Loan; Disposition of Bond Proceeds.  The
          Authority and the Company shall enter into escrow arrangements
          with the trustee for the 1983 Bonds and shall cause the proceeds
          of the Bonds, other than accrued interest, if any, paid by the
          initial purchaser or purchasers thereof, to be deposited in
          escrow with such trustee to be applied to the payment of the 1983
          Bonds upon the redemption thereof.

               The Authority shall establish the Bond Fund with the Trustee
          in accordance with Section 4.01 of the Indenture.

               SECTION 4.04.  Investment of Moneys in Funds and Accounts. 
          The Company and the Authority agree that any moneys held in any
          fund or account created by the Indenture shall be invested as
          provided in the Indenture.


                                      ARTICLE V

                           LOAN PAYMENTS; OTHER OBLIGATIONS

               SECTION 5.01.  Loan Payments.  In consideration of the
          issuance of the Bonds and the disposition of the proceeds thereof
          as contemplated in Section 4.03 hereof, the Company shall pay, or
          cause to be paid, to the Trustee for the account of the Authority
          an amount equal to the aggregate principal amount of the Bonds
          from time to time Outstanding and, as interest on its obligation
          to pay such amount, an amount equal to premium, if any, and
          interest on such Bonds, such amounts to be paid in installments
          due on the dates, in the amounts and in the manner provided in
          the Indenture for the Authority to cause amounts to be deposited
          in the Bond Fund for the payment of the principal of and premium,
          if any, and interest on the Bonds whether at stated maturity,
          upon redemption or acceleration or otherwise; provided, however,
          that the obligation of the Company to make any such payment
          hereunder shall be reduced by the amount of any reduction under
          the Indenture of the amount of the corresponding payment required
          to be made by the Authority thereunder.

               SECTION 5.02.  Payments Assigned; Obligation Absolute.  It
          is understood and agreed that all Loan Payments are, by the
          Indenture, to be pledged by the Authority to the Trustee, and
          that all rights and interest of the Authority hereunder (except
          for the Authority's rights under Sections 5.03, 5.04, 6.03 and
          8.05 hereof and any rights of the Authority to receive notices,
          certificates, requests, requisitions and other communications
          hereunder) are to be pledged and assigned to the Trustee.  The
          Company assents to such pledge and assignment and agrees that the
          obligation of the Company to make the Loan Payments shall be
          absolute, irrevocable and unconditional and shall not be subject
          to cancellation, termination or abatement, or to any defense
          other than payment or to any right of set-off, counterclaim or
          recoupment arising out of any breach by the Authority or the
          Trustee or any other party under this Agreement, the Indenture or
          otherwise, or out of any obligation or liability at any time
          owing to the Company by the Authority, the Trustee or any other
          party, and, further, that the Loan Payments and the other
          payments due hereunder shall continue to be payable at the times
          and in the amounts herein and therein specified, whether or not
          the Facilities, or any portion thereof, shall have been completed
          or shall have been destroyed by fire or other casualty, or title
          thereto, or the use thereof, shall have been taken by the
          exercise of the power of eminent domain, and that there shall be
          no abatement of or diminution in any such payments by reason
          thereof, whether or not the Facilities shall be used or useful,
          whether or not any applicable laws, regulations or standards
          shall prevent or prohibit the use of the Facilities, or for any
          other reason, all of the foregoing being subject, however, to the
          provisions of Sections 6.01 and 7.01 hereof.

               SECTION 5.03.  Payment of Expenses.  The Company shall pay
          all Administration Expenses, including, without limitation,
          Administration Expenses incurred at and subsequent to the time
          the Bonds are deemed to have been paid in accordance with Article
          VIII of the Indenture.  The payment of the compensation and the
          reimbursement of expenses and advances of the Trustee, of the
          paying agent, any co-paying agent and the registrar under the
          Indenture shall be made directly to such entities.

               SECTION 5.04.  Indemnification.  The Company releases the
          Authority, the Trustee and their directors, officers, employees
          and agents from, agrees that the Authority and the Trustee shall
          not be liable for, and agrees to indemnify and hold the
          Authority, the Trustee and their directors, officers, employees
          and agents free and harmless from, any liability (including,
          without limitation, attorneys' and other agents' fees and
          expenses) for any loss or damage to property or any injury to or
          death of any person that may be occasioned by any cause
          whatsoever pertaining to the Facilities, except (i) in the case
          of the Trustee, as a result of the negligence or bad faith or
          willful misconduct of the Trustee or its directors, officers,
          employees and agents; and (ii) in the case of the Authority, as a
          result of gross negligence or bad faith of the Authority or its
          directors, officers, employees and agents.

               The Company will indemnify and hold the Authority and the
          Trustee, free and harmless from any loss, claim, damage, tax,
          penalty, liability, disbursement, litigation expenses, attorneys'
          and other agents' fees and expenses or court costs arising out
          of, or in any way relating to, the execution or performance of
          this Agreement, the issuance or sale of the Bonds, actions taken
          under the Indenture or any other cause whatsoever pertaining to
          the Facilities, except (i) in the case the Trustee, as a result
          of the negligence or bad faith or willful misconduct of the
          Trustee; and (ii) in the case of the Authority, as a result of
          the gross negligence or bad faith of the Authority.

               The Company will indemnify and hold the Authority and its
          directors, officers, employees and agents free and harmless from
          any loss, claim, damage, tax, penalty, liability, disbursement,
          litigation expenses, attorney's fees and expenses or court costs
          arising out of or in any way relating to 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 material utilized in connection with the sale of any
          Bonds.

               SECTION 5.05.  Payment of Taxes; Discharge of Liens.  The
          Company shall: (a) pay, or make provision for payment of, all
          lawful taxes and assessments, including income, profits, property
          or excise taxes, if any, or other municipal or governmental
          charges, levied or assessed by any federal, state or municipal
          government or political body upon the Facilities or any part
          thereof or upon the Authority with respect to the Loan Payments,
          when the same shall become due; and (b) pay or cause to be
          satisfied and discharged or make adequate provision to satisfy
          and discharge, within sixty (60) days after the same shall
          accrue, any lien or charge upon the Loan Payments, and all lawful
          claims or demands for labor, materials, supplies or other charges
          which, if unpaid, might be or become a lien upon such amounts;
          provided, that, if the Company shall first notify the Authority
          and the Trustee of its intention so to do, the Company may in
          good faith contest any such lien or charge or claims or demands
          in appropriate legal proceedings, and in such event may permit
          the items so contested and identified as such by the Company to
          remain undischarged and unsatisfied during the period of such
          contest and any appeal therefrom, unless the Trustee shall notify
          the Company in writing that, in the opinion of counsel to the
          Trustee, based upon material facts disclosed to the Trustee
          without any duty of investigation, by nonpayment of any such
          items the lien of the Indenture as to the Loan Payments will be
          materially endangered, in which event the Company shall promptly
          pay and cause to be satisfied and discharged all such unpaid
          items.  The Authority shall cooperate fully with the Company in
          any such contest.


                                      ARTICLE VI

                                  SPECIAL COVENANTS

               SECTION 6.01.  Maintenance of Corporate Existence.  Except
          as permitted in this Section 6.01, the Company shall maintain its
          corporate existence, shall not sell, transfer or otherwise
          dispose of all of its assets, as or substantially as an entirety,
          and shall not consolidate with or merge with or into another
          corporation.  The Company may consolidate with or merge into
          another corporation incorporated under the laws of the United
          States of America, any state thereof or the District of Columbia,
          or sell, transfer or otherwise dispose of all of its assets, as
          or substantially as an entirety, to any Person, if the surviving
          or resulting corporation (if other than the Company) or the
          transferee Person, as the case may be, prior to or simultaneously
          with such merger, consolidation, sale, transfer or disposition,
          assumes, by delivery to the Trustee and the Authority of an
          instrument in writing satisfactory in form to the Trustee, all
          the obligations of the Company under this Agreement, including,
          without limitation, the obligations of the Company under Section
          5.01 hereof.  Upon such an assumption following any such sale,
          transfer or other disposition of assets, the Company shall be
          released and discharged from all liability in respect of all
          obligations under this Agreement.  Notwithstanding the foregoing,
          in the case of any such sale, transfer or other disposition of
          assets, which do not include the Facilities, the Company shall
          remain liable in respect of all obligations under this Agreement
          other than the obligations under Section 5.01 hereof, and the
          transferee shall not be required to assume any obligations
          hereunder other than the obligations under Section 5.01 hereof;
          provided, however, that the transferee shall be required to
          assume all such other obligations unless the Company shall have
          delivered to the Authority and the Trustee an opinion of Bond
          Counsel to the effect that the non-assumption by the transferee
          of such other obligations will not impair the validity under the
          Act of the Bonds and will not adversely affect the exclusion from
          gross income for federal tax purposes of interest on the Bonds.

               If consolidation, merger or sale, transfer or other
          disposition is made as permitted by this Section 6.01, the
          provisions of this Section 6.01 shall continue in full force and
          effect and no further consolidation, merger or sale or other
          transfer shall be made except in compliance with the provisions
          of this Section 6.01.

               Anything in this Agreement to the contrary notwithstanding,
          the sale, transfer or other disposition by the Company of all of
          its facilities (a) for the generation of electric energy, (b) for
          the transmission of electric energy or (c) for the distribution
          of electric energy, in each case considered alone, or all of its
          facilities described in clauses (a) and (b), considered together,
          or all of its facilities described in clauses (b) and (c),
          considered together, shall in no event be deemed to constitute a
          sale, transfer or other disposition of all the properties of the
          Company, as or substantially as an entirety, unless, immediately
          following such sale, transfer or other disposition, the Company
          shall own no properties in the other such categories of property
          not so sold, transferred or otherwise disposed of.  The character
          of particular facilities shall be determined by reference to the
          Uniform System of Accounts prescribed for public utilities and
          licensees subject to the Federal Power Act, as amended, to the
          extent applicable.

               SECTION 6.02.  Permits or Licenses.  In the event that it
          may be necessary for the proper performance of this Agreement on
          the part of the Company or the Authority that any application or
          applications for any permit or license to do or to perform
          certain things be made to any governmental or other agency by the
          Company or the Authority, the Company and the Authority each
          shall, upon the request of either, execute such application or
          applications.

               SECTION 6.03.  Authority's Access to Facilities.  The
          Authority shall have the right, upon appropriate prior notice to
          the Company, to have reasonable access to the Facilities during
          normal business hours for the purpose of making examinations and
          inspections of the same.

               SECTION 6.04.  Tax-Exempt Status of Interest on Bonds.
          (a)  It is the intention of the parties hereto that interest on
          the Bonds shall be and remain tax-exempt, and to that end the
          covenants and agreements of the Authority and the Company in this
          Section 6.04 and the Tax Agreement are for the benefit of the
          Owners from time to time of the Bonds.

                    (b)  Each of the Company and the Authority covenants
               and agrees for the benefit of the Owners from time to time
               of the Bonds that it will not directly or indirectly use or
               permit the use of (to the extent within its control) the
               proceeds of any of the Bonds or any other funds, or take or
               omit to take any action, if and to the extent such use, or
               the taking or omission to take such action, would cause any
               of the Bonds to be "arbitrage bonds" within the meaning of
               Section 148 of the Code or otherwise subject to federal
               income taxation by reason of Section 103 and 141 through 150
               of the Code or Section 103 of the 1954 Code and Title XIII
               of the Tax Reform Act of 1986, as applicable, and any
               applicable regulations promulgated thereunder.  To such
               ends, the Authority and the Company will comply with all
               requirements of such Section 148 to the extent applicable to
               the Bonds.  In the event that at any time the Authority or
               the Company is of the opinion that for purposes of this
               Section 6.04(b) it is necessary to restrict or limit the
               yield on the investment of any moneys held by the Trustee
               under the Indenture, the Authority or the Company shall so
               notify the Trustee in writing.

                    Without limiting the generality of the foregoing, the
               Company and the Authority agree that there shall be paid
               from time to time all amounts required to be rebated to the
               United States of America pursuant to Section 148(f) of the
               Code and any applicable Treasury Regulations.  This covenant
               shall survive payment in full or defeasance of the Bonds and
               the satisfaction and discharge of the Indenture.  The
               Company specifically covenants to pay or cause to be paid
               the Rebate Requirement as defined and described in the Tax
               Agreement.

                    (c)  The Authority certifies and represents that it has
               not taken, and the Authority covenants and agrees that it
               will not take, any action which results in interest paid on
               the Bonds being included in gross income of the Owners of
               the Bonds for federal tax purposes pursuant to Sections 103
               and 141 of the Code or to Section 103 of the 1954 Code and
               Title XIII of the Tax Reform Act of 1986, as applicable, and
               any regulations thereunder; and the Company certifies and
               represents that it has not taken or (to the extent within
               its control) permitted to be taken, and the Company
               covenants and agrees that it will not take or (to the extent
               within its control) 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,
               however, that neither the Company nor the Authority shall be
               deemed to have violated these covenants 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 103(b)(13) of
               the 1954 Code and provided, further, that none of the
               covenants and agreements herein contained shall require
               either the Company or the Authority 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 7.08 of
               the Indenture and agrees to perform all duties imposed on it
               by such Section 7.08, by this Section and by the Tax
               Agreement.  Insofar as Section 7.08 of the Indenture and the
               Tax Agreement impose duties and responsibilities on the
               Company, they are specifically incorporated herein by
               reference.

                    (d)  Notwithstanding any provision of this Section 6.04
               and Section 7.08 of the Indenture, if the Company shall
               provide to the Authority and the Trustee an opinion of Bond
               Counsel to the effect that any specified action required
               under this Section 6.04 and Section 7.08 of the Indenture is
               no longer required or that some further or different action
               is required to maintain the tax-exempt status of interest on
               the Bonds, the Company, the Trustee and the Authority may
               conclusively rely upon such opinion in complying with the
               requirements of this Section 6.04, and the covenants
               hereunder shall be deemed to be modified to that extent.

               SECTION 6.05.  Use of Facilities.  So long as any Bonds are
          Outstanding and the Facilities are operated by or for the benefit
          of the Company, the Company shall cause the Facilities to be used
          for purposes contemplated by the Act and in the Tax Agreement.

               SECTION 6.06.  Financing Statements.  The Company shall file
          and record, or cause to be filed and recorded, all financing
          statements and continuation statements referred to in Section
          7.07 of the Indenture.


                                     ARTICLE VII

                           ASSIGNMENT, LEASING AND SELLING

               SECTION 7.01.  Conditions.  The Company's interest in this
          Agreement may be assigned as a whole or in part, and its interest
          in the Facilities may be leased, sold, transferred or otherwise
          disposed of by the Company as a whole or in part (whether an
          interest in a specific element or unit or an undivided interest),
          to any Person; provided, however, that no such assignment, lease,
          sale, transfer or other disposition (a) shall relieve the Company
          from its primary liability for its obligations under Section 5.01
          hereof or (b) shall be made unless the assignee, lessee,
          purchaser or other transferee, as the case may be, prior to or
          simultaneously with such assignment, lease, sale, transfer or
          other disposition, assumes, by delivery of an instrument in
          writing satisfactory in form to the Trustee and the Authority,
          all other obligations of the Company hereunder to the extent of
          the interest assigned, leased, sold, transferred or otherwise
          disposed of, and the Company shall be released of and discharged
          from such obligations to the extent so assumed.  Notwithstanding
          the foregoing, (a) if (i) the Company's interest in this
          Agreement shall be assigned as a whole or in undivided part, (ii)
          the Company's interest in the Facilities shall be leased as a
          whole or in undivided part and the term of such leasehold or the
          term of any extension or extensions thereof at the option of the
          Company shall extend beyond the maturity date of the Bonds or
          (iii) the Company's interest in the Facilities shall be sold,
          transferred or otherwise disposed of as a whole or in undivided
          part, and (b) in the event that the assignee, lessee, purchaser
          or other transferee shall assume the obligations of the Company
          under Section 5.01 hereof for the remaining term of this
          Agreement, to the extent of such assignment, lease, sale,
          transfer or other disposition, the Company shall be released from
          and discharged of all liability in respect of such obligations to
          the extent so assumed (but only to such extent); provided,
          however, that the release and discharge of the Company pursuant
          to clause (b) shall be conditioned upon the delivery by the
          Company to the Authority and the Trustee of a certificate of an
          Independent Expert (as hereinafter defined) describing the
          interests so assigned, leased, sold, transferred or otherwise
          disposed of, together with all other rights, interests, assets
          and/or properties assigned, leased, sold, transferred or
          otherwise disposed of by the Company to the same Person in the
          same or a related transaction, stating that such rights,
          interests, assets and/or properties so described constitute
          facilities for the generation, transmission  and/or distribution
          of electric energy and stating that, in the opinion of such
          Independent Expert, the Fair Value (as hereinafter defined) of
          such rights, interests, assets and/or properties to the Person
          acquiring the same is not less than an amount equal to 10/7 of
          the sum of (x) the aggregate principal amount of the Bonds then
          Outstanding and (y) the outstanding principal amount of all other
          obligations of the Company representing indebtedness for borrowed
          money or for the deferred purchase price of property which are
          being assumed by such Person; provided, further, that after any
          such assumption, release and discharge as aforesaid, the Company
          may again assume such obligations under Section 5.01 hereof, in
          whole or in part, at any time and from time to time, and, to the
          extent of any such assumption by the Company (but only to such
          extent), the aforesaid assignee, lessee, purchaser or other
          transferee shall be released from and discharged of all liability
          in respect of such obligations.

               Anything herein to the contrary notwithstanding, the Company
          shall not make any assignment, lease or sale as provided in the
          immediately preceding paragraph unless it shall have furnished to
          the Authority and the Trustee an opinion of Bond Counsel to the
          effect that the proposed assignment, lease or sale will not
          impair the validity under the Act of the Bonds and will not
          adversely affect the exclusion of interest on the Bonds from
          gross income for federal tax purposes.

               After any lease, sale, transfer or other disposition of any
          element or unit of the Facilities, or any interest therein, the
          Company may, at its option, cause such element or unit, or
          interest therein, to no longer be deemed to be part of the
          Facilities for the purposes of this Agreement by delivering to
          the Authority and the Trustee the agreements or other documents
          required pursuant to Section 7.02 hereof together with an
          instrument signed by an Authorized Company Representative stating
          that such element or unit, or interest therein, shall no longer
          be deemed to be part of the Facilities for the purposes of this
          Agreement.

               For purposes of this Section 7.01:

                    (a)  "Independent Expert" means a Person which (i) is
               an engineer, appraiser or other expert and which, with
               respect to any certificate to be delivered pursuant to this
               Section, is qualified to pass upon the matter set forth in
               such certificate and (ii)(A) is in fact independent, (B)
               does not have any direct material financial interest in the
               transferee or in any obligor upon the Bonds or under this
               Agreement or in any affiliate of the transferee or any such
               obligor, (C) is not connected with the transferee or any
               such obligor as an officer, employee, promoter, underwriter,
               trustee, partner, director or any person performing similar
               functions and (D) is approved by the Trustee in the exercise
               of reasonable care; for purposes of this definition
               "engineer" means a Person engaged in the engineering
               profession or otherwise qualified to pass upon engineering
               matters (including, but not limited to, a Person licensed as
               a professional engineer, whether or not then engaged in the
               engineering profession); and for purposes of this definition
               "appraiser" means a Person engaged in the business of
               appraising property or otherwise qualified to pass upon the
               Fair Value or fair market value of property.

                    (b)  "Fair Value" means the fair value of the
               interests, rights, assets and/or properties assigned,
               leased, sold, transferred or otherwise disposed of (but, in
               the case of a lease, only to the extent of such lease) as
               may be determined by reference to (i) except in the case of
               a lease, the amount which would be likely to be obtained in
               an arm's-length transaction with respect to such interests,
               rights, assets and/or properties between an informed and
               willing buyer and an informed and willing seller, under no
               compulsion, respectively, to buy or sell, (ii) in the case
               of a lease, the amount (discounted to present value at a
               rate not lower than the taxable equivalent of the yield to
               maturity of the Bonds based on prevailing market prices
               immediately prior to the first public announcement of the
               proposed transaction) which would be likely to be obtained
               in an arm's-length transaction with respect to such
               interests, rights, assets and/or properties between an
               informed and willing lessee and an informed and willing
               lessor, neither under any compulsion to lease; (iii) the
               amount of investment with respect to such interests, rights,
               assets and/or properties which, together with a reasonable
               return thereon, would be likely to be recovered through
               ordinary business operations or otherwise, (iv) the cost,
               accumulated depreciation and replacement cost with respect
               to such interests, rights, assets and/or properties and/or
               (v) any other relevant factors; provided, however, that (x)
               Fair Value shall be determined without deduction for any
               mortgage, deed of trust, pledge, security interest,
               encumbrance, lease, reservation, restriction, servitude,
               charge or similar right or any other lien of any kind and
               (y) the Fair Value to the transferee of any property shall
               not reflect any reduction relating to the fact that such
               property may be of less value to a Person which is not the
               owner, lessee or operator of the property or any portion
               thereof than to a Person which is such owner, lessee or
               operator.  Fair Value may be determined, without physical
               inspection, by the use of accounting and engineering records
               and other data maintained by the Company or the transferee
               or otherwise available to the Independent Expert certifying
               the same.

               SECTION 7.02.  Instrument Furnished to the Authority and
          Trustee.  The Company shall, within fifteen (15) days after the
          delivery thereof, furnish to the Authority and the Trustee a true
          and complete copy of the agreements or other documents
          effectuating any such assignment, lease, sale, transfer or other
          disposition.

               SECTION 7.03.  Limitation.  This Agreement shall not be
          assigned nor shall the Facilities be leased, sold, transferred or
          otherwise disposed of, in whole or in part, except as provided in
          this Article VII or in Section 6.01 or 5.02 hereof.  This Article
          VII shall not apply to any sale, transfer or other disposition by
          the Company of all of its assets, as or substantially as an
          entirety, as contemplated in Section 6.01.


