TUCSON ELECTRIC POWER CO
10-K, 1999-03-31
ELECTRIC SERVICES
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                                   FORM 10-K

     (Mark One)
         [X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
                  For the fiscal year ended December 31, 1998
                                      OR
         [ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
           For the transition period from __________ to __________.

    Commission       Registrant; State of Incorporation;  IRS Employer
    File Number      Address; and Telephone Number        Identification Number
    -----------      -------------------------------      --------------------
    1-13739          UNISOURCE ENERGY CORPORATION         86-0786732
                     (An Arizona Corporation)
                     220 West Sixth Street
                     Tucson, AZ  85701
                     (520) 571-4000

    1-5924           TUCSON ELECTRIC POWER COMPANY        86-0062700
                     (An Arizona Corporation)
                     220 West Sixth Street
                     Tucson, AZ  85701
                     (520) 571-4000

    Securities registered pursuant to Section 12(b) of the Act:

                                                      Name of Each Exchange
    Registrant              Title of Each Class       on Which Registered
    ----------              -------------------       -------------------
    UniSource Energy        Common Stock, no par      New York Stock
    Corporation             value                     Exchange
                                                      Pacific Stock
                                                      Exchange

    Securities registered pursuant to Section 12(g) of the Act:  None

    Indicate by check mark whether each registrant (1) has filed all reports
 required to be filed by Section 13 or 15(d) of the Securities Exchange Act
 1934 during the preceding 12 months (or for such shorter period that the
 registrant was required to file such reports), and (2) has been subject to
 such filing requirements for the past 90 days.    Yes   X    No 
                                                       -----     -----

    Indicate by check mark if disclosure of delinquent filers pursuant to 
 Item 405 of Regulation S-K is not contained herein, and will not be 
 contained, to the best of each registrant's knowledge, in definitive proxy
 or information statements incorporated by reference in Part III of this 
 Form 10-K or any amendment to this Form 10-K. [   ]


    The aggregate market value of UniSource Energy Corporation voting Common
 Stock held by non-affiliates of the registrant was $383,453,950.60 based on
 the last reported sale price thereof on the consolidated tape on March 8,
 1999.

    At March 8, 1999, 32,290,859 shares of UniSource Energy Corporation 
 Common Stock, no par value (the only class of Common Stock), were 
 outstanding.

    UniSource Energy Corporation is the sole holder of the 32,162,167 shares
 of the outstanding Common Stock of Tucson Electric Power Company.

    Documents incorporated by reference: Specified portions of UniSource
 Energy Corporation's Proxy Statement relating to the 1999 Annual Meeting of
 Shareholders are incorporated by reference into PART III.
	
- ----------------------------------------------------------------------------

<PAGE>

          This combined Form 10-K is separately filed by UniSource Energy
          Corporation and Tucson Electric Power Company.  Information
          contained in this document relating to Tucson Electric Power
          Company is filed by UniSource Energy Corporation and separately by
          Tucson Electric Power Company on its own behalf.  Tucson Electric
          Power Company makes no representation as to information relating to
          UniSource Energy Corporation or its subsidiaries, except as it may
          relate to Tucson Electric Power Company.


                                   TABLE OF CONTENTS
                                                                        Page
                                                                        ----
          Definitions....................................................vi

                                      - PART I -
          Item 1. - Business
           The Company ...................................................1
           Regulated Electric Utility Operations
             Peak Demand .................................................3
             Customers ...................................................3
             Sales for Resale ............................................4
             Generating and Other Resources
               TEP Generating Resources ..................................5
               Springerville Station......................................5
               Irvington Station..........................................6
               Power Exchange Agreement ..................................7
               Other Purchases and Interconnections ......................7
               Future Generating Resources ...............................7
             Rates and Regulation
               General....................................................8
               ACC Holding Company Order..................................8
               1996 Rate Order............................................9
               Rate Settlement Agreement..................................9
               ACC Rules on Retail Competition............................9
               ACC Orders on Stranded Cost Recovery......................11
               State and Federal Legislation on Retail Competition.......13
               Wholesale Transmission Access.............................13
               Other Rate Matters........................................13
             Fuel Supply
               Coal......................................................14
               Springerville Coal Handling Facilities....................15
               Natural Gas...............................................15
             Water Supply ...............................................15
             Environmental Matters ......................................15
               Clean Air.................................................15
               Jointly-Owned Facilities..................................16
           Unregulated Energy Businesses ................................16
           Employees ....................................................18
           TEP Utility Operating Statistics .............................19
          Item 2. - Properties...........................................20
          Item 3. - Legal Proceedings
           Tax Assessments ..............................................21
           Litigation Related to ACC Orders and Competition .............21
          Item 4. - Submission of Matters to a Vote of Security Holders..21


                                   TABLE OF CONTENTS
                                      (continued)
                                                                        Page
                                                                        ----
                                      - PART II -

          Item 5. - Market for Registrant's Common Equity and Related
          Stockholder Matters
           UniSource Energy .............................................22
           TEP ..........................................................22

          Item 6. - Selected Consolidated Financial Data.................23

          Item 7. - Management's Discussion and Analysis of Financial
          Condition and Results of Operations
             Overview....................................................24
           Factors Affecting Results of Operations
             Competition
               Retail....................................................25
               Wholesale.................................................27
             Accounting for the Effects of Regulation ...................27
             Market Risks ...............................................28
             Impact of the Year 2000 on Computer Systems and Applications30
           Results of Operations ........................................32
             Contribution by Segment ....................................32
             Utility Sales and Revenues .................................32
             Fuel and Purchased Power Expense ...........................33
             Other Operating Expenses ...................................33
             Other Income (Deductions) ..................................34
             Interest Expense ...........................................34
             Results of Unregulated Energy Businesses ...................35
           Dividends on Common Stock
             UniSource Energy ...........................................36
             TEP ........................................................36
           Income Tax Position ..........................................37
           Liquidity and Capital Resources
             Cash Flows
               Overview of Consolidated Cash Flows and Liquidity.........37
               TEP Cash Flows and Liquidity..............................38
             Investing and Financing Activities
               TEP - Regulated Electric Utility
                    Capital Expenditures.................................38
                    Bond Issuance and Redemption.........................39
                    TEP Bank Credit Agreement............................40
                    Springerville Common Facilities Leases...............40
                    Tax-Exempt Local Furnishing Bonds....................41
                    Restrictive Covenants................................41
               Millennium - Unregulated Energy Businesses
                    Capital Requirements.................................43
               UniSource Energy - Parent Company Financing Activities
                    Promissory Note to TEP...............................43
                    Warrant Exchange Offer...............................43
                    Direct Stock Purchase Plan...........................44
                    Restrictions on Proceeds of Equity Issuance..........44
                    Loans and Guarantees.................................44
             Safe Harbor for Forward-Looking Statements .................45

          Item 7A. - Quantitative and Qualitative Disclosures about 
		   Market Risk.................................................. 45

                                   TABLE OF CONTENTS
                                      (continued)
                                                                        Page
                                                                        ----
          Item 8. - Consolidated Financial Statements and 
		   Supplementary Data............................................45
           Independent Auditors' Report .................................46
           Report of Independent Accountants ............................47
           UniSource Energy Corporation
             Consolidated Statements of Income ..........................48
             Consolidated Statements of Cash Flows ......................49
             Consolidated Balance Sheets ................................50
             Consolidated Statements of Capitalization ..................51
             Consolidated Statements of Changes in Stockholders' Equity .52
           Tucson Electric Power Company
             Consolidated Statements of Income ..........................53
             Consolidated Statements of Cash Flows ......................54
             Consolidated Balance Sheets ................................55
             Consolidated Statements of Capitalization ..................56
             Consolidated Statements of Changes in Stockholders' Equity .57
           Notes to Consolidated Financial Statements
           Note 1. Nature of Operations and Summary of Significant Accounting
            Policies
             Nature of Operations .......................................58
             Basis of Presentation ......................................58
             Use of Accounting Estimates ................................59
             Regulation .................................................59
             TEP Utility Plant ..........................................59
             TEP Utility Plant Under Capital Leases .....................59
             Springerville Unit 1 Allowance .............................60
             Long-Term Debt .............................................60
             Utility Operating Revenues .................................61
             Fuel Costs .................................................61
             Income Taxes ...............................................61
             Emission Allowances ........................................61
             New Accounting Standards ...................................61
             Reclassifications ..........................................62
           Note 2. TEP's Regulatory Assets and Liabilities
             Accounting for the Effects of Regulation ...................62
             Potential Discontinuation of Application of FAS 71 .........65
           Note 3. Rate Matters
             Rate Reduction .............................................67
             1996 Rate Order ............................................68
           Note 4. Segment and Related Information ......................68
           Note 5. Unregulated Energy Businesses ........................71
             International Power Projects - Nations Energy Corporation ..71
             Energy Marketing - MEH Corporation .........................72
             Photovoltaic Manufacturing - Advanced Energy 
			  Technologies, Inc. ........................................73
           Note 6. TEP's Utility Plant and Jointly-Owned Facilities
             Utility Plant ..............................................73
             Jointly-Owned Facilities ...................................74
           Note 7. TEP's Long-Term Debt and Capital Lease Obligations
             Long-Term Debt .............................................74
               Sale and Redemption of Bonds - 1998.......................74
               Sale and Redemption of Bonds - 1997.......................75
             Other Long-Term Debt and Agreements
               First and Second Mortgage.................................76
               Bank Credit Agreement.....................................76

                                   TABLE OF CONTENTS
                                      (concluded)
                                                                        Page
                                                                        ----
             Capital Lease Obligations ..................................76
             Maturities and Sinking Fund Requirements ...................77
           Note 8. Fair Value of TEP's Financial Instruments ............77
           Note 9. Dividend Limitations .................................78
           Note 10. Commitments and Contingencies
             TEP Commitments - Fuel Purchase ............................78
             Commitments-Environmental Regulation .......................79
             UniSource Energy Commitments - Energy Related Affiliates ...79
             Contingencies
               Ruling on Arizona Sales Tax Assessments - Coal Sales......79
               Arizona Sales Tax Assessments - Leases....................80
               Income Tax Assessments....................................80
           Note 11. Income Taxes ........................................81
           Note 12. Employee Benefits Plans
             Voluntary Severance Plan (VSP) .............................84
             Pension and Other Postretirement Benefit Plans .............84
             Defined Contribution Plans .................................86
             Stock Option Plans .........................................87
           Note 13. Warrants ............................................88
           Note 14. Shareholder Rights Plan .............................88
           Note 15. Supplemental Cash Flow Information ..................88
           Note 16. Earnings Per Share (EPS) ............................90
           Note 17. Quarterly Financial Data (Unaudited) ................92
           Financial Statement Schedules
             New Energy Ventures, Inc.
             Report and Consolidated Financial Statements
             December 31, 1998 and 1997..................................93
          
          Item 9. - Changes in and Disagreements with Accountants on
           Accounting and Financial Disclosure..........................113

                                     - PART III -

          Item 10. - Directors and Executive Officers of the Registrants
           Directors ...................................................113
           Executive Officers ..........................................113
          Item 11. - Executive Compensation.............................115
          Item 12. - Security Ownership of Certain Beneficial Owners and
           Management
           General .....................................................115
           Security Ownership of Certain Beneficial Owners .............115
           Security Ownership of Management ............................115
          Item 13. - Certain Relationships and Related Transactions.....115

                                     - PART IV -

          Item 14. - Exhibits, Financial Statement Schedules, and 
           Reports on Form 8-K..........................................116
           Signatures ..................................................117
           Exhibit Index ...............................................121



<PAGE>

                                  DEFINITIONS

      The abbreviations and acronyms used in the 1998 Form 10-K are
      defined below:
- -------------------------------------------------------------------------------

      ACC...............           Arizona Corporation Commission.
      AET...............           Advanced Energy Technologies, Inc., a 
	                                wholly-owned subsidiary of Millennium.
      Affected Utilities           Electric utilities regulated by the ACC,
                                    including TEP, Arizona Public Service,
                                    Citizens Utilities company, and several
                                    electric cooperatives.
      APS...............           Arizona Public Service Company.
      BTU...............           British Thermal Unit(s).
      CAAA..............           Federal Clean Air Act Amendments.
      Common Stock......           UniSource Energy's common stock, without 
                                    par value.
      Company or UniSource Energy  UniSource Energy Corporation.
      Credit Agreement..           Credit Agreement between TEP and the 
                                    banks, dated as of December 30, 1997.
      Emission Allowance(s)        An EPA issued allowance which permits
                                    emission of one ton of sulfur dioxide. 
                                    Such allowances can be sold.
      EPA...............           The Environmental Protection Agency.
      FAS 71............           Statement of Financial Accounting 
                                    Standards No. 71: Accounting for the 
                                    Effects of Certain Types of Regulation.
      FERC..............           Federal Energy Regulatory Commission.
      First Collateral Trust Bonds Bonds issued under the First
                                    Collateral Trust Indenture.
      First Collateral Trust 
       Indenture                   The Indenture, dated as of August 1, 
                                    1998, of Tucson Electric Power Company
                                    to Bank of Montreal Trust Company of
                                    the City of New York, as trustee.
      First Mortgage Bonds         First mortgage bonds issued under the 
                                    General First Mortgage.
      Four Corners......           Four Corners Generating Station.
      GAAP..............           Generally Accepted Accounting 
                                    Principles.
      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.
      General Second Mortgage      The Indenture, dated as of December 1,
                                    1992, of Tucson Electric Power Company
                                    to Bank of Montreal Trust Company of 
                                    the City of New York, as trustee, as 
                                    supplemented.
      Global Solar......           Global Solar Energy, L.L.C., a 
                                    corporation in which a 50% interest is
                                    owned by AET.
      Holding Company Act          The Public Utility Holding Company Act 
                                    of 1935, as amended.
      IDBs..............           Industrial development revenue or 
                                    pollution control revenue bonds.
      IRS...............           Internal Revenue Service.
      Irvington.........           Irvington Generating Station.
      Irvington Lease...           The leveraged lease arrangement relating
                                    to Irvington Unit 4.
      ISO...............           Independent System Operator.
      ITC...............           Investment tax credit.
      kW................           Kilowatt(s).
      kWh...............           Kilowatt-hour(s).
      kV................           Kilovolt(s).
      kVA...............           Kilovoltampere(s).
      LOC...............           Letter of Credit.
      MEH...............           MEH Corporation, a wholly-owned 
                                    subsidiary of Millennium.
      Millennium........           Millennium Energy Holdings, Inc., a 
                                    wholly-owned subsidiary of UniSource 
                                    Energy.
      MSR...............           Modesto, Santa Clara and Redding Public
                                    Power Agency.
      MW................           Megawatt(s).
      MWh...............           Megawatt-hour(s).



                                   DEFINITIONS
                                   (continued)


      Nations Energy....           Nations Energy Corporation, a wholly-
                                    owned subsidiary of Millennium.
      Navajo............           Navajo Generating Station.
      NEV...............           New Energy Ventures, Inc., a company 
                                    in which a 50% interest is owned by
                                    MEH.
      NEV Southwest.....           New Energy Ventures Southwest, L.L.C., a
                                    wholly-owned subsidiary of NEV.
      NEV Technologies..           NEV Technologies, a majority owned 
                                    subsidiary of NEV.
      NOL...............           Net Operating Loss carryforward for 
                                    income tax purposes.
      NTUA..............           Navajo Tribal Utility Authority.
      PNM...............           Public Service Company of New Mexico.
      Rate Settlement...           TEP's Rate Settlement agreement approved
                                    by the ACC in August 1998, which 
                                    provides retail base price decreases over
                                    a two-year period.
      Revolving Credit..           $100 million revolving credit facility 
                                    entered into under the Credit Agreement 
                                    between a syndicate of banks and TEP.
      San Carlos........           San Carlos Resources Inc., a wholly-
                                    owned subsidiary of TEP.
      San Juan..........           San Juan Generating Station.
      Second Mortgage Bonds        TEP's second mortgage bonds issued under
                                    the General Second Mortgage.
      SES...............           Southwest Energy Solutions, Inc., a 
                                    wholly-owned subsidiary of Millennium.
      Springerville.....           Springerville Generating Station.
      Springerville Coal Handling
        Facilities Leases          Leveraged lease arrangements relating
                                    to the coal handling facilities serving
                                    Springerville.
      Springerville Common
        Facilities......           Facilities at Springerville used in 
                                    common with Springerville Unit 1 and 
                                    Springerville Unit 2.
      Springerville Common
        Facilities Leases          Leveraged lease arrangements relating 
                                    to an undivided one-half interest in 
                                    certain Springerville Common 
                                    Facilities.
      Springerville Unit 1         Unit 1 of the Springerville Generating
                                    Station.
      Springerville Unit 1 Leases  Leveraged lease arrangement
                                    relating to Springerville Unit 1 and an
                                    undivided one-half interest in certain
                                    Springerville Common Facilities.
      Springerville Unit 2         Unit 2 of the Springerville Generating
                                    Station.
      SRP...............           Salt River Project Agricultural 
                                    Improvement and Power District.
      TEP...............           Tucson Electric Power Company, the 
                                    principal subsidiary of UniSource Energy.
      TEP Warrants......           Warrants for the purchase of TEP Common 
                                    Stock which were issued in 1992.
      UniSource Energy..           UniSource Energy Corporation.
      UniSource Energy Warrants    Warrants for the purchase of UniSource 
                                    Energy Common Stock which were issued
                                    in exchange for TEP Warrants, pursuant
                                    to an exchange offer which expired 
                                    October 23, 1998.
      VSP...............           Voluntary Severance Plan offered to TEP
                                    employees and implemented in May 1996.
      WSCC..............           Western Systems Coordinating Council.



<PAGE>

                               PART I

     This Annual Report on Form 10-K contains forward-looking statements 
as defined by the Private Securities Litigation Reform Act of 1995.  You 
should read forward-looking statements with the cautionary statements and
important factors included in this Form 10-K.  (See Item 7. - Management's 
Discussion and Analysis of Financial Condition and Results of Operations, 
Safe Harbor for Forward-Looking Statements.) Forward-looking statements 
include statements concerning plans, objectives, goals, strategies, future
events or performance and underlying assumptions.  Forward-looking
statements are not statements of historical facts.  Forward-looking
statements may be identified by the use of words such as anticipates, 
estimates, expects, intends, plans, predicts, and projects.  We express our
expectations, beliefs and projections in good faith and believe them to 
have a reasonable basis.  However, we cannot assure you that these 
expectations, beliefs or projections will be achieved or realized.


ITEM 1. BUSINESS
- ----------------------------------------------------------------------------
        
THE COMPANY
- -----------

Overview of Consolidated Business
- ---------------------------------

     UniSource Energy Corporation (UniSource Energy) is a holding company 
which owns all of the outstanding common stock of Tucson Electric Power 
Company (TEP) and Millennium Energy Holdings, Inc. (Millennium).  UniSource
Energy was incorporated in the State of Arizona on March 8, 1995 and 
obtained approval to form a holding company in November 1997.  On January
1, 1998, TEP and UniSource Energy completed a transaction by which all 
outstanding shares of TEP common stock were exchanged, on a share-for-share
basis, for shares of UniSource Energy common stock.  Following the share
exchange, TEP transferred the stock of its subsidiary, MEH Corporation, to 
UniSource Energy in exchange for a $95 million promissory note.  (See Note
1 of Notes to Consolidated Financial Statements).  MEH Corporation 
subsequently changed its name to Millennium Energy Holdings, Inc. on 
November 20, 1998.

     We conduct our business in two primary business segments--the
Regulated Electric Utility Segment (TEP), and our Unregulated Energy
Businesses Segment comprised of the subsidiaries owned by Millennium.

Overview of Regulated Electric Utility
- --------------------------------------

     TEP was incorporated in the State of Arizona on December 16,1963.  
TEP is the successor by merger as of February 20, 1964, to a Colorado 
corporation which was incorporated on January 25, 1902.  It is an 
operating public utility which generates, purchases, transmits, 
distributes and sells electricity to over 320,000 retail customers and 
to wholesale customers.  TEP's retail service territory consists of a 
1,155 square mile area of Southeastern Arizona with a population of 
approximately 800,000 in the greater Tucson metropolitan area in Pima 
County, as well as parts of Cochise County.  TEP holds a franchise to 
provide electric service to customers in the City of Tucson.  This 
franchise expires in 2001.

     TEP owns all of the outstanding stock of San Carlos Resources Inc. 
(San Carlos), which owns Springerville Unit 2.

     We describe our regulated electric utility business further in the 
Regulated Electric Utility Operations and Utility Operating Statistics 
sections.

Overview of Unregulated Energy Businesses
- -----------------------------------------

     Millennium owns 100% of the common stock of four subsidiaries.
We established these subsidiaries to pursue various unregulated
energy-related investment opportunities:

     (i)   Nations Energy Corporation (Nations Energy) develops
           independent power projects.
     (ii)  MEH Corporation (MEH) holds a 50% interest in New
           Energy Ventures, Inc. (NEV).  NEV purchases 
           electricity on behalf of, and provides electric load
           aggregation, energy management and advisory services
           to, retail purchasers of electric energy.
     (iii) Advanced Energy Technologies, Inc. (AET) holds a
           50% interest in Global Solar Energy, L.L.C. (Global
           Solar), a manufacturer of thin-film photovoltaic 
           cells.
     (iv)  Southwest Energy Solutions, Inc. (SES) provides
           energy support services to electric consumers.

     We describe our Unregulated Energy Businesses in more detail in
the Unregulated Energy Businesses section.

Competition and Response to Regulatory Change
- ---------------------------------------------

     The electric utility industry is facing significant regulatory
change designed to encourage competition in the sale of certain electric 
services.  We continually evaluate our position to develop strategies to 
remain competitive in this changing environment.  In November 1998, TEP 
realigned its regulated utility business into three separate business 
units: generation, transmission and distribution, and in January 1999, 
we formed a business unit which provides administrative services to the 
utility business units.  We may pursue other strategies in the future 
which include one or more of the following:

     --  creation of separate affiliates for our generation,
         transmission and distribution businesses,
     --  sale of generation assets,
     --  acquisition of transmission assets,
     --  growth of revenues from unregulated energy businesses, and
     --  investments by unaffiliated parties in, or sales of portions
         of, our unregulated energy businesses.

     We cannot predict whether any transactions of the types described 
above may actually occur, nor can we predict what their effect on our 
financial condition or competitive position might be.  We discuss 
competition in our regulated electric utility business in more detail 
in Rates and Regulatory Matters and in Item 7. Management's Discussion 
and Analysis of Financial Condition and Results of Operations, Competition.


<PAGE>

REGULATED ELECTRIC UTILITY OPERATIONS
- -------------------------------------

PEAK DEMAND

<TABLE>
<CAPTION>

Peak Demand                          1998    1997    1996    1995    1994
                                     ----    ----    ----    ----    ---- 
                                                     - MW -
<S>                                  <C>     <C>     <C>     <C>     <C>
Retail Customers-Net One Hour       1,786   1,659   1,619    1,617   1,585
Firm Sales to Other Utilities         179     177     177      223     226
                                    -----   -----   -----    -----   -----
  Non-Coincident Peak Demand  (A)   1,965   1,836   1,796    1,840   1,811

Total Generating Resources          1,896   1,992   1,952    1,952   1,952
Other Resources                       235     235     133      133      23
                                    -----   -----   -----    -----   -----
  Total TEP Resources  (B)          2,131   2,227   2,085    2,085   1,975

Total Reserves  (B) - (A)             166     391     289      245     164 
Reserve Margin (% of Non-Coincident
Peak Demand)                            8%     21%     16%      13%      9%

</TABLE>

- ----------------------------------------------------------------------------
        
      The peak demand for TEP's retail service area occurs during the summer
months due to the cooling requirements of our retail customers.  TEP's peak
demand has grown at an average annual rate of about 3.3% during the past five
years.  The peak demand for firm sales to other utilities generally does not
coincide with TEP's retail peak demand.

     The chart above shows the relationship over a five-year period between
TEP's peak demand and its energy resources.  In addition to TEP's generating
resources, total resources include firm capacity purchases and interruptible
retail load.  TEP's reserves are the difference between energy resources and
peak demand, and the reserve margin is the ratio of reserves to peak demand.
TEP seeks to maintain a planning reserve margin in accordance with guidelines
set by the WSCC equal to its largest single hazard plus 5% of its non-
coincident peak demand.  For 1998, this targeted reserve margin equaled 310
MW or 16% of non-coincident peak demand.  TEP's actual reserve margin in 1998
was 8%, compared with 21% in 1997.  The lower actual reserve margin in 1998
resulted from a combination of retail load growth and the expiration of a
lease on 96 MW of combustion turbines.  TEP purchased additional firm energy
as needed to ensure it had adequate operating reserve margins throughout the
year in accordance with the operating requirements of the Southwest Reserve
Sharing Group.

     TEP expects to meet near-term demand growth with existing resources,
purchases, and additional resources as discussed in Future Generating
Resources below.  See TEP Generating Resources and Rates and Regulation, ACC
Rules on Retail Competition about the impact of retail competition on our
need for new resources.

CUSTOMERS

     The average number of TEP's retail customers increased by 2.2% in 1998
to 320,744.  TEP expects the number of its retail distribution customers, and
the amount of energy consumed by those customers, each to grow at an average
annual rate of approximately 2.0% through 2003.  Retail peak demand in TEP's
service territory is expected to grow by about 2.5% annually over the same
period.  TEP expects energy consumed by its residential, commercial, non-
mining industrial and mining customers to comprise 35%, 17%, 28% and 16%,
respectively, of total energy consumption during that period.

     TEP uses population and demographic studies conducted by unrelated
parties to forecast the growth in the number of customers, peak demand, and
retail sales.  TEP also uses assumptions about the weather, the economy, and
competitive conditions.  The forecasts do not take into account the source or
price of energy.

     Certain of TEP's retail customers will be eligible to choose alternative
energy providers when retail competition takes effect in Arizona.  See ACC
Rules on Retail Competition for a discussion of these customers and the
proposed competition phase-in period.  Even if a portion of TEP's retail
customers choose other energy suppliers, the forecasted growth rates in the
number of customers referred to above would continue to apply to TEP's
distribution business.


     Sales to Large Industrial Customers

     TEP provides electric utility service to a diversified group of
commercial, industrial, and public sector customers.  Major industries served
include copper mining, defense, health care, education and governmental
entities.  TEP's two largest retail customers are in the copper mining
industry.  In 1998, sales to these customers totaled about 16% of TEP's total
retail energy sales, and their contract demands totaled approximately 11% of
the 1998 retail peak demand.  Revenues from sales to mining customers
accounted for approximately 8% of TEP's retail revenues in 1998 and 9% in
1997 and 1996.  Sales to mining customers are expected to grow at an annual
rate of about 0.7% over the next five years.  Sales to mining customers
depend on a variety of factors including changes in supply and demand factors
in the world copper market and the economics of self-generation.  During
1998, market prices for copper were at eleven-year lows, causing our mining
customers to reduce workforces and/or redesign work processes to reduce load.
Should copper prices continue at these levels, TEP may experience lower sales
to and lower revenues from mining customers.

     TEP has contracts with its two principal mining customers to provide
them electric power at special rates.  The special rates are designed to
induce the mines to continue to purchase electricity from TEP rather than
from other sources.  These contracts expire between 2001 and 2003.  However,
the contracts include provisions allowing the mines to cancel some or all of
their contract under certain circumstances, provided that they notify TEP at
least one, and up to two years, prior to such termination, and in some cases,
pay termination fees to TEP.  To date, TEP has not received any termination
notices.  Whether these contracts are extended or terminated will depend, in
part, on market conditions and available alternatives.

   SALES FOR RESALE

     TEP's electric utility operations include the wholesale marketing of
electricity to other utilities and power marketers.  These transactions,
termed sales for resale, are made on both a firm basis and an interruptible
basis.  A firm basis means that contractually, TEP must supply the power
(except under limited emergency circumstances), while an interruptible basis
means that TEP may stop supplying power under various circumstances.  See
Other Purchases and Interconnections.

     TEP's sales for resale consist primarily of three types of sales, which
are listed below, along with the percentage contribution to total sales for
resale in 1998:

   --  sales of firm capacity under long-term contracts (31%);
   --  forward contracts to sell energy for periods of up to one year (34%),
       and
   --  sales of excess generation in the hourly markets (31%).

KWh sales for resale increased by 31% in 1998 while revenues from these sales
grew by 47%.  This increase in both sales and revenues was mainly due to
increased trading activity in the forward markets.  See Item 7. Management's
Discussion and Analysis of Financial Condition and Results of Operations, 
Market Risks, for a discussion of TEP's energy trading activities.

     TEP currently has long-term contracts to sell firm capacity as follows:

<TABLE>
<CAPTION>
                          Minimum
                          Contract
Company                  Demand MW   Contract Term
- -------                  ---------   --------------
<S>                       <C>        <C>
Salt River Project          100       June 1, 1991 - May 31, 2011
NTUA (Phase I) (1)           60       July 1, 1997 - May 31, 1999
NTUA (Phase II) (1)        40/50      June 1, 1999 - December 31, 2009
City of Farmington (2)       25       November 1, 1997- February 29, 2000 

</TABLE>
- --------------
(1)  Phase I provides for a minimum demand of 60 MW during the contract 
period.  During Phase II, TEP will provide 40 MW of firm power in the 
summer months (May - September) and 50 MW of firm power in the winter 
months (October - April).
(2)  The City of Farmington, New Mexico will purchase up to 25 MW of 
firm power from November to February.

     TEP cannot predict whether the contracts described above will be
replaced or extended in the future.

     We expect strong competition to sell capacity and energy to continue 
during the next few years due to:

     --  surplus generating capacity in the Southwestern United
         States;
     --  restructuring of the electric utility industry in
         California and other western states;
     --  an active spot market in the Western United States.

See Item 7. Management's Discussion and Analysis of Financial Condition 
and Results of Operation, Competition, Wholesale.


  GENERATING AND OTHER RESOURCES
  ------------------------------

    TEP GENERATING RESOURCES

    At December 31, 1998, TEP owned or leased 1,896 MW of net generating 
capability as set forth in the following table:


<TABLE>
<CAPTION>
                                                                  Net       Oper-   TEP's Share
                              Unit                        Owned/  Capabil-  ating   ---------           
Generating Source      No.  Location           Fuel Type  Leased  ity MW    Agent    %     MW
- -----------------      ---  --------           ---------  ------  --------  ------  --     --
<S>                    <C>  <C>                <C>        <C>     <C>       <C>     <C>    <C>
Springerville Station   1    Springerville, AZ  Coal       Leased  380      TEP     100.0  380
Springerville Station   2    Springerville, AZ  Coal       Owned   380      TEP     100.0  380
San Juan Station        1    Farmington, NM     Coal       Owned   316      PNM      50.0  158
San Juan Station        2    Farmington, NM     Coal       Owned   312      PNM      50.0  156
Navajo Station          1    Page, AZ           Coal       Owned   750      SRP       7.5   56
Navajo Station          2    Page, AZ           Coal       Owned   750      SRP       7.5   56
Navajo Station          3    Page, AZ           Coal       Owned   750      SRP       7.5   56
Four Corners Station    4    Farmington, NM     Coal       Owned   784      APS       7.0   55
Four Corners Station    5    Farmington, NM     Coal       Owned   784      APS       7.0   55
Irvington Station       1    Tucson, AZ         Gas/Oil    Owned    81      TEP     100.0   81
Irvington Station       2    Tucson, AZ         Gas/Oil    Owned    81      TEP     100.0   81
Irvington Station       3    Tucson, AZ         Gas/Oil    Owned   104      TEP     100.0  104 
Irvington Station       4    Tucson, AZ         Coal/Gas   Leased  156      TEP     100.0  156 
Internal Combustion 
  Turbines                   Tucson, AZ         Gas/Oil    Owned   122      TEP     100.0  122 
                                                                                           ----  
Total Company Capacity (1)                                                                1,896
- -----------------------------------                                                       =====
</TABLE>              

(1)Excludes 235 MW of additional resources, which consists of certain 
capacity purchases and interruptible retail load.  At December 31, 1998,
total owned capacity was 1,360 MW and leased capacity was 536 MW.

     TEP is the operator of the Springerville and Irvington Generating 
Stations, which are wholly-owned or leased by TEP.  TEP has ownership 
interests in the San Juan, Navajo and Four Corners Generating Stations, 
which are operated by others.  We provide additional information below on 
those units operated by TEP, including details on the capital lease 
obligations for Springerville Unit 1, Springerville Common Facilities, 
and Irvington Unit 4.