                                     ARTICLE VIII

                            EVENTS OF DEFAULT AND REMEDIES

               SECTION 8.01.  Events of Default.  Each of the following
          events shall constitute and is referred to in this Agreement as
          an "Event of Default":

                    (a)  a failure by the Company to make any Loan Payment,
               which failure shall have resulted in an "Event of Default"
               under clause (a) or (b) of Section 9.01 of the Indenture;

                    (b)  a failure by the Company to pay when due any
               amount required to be paid under this Agreement or to
               observe and perform any covenant, condition or agreement on
               its part to be observed or performed (other than a failure
               described in clause (a) above), which failure shall continue
               for a period of sixty (60) days after written notice,
               specifying such failure and requesting that it be remedied,
               shall have been given to the Company by the Authority or the
               Trustee, unless the Authority and the Trustee shall agree in
               writing to an extension of such period prior to its
               expiration; provided, however, that the Authority and the
               Trustee shall be deemed to have agreed to an extension of
               such period if corrective action is initiated by the Company
               within such period and is being diligently pursued; or

                    (c)  the dissolution or liquidation of the Company, or
               failure by the Company promptly to lift any execution,
               garnishment or attachment of such consequence as will impair
               its ability to make any payments under this Agreement, or
               the entry of an order for relief by a court of competent
               jurisdiction in any proceeding for its liquidation or
               reorganization under the provisions of any bankruptcy act or
               under any similar act which may be hereafter enacted, or an
               assignment by the Company for the benefit of its creditors,
               or the entry by the Company into an agreement of composition
               with its creditors (the term "dissolution or liquidation of
               the Company," as used in this clause, shall not be construed
               to include the cessation of the corporate existence of the
               Company resulting either from a merger or consolidation of
               the Company into or with another corporation or a
               dissolution or liquidation of the Company following a
               transfer of all or substantially all its assets as an
               entirety, under the conditions permitting such actions
               contained in Section 6.01 hereof).

               SECTION 8.02.  Force Majeure.  The provisions of Section
          8.01 hereof are subject to the following limitations: if by
          reason of acts of God; 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 Arizona, or
          any department, agency, political subdivision, court or official
          of any of them, or any civil or military authority;
          insurrections; riots; epidemics; landslides; lightning;
          earthquakes; volcanoes; fires; hurricanes; tornadoes; storms;
          floods; washouts; droughts; arrests; restraint of government and
          people; civil disturbances; explosions; breakage or accident to
          machinery; partial or entire failure of utilities; or any cause
          or event not reasonably within the control of the Company, the
          Company is unable in whole or in part to carry out any one or
          more of its agreements or obligations contained herein, other
          than its obligations under Sections 5.01, 5.03, 5.05, and 6.01
          hereof, the Company shall not be deemed in default by reason of
          not carrying out said agreement or agreements or performing said
          obligation or obligations during the continuance of such
          inability.  The Company shall make reasonable effort to remedy
          with all reasonable dispatch the cause or causes preventing it
          from carrying out its agreements; provided, 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.

               SECTION 8.03.  Remedies.  (a)  Upon the occurrence and
          continuance of any Event of Default described in clause (a) of
          Section 8.01 hereof, and further upon the condition that, in
          accordance with the terms of the Indenture, the Bonds shall have
          been declared to be immediately due and payable pursuant to any
          provision of the Indenture, the Loan Payments shall, without
          further action, become and be immediately due and payable.

               Any waiver of any "Event of Default" under the Indenture and
          a rescission and annulment of its consequences shall constitute a
          waiver of the corresponding Event or Events of Default under this
          Agreement and a rescission and annulment of the consequences
          thereof.

               (b)  Upon the occurrence and continuance of any Event of
          Default, the Authority, or the Trustee with respect to the rights
          of the Authority assigned to the Trustee by the Indenture, may
          take any action at law or in equity to collect any payments then
          due and thereafter to become due, or to enforce performance and
          observance of any obligation, agreement or covenant of the
          Company hereunder.

               (c)  Any amounts collected by the Trustee from the Company
          pursuant to this Section 8.03 shall be applied in accordance with
          the Indenture.

               SECTION 8.04.  No Remedy Exclusive.  No remedy conferred
          upon or reserved to the Authority hereby 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 hereunder 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 or power may be exercised from
          time to time and as often as may be deemed expedient.  In order
          to entitle the Authority to exercise any remedy reserved to it in
          this Article VIII, it shall not be necessary to give any notice,
          other than such notice as may be herein expressly required.

               SECTION 8.05.  Reimbursement of Attorneys' and Agents' Fees. 
          If the Company shall default under any of the provisions hereof
          and the Authority or the Trustee shall employ attorneys or agents
          or incur other reasonable expenses for the collection of payments
          due hereunder or for the enforcement of performance or observance
          of any obligation or agreement on the part of the Company
          contained herein, the Company will on demand therefor reimburse
          the Authority or the Trustee and any predecessor Trustee, as the
          case may be, for the reasonable fees of such attorneys and such
          other reasonable expenses so incurred.

               SECTION 8.06.  Waiver of Breach.  In the event any
          obligation created hereby shall be breached by either of the
          parties and such breach shall thereafter be waived by the other
          party, such waiver shall be limited to the particular breach so
          waived and shall not be deemed to waive any other breach
          hereunder.  In view of the assignment of certain of the
          Authority's rights and interest hereunder to the Trustee, the
          Authority shall have no power to waive any breach hereunder by
          the Company in respect of such rights and interest without the
          consent of the Trustee, and the Trustee may exercise any of such
          rights of the Authority hereunder.


                                      ARTICLE IX

                                 REDEMPTION OF BONDS

               SECTION 9.01.  Redemption of Bonds.  The Authority shall
          take, or cause to be taken, the actions required by the Indenture
          to discharge the lien created thereby through the redemption, or
          provision for payment or redemption, of all Bonds then
          Outstanding, or to effect the redemption, or provision for
          payment or redemption, of less than all the Bonds then
          Outstanding, upon receipt by the Authority and the Trustee from
          the Company of a notice designating the principal amount of the
          Bonds to be redeemed, or for the payment or redemption of which
          provision is to be made, and, in the case of redemption of Bonds,
          or provision therefor, specifying the date of redemption and the
          applicable redemption provision of the Indenture.  Such
          redemption date shall not be less than 45 days from the date such
          notice is given (unless a shorter notice is satisfactory to the
          Trustee).  Unless otherwise stated therein, such notice shall be
          revocable by the Company at any time prior to the time at which
          the Bonds to be redeemed, or for the payment or redemption of
          which provision is to be made, are first deemed to be paid in
          accordance with Article VIII of the Indenture.  The Company shall
          furnish any moneys or Government Obligations (as defined in the
          Indenture) required by the Indenture to be deposited with the
          Trustee or otherwise paid by the Authority in connection with any
          of the foregoing purposes.

               SECTION 9.02.  Compliance with the Indenture.  Anything in
          this Agreement to the contrary notwithstanding, the Authority and
          the Company shall take all actions required by this Agreement and
          the Indenture in order to comply with any provisions of the
          Indenture requiring the mandatory redemption of Bonds.


                                      ARTICLE X

                                    MISCELLANEOUS

               SECTION 10.01.  Term of Agreement.  This Agreement shall
          remain in full force and effect from the date hereof until the
          right, title and interest of the Trustee in and to the Trust
          Estate (as defined in the Indenture) shall have ceased,
          terminated and become void in accordance with Article VIII of the
          Indenture and until all payments required under this Agreement
          shall have been made.  Notwithstanding the foregoing, the
          covenants contained in Section 5.03, 5.04, Section 6.04 and 8.05
          hereof shall survive the termination of this Agreement.

               SECTION 10.02.  Notices.  Except as otherwise provided in
          this Agreement, all notices, certificates, requests, requisitions
          and other communications hereunder shall be in writing and shall
          be sufficiently given and shall be deemed given when mailed by
          registered mail, postage prepaid, addressed as follows: if to the
          Authority, c/o Russo, Cox & Russo, P.C., 1820 East River Road,
          Suite 230, Tucson, Arizona 85718; if to the Company, at 220 West
          Sixth Street, Tucson, Arizona 85702, Attention:  Treasurer; and
          if to the Trustee, at such address as shall be designated by it
          in the Indenture.  A copy of each notice, certificate, request or
          other communication given hereunder to the Authority, the
          Company, or the Trustee shall also be given to the others.  The
          Authority, the Company, and the Trustee may, by notice given
          hereunder, designate any further or different addresses to which
          subsequent notices, certificates, requests or other
          communications shall be sent.

               SECTION 10.03.  Parties in Interest.  This Agreement shall
          inure to the benefit of and shall be binding upon the Authority,
          the Company and their respective successors and assigns, and no
          other person, firm or corporation shall have any right, remedy or
          claim under or by reason of this Agreement; provided, however,
          that the rights and remedies granted to the Authority in Article
          VIII hereof, shall inure to the benefit of the Trustee, on behalf
          of the Owners from time to time of the Bonds, and shall be
          enforceable by the Trustee as a third party beneficiary or as
          assignee of the Authority; and provided, further, that neither
          Pima County, Arizona nor the State of Arizona shall in any event
          be liable for the payment of the principal of or premium, if any,
          or interest on the Bonds or for the performance of any pledge,
          mortgage, obligation or agreement created by or arising out of
          this Agreement or the issuance of the Bonds, and further that
          neither the Bonds nor any such obligation or agreement of the
          Authority shall be construed to constitute an indebtedness of
          Pima County, Arizona or the State of Arizona within the meaning
          of any constitutional or statutory provisions whatsoever, but
          shall be limited obligations of the Authority payable solely out
          of the revenues derived from this Agreement, or from the sale of
          the Bonds, or from the investment or reinvestment of any of the
          foregoing, as provided herein and in the Indenture.

               SECTION 10.04.  Amendments.  This Agreement may be amended
          only by written agreement of the parties hereto, subject to the
          limitations set forth herein and in the Indenture.

               SECTION 10.05.  Counterparts.  This Agreement may be
          executed in any number of counterparts, each of which, when so
          executed and delivered, shall be an original; but such
          counterparts shall together constitute but one and the same
          Agreement.

               SECTION 10.06.  Severability.  If any clause, provision or
          section of this Agreement shall, for any reason, be held illegal
          or invalid by any court, the illegality or invalidity of such
          clause, provision or section shall not affect any of the
          remaining clauses, provisions or sections hereof, and this
          Agreement shall be construed and enforced as if such illegal or
          invalid clause, provision or section had not been contained
          herein.  In case any agreement or obligation contained in this
          Agreement be held to be in violation of law, then such agreement
          or obligation shall be deemed to be the agreement or obligation
          of the Authority or the Company, as the case may be, to the full
          extent permitted by law.

               SECTION 10.07.  Governing Law.  The laws of the State of
          Arizona shall govern the construction and enforcement of this
          Agreement, except that the provisions of Section 13.09 of the
          Indenture, construed as provided in Section 13.07 of the
          Indenture, shall apply to this Agreement as if contained herein.

               SECTION 10.08.  Notice Regarding Cancellation of Contracts. 
          As required by the provisions of Section 38-511, Arizona Revised
          Statutes, as amended, notice is hereby given that political
          subdivisions of the State of Arizona or any of their departments
          or agencies may, within three (3) years of its execution, cancel
          any contract, without penalty or further obligation, made by the
          political subdivisions or any of their departments or agencies on
          or after September 30, 1988, if any person significantly involved
          in initiating, negotiating, securing, drafting or creating the
          contract on behalf of the political subdivisions or any of their
          departments or agencies is, at any time while the contract or any
          extension of the contract is in effect, an employee or agent of
          any other party to the contract in any capacity or a consultant
          to any other party of the contract with respect to the subject
          matter of the contract.  The cancellation shall be effective when
          written notice from the chief executive officer or governing body
          of the political subdivision is received by all other parties to
          the contract unless the notice specifies a later time.

               The Company covenants and agrees not to employ as an
          employee, agent or, with respect to the subject matter of this
          Agreement, a consultant, any person significantly involved in
          initiating, negotiating, securing, drafting or creating such
          Agreement on behalf of the Authority within three (3) years from
          the execution hereof, unless a waiver is provided by the
          Authority.


          <PAGE>


               IN WITNESS WHEREOF, the parties hereto have caused this Loan
          Agreement to be duly executed as of the day and year first above
          written.


                                   THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                   OF THE COUNTY OF PIMA


                                   By:  /s/ Stanley Lehman
                                      ---------------------------------
                                      President



                                   TUCSON ELECTRIC POWER COMPANY


                                   By:  /s/ Kevin Larson
                                      ---------------------------------
                                      Vice President


          <PAGE>


                                                                  EXHIBIT A

               A portion of the costs of the construction, improvement or
          equipping of the following Facilities will be refinanced with the
          proceeds of the Industrial Development Revenue Bonds, 1997 Series
          C (Tucson Electric Power Company Project) issued by The
          Industrial Development Authority of the County of Pima and
          referred to in the foregoing Loan Agreement.

                                 ____________________


               Certain high voltage transmission facilities and related
          improvements used to transmit energy from Unit No. 2 of the
          Springerville Generating Station located in Apache County,
          Arizona to the City of Tucson and environs in Pima County and to
          Fort Huachuca in adjacent Cochise County, Arizona and additions
          and improvements to the Irvington Generating Station located in
          the City of Tucson, more particularly described in the Tax
          Certificate and Agreement, dated as of October 1, 1997, between
          The Industrial Development Authority of the County of Pima and
          Tucson Electric Power Company.



                                                              Exhibit 4f   
          =================================================================




                                  INDENTURE OF TRUST
                                   (1997 SERIES C)


                                       BETWEEN



                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA



                                         AND



                    FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION




                                       --------




                            DATED AS OF SEPTEMBER 15, 1997



                                       --------




                                     Authorizing

                        Industrial Development Revenue Bonds,
                                    1997 Series C
                       (Tucson Electric Power Company Project)


          =================================================================


          <PAGE>

                                  TABLE OF CONTENTS*

                                                                       Page
                                                                       ----

             Parties  . . . . . . . . . . . . . . . . . . . . . . . . .   1
             Recitals . . . . . . . . . . . . . . . . . . . . . . . . .   1
             Granting Clause  . . . . . . . . . . . . . . . . . . . . .   2

                                      ARTICLE I

                                     DEFINITIONS

             Section 1.01.  Definitions . . . . . . . . . . . . . . . . . 2

                                      ARTICLE II

                                      THE BONDS

             Section 2.01.  Creation of Bonds . . . . . . . . . . . . . . 8
             Section 2.02.  Form of Bonds . . . . . . . . . . . . . . . . 8
             Section 2.03.  Execution of Bonds  . . . . . . . . . . . . . 9
             Section 2.04.  Authentication of Bonds . . . . . . . . . . . 9
             Section 2.05.  Bonds Not General Obligations . . . . . . . . 9
             Section 2.06.  Prerequisites to Authentication of Bonds  . . 9
             Section 2.07.  Lost or Destroyed Bonds or Bonds Canceled in
                            Error . . . . . . . . . . . . . . . . . . .  10
             Section 2.08.  Transfer, Registration and Exchange of 
                            Bonds . . . . . . . . . . . . . . . . . . .  10
             Section 2.09.  Other Obligations . . . . . . . . . . . . .  12
             Section 2.10.  Temporary Bonds . . . . . . . . . . . . . .  12
             Section 2.11.  Cancellation of Bonds . . . . . . . . . . .  12
             Section 2.12.  Payment of Principal and Interest . . . . .  13
             Section 2.13.  Applicability of Book-Entry Provisions  . .  13


                                     ARTICLE III

                                 REDEMPTION OF BONDS

             Section 3.01.  Redemption Provisions . . . . . . . . . . .  13
             Section 3.02.  Selection of Bonds to be Redeemed . . . . .  14
             Section 3.03.  Procedure for Redemption  . . . . . . . . .  15
             Section 3.04.  Payment of Redemption Price . . . . . . . .  15
             Section 3.05.  No Partial Redemption After Default . . . .  15



          ____________________

          *  This table of contents is not a part of the Indenture, and is
             for convenience only.  The captions herein are of no legal
             effect and do not vary the meaning or legal effect of any part
             of the Indenture.


          <PAGE>


                                      ARTICLE IV

                                    THE BOND FUND

             Section 4.01.  Creation of Bond Fund . . . . . . . . . . .  16
             Section 4.02.  Liens . . . . . . . . . . . . . . . . . . .  16
             Section 4.03.  Deposits into Bond Fund . . . . . . . . . .  16
             Section 4.04.  Use of Moneys in Bond Fund  . . . . . . . .  16
             Section 4.05.  Custody of Bond Fund; Withdrawal of Moneys   16
             Section 4.06.  Bonds Not Presented for Payment . . . . . .  16
             Section 4.07.  Moneys Held in Trust  . . . . . . . . . . .  17

                                      ARTICLE V

                               DISPOSITION OF PROCEEDS

             Section 5.01.  Disposition of Proceeds . . . . . . . . . .  17

                                      ARTICLE VI

                                     INVESTMENTS

             Section 6.01.  Investments . . . . . . . . . . . . . . . .  17

                                     ARTICLE VII

                                  GENERAL COVENANTS

             Section 7.01.  No General Obligations  . . . . . . . . . .  18
             Section 7.02.  Performance of Covenants of the Authority;
                            Representations . . . . . . . . . . . . . .  18
             Section 7.03.  Maintenance of Rights and Powers; Compliance
                            with Laws . . . . . . . . . . . . . . . . .  18
             Section 7.04.  Enforcement of Obligations of the Company;
                            Amendments  . . . . . . . . . . . . . . . .  19
             Section 7.05.  Further Instruments . . . . . . . . . . . .  19
             Section 7.06.  No Disposition of Trust Estate  . . . . . .  19
             Section 7.07.  Financing Statements  . . . . . . . . . . .  19
             Section 7.08.  Tax Covenants; Rebate Fund  . . . . . . . .  19
             Section 7.09.  Notices of Trustee  . . . . . . . . . . . .  20

                                     ARTICLE VIII

                                      DEFEASANCE

             Section 8.01.  Defeasance  . . . . . . . . . . . . . . . .  20

                                      ARTICLE IX

                                DEFAULTS AND REMEDIES

             Section 9.01.  Events of Default . . . . . . . . . . . . .  22
             Section 9.02.  Remedies  . . . . . . . . . . . . . . . . .  23
             Section 9.03.  Restoration to Former Position  . . . . . .  23
             Section 9.04.  Owners' Right to Direct Proceedings . . . .  23
             Section 9.05.  Limitation on Owners' Right to Institute
                            Proceedings . . . . . . . . . . . . . . . .  23
             Section 9.06.  No Impairment of Right to Enforce Payment .  24
             Section 9.07.  Proceedings by Trustee without Possession of
                            Bonds . . . . . . . . . . . . . . . . . . .  24
             Section 9.08.  No Remedy Exclusive . . . . . . . . . . . .  24
             Section 9.09.  No Waiver of Remedies . . . . . . . . . . .  24
             Section 9.10.  Application of Moneys . . . . . . . . . . .  24
             Section 9.11.  Severability of Remedies  . . . . . . . . .  25

                                      ARTICLE X

                TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

             Section 10.01. Acceptance of Trusts  . . . . . . . . . . .  25
             Section 10.02. No Responsibility for Recitals  . . . . . .  25
             Section 10.03. Limitations on Liability  . . . . . . . . .  26
             Section 10.04. Compensation, Expenses and Advances . . . .  26
             Section 10.05. Notice of Events of Default . . . . . . . .  27
             Section 10.06. Action by Trustee . . . . . . . . . . . . .  27
             Section 10.07. Good Faith Reliance . . . . . . . . . . . .  27
             Section 10.08. Dealings in Bonds and with the Authority and
                            the Company . . . . . . . . . . . . . . . .  27
             Section 10.09. Allowance of Interest . . . . . . . . . . .  28
             Section 10.10. Construction of Indenture . . . . . . . . .  28
             Section 10.11. Resignation of Trustee  . . . . . . . . . .  28
             Section 10.12. Removal of Trustee  . . . . . . . . . . . .  28
             Section 10.13. Appointment of Successor Trustee  . . . . .  28
             Section 10.14. Qualifications of Successor Trustee . . . .  29
             Section 10.15. Judicial Appointment of Successor Trustee .  29
             Section 10.16. Acceptance of Trusts by Successor Trustee .  29
             Section 10.17. Successor by Merger or Consolidation  . . .  29
             Section 10.18. Standard of Care  . . . . . . . . . . . . .  30
             Section 10.19. Notice to Owners of Bonds of Event of
                            Default . . . . . . . . . . . . . . . . . .  30
             Section 10.20. Intervention in Litigation of the Authority  30
             Section 10.21. Paying Agent; Co-Paying Agents  . . . . . .  30
             Section 10.22. Qualifications of Paying Agent and Co-Paying
                            Agents; Resignation; Removal  . . . . . . .  31
             Section 10.23. Registrar . . . . . . . . . . . . . . . . .  31
             Section 10.24. Qualifications of Registrar; Resignation;
                            Removal . . . . . . . . . . . . . . . . . .  32
             Section 10.25. Several Capacities  . . . . . . . . . . . .  32

                                      ARTICLE XI

                   EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                             PROOF OF OWNERSHIP OF BONDS

             Section 11.01. Execution of Instruments; 
                            Proof of Ownership  . . . . . . . . . . . .  32

                                     ARTICLE XII

                MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

             Section 12.01. Limitations . . . . . . . . . . . . . . . .  33
             Section 12.02. Supplemental Indentures without Owner
                            Consent . . . . . . . . . . . . . . . . . .  33
             Section 12.03. Supplemental Indentures with Consent of
                            Owners  . . . . . . . . . . . . . . . . . .  34
             Section 12.04. Effect of Supplemental Indenture  . . . . .  35
             Section 12.05. Consent of the Company  . . . . . . . . . .  35
             Section 12.06. Amendment of Loan Agreement without Consent
                            of Owners . . . . . . . . . . . . . . . . .  35
             Section 12.07. Amendment of Loan Agreement with Consent of
                            Owners  . . . . . . . . . . . . . . . . . .  35

                                     ARTICLE XIII

                                    MISCELLANEOUS

             Section 13.01. Successors of the Authority . . . . . . . .  36
             Section 13.02. Parties in Interest . . . . . . . . . . . .  36
             Section 13.03. Severability  . . . . . . . . . . . . . . .  36
             Section 13.04. No Personal Liability of Authority 
                            Officials . . . . . . . . . . . . . . . . .  36
             Section 13.05. Bonds Owned by the Authority or the Company  36
             Section 13.06. Counterparts  . . . . . . . . . . . . . . .  37
             Section 13.07. Governing Law . . . . . . . . . . . . . . .  37
             Section 13.08. Notices . . . . . . . . . . . . . . . . . .  37
             Section 13.09. Holidays  . . . . . . . . . . . . . . . . .  37
             Section 13.10. Statutory Notice Regarding Cancellation of
                            Contracts . . . . . . . . . . . . . . . . .  38


          Testimonium . . . . . . . . . . . . . . . . . . . . . . . .    40
          Signatures and Seals  . . . . . . . . . . . . . . . . . . .    40

          Exhibit A - Form of Bond  . . . . . . . . . . . . . . . . . . A-1
          Exhibit B - Form of Endorsement of Transfer . . . . . . . . . B-1
          Exhibit C - Form of Certificate of Authentication . . . . . . C-1


          <PAGE>


                                  INDENTURE OF TRUST

               THIS INDENTURE OF TRUST (1997 C Series), dated as of
          September 15, 1997 (this "Indenture"), between THE INDUSTRIAL
          DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit
          corporation designated by law as a political subdivision of the
          State of Arizona (hereinafter called the "Authority"), and First
          Trust of New York, National Association, as trustee (hereinafter
          called the "Trustee"),

                                W I T N E S S E T H :


               WHEREAS, the Authority is authorized and empowered under
          Title 35, Chapter 5, Arizona Revised Statutes, as amended (the
          "Act"), to issue its bonds in accordance with the Act and to make
          secured or unsecured loans for the purpose of financing or
          refinancing the acquisition, construction, improvement or
          equipping of projects consisting of land, any building or other
          improvement, and all real and personal properties, including but
          not limited to machinery and equipment, whether or not now in
          existence or under construction, whether located within or
          without Pima County, which shall be suitable for, among other
          things, facilities for the furnishing of electric energy, gas or
          water, air and water pollution control facilities and sewage and
          solid waste disposal facilities, and to charge and collect
          interest on such loans and pledge the proceeds of loan agreements
          as security for the payment of the principal of and interest on
          bonds, or designated issues of bonds, issued by the Authority and
          any agreements made in connection therewith, whenever the Board
          of Directors of the Authority finds such loans to be in
          furtherance of the purposes of the Authority or in the public
          interest;

               WHEREAS, the Authority has heretofore issued and sold
          $75,000,000 aggregate principal amount of its Industrial
          Development Revenue Bonds, 1983 Series A (Tucson Electric Power
          Company General Project) all of which remain outstanding (the
          "1983 Bonds), the proceeds of which were loaned to Tucson
          Electric Power Company, an Arizona corporation (the "Company") to
          finance a portion of the costs of the acquisition, construction,
          improvement and equipping of certain of its facilities for the
          furnishing of electric energy (the "Facilities"); and

               WHEREAS, the Authority proposes to issue and sell its
          revenue bonds as provided herein (the "Bonds") to refinance, by
          the payment or redemption of the 1983 Bonds, or provision
          therefor, the portion of the costs of the acquisition,
          construction, improvement and equipping of the Facilities paid
          from the proceeds of the 1983 Bonds, all as described in Exhibit
          A to the Loan Agreement, dated as of September 15, 1997 (the
          "Loan Agreement"), between the Authority and the Company;

               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 Owners (as hereinafter defined)
          thereof and of the sum of one dollar lawful money of the United
          States of America, to it duly paid by the Trustee at or before
          the execution and delivery of these presents, and for other good
          and valuable consideration the receipt and sufficiency of which
          are 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 Authority of all the covenants and
          conditions expressed or implied herein and contained in the
          Bonds, the Authority does hereby grant, bargain, sell, convey,
          mortgage, pledge and assign, and grant a security interest in,
          the Trust Estate (as hereinafter defined) to the Trustee, its
          successors in trust and their assigns forever;

               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, first, for the equal and proportionate benefit and
          security of all Owners of the Bonds issued under and secured by
          this Indenture without preference, priority or distinction as to
          the 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
          VIII hereof, the principal of and premium, if any, and interest
          on the Bonds shall have been paid to the Owners thereof, or shall
          have been paid to the Company pursuant to Section 4.06 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 Authority and the Company such instruments in
          writing as shall be requisite to evidence the discharge hereof;
          otherwise this Indenture is 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 as hereinafter expressed, and the Authority has agreed
          and covenanted, and does hereby agree and covenant, with the
          Trustee and with the respective Owners, from time to time, of the
          Bonds, as follows:


                                      ARTICLE I

                                     DEFINITIONS

               Section 1.01.  Definitions.  The terms defined in this
          Article I shall, for all purposes of this Indenture, have the
          meanings herein specified, unless the context clearly requires
          otherwise:

          Act:

               "Act" shall mean Title 35, Chapter 5, Arizona Revised
          Statutes, and all acts supplemental thereto or amendatory
          thereof.

          Administration Expenses:

               "Administration Expenses" shall mean the reasonable expenses
          incurred by the Authority with respect to the Loan Agreement,
          this Indenture and any transaction or event contemplated by the
          Loan Agreement or this Indenture, including the compensation and
          reimbursement of expenses and advances payable to the Trustee, to
          the Paying Agent, any Co-Paying Agent and the Registrar and a pro
          rata share of the Authority's annual operating expenses in
          accordance with the provisions of paragraph XII.D. of the
          Authority's Procedural Pamphlet.

          Authority:

               "Authority" shall mean The Industrial Development Authority
          of the County of Pima, an Arizona nonprofit corporation
          designated by law as a political subdivision of the State of
          Arizona incorporated for and with the approval of Pima County,
          Arizona, pursuant to the provisions of the Constitution of the
          State of Arizona and the Act, its successors and their assigns.

          Authorized Company Representative:

               "Authorized Company Representative" shall mean each person
          at the time designated to act on behalf of the Company by written
          certificate furnished to the Authority and the Trustee containing
          the specimen signature of such person and signed on behalf of the
          Company by its President, any Vice President or its Treasurer,
          together with its Secretary or any Assistant Secretary.

          Bond Counsel:

               "Bond Counsel" shall mean any firm or firms of nationally
          recognized bond counsel experienced in matters pertaining to the
          validity of, and exclusion from gross income for federal tax
          purposes of interest on bonds issued by states and political
          subdivisions, selected by the Company and acceptable to the
          Authority.

          Bond Fund:

          "Bond Fund" shall mean the fund created by Section 4.01 hereof.

          Bonds:

               "Bond" or "Bonds" shall mean the bonds authorized to be
          issued under this Indenture.

          Code:

               "Code" shall mean the Internal Revenue Code of 1986 or any
          successor statute thereto.  Each reference to a section of the
          Code herein shall be deemed to include the United States Treasury
          Regulations proposed or in effect thereunder and applicable to
          the Bonds or the use of proceeds thereof, unless the context
          clearly requires otherwise.  References to any particular Code
          section shall, in the event of a successor Code, be deemed to be
          a reference to the successor to such Code section.

          Company:

               "Company" shall mean Tucson Electric Power Company, a
          corporation organized and existing under the laws of the State of
          Arizona, its successors and their assigns, including, without
          limitation, any successor obligor under Section 6.01 or 7.01 of
          the Loan Agreement to the extent of the obligations assumed
          thereunder.

          Depositary:

               "Depositary" shall mean The Depository Trust Company or any
          successor thereto as a securities repository for the Bonds.

          Facilities:

               "Facilities" shall mean the real and personal properties,
          machinery and equipment currently existing, under construction
          and to be constructed which are described in Exhibit A to the
          Loan Agreement, as revised from time to time to reflect any
          changes therein, additions thereto, substitutions therefor and
          deletions therefrom permitted by the terms of the Loan Agreement,
          subject, however, to the provisions of Section 7.01 of the Loan
          Agreement.

          Government Obligations:

               "Government Obligations" shall mean:

                    (a) direct obligations of, or obligations the principal
               of and interest on which are unconditionally guaranteed by,
               the United States of America entitled to the benefit of the
               full faith and credit thereof; and

                    (b) certificates, depositary receipts or other
               instruments which evidence a direct ownership interest in
               obligations described in clause (a) above or in any specific
               interest or principal payments due in respect thereof;
               provided, however, that the custodian of such obligations or
               specific interest or principal payments shall be a bank or
               trust company organized under the laws of the United States
               of America or of any state or territory thereof or of the
               District of Columbia, with a combined capital stock surplus
               and undivided profits of at least $50,000,000; and provided,
               further, that except as may be otherwise required by law,
               such custodian shall be obligated to pay to the holders of
               such certificates, depositary receipts or other instruments
               the full amount received by such custodian in respect of
               such obligations or specific payments and shall not be
               permitted to make any deduction therefrom.

          Indenture:

               "Indenture" shall mean this Indenture of Trust, dated as of
          September 15, 1997, between the Authority and the Trustee, and
          any and all modifications, alterations, amendments and
          supplements thereto.

          Investment Securities:

               "Investment Securities" shall mean any of the following
          obligations or securities on which neither the Company nor any of
          its subsidiaries is the obligor: (a) Government Obligations; (b)
          interest bearing deposit accounts (which may be represented by
          certificates of deposit) in national, state or foreign banks
          having a combined capital and surplus of not less than
          $10,000,000; (c) bankers' acceptances drawn on and accepted by
          commercial banks having a combined capital and surplus of not
          less than $10,000,000; (d) (i) direct obligations of, (ii)
          obligations the principal of and interest on which are
          unconditionally guaranteed by, and (iii) any other obligations
          the interest on which is exempt from federal income taxation
          issued by, any state of the United States of America, the
          District of Columbia or the Commonwealth of Puerto Rico, or any
          political subdivision, agency, authority or other instrumentality
          of any of the foregoing, which, in any case, are rated by a
          nationally recognized rating agency in any of its three highest
          rating categories; (e) obligations of any agency or
          instrumentality of the United States of America; (f) commercial
          or finance company paper which is rated by a nationally
          recognized rating agency in any of its three highest rating
          categories; (g) corporate debt securities issued by corporations
          having debt securities rated by a nationally recognized rating
          agency in any of its three highest rating categories; (h)
          repurchase agreements with banking or financial institutions
          having a combined capital and surplus of not less than
          $10,000,000 with respect to any of the foregoing obligations or
          securities; (i) shares or interests in registered investment
          companies whose assets consist of obligations or securities which
          are described in any other clause of this sentence; and (j) any
          other obligations which may lawfully be purchased by the Trustee. 
          The commercial banks and banking institutions referred to above
          may include the entities acting as Trustee, Paying Agent,
          Co-Paying Agent or Registrar hereunder if such entities shall
          otherwise satisfy the requirements set forth above.

          Loan Agreement:

               "Loan Agreement" shall mean the Loan Agreement, dated as of
          September 15, 1997, between the Authority and the Company
          relating to the Bonds, and any and all modifications,
          alterations, amendments and supplements thereto.

          Loan Payments:

               "Loan Payments" shall mean the payments required to be made
          by the Company pursuant to Section 5.01 of the Loan Agreement.

          1954 Code:

               "1954 Code" shall mean the Internal Revenue Code of 1954, as
          amended.

          1983 Bonds:

               "1983 Bonds" shall mean the $75,000,000 aggregate principal
          amount of the Authority's Industrial Development Revenue Bonds,
          1983 Series A (Tucson Electric Power Company General Project).

          Notice by Mail:

               "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 Owners of
          specified registered Bonds at the addresses shown in the
          registration books maintained pursuant to Section 2.08 hereof;
          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, then such giving of notice in lieu thereof,
          which may include publication, as shall be made with the approval
          of the Trustee (or, if there be no trustee hereunder, the
          Authority) shall constitute a sufficient giving of such notice.

          Notice by Publication:

               "Notice by Publication" or "notice" of any action or
          condition "by Publication" shall mean publication of a notice
          meeting the requirements of this Indenture in a newspaper or
          financial journal of general circulation in The City of New York,
          New York, which carries financial news, is printed in the English
          language and is customarily published on each business day;
          provided, however, that any successive weekly publication of
          notice required hereunder may be made, unless otherwise expressly
          provided herein, on the same or different days of the week and in
          the same or different newspapers or financial journals; and
          provided, further, that if, because of the temporary or permanent
          suspension of the publication or general circulation of any
          newspaper or financial journal or for any other reason, it is
          impossible or impracticable to publish such notice in the manner
          herein described, then such publication in lieu thereof as shall
          be made with the approval of the Trustee (or, if there be no
          trustee hereunder, the Authority) shall constitute a sufficient
          publication of such notice.

          Outstanding:

               "Outstanding", when used in reference to the Bonds, shall
          mean, as at any particular date, the aggregate of all Bonds
          authenticated and delivered under this Indenture except:

                    (a) those canceled by the Trustee at or prior to such
               date or delivered to or acquired by the Trustee at or prior
               to such date for cancellation;

                    (b) those deemed to be paid in accordance with Article
               VIII hereof; and

                    (c) those in lieu of or in exchange or substitution for
               which other Bonds shall have been authenticated and
               delivered pursuant to this Indenture, unless proof
               satisfactory to the Trustee and the Company is presented
               that such Bonds are held by a bona fide holder in due
               course.

          Owner:

               "Owner" shall mean the person in whose name any Bond is
          registered upon the registration books maintained pursuant to
          Section 2.08 hereof.  The Company may be an Owner.

          Paying Agent; Co-Paying Agent; Principal Office thereof:

               "Paying Agent" and "Co-Paying Agent" shall mean the paying
          agent and any co-paying agent appointed in accordance with
          Section 10.21 hereof.  "Principal Office" of the Paying Agent or
          any Co-Paying Agent shall mean the office thereof designated in
          writing to the Trustee.

          Rebate Fund:

               "Rebate Fund" shall mean the fund created by Section 7.08
          hereof.

          Receipts and Revenues of the Authority from the Loan Agreement:

               "Receipts and Revenues of the Authority from the Loan
          Agreement" shall mean all moneys paid or payable to the Trustee
          for the account of the Authority by the Company in respect of the
          Loan Payments and payments pursuant to Section 9.01 of the Loan
          Agreement and all receipts of the Trustee which, under the
          provisions of this Indenture, reduce the amount of such payments.

          Record Date:

               "Record Date" shall mean the close of business on the
          fifteenth (15th) day of the calendar month immediately preceding
          each regularly scheduled interest payment date.

          Registrar; Principal Office thereof:

               "Registrar" shall mean the registrar appointed in accordance
          with Section 10.23 hereof.  "Principal Office" of the Registrar
          shall mean the office thereof designated in writing to the
          Trustee.

          Supplemental Indenture:

               "Supplemental Indenture" shall mean any indenture of the
          Authority modifying, altering, amending, supplementing or
          confirming this Indenture for any purpose, in accordance with the
          terms hereof.

          Supplemental Loan Agreement:

               "Supplemental Loan Agreement" shall mean any agreement
          between the Authority and the Company modifying, altering,
          amending or supplementing the Loan Agreement, in accordance with
          the terms thereof and hereof.

          Tax Agreement:

               "Tax Agreement" shall mean that tax certificate and
          agreement, dated the date of the initial authentication and
          delivery of the Bonds, between the Authority and the Company,
          relating to the requirements of the Code and the 1954 Code, and
          any and all modifications, alterations, amendments and
          supplements thereto.

          Trust Estate:

               "Trust Estate" shall mean at any particular time all right,
          title and interest of the Authority in and to the Loan Agreement
          (except its rights under Sections 5.03, 5.04, 6.03 and 8.05
          thereof and any rights of the Authority to receive notices,
          certificates, requests, requisitions and other communications
          thereunder), including without limitation, the Receipts and
          Revenues of the Authority from the Loan Agreement, the Bond Fund
          and all moneys and Investment Securities from time to time on
          deposit therein (excluding, however, any moneys or Investment
          Securities held in the Rebate Fund), any and all other moneys and
          obligations (other than Bonds) which at such time are deposited
          or are required to be deposited with, or are held or are required
          to be held by or on behalf of, the Trustee, the Paying Agent or
          any Co-Paying Agent in trust under any of the provisions of this
          Indenture and all other rights, titles and interests which at
          such time are subject to the lien of this Indenture; provided,
          however, that in no event shall there be included in the Trust
          Estate (a) moneys or obligations deposited with or held by the
          Trustee in the Rebate Fund pursuant to Section 7.08 hereof or (b)
          moneys or obligations deposited with or paid to the Trustee for
          the redemption or payment of Bonds which are deemed to have been
          paid in accordance with Article VIII hereof or moneys held
          pursuant to Section 4.06 hereof.

          Trustee; Principal Office thereof:

               "Trustee" shall mean First Trust of New York, National
          Association, as trustee under this Indenture, its successors in
          trust and their assigns.  "Principal Office" of the Trustee shall
          mean the principal corporate trust office of the Trustee, which
          office at the date of acceptance by the Trustee of the duties and
          obligations imposed on the Trustee by this Indenture is located
          at the address specified in Section 13.08 hereof.


                                      ARTICLE II

                                      THE BONDS

               Section 2.01.  Creation of Bonds.  There is hereby
          authorized and created under this Indenture, for the purpose of
          providing moneys to pay, or redeem, or provide for the redemption
          therefor, of the 1983 Bonds, an issue of Bonds, entitled to the
          benefit, protection and security of this Indenture, in the
          aggregate principal amount of Seventy-Five Million Dollars
          ($75,000,000).  Each of the Bonds shall be designated by the
          title "The Industrial Development Authority of the County of Pima
          Industrial Development Revenue Bond, 1997 Series C (Tucson
          Electric Power Company Project)".  The Bonds shall mature,
          subject to prior redemption upon the terms and conditions
          hereinafter set forth, on September 1, 2029 and shall bear
          interest from the date thereof 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, at the rate of six per centum (6%) per
          annum, with interest thereon payable semi-annually on each March
          1 and September 1, commencing March 1, 1998.  Interest shall be
          calculated on the basis of a 360-day year consisting of twelve
          30-day months.

               Section 2.02.  Form of Bonds.  Bonds shall be authenticated
          and delivered hereunder solely as fully registered bonds without
          coupons in the denomination of $5,000 or integral multiples
          thereof.  Bonds shall be numbered as determined by the Trustee. 
          Bonds authenticated prior to the first interest payment date
          shall be dated September 15, 1997.  Bonds authenticated on or
          subsequent to the first interest payment date shall be dated the
          interest payment date next preceding the date of authentication
          thereof, unless such date of authentication shall be an interest
          payment date to which interest on the Bonds has been paid in full
          or duly provided for, in which case they shall be dated such date
          of authentication; 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 be dated the date to which interest
          has been paid in full on the Bonds surrendered.

               Principal of and premium, if any, on Bonds shall be payable
          to the Owners of such Bonds upon presentation and surrender of
          such Bonds at the Principal Office of the Paying Agent or any
          Co-Paying Agent.  Interest on the Bonds shall be paid by check
          drawn upon the Paying Agent and mailed to the Owners of such
          Bonds as of the close of business on the Record Date with respect
          to each interest payment date at the registered addresses of such
          Owners as they shall appear as of the close of business on such
          Record Date on the registration books maintained pursuant to
          Section 2.08 hereof notwithstanding the cancellation of any such
          Bond upon any exchange or registration of transfer subsequent to
          such Record Date, except that if and to the extent that there
          should be a default on the payment of interest on any Bond, such
          defaulted interest shall be paid to the Owners in whose name such
          Bond (or any Bond or Bonds issued upon any exchange or
          registration of transfer thereof) is registered as of the close
          of business on a date selected by the Trustee in its discretion,
          but not more than 15 days or less than 10 days prior to the date
          of payment of such defaulted interest; notwithstanding the
          foregoing, upon request to the Paying Agent by an Owner of not
          less than $1,000,000 in aggregate principal amount of Bonds,
          interest on such Bonds and, after presentation and surrender of
          such Bonds, the principal thereof shall be paid to such Owner by
          wire transfer to the account maintained within the continental
          United States specified by such Owner or, if such Owner maintains
          an account with the entity acting as Paying Agent, by deposit
          into such account.  Payment as aforesaid shall be made in such
          coin or currency of the United States of America as, at the
          respective times of payment, shall be legal tender for the
          payment of public and private debts.

               The Bonds and the form for registration of transfer and the
          form of certificate of authentication to be printed on the Bonds
          are to be in substantially the forms thereof set forth in
          Exhibits A, B and C hereto, respectively, with necessary or
          appropriate variations, omissions and insertions as permitted or
          required by this Indenture.

               Section 2.03.  Execution of Bonds.  The Bonds shall be
          executed on behalf of the Authority by the President or a Vice
          President of the Authority and shall have affixed, impressed or
          reproduced thereon the official seal of the Authority which shall
          be attested by the Secretary or an Assistant Secretary of the
          Authority.  Each of the foregoing officers may execute or cause
          to be executed with a facsimile signature in lieu of his manual
          signature the Bonds, provided the signature of either the
          President or a Vice President of the Authority or the Secretary
          or Assistant Secretary of the Authority shall, if required by
          applicable laws, be manually subscribed.