     Springerville Station

     The Springerville Station, located in northeast Arizona, consists of 
two coal-fired units.  Springerville Unit 1 began commercial operation in 
1985 and is leased and operated by TEP.  Springerville Unit 2 started 
commercial operation in June 1990 and is owned by San Carlos and operated 
by TEP.  These units may be operated for up to eight hours at a net 
capacity of 400 MW each.

     The initial terms of the Springerville Unit 1 Leases, which includes 
a 50% interest in the Springerville Common Facilities, expire on January 1,
2015.  At the end of the initial terms, TEP may exercise fair market value 
purchase and renewal options.  At December 31, 1998, the capitalized lease 
asset related to Springerville Unit 1, net of allowance and accumulated 
amortization, was $234 million, or $616 per kW based on the current 380 MW
capacity rating.

     The annual cash cost of lease payments for the Springerville Unit 1 
Leases will range from $33 million to $176 million, averaging approximately
$80 million. In 1998, the cash cost attributable to rent obligations and 
other operations and maintenance expenses was $75 million, or an average of
$16 per kW per month based on a 380 MW capacity rating.  The average cash 
cost is estimated to be about $99 million per year or $22 per kW per month 
for the period from January 1999 through December 2003.  The average cash 
cost will increase in periods after 2003. Due to timing differences between
cash and accrued expenses, TEP's cash cost of Springerville Unit 1 capacity
attributable to rent obligations and other operation and maintenance
expenses will differ from the amounts accrued in TEP's financial statements.

     The expenses accrued in TEP's financial statements during 1998
were $92 million or an average of $20 per kW per month, before amortization
of the regulatory allowance and related interest expense.  The estimated 
expense is expected to average $98 million per year or $21 per kW per month
for the period from January 1999 through December 2003 and is expected to 
increase slightly thereafter.  See Springerville Unit 1 Allowance in Note 1
of Notes to Consolidated Financial Statements for additional information on
accounting for Springerville Unit 1.

     In December 1985, TEP sold and leased back a 50% interest in the 
Springerville Common Facilities.  The initial lease term for the 
Springerville Common Facilities Leases expires in 2017 for one owner
participant and 2021 for the other two owner participants, subject
to optional fair market value renewal and purchase options.  The sales price
of these facilities was $132 million.  At December 31, 1998, the capitalized
lease asset related to this interest in the Springerville Common Facilities,
net of accumulated amortization, was $117 million. Annual lease payments 
under these leases vary with changes in the interest rate on the underlying
debt.  These lease payments totaled about $12 million per year in 1998, 
1997 and 1996.  TEP plans to cause the underlying debt on these leases to be
refinanced in 1999 (see Investing and Financing Activities).  Based on an 
assumed interest rate of 8%, average annual lease payments would total 
approximately $12 million.

     Including one-half of the cost of the Springerville Common Facilities 
(but excluding the cost of coal-handling facilities at Springerville which 
were included in recoverable fuel costs), the total initial cost of 
Springerville Unit 2 was $838 million, or $2,328 per kW based on the 
previous 360 MW capacity rating.  In a 1991 rate order, the ACC disallowed 
recovery from retail customers of $175 million of the book value of 
Springerville Unit 2.  TEP recorded a loss for such disallowance in 1991.  
The net recoverable cost, including the leased common facilities, is $663 
million or $1,842 per kW based on the previous 360 MW capacity rating (or
$1,745 per kW based on the current 380 MW capacity rating).

     See Fuel Supply, Springerville Coal Handling Facilities, for
information regarding the Springerville Coal Handling Facilities Leases.

     Irvington Station

     Irvington is a four-unit generating station located in Tucson,
AZ.  Units 1, 2, and 3 are gas or oil burning units.  In January 1988, TEP 
began coal-fired commercial operation of Irvington Unit 4.  The unit was
sold at its cost of $152 million and leased back under the Irvington Lease.
At December 31, 1998, the capitalized lease asset for Irvington Unit 4, net
of accumulated amortization, was $106 million.  Annual lease payments range
from approximately $11 million to $14 million and average about $13 million.
The initial lease term expires in 2011, but the lease has optional fair 
market value renewal and purchase option provisions.

     Irvington Unit 4 (156 MW capability) has the flexibility to operate on
coal or gas.  Coal has been the primary fuel and natural gas the secondary 
fuel.

  POWER EXCHANGE AGREEMENT

     As part of a 1992 litigation settlement, TEP and Southern California 
Edison (SCE) agreed to a ten-year power exchange agreement.  The agreement
began in May 1995 and requires SCE to provide firm system capacity of 
110 MW to TEP during summer months.  TEP pays an annual charge of 
approximately $1 million, increasing annually after the year 2000, to a 
maximum of approximately $2 million annually for this agreement.  TEP is 
entitled to schedule firm energy deliveries from SCE during the summer (May
15 to September 15) of up to 36,300 MWh per month, and is obligated to
return to SCE on an interruptible basis the same amount of energy the 
following winter season (November 1 to February 28).  The energy provided 
under the exchange is expensed based on the estimated cost of interruptible
energy to be provided to SCE.  Under this exchange agreement, TEP received
100,735 MWh from SCE in 1998, and returned 39,082 MWh to SCE as of December
31, 1998.

  OTHER PURCHASES AND INTERCONNECTIONS

     TEP participates in a number of interchange agreements by which it can
purchase additional electric energy from other utilities.  The amount of 
energy purchased from other utilities and power marketers varies 
substantially from time to time depending on demand for energy, cost of 
purchased energy compared with TEP's cost of generating energy, and the 
availability of such energy. TEP may also sell its surplus electric energy 
through these agreements.  See also Item 7. Management's Discussion and 
Analysis of Financial Condition and Results of Operations, Market Risks.

     TEP has transmission access and power transaction arrangements
with over 180 electric systems or suppliers, including the California Power
Exchange.  TEP is a member of the following organizations:

     --  Southwest Reserve Sharing Group - A group of utilities serving
         customers in portions of the southwestern United States.  The group
         provides emergency assistance and reserve sharing among members to
         enhance system reliability in the Southwest region.
     --  Western Systems Coordinating Council (WSCC) - A group of western
         electric systems and suppliers working cooperatively to assure the
         reliability of the region's interconnected generation and
         transmission systems.
     --  Western Systems Power Pool - A voluntary power pooling
         arrangement designed to achieve more efficient use of electric
         generation and transmission facilities among its members.

     See Rates and Regulation, FERC Orders on Wholesale Transmission
Access for a discussion of possible changes in transmission issues.


  FUTURE GENERATING RESOURCES

     In the past, TEP assessed its need for future generating resources 
based on the premise of a continued regulatory requirement to serve 
customers in TEP's retail service area.  However, the obligation to serve 
all customers will likely be modified by the ACC's rules on retail 
competition.  Further, the need for future resources will be affected by 
these rules and TEP's ability to retain and attract customers.  Under the 
Retail Competition Rules as adopted, some of TEP's retail customers will be
eligible to choose alternative energy providers when retail competition is 
introduced.  For those customers who do not or cannot choose other energy
providers, TEP remains obligated to provide energy.  However, this energy 
is not required to come from TEP-owned generating assets.  See Rates and 
Regulation, ACC Rules on Retail Competition below and Item 7. - Management's
Discussion and Analysis of Financial Condition and Results of Operations,
Competition.

     Regardless of who supplies electric power in TEP's retail service area,
TEP has identified the need for additional peaking resources in 2001, which
must be located in the Tucson service area to reliably serve the needs of 
the area.  Therefore, in the first quarter of 1999, TEP issued a request 
for proposals to provide 75 MW of peaking resources to be located in TEP's 
service territory.  The request for proposals contemplates purchasing 
peaking capacity on an as needed basis through a Must-Run Generation 
contract.  Must-run generating units are those which are required to run in
order to maintain distribution system reliability and meet load 
requirements.


RATES AND REGULATION
- --------------------

  GENERAL

     TEP is regulated by the FERC and by the ACC.  The FERC regulates the 
terms and prices of TEP's sales to other utilities.  The ACC has authority 
over rates charged to retail customers, accounting classifications, and the
issuance of securities.  The ACC also has authority to approve affiliate 
transactions and establish holding companies and subsidiaries under its 
Affiliated Interest Rules.
        
     The ACC consists of three commissioners, each serving a six-year term.
One of the three is elected at each general election.  Commissioners cannot
serve consecutive terms and can be elected to another term only after the 
passing of six years after the end of their previous term as commissioners.
The present commissioners are:

     --  Jim Irvin (Republican), Chairman, started his first term in
         1997.  His term expires in 2003.
     --  Carl J. Kunasek (Republican), began his first term in 1995.
         His term expires in 2001.
     --  Tony West (Republican), started his first term in 1999.  His
         term expires in 2005.

     The ACC determines TEP's rates for retail sales of electric energy on 
a "cost of service" basis, which is designed to provide, after recovery of 
allowable operating expenses, an opportunity to earn a reasonable rate of 
return on "fair value rate base".  Fair value rate base is generally 
determined by reference to the original cost and the reproduction cost (in 
each case, net of depreciation) of utility plant in service to the extent 
deemed used and useful, and to various adjustments for deferred taxes and 
other items, plus a working capital component.  Over time, rate base is 
increased by additions to utility plant in service and reduced by 
depreciation and retirements of utility plant.

     When retail electric competition takes effect, the ACC will require 
unbundling of charges, with separate rates for all services, such as 
generation, transmission, distribution, metering, meter reading, billing 
and collection, and ancillary services.  At that time, some of these charges
will be priced at market rates instead of cost of service levels.  See 
ACC Rules on Retail Competition below.

     The FERC regulates TEP's rates for wholesale power sales and 
transmission services.  In general, these rates may not exceed rates
determined on a cost of service basis.  In the fall of 1997, TEP was
granted a tariff to sell at market based rates.  The FERC has historically 
set rates in formal rate application proceedings.  With respect to new 
wholesale power sales, TEP's wholesale rates are generally substantially 
below rates determined on a fully allocated cost of service basis, but, in 
all instances, rates exceed the level necessary to recover fuel and other 
variable costs.

  ACC HOLDING COMPANY ORDER

     In November 1997, the ACC allowed TEP to form a holding company.  On 
January 1, 1998, TEP and UniSource Energy completed a transaction by which 
all outstanding shares of TEP common stock were exchanged, on a share-for-
share basis, for shares of UniSource Energy common stock.  As a result of 
the transaction, TEP became a wholly-owned subsidiary of UniSource Energy.

     The ACC order approving the holding company contained a number
of conditions which impact the activities of UniSource Energy, TEP, and 
TEP's sister companies (i.e., other companies owned by UniSource Energy or 
its affiliates).  These include:

      --  UniSource Energy and its subsidiaries will only conduct
          business activities that are part of the electric energy business
          (as defined in the order).
      --  During its first five years of operations, UniSource Energy
          must provide to TEP: (i) 60% of the proceeds of any public equity
          issuance by UniSource Energy; and (ii) 2% of the net after-tax
          profits attributable to its equity interest in TEP's sister
          companies.  TEP will use the proceeds to reduce debt or add to
          its equity accounts.
      --  TEP may not pay dividends to UniSource Energy in excess of
          75% of its earnings until TEP's equity ratio equals 37.5% of
          total capital (excluding capital lease obligations).
      --  TEP will target a 37.5% equity ratio (excluding capital lease
          obligations) in its capitalization structure for regulatory
          purposes by December 31, 2000.  If TEP does not attain that goal,
          the ACC may set rates based on TEP's actual capital structure for
          regulatory purposes rather than the hypothetical 37.5% equity
          ratio currently reflected in rates.
      --  The capitalization (debt and equity) of TEP's sister
          companies may not exceed 30% of TEP's capitalization unless
          otherwise approved by the ACC.

  1996 RATE ORDER

     In March 1996, the ACC approved a rate increase for TEP of 1.1%
(approximately $6.4 million annually).  The 1996 Rate Order recognized all 
of Springerville Unit 2 as used and useful for ratemaking purposes.  This 
allowed TEP to recover the operating and capital costs associated with that
portion of the generating unit not previously included in rates.  See Notes
2 and 3 of the Notes to Consolidated Financial Statements, Deferred 
Springerville Generation Costs, and Rate Matters.  Under the 1996 Rate 
Order, TEP cannot seek a base rate increase before January 1, 2000, except 
under limited circumstances.

     The rates approved in the 1996 Rate Order are based on a rate
of return of 6.59% on a fair value rate base of approximately $1.36 billion,
or 7.72% on an original cost rate base of approximately $1.16 billion.  The
capital structure adopted by the ACC for ratemaking purposes assumes 62.5% 
debt and 37.5% equity.  Consistent with previous ACC rate orders, TEP's 
leasehold interest in utility plant was reflected in rates through an 
allowance for rental expense, and was therefore not included in rate base.

  RATE SETTLEMENT AGREEMENT

     On August 25, 1998, the ACC approved a rate settlement
agreement (Rate Settlement) which gives TEP's retail customers the
following base price decreases:

      --  an initial 1.1% decrease (about $7.0 million) which was
          effective July 1, 1998;
      --  a second decrease of 1.0% (about $5.5 million) on July 1,
          1999; and
      --  an additional 1.0% decrease (about $5.5 million) on July 1,
          2000.

The latter two decreases will apply to all tariffed retail customers
prior to the start of competition and to all Standard Offer Electric
Service customers who do not have, or do not choose, access to
competing electric service providers during the proposed two-year
phase-in of the ACC's Electric Competition Rules.  The Rate
Settlement meets the requirement in the ACC's Electric Competition
Rules for a 3-5% rate reduction.  TEP cannot predict when these
rules will take effect.  See Competition, Retail.

     The Rate Settlement resolved TEP's application for a price
decrease in its Shared Savings Proposal filed with the ACC on July 9, 1997.
This settlement also allows TEP to mitigate certain potentially stranded 
costs by decreasing the recovery period for Retail Excess Capacity 
Deferrals.  See Note 3 of Notes to the Consolidated Financial Statements, 
Rate Matters.

     The Rate Settlement also affirmed an interim accounting order
issued by the ACC in July 1997.  That order authorized TEP to record
a $50 million coal contract termination fee as a deferred regulatory
asset and to amortize that asset by $4 million per year over
approximately 13 years.  At December 31, 1998, $44 million of this
regulatory asset remained unamortized.  TEP incurred this fee when it 
terminated a coal supply contract for the Springerville Generating Station 
and negotiated a new coal contract which reduced TEP's annual fuel bill 
initially by approximately $10 million.

  ACC RULES ON RETAIL COMPETITION

     In December 1996, the ACC adopted rules that provided a framework 
for the phase-in of retail electric competition in Arizona beginning in 
January 1999.  The rules, as well as other ACC orders, contain references 
to the Affected Utilities.  These are the utilities, including TEP, which
are regulated by the ACC.  These rules were amended and adopted on an 
emergency basis in August 1998.  In January 1999, the ACC delayed the 
implementation of the rules pending additional proceedings to resolve a 
number of important issues.

     The rules, as adopted, assumed a competition start date of
January 1, 1999.  We cannot predict the actual date that competition
will begin in Arizona, or the final form of the rules.  The key
provisions of the rules, as amended, include the following:

     --  Each Affected Utility shall make available at least 20% of its
         1995 system retail peak demand for competitive generation supply
         on a first-come, first-served basis, as follows:
         --  All Affected Utility customers with non-coincident peak
             demand load of 1 MW or greater will be eligible for
             competitive electric services when competition starts.
         --  Groups of Affected Utility customers with individual non-
             coincident peak load demands of 40 kW or greater aggregated
             into a combined load of 1 MW or greater will also be eligible
             for competitive service when competition starts.
         --  Each Affected Utility shall also offer a residential
             phase-in program when competition starts.  A minimum of 1 1/4%
             of residential customers per quarter, calculated beginning
             January 1, 1999, will be eligible to participate.  All retail
             customers shall be entitled to obtain competitive electric
             services no later than January 1, 2001.

         TEP currently serves about 80 customers who qualify under the 1 MW
         or greater category described above, representing 351 MW of load.
         Of this load, 60% is under contract through 2001.

     --  Each Affected Utility shall make available to all customers in
         its service territory Standard Offer bundled generation,
         transmission, ancillary, distribution and other necessary services
         at regulated rates.  After January 1, 2001, Standard Offer service
         shall be provided by the Affected Utilities, which will be known
         as Utility Distribution Companies (UDCs), who shall also act as
         energy providers of last resort.
     --  Each Affected Utility shall file a report detailing possible
         mechanisms to provide benefits, such as rate reductions of 3% -
         5%, to all Standard Offer customers.  TEP met this requirement in
         August 1998 when it reached a Rate Settlement Agreement with the
         ACC.  See Rates and Regulation, Rate Settlement Agreement.
     --  The Affected Utilities shall provide non-discriminatory open
         access to transmission and distribution facilities to serve all
         customers.  The ACC supports the development of an Independent
         System Operator (ISO) or, absent an ISO, an Independent Scheduling
         Administrator (ISA).
     --  All competitive generation assets and services shall be
         separated from an Affected Utility prior to January 1, 2001.  Such
         separation shall either be to an unaffiliated party or to a
         separate corporate affiliate or affiliates.  If an Affected
         Utility chooses to transfer its competitive generation assets or
         competitive services to a competitive electric affiliate, such
         transfer shall be at a value determined by the ACC to be fair and
         reasonable.
     --  The ACC shall allow the Affected Utilities a reasonable
         opportunity for recovery of unmitigated stranded costs.  See
         ACC Orders on Stranded Cost Recovery below for a discussion of a 
         subsequent ACC order and TEP's filing on this topic.

     On February 5, 1999, the ACC Hearing Officer issued a Proposed
Opinion and Order recommending changes to the Rules.  These
recommendations include:

     --  The date to open an Affected Utility's service territory to
         competition would be set upon the resolution its of Stranded Costs
         and Unbundled Tariffs by final ACC order.
     --  If an Affected Utility's service territory is open prior to
         January 1, 2001, the existing phase-in schedule is retained,
         calling for 20 percent of the market to initially have access to
         competitive generation supply.  As part of the 20 percent, each
         Affected Utility is to reserve an increasing percentage for
         residential customers according to a set schedule.
     --  Competitive Energy Service Provider affiliates of Affected
         Utilities may not enter another Affected Utility's service
         territory until its own territory is open to competition.
     --  The requirement for energy generated from solar sources was
         eliminated, citing it as prohibitively expensive and potentially
         hindering competition in Arizona.
     --  Affected Utilities will have an opportunity to amend their
         tariffs for unbundled noncompetitive services with the ACC.

     TEP filed exceptions to the Proposed Order on February 17, 1999.  
No meeting date has yet been set to consider this Proposed Order.  If the 
Proposed Order amending the Rules is adopted, it will be forwarded to the 
Secretary of State to start the amendment process.  The Arizona 
Administrative Procedures Act requires that the Rules be filed with the 
Secretary of State before they can be amended.  We anticipate that the 
stay of the Rules would probably remain in effect until amendments are 
adopted.

     Appeal of ACC Order

     In February 1997, TEP filed in the Arizona Superior Court an appeal of
the ACC order adopting the rules. TEP filed a motion for summary judgment,
claiming, among other things that the Competition Rules: (a) violated the 
Regulatory Compact between TEP and the State of Arizona; (b) confiscated 
TEP's property; and (c) violated due process.  The Court did not grant 
summary judgment but ruled that the ACC must hold hearings before it can 
modify TEP's Certificate of Convenience and Necessity (CC&N).  No trial 
date has been set in the case and no final order has been issued.  We 
are unable to predict the outcome of the appeal.

  ACC ORDERS ON STRANDED COST RECOVERY

     June 1998 Order

     On June 22, 1998, the ACC adopted an order outlining its policy
for stranded cost recovery by Arizona utilities in a competitive energy 
market.  The order required Affected Utilities to choose from one of two 
methods for stranded cost recovery by August 21, 1998.  Stranded costs 
represent costs recoverable by a utility in a regulated market that would
not likely be recovered through the prices charged for electricity and 
other services in a competitive  market.  The two options were:

     (1)  Divestiture/Auction Methodology
      --  This method would require the sale of all electric
          generation assets through auction by January 1, 2001.
      --  Stranded costs would be calculated as the difference
          between book value of generation assets (including related
          regulatory assets) and the proceeds of the sale.
      --  100% of stranded costs, including a return on the
          unamortized balance, would be recovered over a ten-year
          period.
      --  The ACC would work with the Affected Utility to provide
          sufficient assurances in order to avoid triggering write-offs
          related to the application of FAS 71.
      --  All customers of Affected Utilities would pay for the
          stranded costs.

     (2)  Transition Revenues Methodology
      --  The ACC would determine the revenues necessary to maintain
          financial integrity (such as avoiding default under currently
          existing financial instruments).
      --  Affected Utilities would recover the determined amount of
          stranded costs for a period of ten years.

     The order encouraged, but did not require, full divestiture of
generating assets through an auction to unaffiliated third parties.
The order stated that only those Affected Utilities choosing
divestiture through the Divestiture/Auction Methodology would have
the opportunity to recover 100% of unmitigated stranded costs.  The
order also specified that some form of rate cap would be in place
for customers on Standard Offer electric service during the
transition period.

     TEP's Stranded Cost Recovery Plan

     Pursuant to the June 1998 Order, TEP filed a proposed plan for
divestiture of generating assets and stranded cost recovery with the
ACC on August 21, 1998.  For a description of TEP's generation
properties, see TEP Generating Resources.  The net book value of TEP's 
generating plant assets (including assets held under capitalized leases) 
was approximately $1.3 billion at December 31, 1998.  TEP estimated its 
stranded costs may range from $600 million to $1.1 billion.  TEP proposed
to recover stranded costs and a return on any unamortized balance over 
a ten-year period ending December 31, 2008.

     Some of TEP's generating assets are held under lease.  These
leases are terminable or assignable only under limited circumstances.  
If TEP were to divest its generating assets, it would seek to negotiate 
the termination of such leases.  TEP expects that substantial cash payments
to lease participants would be required in connection with any such 
terminations.  To divest both owned and leased assets, TEP also believes 
it would have to make cash payments to various creditors and other parties.
In addition, TEP has financed a substantial portion of the generating 
assets through tax-exempt bonds.  Some of these bonds may need to be
redeemed as a result of a divestiture. See Item 7. Management's
Discussion and Analysis of Financial Condition and Operating Results, 
Investing and Financing Activities, Tax-Exempt Local Furnishing Bonds.

     TEP expects that cash payments required to divest leased assets and 
to redeem tax-exempt bonds would exceed the proceeds of the sale of owned
assets.  Under its plan, as filed, TEP requested approval to finance the 
cash requirements described above through a securitization of a competitive
transition charge (CTC).

     ACC Staff Stranded Cost Recovery Agreement

     On November 4, 1998, TEP reached a settlement agreement with
the ACC Staff related to TEP's plan to divest generation assets and
for 100% recovery of stranded costs.  In addition to supporting
TEP's proposed plan, the agreement also supported an exchange of
TEP's interests in the Navajo and Four Corners Generating Stations
for certain high voltage transmission assets currently owned by APS.
However, because the ACC did not approve the settlement agreement by
November 25, 1998, the agreement is considered withdrawn by TEP and
the ACC Staff.

     ACC Hearing Officer Proposed Order on Stranded Costs

     On February 5, 1999, the ACC Hearing Officer issued a Proposed
Opinion and Order (Proposed Order) which, if adopted by the ACC,
would modify the June 1998 order so that, among other things,
divestiture is not required for 100% stranded cost recovery.  The
recommended order, which was revised on March 12, 1999, allows each
Affected Utility to choose from the following options:

     (1)  Net Revenues Lost Methodology -- Stranded costs would be
          determined by comparing generation revenues with competition
          versus revenues without competition. Stranded costs would be
          separated between regulatory and generation assets.  Generation
          related stranded costs would be recovered over a five-year period
          as follows: (i) customers who continue to receive standard offer
          bundled service would pay 100% of their proportionate share of
          stranded costs, and (ii) customers electing to purchase energy
          from competitors would pay a CTC on a declining percentage basis,
          paying 100% of their proportionate share of stranded costs in year
          one, 80% in year two, and decreasing 20% each year.  Pre-existing
          regulatory assets would be recovered 100% from all customers.  Any
          return on unamortized regulatory assets would be reduced by 20%
          per year over five years following the initial five-year period.
     (2)  Divestiture/Auction Methodology -- Stranded costs would be
          the difference between the market value from sale of non-essential
          generation assets and their book value.  Each generation asset
          would include its portion of appropriate regulatory assets.  The
          Affected Utility would be permitted to recover 100% of stranded
          costs over a ten-year period, with no return on the unamortized
          balance.  All customers would be charged either through the
          standard offer rate or through a CTC.
     (3)  Financial Integrity Methodology -- The Affected Utility would
          recover costs sufficient to maintain financial viability, that is,
          have revenues sufficient to meet minimum financial ratios (similar
          to the previous Transition Revenues Methodology).  All customers
          would pay their share over a ten-year period either through the
          standard offer rate or through a CTC.
     (4)  Settlement Methodology -- Some combination of Options 1, 2, 
          and/or 3, submitted as a settlement option.
     (5)  Alternative Methodology -- A combination approach, found by the 
          ACC to be in the best interest of all stakeholders.

     Under the Proposed Order, Affected Utilities will have an
opportunity to amend their previously filed stranded cost implementation 
plans.  TEP filed exceptions to the Proposed Order on February 17, 1999.  
No meeting date has yet been set to consider this Proposed Order.  If 
the Proposed Order is approved, thereby amending the June 1998 stranded 
cost order, TEP may amend its August 1998 stranded cost recovery proposal.
TEP intends to continue to seek 100% recovery of its stranded costs.

  STATE AND FEDERAL LEGISLATION ON RETAIL COMPETITION

     In May 1998 the Arizona State Legislature approved and the
Governor signed a bill regarding retail electric competition.  The
legislation requires the introduction of customer choice to 20% of
each public power entity's retail load by December 31, 1998, with
100% customer choice by December 31, 2000.  Although this legislation 
relates directly only to public power entities such as SRP, the bill 
encourages broader application of the legislation's principles by the 
ACC to the state's investor-owned utilities, including TEP, and to 
cooperatives.

     Additionally, federal legislators introduced several retail
competition initiatives in Congress which, if passed, could modify
or override the actions taken by the ACC or the Arizona Legislature.
We are unable to predict when Congress will act or the ultimate
impact of such federal legislative initiatives.


  WHOLESALE TRANSMISSION ACCESS

     In April 1996, the FERC issued two orders pertaining to wholesale 
transmission access.  FERC Order No. 888 requires all public utilities 
that own, control, or operate interstate transmission facilities to offer 
transmission service to others under a single tariff.  This tariff must 
incorporate certain minimum terms and conditions of transmission service 
established by the FERC and 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.  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 to prevent employees of a public utility engaged in 
marketing functions from obtaining preferential access to OASIS-related 
information or from engaging in discriminatory business practices. 
TEP is in compliance with the requirements of FERC Orders 888 and 889.

     TEP, along with other transmission owners and users located in
the southwestern United States, is investigating the feasibility of
forming an ISO for the region.  An ISO would be responsible for
ensuring transmission reliability and nondiscriminatory access to
the regional transmission grid.  Over 50 participants have signed a
Development Agreement.  The formation of an ISO would be subject to
approval by the FERC and state regulatory authorities in the region.
The financial aspects of forming an ISO, including the potential
effects on TEP's future results of operations, will be examined as
part of the developmental work.

     The ACC Retail Electric Competition Rules require the formation
and implementation of an Arizona Independent Scheduling Administrator 
Association (AISA).  The purpose of the AISA is to:

     --  calculate available transmission capacity for Arizona
         transmission facilities that belong to the Affected
         Utilities or other participants;
     --  develop and operate an OASIS which covers all participants'
         transmission systems;
     --  implement and oversee the nondiscriminatory application of
         protocols to ensure statewide consistency for transmission
         access; and
     --  provide dispute resolution processes and receive all requests
         for reservation and scheduling of Arizona transmission
         facilities.

TEP, as an Affected Utility, participated in the creation of the
AISA.  This includes its incorporation as a not-for-profit entity,
the filing at the FERC for approval of its proposed structure, rates
and procedures, and drafting of its protocols for operation.  At the
AISA's request, FERC has not ruled upon the filing pending the
outcome of the competition rules.  TEP continues to participate,
however, with the other Affected Utilities in developing the AISA's
corporate structure and protocols in anticipation of the
implementation of retail competition.  See ACC Rules on Retail
Electric Competition.

  OTHER RATE MATTERS

     See Regulated Electric Utility Operations, Customers and Item
7. - Management's Discussion and Analysis of Financial Condition and
Results of Operations, Competition, Retail for a discussion of TEP's
contracts and negotiations with certain of its mining customers.


FUEL SUPPLY
- -----------

     TEP's principal fuel for electric generation is low-sulfur coal.  
Fuel cost information for the years 1998 -1994 is provided below:


<TABLE>
<CAPTION>

             Cost Per Million BTU Consumed      Percentage of Total BTU Consumed
             -----------------------------      --------------------------------
            1998   1997   1996   1995   1994      1998  1997  1996  1995  1994
            ----   ----   ----   ----   ----      ----  ----  ----  ----  ----   
<S>         <C>    <C>    <C>    <C>    <C>       <C>    <C>   <C>   <C>   <C>             
Coal (A)   $1.65  $1.66  $1.76  $1.71  $1.75       97%   97%   98%   99%   98%                         
Gas         2.67   2.74   2.24   1.69   1.86        3     3     2     1     2  
All Fuels   1.69   1.68   1.77   1.71   1.75      100%  100%  100%  100%  100%

- ------------------------------------------
<FN>
(A)The average cost per ton of coal for each of the last five years
   (1998 - 1994) was $31.33, $31.33, $32.95, $32.11, and $33.12,
    respectively.

</TABLE>

  COAL

     Information concerning TEP's coal contracts is detailed below:
        

<TABLE>
<CAPTION>
                                        Year     Average  Cost Per Million 
                                      Contract   Sulfur      BTU (A)            Coal Obtained
Station        Coal Supplier         Terminates  Content  1998   1997   1996    From (B)   
- -------        -------------         ----------  -------  ----   ----   ----    ------------- 
<S>            <C>                      <C>      <C>      <C>    <C>    <C>     <C>
Four Corners   BHP Minerals Inter-      2005     0.8%    $1.03   $0.95  $1.34   Navajo Indian
               national, Inc.                                                   Tribe
San Juan       San Juan Coal Company    2017     0.8%    $1.80   $1.74  $1.77   Federal and State
                                                                                Agencies
Navajo         Peabody Western Coal     2011     0.6%    $1.21   $1.13  $1.18   Navajo and Hopi
               Company                                                          Indian Tribes
Springerville  Peabody Coalsales        2010     0.7%    $1.69   $1.77  $1.84   Lee Ranch Coal 
(C)            Company                                                          Company
Irvington      The Pittsburg & Midway   2015     0.4%    $2.52   $1.99  $2.21   Navajo Indian Tribe
               Coal Mining Company                                              and Federal and     
                                                                                State Agencies
- -------------------------------
<FN>
(A)Includes transportation and handling costs.
(B)Substantially all ofthe suppliers' leases extend atleast as long as coal
   is being mined in economic quantities.
(C)Coal handling facilities costs included in Springerville fuel costs 
   above were $0.22 per million BTU in 1998, $0.23 per million BTU in 1997,
   and $0.25 per million BTU in 1996.  
       
  </TABLE>


     TEP-Operated Generating Facilities

     TEP operates the Springerville and Irvington Generating Stations.  
The coal supplies for these plants are transported from northwestern New 
Mexico by railroad.  

     In June 1997, TEP terminated its existing coal supply contract for 
the Springerville Generating Station for a $50 million fee and entered 
into a new contract with the same supplier.  The new contract ends in 2010,
with an option to extend the term for another ten years.  See Notes 2 and 
10 of Notes to Consolidated Financial Statements, Deferred Springerville 
Contract Termination Fee and Commitments and Contingencies, TEP Commitments
Fuel Purchase.  The coal supply contract termination date for the Irvington
station is the earlier of 2015 or the remaining life of Unit 4.  