               In case any officer of the Authority whose signature or a
          facsimile of whose signature shall appear on the Bonds shall
          cease to be such officer before the authentication by the Trustee
          and delivery of such Bonds, such signature or such facsimile
          shall nevertheless be valid and sufficient for all purposes, the
          same as if such officer had remained in office until delivery;
          and any Bond may be signed on behalf of the Authority by such
          persons as, at the time of execution of such Bond, shall be the
          proper officers of the Authority, even though at the date of such
          Bond or of the execution and delivery of this Indenture any such
          person was not such officer.

               Section 2.04.  Authentication of Bonds.  Only such Bonds as
          shall have endorsed thereon a certificate of authentication
          substantially in the form set forth in Exhibit C hereto duly
          executed by the Trustee shall be entitled to any right or benefit
          under this Indenture.  No Bond shall be valid or obligatory for
          any purpose unless and until such certificate of authentication
          shall have been duly executed by the Trustee, and such executed
          certificate of authentication of the Trustee upon any such Bonds
          shall be conclusive evidence that such Bond has been
          authenticated and delivered under this Indenture.  The Trustee's
          certificate of authentication on any Bond shall be deemed to have
          been executed by it if signed with an authorized signature of the
          Trustee, but it shall not be necessary that the same person sign
          the certificate of authentication on all of the Bonds issued
          hereunder.  This Section 2.04 is subject to the provisions of
          Section 10.17 hereof.

               Section 2.05.  Bonds Not General Obligations.  Neither Pima
          County, Arizona nor the State of Arizona shall in any event be
          liable for the payment of the principal of or premium, if any, or
          interest on the Bonds, and neither the Bonds nor the premium, if
          any, or the interest thereon, shall be construed to constitute an
          indebtedness of Pima County, Arizona or the State of Arizona
          within the meaning of any constitutional or statutory provisions
          whatsoever.  The Bonds and the premium, if any, and the interest
          thereon shall be limited obligations of the Authority payable
          solely from the Receipts and Revenues of the Authority from the
          Loan Agreement and the other moneys pledged therefor under this
          Indenture, and such fact shall be plainly stated on the face of
          each Bond.

               Section 2.06.  Prerequisites to Authentication of Bonds. 
          The Authority shall execute and deliver to the Trustee and the
          Trustee shall authenticate the Bonds and deliver said Bonds to
          the initial purchasers thereof as may be directed hereinafter in
          this Section 2.06.

               Prior to the delivery on original issuance by the Trustee of
          any authenticated Bonds there shall be or have been delivered to
          the Trustee:

                    (a) a duly certified copy of a resolution of the Board
               of Directors of the Authority authorizing the execution and
               delivery of this Indenture and the Loan Agreement and the
               issuance of the Bonds;

                    (b) an original duly executed counterpart or a duly
               certified copy of the Loan Agreement;

                    (c) a request and authorization to the Trustee on
               behalf of the Authority, signed by its President or a Vice
               President, to authenticate and deliver the Bonds in the
               aggregate principal amount determined by this Indenture to
               the purchaser or purchasers therein identified upon payment
               to the Trustee, but for the account of the Authority, of a
               sum specified in such request and authorization plus any
               accrued interest on such Bonds to the date of delivery; and

                    (d) a written statement on behalf of the Company,
               executed by the President, any Vice President or the
               Treasurer, (i) approving the issuance and delivery of the
               Bonds and (ii) consenting to each and every provision of
               this Indenture.

               Section 2.07.  Lost or Destroyed Bonds or Bonds Canceled in
          Error.  If any Bond, whether in temporary or definitive form, is
          lost (whether by reason of theft or otherwise), destroyed
          (whether by mutilation, damage, in whole or in part, or
          otherwise) or canceled in error, the Authority may execute and
          the Trustee may authenticate a new Bond of like date and
          denomination and bearing a number not contemporaneously
          outstanding; provided that (a) in the case of any mutilated Bond,
          such mutilated Bond shall first be surrendered to the Trustee and
          (b) in the case of any lost Bond or Bond destroyed in whole,
          there shall be first furnished to the Authority, the Trustee and
          the Company evidence of such loss or destruction.  In every case,
          the applicant for a substitute Bond shall furnish the Authority,
          the Trustee and the Company such security or indemnity as may be
          required by any of them.  In the event any lost or destroyed Bond
          or a Bond canceled in error shall have matured or is about to
          mature, or has been called for redemption, instead of issuing a
          substitute Bond the Trustee may, in its discretion, pay the same
          without surrender thereof if there shall be first furnished to
          the Authority, the Trustee and the Company evidence of such loss,
          destruction or cancellation, together with indemnity,
          satisfactory to them.  Upon the issuance of any substitute Bond,
          the Authority and the Trustee may require the payment of a sum
          sufficient to cover any tax or other governmental charge that may
          be imposed in relation thereto.  The Trustee may charge the Owner
          of any such Bond with the Trustee's reasonable fees and expenses
          in connection with any transaction described in this Section
          2.07.

               Every substitute Bond issued pursuant to the provisions of
          this Section 2.07 by virtue of the fact that any Bond is lost,
          destroyed or canceled in error shall constitute an additional
          contractual obligation of the Authority, whether or not the Bond
          so lost, destroyed or canceled shall be at any time enforceable,
          and shall be entitled to all the benefits of this Indenture
          equally and proportionately with any and all other Bonds duly
          issued hereunder.  All Bonds shall be held and owned upon the
          express condition that, to the extent permitted by law, the
          foregoing provisions are exclusive with respect to the
          replacement or payment of lost, destroyed or improperly canceled
          Bonds, notwithstanding any law or statute now existing or
          hereafter enacted.

               Section 2.08.  Transfer, Registration and Exchange of Bonds. 
          The Registrar shall maintain and keep, at its Principal Office,
          books for the registration and registration of transfer of Bonds,
          which, at all reasonable times, shall be open for inspection by
          the Authority, the Trustee and the Company; and, upon
          presentation for such purpose of any Bond entitled to
          registration or registration of transfer at the Principal Office
          of the Registrar, the Registrar shall register or register the
          transfer in such books, under such reasonable regulations as the
          Registrar may prescribe.  The Registrar shall make all necessary
          provisions to permit the exchange or registration of transfer of
          Bonds at its Principal Office.

               The transfer of any Bond shall be registered upon the
          registration books of the Registrar at the written request of the
          Owner thereof or his attorney duly authorized in writing, upon
          surrender thereof at the Principal Office of the Registrar,
          together with a written instrument of transfer satisfactory to
          the Registrar duly executed by the Owner or his duly authorized
          attorney.  Upon the registration of transfer of any such Bond or
          Bonds, the Authority shall issue in the name of the transferee,
          in authorized denominations, a new Bond or Bonds in the same
          aggregate principal amount as the surrendered Bond or Bonds.

               The Authority, the Trustee, the Paying Agent, any Co-Paying
          Agent and the Registrar may deem and treat the Owner of any Bond
          as the absolute owner of such Bond, whether such Bond shall be
          overdue or not, for the purpose of receiving payment of, or on
          account of, the principal of and premium, if any, and, except as
          provided in Section 2.02 hereof, interest on, such Bond and for
          all other purposes, and neither the Authority, the Trustee, the
          Paying Agent, any Co-Paying Agent nor the Registrar shall be
          affected by any notice to the contrary.  All such payments so
          made to any such Owner or upon his order shall be valid and
          effective to satisfy and discharge the liability upon such Bond
          to the extent of the sum or sums so paid.

               Bonds, upon surrender thereof at the Principal Office of the
          Registrar may, at the option of the Owner thereof, be exchanged
          for an equal aggregate principal amount of Bonds of any
          authorized denomination.

               In all cases in which the privilege of exchanging Bonds or
          registering the transfer of Bonds is exercised, the Authority
          shall execute and the Trustee shall authenticate and deliver
          Bonds in accordance with the provisions of this Indenture.  For
          every such exchange or registration of transfer of Bonds, whether
          temporary or definitive, the Authority, the Registrar, or the
          Trustee may make a charge sufficient to reimburse it for any tax
          or other governmental charge required to be paid with respect to
          such exchange or registration of transfer, which sum or sums
          shall be paid by the person requesting such exchange or
          registration of transfer as a condition precedent to the exercise
          of the privilege of making such exchange or registration of
          transfer.  The Registrar shall not be obligated (a) to make any
          such exchange or registration of transfer of Bonds during the
          fifteen (15) days next preceding the date on which notice of any
          proposed redemption of Bonds is given or (b) to make any exchange
          or registration of transfer of any Bonds called for redemption.

               The Bonds are to be initially registered in the name of Cede
          & Co., as nominee for the Depositary.  Such Bonds shall not be
          transferable or exchangeable, nor shall any purported transfer be
          registered, except as follows:

                    (a) such Bonds may be transferred in whole, and
               appropriate registration of transfer effected, if such
               transfer is by such nominee to the Depositary, or by the
               Depositary to another nominee thereof, or by any nominee of
               the Depositary to any other nominee thereof, or by the
               Depositary or any nominee thereof to any successor
               securities depositary or any nominee thereof; and

                    (b) such Bond may be exchanged for definitive Bonds
               registered in the respective names of the beneficial holders
               thereof, and thereafter shall be transferable without
               restriction, if:

                    (i)  the Depositary shall have notified the Company and
               the Trustee that it is unwilling or unable to continue to
               act as securities depositary with respect to such Bonds and
               the Trustee shall not have been notified by the Company
               within ninety (90) days of the identity of a successor
               securities depositary with respect to such Bonds;

                    (ii)  the Company shall have delivered to the Trustee a
               written instrument to the effect that such Bonds shall be so
               exchangeable on and after a date specified therein; or

                    (iii)  (1) an Event of Default shall have occurred and
               be continuing, (2) the Trustee shall have given notice of
               such Event of Default pursuant to Section 10.19 hereof and
               (3) there shall have been delivered to the Authority, the
               Company and the Trustee an opinion of counsel to the effect
               that the interests of the beneficial owners of such Bonds in
               respect thereof will be materially impaired unless such
               owners become owners of definitive Bonds.

               The Bonds delivered to the Depositary may contain a legend
          reflecting the foregoing restrictions on registration of transfer
          and exchange.

               Section 2.09.  Other Obligations.  The Authority expressly
          reserves the right to issue, to the extent permitted by law, but
          shall not be obligated to issue, obligations under another
          indenture or indentures to provide additional funds to pay the
          cost of construction of the Facilities or to refund all or any
          principal amount of the Bonds, or any combination thereof.

               Section 2.10  Temporary Bonds.  Pending the preparation of
          definitive Bonds, the Authority may execute and the Trustee shall
          authenticate and deliver temporary Bonds.  Temporary Bonds shall
          be issuable as registered Bonds without coupons, of any
          authorized denomination, and substantially in the form of the
          definitive Bonds but with such omissions, insertions and
          variations as may be appropriate for temporary Bonds, all as may
          be determined by the Authority.  Temporary Bonds may contain such
          reference to any provisions of this Indenture as may be
          appropriate.  Every temporary Bond shall be executed by the
          Authority and be authenticated by the Trustee upon the same
          conditions and in substantially the same manner, and with like
          effect, as the definitive Bonds.  As promptly as practicable the
          Authority shall execute and shall furnish definitive Bonds and
          thereupon temporary Bonds may be surrendered in exchange therefor
          without charge at the Principal Office of the Trustee, and the
          Trustee shall authenticate and deliver in exchange for such
          temporary Bonds a like aggregate principal amount of definitive
          Bonds of authorized denominations.  Until so exchanged the
          temporary Bonds shall be entitled to the same benefits under this
          Indenture as definitive Bonds.

               Section 2.11.  Cancellation of Bonds.  All Bonds which shall
          have been surrendered to the Paying Agent or any Co-Paying Agent
          for payment or redemption, and all Bonds which shall have been
          surrendered to the Registrar for exchange or registration of
          transfer, shall be delivered to the Trustee for cancellation. 
          All Bonds delivered to or acquired by the Trustee for
          cancellation shall be canceled and destroyed by the Trustee.  The
          Trustee shall furnish to the Authority, the Paying Agent, the
          Registrar and the Company counterparts of certificates evidencing
          such cancellation and destruction and specifying such Bonds by
          number.

               Section 2.12.  Payment of Principal and Interest.  For the
          payment of interest on the Bonds, the Authority shall cause to be
          deposited in the Bond Fund, on each interest payment date, solely
          out of the Receipts and Revenues of the Authority from the Loan
          Agreement and other moneys pledged therefor, an amount sufficient
          to pay the interest to become due on such interest payment date. 
          The obligation of the Authority to cause any such deposit to be
          made hereunder shall be reduced by the amount of moneys in the
          Bond Fund available on such interest payment date for the payment
          of interest on the Bonds.

               For the payment of the principal of the Bonds upon maturity,
          the Authority shall cause to be deposited in the Bond Fund, on
          the stated or accelerated date of maturity, solely out of the
          Receipts and Revenues of the Authority from the Loan Agreement
          and other moneys pledged therefor, an amount sufficient to pay
          the principal of the Bonds.  The obligation of the Authority to
          cause any such deposit to be made hereunder shall be reduced by
          the amount of moneys in the Bond Fund available on the maturity
          date for the payment of the principal of the Bonds.

               Section 2.13.  Applicability of Book-Entry Provisions. 
          Anything in this Indenture to the contrary notwithstanding, (a)
          the provisions of the Blanket Issuer Letter of Representations,
          dated February 26, 1996, between the Authority and The Depository
          Trust Company relating to the manner of and procedures for
          payment and redemption of Bonds and related matters shall apply
          so long as such Depositary shall be the Owner of all Outstanding
          Bonds and (b) the Authority, the Trustee or the Paying Agent, as
          applicable, may enter into a similar agreement, on terms
          satisfactory to the Company, with any subsequent Depositary and
          the provisions thereof shall apply so long as such Depositary
          shall be the Owner of all Outstanding Bonds.


                                     ARTICLE III

                                 REDEMPTION OF BONDS

               Section 3.01.  Redemption Provisions.  (a)  The Bonds shall
          be subject to redemption by the Authority, at the direction of
          the Company, on any date on or after September 1, 2002 in whole
          at any time or in part from time to time, at the applicable
          redemption price (expressed as a percentage of principal amount)
          set forth below, plus accrued interest to the redemption date:

                  Redemption Period                 Redemption Price
                  -----------------                 ----------------

          September 1, 2002 through August 31, 2003        102%
          September 1, 2003 through August 31, 2004        101%
          September 1, 2004 and thereafter                 100%

               (b) The Bonds shall be subject to redemption by the
          Authority, at the direction of the Company, in whole at any time
          at the principal amount thereof plus accrued interest to the
          redemption date, if:

                    (i)  the Company shall have determined that the
               continued operation of the Facilities is impracticable,
               uneconomical or undesirable for any reason;

                    (ii)  all or substantially all of the Facilities shall
               have been condemned or taken by eminent domain; or

                    (iii)  the operation of the Facilities shall have been
               enjoined or shall have otherwise been prohibited by, or
               shall conflict with, any order, decree, rule or regulation
               of any court or of any federal, state or local regulatory
               body, administrative agency or other governmental body.

               (c)  The Bonds shall be subject to mandatory redemption by
          the Authority, at the principal amount thereof plus accrued
          interest to the redemption date, on the 180th day (or such
          earlier date as may be designated by the Company) after a final
          determination by a court of competent jurisdiction or an
          administrative agency, to the effect that, as a result of a
          failure by the Company to perform or observe any covenant,
          agreement or representation contained in the Loan Agreement, the
          interest payable on the Bonds is included for federal income tax
          purposes in the gross income of the owners thereof, other than
          any owner of a Bond who is a "substantial user" of the Facilities
          or a "related person" within the meaning of Section 103(b)(13) of
          the 1954 Code.  No determination by any court or administrative
          agency shall be considered final for the purposes of this Section
          3.01 (c) unless the Company shall have been given timely notice
          of the proceeding which resulted in such determination and an
          opportunity to participate in such proceeding, either directly or
          through an owner of a Bond, and until the conclusion of any
          appellate review sought by any party to such proceeding or the
          expiration of the time for seeking such review. The Bonds shall
          be redeemed either in whole or in part in such principal amount
          that, in the opinion of Bond Counsel, the interest payable on the
          Bonds, including the Bonds remaining outstanding after such
          redemption, would not be included in the gross income of any
          owner thereof, other than an owner of a Bond who is a
          "substantial user" of the Facilities or a "related person" within
          the meaning of Section 103(b)(13) of the 1954 Code.

               Section 3.02.  Selection of Bonds to be Redeemed.  If less
          than all the Bonds shall be called for redemption under any
          provision of this Indenture permitting such partial redemption,
          the particular Bonds or portions of Bonds to be redeemed shall be
          selected by the Trustee, in such manner as the Trustee in its
          discretion may deem proper, in the aggregate principal amount
          designated to the Trustee by the Company or otherwise as required
          by this Indenture; provided, however, that if, as indicated in a
          certificate of an Authorized Company Representative delivered to
          the Trustee, the Company shall have offered to purchase all Bonds
          then Outstanding and less than all such Bonds have been tendered
          to the Company for such purchase, the Trustee, at the direction
          of an Authorized Company Representative, shall select for
          redemption all such Bonds which shall not have been so tendered;
          and provided, further, that the portion of any Bond to be
          redeemed shall be in the principal amount of $5,000 or some
          integral multiple thereof and that, in selecting Bonds for
          redemption, the Trustee shall treat each Bond as representing
          that number of Bonds which is obtained by dividing the principal
          amount of such Bond by $5,000.  If it is determined that one or
          more, but not all, of the $5,000 units of principal amount
          represented by any such Bond is to be called for redemption,
          then, upon notice of intention to redeem such $5,000 unit or
          units, the Owner of such Bond shall forthwith surrender such Bond
          to the Paying Agent or any Co-Paying Agent for (y) payment to
          such Owner of the redemption price (including the redemption
          premium, if any, and accrued interest to the date fixed for
          redemption) of the $5,000 unit or units of principal amount
          called for redemption and (z) delivery to such Owner of a new
          Bond or Bonds in the aggregate principal amount of the unredeemed
          balance of the principal amount of any such Bond.  Bonds
          representing the unredeemed balance of the principal amount of
          any such Bond shall be delivered to the Owner thereof, without
          charge therefor.  If the Owner of any such Bond of a denomination
          greater than $5,000 shall fail to present such Bond to the Paying
          Agent or any Co-Paying Agent for payment and exchange as
          aforesaid, such Bond shall, nevertheless, become due and payable
          on the date fixed for redemption to the extent of the $5,000 unit
          or units of principal amount called for redemption (and to that
          extent only).

               Section 3.03.  Procedure for Redemption.  (a) In the event
          any of the Bonds are called for redemption, the Trustee shall
          give notice, in the name of the Authority, of the redemption of
          such Bonds, which notice shall (i) specify the Bonds to be
          redeemed, the redemption date, the redemption price, and the
          place or places where amounts due upon such redemption will be
          payable (which shall be the Principal Office of the Paying Agent
          or any Co-Paying Agent) and, if less than all of the Bonds are to
          be redeemed, the numbers of the Bonds to be redeemed, and the
          portion of the principal amount of any Bond to be redeemed in
          part, (ii) state any condition to such redemption and (iii) state
          that on the redemption date, and upon the satisfaction of any
          such condition, the Bonds or portions thereof to be redeemed
          shall cease to bear interest.  Such notice may set forth any
          additional information relating to such redemption.  Such notice
          shall be given by Mail at least thirty (30) days prior to the
          date fixed for redemption to the Owners of the Bonds to be
          redeemed; provided, however, that failure duly to give such
          Notice by Mail, or any defect therein, shall not affect the
          validity of any proceedings for the redemption of Bonds as to
          which there shall have been no such failure or defect.  If a
          notice of redemption shall be unconditional, or if the conditions
          of a conditional notice or redemption shall have been satisfied,
          then upon presentation and surrender of Bonds so called for
          redemption at the place or places of payment, such Bonds shall be
          redeemed.  The Trustee shall promptly deliver to the Company a
          copy of each such notice of redemption.

               (b) With respect to any notice of redemption of Bonds in
          accordance with subsection (a) or (b) of Section 3.01 hereof,
          unless, upon the giving of such notice, such Bonds shall be
          deemed to have been paid within the meaning of Article VIII
          hereof, such notice shall state that such redemption shall be
          conditional upon the receipt, by the Trustee at or prior to the
          opening of business on the date fixed for such redemption, of
          moneys sufficient to pay the principal of and premium, if any,
          and interest on such Bonds to be redeemed, and that if such
          moneys shall not have been so received said notice shall be of no
          force and effect and the Authority shall not be required to
          redeem such Bonds.  In the event that such notice of redemption
          contains such a condition and such moneys are not so received,
          the redemption shall not be made and the Trustee shall within a
          reasonable time thereafter give notice, in the manner in which
          the notice of redemption was given, that such moneys were not so
          received.

               (c)  Any Bonds and portions of Bonds which have been duly
          selected for redemption shall cease to bear interest on the
          specified redemption date provided that moneys sufficient to pay
          the principal of, premium, if any, and interest on such Bonds
          shall be on deposit with the Trustee on the date fixed for
          redemption so that such Bonds will be deemed to be paid in
          accordance with Article VIII hereof.

               Section 3.04.  Payment of Redemption Price.  For the
          redemption of any of the Bonds, the Authority shall cause to be
          deposited in the Bond Fund, on the redemption date, solely out of
          the Receipts and Revenues of the Authority from the Loan
          Agreement, an amount sufficient to pay the principal of and
          premium, if any, and interest to become due on such redemption
          date.  The obligation of the Authority to cause any such deposit
          to be made hereunder shall be reduced by the amount of moneys in
          the Bond Fund available on such redemption date for payment of
          the principal of and premium, if any, and accrued interest on the
          Bonds to be redeemed.

               Section 3.05.  No Partial Redemption After Default. 
          Anything in this Indenture to the contrary notwithstanding, if
          there shall have occurred and be continuing an Event of Default
          defined in clause (a) or (b) of the first paragraph of Section
          9.01 hereof, there shall be no redemption of less than all of the
          Bonds at the time Outstanding other than a partial redemption in
          connection with an offer by the Company to purchase all Bonds
          Outstanding as contemplated in the first proviso to the first
          sentence of Section 3.02 hereof.


                                      ARTICLE IV

                                    THE BOND FUND

               Section 4.01.  Creation of Bond Fund.  There is hereby
          created and established with the Trustee a trust fund in the name
          of the Authority to be designated "The Industrial Development
          Authority of The County of Pima Industrial Development Revenue
          Bonds, 1997 Series C (Tucson Electric Power Company Project) Bond
          Fund".  The Trustee shall establish and maintain within the Bond
          Fund such segregated subaccounts as may be requested by an
          Authorized Company Representative.  The Bond Fund, and all moneys
          and certificated securities therein, shall be kept in the
          possession of the Trustee.

               Section 4.02.  Liens.  The Authority shall not create any
          lien upon the Bond Fund or upon the Receipts and Revenues of the
          Authority from the Loan Agreement other than the lien hereby
          created.

               Section 4.03.  Deposits into Bond Fund.  (a) There shall be
          deposited into the Bond Fund:

                    (i) the accrued interest, if any, on the Bonds accrued
               to the date of delivery thereof and paid by the initial
               purchasers thereof;

                    (ii) all Loan Payments; and

                    (iii) all other moneys received by the Trustee under
               and pursuant to any provision of the Loan Agreement, other
               than Sections 5.03, 5.04 and 8.05 thereof, or from any other
               source when accompanied by directions by the Company that
               such moneys are to be paid into the Bond Fund.

               (b) All income or other gain from the investment of moneys
          in the Bond Fund shall be deposited into the Bond Fund.

               Section 4.04.  Use of Moneys in Bond Fund.  Moneys, if any,
          paid into the Bond Fund pursuant to clause (i) of Section 4.03(a)
          hereof shall be applied to the payment of interest on the Bonds. 
          Except as otherwise provided in Sections 4.06, 9.01 and 10.04
          hereof, all other moneys in the Bond Fund constituting part of
          the Trust Estate 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 and payable at maturity, upon
          redemption or otherwise.

               Section 4.05.  Custody of Bond Fund; Withdrawal of Moneys. 
          The Bond Fund shall be in the custody of the Trustee but in the
          name of the Authority and the Authority hereby authorizes and
          directs the Trustee to withdraw from the Bond Fund and furnish to
          the Paying Agent funds constituting part of the Trust Estate
          sufficient to pay the principal of and premium, if any, and
          interest on the Bonds as the same shall become due and payable,
          and to withdraw from the Bond Fund funds sufficient to pay any
          other amounts payable therefrom as the same shall become due and
          payable.

               Section 4.06.  Bonds Not Presented for Payment.  In the
          event any Bonds shall not be presented for payment when the
          principal thereof and premium, if any, thereon become due, either
          at maturity or at the date fixed for redemption thereof or
          otherwise, if moneys sufficient to pay such Bonds are held by the
          Paying Agent or any Co-Paying Agent for the benefit of the Owners
          thereof, the Paying Agent shall segregate and hold such moneys in
          trust, without liability for interest thereon, for the benefit of
          the Owners of such Bonds, who shall, except as provided in the
          following paragraph, thereafter be restricted exclusively to such
          fund or funds for the satisfaction of any claim of whatever
          nature on their part under this Indenture or relating to said
          Bonds.

               Any moneys which the Paying Agent shall segregate and hold
          in trust for the payment of the principal of and premium, if any,
          or interest on any Bond and remaining unclaimed for one year
          after such principal, premium, if any, or interest has become due
          and payable shall, upon the Company's written request to the
          Paying Agent, be paid to the Company, with notice to the Trustee
          of such action; provided, however, that before the Paying Agent
          shall be required to make any such repayment, the Paying Agent
          shall, at the expense of the Company cause notice to be given
          once by Publication to the effect that such money remains
          unclaimed and that, after a date specified therein, which shall
          not be less than thirty (30) days from the date of such notice by
          Publication, any unclaimed balance of such moneys then remaining
          will be paid to the Company.  After the payment of such unclaimed
          moneys to the Company, the Owner of such Bond shall thereafter
          look only to the Company for the payment thereof, and all
          liability of the Authority, the Trustee and the Paying Agent with
          respect to such moneys shall thereupon cease.

               Section 4.07.  Moneys Held in Trust.  All moneys and
          Investment Securities held by the Trustee in the Bond Fund, and
          all moneys required to be deposited with or paid to the Trustee
          for deposit into the Bond Fund, and all moneys withdrawn from the
          Bond Fund and held by the Trustee, the Paying Agent, any
          Co-Paying Agent, shall be held by the Trustee, the Paying Agent
          or any Co-Paying Agent, as the case may be, in trust, and such
          moneys and Investment Securities (other than moneys held pursuant
          to Section 4.06 hereof and moneys or Investment Securities held
          in the Rebate Fund established in furtherance of the obligations
          of the Company under clause (b) of Section 6.04 of the Loan
          Agreement), while so held or so required to be deposited or paid,
          shall constitute part of the Trust Estate and be subject to the
          lien and security interest created hereby in favor of the
          Trustee, for the benefit of the Owners from time to time of the
          Bonds.  The Company shall have no right, title or interest in the
          Bond Fund, except such rights as may arise after the right, title
          and interest of the Trustee in and to the Trust Estate and all
          covenants, agreements and other obligations of the Authority
          under this Indenture shall have ceased, terminated and become
          void and shall have been satisfied and discharged in accordance
          with Article VIII hereof.

                                      ARTICLE V

                               DISPOSITION OF PROCEEDS

               Section 5.01.  Disposition of Proceeds.  The proceeds from
          the issuance and sale of the Bonds shall be applied as provided
          in Section 4.03 of the Loan Agreement.


                                      ARTICLE VI

                                     INVESTMENTS

               Section 6.01.  Investments.  The moneys in the Bond Fund
          shall, at the direction of the Company, be invested and
          reinvested in Investment Securities.  Any Investment Securities
          may be purchased subject to options or other rights in third
          parties to acquire the same.  Subject to the further provisions
          of this Section 6.01, such investments shall be made by the
          Trustee as directed and designated by the Company in a
          certificate of, or telephonic advice promptly confirmed by a
          certificate of, an Authorized Company Representative.  As and
          when any amounts thus invested may be needed for disbursements
          from the Bond Fund, the Trustee shall request the Company to
          designate such investments to be sold or otherwise converted into
          cash to the credit of the Bond Fund as shall be sufficient to
          meet such disbursement requirements and shall then follow any
          directions in respect thereto of an Authorized Company
          Representative.  As long as no Event of Default (as defined in
          Section 9.01 hereof) shall have occurred and be continuing, the
          Company shall have the right to designate the investments to be
          sold and to otherwise direct the Trustee in the sale or
          conversion to cash of the investments made with the moneys in the
          Bond Fund, provided that the Trustee shall be entitled to
          conclusively assume the absence of any such Event of Default
          unless it has notice thereof within the meaning of Section 10.05
          hereof.


                                     ARTICLE VII

                                  GENERAL COVENANTS

               Section 7.01.  No General Obligations.  Each and every
          covenant herein made, including all covenants made in the various
          sections of this Article VII, is predicated upon the condition
          that neither Pima County, Arizona nor the State of Arizona shall
          in any event be liable for the payment of the principal of, or
          premium, if any, or interest on the Bonds or for the performance
          of any pledge, mortgage, obligation or agreement created by or
          arising out of this Indenture or the issuance of the Bonds, and
          further that neither the Bonds, nor the premium, if any, or
          interest thereon, nor any such obligation or agreement of the
          Authority shall be construed to constitute an indebtedness of
          Pima County, Arizona or the State of Arizona within the meaning
          of any constitutional or statutory provisions whatsoever.  The
          Bonds and the interest and premium, if any, thereon shall be
          limited obligations of the Authority payable solely from the
          Receipts and Revenues of the Authority from the Loan Agreement
          and the other moneys pledged therefor.

               The Authority shall promptly cause to be paid, solely from
          the sources stated herein, the principal of and premium, if any,
          and interest on every Bond issued under this Indenture at the
          place, on the dates and in the manner provided herein and in said
          Bonds according to the true intent and meaning thereof.

               Section 7.02.  Performance of Covenants of the Authority;
          Representations.  The Authority shall faithfully perform at all
          times any and all covenants, undertakings, stipulations and
          provisions contained in this Indenture, in any and every Bond
          executed, authenticated and delivered hereunder, and in all
          proceedings pertaining thereto.  The Authority represents that it
          is duly authorized under the Constitution and laws of the State
          of Arizona to issue the Bonds authorized hereby, to enter into
          the Loan Agreement and this Indenture, and to pledge and assign
          to the Trustee the Trust Estate, and that the Bonds in the hands
          of the Owners thereof are and will be valid and binding limited
          obligations of the Authority.

               Section 7.03.  Maintenance of Rights and Powers; Compliance
          with Laws.  The Authority shall at all times use its best efforts
          to maintain its corporate existence or assure the assumption of
          its obligations under this Indenture by any public body
          succeeding to its powers under the Act; and it shall at all times
          use its best efforts to comply with all valid acts, rules,
          regulations, orders and directions of any legislative, executive,
          administrative or judicial body known to it to be applicable to
          the Loan Agreement and this Indenture.

               Section 7.04.  Enforcement of Obligations of the Company;
          Amendments.  Upon receipt of written notification from the
          Trustee, the Authority shall cooperate with the Trustee in
          enforcing the obligation of the Company to pay or cause to be
          paid all the payments and other costs and charges payable by the
          Company under the Loan Agreement.  The Authority shall not enter
          into any agreement with the Company amending the Loan Agreement
          without the prior written consent of the Trustee and compliance
          with Sections 12.06 and 12.07 of this Indenture (a revision to
          Exhibit A to the Loan Agreement not being deemed an amendment for
          purposes of this Section).

               Section 7.05.  Further Instruments.  The Authority shall,
          upon the reasonable request of the Trustee, from time to time
          execute and deliver such further instruments and take such
          further action as may be reasonable and as may be required to
          carry out the purposes of this Indenture; provided, however, that
          no such instruments or actions shall pledge the credit or taxing
          power of the State of Arizona, Pima County, the Authority or any
          other political subdivision of said State.

               Section 7.06.  No Disposition of Trust Estate.  Except as
          permitted by this Indenture, the Authority shall not sell, lease,
          pledge, assign or otherwise dispose of or encumber its interest
          in the Trust Estate and will promptly pay or cause to be
          discharged or make adequate provision to discharge any lien or
          charge on any part thereof not permitted hereby.

               Section 7.07.  Financing Statements.  The Authority and the
          Trustee shall cooperate with the Company in causing appropriate
          financing statements naming, the Trustee as pledgee of the
          Receipts and Revenues of the Authority from the Loan Agreement
          and of the other moneys pledged under the Indenture for the
          payment of the principal of and premium, if any, and interest on
          the Bonds, and as pledgee and assignee of the balance of the
          Trust Estate, and the Authority shall cooperate with the Trustee
          and the Company in causing appropriate continuation statements to
          be duly filed and recorded in the appropriate state and county
          offices as required by the provisions of the Uniform Commercial
          Code or other similar law as adopted in the State of Arizona and
          any other applicable jurisdiction, as from time to time amended,
          in order to perfect and maintain the security interests created
          by this Indenture.

               Section 7.08.  Tax Covenants; Rebate Fund.  (a)  The
          Authority covenants for the benefit of all Owners from time to
          time of the Bonds that it will not directly or indirectly use or
          (to the extent within its control), permit the use of, the
          proceeds of any of the Bonds or any other funds of the Authority,
          or take or omit to take any other action, if and to the extent
          that such use, or the taking or omission to take such action,
          would cause any of the Bonds to be "arbitrage bonds" within the
          meaning of Section 148 of the Code or otherwise subject to
          federal income taxation by reason of Sections 103 and 141 through
          150 of the Code or Section 103 of the 1954 Code, as applicable,
          and any applicable regulations promulgated thereunder.  To that
          end the Authority covenants to comply with all covenants set
          forth in the Tax Agreement, which is hereby incorporated herein
          by reference as though fully set forth herein.

               (b)  The Trustee shall establish and maintain a fund
          separate from any other fund established and maintained hereunder
          designated "The Industrial Development Authority of the County of
          Pima Industrial Development Revenue Bonds, 1997 Series C (Tucson
          Electric Power Company Project) Rebate Fund" (herein called the
          "Rebate Fund") in accordance with the provisions of the Tax
          Agreement.  Within the Rebate Fund, the Trustee shall maintain
          such accounts as shall be directed by the Company in order for
          the Authority and the Company to comply with the provisions of
          the Tax Agreement.  Subject to the transfer provisions provided
          in paragraph (c) below, 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 Requirement (as defined in the Tax
          Agreement), for payment to the United States of America, and
          neither the Company, the Authority or the Owners shall have any
          rights in or claim to such moneys.  All amounts deposited into or
          on deposit in the Rebate Fund shall be governed by this Section
          7.08, by Section 6.04 of the Loan Agreement and by the Tax
          Agreement.  The Trustee shall conclusively be deemed to have
          complied with such provisions if it follows the directions of the
          Company, including supplying all necessary information in the
          manner set forth in the Tax Agreement, and shall not be required
          to take any actions thereunder in the absence of written
          directions from the Company.

               (c)  Upon receipt of the Company's written instructions, the
          Trustee shall remit part or all of the balances in the Rebate
          Fund to the United States of America, as so directed.  In
          addition, if the Company so directs, the Trustee shall deposit
          moneys into or transfer moneys out of the Rebate Fund from or
          into such accounts or funds as directed by the Company's written
          directions.  Any funds remaining in the Rebate Fund after all of
          the Bonds shall have been paid and any Rebate Requirement shall
          have been satisfied, or provision therefor reasonably
          satisfactory to the Trustee shall have been made, shall be
          withdrawn and remitted to the Company.

               (d)  Notwithstanding any provision of this Indenture, the
          obligation to remit the Rebate Requirement to the United States
          of America and to comply with all other requirements of this
          Section 7.08, Section 6.04 of the Loan Agreement and the Tax
          Agreement shall survive the payment of the Bonds and the
          satisfaction and discharge of this Indenture.

               Section 7.09.  Notices of Trustee.  The Trustee shall give
          notice to both the Authority and the Company whenever it is
          required hereby to give notice to either and, additionally, shall
          furnish to the Authority and the Company copies of any Notice by
          Mail or Publication given by it pursuant to any provision hereof.


                                     ARTICLE VIII

                                      DEFEASANCE

               Section 8.01.  Defeasance.  If the Authority shall pay or
          cause to be paid to the Owner of any Bond secured hereby the
          principal of and premium, if any, and interest due and payable,
          and thereafter to become due and payable, upon such Bond or any
          portion of such Bond in the principal amount of $5,000 or any
          integral multiple thereof, such Bond or portion thereof shall
          cease to be entitled to any lien, benefit or security under this
          Indenture.  If the Authority shall pay or cause to be paid to the
          Owners of all the Bonds secured hereby the principal of and
          premium, if any, and interest due and payable, and thereafter to
          become due and payable, thereon, and shall pay or cause to be
          paid all other sums payable hereunder including, without
          limitation, amounts payable pursuant to Section 10.04 hereof,
          then, and in that case, the right, title and interest of the
          Trustee in and to the Trust Estate shall thereupon cease,
          terminate and become void.  In such event, the Trustee shall
          assign, transfer and turn over to the Company the Trust Estate,
          including, without limitation, any surplus in the Bond Fund and
          any balance remaining in any other fund created under this
          Indenture.

               All or any portion of Outstanding Bonds or portions of Bonds
          in principal amounts of $5,000 or any integral multiple thereof,
          shall prior to the maturity or redemption date thereof be deemed
          to have been paid within the meaning and with the effect
          expressed in this Article VIII, and the entire indebtedness of
          the Authority with respect thereof shall be satisfied and
          discharged, when

                    (a) in the event said Bonds or portions thereof have
               been selected for redemption in accordance with Section 3.02
               hereof, the Trustee shall have given, or the Company shall
               have given to the Trustee in form satisfactory to it
               irrevocable instructions to give, on a date in accordance
               with the provisions of Section 3.03 hereof, notice of
               redemption of such Bonds or portions thereof,

                    (b) there shall have been deposited with the Trustee
               either moneys in an amount which shall be sufficient, or
               Government Obligations which shall not contain provisions
               permitting the redemption thereof at the option of the
               issuer, the principal of and the interest on which, when
               due, and without regard to any reinvestment thereof, will
               provide moneys which, together with the moneys, if any,
               deposited with or held by the Trustee, shall be sufficient,
               to pay when due the principal of and premium, if any, and
               interest due and to become due on said Bonds or portions
               thereof on and prior to the redemption date or maturity date
               thereof, as the case may be, and

                    (c) in the event said Bonds or portions thereof do not
               mature and are not to be redeemed within the next succeeding
               sixty (60) days, the Company shall have given the Trustee in
               form satisfactory to it irrevocable instructions to give, as
               soon as practicable in the same manner as a notice of
               redemption is given pursuant to Section 3.03 hereof, a
               notice to the Owners of said Bonds or portions thereof that
               the deposit required by clause (b) above has been made with
               the Trustee and that said Bonds or portions thereof are
               deemed to have been paid in accordance with this Article
               VIII and stating the maturity or redemption date upon which
               moneys are to be available for the payment of the principal
               of and premium, if any, and interest on said Bonds or
               portions thereof.

               Neither the Government Obligations nor moneys deposited with
          the Trustee pursuant to this Article VIII nor principal or
          interest payments on any such Government Obligations shall be
          withdrawn or used for any purpose other than, and such Government
          Obligations, moneys and principal or interest payments shall be
          held in trust for, the payment of the principal of and premium,
          if any, and interest on said Bonds or portions thereof; provided,
          that any cash received from such principal or interest payments
          on such Government Obligations deposited with the Trustee, if not
          then needed for such purposes, shall, to the extent practicable,
          be invested in Government Obligations of the type described in
          clause (b) of the preceding paragraph maturing at times and in
          amounts sufficient to pay when due the principal of and premium,
          if any, and interest to become due on said Bonds or portions
          thereof on and prior to such redemption date or maturity date
          thereof, as the case may be, and interest earned from such
          reinvestments shall be paid over to the Company, as received by
          the Trustee, free and clear of any trust, lien or pledge
          hereunder.  If payment of less than all the Bonds is to be
          provided for in the manner and with the effect provided in this
          Article VIII, the Trustee shall select such Bonds or portions of
          Bonds in the manner specified by Section 3.02 hereof for
          selection for redemption of less than all Bonds in the principal
          amount designated to the Trustee by the Company.  At or prior to
          the time of the deposit of any Government Obligations with the
          Trustee pursuant to this Section 8.01, the Company shall provide
          the Trustee with a certificate of an accountant or an accounting
          firm as to the sufficiency of such Government Obligations to pay
          when due the principal of and premium, if any, and interest due
          and to become due as set forth in clause (b) of the preceding
          paragraph.


                                      ARTICLE IX

                                DEFAULTS AND REMEDIES

               Section 9.01.  Events of Default.  Each of the following
          events shall constitute and is referred to in this Indenture as
          an "Event of Default":

                    (a) a failure to pay the principal of or premium, if
               any, on any of the Bonds when the same shall become due and
               payable at maturity, upon redemption or otherwise;

                    (b) a failure to pay an installment of interest on any
               of the Bonds after such interest shall have become due and
               payable for a period of thirty (30) days;

                    (c) a failure by the Authority to observe and perform
               any covenant, condition, agreement or provision (other than
               as specified in clauses (a) and (b) of this Section 9.01)
               contained in the Bonds or in this Indenture on the part of
               the Authority to be observed or performed, which failure
               shall continue for a period of sixty (60) days after written
               notice, specifying such failure and requesting that it be
               remedied, shall have been given to the Authority and the
               Company by the Trustee, which may give such notice in its
               discretion and which shall give such notice at the written
               request of Owners of not less than 33% in principal amount
               of the Bonds then Outstanding, unless the Trustee, or the
               Trustee and Owners of a principal amount of Bonds not less
               than the principal amount of Bonds the Owners of which
               requested that such notice be given, as the case may be,
               shall agree in writing to an extension of such period prior
               to its expiration; provided, however, that the Trustee, or
               the Trustee and the Owners of such principal amount of
               Bonds, as the case may be, shall be deemed to have agreed to
               an extension of such period if corrective action is
               initiated by the Authority, or the Company on behalf of the
               Authority, within such period and is being diligently
               pursued.

               Upon the occurrence and continuance of any Event of Default
          described in clause (a) or (b) of the preceding paragraph, the
          Trustee may, and at the written request of Owners of not less
          than 33% in principal amount of Bonds then Outstanding shall, by
          written notice to the Authority and the Company, declare the
          Bonds to be immediately due and payable, whereupon they shall,
          without further action, become and be immediately due and
          payable, anything in this Indenture or in the Bonds to the
          contrary notwithstanding, and the Trustee shall give notice
          thereof by Mail to all Owners of Outstanding Bonds.

               The provisions of the preceding paragraph, however, are
          subject to the condition that if, after the principal of the
          Bonds shall have been so declared to be 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, the
          Authority shall cause to be deposited with the Trustee a sum
          sufficient to pay all matured installments of interest upon all
          Bonds and the principal of any and all Bonds which shall have
          become due otherwise than by reason of such declaration (with
          interest upon such principal and, to the extent permissible by
          law, on overdue installments of interest, at the rate per annum
          borne by the Bonds) and such amounts as shall be sufficient to
          cover reasonable compensation and reimbursement of expenses
          payable to the Trustee and any predecessor Trustee, and all
          Events of Default hereunder other than nonpayment of the
          principal of Bonds which shall have become due by said
          declaration shall have been remedied, then, in every such case,
          such Event of Default shall be deemed waived and such declaration
          and its consequences rescinded and annulled, and the Trustee
          shall promptly give written notice of such waiver, rescission and
          annulment to the Authority and the Company, and, if notice of the
          acceleration of the Bonds shall have been given to the Owners of
          the Bonds, shall give notice thereof by Mail to all Owners of
          Outstanding Bonds; but no such waiver, rescission and annulment
          shall extend to or affect any subsequent Event of Default or
          impair any right or remedy consequent thereon.