     The Springerville and Irvington contracts have various adjustment 
clauses that will affect the future cost of coal delivered.  We expect 
coal reserves to be sufficient to supply the estimated requirements of 
Springerville and Irvington for their presently estimated remaining lives.

     The Springerville and Irvington contracts combined require TEP
to take 2.1 million tons of coal per year from 1999 to 2009.  The
coal supply contracts require TEP to pay a take-or-pay charge if minimum 
quantities of coal are not purchased.  TEP's present fuel requirements 
are in excess of the take-or-pay minimums.  However, TEP also purchases 
coal or natural gas in the spot market, or switches fuel burn from one 
generating station to another in order to reduce overall fuel costs, 
despite incurring take-or-pay minimum charges.  In 1998 and 1996 TEP 
incurred take-or-pay charges of $3.5 million and $4.4 million, 
respectively.  No take-or-pay charges occurred in 1997.
          
     Generating Facilities Operated by Others

     TEP also participates in jointly owned generating facilities
where coal supplies are under long-term contracts entered into by
the operating agents.  Coal supplies are surface-mined in northern
Arizona and northwestern New Mexico.  The coal supply for the San
Juan Station, a mine-mouth operation, is partially contracted through 
the year 2017. The coal contract for Four Corners terminates in 2005.  
The coal quantities under contract for the Navajo mine-mouth coal 
fired generating station are expected to be sufficient for the 
remaining life of the station.

  SPRINGERVILLE COAL HANDLING FACILITIES

     TEP is the lessee of the coal-handling facilities at Springerville 
under a capital lease, referred to as the Springerville Coal Handling 
Facilities Leases.  This lease has a remaining initial lease term 
through 2015 with fair market value renewal and purchase options.  At 
December 31, 1998, the capitalized lease asset related to the Springerville
coal-handling facilities, net of accumulated amortization, was $170 
million.  Annual rental payments range from approximately $10 million to 
$28 million but average $21 million.

     TEP allocates portions of the costs of its Springerville Coal
Handling Facilities Leases to deferred expense for future recovery
through rates.  See Note 2 of Notes to Consolidated Financial Statements, 
TEP's Regulatory Assets and Liabilities, for a description of the 
accounting for the Springerville Coal Handling Facilities Leases.  
Approximately half of the expenses of the coal handling facilities, 
including lease costs and other operating and maintenance expenses, 
are charged to fuel expense and amounted to $13 million, $13 million, 
and $15 million in 1998, 1997 and 1996, respectively.

  NATURAL GAS

     In 1998, TEP purchased a small amount of natural gas for power
generation (approximately 3% of total TEP generation) on the spot market 
from various suppliers.  In June 1998, TEP entered into a one-year 
agreement to purchase gas from Southwest Gas.  During 1998, TEP received
natural gas sufficient to meet all of its needs.


WATER SUPPLY
- ------------

     TEP believes there will be sufficient water to supply the
requirements of existing and planned electric generating stations in
which TEP has an interest for their estimated lives.  A federal contract 
for water at San Juan expires in 2005, and Public Service Company of 
New Mexico is overseeing negotiations for extension of the contract.


ENVIRONMENTAL MATTERS
- ---------------------

     TEP is subject to environmental regulation by federal, state
and local authorities.  Air and water quality are under the most
stringent regulations.  Resource extraction, waste disposal operations 
and land use are also regulated.  TEP spent $14 million in 1998 and $19 
million in 1997 for construction costs to comply with environmental 
requirements.  TEP estimates that it will spend $6.0 million in 1999 
and $0.5 million in 2000 for environmental compliance.  These amounts 
include TEP's estimated share of expenditures for improvements to shared 
facilities, as discussed below.  TEP believes that all existing 
generating facilities are or will be in compliance with all existing 
or expected environmental regulations, except as described below.

     Clean Air

     Arizona and New Mexico have adopted emission regulations
restricting the emissions from both existing and future coal, oil
and gas-fired plants.  These regulations are in some instances more
stringent than those adopted by the EPA.  The principal generating
units of TEP are located relatively close to national parks, monuments, 
wilderness areas and Indian reservations.  Since these areas have 
relatively high air quality, TEP could be subject to control standards 
of best available control technology and best available retrofit 
technology.  Such standards relate to the "prevention of significant 
deterioration" of visibility and tall stack limitation rules.

     The 1990 Federal Clean Air Act Amendments (CAAA) require
reductions of sulfur dioxide (SO2) and nitrogen oxide (NOx) emissions in 
two phases, more complex facility permits and other requirements which 
are currently in effect. TEP is subject only to Phase II of the SO2 and 
NOx emission reductions which is effective January 1, 2000.  All of TEP's
generating facilities (except internal combustion turbines) are affected. 
TEP spent approximately $1 million in each of 1998, 1997 and 1996 and 
expects to spend approximately $1 million annually in 1999 and 2000 
complying with these requirements.

     In 1993, TEP's generating units affected by Phase II were
allocated SO2 Emission Allowances based on past operational history.
Beginning in the year 2000, Phase II generating units must hold Emission 
Allowances equal to the level of emissions in the compliance year or pay 
penalties and offset excess emissions in future years.  Due to the increase
in energy output at Springerville, TEP may not have sufficient Emission 
Allowances to permit normal plant operation in compliance with the Phase 
II SO2 regulations.  TEP may have to purchase additional Emission
Allowances.  Based on current estimates, TEP believes that it will
be able to acquire additional required allowances and that such
purchases will not have a material effect on TEP.

     Title V of the CAAA requires that all of TEP's generating
facilities obtain more complex air quality permits.  All TEP facilities 
(including those jointly owned and operated by others) have applied for 
these permits and TEP does not anticipate any material problems in 
obtaining the required permits.  TEP must pay an annual emission-based 
fee for each generating facility subject to a Title V permit.  These 
emission-based fees are included in the CAAA compliance expenses discussed
above.

     The CAAA also require multi-year studies of visibility impairment 
in specified areas and studies of hazardous air pollutants.  The results 
of these studies will impact the development of future regulations of 
electric utility generating units.  Since these activities involve the 
gathering of information not currently available, TEP cannot predict 
the outcome of these studies.

     TEP may incur additional costs to comply with recent and future
changes in federal and state environmental laws, regulations and
permit requirements at existing electric generating facilities.
Compliance with these changes may result in a reduction in operating
efficiency.  TEP may need variances from certain environmental
standards and operating permit conditions until required equipment
and processes for control, handling and disposal of emissions are
operational and reliable.  Failure to comply with any EPA or state
compliance requirements may result in substantial penalties or fines.

     Jointly-Owned Facilities -- SO2 Emission Capital Improvements

     --  Navajo -- In 1991, the EPA adopted a rule to reduce SO2
         emissions at Navajo by 90% to improve visibility at Grand Canyon
         National Park.  TEP's share of the required capital expenditures
         remaining as of December 31, 1998 is approximately $4.5 million.
     --  San Juan -- To improve the efficiency of SO2 removal at San
         Juan, the existing system is being replaced.  TEP's estimated
         share of the remaining costs as of December 31, 1998 is
         approximately $2 million.


 UNREGULATED ENERGY BUSINESSES
- ------------------------------

     Our unregulated energy businesses are organized under Millennium 
Energy Holdings, Inc. (Millennium), a wholly-owned subsidiary of 
UniSource Energy.  Millennium owns 100% of the common stock of four 
subsidiaries (described below).

     In addition to the activities currently underway or planned for
each of these subsidiaries, we continue to evaluate potential investment 
opportunities in other energy-related markets.  According to the ACC 
Holding Company Order, the capitalization (debt and equity) of the 
subsidiaries which are the sister companies to TEP may not exceed 30% 
of TEP's capitalization unless otherwise approved by the ACC.  
Millennium's total capitalization as of December 31, 1998 was $77 
million or approximately 3% of TEP's total capitalization.

     Our investments in the unregulated energy businesses owned by 
Millennium comprise approximately 3% of the consolidated assets of       
UniSource Energy.  Millennium recorded a net loss of $8.1 million 
for the year ended December 31,1998 related to these investments.  These 
results are included in the Other Income (Deductions) section on UniSource 
Energy's income statement.  We discuss the reasons for this loss in Item 
7. Management's Discussion and Analysis of Financial Condition and Results
of Operations, Results of Operations, Results of Unregulated Energy 
Businesses.

     Nations Energy

     Nations Energy Corporation was established in 1995 to develop
and invest in independent power projects worldwide.  Nations Energy
is involved in the following projects:

     -- In 1996, Nations Energy became actively involved in the
        development of a power project in the Czech Republic.  In the
        third quarter of 1998, Nations Energy paid $8.1 million for a
        minority interest in this project, which consists of the upgrade
        and expansion of an existing cogeneration facility located in the
        city of Kladno.  This project is scheduled for completion in late-
        1999.  As of December 31, 1998, Nations Energy's total investment
        in this project was $15.8 million.
     -- In the third quarter 1998, Nations Energy purchased a minority
        interest in Corporation Panamena de Energia, S.A. (COPESA) for
        $7.5 million.  COPESA is an independent power producer which owns
        and operates a 43 MW power plant near Panama City.  The energy is
        sold under an agreement with an unrelated party.

In addition to these projects, Nations Energy is actively involved in the 
development of other investment opportunities in both domestic and foreign
energy markets.

     In September 1995, Nations Energy and Trigen Energy Corporation
formed a limited partnership called Trigen-Nations Energy, which
purchased the 40MW Coors Brewing Company power plant in Golden,Colorado.  
Nations Energy had a 49% interest in that partnership.  In the third 
quarter of 1998, Nations Energy sold a 48% interest in that partnership 
to Trigen Energy Corporation, retaining a 1% interest.  Nations Energy 
recorded a $5.8 million after-tax gain on the sale.

     As a result of damages from Hurricane Mitch, in the fourth
quarter of 1998, Nations Energy wrote-off $1.6 million in capitalized 
development costs and prepaid consulting expenses related to a project 
in Honduras.

     MEH and NEV

     MEH Corporation holds a 50% interest in New Energy Ventures, Inc.  
MEH exercised its option to acquire its 50% ownership interest in NEV 
effective September 1, 1997.  NEV was organized in 1995 for the purpose 
of acting as a buyer's agent in procuring electric energy, performing 
energy services, engaging in power marketing and trading and other 
energy related activities.

     NEV serves retail customers in California, New York and
Pennsylvania.  As of December 31, 1998, NEV had contracts to purchase 
energy for and sell energy to customers with a combined electrical demand
of more than 2,000 MW.  Until time-of-use meters are installed for all 
of those customers by the local utilities providing distribution services, 
NEV is actually serving about 400 MW of load.  NEV also participates in 
East and West Coast wholesale energy markets.  NEV obtains its energy 
supply through purchase power contracts and spot market purchases.  See 
Note 5 of Notes to Consolidated Financial Statements, Unregulated Energy 
Businesses, for additional information on NEV's operations.

     NEV Technologies, a subsidiary of NEV, and its two joint
ventures hold exclusive distribution rights for the AlliedSignal
TurboGenerator TM in the western United States and certain international 
markets.  The TurboGenerator TM is a microturbine (for applications 
requiring 40 kW-500 kW) which can be used for distributed generation, 
off-grid power generation, portable power, and cogeneration, and provides
NEV with additional capabilities to provide energy options to its customer 
base.  In October 1998, Edison International made a $10 million minority 
equity investment in NEV Technologies.  NEV Technologies' two international
joint ventures are 50% owned by Dames & Moore Ventures.

     New Energy Ventures Southwest, L.L.C. (NEV Southwest) was formed in 
October 1998 and has offices in Tucson and Phoenix.  NEV Southwest was 
originally a wholly-owned subsidiary of MEH, and became a wholly-owned 
subsidiary of NEV in February 1999.  NEV Southwest will be responsible 
for developing new customer service opportunities, including energy supply 
and trading, in Arizona, Nevada, Utah, Colorado, and New Mexico, as these 
states open their markets to retail electric competition.

     AET and Global Solar

     Advanced Energy Technologies, Inc. was established in May 1996.
This wholly-owned subsidiary of Millennium develops renewable energy
and distributed generation technologies.  In 1996 AET acquired a 50%
ownership interest in Global Solar Energy, L.L.C., an Arizona corporation
which develops and manufactures flexible thin-film photovoltaic cells.  
Commercial production of photovoltaic cells is scheduled to begin in 1999. 
We expect Global Solar's manufacturing facility to produce up to 1 MW or 
170,000 square feet of the product in the first twelve months of commercial
production.

     SES

     Southwest Energy Solutions, Inc., a wholly owned subsidiary of
Millennium, was established in January 1997.  SES provides energy support 
services to retail electric consumers including lighting equipment, 
service restoration, and design, engineering and construction services.


EMPLOYEES
- ---------

     As of December 31, 1998, TEP had 1,174 employees and wholly-owned 
subsidiaries of Millennium had 33 employees.  The International Brotherhood
of Electrical Workers (IBEW) 1116 represents about 60% of TEP's employees.
The collective bargaining agreement between the local union and TEP 
terminated on November 30, 1998.  The collective bargaining agreement has 
been extended to November 30, 1999 for Springerville Generating Station 
employees in exchange for a 2.5% wage increase.  Labor and management 
reached a tentative agreement on a new four-year labor contract for Tucson
employees in the first quarter of 1999.

<PAGE>


<TABLE>
<CAPTION>



TEP's UTILITY OPERATING STATISTICS
                                                             For Years Ended December 31,
                                               1998        1997         1996       1995       1994 
- ------------------------------------------------------------------------------------------------------
<S>                                         <C>         <C>         <C>         <C>         <C>      
Generation and Purchased  Power-kWh (000)
  Remote Generation (Coal)                  10,002,250   9,694,152   9,784,918   8,716,513   9,341,342
  Local Generation (Oil, Gas & Coal)           720,515     806,819     723,232     500,958     825,385
  Purchased Power                            2,227,773   1,222,970     925,394     692,769     501,269
- ------------------------------------------------------------------------------------------------------    
    Total Generation and Purchased Power    12,950,538  11,723,941  11,433,544   9,910,240  10,667,996
  Less Losses and Company Use                  810,117     824,072     776,436     661,901     639,278
- ------------------------------------------------------------------------------------------------------
    Total Energy Sold                       12,140,421  10,899,869  10,657,108   9,248,339  10,028,718
======================================================================================================

Sales-kWh (000)
  Residential                                2,662,598   2,608,515   2,516,282   2,330,191   2,374,868
  Commercial                                 1,355,319   1,316,360   1,306,826   1,280,752   1,281,050   
  Industrial                                 2,139,464   2,115,332   2,080,763   1,979,317   1,948,331
  Mining                                     1,230,259   1,193,094   1,164,140   1,147,281   1,135,424 
  Public Authorities                           242,845     237,113     228,800     204,746     183,525
- ------------------------------------------------------------------------------------------------------
    Total - Retail Customers                 7,630,485   7,470,414   7,296,811   6,942,287   6,923,198
  Sales for Resale                           4,509,936   3,429,455   3,360,297   2,306,052   3,105,520
- ------------------------------------------------------------------------------------------------------
    Total Sales                             12,140,421  10,899,869  10,657,108   9,248,339  10,028,718 
======================================================================================================

Operating Revenues (000)
  Residential                                 $248,821    $246,251    $237,569    $218,208    $220,341   
  Commercial                                   146,269     146,377     143,623     138,294     137,508 
  Industrial                                   157,735     158,266     154,547     146,409     144,677
  Mining                                        51,965      53,231      56,240      54,948      53,821
  Public Authorities                            17,950      17,531      16,949      14,952      13,435
  Other                                          2,981       2,565       2,636       2,114       1,651
- ------------------------------------------------------------------------------------------------------
    Total - Retail Customers                   625,721     624,221     611,564     574,925     571,433 
  Amortization of MSR Option Gain  
    Regulatory Liability                             -       8,105      20,053      20,053      20,053 
  Sales for Resale                             143,269      97,567      84,256      75,591      99,987 
- ------------------------------------------------------------------------------------------------------
    Total Operating Revenues                  $768,990    $729,893    $715,873    $670,569    $691,473
======================================================================================================

Customers (End of Period)
  Residential                                  295,469     287,857     282,060     273,976     266,060
  Commercial                                    28,648      28,309      28,199      27,858      27,360
  Industrial                                       684         664         626         620         588
  Mining                                             4           4           4           4           4
  Public Authorities                                61          61          61          59          59
- ------------------------------------------------------------------------------------------------------
    Total Retail Customers                     324,866     316,895     310,950     302,517     294,071  
======================================================================================================

Average Revenue per kWh Sold (cents)
  Residential                                      9.3         9.4         9.4         9.4         9.3
  Commercial                                      10.8        11.1        11.0        10.8        10.7
  Industrial and Mining                            6.2         6.4         6.5         6.4         6.4
    Average Retail Revenue per kWh Sold            8.2         8.4         8.4         8.3         8.3

Average Revenue per Residential Customer          $855        $865        $854        $809        $841
Average kWh Sales per Residential Customer       9,144       9,159       9,050       8,641       9,066

</TABLE>
         
<PAGE>


ITEM 2. PROPERTIES
- -------------------------------------------------------------------------

     TEP's transmission facilities, located in Arizona and New Mexico, 
transmit electricity from TEP's remote electric generating stations at 
Four Corners, Navajo, San Juan and Springerville to the Tucson area for 
use by TEP's retail customers (see Item 1, Business, Generating and 
Other Resources for the location of TEP's plants).  The transmission 
system is directly interconnected with systems operated by the following 
utilities:


         Utility                                   Location
         -------                                   --------
         Arizona Public Service Co.                Arizona
         Arizona Electric Power Cooperative        Arizona
         El Paso Electric Co.                      New Mexico, Texas
         Public Service Co. of New Mexico          New Mexico
         Salt River Project                        Arizona

     TEP has arrangements with approximately 180 companies, including 
the five listed above, to interchange generation capacity and transmission 
of energy.

     As of December 31, 1998, TEP owned, or participated in, an overhead 
electric transmission and distribution system consisting of:

          --  511 circuit-miles of 500 kV lines;
          --  1,122 circuit-miles of 345 kV lines;
          --  350 circuit-miles of 138 kV lines;
          --  440 circuit-miles of 46 kV lines; and
          --  9,643 circuit-miles of lower voltage primary lines.

The underground transmission and distribution system was comprised of 
5,071 cable-miles.  TEP owns approximately 76% of the poles on which the
lower voltage lines are located.  Electric substation capacity consisted 
of 173 substations with a total installed transformer capacity of 
5,329,605 kVA.

     The electric generating stations (except as noted below), TEP's
general office building, operating headquarters and warehouse and
service center are located on land owned by TEP.  The electric
distribution and transmission facilities owned by TEP are located:

          --  on property owned by TEP;
          --  under or over streets, alleys, highways and other public
              places, the public domain and national forests and state
              lands under franchises, easements or other rights which are
              generally subject to termination;
          --  under or over private property as a result of easements
              obtained primarily from the record holder of title; and
          --  over Indian reservations under grant of easement by the
              Secretary of Interior or lease by Indian tribes.

It is possible that some of the easements, and the property over which 
the easements were granted, may have title defects or may be subject to 
mortgages or liens existing at the time the easements were acquired.

     Springerville is located on land parcels held by TEP under a
long-term surface ownership agreement with the State of Arizona.

     Four Corners and Navajo are located on properties held under
easements from the United States and under leases from the Navajo
Indian Tribe.  TEP, individually and in conjunction with PNM in
connection with San Juan, has acquired easements and leases for
transmission lines and a water diversion facility located on the
Navajo Indian Reservation.  TEP has also acquired easements for
transmission facilities, related to San Juan and Navajo, across the
Zuni, Navajo and Tohono O'odham Indian Reservations.

     TEP's rights under these various easements and leases may be
subject to defects such as:

      --  possible conflicting grants or encumbrances due to the
          absence of or inadequacies in the recording laws or record
          systems of the Bureau of Indian Affairs and the Indian tribes;
      --  possible inability of TEP to legally enforce its rights
          against adverse claimants and the Indian tribes without
          Congressional consent; and
      --  failure or inability of the Indian tribes to protect TEP's
          interests in the easements and leases from disruption by the
          U.S Congress, Secretary of the Interior, or other adverse
          claimants.

However, these possible defects have not and are not expected to
materially interfere with TEP's interest in and operation of its 
facilities.

     TEP, under separate sale and leaseback arrangements, leases the
following facilities (which do not include land):

      --  coal handling facilities at Springerville;
      --  a 50% undivided interest in the Springerville Common
          Facilities;
      --  Springerville Unit 1 and the remaining 50% undivided
          interest in Springerville Common Facilities; and
      --  Irvington Unit 4 and related common facilities.

See Note 7 of Notes to Consolidated Financial Statements, TEP's
Long-Term Debt and Capital Lease Obligations for additional information 
on TEP's capital lease obligations.

     Substantially all of the utility assets owned by TEP are subject 
to the lien of the General First Mortgage and the General Second Mortgage. 
Springerville Unit 2, which is owned by San Carlos, is not subject to 
those liens.



ITEM 3. LEGAL PROCEEDINGS
- -----------------------------------------------------------------------

 TAX ASSESSMENTS
 ---------------

     See Contingencies in Note 10 of Notes to Consolidated Financial
Statements.

 LITIGATION RELATED TO ACC ORDERS AND RETAIL COMPETITION
 --------------------------------------------------------

     See Rates and Regulatory Matters.


ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
- -----------------------------------------------------------------------

     Not Applicable.




                               PART II


ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER 
- -----------------------------------------------------------------------
        MATTERS
        -------

     On January 1, 1998, TEP and UniSource Energy completed a transaction 
by which all outstanding shares of TEP common stock were exchanged, on a
share-for-share basis, for shares of UniSource Energy common stock.  As 
a result of this exchange, TEP became a wholly-owned subsidiary of 
UniSource Energy.  As such, TEP's common stock is no longer publicly 
traded.

     UniSource Energy
     ----------------

     The common stock of UniSource Energy is listed on the New York
and Pacific Stock Exchanges, and began trading under the symbol of UNS on 
January 2, 1998.  The closing price of the common stock on March 8, 1999 
was $11.875, with 25,219 shareholders of record.  The table below lists 
the high and low sale prices of UniSource Energy's common stock on the 
consolidated tape as reported by Dow Jones.  No dividends were paid on 
UniSource Energy common stock during these periods.

<TABLE>
<CAPTION>

                                              Market Price per
                    Quarter                 Share of Common Stock
                    -------                 ---------------------
                                               High        Low
                                               ----        ---
                    1998
                    ----
                    <S>                     <C>           <C>
                    First                   $18.69        $16.56
                    Second                   18.94         15.31
                    Third                    16.06         12.25
                    Fourth                   17.50         12.50

</TABLE>

     TEP
     ---

     Prior to the share exchange described above, the common stock of TEP 
was traded on the New York and Pacific Stock Exchanges.  The table below 
lists the high and low sale prices of TEP's common stock for 1997 on the 
consolidated tape as reported by Dow Jones.  No dividends were paid on 
TEP common stock during 1997.


<TABLE>
<CAPTION>


                                             Market Price per
                    Quarter                Share of Common Stock
                    -------                ---------------------
                                           High            Low
                                           ----            ---
                    1997
                    ---
                    <S>                    <C>           <C>
                    First                  $16.75        $14.00
                    Second                 15.38          13.88
                    Third                  18.25          14.38
                    Fourth                 18.19          16.19


</TABLE>
        

     TEP declared and paid a cash dividend of $30 million to its sole 
shareholder, UniSource Energy, in the fourth quarter of 1998.

     See Item 7. - Management's Discussion and Analysis of Financial
Condition and Results of Operations, Dividends on Common Stock.


<PAGE>

ITEM 6. - SELECTED CONSOLIDATED FINANCIAL DATA
- -------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                    UniSource
                                     Energy        TEP               UniSource Energy and TEP
                                      --------------------------------------------------------------------
                                       1998        1998        1997        1996       1995        1994
                                       ----        ----        ----        ----       ----        ----
                                               (In thousands - except per share data and ratios)
Summary of Operations
- ----------------------------------------------------------------------------------------------------------
                                     <C>         <C>          <C>         <C>         <C>         <C>
Operating Revenues                   $768,676    $768,990    $729,893    $715,873    $670,569    $691,473
Income Tax Benefit Recognition
 Related to Prior Period NOLs -
 Part of Income Taxes                      -           -      $43,443     $88,638     $23,282           -
Net Income (Loss) of Unregulated
 Energy Businesses                    $(8,109)          -     $(5,344)    $(2,284)    $(1,327)          -
Net Income (Loss)                     $28,032     $41,676     $83,572    $120,852     $54,905      $20,740

Basic Earnings per Share                $0.87         N/M       $2.60       $3.76       $1.71        $0.65
Diluted Earnings per Share              $0.87         N/M       $2.59       $3.75       $1.70        $0.64

Shares of Common Stock Outstanding 
 Average                               32,178         N/M      32,138      32,136      32,138       32,145
 End of Year                           32,258         N/M      32,139      32,139      32,138       32,145

Book Value per Share                    $7.65         N/M       $6.75       $4.15       $0.39       $(1.31)
- -----------------------------------------------------------------------------------------------------------

Financial Position
- -----------------------------------------------------------------------------------------------------------
Total Utility Plant - Net          $1,915,590  $1,915,590  $1,935,513  $1,953,904  $1,978,126   $2,007,422
Investments and Other Property        110,318      62,978      79,471      69,289      52,116       12,992
Total Assets                        2,634,180   2,628,583   2,634,409   2,568,541   2,563,461    2,730,229

Long-Term Debt                      1,184,423   1,184,423   1,215,120   1,223,025   1,207,460    1,381,935
Capital Lease Obligations             889,543     889,543     890,257     895,867     897,958      922,735
Common Stock Equity (Deficit)         246,646     229,861     216,878     133,288      12,488      (42,233)
                                   ------------------------------------------------------------------------
Total Capitalization               $2,320,612  $2,303,827  $2,322,255  $2,252,180  $2,117,906    2,262,437
- -----------------------------------------------------------------------------------------------------------

Net Cash Flows from Operations (A)   $162,745    $181,858    $126,283    $152,932    $119,390     $143,616
Capital Expenditures (B)               81,148      81,011      72,475      68,272      59,097       62,599
                                    -----------------------------------------------------------------------
Free Cash Flow (A-B)                 $ 81,597    $100,847    $ 53,808    $ 84,660    $ 60,293     $ 81,017  
- ----------------------------------------------------------------------------------------------------------- 
Ratio of Earnings to Fixed Charges        N/R        1.35        1.39        1.25        1.21         1.10

</TABLE>

N/M - Not Meaningful
N/R - Not Required
Note: See Item 7, Management's Discussion and Analysis of Financial 
      Condition and Results of Operations.

         
<PAGE>


ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
- ------------------------------------------------------------------------
        RESULTS OF OPERATIONS
        ---------------------

     Management's Discussion and Analysis explains the general financial 
condition and the results of operations for UniSource Energy and its 
two primary business segments - the regulated electric utility business 
of TEP and the unregulated energy businesses of Millennium, and includes 
the following:

     --  operating results during 1998 compared with 1997 and 1997
         compared with 1996,
     --  the outlook for dividends on common stock,
     --  changes in liquidity and capital resources during 1998, and
     --  expectations of identifiable material trends which may affect
         our business in the future.

     TEP is the principal operating subsidiary of UniSource Energy and 
accounts for substantially all of its assets, revenues and net income.  
The financial condition and results of operations of TEP are currently 
the principal factors affecting the financial condition and results of 
operations of UniSource Energy on an annual basis, although losses from 
energy-related ventures of Millennium and certain of its subsidiaries 
and interests have reduced the earnings reported by UniSource Energy 
for the years ended December 31, 1998, 1997 and 1996.

OVERVIEW
- --------

     UniSource Energy recorded net income of $28.0 million in 1998,
compared with $83.6 million in 1997 and $120.9 million in 1996. Income tax 
benefits related to prior period net operating losses were zero in 1998, 
$43.4 million in 1997 and $88.6 million in 1996, accounting for the 
majority of the fluctuation in reported net income for the last three 
years.  See Income Tax Benefits below.  Common stock equity was $246.6 
million at year-end, compared with $216.9 million as of December 31, 1997.

     In addition to the reduction in income tax benefits described above, 
the major reasons for the variance between the results for 1998 and the 
results for 1997 were:

     --  $10.7 million in higher interest costs in 1998 as a result
         of refinancing debt on a fixed rate basis from a variable rate
         basis,
     --  $10.2 million in pre-tax other income from a reversal of
         loss provision in 1997,
     --  $8.1 million of non-cash regulatory revenues recorded in
         1997,
     --  a $4.4 million reduction in retail revenues in 1998 related
         to a change in the method of estimating unbilled revenues,
     --  a 1.1% retail rate decrease effective July 1, 1998, and
     --  net losses from our unregulated energy businesses of $8.1
         million in 1998 compared with $5.3 million in 1997.

     Our financial prospects are subject to significant regulatory,
economic, and other uncertainties.  Regulatory uncertainties include
the impact of the introduction of retail competition in Arizona and
the resolution of the Stranded Cost Recovery Plan filed by TEP with
the ACC in the third quarter of 1998.  Until the uncertainties
surrounding the introduction of retail competition in Arizona are
resolved, predicting the level of TEP's future energy sales and the
composition of its future revenues is difficult.  See Competition,
Retail below.  In a deregulated environment, revenues from sales of
energy may become less certain although revenues from transmission
and distribution services, which we expect to remain regulated, would 
likely continue to grow.  Even in a deregulated environment, TEP expects 
to continue to benefit from the anticipated population and economic 
growth in the Tucson area through increased revenues from its regulated 
services.  Other uncertainties include the extent to which, in response 
to industry changes or unanticipated economic downturns, TEP can alter
operations and reduce costs, which may be limited due to high financial 
and operating leverage.  Our future success will depend, in part, on our 
ability to contain and/or reduce the costs of serving retail customers 
and the level of sales to such customers.

     We are addressing the uncertainties discussed above by
positioning our subsidiaries to benefit from the changing regulatory
environment.  We have aligned our corporate structure to better meet
the needs of the emerging energy markets.  In November 1998, TEP
organized its regulated business activities into three separate
business units: generation, transmission and distribution, and in
January 1999, formed a business unit which provides administrative
services to the utility business units.  We are improving cost
measurement and management techniques at TEP.  We have also extended
contracts, where appropriate, for large wholesale and retail customers, 
and are developing new affiliates to provide energy services to markets 
beyond TEP's retail service territory.  See Competition, Retail; 
Unregulated Energy Businesses; and Results of Operations below.

     Our financial prospects are also subject to uncertainties
relating to the start-up and developmental activities of our unregulated 
energy business segment.  Although our investments in unregulated energy-
related affiliates comprise approximately 3% of total assets, start-up 
costs and other subsidiary developmental activities have contributed to 
losses from certain of these activities in 1998 and 1997.  These losses 
have reduced the earnings reported by UniSource Energy on a consolidated 
basis for the years ended 1998 and 1997.

      Our consolidated capital structure remains highly leveraged.
Since April 1997, however, we have made significant progress in our
financial strategy to reduce refinancing risk by extending maturities of 
long-term debt and letters of credit and by reducing exposure to variable 
interest rates by refinancing with fixed interest rate securities.  TEP 
refinanced variable rate debt obligations into fixed rate obligations and
entered into a new bank Credit Agreement.  In the third quarter of 1998, 
TEP refinanced all of the First Mortgage Bonds that contained provisions 
prohibiting the payment of dividends, with bonds containing more flexible
financial covenants which allow TEP to pay dividends.  In December 1998, 
TEP paid a $30 million dividend to its sole shareholder, UniSource Energy.
This was the first dividend paid by TEP since 1989.  See Investing and 
Financing Activities, Bond Issuance and Redemption, and Dividends on Common
Stock, below.

     Our businesses require a great deal of capital.  TEP's capital 
requirements include construction expenditures, scheduled debt maturities 
and capital lease obligations.  During the next twelve months, TEP expects 
to be able to fund operating activities and construction expenditures with 
internal cash flows, existing cash balances, and, if necessary, borrowings 
under the Revolving Credit Facility.  Some of our unregulated energy 
businesses also require significant amounts of capital in the form of 
investments, loans or guarantees.  Our ability to invest additional 
amounts of capital in our unregulated businesses will depend on dividends 
from TEP and possible sales of equity securities.  If necessary, we may
seek investments by unaffiliated parties to meet the ongoing capital
requirements of some of these businesses.  See Liquidity and Capital
Resources, Investing and Financing Activities, below.