               Section 9.02.  Remedies.  Upon the occurrence and
          continuance of any Event of Default, then and in every such case
          the Trustee in its discretion may, and upon the written request
          of Owners of not less than a majority in principal amount of the
          Bonds then Outstanding and receipt of indemnity to its
          satisfaction shall, in its own name and as the Trustee of an
          express trust:

                    (a) by mandamus, or other suit, action or proceeding at
               law or in equity, enforce all rights of the Owners of the
               Bonds, and require the Authority or the Company to carry out
               any agreements with or for the benefit of such Owners and to
               perform its or their duties under the Act, the Loan
               Agreement and this Indenture;

                    (b) bring suit upon the Bonds; or

                    (c) by action or suit in equity enjoin any acts or
               things which may be unlawful or in violation of the rights
               of the Owners of the Bonds.

               Section 9.03.  Restoration to Former Position.  In the event
          that any proceeding taken by the Trustee to enforce any right
          under this Indenture shall have been discontinued or abandoned
          for any reason, or shall have been determined adversely to the
          Trustee, then the Authority, the Trustee and the Owners shall be
          restored, subject to any determination in such proceeding, to
          their former positions and rights hereunder, respectively, and
          all rights, remedies and powers of the Trustee shall continue as
          though no such proceeding had been taken.

               Section 9.04.  Owners' Right to Direct Proceedings. 
          Anything in this Indenture to the contrary notwithstanding, the
          Owners of a majority in principal amount of the Bonds then
          Outstanding hereunder shall have the right, by an instrument in
          writing executed and delivered to the Trustee, to direct the
          time, method and place of conducting all remedial proceedings
          available to the Trustee under this Indenture or exercising any
          trust or power conferred on the Trustee by this Indenture;
          provided, however, that such direction shall not be otherwise
          than in accordance with law and the provisions of this Indenture
          and that the Trustee shall have the right (but not the
          obligation) to decline to follow any such direction if the
          Trustee, being advised by counsel, shall determine that the
          action or proceeding so directed may not lawfully be taken, or if
          the Trustee in good faith shall determine that the action or
          proceedings so directed would involve the Trustee in personal
          liability or if the Trustee in good faith shall so determine that
          the actions or forbearances specified in or pursuant to such
          direction would be unduly prejudicial to the interests of Owners
          not joining in the giving of said direction, it being understood
          that the Trustee shall have no duty to ascertain whether or not
          such actions or forbearances are unduly prejudicial to such
          Owners.

               Section 9.05.  Limitation on Owners' Right to Institute
          Proceedings.  No Owner of Bonds shall have any right to institute
          any suit, action or proceeding in equity or at law for the
          execution of any trust or power hereunder, or any other remedy
          hereunder or on said Bonds, unless such Owner previously shall
          have given to the Trustee written notice of an Event of Default
          as hereinabove provided and unless the Owners of not less than a
          majority in principal amount of the Bonds then Outstanding shall
          have made written request of the Trustee so to do, after the
          right to institute said suit, action or proceeding shall have
          accrued, and shall have afforded the Trustee a reasonable
          opportunity to proceed to institute the same in either its or
          their name, and unless there also shall have been offered to the
          Trustee security and indemnity satisfactory to it against the
          costs, expenses and liabilities to be incurred therein or
          thereby, and the Trustee shall not have complied with such
          request within a reasonable time; and such notification, request
          and offer of indemnity are hereby declared in every such case, at
          the option of the Trustee, to be conditions precedent to the
          institution of said suit, action or proceeding; it being
          understood and intended that no one or more of the Owners of the
          Bonds shall have any right in any manner whatever by his or their
          action to affect, disturb or prejudice the security of this
          Indenture, or to enforce any right hereunder or under the Bonds,
          except in the manner herein provided, and that all suits, actions
          and proceedings at law or in equity shall be instituted, had and
          maintained in the manner herein provided and for the equal
          benefit of all Owners of the Bonds.

               Section 9.06.  No Impairment of Right to Enforce Payment. 
          Notwithstanding any other provision in this Indenture, the right
          of any Owner of a Bond to receive payment of the principal of and
          premium, if any, and interest on such Bond, on or after the
          respective due dates expressed therein, 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 Owner.

               Section 9.07.  Proceedings by Trustee without Possession of
          Bonds.  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 on the trial or other proceedings relative
          thereto, and any such suit, action or proceeding instituted by
          the Trustee shall be brought in its name for the equal and
          ratable benefit of the Owners of the Bonds, subject to the
          provisions of this Indenture.

               Section 9.08.  No Remedy Exclusive.  No remedy herein
          conferred upon or reserved to the Trustee or to the Owners of the
          Bonds is intended to be exclusive of any other remedy or
          remedies, and each and every such remedy shall be cumulative, and
          shall be in addition to every other remedy given hereunder or
          under the Loan Agreement, now or hereafter existing at law or in
          equity or by statute.

               Section 9.09.  No Waiver of Remedies.  No delay or omission
          of the Trustee or of any Owner of a Bond 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 of any such default,
          or an acquiescence therein; and every power and remedy given by
          this Article IX to the Trustee and to the Owners of the Bonds,
          respectively, may be exercised from time to time and as often as
          may be deemed expedient.

               Section 9.10.  Application of Moneys.  Any moneys received
          by the Trustee, by any receiver or by any Owner of a Bond
          pursuant to any right given or action taken under the provisions
          of this Article IX, after payment of the costs and expenses of
          the proceedings resulting in the collection of such moneys and of
          all amounts due to the Trustee and any predecessor Trustee under
          Section 10.04 hereof, shall be deposited in the Bond Fund and all
          moneys so deposited in the Bond Fund during the continuance of an
          Event of Default (other than moneys for the payment of Bonds
          which had matured or otherwise become payable prior to such Event
          of Default or for the payment of interest due prior to such Event
          of Default) shall be applied as follows:

                    (a) Unless the principal of all the Bonds shall have
               become due and payable, all such moneys shall be applied (i)
               first, to the payment to the persons entitled thereto of all
               installments of interest then due on the Bonds, with
               interest on overdue installments, if lawful, at the rate per
               annum borne by the Bonds, in the order of maturity of the
               installments of such interest and, if the amount available
               shall not be sufficient to pay in full any particular
               installment of interest, then to the payment ratably,
               according to the amounts due on such installment, and (ii)
               second, to the payment to the persons entitled thereto of
               the unpaid principal of any of the Bonds which shall have
               become due (other than Bonds called for redemption for the
               payment of which money is held pursuant to the provisions of
               this Indenture), with interest on such Bonds at their rate
               from the respective dates upon which they became due and, if
               the amount available shall not be sufficient to pay in full
               Bonds due on any particular date, together with such
               interest, then to the payment ratably, according to the
               amount of principal and interest due on such date, in each
               case to the persons entitled thereto, without any
               discrimination or privilege.

                    (b) If the principal of all the Bonds shall have become
               due and payable, all such moneys shall be applied to the
               payment of the principal and interest then due and unpaid
               upon the Bonds, with interest on overdue interest and
               principal, as aforesaid, without preference or priority of
               principal over interest or of interest over principal, or of
               any installment of interest over any other installment of
               interest, or of any Bond over any other Bond, ratably,
               according to the amounts due respectively for principal and
               interest, to the persons entitled thereto without any
               discrimination or privilege.

                    (c) If the principal of all the Bonds shall have become
               due and payable, and if acceleration of the maturity of the
               Bonds by reason of such Event of Default shall thereafter
               have been rescinded and annulled under the provisions of
               this Article IX, then, subject to the provisions of clause
               (b) of this Section 9.10 which shall be applicable in the
               event that the principal of all the Bonds shall later become
               due and payable, the moneys shall be applied in accordance
               with the provisions of clause (a) of this Section 9.10.

               Section 9.11.  Severability of Remedies.  It is the purpose
          and intention of this Article IX to provide rights and remedies
          to the Trustee and the Owners which may be lawfully granted under
          the provisions of the Act, but should any right or remedy herein
          granted be held to be unlawful, the Trustee and the Owners shall
          be entitled, as above set forth, to every other right and remedy
          provided in this Indenture and by law.


                                      ARTICLE X

                TRUSTEE; PAYING AGENT AND CO-PAYING AGENTS; REGISTRAR

               Section 10.01.  Acceptance of Trusts.  The Trustee hereby
          accepts and agrees to execute the trusts hereby created, but only
          upon the additional terms set forth in this Article X, to all of
          which the Authority agrees and the respective Owners agree by
          their acceptance of delivery of any of the Bonds.

               Section 10.02.  No Responsibility for Recitals.  The
          recitals, statements and representations contained in this
          Indenture or in the Bonds, save only the Trustee's authentication
          upon the Bonds, are not made by the Trustee, and the Trustee does
          not assume, and shall not have, any responsibility or obligation
          for the correctness of any thereof.  The Trustee makes no
          representation as to the validity or sufficiency of this
          Indenture or the Bonds.

               Section 10.03.  Limitations on Liability.  The Trustee may
          execute any of the trusts or powers hereof and perform the duties
          required of it hereunder by or through attorneys, agents,
          receivers, or employees, and shall be entitled to advice of
          counsel concerning all matters of trust and its duty hereunder,
          and the Trustee shall not be answerable for the default or
          misconduct of any such attorney, agent, receiver, or employee
          selected by it with reasonable care.  The Trustee shall not be
          answerable for the exercise of any discretion or power under this
          Indenture or for anything whatsoever in connection with the trust
          created hereby, except only for its own negligence or bad faith.

               Anything in this Indenture to the contrary notwithstanding,
          the Trustee shall in no event be required to expend or risk its
          own funds or otherwise incur personal financial liability in the
          performance of any of its duties or in the exercise of any of its
          rights or powers, if there shall be reasonable grounds for
          believing that the repayment of such funds or adequate indemnity
          against such liability is not reasonably assured to it.

               Section 10.04.  Compensation, Expenses and Advances.  The
          Trustee, the Paying Agent and any Co-Paying Agent, and the
          Registrar under this Indenture shall be entitled to reasonable
          compensation for their services rendered hereunder (not limited
          by any provision of law regarding the compensation of the trustee
          of an express trust) and to reimbursement for their actual
          out-of-pocket expenses (including counsel fees) reasonably
          incurred in connection therewith except as a result of their
          negligence or bad faith, including, without limitation,
          compensation for any services rendered, and reimbursement for any
          expenses incurred, at and subsequent to the time the Bonds are
          deemed to have been paid in accordance with Article VIII hereof. 
          If the Authority shall fail to perform any of the covenants or
          agreements contained in this Indenture, other than the covenants
          or agreements in respect of the payment of the principal of and
          premium, if any, and interest on the Bonds, the Trustee may, in
          its uncontrolled discretion and without notice to the Owners of
          the Bonds, at any time and from time to time, make advances to
          effect performance of the same on behalf of the Authority, but
          the Trustee shall be under no obligation so to do; and any and
          all such advances may bear interest at a rate per annum not
          exceeding the base rate then in effect for 90-day commercial
          loans by the Trustee or a commercial banking affiliate of the
          Trustee designated as such by the Trustee in the city in which is
          located the Principal Office of the Trustee (or such affiliate,
          as the case may be) to borrowers of the highest credit standing;
          but no such advance shall operate to relieve the Authority from
          any default hereunder.  In Section 5.03 of the Loan Agreement,
          the Company has agreed that it will pay to the Trustee (including
          any predecessor Trustee), the Paying Agent and any Co-Paying
          Agent and the Registrar, such compensation and reimbursement of
          expenses and advances, but the Company may, without creating a
          default hereunder, contest in good faith the reasonableness of
          any such services, expenses and advances.  If the Company shall
          have failed to make any payment to the Trustee or any predecessor
          Trustee under Section 5.03 of the Loan Agreement and such failure
          shall have resulted in an Event of Default under the Loan
          Agreement, the Trustee, and any predecessor Trustee, shall have,
          in addition to any other rights hereunder, a claim, prior to the
          claim of the Owners, for the payment of its compensation and the
          reimbursement of its expenses and any advances made by it, as
          provided in this Section 10.04, upon the moneys and obligations
          in the Bond Fund; provided, however, that neither the Trustee nor
          any predecessor Trustee shall have any such claim upon moneys or
          obligations deposited with or paid to the Trustee for the
          redemption or payment of Bonds which are deemed to have been paid
          in accordance with Article VIII hereof.

               In Section 5.04 of the Loan Agreement, the Company has
          agreed to indemnify the Trustee and any predecessor Trustee to
          the extent provided therein.

               Section 10.05.  Notice of Events of Default.  The Trustee
          shall not be required to take notice, or be deemed to have
          notice, of any default or Event of Default under this Indenture
          other than an Event of Default under clause (a) or (b) of the
          first paragraph of Section 9.01 hereof, unless an officer
          assigned by the Trustee to administer its corporate trust
          business has been specifically notified in writing of such
          default or Event of Default by Owners of at least 33% in
          principal amount of the Bonds then Outstanding.  The Trustee may,
          however, at any time, in its discretion, require of the Authority
          and the Company full information and advice as to the performance
          of any of the covenants, conditions and agreements contained
          herein.

               Section 10.06.  Action by Trustee.  The Trustee shall be
          under no obligation to take any action in respect of any default
          or Event of Default hereunder or toward the execution or
          enforcement of any of the trusts hereby created, or to institute,
          appear in or defend any suit or other proceeding in connection
          therewith, unless requested in writing so to do by Owners of at
          least a majority in principal amount of the Bonds then
          Outstanding, and, if in its opinion such action may tend to
          involve it in expense or liability, unless furnished, from time
          to time as often as it may require, with security and indemnity
          satisfactory to it. The foregoing provisions are intended only
          for the protection of the Trustee, and shall not affect any
          discretion or power given by any provisions of this Indenture to
          the Trustee to take action in respect of any default or Event of
          Default without such notice or request from the Owners of the
          Bonds, or without such security or indemnity.

               Section 10.07.  Good Faith Reliance.  The Trustee shall be
          protected and shall incur no liability in acting or proceeding in
          good faith upon any resolution, notice, telegram, telex,
          facsimile transmission, request, consent, waiver, certificate,
          statement, affidavit, voucher, bond, requisition or other paper
          or document which it shall in good faith believe to be genuine
          and to have been passed or signed by the proper board, body or
          person or to have been prepared and furnished pursuant to any of
          the provisions of this Indenture or the Loan Agreement, or upon
          the written opinion of any attorney, engineer, accountant or
          other expert believed by the Trustee to be qualified in relation
          to the subject matter, and the Trustee shall be under no duty to
          make any investigation or inquiry as to any statements contained
          or matters referred to in any such instrument, but may accept and
          rely upon the same as conclusive evidence of the truth and
          accuracy of such statements.  Neither the Trustee, the Paying
          Agent, any Co-Paying Agent nor the Registrar shall be bound to
          recognize any person as an Owner of a Bond or to take any action
          at his request unless the ownership of such Bond is proved as
          contemplated in Section 11.01 hereof.

               Section 10.08.  Dealings in Bonds and with the Authority and
          the Company.  The Trustee, the Paying Agent, any Co-Paying Agent
          or the Registrar, in its individual or any other capacity, may in
          good faith buy, sell, own, hold and deal in any of the Bonds
          issued hereunder, and may join in any action which any Owner of a
          Bond may be entitled to take with like effect as if it did not
          act in any capacity hereunder.  The Trustee, the Paying Agent,
          any Co-Paying Agent or the Registrar, in its individual or any
          other capacity, either as principal or agent, may also engage in
          or be interested in any financial or other transaction with the
          Authority or the Company, and may act as depositary, trustee, or
          agent for any committee or body of Owners of Bonds secured hereby
          or other obligations of the Authority as freely as if it did not
          act in any capacity hereunder.

               Section 10.09.  Allowance of Interest.  The Trustee may, but
          shall not be obligated to, allow and credit interest upon any
          moneys which it may at any time receive under any of the
          provisions of this Indenture, at such rate, if any, as it
          customarily allows upon similar funds of similar size and under
          similar conditions.  All interest allowed on any such moneys
          shall be credited as provided in Article IV with respect to
          interest on investments.

               Section 10.10.  Construction of Indenture.  The Trustee may
          construe any of the provisions of this Indenture insofar as the
          same may appear to be ambiguous or inconsistent with any other
          provision hereof, and any construction of any such provisions
          hereof by the Trustee in good faith shall be binding upon the
          Owners of the Bonds.

               Section 10.11.  Resignation of Trustee.  The Trustee may
          resign and be discharged of the trusts created by this Indenture
          by executing an instrument in writing resigning such trust and
          specifying the date when such resignation shall take effect, and
          filing the same with the President of the Authority and with the
          Company, not less than forty-five (45) days before the date
          specified in such instrument when such resignation shall take
          effect, and by giving notice of such resignation by Mail to all
          Owners of Bonds.  Such resignation shall take effect on the later
          to occur of (i) the day specified in such instrument and notice,
          unless previously a successor Trustee shall have been appointed
          as hereinafter provided, in which event such resignation shall
          take effect immediately upon the appointment of such successor
          Trustee and (ii) the appointment of a successor Trustee.

               So long as no event which is, or after notice or lapse of
          time, or both, would become, an Event of Default shall have
          occurred and be continuing, if the Authority shall have delivered
          to the Trustee (i) an instrument appointing a successor Trustee,
          effective as of a date specified therein and (ii) an instrument
          of acceptance of such appointment, effective as of such date, by
          such successor Trustee in accordance with Section 10.16, the
          Trustee shall be deemed to have resigned as contemplated in this
          Section, the successor Trustee shall be deemed to have been
          appointed pursuant to subsection (b) of Section 10.13 and such
          appointment shall be deemed to have been accepted as contemplated
          in Section 10.16, all as of such date, and all other provisions
          of this Article X shall be applicable to such resignation,
          appointment and acceptance except to the extent inconsistent with
          this paragraph.  The Authority shall deliver any such instrument
          of appointment at the direction of the Company.

               Section 10.12.  Removal of Trustee.  The Trustee may be
          removed at any time by filing with the Trustee so removed, and
          with the Authority and the Company, an instrument or instruments
          in writing, appointing a successor, or an instrument or
          instruments in writing, consenting to the appointment by the
          Authority (at the direction of the Company) of a successor and
          accompanied by an instrument of appointment by the Authority (at
          the direction of the Company) of such successor, and in any event
          executed by Owners of not less than a majority in principal
          amount of the Bonds then Outstanding, such filing to be made by
          any Owner of a Bond or his duly authorized attorney.

               Section 10.13.  Appointment of Successor Trustee.  (a) In
          case at any time the Trustee shall be removed, or be dissolved,
          or if its property or affairs shall be taken under the control of
          any state or federal court or administrative body because of
          insolvency or bankruptcy, or for any other reason, then a vacancy
          shall forthwith and ipso facto exist and a successor may be
          appointed, and in case at any time the Trustee shall resign or be
          deemed to have resigned, then a successor may be appointed, by
          filing with the Authority and the Company an instrument in
          writing appointing such successor Trustee executed by Owners of
          not less than a majority in principal amount of Bonds then
          Outstanding.  Copies of such instrument shall be promptly
          delivered by the Authority to the predecessor Trustee, to the
          Trustee so appointed and the Company.

               (b)  Until a successor Trustee shall be appointed by the
          Owners of the Bonds as herein authorized, the Authority, shall
          appoint a successor Trustee as directed by the Company.  After
          any appointment by the Authority, it shall cause notice of such
          appointment to be given by Mail to all Owners of Bonds.  Any new
          Trustee so appointed by the Authority shall immediately and
          without further act be superseded by a Trustee appointed by the
          Owners of the Bonds in the manner above provided.

               (c)  No resignation or removal of the Trustee and no
          appointment of a successor Trustee pursuant to this Article shall
          become effective until the acceptance of appointment by the
          successor Trustee.

               Section 10.14.  Qualifications of Successor Trustee.  Every
          successor Trustee (a) shall be a bank or trust company duly
          organized under the laws of the United States or any state or
          territory thereof authorized by law to perform all the duties
          imposed upon it by this Indenture and (b) shall have (or the
          parent holding company of which shall have) a combined capital
          stock, surplus and undivided profits of at least $100,000,000 if
          there can be located, with reasonable effort, such an institution
          willing and able to accept the trust on reasonable and customary
          terms.

               Section 10.15.  Judicial Appointment of Successor Trustee. 
          In case at any time the Trustee shall resign and no appointment
          of a successor Trustee shall be made pursuant to the foregoing
          provisions of this Article X prior to the date specified in the
          notice of resignation as the date when such resignation is to
          take effect, the retiring Trustee may forthwith apply to a court
          of competent jurisdiction for the appointment of a successor
          Trustee.  If no appointment of a successor Trustee shall be made
          pursuant to the foregoing provisions of this Article X within six
          months after a vacancy shall have occurred in the office of
          Trustee, any Owner of a Bond may apply to any court of competent
          jurisdiction to appoint a successor Trustee.  Such court may
          thereupon, after such notice, if any, as it may deem proper and
          prescribe, appoint a successor Trustee.