FACTORS AFFECTING RESULTS OF OPERATIONS
- ---------------------------------------

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

     RETAIL

     Under current law, TEP does not compete with other companies for 
electric service in TEP's retail service territory.  However, TEP competes 
against gas service suppliers and others who provide energy services.  TEP 
actively markets energy and customized energy-related services.  We have 
not lost any customers to self-generation partly because of these efforts.
For example, in recent years, TEP executed new contracts with two principal
customers that provide approximately 8% of TEP's total annual retail 
revenues.  Both customers are in the copper mining business.  The new 
contracts include price reductions, term extensions, and a provision for
interruptible service.  These contracts expire in March 2001 and January 
2003.  These mining customers cannot terminate the contracts early without
at least one and up to two years prior notice.  We have not received any 
such notices.

     The electric utility industry is undergoing significant regulatory 
change designed to encourage competition in the sale of electric services.
In this section, we discuss the current status of regulatory actions of 
the ACC regarding the introduction of retail electric competition in 
Arizona.  We also outline TEP's responses to these actions.  There is 
considerable uncertainty regarding the timing and the outcome of these 
matters.  As a result, we cannot predict the impact of retail competition 
on TEP's future operating results or financial condition.

     The future success of NEV is also dependent on the nature of
competitive retail energy markets throughout the United States.
Deregulation of the electricity industry is occurring on a state by
state basis.  The ultimate size of each market, the timing of its
opening to competition, and the rules for participation by energy
service providers vary from state to state.  To date, California is
the only state that has adopted statewide direct access competition,
while other states, such as New York and Pennsylvania, have begun to
phase-in direct access competition beginning in 1998.  During 1998,
NEV continued to increase its sales to retail customers in California 
and entered the New York and Pennsylvania markets through their pilot 
programs.  NEV opened offices in Illinois and Texas in 1998, and will 
continue to pursue opportunities in states which open their markets to 
competition.

     Retail Electric Competition Rules

     In December 1996, the ACC adopted retail electric competition rules 
(Rules) that provided a framework for the phase-in of retail electric 
competition in Arizona beginning in January 1999.  The Rules were amended 
and adopted on an emergency basis in August 1998.  The Rules, as originally
adopted, assumed a competition start date of January 1, 1999.  However, 
in January 1999, the ACC delayed the implementation of the Rules pending 
additional proceedings to resolve a number of important issues.  See 
Item 1. Business, Rates and Regulation, ACC Rules on Retail Competition, 
for a description of the key provisions of the rules as drafted.

     The ACC identified the following issues, among others, which the 
ACC believed needed to be resolved before the Rules can go into effect:

     --  establishing a competitive market structure between other
         jurisdictions and the Affected Utilities;
     --  determination of the methodologies for quantification and
         recovery of stranded costs;
     --  approval of unbundled tariffs, which provide separate rates
         for generation, transmission, distribution, metering,
         meter reading, billing and collection, and ancillary services;
     --  questions of federal and state jurisdiction on transmission 
         issues critical to system reliability; and
     --  pricing and cost recovery for must run generation.

     On February 5, 1999, the ACC Hearing Officer issued a Proposed
Opinion and Order recommending changes to the Rules.  These
recommendations include:

     --  The date to open an Affected Utility's service territory to
         competition would be set upon the resolution its of Stranded
         Costs and Unbundled Tariffs by final ACC order.
     --  If an Affected Utility's service territory is open prior to
         January 1, 2001, the existing phase-in schedule would be
         retained, calling for 20 percent of the market to initially
         have access to competitive generation supply.  As part of the
         20 percent, each Affected Utility would reserve an increasing
         percentage for residential customers according to a set
         schedule.
     --  Competitive Energy Service Provider affiliates of Affected
         Utilities may not enter another Affected Utility's service
         territory until its own territory is open to competition.  For
         example, NEV Southwest may not sell energy to retail customers
         of other Affected Utilities until TEP's territory is open to
         competition.
     --  The requirement that a portion of energy sold competitively be
         generated from solar sources was eliminated, citing it as
         prohibitively expensive and potentially hindering competition
         in Arizona.
     --  Affected Utilities will have an opportunity to amend their
         tariffs for unbundled noncompetitive services with the ACC.

     TEP filed exceptions to the Proposed Order on February 17, 1999.  
No meeting date has yet been set to consider this Proposed Order.  If 
the Proposed Order amending the Rules is adopted, it will be forwarded 
to the Secretary of State to start the amendment process.  The Arizona 
Administrative Procedures Act requires that the Rules be filed with the 
Secretary of State before they can be amended.  We anticipate that the 
stay of the Rules would probably remain in effect until amendments are 
adopted.

     We cannot predict the actual date that competition will begin
in Arizona, or the final form of the Rules.

     Stranded Costs

     On June 22, 1998, the ACC adopted an order which outlined two
options for stranded cost recovery: (i) Divestiture/Auction of all
generation assets to determine the amount of stranded costs for 100
percent recovery, or (ii) a Transition Revenues Methodology, where
the Affected Utility would retain generation assets in a separate
affiliate with sufficient revenues necessary to maintain financial
integrity, such as avoiding default under currently existing
financial instruments for a period of ten years.

     On February 5, 1999, the ACC Hearing Officer issued a Proposed
Opinion and Order (Proposed Order) which recommends modification of
the June 1998 order so that divestiture is not required for 100%
stranded cost recovery.  The recommended order, which was revised on
March 12, 1999, allows each Affected Utility to choose from the
following options:

     (1)  Net Revenues Lost Methodology
     (2)  Divestiture/Auction Methodology
     (3)  Financial Integrity Methodology
     (4)  Settlement Methodology
     (5)  Alternative Methodology

See Item 1. Business, Rates and Regulation, ACC Orders on Stranded
Cost Recovery, for a detailed description of the options.

     Under the Proposed Order, Affected Utilities will have an
opportunity to amend their previously filed stranded cost implementation 
plans.  TEP's original stranded cost recovery plan, filed on August 21, 
1998, specified divestiture of generation assets as the preferred method 
for recovery given the then available options.

     TEP filed exceptions to the Proposed Order on February 17, 1999.  
No meeting date has yet been set to consider the Proposed Order.  If the 
Proposed Order is approved, thereby amending the June 1998 stranded cost 
order, TEP may amend its August 1998 stranded cost recovery proposal.  
TEP intends to continue to seek 100% recovery of its stranded costs


  WHOLESALE

     TEP competes with other utilities, power marketers and independent 
power producers in the sale of electric capacity and energy in the 
wholesale market.  FERC generally does not permit TEP's prices for 
wholesale sales of capacity and energy to exceed rates determined on a 
cost of service basis.  However, in the fall of 1997, FERC granted TEP 
a tariff to sell at market-based rates.  In the current market, wholesale 
prices are typically substantially below TEP's total cost of service, 
but in all instances, we make wholesale sales at prices which exceed 
fuel and other variable costs.  We expect competition to sell capacity 
to remain vigorous.  Prices may remain depressed for at least the next 
several years due to the surplus of capacity in the southwestern United 
States.   Competition for the sale of capacity and energy is influenced 
by the following factors:

     --  availability of capacity in the southwestern United States,
     --  the availability and prices of natural gas, oil and coal,
     --  spot energy prices, and
     --  transmission access.

See also Item 1. Business, Regulated Electric Utility Operations
Sales for Resale.


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

     The ACC regulates TEP's utility business.  TEP generally uses
the same accounting policies and practices used by unregulated companies 
for financial reporting under generally accepted accounting principles.  
However, sometimes these principles, such as FAS 71, require special 
accounting treatment for regulated companies to show the effect of 
regulation.  For example, in setting TEP's retail rates, the ACC may 
not allow TEP to currently charge its customers to recover certain 
expenses but, instead, require that these expenses be charged to 
customers in the future.  In this situation, FAS 71 requires that TEP 
not show these expenses on its current income statements but defer these 
items and show them as regulatory assets on the balance sheet until TEP 
is allowed to charge its customers.  TEP then amortizes these items as 
expenses to the income statement as those charges are recovered from 
customers.  Similarly, certain revenue items may be deferred as regulatory
liabilities, which are also eventually amortized to the income statement.

     We have recorded regulatory assets and liabilities in our
balance sheets in accordance with FAS 71.  A regulated company must
satisfy certain conditions to apply the accounting policies and
practices of FAS 71. These conditions include:

     --  an independent regulator sets rates;
     --  the regulator sets the rates to cover specific costs of
         delivering service; and
     --  the service territory lacks competitive pressures to reduce
         rates below the rates set by the regulator.

      We periodically assess whether we continue to meet these conditions.
If we were required to stop applying FAS 71 to all or a portion of TEP's 
regulated utility operations, we would write off the related balances of 
TEP's regulatory assets and liabilities as a charge in our income 
statement.  In that event, our earnings would be reduced by the amount of 
regulatory assets, net of regulatory liabilities, after applicable deferred
income taxes.  Based on the balances of TEP's regulatory assets and 
liabilities at December 31, 1998, if we had ceased applying FAS 71 to all 
of TEP's regulated operations, we would have recorded an extraordinary loss
of approximately $145 million, net of the related deferred income tax
benefit of $96 million.  However, we would not write-off the regulatory 
assets, net of regulatory liabilities, if we are authorized to recover 
these amounts through the remaining regulated portion of our business.  
Approximately 62% of TEP's net regulatory assets on the balance sheet 
relate to electric generation.  While regulatory orders and market 
conditions may affect our cash flows, our cash flows would not be affected
if we stopped applying FAS 71.

     If we stop applying FAS 71, we would need to evaluate the likelihood 
that we could recover the cost of TEP's electric plant in the marketplace.
If undiscounted cash flows are less than the carrying value of plant assets
that we continue to own, then we would need to write off as an expense a 
portion of plant assets to reflect their current market value.  Plant 
assets to be disposed of would be written down to fair value if it is 
less than carrying value.  We cannot predict if we would write off any 
plant assets as a result of these evaluations.

     In addition, if we stop applying FAS 71, we would change the way that 
we account for our capital leases.  If we had not used FAS 71 in 1998, 
1997 and 1996, our lease expense included on our income statements would 
have been higher by $21 million, $20 million, and $21 million, 
respectively.  Also, if TEP had not applied FAS 71, no amortization or 
interest expense relating to the Springerville Unit 1 Allowance would have 
been recorded.  See Notes 1 and 2 of Notes to Consolidated Financial 
Statements, Nature of Operations and Significant Accounting Policies, 
Springerville Unit 1 Allowance, and TEP's Regulatory Assets and 
Liabilities, Deferred Lease Expense.

     We expect that TEP will stop accounting for its generation operations 
using FAS 71 when the ACC approves a cost recovery plan specific to TEP 
which includes the amount of stranded costs that TEP can recover and a 
cost recovery method.  See Competition, Retail for a discussion of the 
ACC order regarding stranded cost recovery.  Until the ACC approves the 
amount and recovery method, we are unable to predict the amount of 
write-offs, if any, or other changes in asset and liability values, 
which would be recorded at that time.


MARKET RISKS
- ------------

     We are potentially exposed to various forms of market risk.  Changes 
in interest rates, returns on marketable securities, changes in foreign 
currency exchange rates, and changes in commodity prices may affect our 
future financial results.  TEP currently uses derivative commodity 
instruments such as forward contracts to buy or sell energy for trading 
purposes, but does not use derivative financial instruments for either 
trading or speculative purposes.  TEP continues to evaluate to what extent,
if any, it may use derivative financial and commodity instruments in the 
normal course of its future business.  NEV, which is accounted for as a 
50% owned equity investment of Millennium, is also exposed to changes in 
the market price of electricity.  As an equity investment, our exposure
to NEV is restricted to the amount of our investment, advances and
guarantees which are described in Note 5 of Notes to Consolidated
Financial Statements, Unregulated Energy Businesses.

     For additional information concerning risk factors, including
market risks, see Safe Harbor for Forward-Looking Statements below.

     Interest Rate Risk

     Exposure to interest rate changes relates to TEP's long-term debt 
obligations.  At December 31, 1998, the fair value of TEP's long-term debt 
is estimated at $1.2 billion.  We considered the principal amounts of 
variable rate debt outstanding to be reasonable estimates of their fair
value.  We calculated the present value of the cash flows of each fixed 
rate obligation based on rates consistent with market yields for bonds 
with similar characteristics with respect to: credit rating, time-to-
maturity, and the tax status of the bond coupon for Federal income tax 
purposes.  The fair value of TEP's long-term debt at December 31, 1998 
exceeded the carrying value by $15 million.  The change in the fair value 
of our long-term debt resulting from a hypothetical one-half percent 
change in interest rates is not a material exposure to TEP.  However, TEP's
long-term debt includes $329 million of variable rate debt, and any
significant changes in interest rates could impact TEP's net income and 
cash flows.  The average interest rates on TEP's variable rate debt for 
1998 and 1997 were 3.51% and 3.70%, respectively.  See Note 8 of Notes 
to Consolidated Financial Statements, Fair Value of TEP's Financial 
Instruments.

     Marketable Securities Risk

     Exposure to fluctuations in the return on marketable securities
relates to TEP's investment in debt securities.  At December 31, 1998, 
TEP had marketable debt securities with an estimated fair value of 
$22.1 million, which exceeded the carrying value by $4.3 million.

     Foreign Currency Exchange Risk

     Exposure to changes in foreign currency exchange rates may arise 
from transactions conducted by Nations Energy in foreign currencies.  
Nations Energy's investment in a power project in the Czech Republic is 
heavily leveraged.  Approximately one third of the project's debt is 
denominated in US Dollars, one third in German Deutschmarks, and one 
third in Czech Corunas.  The project bears the risk that the value of 
the debt in each currency changes with changes in the applicable exchange 
rates as well as the risk that the amount of interest due each period 
changes with changes in the applicable exchange rates.  The impact on 
UniSource Energy's equity in earnings of the project in the income 
statement for October through December 1998, the period of Nations 
Energy's ownership, was not material to the consolidated financial 
statements for the year.  However, as additional draws of debt are made,
management expects the amount of exchange risk and resulting fluctuations 
in these earnings to increase in 1999.  Earnings from the project could 
vary significantly from month to month due to recording the impact of
this exchange rate risk.

     Commodity Price Risk

     Exposure to changes in commodity prices at TEP relates to changes in 
the market price of electricity, as well as changes in fuel costs incurred 
to generate electricity.  TEP competes with other utilities, power 
marketers and independent power producers in the sale of electric capacity 
and energy in the wholesale market.  The participants in this market trade
not only electricity and natural gas as commodities, but also derivative 
commodity instruments such as futures, forwards, swaps, options and other
instruments.  This market is largely unregulated and most transactions 
are conducted on an over-the-counter basis, there being no central clearing
mechanism (except in the case of specific instruments traded on the 
commodity exchanges).  Power marketers, whether or not affiliated with 
other entities, generally do not own production facilities and obtain 
orders from FERC permitting sales at market based rates.

     TEP enters into forward contracts to buy or sell energy at a
specified price at a future date.  These contracts are considered to
be derivative commodity instruments.  Generally, TEP commits to future 
sales based on expected excess generating capability.  However, rather 
than producing additional power, TEP may enter into a forward purchase 
contract to satisfy the forward sales contract if the market prices are 
favorable.  The forward sales contracts that are satisfied with forward 
purchase contracts do not require any physical delivery of energy by TEP.

     However, to take advantage of anticipated market opportunities,
TEP is at various times in a net open position.  A net open position
means it has either committed to sell more electricity than it has
purchase contracts to cover or it has committed to purchase more
power than it needs for its selling commitments.  To limit exposure
to price risk, TEP has trading policies with limits as to total open
positions.  TEP continually reviews its trading policies and limits
to respond to the constantly changing market conditions.  TEP
measures its market risk exposure by comparing its open positions to
the estimated market value of the positions.  The market prices used
to determine fair value are estimated based on various factors
including broker quotes, exchange, over the counter prices and time
value.  As of December 31, 1998, the fair value of these derivative
commodity instruments and the potential near term gains or losses in
future earnings, cash flows or fair values resulting from reasonably
possible near term changes in market prices are not material to the
results of operations, cash flows or financial position of TEP.

     TEP is exposed to credit risk in its energy trading activities
related to potential nonperformance by counterparties under the terms of 
their contractual agreements.  TEP manages the risk of counterparty 
default by performing financial credit reviews of its counterparties and 
through the use of standardized agreements which allow for the netting 
of positive and negative exposures associated with a single counterparty.  
In addition, TEP may require collateral to support trading positions from 
certain counterparties.  TEP does not anticipate any nonperformance by 
any of its counterparties and had no reserves related to nonperformance 
at December 31, 1998.  TEP did not experience any material counterparty 
default during the year ended December 31, 1998.

     TEP also purchases coal and small amounts of natural gas in the
normal course of business for fuel for its generating plants.  TEP
acquires its coal under long-term coal supply contracts.  Purchases
of gas comprise only 3% of total generation.  Changes in gas prices
do not present a material risk to TEP.  See Fuel Supply for additional 
information on TEP's coal contracts and gas purchases.


IMPACT OF THE YEAR 2000 ON COMPUTER SYSTEMS AND APPLICATIONS
- ------------------------------------------------------------

     Our Year 2000 (Y2K) efforts began in 1996 and involve the inventory, 
assessment, remediation and testing of our operational and business 
systems. Our goal is to provide uninterrupted electric service and to 
process business transactions at year 2000 and beyond.  We believe that 
all identified mission critical systems and applications within our 
control will be Y2K ready by June 30, 1999.  We believe that all identified
business critical systems and applications within our control will be 
Y2K ready by September 30, 1999.  Y2K ready means the systems have been 
checked for date processing and are expected to operate properly for 
their specific business requirements into year 2000.

     State of Readiness

     We have completed an inventory and assessment for each of TEP's
critical and non-critical information systems and embedded technologies.  
The following areas are being addressed: control and embedded systems; 
enterprise information systems; suppliers; and subsidiaries.

Control and Embedded Systems - We are reviewing the control and embedded 
systems of TEP's utility plant including generation units partly owned 
but not operated by TEP. Many of these systems are critical to the power 
generation, transmission and distribution of electric service.  The 
inventory and assessment stages of this program were completed by 
September 30, 1998.

The testing and remediation efforts are 77% complete for the critical 
systems and are scheduled to be completed by June 30, 1999.  Major 
upgrades are in process for the Energy Management (SCADA) System and 
for power generation systems.  All protective field devices are prepared
for Y2K.

Enterprise Information Systems - We began the remediation, replacement, 
or upgrade of these systems in 1996.  We expect to complete this process 
by the end of second quarter 1999.  The following systems are included:
         
Department or Area            Comments
- ------------------            -------- 
Customer Services, Billing,   The Customer Information System is Y2K
Receivables                   ready.  However, the current version
                              of the underlying software upon which
                              the system is built is not yet Y2K
                              compliant.  We expect an updated
                              release of the software, which is Y2K
                              compliant, to be installed before the
                              end of the second quarter of 1999.

Human Resources, Payroll      Y2K ready - System installed in 1993
                              and upgraded to be Y2K ready in 1998.

Work Management               The system is Y2K ready.  However, the
                              current version of the underlying
                              software upon which the system is
                              built is not Y2K compliant.  We expect
                              an updated release of the software,
                              which is Y2K compliant, to be
                              installed before the end of the second
                              quarter of 1999.

General Ledger, Fixed         Scheduled for replacement in second
Assets, Projects              quarter 1999. Current systems are now
                              being remediated as a contingency with
                              scheduled completion date in second
                              quarter 1999.

Accounts Payable,             Y2K ready - Remediation completed in
Purchasing, Inventory         1998.
        
Testing of the current general ledger and fixed assets applications
continued in the first quarter of 1999 to cover additional month end
closings.  Upgrades to the operating system software are scheduled
through the second quarter 1999.  An integrated test is then scheduled 
for the third quarter 1999 of the enterprise hardware, operating software, 
and major applications with year 2000 date processing.

Suppliers - We have identified the major vendors from whom we buy
goods or services for the generation, transmission and distribution
of electrical service.  We are working with these vendors to determine 
their plans and to investigate any potential impact on TEP.  Major vendors
of other TEP business areas are also being reviewed for Y2K compliance.

Millennium Subsidiaries - We have contacted NEV, Nations Energy, and
Global Solar to determine their state of readiness.  These companies
will be monitored to ensure plans are in place to avoid Y2K disruptions.

     Costs

     From 1996 through December 31, 1998, we have expensed $800,000
addressing the Y2K issue.  This amount does not include major system
replacement costs that, along with other functional changes, addressed 
Y2K issues.  A $1.35 million budget has been established for Y2K project 
costs, and all remediation costs will be expensed as incurred.

     Risks

     Currently we believe that all identified modifications to systems 
that TEP operates will be made within the required time frames.  Despite 
our efforts, we cannot be certain that all Y2K problems with the systems 
we operate will be identified and remediated in a timely manner.  Although
we do not expect any of our potential Y2K problems to be major, it is 
possible that such failure could disrupt the generation, transmission 
or distribution of electric energy or the billing and collection process.

     We cannot assure that the systems or parties we do not control
are prepared for Y2K, or how this may effect TEP.  As an example, the loss 
of communications systems supplied by our vendors could affect our ability 
to operate generation and transmission facilities.  Also, interruptions 
of generating capacity could result from instability of the electric grid.

     TEP and other electric service providers in the WSCC are studying possible 
Y2K risks resulting from interconnected electric and information systems. 
The interconnected systems are critical to the reliability and integrity of
each electric service provider.  As an example, the failure of an 
interconnected provider to meet Y2K readiness could possibly disrupt the 
provision of electric services by utilities.  TEP and other electric 
providers in the WSCC are working together in an effort to avoid such 
disruptions.  TEP has scheduled compliance testing to coincide with the 
first North American Electric Reliability Council (NERC) industry 
coordinated drill on April 9, 1999 and the second drill on September 9, 
1999.

     Contingency Plans

     We are preparing contingency plans for the possibility that not
all remediation efforts, both internal and external, will succeed. We are 
documenting the events or scenarios that might significantly impact the 
delivery of electric service, including loss of generation, communications,
and other conditions that could result  n electric power outages. We are 
attempting to minimize the potential impact of these events with our 
draft contingency plan which we completed in 1998.  The plan includes 
developing procedures, tests, and drills to coincide with the WSCC and 
NERC plans and is scheduled to be finalized by June 30, 1999.



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

     In 1998, UniSource Energy's consolidated net income was $28.0
million or $0.87 per average share of common stock compared with $83.6 
million or $2.60 per average share of common stock in 1997, and $120.9 
million or $3.76 per average share of common stock in 1996.

     The decline in earnings in 1998 resulted primarily from the absence 
of non-cash income tax benefits related to prior period net operating 
losses, compared to amounts of tax benefits recognized in prior years.  
Losses from our unregulated energy businesses also reduced our consolidated
net income in both 1998 and 1997.

     Contribution by Business Segment

     The table below shows the contributions to our consolidated earnings 
and earnings per share by our two business segments, as well as parent 
company expenses.

<TABLE>
<CAPTION>

                                Amount in $ Millions    Per Share
                                --------------------    ---------
                                     1998    1997      1998    1997
                                     ----    ----      ----    ----
<S>                                  <C>     <C>       <C>     <C>  
Regulated Electric Utility          $41.7   $88.9     $1.30   $2.77        
Unregulated Energy Businesses        (8.1)   (5.3)    (0.25)  (0.17)
Parent Company                       (5.6)    --      (0.18)    --
                                     -----   -----     -----   -----
    Consolidated Net Income (Loss)  $28.0    $83.6    $0.87   $2.60
                                     =====   =====     =====   ===== 

</TABLE>
     

     TEP's regulated electric utility business accounts for substantially 
all of UniSource Energy's assets, revenues, and net income.  The following 
discussion is related to TEP's utility operations, unless otherwise noted. 
The results of our unregulated energy businesses are discussed in Results 
of Unregulated Energy Businesses below.  The results of the parent company 
in 1998 relate to the after-tax interest expense on the note we provided 
to TEP in exchange for the stock of Millennium.  See Interest Income, 
below.  Prior to 1998, the unregulated energy businesses now held by
Millennium were held by and consolidated with TEP.

     Utility Sales and Revenues

     Retail sales of electricity are affected primarily by customer
growth, weather and other consumption factors.  In addition to these
factors, price changes contribute to changes in retail revenues.

     In 1998, kWh sales to retail customers increased by 2.1% compared 
with 1997.  This sales increase resulted from an increase in the average 
number of retail customers.  The average number of retail customers grew 
by 2.2% to 320,744 in 1998.  KWh sales to retail customers grew by 2.4% 
in 1997 compared with 1996.  The average number of retail customers 
increased by 2.3% in 1997.  Usage by mining customers increased in 1997 
with the addition of service to a reactivated mine.

     Revenues from sales to retail customers increased by less than
1.0% in 1998 compared with 1997.  The increase in kWh sales noted above 
was offset by the effect of a 1.1% across-the-board rate reduction 
retroactive to July 1, 1998.  In addition, TEP recorded a $4.4 million 
reduction in revenues resulting from a change in the method of estimating 
unbilled revenues.  In 1997, revenues from sales to retail customers were 
2.1% greater than in 1996 as a result of the higher kWh sales discussed 
above.  Lower average prices to large mining customers from contract 
renegotiations and extensions somewhat offset the effects of higher KWh 
sales in 1997.

     TEP makes sales for resale on both a firm and interruptible basis 
to the extent generating capacity is not needed for providing energy to 
TEP's retail customers.  TEP also enters into short-term energy sale 
transactions that are offset by similar purchase transactions.  See 
Regulated Electric Utility Operations, Sales for Resale.  Rates for 
short-term energy sales are typically substantially below rates determined 
on a fully allocated cost of service basis, but, in all instances, rates
exceed the level necessary to recover fuel and other variable costs.  
KWh sales for resale increased by 32% in 1998 compared with 1997, while 
revenues from sales for resale increased by 47% for the same period, driven
by higher market prices in the wholesale energy market.  Factors
contributing to the higher market prices include higher natural gas
prices and the tightening of excess capacity in the region.  In 1997, kWh 
sales for resale increased by 2% while the related revenues increased 
by 16% over 1996.

     TEP's non-cash revenue from the Amortization of the MSR Option
Gain Regulatory Liability was zero in 1998, $8.1 million in 1997 and
$20.1 million in 1996.  This regulatory liability was fully amortized 
as of May 1997.  If we exclude the revenue from the MSR Option Gain 
amortization, total operating revenues would have been 7% higher in 
1998 than in 1997 and 4% higher in 1997 than in 1996.

     Fuel and Purchased Power Expense

     Fuel and Purchased Power expense increased by 18% in 1998
compared with 1997.  Fuel expense at TEP's generating plants actually 
declined slightly, while purchased power costs more than doubled.  This 
increase in purchased power expense is related to the large increase in 
wholesale energy sales in 1998.  Fuel and Purchased Power expense increased
in 1997 relative to 1996 because of increased energy requirements to meet
increased kWh sales.  See Market Risks, Commodity Price Risk, above.  The 
average cost of fuel per kWh generated was 1.70 cents, 1.77 cents, and 1.83
cents for 1998, 1997, and 1996, respectively.  In 1998 and 1997, fuel
expense included $3.8 million and $1.9 million related to the amortization
of the $50 million contract termination fee paid to TEP's major coal
supplier.  See Note 2 of Notes to Consolidated Financial Statements,
TEP's Regulatory Assets and Liabilities, Deferred Springerville Coal
Termination Fee.

     Other Operating Expenses

     Excluding the increase in Fuel and Purchased Power expense, other 
operating expenses were slightly lower in 1998 compared with 1997. 
Significant changes in specific operating expense categories in 1998 
compared with 1997 or in 1997 compared with 1996 are described below.

     Expenses related to consulting fees caused Other Operations
expense to increase in 1997 compared with 1996.  Such consulting fees 
consisted of payments to NEV made prior to the exercise in September 1997 
of the option to acquire a 50% interest in NEV.

     Depreciation and Amortization expense increased in 1998 over 1997 due
to depreciation on additions to property in 1998.  Depreciation and 
Amortization expense was lower in 1997 relative to 1996.  In January 1997, 
TEP completed a three year amortization (at a rate of $14 million per year)
of Springerville Unit 2 rate synchronization costs established in the 1994
Rate Order.  TEP also extended the depreciable life for its pollution 
control facilities as required by the 1996 Rate Order.

     Taxes Other Than Income Taxes decreased in 1997 versus 1996.  A
charge of $7.3 million was recorded in the third quarter of 1996 related 
to a court ruling on contested sales tax assessments.  Lower property 
taxes in 1997 also contributed to the variance.  See Note 10 of Notes to 
Consolidated Financial Statements, Contingencies.

     Voluntary Severance Plan Expense of $2.9 million in 1997 represents 
VSP expense related to post-retirement benefits other than pensions 
recorded in the first quarter.  The $10.6 million net expense in 1996 
reflects implementation of TEP's Voluntary Severance Plan in the second 
quarter of 1996 and related pension settlements.  The VSP was accepted by 
approximately 200 employees, or 15% of the total workforce.

     Income tax expense included in Operating Expenses increased in 1997 
compared with 1996 related to an increase in pre-tax operating income, 
net of interest expense.

     Other Income (Deductions)

     Income Tax Benefits

      UniSource Energy and TEP recognized zero, $43.4 million and $88.6 
million of NOL benefit in 1998, 1997 and 1996, respectively.   This 
reduced NOL benefit recognition and changes in tax expense resulting from 
changes in income before taxes, caused the 1998 income tax benefits 
included in Other Income (Deductions) to decrease by $34.0 million and 
$40.6 million for UniSource Energy and TEP, respectively, from 1997 levels.
For the same reasons, the 1997 income tax benefits included in Other Income
(Deductions) decreased by $53.5 million and $50.5 million for UniSource 
Energy and TEP, respectively, from 1996 levels.

      UniSource Energy and TEP recognize NOL benefits based on changes in 
the estimated amount of prior period NOLs that are likely to be used on 
future tax returns.  A significant factor in estimating this amount is the 
average annual book income before taxes for the prior three years. In 
future periods when the NOLs are used on tax returns to reduce income 
taxes paid, the income tax expense shown on the income statements will not 
be reduced.

      At December 31, 1997, both UniSource Energy and TEP had recorded the 
amount of prior period NOL benefit that we expect to use on future income 
tax returns.  At the present time, we are not able to estimate additional 
amounts of NOL benefit that we may recognize in the income statements of 
either UniSource Energy or TEP.  This is because there are still open tax 
years for which additional assessments may be made and because federal and
state NOL carryforwards expire at various dates.  We do not expect to
recognize additional amounts of NOL benefit until these items are resolved.

     Reversal of Loss Provision

     TEP recorded a $10.2 million Reversal of Loss Provision in the
second quarter of 1997 when it dissolved certain subsidiaries which were 
part of TEP's former investment operations.  TEP recorded an $8.5 million 
Reversal of Loss Provision in 1996 when TEP's non-energy related 
subsidiaries satisfied approximately $8.5 million of short-term debt 
obligations by assigning finance receivables held by those subsidiaries.

     Interest Income

     TEP's income statement for 1998 includes $9.3 million of interest 
income on the promissory note TEP received from UniSource Energy in 
exchange for the transfer of its stock in Millennium.  See Note 1 of 
Notes to the Consolidated Financial Statements, Nature of Operations 
and Summary of Significant Accounting Policies, Basis of Presentation. 
On UniSource Energy's income statement, this income is eliminated as an 
inter-company transaction.

     Income (Losses) from Unregulated Energy Businesses

     Our Unregulated Energy Business Investments contributed a netloss of 
$8.1 million in 1998, compared with a net loss of $5.3 million in 1997 and
a net loss of $2.3 million in 1996.  See Results of Unregulated Energy 
Businesses, below for more information on the results of this business 
segment.

     Interest Expense

     Interest expense increased in 1998 relative to 1997.  Higher letter of
credit fees for TEP's new Credit Agreement, as well as higher interest 
rates from the refinancing of certain variable rate debt obligations with 
fixed rate debt obligations accounted for a substantial part of the 
increase.  TEP also incurred higher interest expense in 1998 when new bonds
were issued and interest expense was accrued for periods up to 75 days 
before the redemption of old bonds.  These refinancings benefit TEP by 
extending debt maturities and reducing the risk of changes in variable 
interest rates.  In December 1998, TEP redeemed $30 million of its 8.50% 
First Mortgage Bonds due in 2009.  This redemption will reduce interest 
expense in future periods.

     Interest Expense on Long-Term Debt increased in 1997 over 1996 as a 
result of the refinancing of certain variable and fixed rate debt 
obligations with unsecured fixed rate debt obligations, having later 
maturity dates, at higher interest rates, as well as higher average 
interest rates on TEP's variable rate debt obligations.  The weighted 
average interest rate on TEP's tax-exempt variable rate debt obligations 
was 3.7% in 1997 and 3.5% in 1996, excluding letter of credit fees.

     See Investing and Financing Activities, Bond Issuance and
Redemption, and Note 7 of Notes to the Consolidated Financial Statements, 
TEP's Long-Term Debt and Capital Lease Obligations.

     Other Interest Expense was lower in 1997 than in 1996 due to
$1.9 million in interest expense incurred in the third quarter of1996 
related to the 1996 contested sales tax assessment of $7.3 million.


  RESULTS OF UNREGULATED ENERGY BUSINESSES

     The table below provides a breakdown by subsidiary of the net
losses recorded by our Unregulated Energy Businesses for the three
years ended December 31, 1998.

<TABLE>
<CAPTION>

                                     Amounts in $ Millions
- --------------------------------------------------------------------
Subsidiary                       1998          1997        1996
- --------------------------------------------------------------------
<S>                              <C>           <C>         <C>
AET                             $(0.3)       $(0.6)       $(0.1)
MEH                              (9.2)        (4.5)         --
Nations Energy                    1.4          0.2         (2.1)
Other                             0.0         (0.4)        (0.1)
- --------------------------------------------------------------------
Total Millennium                $(8.1)       $(5.3)       $(2.3)
- --------------------------------------------------------------------
                                               
</TABLE>


     AET and Global Solar

     AET's net losses in the period 1996 through 1998 represent ongoing 
developmental costs at its 50% owned investment, Global Solar.  Small-
scale manufacturing of thin film photovoltaic cells is scheduled to begin 
in 1999.

     MEH and NEV

     Net losses from MEH's equity investment in NEV were the primary 
contributors to net losses at Millennium in 1998 and 1997.  NEV's losses 
in 1998 resulted from:

     --  narrow margins on energy sales;
     --  gross margin that does not yet support administrative costs,
         including start-up costs associated with expansion into
         additional regions of the country; and
     --  recognition of one-time losses from adverse sales commitments
         resulting from contracts made prior to the start of operations.

     NEV's losses in 1997 resulted primarily from start-up costs for
business development in anticipation of the opening of the California 
electricity market to competition in 1998.  In addition to amounts 
recorded as losses from unregulated businesses in 1997, TEP recorded an 
additional $6.3 million (pre-tax) in consulting expenses related to NEV.  
These funds were paid to NEV during the first eight months of 1997, 
prior to the exercise of the option to acquire a 50% interest in NEV.

     NEV incurred a total loss of $47 million for the period September 
1997 through December 1998.  In 1998 and 1997, MEH recorded $16 million 
and $7.8 million, respectively, of NEV's losses.  These losses, totaling 
$23.8 million, equal the total funds and unsecured commitments provided 
by MEH and UniSource Energy to NEV.  The amount of NEV's loss to be 
recorded by MEH is limited to the total amount invested and committed by 
MEH and UniSource Energy on an unsecured basis.  Should MEH or UniSource 
Energy provide additional unsecured funding to NEV, or should there be a 
decline in the value of the collateral which secures the outstanding 
secured loans from UniSource Energy to NEV, the unsecured amounts provided
would be immediately expensed up to the lesser of the amount of unsecured 
funding provided or the amount of NEV's cumulative losses in excess of the 
$23.8 million already recorded by MEH.  While UniSource Energy does not 
currently have plans to extend additional unsecured amounts, there can be 
no assurance that additional funding will not be necessary.

     See Investing and Financing Activities, UniSource Energy, Parent 
Company Financing Activities, Loans and Guarantees, below.

      Nations Energy

      Nations Energy reported net income of $1.4 million in 1998.  A
$5.8 million after-tax gain on the sale of a 48% investment in Trigen-
Nations Energy was largely offset by expenses for new project development. 
In 1997, Nations Energy reported a small profit, primarily due to its 
share of partnership income from its investment in Trigen-Nations Energy, 
which exceeded expenses recorded for new project development.  Nations 
Energy is also exploring external financing options to support its growth 
in new projects.  There can be no assurance that any such financing will 
be obtained.


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

  UniSource Energy

     Our ability to pay cash dividends on common stock outstanding
depends, in part, on the cash flow from our subsidiary companies, TEP and 
Millennium.  TEP is our primary operating subsidiary and comprises 
substantially all of UniSource Energy's assets.  In December 1998, TEP 
declared and paid a $30 million cash dividend to UniSource Energy.

     Our Board of Directors may consider the declaration and payment
of a cash dividend to the common shareholders of UniSource Energy during 
1999.  We will consider several factors in making this decision, including:

     --  the capital needs of our affiliates;
     --  our earnings;
     --  our business prospects; and
     --  the impact and status of deregulation in Arizona.

  TEP

     In December 1998, TEP declared and paid a dividend of $30 million 
UniSource Energy, its sole shareholder.  TEP declared the dividend from 
current year earnings since TEP has an accumulated deficit, rather than 
positive retained earnings.

     TEP had not paid a dividend since 1989.  TEP suspended its dividend 
in 1989 due to financial difficulties which led to the Financial 
Restructuring in 1992.  After the Financial Restructuring, TEP did not pay
a dividend due, in part, to various restrictions in its debt agreements.  
During 1998, TEP redeemed or exchanged those series of First Mortgage Bonds
that previously prevented TEP from paying dividends unless specific cash 
flow coverage and retained earnings tests were met.  See Investing and 
Financing Activities, below.

     TEP can pay dividends if it maintains compliance with the TEP
Credit Agreement and certain financial covenants, including a covenant that
requires TEP to maintain a minimum level of net worth.  As of December 31,
1998, the required minimum net worth was $183 million.  TEP's actual net 
worth at December 31, 1998 was $230 million.  See Investing and Financing 
Activities, TEP Bank Credit Agreement, below.  As of December 31, 1998, 
TEP was in compliance with the terms of the Credit Agreement.

     The ACC Holding Company Order states that TEP may not pay dividends 
to UniSource Energy in excess of 75% of its earnings until TEP's equity 
ratio equals 37.5% of total capital (excluding capital lease obligations).
As of December 31, 1998, TEP's equity ratio on that basis was 16.3%.  TEP 
is in compliance with this order.

     In addition to these limitations, the Federal Power Act states
that dividends shall not be paid out of funds properly included in the 
capital account.  Although the terms of the Federal Power Act are unclear,
we believe that there is a reasonable basis to pay dividends from current
year earnings.


INCOME TAX POSITION
- -------------------

     At December 31, 1998, UniSource Energy and TEP had, for federal income
 tax purposes:

     --  $377 million of NOL carryforwards expiring in 2005 through
         2009;
     --  $23 million of unused ITC expiring in 2002 through 2005;
     --  $18 million of AMT credit which will carry forward to
         future years.

      Due to the issuance of common stock to various creditors of TEP in 
1992, a change in TEP ownership was deemed to have occurred for tax 
purposes in December 1991.  As a result, our use of the NOL and ITC 
generated before 1992 may be limited under the tax code.  The IRS is 
challenging our calculation of this limitation. See Income Tax Assessments 
in Note 10 of Notes to Consolidated Financial Statements.  At December 31, 
1998, pre-1992 federal NOL and ITC carryforwards which are subject to the 
limitation were approximately $209 million and $23 million, respectively.  
The $168 million of post-1992 federal NOL at December 31, 1998, is not 
subject to the limitation.


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

  CASH FLOWS

     Overview of UniSource Energy Cash Flows and Liquidity

     Net cash flows from operating activities increased in aggregate by 
$36 million in 1998 compared with 1997.  The increase was mainly due to 
lower cash payments for contract termination fees to the Springerville 
coal supplier.  TEP paid $10 million to the coal supplier in 1998 compared 
to a payment of $40 million in 1997.  See Note 2 of Notes to Consolidated 
Financial Statements, TEP Regulatory Assets and Liabilities, Deferred 
Springerville Contract Termination Fee.  Excluding contract termination 
fee payments, net cash flows from operating activities increased by $7 
million to $173 million from $166 million in 1997.

     Net cash outflows for investing activities increased by $34 million 
in 1998 compared with 1997. Construction expenditures at TEP increased by 
$9 million, while investments and loans to Unregulated Energy Businesses 
increased by $25 million.  See Investing and Financing Activities, below 
for a discussion of historical and forecasted construction expenditures 
and investments in unregulated energy businesses.

     Net cash outflows for financing activities increased in aggregate by 
$19 million in 1998 compared with 1997.  TEP completed several bond 
issuance transactions in 1998 and used the proceeds to redeem First 
Mortgage Bonds that prohibited the payment of dividends.  In addition, 
in December 1998, TEP redeemed $30 million of its 8.50% First Mortgage 
Bonds due in 2009 to reduce interest expense in future periods.  See 
Investing and Financing Developments below.

     As a result of activities described above, cash and cash equivalents 
decreased by $1 million from the 1997 year-end balance of $146 million to
the 1998 year-end balance of $145 million.  Our consolidated cash balance,
including cash equivalents, at March 8, 1999, was approximately $96 
million.  We invest cash balances in high-grade money market securities 
with an emphasis on preserving the principal amounts invested.

     During 1999, UniSource Energy will require cash to fund all or
some of the following activities: investments in our Unregulated Energy 
Businesses, payment of interest on the promissory note to TEP, and 
dividends to shareholders.  We expect our sources of cash to be dividends 
from our subsidiaries, primarily TEP.  Although no specific offerings are 
currently contemplated, UniSource Energy may also issue debt and/or equity 
securities from time to time.  Our cash flows may be subject to variation 
if TEP's actual earnings differ from forecasts and the availability and 
cost of new capital.  If cash flows were to fall short of expectation, we 
would reevaluate the investment requirements of our Unregulated Energy 
Businesses and/or seek additional financing for those businesses by 
unrelated parties.

     TEP Cash Flows and Liquidity

     TEP's net cash flows from operating activities increased in
aggregate by $56 million in 1998 compared with 1997.  The increase was 
mainly due to lower cash payments for contract termination fees to the 
Springerville coal supplier.  TEP paid $10 million to the coal supplier 
in 1998 compared to a payment of $40 million in 1997.  See Note 2 of 
Notes to Consolidated Financial Statements, TEP's Regulatory Assets and 
Liabilities, Deferred Springerville Contract Termination Fee.  Excluding 
contract termination fee payments, net cash flows from operating 
activities increased by $26 million to $192 million from $166 million 
in 1997.

     Net cash outflows for investing activities increased by $50 million 
in 1998 compared with 1997. Construction expenditures at TEP increased 
by $9 million, while investments and loans to Unregulated Energy 
Businesses decreased by $5 million.  Prior to January 1, 1998, the 
Unregulated Energy Businesses were subsidiaries of TEP.  Additionally, 
the transfer of Millennium and its $45 million of cash from TEP to 
UniSource Energy on January 1, 1998 is reflected as a use of cash on 
TEP's statement of cash flows.  The subsidiaries holding that cash were 
subsidiaries of TEP at year-end 1997, and became subsidiaries of UniSource 
Energy on January 1, 1998.  See Investing and Financing Activities, below 
for a discussion of historical and forecasted construction expenditures.

     Net cash outflows for financing activities increased in aggregate 
by $50 million in 1998 compared with 1997.  In addition to the bond 
issuance and redemption activity described above, TEP paid a $30 million 
cash dividend to UniSource Energy in the fourth quarter of 1998.  See 
Investing and Financing Activities below.

     As a result of activities described above, TEP's cash and cash
equivalents decreased by $28 million from the 1997 year-end balance of 
$146 million to the 1998 year-end balance of $118 million.  TEP's
consolidated cash balance, including cash equivalents, at March 8, 1999,
was approximately $76 million.

     After capital expenditures, scheduled debt maturities and payments 
to retire capital lease obligations, TEP's net cash flows available for 
other investing and financing activities were $83.0 million in 1998, 
$40.1 million in 1997, and $36.8 million in 1996.  During 1999, TEP 
expects to generate sufficient internal cash flows to fund its operating 
activities, construction expenditures, required debt maturities, and to 
pay dividends to UniSource Energy.  However, TEP's cash flows may vary 
due to changes in wholesale revenues, changes in short-term interest 
rates, and other factors. If cash flows were to fall short of expectations,
TEP would rely on existing cash balances and, if necessary, borrowings 
under the Revolving Credit.


 INVESTING AND FINANCING ACTIVITIES

     TEP-REGULATED ELECTRIC UTILITY
     ------------------------------

     Capital Expenditures

     TEP's actual capital expenditures for the years 1996 through 1998, 
along with estimated amounts for the years 1999 through 2003, are shown 
below:

<TABLE>
<CAPTION>

                              ($ in millions)
                -------------------------------------------
                           Actual               Estimated
                -------------------------------------------
                 <S>         <C>        <C>          <C>
                 1996        $ 68       1999         $  88
                 1997          72       2000            72
                 1998          81       2001            75
                                        2002            68
                                        2003            64
                                       -------------------
                                       TOTAL          $367
                                       ===================

</TABLE>

     The estimated capital expenditures for the five years 1999-2000 break 
down in the following categories:

     --  $237 million for transmission, and distribution and corporate
         facilities in the Tucson area.
     --  $124 million for existing production facilities.
     --  $4 million to upgrade pollution control facilities at Navajo.
         See Item 1., Business, Environmental Matters.
     --  $2 million for pollution control facilities at San Juan.  See
         Item 1., Business, Environmental Matters.

     These estimated expenditures include costs for TEP to comply with 
current federal and state environmental regulations.  All of these 
estimates are subject to continuing review and adjustment.  Actual 
construction expenditures may be different from these estimates due to 
changes in business conditions, construction schedules, environmental 
requirements, and changes to our business arising from retail competition. 
TEP plans to fund these expenditures through internally generated cash 
flow.

     Bond Issuance and Redemption

     During 1998, TEP issued $386.9 million in new bonds and redeemed 
$416.4 million of bonds.  TEP achieved the following objectives with 
this refinancing activity:

      --  extended maturities,
      --  replaced variable rate debt with fixed rate debt, and
      --  eliminated restrictive covenants contained in existing
          First Mortgage Bonds.

          Bonds Issued in 1998
         ---------------------
         <TABLE>
         <CAPTION>
          
                                Amount    Rate   Maturity  Security
         ----------------------------------------------------------------------
                             ($ millions)
         <S>                    <C>       <C>      <C>     <C>
         1998 Apache A IDBs     $ 83.7    5.85%    2028    Unsecured
         1998 Apache B IDBs       99.8    5.875%   2033    Unsecured
         1998 Apache C IDBs       16.5    5.85%    2026    Unsecured
         12.22% Exchange Series
           FMBs                   46.9   12.22%    2000    First Mortgage
         First Collateral Trust    
           Bonds,7.50% Series    140.0    7.50%    2008    First Mortgage Bonds
         -----------------------------------------------------------------------
                Total           $386.9
         =======================================================================
         </TABLE>

       
     The 12.22% Exchange Series First Mortgage Bonds were issued in
exchange for the same amount of outstanding bonds having substantially 
the same terms, except that the new bonds do not have a covenant 
restricting the payment of dividends.

     The First Collateral Trust Bonds are collateralized by an equal
principal amount of bonds issued under TEP's General First Mortgage
and held by the trustee.  If the General First Mortgage is discharged, 
these First Mortgage Bonds would be replaced with an equal amount of 
bonds issued under the General Second Mortgage.  If the General Second 
Mortgage is discharged, these Second Mortgage Bonds would be surrendered 
and the First Collateral Trust Bonds would become unsecured obligations 
of TEP.

         Bonds Redeemed in 1998
         ----------------------
         <TABLE>
         <CAPTION>

                            Amount      Rate    Maturity  Security
      --------------------------------------------------------------------------
                         ($ millions)
      <S>                   <C>         <C>       <C>     <C>
      1981 Apache A IDBs    $100.0      Variable  2020    Second Mortgage Bonds
      1981 Apache B IDBs     100.0      Variable  2021    First Mortgage Bonds
      First Mortgage Bonds    15.0      8.50%     1999    First Mortgage
      First Mortgage Bonds    25.0      8.125%    2001    First Mortgage
      First Mortgage Bonds    40.0      7.65%     2003    First Mortgage
      First Mortgage Bonds    25.0      7.55%     2002    First Mortgage
      First Mortgage Bonds    78.8(a)  12.22%     2000    First Mortgage
      First Mortgage Bonds    32.1      8.50%     2009    First Mortgage
      1976 Farmington      
       (sinking fund)          0.5      7.50%     2006    First Morgage Bonds
      --------------------------------------------------------------------------
                Total       $416.4
      ==========================================================================
      <FN>
      (a)   $31.9 million were redeemed and $46.9 million were
            surrendered in exchange for the newly issued 12.22%
            Exchange Series Bonds.

     </TABLE>


     When TEP redeemed all of its First Mortgage Bonds due in 1999, 2001, 
2002, and 2003, as well as the $31.9 million of 12.22% First Mortgage Bonds
due 2000 not tendered for exchange as described above, it eliminated 
covenants that prohibited the payment of common stock dividends.  See 
Dividends on Common Stock.

     TEP Bank Credit Agreement

     TEP has a $441 million Credit Agreement with a number of banks
which matures on December 30, 2002.  The agreement consists of a $100 
million Revolving Credit Facility and a $341 million Letter of Credit 
Facility.  The Revolving Credit Facility is used to provide liquidity for 
general corporate purposes.  The Letter of Credit Facility supports $329 
million aggregate principal amount of tax-exempt variable rate debt.  
The facilities are secured by Second Mortgage Bonds ($441 million aggregate
principal amount).  The Credit Agreement contains several financial 
covenants, including interest coverage, leverage and net worth tests.  
As of December 31, 1998, TEP was in compliance with these financial 
covenants.  See Restrictive Covenants below.

     The original amount of the Credit Agreement was $544 million.
During 1998, TEP redeemed its $100 million 1981 Series A Apache County 
Pollution Control Revenue Bonds.  These bonds were supported by a $103 
million letter of credit provided under the Credit Agreement.  When the 
bonds were redeemed, the letter of credit supporting the bonds was 
cancelled and the Credit Agreement decreased by $103 million.

     If TEP borrows under the Revolving Credit Facility, the borrowing 
costs would be at a variable interest rate consisting of a spread over 
LIBOR or an alternate base rate.  The spread is based upon a pricing grid 
tied to the credit rating on TEP's senior secured debt.  Also, TEP pays a 
commitment fee on the unused portion of the Revolving Credit Facility, and
a fee on the Letter of Credit Facility.  These fees are also dependent on 
TEP's credit ratings.  At December 31, 1998, the commitment fee was 0.375% 
per year, and the letter of credit fee (excluding letter of credit fronting
fees of 0.125%) was 1.375% per year.  TEP had no borrowings outstanding
under the Revolving Credit Facility at December 31, 1998.

     Springerville Common Facilities Leases

     Under the terms of the Springerville Common Facilities lease
agreement, the secured notes underlying this lease must be refinanced or 
refunded by December 31, 1999 in order to avoid a special event of loss 
under the lease.  If a special event of loss were to occur, TEP would be 
required to repurchase the facilities for an amount equal to the higher 
of the stipulated loss value ($144 million) or the fair market value of 
the facilities.  Upon such purchase, the lease would be terminated.  Based 
on the current amortization schedule for these notes, a principal amount 
of approximately $70 million will be outstanding as of December 31, 1999.  
Interest on the lease notes is currently paid at a variable rate of 
interest equal to the Federal Funds rate plus 0.625%.  TEP has the intent
and the ability to cause the underlying debt on these leases to be 
refinanced in 1999.

     Tax-Exempt Local Furnishing Bonds

     TEP has financed a substantial portion of utility plant assets with 
industrial development revenue bonds issued by the Industrial Development 
Authorities of Pima County and Apache County.  The interest on these bonds
is excluded from gross income of the bond holder for federal tax purposes.
This exclusion is allowed because the facilities qualify as facilities for 
the local furnishing of electric energy as defined by the Internal Revenue
Code.  These bonds are sometimes referred to as tax-exempt local furnishing
bonds.  To qualify for this exclusion, the facilities must be part of a 
system providing electric service to customers within not more than two 
contiguous counties.  TEP provides electric service to retail customers 
in the City of Tucson and certain other portions of Pima County, Arizona 
and to Fort Huachuca in contiguous Cochise County, Arizona.

     As of December 31, 1998, TEP had approximately $580 million of
tax-exempt local furnishing bonds outstanding.  In addition, approximately 
$98 million of debt related to the Irvington Unit 4 lease obligation was 
issued as tax-exempt local furnishing bonds.  TEP has financed the 
following facilities, in whole or in part, with the proceeds of tax-exempt 
local furnishing bonds: Springerville Unit 2, Irvington Unit 4, a dedicated
345-kV transmission line from Springerville Unit 2 to TEP's retail service 
area (the Express Line), and a portion of TEP's local transmission and 
distribution system in the Tucson metropolitan area.

     Any of the following events might cause TEP to have to redeem or 
defease some or all of these bonds:

     --  the introduction of retail competition in Arizona;
     --  asset divestiture;
     --  changes in tax laws; or
     --  changes in system operations.

The introduction of retail competition and expanded wholesale competition 
could affect TEP's system.  However, TEP does not expect its system to 
change in a manner that would cause a loss of tax exemption on its 
tax-exempt local furnishing bonds.  For example, TEP does not expect to 
lose its qualification as a local furnishing system if an independent 
system operator is established (see Item 1. Business, Rates and Regulation,
Wholesale Transmission Access) or due to future sales of electricity on a 
competitive retail basis outside of the current two-county service area.  
However, if TEP were to divest its generating assets or to change its use 
of the Express Line, up to $325 million of tax-exempt local furnishing
bonds might have to be redeemed or defeased by TEP.  TEP cannot provide 
assurances as to the continued qualification of its local furnishing 
facilities, in whole or in part, as a result of the possible events listed 
above.

     Restrictive Covenants

     General First Mortgage Covenants
     --------------------------------

     TEP's General First Mortgage creates a first mortgage lien on and 
security interest in most of TEP's utility plant assets.  Springerville 
Unit 2, which is owned by San Carlos, is not subject to this lien and 
security interest.  Under the General First Mortgage TEP may issue 
additional First Mortgage Bonds on the basis of:

     (1)  up to 60% of net utility property additions; and
     (2)  the principal amount of retired First Mortgage Bonds.

In general, the amount of First Mortgage Bonds that TEP can issue is
also subject to a net earnings test.  The test must show that TEP's
net earnings for 12 consecutive months within the preceding 15 months are 
at least two (2.0) times the annual interest requirements on all 
outstanding First Mortgage Bonds (including the new bonds).

     At December 31, 1998, TEP had the ability to issue approximately 
$26 million of new First Mortgage Bonds on the basis of property additions,
as described above.  TEP also had the ability to issue about $475 million 
of new First Mortgage Bonds on the basis of retired First Mortgage Bonds.

     However, TEP's Credit Agreement allows no more than $411 million of 
First Mortgage Bonds to be outstanding.  There were $278 million of First 
Mortgage Bonds outstanding at December 31, 1998.  Additionally, the 
Credit Agreement contains certain financial covenants that limit the amount
of new debt obligations TEP may issue.  See Credit Agreement Covenants 
below.  Currently, TEP has no plans to issue additional First Mortgage 
Bonds.

     General Second Mortgage Covenants
     ---------------------------------

     TEP's General Second Mortgage creates a second mortgage lien on and 
security interest in most of TEP's utility plant assets.  This lien does 
not cover assets owned by San Carlos. Under the General Second Mortgage 
TEP may issue additional Second Mortgage Bonds on the basis of:

     (1)  up to 70% of net utility property additions; and
     (2)  the principal amount of retired First and Second Mortgage
          Bonds.

In general, the amount of Second Mortgage Bonds that TEP can issue
is also subject to a net earnings test.  The test must show that TEP's net 
earnings for 12 consecutive months within the preceding 16 months are at 
least 1 3/4 times the annual interest requirements on all outstanding 
First Mortgage Bonds and Second Mortgage Bonds (including the new bonds).

     If TEP issued Second Mortgage Bonds based on retired First Mortgage 
Bonds, the amount of retired First Mortgage Bonds available to issue new 
First Mortgage Bonds would be reduced by the same amount.

     At December 31, 1998, TEP had the ability to issue about $546
million of new Second Mortgage Bonds on the basis of net property additions
as described above.  Also, TEP had the ability to issue approximately $628 
million of new Second Mortgage Bonds on the basis of retired bonds.  Using 
an interest rate of 7.5%, the net earnings test would allow such new 
issuances of Second Mortgage Bonds.  These calculations assume that no 
additional First Mortgage Bonds would be issued other than to refund First 
Mortgage Bonds outstanding at December 31, 1998.  However, issuance of 
these amounts would be limited by financial covenants in TEP's bank Credit 
Agreement.   See Investing and Financing Activities, TEP Bank Credit
Agreement and Restrictive Covenants, Credit Agreement Covenants for
information regarding the Credit Agreement which is secured by $441
million in aggregate principal amount of Second Mortgage Bonds.

     Credit Agreement Covenants
     --------------------------

     TEP's Credit Agreement contains a number of restrictive covenants 
including restrictions on:

     --  additional indebtedness,
     --  liens,
     --  sale of assets or mergers, and
     --  sale-leasebacks.

     TEP must also maintain several financial covenants.  The table below 
includes a brief description of each covenant, the requirement and TEP's 
actual results for the period ended December 31, 1998.


<TABLE>
<CAPTION>

                                      December 31, 1998
                              ---------------------------------
Covenant                          Requirement        Actual
- -------------------------------------------------------------------
<S>                               c>                <C>
Minimum Consolidated Tangible 
Net Worth (equal to the sum of
$133 million plus 40% of          
cumulative Consolidated Net
Income since January 1, 1997)      $183 million      $230 million

Minimum Cash Coverage Ratio           1.3               1.6

Maximum Leverage Ratio                7.0               6.4

</TABLE>

     See Dividends on Common Stock for a discussion of the effects
of such covenants on TEP's ability to declare or pay dividends.

     See Investing and Financing Activities, TEP Bank Credit Agreement 
for more information regarding the Credit Agreement.


  MILLENNIUM--UNREGULATED ENERGY BUSINESSES
  -----------------------------------------

     Capital Requirements

     Our Unregulated Energy Businesses owned by Millennium required
significant amounts of capital in 1998 and we expect these needs to
continue in the near future.  Actual investments in and loans to
Unregulated Energy Business, net of distributions from joint
ventures, for the years 1996 through 1998, and forecasted amounts
for the years 1999 through 2001 are shown below:

<TABLE>
<CAPTION>
                           ($ millions)
            ---------------------------------------------
                       Actual                 Forecast
            ---------------------------------------------
            <S>          <C>        <C>          <C>
            1996        $  9       1999         $  30
            1997           5       2000            35
            1998          30       2001            20


</TABLE>

     The $30 million in capital for 1998 was invested in the
following subsidiaries:

     --  $33 million of funding to NEV.
     --  $2 million of investments in AET and Global Solar.
     --  offset by $5 million in net cash inflows from Nations
         Energy.  Cash proceeds of $21 million from the sale of
         Nations Energy's investment in the Coors project exceeded cash
         requirements of $15 million for other investments by Nations
         Energy in 1998.

     Forecasted investments for the years 1999-2001 are subject to
continuing review and revision.  These forecasts contain assumptions
for each subsidiary regarding investment opportunities, growth strategies, 
and potential investments by unaffiliated parties.  Actual expenditures 
may be higher or lower than these forecasts, or may be allocated to our 
businesses in proportions different than planned.  Our ability to fund 
future capital requirements of our unregulated business segment will 
depend to a great extent on the amount and predictability of the 
dividends we receive from our primary operating subsidiary, TEP.


   UNISOURCE ENERGY-PARENT COMPANY FINANCING ACTIVITIES
   ----------------------------------------------------

     Promissory Note to TEP

     On January 1, 1998, TEP and UniSource Energy completed a transaction 
by which all outstanding shares of TEP common stock were exchanged, on a 
share-for-share basis, for shares of UniSource Energy common stock.  
Following the share exchange, TEP transferred the stock of its subsidiary, 
MEH Corporation (now Millennium) to UniSource Energy in exchange for a 
$95 million ten-year promissory note from UniSource Energy.  The 
promissory note was issued in accordance with the ACC Order authorizing 
the formation of the holding company.  The interest rate on the note 
issued to TEP is 9.78%.  Interest is payable every two years beginning 
January 1, 2000.

     Warrant Exchange Offer

     From August 18, 1998 through October 23, 1998, UniSource Energy
offered to exchange outstanding warrants previously issued by TEP.
At the time of the exchange offer, there were approximately 12.1 million 
aggregate number of TEP Warrants outstanding.  TEP Warrants entitle the 
holder of five warrants to purchase one share of TEP common stock for 
$16.00.  Currently, UniSource Energy owns 100% of the common stock of TEP
and TEP common stock is not publicly traded.  In order to provide TEP 
Warrant holders with the opportunity to obtain warrants exercisable into 
UniSource Energy common stock, which is listed and has an established 
market, we offered to exchange UniSource Energy Warrants for TEP Warrants.
Each whole new UniSource Energy Warrant entitles the holder to purchase 
one share of UniSource Energy common stock for $16.00.  For each TEP 
Warrant, the tendering holders received:

     --  0.20 UniSource Energy Warrant, expiring March 15, 1999; and
     --  0.20 UniSource Energy Warrant, expiring December 15, 2000.

     The warrant exchange offer expired on October 23, 1998. Approximately 
1.5 million UniSource Energy Warrants of each series were issued in 
exchange for approximately 7.5 million tendered TEP Warrants.  
Approximately 4.6 million TEP Warrants were not tendered for exchange and 
retain the right to purchase, upon payment of the exercise price, TEP 
common stock.  The shares of TEP common stock issued as a result of any 
exercise of TEP Warrants would not be exchangeable for UniSource Energy 
common stock.

     Direct Stock Purchase Plan

     UniSource Energy established a direct stock purchase plan, called 
the Investment Plus Plan, in the third quarter of 1998.  The Investment 
Plus Plan provides a method of investing directly in our common stock 
without brokerage commissions or service charges.

     Restrictions on Proceeds of Equity Issuance

     Pursuant to the ACC Holding Company Order, 60% of the proceeds
of any public equity issuance undertaken by UniSource Energy in its
first five years of operations must be used to reduce TEP's debt or
add to TEP's equity account.

     Loans and Guarantees

     Effective September 1, 1997, MEH exercised an option to acquire a 
50% ownership in NEV and made a $0.8 million capital contribution.

     In December 1997, MEH committed to provide NEV with $20 million of 
funding.  At December 31, 1998, NEV had received $19 million in debt 
funding under the commitment, resulting in a remaining commitment amount 
available of $1 million at January 31, 1999.  Additionally, in September 
1998, NEV issued a $4.8 million promissory note to MEH for a $3 million 
member loan MEH extended to NEV in September 1997, as well as preferred 
operating return due MEH under the terms of NEV's original operating 
agreement.

     In December 1998, UniSource Energy committed $30 million in
credit to NEV.  NEV has drawn $15 million on the credit commitment at 
December 31, 1998.  Under the terms of the commitment, NEV must provide 
collateral prior to any amounts being drawn under this credit commitment.

     Additionally, in August 1998, UniSource Energy guaranteed a $10 
million loan that NEV obtained from an unrelated party.  That loan is due 
in 1999.  UniSource Energy is the guarantor of $33.6 million of performance
bonds and other guarantees that secure amounts NEV may owe to the utility 
distribution companies (UDCs) and energy suppliers in connection with 
NEV's sales to retail electric customers.  NEV bills its customers for 
these charges.  UniSource Energy's guarantees are secured by various NEV 
accounts receivable and other assets.