               Section 10.16.  Acceptance of Trusts by Successor Trustee. 
          Any successor Trustee appointed hereunder shall execute,
          acknowledge and deliver to the Authority an instrument accepting
          such appointment hereunder, and thereupon such successor Trustee,
          without any further act, deed or conveyance, shall become duly
          vested with all the estates, property, rights, powers, trusts,
          duties and obligations of its predecessor in the trust hereunder,
          with like effect as if originally named Trustee herein.  Upon
          request of such Trustee, such predecessor Trustee and the
          Authority shall execute and deliver an instrument transferring to
          such successor Trustee all the estates, property, rights, powers
          and trusts hereunder of such predecessor Trustee and, subject to
          the provisions of Section 10.04 hereof, such predecessor Trustee
          shall pay over to the successor Trustee all moneys and other
          assets at the time held by it hereunder.

               Section 10.17.  Successor by Merger or Consolidation.  Any
          corporation or association into which any Trustee hereunder may
          be merged or converted or with which it may be consolidated, or
          any corporation or association resulting from any merger or
          consolidation to which any Trustee hereunder shall be a party or
          any corporation or association succeeding to the corporate trust
          business of the Trustee, shall be the successor Trustee under
          this Indenture, without the execution or filing of any paper or
          any further act on the part of the parties hereto, anything in
          this Indenture to the contrary notwithstanding.

               If, at the time any such successor to the Trustee shall
          succeed to the trusts created by this Indenture, any of the Bonds
          shall have been authenticated but not delivered, such successor
          Trustee may adopt the certificate of authentication of any
          predecessor Trustee and deliver such Bonds so authenticated; and
          if at that time, any of the Bonds shall not have been
          authenticated, such successor Trustee may authenticate such Bonds
          either in the name of any such predecessor hereunder or in the
          name of such successor; and, in all such cases, such certificate
          of authentication shall have the full force which it is anywhere
          in the Bonds or in this Indenture provided that the certificate
          of authentication of the Trustee shall have; provided, however,
          that the right to adopt the certificate of authentication of any
          predecessor Trustee or to authenticate Bonds in the name of any
          predecessor Trustee shall apply only to its successor or
          successors by merger, conversion or consolidation.

               Section 10.18.  Standard of Care.  Notwithstanding any other
          provisions of this Article X, the Trustee shall, during the
          existence of an Event of Default of which the Trustee has actual
          notice, exercise such of the rights and powers vested in it by
          this Indenture and use the same degree of skill and care in their
          exercise as a prudent man would use and exercise under the
          circumstances in the conduct of his own affairs.

               Section 10.19.  Notice to Owners of Bonds of Event of
          Default.  If an Event of Default occurs of which the Trustee by
          Section 10.05 hereof is required to take notice and deemed to
          have notice, or any other Event of Default occurs of which the
          Trustee has been specifically notified in accordance with Section
          10.05 hereof, and any such Event of Default shall continue for at
          least two days after the Trustee acquires actual notice thereof,
          unless the Trustee shall have theretofore given a notice of
          acceleration pursuant to Section 9.01 hereof, the Trustee shall
          give Notice by Mail to all Owners of Outstanding Bonds.

               Section 10.20.  Intervention in Litigation of the Authority. 
          In any judicial proceeding to which the Authority is a party and
          which in the opinion of the Trustee and its counsel has a
          substantial bearing on the interests of the Owners of Bonds, the
          Trustee may intervene on behalf of the Owners of the Bonds and
          shall, upon receipt of indemnity satisfactory to it, do so if
          requested in writing by Owners of at least a majority in
          principal amount of the Bonds then Outstanding if permitted by
          the court having jurisdiction in the premises.

               Section 10.21.  Paying Agent; Co-Paying Agents.  The
          Authority shall, with the approval of the Company, appoint the
          Paying Agent for the Bonds and may at any time or from time to
          time, with the approval of the Company, appoint one or more
          Co-Paying Agents for the Bonds, subject to the conditions set
          forth in Section 10.22 hereof.  The Paying Agent and each
          Co-Paying Agent shall designate to the Trustee its Principal
          Office and signify its acceptance of the duties and obligations
          imposed upon it hereunder by a written instrument of acceptance
          delivered to the Authority and the Trustee in which such Paying
          Agent or Co-Paying Agent will agree, particularly:

                    (a) to hold all sums held by it for the payment of the
               principal of and premium, if any, or interest on Bonds in
               trust for the benefit of the Owners of the Bonds until such
               sums shall be paid to such Owners or otherwise disposed of
               as herein provided;

                    (b) to keep such books and records as shall be
               consistent with prudent industry practice, to make such
               books and records available for inspection by the Authority,
               the Trustee and the Company at all reasonable times and, in
               the case of a Co-Paying Agent, to promptly furnish copies of
               such books and records to the Paying Agent; and

                    (c) in the case of a Co-Paying Agent, upon the request
               of the Paying Agent, to forthwith deliver to the Paying
               Agent all sums so held in trust by such Co-Paying Agent.

               The Authority shall cooperate with the Trustee and the
          Company to cause the necessary arrangements to be made and to be
          thereafter continued whereby funds derived from the sources
          specified in Sections 4.03 and 4.04 hereof will be made available
          to the Paying Agent and each Co-Paying Agent for the payment when
          due of the principal of, premium, if any, and interest on the
          Bonds.

               Section 10.22.  Qualifications of Paying Agent and Co-Paying
          Agents; Resignation; Removal.  The Paying Agent and any Co-Paying
          Agent shall be a corporation or association duly organized under
          the laws of the United States of America or any state or
          territory thereof, having a combined capital stock, surplus and
          undivided profits of at least $15,000,000 and authorized by law
          to perform all the duties imposed upon it by this Indenture.  The
          Paying Agent and any Co-Paying Agent may at any time resign and
          be discharged of the duties and obligations created by this
          Indenture by giving at least sixty (60) days' notice to the
          Authority, the Company and the Trustee.  The Paying Agent and any
          Co-Paying Agent may be removed at any time, at the direction of
          the Company, by an instrument, signed by the Authority, filed
          with the Paying Agent or such Co-Paying Agent, as the case may
          be, and with the Trustee.

               In the event of the resignation or removal of the Paying
          Agent or any Co-Paying Agent, the Paying Agent or such Co-Paying
          Agent, as the case may be, shall pay over, assign and deliver any
          moneys held by it in such capacity to its successor or, if there
          be no successor, to the Trustee.

               In the event that the Authority shall fail to appoint a
          Paying Agent hereunder, or in the event that the Paying Agent
          shall resign or be removed, or be dissolved, or if the property
          or affairs of the Paying Agent shall be taken under the control
          of any state or federal court or administrative body because of
          bankruptcy or insolvency, or for any other reason, and the
          Authority shall not have appointed its successor as Paying Agent,
          the Trustee shall ipso facto be deemed to be the Paying Agent for
          all purposes of this Indenture until the appointment by the
          Authority of the Paying Agent or successor Paying Agent, as the
          case may be.

               Upon the appointment of a successor Paying Agent, the
          Trustee shall give notice thereof by Mail to all Owners of Bonds.

               Section 10.23.  Registrar.  The Authority shall, with the
          approval of the Company, appoint the Registrar for the Bonds,
          subject to the conditions set forth in Section 10.24 hereof.  The
          Registrar shall designate to the Trustee its Principal Office and
          signify its acceptance of the duties imposed upon it hereunder by
          a written instrument of acceptance delivered to the Authority and
          the Trustee in which such Registrar will agree, particularly, to
          keep such books and records as shall be consistent with prudent
          industry practice and to make such books and records available
          for inspection by the Authority, the Trustee and the Company at
          all reasonable times.

               The Authority shall cooperate with the Trustee and the
          Company to cause the necessary arrangements to be made and to be
          thereafter continued whereby Bonds, executed by the Authority and
          authenticated by the Trustee, shall be made available for
          exchange, registration and registration of transfer at the
          Principal Office of the Registrar.  The Authority shall cooperate
          with the Trustee, the Registrar and the Company to cause the
          necessary arrangements to be made and thereafter continued
          whereby the Paying Agent and any Co-Paying Agent shall be
          furnished such records and other information, at such times, as
          shall be required to enable the Paying Agent and such Co-Paying
          Agent to perform the duties and obligations imposed upon them
          hereunder.

               Section 10.24.  Qualifications of Registrar; Resignation;
          Removal.  The Registrar shall be a corporation or association
          duly organized under the laws of the United States of America or
          any state or territory thereof, having a combined capital stock,
          surplus and undivided profits of at least $15,000,000 and
          authorized by law to perform all the duties imposed upon it by
          this Indenture.  The Registrar may at any time resign and be
          discharged of the duties and obligations created by this
          Indenture by giving at least sixty (60) days' notice to the
          Authority, the Trustee and the Company.  The Registrar may be
          removed at any time, at the direction of the Company, by an
          instrument signed by the Authority filed with the Registrar and
          the Trustee.

               In the event of the resignation or removal of the Registrar,
          the Registrar shall deliver any Bonds held by it in such capacity
          to its successor or, if there be no successor, to the Trustee.

               In the event that the Authority shall fail to appoint a
          Registrar hereunder, or in the event that the Registrar shall
          resign or be removed, or be dissolved, or if the property or
          affairs of the Registrar shall be taken under the control of any
          state or federal court or administrative body because of
          bankruptcy or insolvency, or for any other reason, and the
          Authority shall not have appointed its successor as Registrar,
          the Trustee shall ipso facto be deemed to be the Registrar for
          all purposes of this Indenture until the appointment by the
          Authority of the Registrar or successor Registrar, as the case
          may be.

               Upon the appointment of a successor Registrar, the Trustee
          shall give notice thereof by Mail to all Owners of Bonds.

               Section 10.25.  Several Capacities.  Anything herein to the
          contrary notwithstanding, the same entity may serve hereunder as
          the Trustee, the Paying Agent or a Co-Paying Agent and the
          Registrar and in any combination of such capacities to the extent
          permitted by law.


                                      ARTICLE XI

                   EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
                             PROOF OF OWNERSHIP OF BONDS

               Section 11.01.  Execution of Instruments; Proof of
          Ownership.  Any request, direction, consent or other instrument
          in writing, whether or not required or permitted by this
          Indenture to be signed or executed by Owners of the Bonds, may be
          in any number of concurrent instruments of similar tenor and may
          be signed or executed by Owners of the Bonds or by an agent
          appointed by an instrument in writing.  Proof of the execution of
          any such instrument and of the ownership of Bonds shall be
          sufficient for any purpose of this Indenture and shall be
          conclusive in favor of the Trustee with regard to any action
          taken by it under such instrument if made in the following
          manner:

                    (a) The fact and date of the execution by any person of
               any such instrument may be proved by the certificate of any
               officer in any jurisdiction who, by the laws thereof, has
               power to take acknowledgments within such jurisdiction, to
               the effect that the person signing such instrument
               acknowledged before him the execution thereof, or by an
               affidavit of a witness to such execution.

                    (b) The ownership or former ownership of Bonds shall be
               proved by the registration books kept under the provisions
               of Section 2.08 hereof.

               Nothing contained in this Article XI shall be construed as
          limiting the Trustee to such proof, it being intended that the
          Trustee may accept any other evidence of matters herein stated
          which it may deem sufficient.  Any request or consent of any
          Owner of a Bond shall bind every future Owner of the same Bond or
          any Bond or Bonds issued in lieu thereof in respect of anything
          done by the Trustee or the Authority in pursuance of such request
          or consent.


                                     ARTICLE XII

                MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

               Section 12.01.  Limitations.  Neither this Indenture nor the
          Loan Agreement shall be modified or amended in any respect
          subsequent to the original issuance of the Bonds except as
          provided in and in accordance with and subject to the provisions
          of this Article XII and Section 7.04 hereof.

               The Trustee may, but shall not be obligated to, enter into
          any Supplemental Indenture which affects the Trustee's own
          rights, duties or immunities under this Indenture or otherwise.

               Section 12.02.  Supplemental Indentures without Owner
          Consent.  The Authority and the Trustee may, from time to time
          and at any time, without the consent of or notice to the Owners
          of the Bonds, enter into Supplemental Indentures as follows:

                    (a) to cure any formal defect, omission, inconsistency
               or ambiguity in this Indenture, provided, however, that such
               cure shall not materially and adversely affect the interests
               of the Owners of the Bonds;

                    (b) to grant to or confer or impose upon the Trustee
               for the benefit of the Owners of the Bonds any additional
               rights, remedies, powers, authority, security, liabilities
               or duties which may lawfully be granted, conferred or
               imposed;

                    (c) to add to the covenants and agreements of, and
               limitations and restrictions upon, the Authority in this
               Indenture other covenants, agreements, limitations and
               restrictions to be observed by the Authority;

                    (d) to confirm, as further assurance, any pledge under,
               and the subjection to any claim, lien or pledge created or
               to be created by, this Indenture, of the Receipts and
               Revenues of the Authority from the Loan Agreement or of any
               other moneys, securities or funds;

                    (e) to authorize a different denomination or
               denominations of the Bonds and to make correlative
               amendments and modifications to this Indenture regarding
               exchange ability of Bonds of different denominations,
               redemptions of portions of Bonds of particular denominations
               and similar amendments and modifications of a technical
               nature;

                    (f) to modify, alter, supplement or amend this
               Indenture in such manner as shall permit the qualification
               hereof under the Trust Indenture Act of 1939, as from time
               to time amended;

                    (g) to modify, alter, supplement or amend this
               Indenture in such manner as shall be necessary, desirable or
               appropriate in order to provide for or eliminate the
               registration and registration of transfer of the Bonds
               through a book-entry or similar method, whether or not the
               Bonds are evidenced by certificates;

                    (h) to modify, alter, amend or supplement this
               Indenture in any other respect which is not materially
               adverse to the Owners and which does not involve a change
               described in clause (i), (ii), (iii) or (iv) of Section
               12.03(a) hereof; and

                    (i) to provide any additional procedures, covenants or
               agreements necessary or desirable to maintain the tax-exempt
               status of interest on the Bonds.

               Before the Authority and the Trustee shall enter into any
          Supplemental Indenture pursuant to this Section 12.02, there
          shall have been delivered to the Trustee an opinion of Bond
          Counsel stating that such Supplemental Indenture is authorized or
          permitted by this Indenture and the Act, complies with their
          respective terms, will, upon the execution and delivery thereof,
          be valid and binding upon the Authority in accordance with its
          terms and will not, in and of itself, adversely affect the
          exclusion from gross income for federal tax purposes of the
          interest on the Bonds.

               Section 12.03.  Supplemental Indentures with Consent of
          Owners.  (a) Except for any Supplemental Indenture entered into
          pursuant to Section 12.02 hereof, subject to the terms and
          provisions contained in this Section 12.03 and Section 12.05 and
          not otherwise, Owners of not less than a majority in aggregate
          principal amount of the Bonds then Outstanding which would be
          adversely affected thereby shall have the right from time to time
          to consent to and approve the execution and delivery by the
          Authority and the Trustee of any Supplemental Indenture deemed
          necessary or desirable by the Authority for the purposes of
          modifying, altering, amending, supplementing or rescinding, in
          any particular, any of the terms or provisions contained in this
          Indenture; provided, however, that, unless approved in writing by
          the Owners of all the Bonds then Outstanding which would be
          adversely affected thereby, nothing herein contained shall
          permit, or be construed as permitting, (i) a change in the times,
          amounts or currency of payment of the principal of or premium, if
          any, or interest on any Outstanding Bond, a reduction in the
          principal amount or redemption price of any Outstanding Bond or a
          change in the rate of interest thereon, or any impairment of the
          right of any Owner to institute suit for the payment of any Bond
          owned by it, or (ii) the creation of a claim or lien upon, or a
          pledge of, the Receipts and Revenues of the Authority from the
          Loan Agreement ranking prior to or on a parity with the claim,
          lien or pledge created by this Indenture (except as referred to
          in Section 10.04 hereof), or (iii) a preference or priority of
          any Bond or Bonds over any other Bond or Bonds, or (iv) a
          reduction in the aggregate principal amount of Bonds the consent
          of the Owners of which is required for any such Supplemental
          Indenture or which is required, under Section 12.07 hereof, for
          any modification, alteration, amendment or supplement to the Loan
          Agreement.

               (b) If at any time the Authority shall request the Trustee
          to enter into any Supplemental Indenture for any of the purposes
          of this Section 12.03, the Trustee shall cause notice of the
          proposed Supplemental Indenture to be given by Mail to all Owners
          of Outstanding Bonds.  Such notice shall briefly set forth the
          nature of the proposed Supplemental Indenture and shall state
          that a copy thereof is on file at the Principal Office of the
          Trustee for inspection by all Owners of Bonds.

               (c) Within two years after the date of the first mailing of
          such notice, the Authority and the Trustee may enter into such
          Supplemental Indenture in substantially the form described in
          such notice only if there shall have first been delivered to the
          Trustee (i) the required consents, in writing, of Owners of Bonds
          and (ii) an opinion of Bond Counsel stating that such
          Supplemental Indenture is authorized or permitted by this
          Indenture and the Act, complies with their respective terms and,
          upon the execution and delivery thereof, will be valid and
          binding upon the Authority in accordance with its terms and will
          not, in and of itself, adversely affect the exclusion from gross
          income for federal tax purposes of the interest on the Bonds.

               (d) If Owners of not less than the percentage of Bonds
          required by this Section 12.03 shall have consented to and
          approved the execution and delivery thereof as herein provided,
          no Owner shall have any right to object to the execution and
          delivery of such Supplemental Indenture, or to object to any of
          the terms and provisions contained therein or the operation
          thereof, or in any manner to question the propriety of the
          execution and delivery thereof, or to enjoin or restrain the
          Authority or the Trustee from executing and delivering the same
          or from taking any action pursuant to the provisions thereof.

               Section 12.04.  Effect of Supplemental Indenture.  Upon the
          execution and delivery of any Supplemental Indenture pursuant to
          the provisions of this Article XII, this Indenture shall be, and
          be deemed to be, modified, altered, amended or supplemented in
          accordance therewith, and the respective rights, duties and
          obligations under this Indenture of the Authority, the Trustee
          and Owners of all Bonds then Outstanding shall thereafter be
          determined, exercised and enforced under this Indenture subject
          in all respects to such modifications, alterations, amendments
          and supplements.

               Section 12.05.  Consent of the Company.  Anything herein to
          the contrary notwithstanding, any Supplemental Indenture under
          this Article XII which affects any rights, powers, agreements or
          obligations of the Company under the Loan Agreement, or requires
          a revision of the Loan Agreement, shall not become effective
          unless and until the Company shall have consented to such
          Supplemental Indenture.

               Section 12.06.  Amendment of Loan Agreement without Consent
          of Owners.  Without the consent of or notice to the Owners of the
          Bonds, the Authority may enter into any Supplemental Loan
          Agreement, and the Trustee may consent thereto, as may be
          required (a) by the provisions of the Loan Agreement and this
          Indenture, (b) for the purpose of curing any formal defect,
          omission, inconsistency or ambiguity therein, (c) to provide any
          additional procedures, covenants or agreements necessary or
          desirable to maintain the tax-exempt status of interest on the
          Bonds, or (d) in connection with any other change therein which
          is not materially adverse to the Owners of the Bonds.  A revision
          of Exhibit A to the Loan Agreement pursuant to Section 3.03
          thereof shall not be deemed a Supplemental Loan Agreement for
          purposes of this Indenture.

               Before the Authority shall enter into, and the Trustee shall
          consent to, any Supplemental Loan Agreement pursuant to this
          Section 12.06, there shall have been delivered to the Trustee an
          opinion of Bond Counsel stating that such Supplemental Loan
          Agreement is authorized or permitted by this Indenture and the
          Act, complies with their respective terms, will, upon the
          execution and delivery thereof, be valid and binding upon the
          Authority and the Company in accordance with its terms and will
          not, in and of itself, adversely affect the exclusion from gross
          income for federal tax purposes of interest on the Bonds.

               Section 12.07.  Amendment of Loan Agreement with Consent of
          Owners.  Except in the case of Supplemental Loan Agreements
          referred to in Section 12.06 hereof, the Authority shall not
          enter into, and the Trustee shall not consent to, any
          Supplemental Loan Agreement without the written approval or
          consent of the Owners of not less than a majority in aggregate
          principal amount of the Bonds then Outstanding which would be
          adversely affected thereby, given and procured as provided in
          Section 12.03 hereof; provided, however, that, unless approved in
          writing by the Owners of all Bonds then Outstanding which would
          be adversely affected thereby, nothing herein contained shall
          permit, or be construed as permitting, a change in the
          obligations of the Company under Section 5.01 of the Loan
          Agreement.  If at any time the Authority or the Company shall
          request the consent of the Trustee to any such proposed
          Supplemental Loan Agreement, the Trustee shall cause notice of
          such proposed Supplemental Loan Agreement to be given in the same
          manner as provided by Section 12.03 hereof with respect to
          Supplemental Indentures.  Such notice shall briefly set forth the
          nature of such proposed Supplemental Loan Agreement and shall
          state that copies of the instrument embodying the same are on
          file at the Principal Office of the Trustee for inspection by all
          Owners of the Bonds.  The Authority may enter into, and the
          Trustee may consent to, any such proposed Supplemental Loan
          Agreement subject to the same conditions, and with the same
          effect, as provided by Section 12.03 hereof with respect to
          Supplemental Indentures.


                                     ARTICLE XIII

                                    MISCELLANEOUS

               Section 13.01.  Successors of the Authority.  In the event
          of the dissolution of the Authority, all the covenants,
          stipulations, promises and agreements in this Indenture
          contained, by or on behalf of, or for the benefit of, the
          Authority, shall bind or inure to the benefit of the successors
          of the Authority from time to time and any entity, officer,
          board, commission, agency or instrumentality to whom or to which
          any power or duty of the Authority shall be transferred.

               Section 13.02.  Parties in Interest.  Except as herein
          otherwise specifically provided, nothing in this Indenture
          expressed or implied is intended or shall be construed to confer
          upon any person, firm or corporation other than the Authority,
          the Company and the Trustee and their successors and assigns and
          the Owners of the Bonds any right, remedy or claim under or by
          reason of this Indenture, this Indenture being intended to be for
          the sole and exclusive benefit of the Authority, the Company and
          the Trustee and their successors and assigns and the Owners of
          the Bonds.