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

     UniSource Energy and TEP are 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 for UniSource Energy
or TEP in this Annual Report on Form 10-K.  Forward-looking statements 
include statements concerning plans, objectives, goals, strategies, 
future events or performance and underlying assumptions and other 
statements which are not statements of historical facts.  Forward-looking 
statements may be identified by the use of words such as anticipates, 
estimates, expects, intends, plans, predicts, projects, and similar 
expressions.  From time to time, we 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 UniSource Energy or TEP, are expressly qualified by these 
cautionary statements and any other cautionary statements which may 
accompany the forward-looking statements.  In addition, UniSource Energy 
and TEP disclaim any obligation to update any forward-looking statements
to reflect events or circumstances after the date of this report.

     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.  We express our expectations, 
beliefs and projections in good faith and believe them to have a 
reasonable basis.  However, we make no assurances that management's 
expectations, beliefs or projections will be achieved or accomplished.  
We have identified the following important factors that could cause 
actual results to differ materially from those discussed in our forward-
looking statements. These may be in addition to other factors and matters 
discussed in other parts of this report:

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 TEP's retail service area.

3. Changes affecting TEP's cost of providing electrical service
   including 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, and rate
   structures.

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 UniSource Energy or TEP.

7. Y2K disruptions resulting from unidentified or unremediated
   problems for systems which we control, and Y2K disruptions
   resulting from systems or parties which we do not control.



ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
- -----------------------------------------------------------------------

     See Item 7. _ Management's Discussion and Analysis of Financial
Condition and Results of Operations, Factors Affecting Results of
Operations, Market Risks.


ITEM 8. CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
- -----------------------------------------------------------------------

     See Item 14, page 116, for a list of the Consolidated Financial
Statements which are included in the following pages.  See Note 17
of Notes to Consolidated Financial Statements.   

<PAGE>


INDEPENDENT AUDITORS' REPORT


UniSource Energy Corporation and its Stockholders
Tucson Electric Power Company


We have audited the accompanying consolidated balance sheets and
statements of capitalization of UniSource Energy Corporation and its
subsidiaries (the Company) as of December 31, 1997, and the related
consolidated statements of income, changes in stockholders' equity
(deficit), and cash flows for each of the two years in the period
ended December 31, 1997.  We have also audited the accompanying
consolidated balance sheets and statements of capitalization of
Tucson Electric Power Company and its subsidiaries (TEP) as of
December 31, 1997, and the related consolidated statements of income, 
changes in stockholder's equity (deficit), and cash flows for each of 
the two years in the period ended December 31, 1997.  These financial 
statements are the responsibility of the Company's and TEP's management.
Our responsibility is to express an opinion on these financial 
statements based on our audits.

We conducted our audits in accordance with generally accepted auditing 
standards.  Those standards require that we plan and perform the audit 
to obtain reasonable assurance about whether the financial statements 
are free of material misstatement.  An audit includes examining, on a 
test basis, evidence supporting the amounts and disclosures in the 
financial statements.  An audit also includes assessing the accounting 
principles used and significant estimates made by management, as well 
as evaluating the overall financial statement presentation.  We believe 
that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, 
in all material respects, the financial position of the Company and TEP
at December 31, 1997, and the results of their operations and their cash
flows for each of the two years in the period ended December 31, 1997 
in conformity with generally accepted accounting principles.



Deloitte & Touche LLP
Tucson, Arizona
February 23, 1998 (March 11, 1999 as to information with respect to
1997 and 1996 periods in Note 4 and in Note 12)



<PAGE>


REPORT OF INDEPENDENT ACCOUNTANTS


To the Board of Directors and Stockholders of
UniSource Energy Corporation and
to the Board of Directors of
Tucson Electric Power Company


In our opinion, the accompanying consolidated balance sheets and
statements of capitalization and the related consolidated statements
of income, of changes in stockholders' equity, and of cash flows
present fairly, in all material respects, the financial position of
UniSource Energy Corporation and its subsidiaries (the Company) and
Tucson Electric Power Company and its subsidiaries (TEP) at December
31, 1998, and the results of their operations and their cash flows
for the year in conformity with generally accepted accounting
principles. These financial statements are the responsibility of the
Company's and TEP's management; our responsibility is to express an
opinion on these financial statements based on our audit. We
conducted our audit of these statements in accordance with generally
accepted auditing standards which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting
principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe
that our audit provides a reasonable basis for the opinion expressed
above. The financial statements of the Company and of TEP at
December 31, 1997 and for the years ended December 31, 1997 and 1996
were audited by other independent accountants whose report dated
February 23, 1998, except as to Notes 4 and 12 which are as of March
11, 1999, expressed an unqualified opinion on those statements.



PricewaterhouseCoopers LLP
Los Angeles, California
February 4, 1999

<PAGE>


                                      
UNISOURCE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF INCOME              Years Ended December 31,
                                             1998        1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Operating Revenues
 Retail Customers                        $ 625,407   $ 624,221   $ 611,564
 Amortization of MSR Option Gain
  Regulatory Liability                           -       8,105      20,053
 Sales for Resale                          143,269      97,567      84,256
- ---------------------------------------------------------------------------
    Total Operating Revenues               768,676     729,893     715,873
- ---------------------------------------------------------------------------
Operating Expenses
 Fuel and Purchased Power                  255,527     216,163     208,808
 Capital Lease Expense                     104,045     103,914     104,087
 Amortization of Springerville
  Unit 1 Allowance                         (30,522)    (28,037)    (29,090)
 Other Operations                          109,170     107,199      97,555
 Maintenance and Repairs                    36,143      36,657      36,449
 Depreciation and Amortization              90,358      86,405      98,246
 Taxes Other Than Income Taxes              50,395      51,339      61,902
 Voluntary Severance Plan Expense - Net          -       2,933      10,555
 Income Taxes                               18,372      19,297       9,795
- ---------------------------------------------------------------------------
    Total Operating Expenses               633,488     595,870     598,307
- ---------------------------------------------------------------------------
      Operating Income                     135,188     134,023     117,566
- ---------------------------------------------------------------------------
Other Income (Deductions)
 Income Taxes                                4,537      38,563      92,016
 Reversal of Loss Provision                      -      10,154       8,472
 Interest Income                            10,866      11,239       6,460
 Unregulated Energy Businesses - Net        (8,109)     (5,344)     (2,284)
 Other Income (Deductions)                   3,150       1,812       1,484
- ---------------------------------------------------------------------------
    Total Other Income (Deductions)         10,444      56,424     106,148
- ---------------------------------------------------------------------------
Interest Expense
 Long-Term Debt                             72,672      66,247      59,836
 Interest Imputed on Losses Recorded at
  Present Value                             34,179      32,657      32,599
 Other Interest Expense                     10,749       7,971      10,427
- ---------------------------------------------------------------------------
    Total Interest Expense                 117,600     106,875     102,862
- ---------------------------------------------------------------------------
Net Income                               $  28,032   $  83,572   $ 120,852
===========================================================================
Average Shares of
 Common Stock Outstanding (000)             32,178      32,138      32,136
===========================================================================
Basic Earnings Per Share                 $    0.87   $    2.60   $    3.76
===========================================================================
Diluted Earnings Per Share               $    0.87   $    2.59   $    3.75
===========================================================================

See Notes to Consolidated Financial Statements.


UNISOURCE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
                                                Years Ended December 31,
                                                1998      1997      1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Cash Flows from Operating Activities
  Cash Receipts from Retail Customers        $ 670,793 $ 664,294 $ 653,933
  Cash Receipts from Sales for Resale          141,210    96,569    80,123
  Fuel and Purchased Power Costs Paid         (238,722) (203,713) (180,134)
  Wages Paid, Net of Amounts Capitalized       (67,132)  (60,398)  (71,519)
  Payment of Other Operations and
   Maintenance Costs                           (88,713)  (83,154)  (76,531)
  Capital Lease Interest Paid                  (81,823)  (83,019)  (84,383)
  Interest Paid, Net of Amounts Capitalized    (71,072)  (66,625)  (64,025)
  Taxes Paid, Net of Amounts Capitalized       (99,590)  (99,126)  (86,310)
  Tax Assessment and Interest Deposit Paid      (2,078)        -   (23,019)
  Contract Termination Fee Paid                (10,000)  (40,000)        -
  Emission Allowance Inventory Purchases             -   (11,503)  (12,340)
  Emission Allowance Inventory Sales            11,368        39    14,712
  Interest Received                             10,149     9,152     6,342
  Income Taxes Paid                             (5,113)     (984)   (1,566)
  Other                                         (6,532)    4,751    (2,351)
- ---------------------------------------------------------------------------
    Net Cash Flows - Operating Activities      162,745   126,283   152,932
- ---------------------------------------------------------------------------
Cash Flows from Investing Activities
  Capital Expenditures                         (81,148)  (72,475)  (68,272)
  Investments in and Loans to Unregulated
   Energy Business                             (50,682)   (7,117)   (9,173)
  Distributions from Unregulated Energy
   Businesses                                   20,750     2,119         -
  Other Investments - Net                          186       968       328
- ---------------------------------------------------------------------------
    Net Cash Flows - Investing Activities     (110,894)  (76,505)  (77,117)
- ---------------------------------------------------------------------------
Cash Flows from Financing Activities
  Proceeds from Issuance of Long-Term Debt      99,511    16,928    16,725
  Proceeds from Borrowings Under Renewable
   Term Loan                                         -         -    14,000
  Payments to Retire Long-Term Debt           (129,472)     (500)  (11,600)
  Payments on Renewable Term Loan                    -   (31,000)  (14,000)
  Payments to Retire Capital Lease Obligations (17,232)  (13,229)  (36,292)
  Payments for Credit Agreement and Debt
   Issuance Costs                               (7,719)   (7,470)     (804)
  Other                                          1,972     1,458     1,353
- ---------------------------------------------------------------------------
    Net Cash Flows - Financing Activities      (52,940)  (33,813)  (30,618)
- ---------------------------------------------------------------------------
Net Increase (Decrease) in
 Cash and Cash Equivalents                      (1,089)   15,965    45,197
Cash and Cash Equivalents, Beginning of Year   146,256   130,291    85,094
- ---------------------------------------------------------------------------
Cash and Cash Equivalents, End of Year       $ 145,167 $ 146,256 $ 130,291
===========================================================================

See Note 15 for supplemental cash flow information.
See Notes to Consolidated Financial Statements.

UNISOURCE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
                                                         December 31,
                                                       1998        1997
- ---------------------------------------------------------------------------
                                                   - Thousands of Dollars -

ASSETS
Utility Plant
  Plant in Service                                  $2,263,871  $2,194,150
  Utility Plant Under Capital Leases                   886,902     893,064
  Construction Work in Progress                         74,050      72,404
- ---------------------------------------------------------------------------
    Total Utility Plant                              3,224,823   3,159,618
  Less Accumulated Depreciation and Amortization    (1,051,994)   (982,621)
  Less Accumulated Amortization of Capital Leases      (85,826)    (73,728)
  Less Springerville Unit 1 Allowance                 (171,413)   (167,756)
- ---------------------------------------------------------------------------
    Total Utility Plant - Net                        1,915,590   1,935,513
- ---------------------------------------------------------------------------
Investments and Other Property                         110,318      79,471
- ---------------------------------------------------------------------------
Current Assets
  Cash and Cash Equivalents                            145,167     146,256
  Accounts Receivable                                   72,767      71,225
  Materials and Fuel                                    37,040      34,005
  Deferred Income Taxes - Current                       14,820      14,910
  Other                                                 24,950      22,954
- ---------------------------------------------------------------------------
    Total Current Assets                               294,744     289,350
- ---------------------------------------------------------------------------
Deferred Debits - Regulatory Assets
  Income Taxes Recoverable Through Future Revenues     152,111     170,034
  Deferred Springerville Generation Costs              102,211     117,889
  Deferred Lease Expense                                 9,877      11,571
  Other Regulatory Assets                               18,886      11,089
Deferred Debits - Other                                 30,443      19,492
- ---------------------------------------------------------------------------
    Total Deferred Debits                              313,528     330,075
- ---------------------------------------------------------------------------
Total Assets                                        $2,634,180  $2,634,409
===========================================================================

CAPITALIZATION AND OTHER LIABILITIES
Capitalization
  Common Stock Equity                               $  246,646  $  216,878
  Capital Lease Obligations                            889,543     890,257
  Long-Term Debt                                     1,184,423   1,215,120
- ---------------------------------------------------------------------------
    Total Capitalization                             2,320,612   2,322,255
- ---------------------------------------------------------------------------

Current Liabilities
  Current Obligations Under Capital Leases              11,647      14,552
  Current Maturities of Long-Term Debt                   1,725         500
  Accounts Payable                                      34,118      33,141
  Interest Accrued                                      70,771      64,812
  Taxes Accrued                                         27,167      24,397
  Accrued Employee Expenses                             15,207      13,832
  Contract Termination Fee Payable                           -      10,000
  Other                                                  6,705       6,987
- ---------------------------------------------------------------------------
    Total Current Liabilities                          167,340     168,221
- ---------------------------------------------------------------------------

Deferred Credits and Other Liabilities
  Deferred Income Taxes - Noncurrent                    62,028      77,606
  Deferred Investment Tax Credits Regulatory
   Liability                                            10,436      11,905
  Emission Allowance Gain Regulatory Liability          31,335      17,591
  Other                                                 42,429      36,831
- ---------------------------------------------------------------------------
    Total Deferred Credits and Other Liabilities       146,228     143,933
- ---------------------------------------------------------------------------
Commitments and Contingencies (Note 10)
- ---------------------------------------------------------------------------
Total Capitalization and Other Liabilities          $2,634,180  $2,634,409
===========================================================================

See Notes to Consolidated Financial Statements.






































UNISOURCE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CAPITALIZATION
                                                          December 31,
                                                        1998 1997
- ---------------------------------------------------------------------------
COMMON STOCK EQUITY                                 - Thousands of Dollars -

 Common Stock--No Par Value                         $  640,640  $  638,904
                               1998         1997
                           -----------  -----------
  Shares Authorized         75,000,000   75,000,000
  Shares Outstanding        32,257,963   32,139,434
  Warrants Outstanding       2,984,822            -
 Accumulated Deficit                                  (393,994)   (422,026)
- ---------------------------------------------------------------------------
    Total Common Stock Equity                          246,646     216,878
- ---------------------------------------------------------------------------
PREFERRED STOCK
 No Par Value, 1,000,000 Shares Authorized,
 None Outstanding                                            -           -
- ---------------------------------------------------------------------------
CAPITAL LEASE OBLIGATIONS
 Springerville Unit 1                                  494,408     483,421
 Springerville Coal Handling Facilities                166,288     168,959
 Springerville Common Facilities                       123,835     127,986
 Irvington Unit 4                                      114,316     121,150
 Other Leases                                            2,343       3,293
- ---------------------------------------------------------------------------
   Total Capital Lease Obligations                     901,190     904,809
   Less Current Maturities                             (11,647)    (14,552)
- ---------------------------------------------------------------------------
    Total Long-Term Capital Lease Obligations          889,543     890,257
- ---------------------------------------------------------------------------
LONG-TERM DEBT
                                         Interest
        Issue              Maturity        Rate
- ---------------------------------------------------------------------------
First Mortgage Bonds
  Corporate                  2009          8.50%        27,900     165,000
                             2000         12.22%        46,878      78,750
  Industrial Development  2006 - 2008 6.10% to 7.50%    63,500      64,000
   Revenue Bonds (IDBs)      2021         Variable**         -     100,000
  First Collateral Trust
   Bonds                     2008          7.50%       140,000           -
Second Mortgage Bonds
 (IDBs)*                  2018 - 2022     Variable**   328,600     428,600
Unsecured IDBs            2020 - 2033 5.85% to 7.13%   579,270     379,270
- ---------------------------------------------------------------------------
   Total Stated Principal Amount                     1,186,148   1,215,620
   Less Current Maturities                              (1,725)       (500)
- ---------------------------------------------------------------------------
    Total Long-Term Debt                             1,184,423   1,215,120
- ---------------------------------------------------------------------------
Total Capitalization                                $2,320,612  $2,322,255
===========================================================================

*  These IDBs are backed by LOCs under TEP's Credit Agreement.  TEP's
obligations under the Credit Agreement are secured with Second Mortgage
Bonds.

**  Interest Rates on variable rate tax-exempt debt (IDBs) ranged from 2.83%
to 4.59% during 1998 and 1997, and averaged 3.51% in 1998 and 3.70% in 1997.


See Notes to Consolidated Financial Statements.





















































UNISOURCE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY


                                                                  Accumulated
                                                      Common       Earnings
                                                      Stock        (Deficit)
- -----------------------------------------------------------------------------
                                                     - Thousands of Dollars -

Balances at December 31, 1995                        $638,938      $(626,450)
  1996 Net Income                                           -        120,852
  2,886 Shares Issued under Stock Compensation Plans       47              -
  3,881 Shares Issued under Reverse Stock Split for
   Shareholders with Fractional Shares                      -              -
  6,537 Net Shares Purchased by Deferred
   Compensation Trust Less Distributions                  (99)             -
- -----------------------------------------------------------------------------
Balances at December 31, 1996                         638,886       (505,598)
  1997 Net Income                                           -         83,572
  6,630 Shares Issued Under Stock Compensation Plans      108              -
  5,687 Net Shares Purchased by Deferred
   Compensation Trust Less Distributions                  (90)             -
- -----------------------------------------------------------------------------
Balances at December 31, 1997                         638,904       (422,026)
  1998 Net Income                                           -         28,032
  116,696 Shares Issued Under Stock Compensation Plans  1,709              -
  1,833 Net Shares Distributed by Deferred
   Compensation Trust Less Purchases                       27              -
- -----------------------------------------------------------------------------
Balances at December 31, 1998                        $640,640      $(393,994)
=============================================================================

We describe limitations on our ability to pay dividends in Note 9.

See Notes to Consolidated Financial Statements.























TUCSON ELECTRIC POWER COMPANY
CONSOLIDATED STATEMENTS OF INCOME              Years Ended December 31,
                                             1998        1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Operating Revenues
 Retail Customers                        $ 625,721   $ 624,221   $ 611,564
 Amortization of MSR Option Gain
  Regulatory Liability                           -       8,105      20,053
 Sales for Resale                          143,269      97,567      84,256
- ---------------------------------------------------------------------------
    Total Operating Revenues               768,990     729,893     715,873
- ---------------------------------------------------------------------------
Operating Expenses
 Fuel and Purchased Power                  255,527     216,163     208,808
 Capital Lease Expense                     104,045     103,914     104,087
 Amortization of Springerville
  Unit 1 Allowance                         (30,522)    (28,037)    (29,090)
 Other Operations                          109,170     107,199      97,555
 Maintenance and Repairs                    36,143      36,657      36,449
 Depreciation and Amortization              90,358      86,405      98,246
 Taxes Other Than Income Taxes              50,395      51,339      61,902
 Voluntary Severance Plan Expense - Net          -       2,933      10,555
 Income Taxes                               18,372      19,297       9,795
- ---------------------------------------------------------------------------
    Total Operating Expenses               633,488     595,870     598,307
- ---------------------------------------------------------------------------
      Operating Income                     135,502     134,023     117,566
- ---------------------------------------------------------------------------
Other Income (Deductions)
 Income Taxes                                  794      41,401      91,950
 Reversal of Loss Provision                      -      10,154       8,472
 Interest Income                            10,800      11,239       6,460
 Interest Income - Note Receivable from
  UniSource Energy                           9,329           -           -
 Other Income (Deductions)                   2,851      (6,370)       (734)
- ---------------------------------------------------------------------------
    Total Other Income (Deductions)         23,774      56,424     106,148
- ---------------------------------------------------------------------------
Interest Expense
 Long-Term Debt                             72,672      66,247      59,836
 Interest Imputed on Losses Recorded at
  Present Value                             34,179      32,657      32,599
 Other Interest Expense                     10,749       7,971      10,427
- ---------------------------------------------------------------------------
    Total Interest Expense                 117,600     106,875     102,862
- ---------------------------------------------------------------------------
Net Income                               $  41,676   $  83,572   $ 120,852
===========================================================================

See Notes to Consolidated Financial Statements.








TUCSON ELECTRIC POWER COMPANY
CONSOLIDATED STATEMENTS OF CASH FLOWS             Years Ended December 31,
                                                1998      1997      1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Cash Flows from Operating Activities
  Cash Receipts from Retail Customers        $ 670,793 $ 664,294 $ 653,933
  Cash Receipts from Sales for Resale          141,210    96,569    80,123
  Fuel and Purchased Power Costs Paid         (238,722) (203,713) (180,134)
  Wages Paid, Net of Amounts Capitalized       (62,622)  (60,398)  (71,519)
  Payment of Other Operations and
   Maintenance Costs                           (81,676)  (83,154)  (76,531)
  Capital Lease Interest Paid                  (81,823)  (83,019)  (84,383)
  Interest Paid, Net of Amounts Capitalized    (71,072)  (66,625)  (64,025)
  Taxes Paid, Net of Amounts Capitalized       (99,091)  (99,126)  (86,310)
  Tax Assessment and Interest Deposit Paid      (2,078)        -   (23,019)
  Contract Termination Fee Paid                (10,000)  (40,000)        -
  Emission Allowance Inventory Purchases             -   (11,503)  (12,340)
  Emission Allowance Inventory Sales            11,368        39    14,712
  Interest Received                              8,517     9,152     6,342
  Income Taxes Paid                             (3,883)     (984)   (1,566)
  Other                                            937     4,751    (2,351)
- ---------------------------------------------------------------------------
    Net Cash Flows - Operating Activities      181,858   126,283   152,932
- ---------------------------------------------------------------------------
Cash Flows from Investing Activities
  Capital Expenditures                         (81,011)  (72,475)  (68,272)
  Transfer of Millennium Cash to UniSource
   Energy                                      (45,412)        -         -
  Investments in and Loans to Unregulated
   Energy Businesses                                 -    (7,117)   (9,173)
  Distributions from Unregulated Energy
   Businesses                                        -     2,119         -
  Other Investments - Net                          104       968       328
- ---------------------------------------------------------------------------
    Net Cash Flows - Investing Activities     (126,319)  (76,505)  (77,117)
- ---------------------------------------------------------------------------
Cash Flows from Financing Activities
  Proceeds from Issuance of Long-Term Debt      99,511    16,928    16,725
  Proceeds from Borrowings Under
   Renewable Term Loan                               -         -    14,000
  Payments to Retire Long-Term Debt           (129,472)     (500)  (11,600)
  Payments on Renewable Term Loan                    -   (31,000)  (14,000)
  Dividend Paid to UniSource Energy            (30,000)        -         -
  Payments to Retire Capital Lease Obligations (17,232)  (13,229)  (36,292)
  Payments for Credit Agreement and Debt
   Issuance Costs                               (7,719)   (7,470)     (804)
  Other                                          1,353     1,458     1,353
- ---------------------------------------------------------------------------
    Net Cash Flows - Financing Activities      (83,559)  (33,813)  (30,618)
- ---------------------------------------------------------------------------
Net Increase (Decrease) in
 Cash and Cash Equivalents                     (28,020)   15,965    45,197
Cash and Cash Equivalents, Beginning of Year   146,256   130,291    85,094
- ---------------------------------------------------------------------------
Cash and Cash Equivalents, End of Year       $ 118,236 $ 146,256 $ 130,291
===========================================================================
See Note 15 for supplemental cash flow information.
See Notes to Consolidated Financial Statements.
TUCSON ELECTRIC POWER COMPANY
CONSOLIDATED BALANCE SHEETS

                                                         December 31,
                                                       1998 1997
- ---------------------------------------------------------------------------
                                                   - Thousands of Dollars -
ASSETS
Utility Plant
  Plant in Service                                  $2,263,871  $2,194,150
  Utility Plant Under Capital Leases                   886,902     893,064
  Construction Work in Progress                         74,050      72,404
- ---------------------------------------------------------------------------
    Total Utility Plant                              3,224,823   3,159,618
  Less Accumulated Depreciation and Amortization    (1,051,994)   (982,621)
  Less Accumulated Amortization of Capital Leases      (85,826)    (73,728)
  Less Springerville Unit 1 Allowance                 (171,413)   (167,756)
- ---------------------------------------------------------------------------
    Total Utility Plant - Net                        1,915,590   1,935,513
- ---------------------------------------------------------------------------
Investments and Other Property                          62,978      79,471
- ---------------------------------------------------------------------------
Note Receivable from UniSource Energy                   79,462           -
- ---------------------------------------------------------------------------
Current Assets
  Cash and Cash Equivalents                            118,236     146,256
  Accounts Receivable                                   72,239      71,225
  Materials and Fuel                                    36,995      34,005
  Deferred Income Taxes - Current                       14,820      14,910
  Other                                                 14,735      22,954
- ---------------------------------------------------------------------------
    Total Current Assets                               257,025     289,350
- ---------------------------------------------------------------------------
Deferred Debits - Regulatory Assets
  Income Taxes Recoverable Through Future Revenues     152,111     170,034
  Deferred Springerville Generation Costs              102,211     117,889
  Deferred Lease Expense                                 9,877      11,571
  Other Regulatory Assets                               18,886      11,089
Deferred Debits - Other                                 30,443      19,492
- ---------------------------------------------------------------------------
    Total Deferred Debits                              313,528     330,075
- ---------------------------------------------------------------------------
Total Assets                                        $2,628,583  $2,634,409
===========================================================================

CAPITALIZATION AND OTHER LIABILITIES
Capitalization
  Common Stock Equity                               $  229,861  $  216,878
  Capital Lease Obligations                            889,543     890,257
  Long-Term Debt                                     1,184,423   1,215,120
- ---------------------------------------------------------------------------
    Total Capitalization                             2,303,827   2,322,255
- ---------------------------------------------------------------------------

Current Liabilities
  Current Obligations Under Capital Leases              11,647      14,552
  Current Maturities of Long-Term Debt                   1,725         500
  Accounts Payable                                      37,256      33,141
  Interest Accrued                                      70,771      64,812
  Taxes Accrued                                         27,082      24,397
  Accrued Employee Expenses                             14,897      13,832
  Contract Termination Fee Payable                           -      10,000
  Other                                                  6,705       6,987
- ---------------------------------------------------------------------------
    Total Current Liabilities                          170,083     168,221
- ---------------------------------------------------------------------------

Deferred Credits and Other Liabilities
  Deferred Income Taxes - Noncurrent                    70,504      77,606
  Deferred Investment Tax Credits Regulatory Liability  10,436      11,905
  Emission Allowance Gain Regulatory Liability          31,335      17,591
  Other                                                 42,398      36,831
- ---------------------------------------------------------------------------
    Total Deferred Credits and Other Liabilities       154,673     143,933
- ---------------------------------------------------------------------------
Commitments and Contingencies (Note 10)
- ---------------------------------------------------------------------------
Total Capitalization and Other Liabilities          $2,628,583  $2,634,409
===========================================================================

See Notes to Consolidated Financial Statements.





































TUCSON ELECTRIC POWER COMPANY
CONSOLIDATED STATEMENTS OF CAPITALIZATION
                                                          December 31,
                                                        1998 1997
- ---------------------------------------------------------------------------
COMMON STOCK EQUITY                                 - Thousands of Dollars -

 Common Stock--No Par Value                         $  646,568  $  645,261
                               1998         1997
                           -----------  -----------
  Shares Authorized         75,000,000   75,000,000
  Shares Outstanding                 -   32,139,434
  Warrants Outstanding***      918,445    2,410,856
 Capital Stock Expense                                  (6,357)     (6,357)
 Accumulated Deficit                                  (410,350)   (422,026)
- ---------------------------------------------------------------------------
    Total Common Stock Equity                          229,861     216,878
- ---------------------------------------------------------------------------
PREFERRED STOCK
 No Par Value, 1,000,000 Shares Authorized,
 None Outstanding                                            -           -
- ---------------------------------------------------------------------------
CAPITAL LEASE OBLIGATIONS
 Springerville Unit 1                                  494,408     483,421
 Springerville Coal Handling Facilities                166,288     168,959
 Springerville Common Facilities                       123,835     127,986
 Irvington Unit 4                                      114,316     121,150
 Other Leases                                            2,343       3,293
- ---------------------------------------------------------------------------
   Total Capital Lease Obligations                     901,190     904,809
   Less Current Maturities                             (11,647)    (14,552)
- ---------------------------------------------------------------------------
    Total Long-Term Capital Lease Obligations          889,543     890,257
- ---------------------------------------------------------------------------
LONG-TERM DEBT
                                         Interest
        Issue              Maturity        Rate
- ---------------------------------------------------------------------------
First Mortgage Bonds
  Corporate                  2009          8.50%        27,900     165,000
                             2000         12.22%        46,878      78,750
  Industrial Development  2006 - 2008 6.10% to 7.50%    63,500      64,000
   Revenue Bonds (IDBs)      2021     Variable**             -     100,000
  First Collateral Trust
   Bonds                     2008          7.50%       140,000           -
Second Mortgage Bonds
  IDBs*                   2018 - 2022 Variable**       328,600     428,600
Unsecured IDBs            2020 - 2033 5.85% to 7.13%   579,270     379,270
- ---------------------------------------------------------------------------
   Total Stated Principal Amount                     1,186,148   1,215,620
   Less Current Maturities                              (1,725)       (500)
- ---------------------------------------------------------------------------
    Total Long-Term Debt                             1,184,423   1,215,120
- ---------------------------------------------------------------------------
Total Capitalization                                $2,303,827  $2,322,255
===========================================================================

*  These IDBs are backed by LOCs under TEP's Credit Agreement.  TEP's
obligations under the Credit Agreement are secured with Second Mortgage
Bonds.

**  Interest rates on variable rate tax-exempt debt (IDBs) ranged from 2.83%
to 4.59% during 1998 and 1997, and the average interest rate on such debt was
3.51% in 1998 and 3.70% in 1997.

***  There are 4.6 million outstanding TEP warrants which entitle the holders
to purchase one share of TEP common stock for five warrants and $16.00.  See
Note 13.

See Notes to Consolidated Financial Statements.














































TUCSON ELECTRIC POWER COMPANY
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDER'S EQUITY


                                                       Capital  Accumulated
                                            Common      Stock    Earnings
                                            Stock      Expense   (Deficit)
- ---------------------------------------------------------------------------
                                           - Thousands of Dollars -

Balances at December 31, 1995             $645,295    $(6,357)   $(626,450)
  1996 Net Income                                -          -      120,852
  2,886 Shares Issued under Stock
   Compensation Plans                           47          -            -
  3,881 Shares Issued under Reverse
   Stock Split for Shareholders with
   Fractional Shares                             -          -            -
  6,537 Net Shares Purchased by Deferred
   Compensation Trust Less Distributions       (99)         -            -
- ---------------------------------------------------------------------------
Balances at December 31, 1996              645,243     (6,357)    (505,598)
  1997 Net Income                                -          -       83,572
  6,630 Shares Issued Under Stock
   Compensation Plans                          108          -            -
  5,687 Net Shares Purchased by Deferred
   Compensation Trust Less Distributions       (90)         -            -
- ---------------------------------------------------------------------------
Balances at December 31, 1997              645,261     (6,357)    (422,026)
  1998 Net Income                                -          -       41,676
  Dividend Paid to UniSource Energy              -          -      (30,000)
  22,733 Shares Held by Deferred
   Compensation Trust Transferred to
   UniSource Energy                            373          -            -
  Other                                        934          -            -
- ---------------------------------------------------------------------------
Balances at December 31, 1998             $646,568    $(6,357)   $(410,350)
===========================================================================

We describe limitations on our ability to pay dividends in Note 9.

See Notes to Consolidated Financial Statements.


















UNISOURCE ENERGY, TEP AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1.  NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
- ----------------------------------------------------------------------------

  NATURE OF OPERATIONS

     UniSource Energy Corporation (UniSource Energy) is an exempt holding
company under the Public Utility Holding Company Act.  UniSource Energy has
no significant operations of its own, but holds the stock of Tucson Electric
Power Company (TEP) and Millennium Energy Holdings, Inc. (Millennium).  TEP,
a regulated public utility incorporated in Arizona since 1963, is UniSource
Energy's largest operating subsidiary and represents substantially all of
UniSource Energy's assets.  Millennium holds the energy-related businesses
described in Note 5.  In October 1998 Millennium, formerly a subsidiary of
MEH, and MEH Corporation (MEH), exchanged names.

     TEP generates, transmits and distributes electricity.  TEP serves retail
customers in an 1,155 square mile area in Southern Arizona.  TEP also sells
electricity to other utilities and power marketing entities primarily located
in the Western United States.  Approximately 60% of TEP's work force is
subject to a collective bargaining unit.  The collective bargaining agreement
terminated on November 30, 1998.  The collective bargaining agreement has
been extended to November 30, 1999 for Springerville Generating Station
employees in exchange for a 2.5% wage increase.  Labor and management reached
a tentative agreement on a new four-year labor contract for Tucson employees
in the first quarter of 1999.

  BASIS OF PRESENTATION

     On January 1, 1998, TEP and UniSource Energy completed a transaction by
exchanging all the outstanding common stock of TEP on a share-for-share basis
for the common stock of UniSource Energy.  In 1995, TEP's shareholders
approved the share exchange.  In 1997, the FERC and ACC approved the
formation of the holding company.

     Following the share exchange, in January 1998 TEP transferred the stock
of Millennium to UniSource Energy for a $95 million ten-year promissory note
from UniSource Energy.  In accordance with the ACC order authorizing the
formation of the holding company, the note bears interest at 9.78% payable
every two years beginning January 1, 2000.

     UniSource Energy's consolidated financial statements include the
financial results of operations of UniSource Energy and its wholly owned
subsidiaries as if UniSource Energy's current holding company structure had
existed in all periods shown.  For periods prior to January 1998, UniSource
Energy's operations and those of TEP are the same.

     UniSource Energy and TEP use the following three methods to report
investments in their subsidiaries or other companies:
   
   - Consolidation:  When we own a majority of the voting stock of a
subsidiary, we combine the accounts of the subsidiary with our accounts.  We
eliminate intercompany balances and transactions when we combine these
accounts.

   - The Equity Method:  We use the equity method to report corporate joint
ventures, partnerships, and affiliated companies when we hold a 20% to 50%
voting interest.  Under the equity method, we report:

     - Our interest in the entity as an investment at cost on our balance
sheet; and
     - Our percentage share of the net income (loss) from the entity in our
income.

   - The Cost Method:  We use the cost method when we hold less than a 20%
voting interest in an investment.  Under the cost method, we report our
investment at cost on our balance sheet.

All non-utility operating transactions are included in the Other Income
(Deductions) section of the income statements.

  USE OF ACCOUNTING ESTIMATES

     Management makes estimates and assumptions when preparing financial
statements under Generally Accepted Accounting Principles (GAAP).  These
estimates and assumptions affect:

   - A portion of the reported amounts of assets and liabilities at the dates
of the financial statements;
   - Our disclosures regarding contingent assets and liabilities at the dates
of the financial statements; and
   - A portion of the reported revenues and expenses during the financial
statement reporting periods.
   
Because these estimates involve judgments, the actual amounts may differ from
the estimates.
   
  REGULATION

     The Arizona Corporation Commission (ACC) and, in some areas, the Federal
Energy Regulatory Commission (FERC) regulate TEP's utility accounting
practices and electricity rates.  TEP generally uses the same accounting
policies and practices used by unregulated companies for financial reporting
under GAAP.  However, sometimes these principles, such as FAS 71, require
special accounting treatment for regulated companies to show the effect of
regulation.  These effects are described in Accounting for the Effects of
Regulation in Note 2.

  TEP UTILITY PLANT

     We report TEP's utility plant at its original cost.  Utility plant
includes:

   - Material and labor,
   - Contractor costs,
   - Construction overhead costs (where applicable), and
   - An Allowance for Funds Used During Construction (AFUDC).
     AFUDC reflects the cost of financing construction projects with borrowed
funds and equity funds.  The component of AFUDC attributable to borrowed
funds is included as a reduction of Other Interest Expense.  The equity
component is included in Other Income (Deductions).  In 1998, 1997 and 1996,
we imputed the cost of capital on construction expenditures at 6.30%, 5.55%
and 4.24%, respectively, to reflect the cost of using borrowed and equity
funds to finance construction.

     Depreciation

     We compute depreciation on a straight-line basis at rates based on the
economic lives of the assets.  These rates are authorized by the ACC and
averaged 3.53%, 3.44% and 3.56% in 1998, 1997 and 1996, respectively.  The
economic lives for production plant are based on remaining lives.  The
economic lives for transmission plant, distribution plant, general plant and
intangible plant are based on average lives.  The rates also reflect
estimated removal costs, net of estimated salvage value.  Minor replacements
and repairs are expensed as incurred.  Retirements of utility plant, together
with removal costs less salvage, are charged to accumulated depreciation.

  TEP UTILITY PLANT UNDER CAPITAL LEASES

     TEP financed the following assets with leases:

   - Springerville Common Facilities,
   - Springerville Unit 1,
   - Springerville Coal Handling Facilities, and
   - Irvington Unit 4.

Under GAAP, these leases qualify as capital leases.  However, for ACC rate-
making purposes, these leases are treated as operating leases with recovery
as if rent payments were made in equal amounts annually during the lease
term.  We record lease expense (interest and depreciation) on a basis which
reflects the rate-making treatment.  We describe the differences between GAAP
capital lease accounting used by unregulated companies and the ACC rate-
making method used by us in Deferred Lease Expense in Note 2.  We describe
the lease terms in Capital Lease Obligations in Note 7.

     The following table shows the amount of lease expense incurred for these
four leases and TEP's remaining leases.

                                                    Years Ended December 31,
                                                      1998    1997    1996
     -----------------------------------------------------------------------
                                                     - Millions of Dollars -
     Lease Expense:
       Interest                                      $  96   $  95   $  95
       Depreciation                                     18      17      15
     -----------------------------------------------------------------------
        Total Lease Expense                          $ 114   $ 112   $ 110
     =======================================================================

     Lease Expense Included In:
       Operating Expenses - Fuel and
        Purchased Power                               $  10   $  10   $   9
       Operating Expenses - Capital Lease
        Expense                                         104     104     104
       Balance Sheet - Deferred Lease Expense             -      (2)     (3)
     -----------------------------------------------------------------------
        Total Lease Expense                           $ 114   $ 112   $ 110
     =======================================================================

     The Deferred Lease Expense of $10 million and $12 million at December
31, 1998 and 1997, respectively, includes:

   - the cumulative difference in interest expense between the ACC's
operating lease method of amortizing the lease obligation for regulatory
purposes and GAAP capital lease amortization (see Deferred Lease Expense in
Note 2); and

   - the balance of Pre-1993 Springerville Coal Handling Facilities Lease
Costs Deferred described in Deferred Lease Expense in Note 2.

  SPRINGERVILLE UNIT 1 ALLOWANCE

     In a 1989 Rate Order, the ACC limited TEP's recovery of non-fuel
expenses of Springerville Unit 1 through retail rates to a rate of $15 per kW
per month based on a 360 MW capacity rating.  These costs averaged
approximately $22 per kW per month during the period 1996 through 1998.  In
1990 and 1992, TEP recorded losses and a Springerville Unit 1 Allowance equal
to the present value of the excess of TEP's estimated costs through 2014 (the
end of the initial term of the lease) over $15 per kW per month using a
discount rate of 13%.

     The balance sheet contra-asset Springerville Unit 1 Allowance (the
present value of the estimated excess costs) changes as follows:

   - Increases each year by the amount of interest expense accrued at 13% on
the contra-asset.  This interest expense is included as part of Interest
Imputed on Losses Recorded at Present Value in the Interest Expense section
in the income statements.  In 1998, 1997 and 1996, the interest expense
accrual related to the Springerville Unit 1 Allowance was $34.2 million,
$32.4 million and $30.3 million, respectively.

   - Decreases by the amount of Amortization of Springerville Unit 1
Allowance which is a contra-expense included in Operating Expenses.  In 1998,
1997 and 1996, the amount amortized was $30.5 million, $28.0 million and
$29.1 million, respectively.

  LONG-TERM DEBT

     We defer all costs related to the issuance of long-term debt.  These
costs include underwriters' commissions, discounts or premiums, and other
costs such as legal, accounting and regulatory fees and printing costs.  We
amortize these costs over the life of the debt.

     When we incur gains and losses on debt that we retire prior to maturity,
we amortize the gains or losses over the remaining original life of the debt.

  UTILITY OPERATING REVENUES

     We record utility operating revenues when we deliver electricity to
customers.  Operating revenues include unbilled revenues which are earned
(service has been provided) but not billed by the end of an accounting
period.  In the third quarter of 1998, TEP changed its method of estimating
unbilled revenues to more accurately reflect sales made but not yet billed.
If we had continued using the previous method of calculating unbilled
revenues, revenues for the three-months and twelve-months ended December 31,
1998 would have been $2.7 million less and $4.4 million greater,
respectively.

  FUEL COSTS

     Fuel inventory, primarily coal, is recorded at weighted average cost.
TEP uses full absorption costing.  Under full absorption costing, all costs
incurred in the production process are included in the cost of the inventory.
Examples of these costs are direct material, direct labor and overhead costs.

     As described in Deferred Lease Expense in Note 2, Pre-1993 Springerville
Coal Handling Facilities Lease Costs Deferred are being amortized to fuel
expense on a straight-line basis through the year 2030 at an average cost of
$1.4 million per year pursuant to the 1994 Rate Order.

  INCOME TAXES

     We are required by GAAP to report some of our assets and liabilities
differently for our financial statements than we do for income tax purposes.
The tax effects of differences in these items are reported as deferred income
tax assets or liabilities in our balance sheets.  We measure these assets and
liabilities using income tax rates that are currently in effect.

     See Note 2 for discussion of the following income tax items:

   - Income Taxes Recoverable Through Future Revenues
   - Deferred Investment Tax Credits Regulatory Liability

     The income tax benefits included in Other Income (Deductions) in the
1997 and 1996 income statements are primarily a result of the recognition of
a portion of the net operating loss carryforwards.  See Note 11.

     We allocate income taxes to the subsidiaries based on their taxable
income and deductions used in the consolidated tax return.

  EMISSION ALLOWANCES

     Emission Allowances are issued by the EPA and each permits emission of
one ton of sulfur dioxide.  These allowances can be sold.  TEP records
Emission Allowance purchases in a noncurrent inventory account included in
Investments and Other Property on the balance sheets.  Emission allowance
inventory is recorded at weighted average cost.  Gains on sales of Emission
Allowances are deferred as Emission Allowance Gain Regulatory Liability in
the balance sheets.  See Emission Allowance Gain Regulatory Liability in Note
2.

  NEW ACCOUNTING STANDARDS

     In June 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 133 (FAS 133), Accounting for
Derivative Instruments and Hedging Activities.  A derivative financial
instrument or other contract derives its value from another investment or
designated benchmark.  This Statement requires all derivative instruments to
be recognized as either assets or liabilities in the balance sheet.  Some
derivative instruments offset, or hedge, exposure to a specific risk.  If the
derivative is not a hedging instrument, measurement is at fair value and
changes in fair value (i.e., gains and losses) are recognized in earnings in
the period of change.  If a derivative qualifies as a hedge, the accounting
for changes in fair value will depend on the specific exposure being hedged.
We are required to adopt FAS 133 in the first quarter of 2000.  We are still
quantifying the effect, if any, that the adoption of FAS 133 will have on our
financial statements.

     In November 1998, the Emerging Issues Task Force issued guidance on
accounting for energy trading activities.  Energy trading activities are
intended to generate profits from changes in the market prices for energy-
related commodities such as electricity, natural gas and coal.  These
activities include certain purchase power and transmission contracts.  This
guidance requires us to measure the difference between cost and market value
for our energy contracts and include any resulting gains or losses in
earnings.  We are required to adopt this guidance in the first quarter of
1999.  We do not expect the adoption of this guidance to have a material
effect on our financial statements.

  RECLASSIFICATIONS

     We have made minor reclassifications to the prior year financial
statements to conform to the current year's presentation.

NOTE 2.  TEP'S REGULATORY ASSETS AND LIABILITIES
- ------------------------------------------------

     As discussed in Note 1, the ACC and, in some areas, the FERC regulate
TEP's utility accounting practices and electricity rates.

  ACCOUNTING FOR THE EFFECTS OF REGULATION

     TEP generally uses the same accounting policies and practices used by
unregulated companies for financial reporting under GAAP.  However, sometimes
these principles, such as FAS 71, require special accounting treatment for
regulated companies to show the effect of regulation.  For example, in
setting TEP's retail rates, the ACC may not allow TEP to currently charge its
customers to recover certain expenses but; instead, require that these
expenses be charged to customers in the future.  In this situation, FAS 71
requires that TEP not show these expenses on its current income statements
but defer these items and show them as regulatory assets on the balance sheet
until TEP is allowed to charge its customers.  TEP then amortizes these items
as expense to the income statement as those charges are recovered from
customers.  Similarly, certain revenue items may be deferred as regulatory
liabilities, which are also eventually amortized to the income statement.

     We have recorded regulatory assets and liabilities in our balance sheets
in accordance with FAS 71.  TEP periodically assesses the recoverability of
costs recognized as regulatory assets and the ability to continue to account
for its activities in accordance with FAS 71 based on each rate action and
the criteria set forth in FAS 71.

     The balance sheets contain certain amounts solely as a result of using
FAS 71:

                                                         December 31,
                 Assets (Liabilities)                  1998         1997
     --------------------------------------------------------------------
                                                  - Millions of Dollars -
     Income Taxes Recoverable Through Future
      Revenues                                        $  152      $  170
     Deferred Springerville Generation Costs             102         118
     Deferred Lease Expense                               10          12
     Other Regulatory Assets                              19          11
     --------------------------------------------------------------------
        Total Regulatory Assets                       $  283      $  311
     ====================================================================
     Deferred Investment Tax Credits
      Regulatory Liability                            $  (10)     $  (12)
     Emission Allowance Gain Regulatory
      Liability                                          (31)        (18)
     --------------------------------------------------------------------
        Total Regulatory Liabilities                  $  (41)     $  (30)
     ====================================================================

     TEP records regulatory assets based on:

   - ACC rate orders that provide a mechanism for recovery in regulated
rates; or
   - historical rate treatment which provides evidence that the amounts will
probably be recovered through future rates.

Our regulated rates include a return on investment for the material
regulatory assets listed in the above table.

     The income statements include the following amounts due to application
of FAS 71:

                                                  Years Ended December  31,
                Income (Expense)                    1998     1997     1996
     ----------------------------------------------------------------------
                                                   - Millions of Dollars -
     Income Taxes Recoverable Through Future
      Revenues - Tax Depreciation Differences
      (Flow Through)                              $   (4)  $    -   $    -
     Amortization of Deferred Springerville
      Generation Costs                               (16)     (15)     (24)
     Amortization of Other Regulatory Assets          (2)      (1)      (1)
     Investment Tax Credit Amortization                5        3        4
     Amortization of MSR Option Gain Regulatory
      Liability                                          -        8       20
     Interest Imputed on Losses (MSR Option Gain
      Regulatory Liability) Recorded at Present
      Value                                            -        -       (2)
     ----------------------------------------------------------------------

     If TEP had not applied FAS 71 in these years, the above amounts would
have been reflected in the income statements in prior periods, except for the
amortization and interest expense related to the MSR Option Gain Regulatory
Liability.  These MSR amounts would not have been recorded.  Capital lease
expense would be recognized at different annual amounts if TEP were to
discontinue the application of FAS 71 although the total would be the same
over the life of the leases.  Lease expense included on our income statements
amounted to $114 million in 1998 and 1997 and $113 million in 1996.  If we
had not applied FAS 71, lease expense would have been $135 million in 1998
and $134 million in 1997 and 1996.  See Deferred Lease Expense below.

     Additionally, if TEP had not applied FAS 71, no amortization or interest
expense relating to the Springerville Unit 1 Allowance (see Note 1) would
have been recorded.  Instead,  we would have reduced the Springerville Unit 1
Capital Lease Asset by the Springerville Unit 1 Allowance.  This reduction to
the Springerville Unit 1 Capital Lease Asset would have reduced subsequent
capital lease depreciation expense.

     See Potential Discontinuation of Application of FAS 71 below.

     INCOME TAXES RECOVERABLE THROUGH FUTURE REVENUES

     A portion of the total deferred income tax liability relates to our
utility business, but has not been reflected in the rates we charge our
customers.  This portion of the liability is recorded as Income Taxes
Recoverable Through Future Revenues, a regulatory asset.  These income taxes
represent the tax effect of temporary differences in depreciation and AFUDC.
We amortize these amounts to income tax expense as the temporary differences
reverse.

     Deferred Springerville Generation Costs

     Deferred Springerville Generation Costs consist of the following:

   - Deferred Springerville Common Facility Costs:  These are lease and
operating costs that TEP incurred for the leased portion of the Springerville
Common Facilities during the period after Springerville Unit 1 was placed in
service and before Springerville Unit 2 was placed in service.  The ACC
ordered deferral of these costs and amortization, as depreciation, over the
initial term of the Springerville Common Facilities Leases.  See Capital
Lease Obligations in Note 7.  This depreciation amounts to approximately $3
million per year.  The unamortized balance at December 31, 1998 and 1997 was
$55.7 million and $58.2 million, respectively.

   - Deferred Springerville Contract Termination Fee:  On June 27, 1997, TEP
signed an agreement with the coal supplier for the Springerville Generating
Station to terminate the then-existing coal supply contract and enter into a
new lower cost contract with the same supplier.  See TEP Commitments - Fuel
Purchase in Note 10.  TEP paid a $50 million termination fee in three
installments:  $30 million in June 1997, $10 million in September 1997, and
$10 million in March 1998.

     Based on an ACC order, TEP recorded a regulatory asset for the
termination fee and is amortizing approximately $4 million per year to Fuel
and Purchased Power expense over the 13-year term of the new agreement.  The
unamortized balance at December 31, 1998 and 1997 was $44.2 million and $48.1
million, respectively.

   - Deferred Springerville Unit 2 Costs:  Prior to the ACC's 1996 Rate
Order, TEP was not recovering 37.5% of the deferred Springerville Unit 2 rate
synchronization costs (non-fuel costs of Springerville Unit 2 incurred from
January 1, 1991 through October 14, 1991) through retail rates.  Beginning
March 31, 1996, these costs are being amortized over a three-year period in
accordance with the 1996 Rate Order.  The amortization of these costs
included in Depreciation and Amortization on the 1998, 1997 and 1996 income
statements amounted to $9 million, $10 million and $21 million, respectively.
The unamortized balance at December 31, 1998 and 1997 was $2.3 million and
$11.6 million, respectively.

     Deferred Lease Expense

     Deferred Lease Expense relates to TEP's capital leases described in TEP
Utility Plant Under Capital Leases in Note 1 and is comprised of the
following:

   - Pre-1993 Springerville Coal Handling Facilities Lease Costs Deferred:
TEP deferred certain lease and interest costs through 1992 based on ACC rate-
making treatment.  The ACC's 1994 Rate Order allowed TEP to recover these
costs on a straight-line basis through 2030.  These costs are being amortized
equally to Fuel and Purchased Power expense and Depreciation and Amortization
expense.

   - Capital vs. Operating Lease Treatment:  Under GAAP, these leases qualify
as capital leases.  However, for ACC rate-making purposes, these leases are
treated as operating leases with recovery as if payments were made in equal
annual amounts.  Because TEP follows FAS 71, Capital Lease Expense on the
income statement reflects the rate-making expense.  However, the Capital
Lease Asset and Obligation on the balance sheet reflect capital lease
accounting used by unregulated companies.  The differences between the ACC's
operating lease method and the GAAP capital lease method are recorded as a
deferred lease asset or liability and include the following:

     - Interest Expense Differences:  These are the differences between
interest expense under the ACC's operating lease method and interest expense
under GAAP capital lease accounting for unregulated companies.

     - Lease Term Differences:  Under GAAP, the initial term of the lease is
normally used for the cost recognition period.  For rate-making purposes, the
ACC uses the initial term of the leases, except for the Springerville Coal
Handling Facilities Leases.  The ACC mandated that the period of recovery for
the Springerville Coal Handling Facilities Leases be the initial term of the
leases plus the first optional renewal period of six years.  As a result of
the ACC mandate and application of FAS 71, we amortize the Springerville Coal
Handling Facilities Lease costs based on the extended period.  We describe
our lease terms in Capital Lease Obligations in Note 7.

     Deferred Investment Tax Credits Regulatory Liability

     ITC reduces federal income taxes.  On our financial statements we have
deferred the benefit relating to ITC claimed on tax returns.  This deferred
benefit is recorded as Deferred Investment Tax Credits Regulatory Liability
on the balance sheets.  As authorized by the ACC, we amortize this regulatory
liability over the tax lives of the related property.  This amortization is
an income tax benefit in the income statement.  See Note 11.

     Emission Allowance Gain Regulatory Liability

     Gains on sales of Emission Allowances are deferred as an Emission
Allowance Gain Regulatory Liability in the balance sheets and will be
amortized as income in 2000 - 2024, the period TEP expects to use the
Emission Allowance inventory to meet EPA regulations.  The deferral for
future amortization reflects the expected regulatory treatment of the gains.
We describe the environmental regulations that apply to TEP in Commitments -
Environmental Regulation in Note 10.

     MSR Option Gain Regulatory Liability

     In a 1989 Rate Order the ACC allocated to retail customers part of TEP's
1982 gain from the sale of an option to purchase a 28.8% interest in San Juan
Unit 4.  The ACC ordered TEP to recognize the MSR Option Gain by amortizing
amounts to operating revenue through May 1997.  Therefore, in 1990, TEP
recorded a loss and the MSR Option Gain Regulatory Liability, equal to the
present value of the amounts to be amortized through May 1997, calculated
using a 13% discount rate.  In 1997 and 1996, the amounts amortized to
operating revenues were $8.1 million and $20.1 million, respectively.

     Retail Excess Capacity Deferrals

     SEE DISCUSSION OF THIS OFF-BALANCE SHEET REGULATORY ASSET IN RATE
REDUCTION IN NOTE 3.

  POTENTIAL DISCONTINUATON OF APPLICATION OF FAS 71

     A regulated company must satisfy certain conditions to apply the
accounting policies and practices of FAS 71.  These conditions include:

   - an independent regulator sets rates;
   - the regulator sets the rates to cover specific costs of delivering
service; and
   - the service territory lacks competitive pressures to reduce rates below
the rates set by the regulator.

     We periodically assess whether we continue to meet these conditions.  If
we were required to stop applying FAS 71 to all or a portion of TEP's
regulated utility operations, we would write off the related balances of
TEP's regulatory assets and liabilities as a charge in our income statement.
In that event, our earnings would be reduced by the amount of regulatory
assets, net of regulatory liabilities, after applicable deferred income
taxes.  Based on the balances of TEP's regulatory assets and liabilities at
December 31, 1998, if we had ceased applying FAS 71 to all of TEP's regulated
operations, we would have recorded an extraordinary loss of approximately
$145 million, net of the related income tax benefit of $97 million.  However,
we would not write-off the regulatory assets, net of regulatory liabilities,
if we are authorized to recover these amounts through the remaining regulated
portion of our business.  See Recovery of Stranded Costs below.
Approximately 62% of TEP's net regulatory assets on the balance sheet relate
to electric generation.  While regulatory orders and market conditions may
affect our cash flows, our cash flows would not be affected if we stopped
applying FAS 71.

     If we stop applying FAS 71, we would need to evaluate the likelihood
that we could recover the cost of TEP's electric plant in the marketplace.
If undiscounted cash flows are less than the carrying value of plant assets
that we continue to own, then we would need to write off as an expense a
portion of those plant assets to reflect their current market value.  Plant
assets to be disposed of would be written down to fair value if it is less
than carrying value.  We cannot predict if we would write off any plant
assets as a result of these evaluations.

     Events That May Impact TEP's Application of FAS 71 - Retail Electric
Competition

     In December 1996, the ACC adopted retail electric competition rules
(Rules) to introduce retail electric competition in Arizona.  As initially
adopted, the rules required each "Affected Utility" (TEP, Arizona Public
Service Company, Citizens Utilities Company and several cooperatives) to open
its retail service area to competing electric service providers over the
period 1999 to 2003.  On August 5, 1998, the ACC adopted amendments to these
Rules which, in part, provide a two-year phase-in schedule in which all
retail customers will have access to competitive generation by January 1,
2001.  Subsequently, the ACC delayed implementation of the Rules - see below.

     On June 22, 1998, the ACC adopted an order requiring Arizona utilities
to choose from one of two options for recovery of stranded costs resulting
from the implementation of retail electric competition by August 21, 1998.
Stranded costs represent costs recoverable by a utility in a regulated market
that would not likely be recovered through the prices charged for electricity
and other services in a competitive market.  The two options were:

  (1)Divestiture/Auction Methodology
     - This method would require the sale of all electric generation assets
through auction by January 1, 2001;
     - Stranded costs would be calculated as the difference between book
value of generation assets (including related regulatory assets) and the
proceeds of the sale;
     - 100% of stranded costs, including a return on the unamortized balance,
would be recovered over a ten-year period; and
     - All customers of Affected Utilities would pay for the stranded costs.

  (2)Transition Revenues Methodology
     - The ACC would determine the revenues necessary to maintain financial
integrity (such as avoiding default under currently existing financial
instruments); and
     - Affected Utilities would recover the determined amount of stranded
costs over a period of ten years.

     The June 1998 order encouraged, but did not require, full divestiture of
generating assets through an auction to unaffiliated third parties.  The
order stated that only those Affected Utilities choosing divestiture through
the Divestiture/Auction Methodology would have the opportunity to recover
100% of unmitigated stranded costs.  The order also specified that some form
of rate cap would be in place for Standard Offer Electric Service customers
during the transition period.  Standard Offer Electric Service customers are
those who do not have, or do not choose, access to competing electric service
providers during the phase-in of retail electric competition.

     On August 21, 1998, as required by the June 1998 order, TEP filed a
proposed plan for divestiture of generating assets and stranded cost recovery
with the ACC.  Under the plan, TEP proposed to divest all of its generating
assets and associated property as a method of recovering stranded costs.  In
its filing with the ACC, TEP estimated its stranded costs may range from $600
million to $1.1 billion.

     ACC Staff Stranded Cost Recovery Agreement

     On November 4, 1998, TEP reached a settlement agreement with the ACC
Staff related to TEP's plan to divest generation assets and for 100% recovery
of stranded costs.  The agreement also supported an exchange of TEP's
interests in the Navajo and Four Corners Generating Stations for certain high
voltage transmission assets owned by APS.  Because the ACC did not approve
the SCR Agreement by November 25, 1998, the agreement is considered withdrawn
by TEP and the ACC Staff.

     ACC Delays Retail Electric Competition Rules

     In December 1998, the ACC approved implementation of the Rules on
January 1, 1999.  The Rules were substantially the same as those adopted in
December 1996 and amended on August 5, 1998.  However, the ACC increased the
percentage of residential customers eligible to choose alternative energy
suppliers on January 1, 1999 from 1/2 of 1% to 1 1/2, with an additional 1 1/4%
eligible each quarter until January 1, 2001.  This meant that 3,750 of TEP's
residential customers would have been eligible to choose a competing electric
service provider on January 1, 1999 and an additional 3,750 customers each
subsequent quarter.

     On January 5, 1999, the ACC delayed implementation of the Rules.  The
ACC did not set a date that the Rules will become effective.  The ACC Hearing
Officer issued a Proposed Order on February 5, 1999 and amended it on March
12, 1999.  If adopted by the ACC, the Proposed Order would modify the June
1998 order so that divestiture is not required for 100% stranded cost
recovery.  The Proposed Order allows for alternative methodologies for
determining stranded costs so long as the plans are found to be in the best
interest of all stakeholders.  Under the Proposed Order, Affected Utilities
will have an opportunity to amend their previously filed stranded cost
recovery plans.  TEP's original stranded cost recovery plan, filed on August
21, 1998, specified divestiture of generation assets as the preferred method
for recovery given the then available options.  TEP filed exceptions to the
Proposed Order on February 17, 1999.  No meeting date has been set to
consider the Proposed Order.  If the Proposed Order is approved, TEP may
amend its stranded cost recovery proposal.  We cannot predict the outcome of
the numerous unresolved issues, including quantification and recovery of
stranded costs, whether the Rules will be changed, or the date the Rules will
become effective.

     Recovery of Stranded Costs

     We expect that TEP will stop accounting for its generation operations
using FAS 71 when the ACC approves a cost recovery plan specific to TEP which
includes the amount of stranded costs (including regulatory assets, net of
regulatory liabilities) that TEP can recover and a cost recovery method.
Until the ACC approves the amount and recovery method, we are unable to
predict the amount of write-offs, if any, or other changes in asset and
liability values which would be recorded at that time.

     TEP intends to continue to seek 100% recovery of stranded costs.  While
there can be no assurance as to the specific form of any stranded cost
recovery plan, the June 22, 1998 ACC order permitting recovery of 100% of
stranded costs upon divestiture of generating assets currently remains in
effect.

     OTHER ACTIONS REGARDING COMPETITION

     In May 1998 the Arizona State Legislature approved and the Governor
signed a bill regarding retail electric competition.  The legislation
requires the introduction of customer choice to 20% of each public power
entity's retail load by December 31, 1998 with 100% customer choice by
December 31, 2000.  This legislation only applies to public power entities
such as SRP.  However, the bill encourages broader application of the
legislation's principles by the ACC to the state's investor-owned utilities,
including TEP, and cooperatives.

     We cannot predict the outcome of the legislation or the ACC's Rules.
Additionally, federal legislators introduced several retail competition
initiatives in Congress which, if passed, could modify or override the
actions taken by the ACC or the Arizona Legislature.

NOTE 3.  RATE MATTERS
- ---------------------

  RATE REDUCTION

     On August 25, 1998, the ACC approved a rate settlement agreement (Rate
Settlement) which provides TEP's retail customers with the following base
price decreases:

   - an initial 1.1% decrease (approximately $7.0 million) effective July 1,
1998,
   - a second decrease of 1.0% (approximately $5.5 million) on July 1, 1999,
and
   - an additional 1.0% decrease (approximately $5.5 million) on July 1,
2000.

     The latter two decreases will apply to all tariffed retail customers
prior to the start of competition and to all Standard Offer Electric Service
customers.  See discussion regarding the delay in the ACC's retail electric
competition rules in Note 2.

     The Rate Settlement also mitigates certain potentially stranded costs by
accelerating the recovery of the Retail Excess Capacity Deferrals.  Beginning
December 31, 1996, the amortization period for the Retail Excess Capacity
Deferrals decreased from 20 years to 7.8 years.  Retail Excess Capacity
Deferrals represent operating and capital costs associated with Springerville
Unit 2 capacity which the ACC did not allow us to recover in rates until 1994
and 1996.  These Retail Excess Capacity Deferrals totaled $69.5 million and
$81.6 million at December 31, 1998 and 1997, respectively.  These deferrals
are reflected only in our regulatory calculations.  The accompanying balance
sheets do not include these deferrals as the costs were expensed when
incurred for financial reporting purposes.  The $4.3 million (after-tax)
increase in annual amortization expense from the decreased amortization
period is reflected in TEP's regulatory accounting records, not presented
here, and does not have an impact on the expenses included in our financial
statements.

  1996 RATE ORDER

     On March 29, 1996, the ACC authorized a 1.1%, or $6.4 million, increase
in TEP's base rates effective March 31, 1996.  Under the 1996 Rate Order, TEP
cannot seek a base rate increase before January 1, 2000, subject to specific
exceptions.

NOTE 4.  SEGMENT AND RELATED INFORMATION
- ----------------------------------------

     In 1998, we adopted Statement of Financial Accounting Standards No.131
(FAS 131), Disclosures about Segments of an Enterprise and Related
Information, which requires that we report financial and descriptive
information about our operating segments.  These segments are determined
based on the way we organize our operations and evaluate performance.
UniSource Energy's principal business segment is TEP, a regulated electric
utility.  The other reportable business segment is Millennium which holds the
following unregulated energy businesses:

   - Advanced Energy Technologies, Inc. (Advanced Energy) which owns 50
percent of Global Solar Energy, L.L.C., a developer and manufacturer of
photovoltaic materials;
   - MEH Corporation (MEH) which holds a 50 percent interest in New Energy
Ventures, Inc. (NEV), an energy buyer representative; and
   - Nations Energy Corporation (Nations) which is an independent power
developer.

     As discussed in Note 1, we record our percentage share of the earnings
of affiliated companies when we hold a 20% to 50% voting interest.  Our
portion of the net income (loss) of the entities held by our unregulated
energy businesses is shown below in Net Income (Loss) from Equity Method
Entities.