               Section 13.03.  Severability.  In case any one or more of
          the provisions of this Indenture or of the Loan Agreement or of
          the Bonds shall, for any reason, be held to be illegal or
          invalid, such illegality or invalidity shall not affect any other
          provisions of this Indenture or of the Loan Agreement or of such
          Bonds, and this Indenture and the Loan Agreement and such Bonds
          shall be construed and enforced as if such illegal or invalid
          provisions had not been contained herein or therein.

               Section 13.04.  No Personal Liability of Authority
          Officials.  No covenant or agreement contained in the Bonds or in
          this Indenture shall be deemed to be the covenant or agreement of
          any director, official, officer, agent, or employee of the
          Authority in his individual capacity, and neither the members of
          the Board of Directors of the Authority nor any official
          executing the Bonds shall be liable personally on the Bonds or be
          subject to any personal liability or accountability by reason of
          the issuance thereof.

               Section 13.05.  Bonds Owned by the Authority or the Company. 
          In determining whether Owners of the requisite aggregate
          principal amount of the Bonds have concurred in any direction,
          consent or waiver under this Indenture, Bonds which are owned by
          the Authority or the Company or by any person directly or
          indirectly controlling or controlled by or under direct or
          indirect common control with the Company (unless the Authority,
          the Company or such person owns all Bonds which are then
          Outstanding, determined without regard to this Section 13.05)
          shall be disregarded and deemed not to be Outstanding for the
          purpose of any such determination, except that, for the purpose
          of determining whether the Trustee shall be protected in relying
          on any such direction, consent or waiver, only Bonds which the
          Trustee knows are so owned shall be so disregarded.  Upon the
          request of the Trustee, the Company and the Authority shall
          furnish to the Trustee a certificate identifying all Bonds, if
          any, actually known to either of them to be owned or held by or
          for the account of any of the above-described persons, and the
          Trustee shall be entitled to rely on such certificate as
          conclusive evidence of the facts set forth therein and that all
          other Bonds are Outstanding for the purposes of such
          determination.  Bonds so owned which have been pledged in good
          faith may be regarded as Outstanding if the pledgee establishes
          to the satisfaction of the Trustee the pledgee's right so to act
          with respect to such Bonds and that the pledgee is not the
          Authority or the Company or any person directly or indirectly
          controlling or controlled by or under direct or indirect common
          control with the Company. 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.

               Section 13.06.  Counterparts.  This Indenture may be
          executed in any number of counterparts, each of which, when so
          executed and delivered, shall be an original; but such
          counterparts shall together constitute but one and the same
          Indenture.

               Section 13.07.  Governing Law.  The laws of the State of
          Arizona shall govern the construction and enforcement of this
          Indenture and of all Bonds, except that the laws of the State of
          New York shall govern the construction and enforcement of the
          rights and duties of the Trustee hereunder and the construction
          of Section 13.09 hereof and the computation of any period of
          grace provided herein.

               Section 13.08.  Notices.  Except as otherwise provided in
          this Indenture, all notices, certificates, requests requisitions
          or other communications by the Authority, the Company, the
          Trustee, the Paying Agent, any Co-Paying Agent or the Registrar
          pursuant to this Indenture shall be in writing and shall be
          sufficiently given and shall be deemed given when mailed by
          registered mail, postage prepaid, addressed as follows: If to the
          Authority, c/o Russo, Cox & Russo, P.C., 1820 East River Road,
          Suite 230, Tucson, Arizona 85718; if to the Company, at 220 West
          Sixth Street, Tucson, Arizona 85702, Attention: Treasurer; if to
          the Trustee, at 100 Wall Street, Suite 1600, New York, New York
          10005, Attention: Vice President; if to the Paying Agent, any
          Co-Paying Agent or the Registrar, at the address designated in
          the acceptance of appointment or engagement.  Any of the
          foregoing may, by notice given hereunder to each of the others,
          designate any further or different addresses to which subsequent
          notices, certificates, requests or other communications shall be
          sent hereunder.

               Section 13.09.  Holidays.  If the date for making any
          payment or the last date for performance of any act or the
          exercising of any right, as provided in this Indenture, shall be
          a Saturday, Sunday or a public holiday in the city in which is
          located the Principal Office of the Trustee, such payment may be
          made or act performed or right exercised on the next succeeding
          business day, with the same force and effect as if done on the
          nominal date provided in this Indenture, and no interest shall
          accrue for the period after such nominal date.  If the last day
          of any period of grace, as provided in this Indenture, shall be a
          Saturday, Sunday or a public holiday in the city in which is
          located the Principal Office of the Trustee, the last day of such
          period of grace shall be deemed to be the next succeeding
          business day.

               Section 13.10.  Statutory Notice Regarding Cancellation of
          Contracts.  As required by the provisions of Section 38-511,
          Arizona Revised Statutes, as amended, notice is hereby given that
          political subdivisions of the State of Arizona or any of their
          departments or agencies may, within three (3) years of its
          execution, cancel any contract, without penalty or further
          obligation, made by the political subdivisions or any of their
          departments or agencies on or after September 30, 1988, if any
          person significantly involved in initiating, negotiating,
          securing, drafting or creating the contract on behalf of the
          political subdivisions or any of their departments or agencies
          is, at any time while the contract or any extension of the
          contact is in effect, an employee or agent of any other party to
          the contract in any capacity or a consultant to any other party
          of the contract with respect to the subject matter of the
          contract.

               The Trustee covenants and agrees not to employ as an
          employee, agent or, with respect to the subject matter of this
          Indenture, a consultant, any person actually known by the Trustee
          to be significantly involved in initiating, negotiating,
          securing, drafting or creating such Indenture on behalf of the
          Authority within three (3) years from the execution hereof,
          unless a waiver is provided by the Authority.


          <PAGE>


                IN WITNESS WHEREOF, The Industrial Development Authority of
          the County of Pima has caused this Indenture to be executed by
          its President and First Trust of New York, National Association
          has caused this Indenture to be executed on its behalf by its
          Vice President, all as of the day and year first above written.

                                   THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                   OF THE COUNTY OF PIMA

                                   By:  /s/Stanley Lehman
                                      ---------------------------------
                                      President

                                   FIRST TRUST OF NEW YORK,
                                   NATIONAL ASSOCIATION



                                   By:  /s/ P.J. Crowley
                                      ---------------------------------
                                      Vice President


          <PAGE>


                                                                  EXHIBIT A


                                    (FORM OF BOND)

          No.


                         THE INDUSTRIAL DEVELOPMENT AUTHORITY
                                OF THE COUNTY OF PIMA
                         INDUSTRIAL DEVELOPMENT REVENUE BOND,
                                    1997 SERIES C
                       (TUCSON ELECTRIC POWER COMPANY PROJECT)

          INTEREST RATE (PER ANNUM):
          MATURITY DATE:                               DATED:
          CUSIP:
          REGISTERED OWNER:
          PRINCIPAL AMOUNT:                            DOLLARS


               The Industrial Development Authority of the County of Pima,
          an Arizona nonprofit corporation designated by law as a political
          subdivision of the State of Arizona (the "Authority"), for value
          received, hereby promises to pay (but only out of the Receipts
          and Revenues of the Authority from the Loan Agreement, as
          hereinafter defined, and other moneys pledged therefor) to the
          Registered Owner identified above or registered assigns, on the
          Maturity Date set forth above, upon the presentation and
          surrender hereof, the Principal Amount set forth above and to pay
          (but only out of the Receipts and Revenues of the Authority from
          the Loan Agreement and other moneys pledged therefor), interest
          on said Principal Amount until payment of said Principal Amount
          has been made or duly provided for, from the date hereof, at the
          Interest Rate set forth above, semi-annually on the first days of
          March and September in each year, commencing March 1, 1998. 
          Interest will be calculated on the basis of a 360-day year of
          twelve 30-day months.

               The principal of and premium, if any, on this Bond are
          payable at the principal office of First Trust of New York,
          National Association, as Paying Agent, or at the principal office
          of any co-paying agent appointed in accordance with the Indenture
          (as hereinafter defined), at the option of the Registered Owner
          hereof.  Interest on this Bond is payable by check drawn upon the
          Paying Agent and mailed to the Registered Owner of this Bond as
          of the close of business on the Record Date (as defined in the
          Indenture) at the registered address of such Registered Owner;
          notwithstanding the foregoing, upon request to the Paying Agent
          by a Registered Owner of not less than $1,000,000 in aggregate
          principal amount of Bonds, interest on such Bonds and, after
          presentation and surrender of such Bonds, the principal thereof
          shall be paid to such Registered Owner by wire transfer to the
          account maintained within the continental United States specified
          by such Registered Owner or, if such Registered Owner maintains
          an account with the entity acting as Paying Agent, by deposit
          into such account.  Payment of the principal of and premium, if
          any, and interest on, this Bond shall be in any coin or currency
          of the United States of America as, at the respective times of
          payment, shall be legal tender for the payment of public and
          private debts.

               This Bond is one of the duly authorized Industrial
          Development Revenue Bonds, 1997 Series C (Tucson Electric Power
          Company Project) (the "Bonds") of the Authority, aggregating
          Seventy-Five Million Dollars ($75,000,000) in principal amount,
          issued under and pursuant to the Constitution and laws of the
          State of Arizona, particularly Title 35, Chapter 5, Arizona
          Revised Statutes, as amended (the "Act"), and the Indenture of
          Trust, dated as of September 15, 1997 (the "Indenture"), between
          the Authority and First Trust of New York, National Association,
          as trustee (the "Trustee"), for the purpose of refinancing, by
          payment or redemption of the Authority's Industrial Development
          Revenue Bonds, 1983 Series A (Tucson Electric Power Company
          General Project), or provision therefor, a portion of the costs
          of the acquisition, construction, improvement and equipping of
          certain facilities for the furnishing of electric energy (the
          "Facilities").  Pursuant to the Loan Agreement, dated as of
          September 15, 1997 (the "Loan Agreement"), between the Authority
          and Tucson Electric Power Company, a corporation organized and
          existing under the laws of the State of Arizona (the "Company"),
          the proceeds of the Bonds, other than accrued interest, if any,
          paid by the initial purchasers thereof, will be loaned to the
          Company.

               Neither Pima County, Arizona nor the State of Arizona shall
          in any event be liable for the payment of the principal of or
          premium, if any, or interest on the Bonds, and neither the Bonds,
          nor the premium, if any, or the interest thereon, shall be
          construed to constitute an indebtedness of Pima County, Arizona
          or the State of Arizona within the meaning of any constitutional
          or statutory provisions whatsoever.  The Bonds and the premium,
          if any, and the interest thereon are limited obligations of the
          Authority payable solely from the Receipts and Revenues of the
          Authority from the Loan Agreement and other moneys pledged
          therefor under the Indenture.

               The Bonds are equally and ratably secured, to the extent
          provided in the Indenture, by the pledge thereunder of the
          "Receipts and Revenues of the Authority from the Loan Agreement",
          which term is used herein as defined in the Indenture and which
          as therein defined means all moneys paid or payable to the
          Trustee for the account of the Authority by the Company in
          respect of the loan payments, including all receipts of the
          Trustee which, under the provisions of the Indenture, reduce the
          amounts of such payments. The Authority has also pledged and
          assigned to the Trustee as security for the Bonds all other
          rights and interests of the Authority under the Loan Agreement
          (other than its rights to indemnification and its administrative
          expenses and certain other rights).

               The transfer of this Bond shall be registered upon the
          registration books kept at the principal office of First Trust of
          New York, National Association, as Registrar, at the written
          request of the Registered Owner hereof or his attorney duly
          authorized in writing, upon surrender of this Bond at said
          office, together with a written instrument of transfer
          satisfactory to the Registrar duly executed by the Registered
          Owner or his duly authorized attorney.

               In the manner and with the effect provided in the Indenture,
          each of the Bonds may be redeemed prior to maturity, as follows:

                    (a) The Bonds shall be subject to redemption by the
               Authority, at the direction of the Company, on any date on
               or after September 1, 2002 in whole at any time or in part
               from time to time, at the applicable redemption price
               (expressed as a percentage of principal amount) set forth
               below, plus accrued interest to the redemption date:

                  Redemption Period                 Redemption Price
                  -----------------                 ----------------

          September 1, 2002 through August 31, 2003        102%
          September 1, 2003 through August 31, 2004        101%
          September 1, 2004 and thereafter                 100%

                    (b)  The Bonds shall be subject to redemption by the
               Authority, at the direction of the Company, in whole at any
               time at the principal amount thereof plus accrued interest
               to the redemption date, if:

                         (i) the Company shall have determined that the
                    continued operation of the Facilities is impracticable,
                    uneconomical or undesirable for any reason;

                         (ii) all or substantially all of the Facilities
                    shall have been condemned or taken by eminent domain;
                    or

                         (iii) the operation of the Facilities shall have
                    been enjoined or shall have otherwise been prohibited
                    by, or shall conflict with, any order, decree, rule or
                    regulation of any court or of any federal, state or
                    local regulatory body, administrative agency or other
                    governmental body.

                    (c)  The Bonds shall be subject to mandatory redemption
               by the Authority, at the principal amount thereof plus
               accrued interest to the redemption date, on the 180th day
               (or such earlier date as may be designated by the Company)
               after a final determination by a court of competent
               jurisdiction or an administrative agency, to the effect
               that, as a result of a failure by the Company to perform or
               observe any covenant, agreement or representation contained
               in the Loan Agreement, the interest payable on the Bonds is
               included for federal income tax purposes in the gross income
               of the owners thereof, other than any owner of a Bond who is
               a "substantial user" of the Facilities or a "related person"
               within the meaning of Section 103(b)(13) of the Internal
               Revenue Code of 1954, as amended (the "1954 Code").  No
               determination by any court or administrative agency shall be
               considered final for the purposes of this paragraph (c)
               unless the Company shall have been given timely notice of
               the proceeding which resulted in such determination and an
               opportunity to participate in such proceeding, either
               directly or through an owner of a Bond, and until the
               conclusion of any appellate review sought by any party to
               such proceeding or the expiration of the time for seeking
               such review. The Bonds shall be redeemed either in whole or
               in part in such principal amount that, in the opinion of
               Bond Counsel, the interest payable on the Bonds, including
               the Bonds remaining outstanding after such redemption, would
               not be included in the gross income of any owner thereof,
               other than an owner of a Bond who is a "substantial user" of
               the Facilities or a "related person" within the meaning of
               Section 103(b)(13) of the 1954 Code.

               If less than all of the Bonds at the time outstanding are to
          be called for redemption, the particular Bonds or portions of
          Bonds to be redeemed shall be selected by the Trustee, in such
          manner as the Trustee in its discretion may deem proper, in the
          principal amounts designated to the Trustee by the Company or
          otherwise as required by the Indenture.

               In the event any of the Bonds are called for redemption, the
          Trustee shall give notice, in the name of the Authority, of the
          redemption of such Bonds.  Such notice shall be given by mailing
          a copy of the redemption notice by first-class mail at least
          thirty (30) days prior to the date fixed for redemption to the
          Registered Owners of the Bonds to be redeemed at the addresses
          shown on the registration books; provided, however, that failure
          duly to give such notice by mailing, or any defect therein, shall
          not affect the validity of any proceedings for the redemption of
          the Bonds as to which there shall be no such failure or defect.

               With respect to any notice of redemption of Bonds in
          accordance with the redemption provisions lettered (a) or (b)
          above, unless, upon the giving of such notice, such Bonds shall
          be deemed to have been paid within the meaning of the Indenture,
          such notice shall state that such redemption, shall be
          conditional upon the receipt, by the Trustee on or prior to the
          opening of business on the date fixed for such redemption of
          moneys sufficient to pay the principal of and premium, if any,
          and interest on such Bonds to be redeemed, and that if such
          moneys shall not have been so received said notice shall be of no
          force and effect and the Authority shall not be required to
          redeem such Bonds. In the event that such notice of redemption
          contains such a condition and such moneys are not so received,
          the redemption shall not be made and the Trustee shall within a
          reasonable time thereafter give notice, in the manner in which
          the notice of redemption was given, that such moneys were not so
          received.

               If a notice of redemption shall be unconditional, or if the
          conditions of a conditional notice of redemption shall have been
          satisfied, then upon presentation and surrender of Bonds so
          called for redemption at the place or places of payment, such
          Bonds shall be redeemed.

               Any Bonds and portions of Bonds which have been duly
          selected for redemption shall cease to bear interest on the
          specified redemption date provided that moneys sufficient to pay
          the principal of, premium, if any, and interest on such Bonds
          shall be on deposit with the Trustee on the date fixed for
          redemption so that such Bonds will be deemed to be paid in
          accordance with the Indenture and such Bonds shall thereafter
          cease to be entitled to any lien, benefit or security under the
          Indenture.

               The Registered Owner 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 default under the Indenture, or to institute,
          appear in or defend any suit or other proceeding with respect
          thereto, except as provided in the Indenture.

               With certain exceptions as provided therein, the Indenture
          and the Loan Agreement may be modified or amended only with the
          consent of the Registered Owners of a majority in aggregate
          principal amount of all Bonds outstanding under the Indenture
          which would be adversely affected thereby.

               Reference is hereby made to the Indenture and the Loan
          Agreement, copies of which are on file with the Trustee, for the
          provisions, among others, with respect to the nature and extent
          of the rights, duties and obligations of the Authority, the
          Company, the Trustee and the Registered Owners of the Bonds.  The
          Registered Owner of this Bond, by the acceptance hereof, is
          deemed to have agreed and consented to the terms and provisions
          of the Indenture and the Loan Agreement.

               Among other things, as provided in the Indenture and subject
          to certain limitations therein set forth, this Bond or any
          portion of the principal amount hereof will be deemed to have
          been paid within the meaning and with the effect expressed in the
          Indenture, and the entire indebtedness of the Authority in
          respect thereof shall be satisfied and discharged, if there has
          been irrevocably deposited with the Trustee, in trust, money in
          an amount which will be sufficient and/or Government Obligations
          (as defined in the Indenture), the principal of and interest on
          which, when due, without regard to any reinvestment thereof, will
          provide moneys which, together with moneys deposited with or held
          by the Trustee, will be sufficient, to pay when due the principal
          of and premium, if any, and interest on this Bond or such portion
          of the principal amount hereof when due.

               Among other things, the Loan Agreement contains terms,
          provisions and conditions relating to the consolidation or merger
          of the Company with or into, and the sale, transfer or other
          disposition of assets to, another Person (as defined in the Loan
          Agreement), to the assumption by such other Person, in certain
          circumstances, of all of the obligations of the Company under the
          Loan Agreement and to the release and discharge of the Company,
          in certain circumstances, from such obligations.

               The Authority, the Trustee, the Registrar, the Paying Agent
          and any co-paying agent may deem and treat the person in whose
          name this Bond is registered as the absolute owner hereof for all
          purposes, whether or not this Bond is overdue, and neither the
          Authority, the Trustee, the Paying Agent nor any co-paying agent
          shall be affected by any notice to the contrary.

               It is hereby certified, recited and declared that all acts,
          conditions and things required by the Constitution and laws of
          the State of Arizona to exist, to have happened and to have been
          performed, precedent to and in the execution and delivery of the
          Indenture and the issuance of this Bond, do exist, have happened
          and have been performed in regular and due form as required by
          law.

               No covenant or agreement contained in this Bond or the
          Indenture shall be deemed to be a covenant or agreement of any
          official, officer, agent or employee of the Authority in his
          individual capacity, and neither the members of the Board of
          Directors of the Authority, nor any official executing this Bond,
          shall be liable personally on this Bond or be subject to any
          personal liability or accountability by reason of the issuance or
          sale of this Bond.

               This Bond shall not be entitled to any right or benefit
          under the Indenture, or be valid or become obligatory for any
          purpose, until this Bond shall have been authenticated by the
          execution by the Trustee, or its successor as Trustee, of the
          certificate of authentication inscribed hereon.


          <PAGE>


               IN WITNESS WHEREOF, The Industrial Development Authority of
          The County of Pima has caused this Bond to be executed with the
          manual or facsimile signature of its President or Vice President
          and a facsimile of its official seal to be imprinted hereon and
          attested with the manual or facsimile signature of its Secretary
          or Assistant Secretary.



                                   THE INDUSTRIAL DEVELOPMENT
                                   AUTHORITY OF THE COUNTY OF PIMA
          (Seal)

                                   By.............................
                                               President

          ATTEST:


          .........................
                 Secretary


          <PAGE>

                                                                  EXHIBIT B


                     (FORM FOR ORDINARY REGISTRATION OF TRANSFER)

                       COMPLETE AND SIGN THIS FORM FOR ORDINARY
                               REGISTRATION OF TRANSFER


          FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
          transfer(s) unto


          Please Insert Social Security Or Other Identifying Number of
          Assignee
                                                                       
          ..................................................................
                                                                       
          ..................................................................

          Please print or typewrite name and address including postal zip
          code of assignee

          ..................................................................
          this bond and all rights thereunder, hereby irrevocably
          constituting and appointing ________________________ attorney to
          register such transfer on the registration books in the principal
          office of the Registrar, with full power of substitution in the
          premises.

          Dated:..............     .........................................
                                   NOTE:  The signature on this assignment
                                   must correspond with the name as written
                                   on the face of this Bond in every
                                   particular, without alteration,
                                   enlargement or any change whatsoever.


          <PAGE>


                                                                  EXHIBIT C

                  (FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION)

                            CERTIFICATE OF AUTHENTICATION

                    This is to certify that this Bond is one of the Bonds
               described in the within-mentioned Indenture.


                                FIRST TRUST OF NEW YORK, NATIONAL ASSOCIATION,
                                as Trustee


                                 By .......................................
                                              Authorized Officer



      Date of Authentication:................




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