     See Note 5 for more information on our unregulated energy businesses.
Intersegment revenues are not material.  The accounting policies of the
segments are described in Note 1.  We disclose selected financial data for
our business segments in the following tables:

                                    Segments
                            -----------------------
                               TEP:      Millennium:
                            Regulated   Unregulated               UniSource
                             Electric     Energy     Reconciling    Energy
1998                         Utility     Businesses  Adjustments Consolidated
- -----------------------------------------------------------------------------
                                       - Thousands of Dollars  -
Income Statement
- ----------------
  Operating Revenues        $ 768,990    $   1,927    $  (2,241)   $ 768,676
- -----------------------------------------------------------------------------
  Net Income (Loss) from
   Equity Method Entities*:
    Advanced Energy's
     Joint Ventures                           (376)                     (376)
    MEH's Joint Ventures                   (16,041)                  (16,041)
    Nations' Joint Ventures                  2,758                     2,758
    Other Entities'
      Joint Ventures                           (44)                      (44)
                                           --------                  -------
       Total                        -      (13,703)           -      (13,703)
- -----------------------------------------------------------------------------
   Interest Income             10,800        2,671       (2,605)      10,866
- -----------------------------------------------------------------------------
   Interest Expense           117,600           14          (14)     117,600
- -----------------------------------------------------------------------------
   Depreciation and
    Amortization               90,358           89          (89)      90,358
- -----------------------------------------------------------------------------
   Income Tax (Benefit)
    Expense                    17,578       (3,761)          18       13,835
- -----------------------------------------------------------------------------
   Net Income (Loss):
    Advanced Energy                           (261)
    MEH                                     (9,192)
    Nations                                  1,396
    Other Entities                             (52)
                                             ------
       Total Net Income (Loss) 41,676       (8,109)      (5,535)      28,032
- -----------------------------------------------------------------------------










Cash Flow Statement
- -------------------
  Net Cash Flows from
   Operating Activities       181,858      (17,916)      (1,197)     162,745
- -----------------------------------------------------------------------------
   Capital Expenditures       (81,011)        (137)           -      (81,148)
- -----------------------------------------------------------------------------
   Investments in and Loans
    to Unregulated Energy
     Businesses:
     Advanced Energy                        (2,050)                   (2,050)
     MEH                                   (33,000)                  (33,000)
     Nations                               (15,617)                  (15,617)
     Other Entities                            (15)                      (15)
                                           --------                  -------
        Total                       -      (50,682)           -      (50,682)
- -----------------------------------------------------------------------------
   Distributions from
    Unregulated Energy
     Businesses:
     Nations                        -       20,750            -       20,750
- -----------------------------------------------------------------------------
Balance Sheet
- -------------
  Total Assets              2,628,583       74,144      (68,547)   2,634,180
- -----------------------------------------------------------------------------
  Millennium's Equity
   Method Investment in
   Unregulated Energy
   Businesses:
    Advanced Energy                          6,622       (6,622)
    MEH                                     24,092      (24,092)
    Nations                                 42,539      (42,539)
    Other Entities                           1,118       (1,118)
                                            -------     --------
      Total                         -       74,371      (74,371)           -
- -----------------------------------------------------------------------------






















                                   Segments
                            -----------------------
                              TEP:      Millennium:
                           Regulated   Unregulated                 UniSource
                            Electric     Energy      Reconciling    Energy
1997                        Utility     Businesses   Adjustments Consolidated
- -----------------------------------------------------------------------------
                                       - Thousands of Dollars  -
Income Statement
- ----------------
  Operating Revenues        $ 729,893    $     682    $    (682)  $ 729,893
- -----------------------------------------------------------------------------
  Net Income (Loss) from
   Equity Method Entities*:
    Advanced Energy's
     Joint Ventures                           (231)                    (231)
    MEH's Joint Ventures                    (7,759)                  (7,759)
    Nations' Joint Ventures                  3,545                    3,545
    Other Entities'
     Joint Ventures                            (11)                     (11)
                                           --------                 --------
       Total                        -       (4,456)           -      (4,456)
- -----------------------------------------------------------------------------
   Interest Income             11,239          506         (506)     11,239
- -----------------------------------------------------------------------------
   Interest Expense           106,875           47          (47)    106,875
- -----------------------------------------------------------------------------
   Depreciation and
    Amortization               86,405           43          (43)     86,405
- -----------------------------------------------------------------------------
   Income Tax (Benefit)
    Expense                   (19,266)      (2,838)       2,838     (19,266)
- -----------------------------------------------------------------------------
   Net Income (Loss):
    Advanced Energy                           (583)
    MEH                                     (4,567)
    Nations                                    194
    Other Entities                            (388)
                                             ------
       Total                   88,916       (5,344)           -      83,572
- -----------------------------------------------------------------------------


















Cash Flow Statement
- -------------------
  Net Cash Flows from
   Operating Activities       128,488       (2,205)           -      126,283
- -----------------------------------------------------------------------------
   Capital Expenditures       (72,391)         (84)           -      (72,475)
- -----------------------------------------------------------------------------
   Investments in and Loans to
    Unregulated Energy Businesses:
     MEH                                    (4,800)                   (4,800)
     Nations                                (2,117)                   (2,117)
     Other Entities                           (200)                     (200)
                                           --------                  --------
        Total                       -       (7,117)           -       (7,117)
- -----------------------------------------------------------------------------
   Distributions from
    Unregulated Energy
     Businesses:
     Nations                        -        2,119            -        2,119
- -----------------------------------------------------------------------------
Balance Sheet
- -------------
  Total Assets              2,656,767       68,644      (91,002)   2,634,409
- -----------------------------------------------------------------------------
  Millennium's Equity
   Method Investment in
   Unregulated Energy
   Businesses:
    Advanced Energy                          4,783       (4,783)
    MEH                                      4,284       (4,284)
    Nations                                 41,155      (41,155)
    Other Entities                           1,388       (1,388)
                                            -------     --------
      Total                         -       51,610      (51,610)           -
- -----------------------------------------------------------------------------
























                                  Segments
                            -----------------------
                               TEP:     Millennium:
                            Regulated  Unregulated               UniSource
                             Electric    Energy      Reconciling   Energy
1996                         Utility    Businesses   Adjustments Consolidated
- -----------------------------------------------------------------------------
                                       - Thousands of Dollars  -
Income Statement
- ----------------
  Operating Revenues        $ 715,873    $     280    $    (280)  $ 715,873
- -----------------------------------------------------------------------------
  Net Income (Loss) from
   Equity Method Entities*:
    Nations' Joint Ventures         -        2,225            -       2,225
- -----------------------------------------------------------------------------
   Interest Income              6,460          192         (192)      6,460
- -----------------------------------------------------------------------------
   Interest Expense           102,862           14          (14)    102,862
- -----------------------------------------------------------------------------
   Depreciation and
    Amortization               98,246            -            -      98,246
- -----------------------------------------------------------------------------
   Income Tax (Benefit)
    Expense                   (82,221)          66          (66)    (82,221)
- -----------------------------------------------------------------------------
   Net Income (Loss):
    Advanced Energy                            (89)
    Nations                                 (2,095)
    Other Entities                            (100)
                                             ------
       Total                  123,136       (2,284)           -     120,852
- -----------------------------------------------------------------------------
Cash Flow Statement
- -------------------
  Net Cash Flows from
   Operating Activities       151,724        1,208            -     152,932
- -----------------------------------------------------------------------------
   Capital Expenditures       (68,184)         (88)           -     (68,272)
- -----------------------------------------------------------------------------
   Investments in and Loans to
    Unregulated Energy Businesses:
     Advanced Energy                        (5,000)                  (5,000)
     Nations                                (4,173)                  (4,173)
                                           --------                 --------
        Total                       -       (9,173)           -      (9,173)
- -----------------------------------------------------------------------------
* The Net Income (Loss) from Equity Method Entities is included in
Unregulated Energy Businesses - Net in UniSource Energy's income statements.

     Prior to 1998, the unregulated businesses now held by Millennium were
held by and consolidated with TEP.

     The reconciling adjustments in 1998, 1997 and 1996 include the
following:

   - Elimination of the revenues and expenses of Millennium's unregulated
energy businesses to show this activity in Unregulated Energy Businesses -
Net in the Other Income (Deductions) section of UniSource Energy's income
statements, and
   - Elimination of intercompany activity and balances.

NOTE 5.  UNREGULATED ENERGY BUSINESSES
- --------------------------------------

     On January 1, 1998, TEP transferred the stock of its subsidiary,
Millennium Energy Holdings, Inc. (formerly MEH Corporation), to UniSource
Energy.  See Basis of Presentation in Note 1.  Millennium now owns 100% of
the stock of the entities described below which were established to pursue
various unregulated energy-related investment opportunities.  See Note 4.

  INTERNATIONAL POWER PROJECTS  - NATIONS ENERGY CORPORATION

     Nations and its subsidiaries develop independent power projects in
domestic and foreign energy markets.  Nations owns 100% of the stock of the
following entities:

   - Nations Energy Holland Holding (Nations Holland) - In October 1998,
Nations Holland paid $8.1 million for a minority equity interest in a power
project located in the Czech Republic.  The 340 MW project is scheduled for
completion in late-1999.  The existing assets and, once completed, the
generating facility produces power and steam which are sold to a regional
distribution company and an adjacent industrial complex.  As of December 31,
1998, Nations Holland's total investment in this project was $15.8 million.

   - Nations-Colorado Energy Corporation (Nations-Colorado) - In September
1998, Nations-Colorado sold a 48% interest in Trigen-Nations Energy, which
owns and operates the 40 MW Coors Brewing Company power plant in Golden,
Colorado.  The $5.8 million after-tax gain on the sale is included in
Unregulated Energy Businesses - Net in UniSource Energy's income statements.
Following the sale, Nations Energy owns a 1% percent interest in Trigen-
Nations Energy.

   - Nations International Ltd. (Nations International) - In September 1998,
Nations International purchased a minority interest in Corporation Panamena
de Energia, S.A. (COPESA) for $7.5 million.  COPESA is an independent power
producer which owns and operates a 43 MW power plant near Panama City.  The
energy is sold under an agreement with an unrelated party.

  ENERGY MARKETING - MEH CORPORATION

     Effective September 1, 1997, MEH (formerly Millennium) acquired a 50%
ownership in NEV and made a $0.8 million capital contribution.

     Loans and Guarantees for NEV

     In December 1997, MEH committed to provide NEV with $20 million of
funding.  At December 31, 1998, NEV had received $19 million in debt funding
under the commitment, resulting in a remaining commitment amount available of
$1 million at January 31, 1999.  Additionally, in September 1998, NEV issued
a $4.8 million promissory note to MEH for a $3 million loan MEH extended to
NEV in September 1997 as well as a preferred operating return due MEH under
the terms of NEV's original operating agreement.

     In December 1998, UniSource Energy committed $30 million in credit to
NEV.  NEV has drawn $15 million on the credit commitment at December 31,
1998.  Under the terms of the commitment, NEV must provide collateral prior
to any amounts being drawn under this credit commitment.

     Additionally, in August 1998 UniSource Energy guaranteed a $10 million
loan that NEV obtained from an unrelated party.  That loan is due in 1999.
UniSource Energy is the guarantor of $33.1 million of performance bonds and
other guarantees that secure amounts NEV may owe to utility distribution
companies and energy suppliers in connection with NEV's sales to retail
electric customers.  NEV bills its customers for these charges.  UniSource
Energy's guarantees are secured by various NEV accounts receivable and other
assets.

     NEV Losses

     NEV incurred a total loss of $47 million for the period September 1997
through December 1998.

     In 1998 and 1997, MEH recorded $16 million and $7.8 million,
respectively, of NEV's losses.  These losses, totaling $23.8 million, equal
the total funds and unsecured commitments provided by MEH and UniSource
Energy to NEV.  Our accounting policy limits the amount of NEV's loss to be
recorded by MEH to the total amount invested and committed by MEH and
UniSource Energy on an unsecured basis.  Should MEH or UniSource Energy
provide additional unsecured funding to NEV or should the value of existing
collateral decline, the unsecured amounts provided would be immediately
expensed up to the lesser of the amount of unsecured funding provided or the
amount of NEV's cumulative losses in excess of the $23.8 million already
recorded by MEH.  While we do not currently have plans to extend additional
unsecured amounts, there can be no assurance that additional funding will not
be necessary.

     NEV Summarized Financial Information


                                                     December 31,
     Balance Sheet                                1998          1997
     ------------------------------------------------------------------
                                               - Millions of Dollars -
       Current Assets                              $ 115          $  9
       Noncurrent Assets                               6             2
     ------------------------------------------------------------------
         Total Assets                              $ 121          $ 11
     ==================================================================

       Current Liabilities                         $  90          $  8
       Noncurrent Liabilities                         67            10
       Minority Interest (of which $4 million
         is Mandatorily Redeemable)                    9             -
       Shareholders' Deficit                         (45)           (7)
     ------------------------------------------------------------------
         Total Liabilities and Deficit             $ 121          $ 11
     ==================================================================







                                               Years Ended December 31,
     Income Statement                             1998          1997
     ------------------------------------------------------------------
                                               - Millions of Dollars -
       Retail Customer Revenue                     $ 206          $  2
       Utility Distribution Company Payments        (102)            -
       Cost of Goods Sold                           (119)           (2)
                                                   ------         -----
       Loss from Operations                          (15)            -
         Net Loss                                    (40)          (14)
     ------------------------------------------------------------------

     NEV Technologies

     NEV Technologies, a subsidiary of NEV, together with its two joint
ventures hold exclusive distribution rights for the AlliedSignal
TurboGeneratorTM in the western U.S. and certain international markets.  NEV
Technologies and Dames and Moore Ventures each own 50% of the two joint
ventures.  In October 1998, The Mission Group, an affiliate of Edison
International, made a $10 million minority interest equity investment in NEV
Technologies.

  PHOTOVOLTAIC MANUFACTURING - ADVANCED ENERGY TECHNOLOGIES, INC.

     AET owns 50% of Global Solar Energy, L.L.C. which develops and
manufactures photovoltaic materials.

NOTE 6.  TEP'S UTILITY PLANT AND JOINTLY-OWNED FACILITIES
- ---------------------------------------------------------

  UTILITY PLANT

     The following table shows TEP's Utility Plant in Service by major class:

                                                       December 31,
                                                    1998          1997
- -------------------------------------------------------------------------
                                                 - Thousands of Dollars -
Plant in Service:
 Production Plant                                $1,069,079    $1,045,423
 Transmission Plant                                 477,016       471,230
 Distribution Plant                                 586,150       562,336
 General Plant                                      110,899       104,344
 Intangible Plant                                    20,013         9,175
 Electric Plant Held for Future Use                     714         1,642
- -------------------------------------------------------------------------
  Total Plant in Service                         $2,263,871    $2,194,150
=========================================================================

     See TEP Utility Plant in Note 1.

  JOINTLY-OWNED FACILITIES

     At December 31, 1998, TEP's interests in generating stations and
transmission systems that are jointly-owned with other utilities are as
follows:



                               Percent     Plant  Construction
                              Owned By      in      Work in    Accumulated
                                 TEP      Service*  Progress   Depreciation
- ---------------------------------------------------------------------------
                                             - Thousands of Dollars -

 San Juan Units 1 and 2          50.0     $296,837    $ 8,170     $226,162
 Navajo Station Units 1,2 and 3   7.5      114,022      7,563       49,727
 Four Corners Units 4 and 5       7.0       78,882          2       60,311
 Transmission Facilities      7.5 to 95.0  218,284      1,240      122,199
- ---------------------------------------------------------------------------
     Total                                $708,025    $16,975     $458,399
===========================================================================

*Included in Utility Plant shown above.

     TEP has financed or provided funds for the above facilities and TEP's
share of their operating expenses is included in the income statements.

NOTE 7.  TEP'S LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS
- -----------------------------------------------------------

  LONG-TERM DEBT

     LONG-TERM DEBT MATURES MORE THAN ONE YEAR FROM THE DATE OF THE FINANCIAL
STATEMENTS.  WE SUMMARIZE OUR LONG-TERM DEBT IN THE STATEMENTS OF
CAPITALIZATION.

     SALE AND REDEMPTION OF BONDS - 1998

     During 1998, TEP issued $386.9 million in new bonds and redeemed $416.4
million of previously outstanding bonds.  TEP achieved the following
objectives with this refinancing activity:

   - extended maturities,
   - replaced variable rate debt with fixed rate debt, and
   - eliminated restrictive covenants contained in existing First Mortgage
Bonds.

     Bonds issued in 1998 include:

                            Amount    Rate    Maturity  Security
- ----------------------------------------------------------------------------
                    - Millions of Dollars -
1998 Apache A IDBs         $  83.7    5.85%     2028    Unsecured
1998 Apache B IDBs            99.8   5.875%     2033    Unsecured
1998 Apache C IDBs            16.5    5.85%     2026    Unsecured
12.22% Exchange Series
 First Mortgage Bonds         46.9   12.22%     2000    First Mortgage
7.50% First Collateral
 Trust Bonds                 140.0    7.50%     2008    First Mortgage Bonds
- ----------------------------------------------------------------------------
    Total                   $386.9
============================================================================

     TEP exchanged $46.9 million of its existing 12.22% First Mortgage Bonds
due 2000 for the same amount of new 12.22% Exchange Series First Mortgage
Bonds due 2000.  With the exception of the covenants restricting the payment
of dividends, the new bonds have substantially the same terms and conditions
as the prior bonds.

     Bonds redeemed in 1998 include:

                            Amount     Rate   Maturity  Security
- ----------------------------------------------------------------------------
                    - Millions of Dollars -
1981 Apache A IDBs         $ 100.0   Variable   2020    Second Mortgage Bonds
1981 Apache B IDBs           100.0   Variable   2021    First Mortgage Bonds
First Mortgage Bonds          15.0    8.50%     1999    First Mortgage
First Mortgage Bonds          25.0   8.125%     2001    First Mortgage
First Mortgage Bonds          40.0    7.65%     2003    First Mortgage
First Mortgage Bonds          25.0    7.55%     2002    First Mortgage
First Mortgage Bonds*         78.8   12.22%     2000    First Mortgage
First Mortgage Bonds          32.1    8.50%     2009    First Mortgage
1976 Farmington(sinking fund)  0.5    7.50%     2006    First Mortgage Bonds
- ----------------------------------------------------------------------------
    Total                   $416.4
============================================================================

* $31.9 million were redeemed and $46.9 million were exchanged for the newly
issued 12.22% Exchange Series First Mortgage Bonds.

     When TEP redeemed all of its First Mortgage Bonds due in 1999, 2001,
2002, and 2003, as well as the $31.9 million of 12.22% First Mortgage Bonds
due 2000 not tendered for exchange as described above, it eliminated
covenants that restricted the payment of common stock dividends.

     Sale and Redemption of Bonds - 1997

     During 1997, TEP issued $379.3 million in new bonds and redeemed $356.8
million of previously outstanding bonds.

     Bonds issued in 1997 include:

                                 Amount     Rate   Maturity  Security
     ------------------------------------------------------------------
                         - Millions of Dollars -
     1997 Farmington A          $  80.4    6.95%     2020    Unsecured
     1997 Coconino A**             36.7   7.125%     2032    Unsecured
     1997 Coconino B               14.7    7.00%     2032    Unsecured
     1997 Pima A***                22.5    6.10%     2025    Unsecured
     1997 Pima B                  150.0    6.00%     2029    Unsecured
     1997 Pima C                   75.0    6.00%     2029    Unsecured
     ------------------------------------------------------------------
         Total                   $379.3
     ==================================================================

** $20 million of the proceeds from this issuance are being used to fund
additional pollution abatement facilities at Navajo Generating Station.

***$2.5 million of the proceeds from this issuance were used to finance
improvements to TEP's lower voltage electric transmission and distribution
system in Pima County, Arizona.

     Bonds redeemed in 1997 include:

                            Amount     Rate   Maturity  Security
- ----------------------------------------------------------------------------
                    - Millions of Dollars -
1996 Coconino Series
 A IDBs                    $  16.7   Variable   2031    First Mortgage Bonds
1996 Coconino Series
 B IDBs                       14.7   Variable   2031    First Mortgage Bonds
1973 Farmington A IDBs        47.9    6.25%     2003    Unsecured
1977 Farmington A IDBs        32.5    6.10%     2007    First Mortgage Bonds
1982 Monthly Pima A General
 IDBs                         75.0   Variable   2022    Credit Agreement****
1982 Quarterly Pima A General
 IDBs                         75.0   Variable   2022    Credit Agreement****
1983 Pima A General IDBs      75.0   Variable   2018    Credit Agreement****
1990 Pima A                   20.0   Variable   2025    First Mortgage Bonds
- ----------------------------------------------------------------------------
    Total                   $356.8
============================================================================

****Letters of credit under the Master Restructuring Agreement secured these
IDBs.  The Master Restructuring Agreement was terminated in December 1997
upon origination of TEP's new bank Credit Agreement.

     The proceeds from the issuance of certain bonds were held by a trustee
and subsequently used, by the trustee, to redeem previously outstanding
bonds.  See Note 15 for a description of the non-cash financing activities
related to the sale and redemption of bonds for 1998 and 1997.

     OTHER LONG-TERM DEBT AND AGREEMENTS

     FIRST AND SECOND MORTGAGE

     TEP's General First Mortgage and General Second Mortgage are secured by
a lien on TEP's utility plant, with the exception of Springerville Unit 2.
San Carlos, a subsidiary of TEP, holds title to Springerville Unit 2.

  BANK CREDIT AGREEMENT

     TEP has a $441 million Credit Agreement which provides a $100 million
Revolving Credit Facility and a $341 million Letter of Credit Facility.
These credit facilities mature on December 30, 2002 and are secured by $441
million of Second Mortgage Bonds.  The Credit Agreement initially totaled
$544 million, but was reduced by $103 million in 1998 due to the redemption
of $100 million of bonds supported by a letter of credit under the Credit
Agreement.  The Credit Agreement contains certain financial covenants,
including cash coverage, leverage and net worth tests.  As of December 31,
1998, TEP was in compliance with these covenants.

     The Revolving Credit Facility can be used for general corporate
purposes.  At December 31, 1998, TEP had no outstanding borrowings under this
facility.  If we were to borrow under the Revolving Credit Facility, the
variable interest rate that we would pay would be dependent, in part, on the
credit rating on TEP's senior secured debt.  We pay an annual commitment fee
on the unused portion of the Revolving Credit Facility.  This fee is also
dependent on TEP's credit ratings.  At December 31, 1998, the commitment fee
equaled 0.38% per year.

     The $341 million Letter of Credit Facility secures the payment of
principal and interest on $328.6 million of tax-exempt variable rate bonds
(IDBs).  The amount of commitment fee on the Letter of Credit Facility
depends on TEP's credit ratings.  At December 31, 1998, the commitment fee
equaled 1.50% per year.

  CAPITAL LEASE OBLIGATIONS

     The terms of TEP's capital leases are as follows:

   - The Irvington Lease has an initial term to January 2011 and provides for
renewal periods of two or more years through 2020.
   - The Springerville Common Facilities Leases have an initial term to 2017
for one lease and 2021 for the other two leases, subject to optional renewal
periods of two or more years through 2025.
   - The Springerville Unit 1 Leases have an initial term to January 2015 and
provide for renewal periods of three or more years through 2030.
   - The Springerville Coal Handling Facilities Leases have an initial term
to April 2015 and provide for one renewal period of six years, then
additional renewal periods of five or more years through 2035.

  MATURITIES AND SINKING FUND REQUIREMENTS

     Our long-term debt, including sinking funds, and lease obligations
mature on the following dates:

                          Expiring  Scheduled
                            LOCs    Long-Term
                         Supporting   Debt    Capital Lease
                            IDBs   Retirements Obligations     Total
    -------------------------------------------------------------------
    Years Ending
    December 31,                   - Thousands of Dollars -
        1999                        $  1,725   $  103,277   $  105,002
        2000                          48,603      129,680      178,283
        2001                           1,725      101,781      103,506
        2002              $328,600     1,725       89,301      419,626
        2003                     -     1,725      120,474      122,199
    -------------------------------------------------------------------
        Total 1999 - 2003  328,600    55,503      544,513      928,616
        Thereafter               -   802,045    1,472,668    2,274,713
        Less: Imputed
          Interest               -         -   (1,115,991)  (1,115,991)
    -------------------------------------------------------------------
        Total             $328,600  $857,548   $  901,190   $2,087,338
    ===================================================================

     In addition to the capital lease obligations above, we must ensure $70
million of secured notes underlying the Springerville Common Facilities
leases are refinanced by December 31, 1999 to avoid a special event of loss
under the lease.  This special event of loss would require us to repurchase
the Springerville Common Facilities at the higher of a specified price or the
fair market value of the facilities.  TEP has the intent and the ability to
cause the underlying debt on these leases to be refinanced in 1999.

NOTE 8.  FAIR VALUE OF TEP'S FINANCIAL INSTRUMENTS
- --------------------------------------------------

     The carrying value and fair value of TEP's financial instruments are as
follows:

                                                December 31,
                                         1998                  1997
     -----------------------------------------------------------------------
                                 Carrying     Fair     Carrying     Fair
                                  Value       Value     Value       Value
     -----------------------------------------------------------------------
                                           - Thousands of Dollars -
     Assets:
       Debt Securities (Included
        in Investments and Other
        Property)                 $ 17,813   $ 22,091   $ 17,781   $ 19,911
     Liabilities:
       First Mortgage Bonds:
         Corporate                  74,778     79,359    243,750    255,928
         Industrial Development
         Revenue Bonds (IDBs)
           Fixed Rate               63,500     63,500     64,000     64,000
           Variable Rate                 -          -    100,000    100,000
         First Collateral Trust
           Bonds                   140,000    141,989          -          -
       Second Mortgage Bonds:
         IDBs (Variable Rate)      328,600    328,600    428,600    428,600
       Unsecured IDBs              579,270    587,344    379,270    413,694
     -----------------------------------------------------------------------

     TEP intends to hold the investment in Debt Securities to maturity
(January 1, 2013).  These Debt Securities are stated at amortized cost which
means the purchase cost is adjusted for the amortization of the discount to
maturity.  We base the fair value of this investment on quoted market prices
for the same or similar debt.

     TEP considers the principal amounts of variable rate debt outstanding to
be reasonable estimates of their fair value.  We determined the fair value of
TEP's fixed rate obligations including the Corporate First Mortgage Bonds,
the First Mortgage Bonds-IDBs (fixed rate), First Collateral Trust Bonds and
the Unsecured IDBs by calculating the present value of the cash flows of each
fixed rate obligation.  We used a rate consistent with market yields
generally available as of December 1998 for 1998 amounts and December 1997
for 1997 amounts for bonds with similar characteristics with respect to:
credit rating, time-to-maturity, and the tax status of the bond coupon for
Federal income tax purposes.  The use of different market assumptions and/or
estimation methodologies may yield different estimated fair value amounts.

NOTE 9.  DIVIDEND LIMITATIONS
- -----------------------------

  UNISOURCE ENERGY

     Our ability to pay cash dividends on common stock outstanding depends,
in part, upon cash flows from our subsidiaries, TEP and Millennium.

  TEP

     In December 1998, TEP paid a $30 million dividend to UniSource Energy,
the holder of all of TEP's common stock.  TEP must meet the following
requirements before paying dividends to UniSource Energy:

   - Bank Credit Agreement

     TEP's bank Credit Agreement allows TEP to pay dividends as long as TEP
maintains compliance with the agreement and meets financial covenants.  As of
December 31, 1998, TEP was in compliance with the terms of the Credit
Agreement.

   - ACC Holding Company Order

     The ACC Holding Company Order does not allow TEP to pay dividends to
UniSource Energy in excess of 75% of its annual earnings until TEP's equity
ratio equals 37.5% of total capitalization, excluding capital lease
obligations.  As of December 31, 1998, TEP was in compliance with this
requirement.

   - Federal Power Act

     This Act states that dividends shall not be paid out of funds properly
included in capital accounts.  TEP's 1998 dividend to UniSource Energy was
paid from current year earnings.

NOTE 10.  COMMITMENTS AND CONTINGENCIES
- ---------------------------------------

  TEP COMMITMENTS - FUEL PURCHASE

     TEP has the following commitments to purchase coal:

   - The Springerville contract expires in 2010, but includes an option to
extend the initial term for ten years.  See Deferred Springerville Contract
Termination Fee in Note 2.
   - The Irvington contract expires in 2015 or at the end of the useful life
of the coal-fired unit, whichever is earlier.
   - The contracts for jointly-owned facilities expire at various dates from
2005 to 2017.  See Jointly-Owned Facilities in Note 6.

     The Springerville and Irvington contracts combined require TEP to take
2.1 million tons of coal per year from 1999 to 2009 at an estimated annual
cost of $62 million in 1999.   The contracts to purchase coal for use at the
jointly-owned facilities require TEP to take 1.5 million tons of coal per
year from 1999 to 2005 at an estimated annual cost of $45 million in 1999.
All of these contracts include a price adjustment clause that will affect the
future cost of coal.

     Each of TEP's coal purchase contracts requires TEP to pay a take-or-pay
charge if certain minimum quantities of coal are not purchased.  Our present
fuel requirements are in excess of the take-or-pay minimums.  However,
sometimes, TEP purchases coal from other suppliers or switches fuel burn from
one generating station to another to reduce overall fuel costs, resulting in
take-or-pay minimum charges.  TEP incurred take-or-pay charges of $3.5
million in 1998, none in 1997 and $4.4 million in 1996.

  COMMITMENTS - ENVIRONMENTAL REGULATION

     Clean Air

     The 1990 Federal Clean Air Act Amendments require reductions of sulfur
dioxide (SO2) and nitrogen oxide (NOx) emissions in two phases, more complex
facility permits and other requirements which are currently in effect.  TEP
is subject only to Phase II of the SO2 and NOx emission reductions which is
effective January 1, 2000.  All of TEP's generating facilities (except
internal combustion turbines) are affected.  TEP spent approximately $1
million in each of 1996, 1997 and 1998 and expects to spend approximately $1
million annually in 1999 and 2000 complying with these requirements.

     In 1993, our generating units affected by Phase II were allocated SO2
Emission Allowances based on past operational history.  Beginning in the year
2000, Phase II generating units must hold Emission Allowances equal to the
level of emissions in the compliance year or pay penalties and offset excess
emissions in future years.  Due to increased energy output at Springerville,
TEP may not have sufficient Emission Allowances to permit normal plant
operation in compliance with the Phase II SO2 regulations.  TEP may have to
purchase additional Emission Allowances.  Based on current estimates of
additional required Emission Allowances and market prices, we believe that
purchases of additional Emission Allowances will not have a material effect
on TEP.

     TEP may incur additional costs to comply with recent and future changes
in federal and state environmental laws, regulations and permit requirements
at existing electric generating facilities.  Compliance with these changes
may result in a reduction in operating efficiency.

     Jointly-Owned Facilities - SO2  Emission Capital Improvements

   - Navajo:  In 1991, the EPA adopted a rule requiring the reduction of
Navajo's SO2 annual emissions by 90% to improve visibility at Grand Canyon
National Park.  TEP's share of the remaining required capital expenditures as
of December 31, 1998 is approximately $4.5 million through 2000.

   - San Juan:  To improve the efficiency of SO2 removal, the existing system
is being replaced.  TEP's estimated share of the remaining costs as of
December 31, 1998 is approximately $2.0 million.

  UNISOURCE ENERGY COMMITMENTS - ENERGY RELATED AFFILIATES

     For a discussion of UniSource Energy's commitments to energy-related
affiliates, see Note 5.

  CONTINGENCIES

     Ruling on Arizona Sales Tax Assessments - Coal Sales

     We received and are protesting sales tax assessments received from the
ADOR alleging that a former TEP subsidiary is liable for sales tax on gross
income from coal sales, transportation and coal-handling services provided to
TEP from November 1985 through May 1996.  Arizona law generally requires
payment of an assessment prior to pursuing the appellate process.  We have
previously paid, under protest, a total of $23 million of the disputed sales
tax assessments.  In September 1996, the Arizona Court of Appeals upheld the
validity of the assessment issued for the period November 1985 through March
1990.  However, in May 1998, the Arizona Supreme Court remanded the case back
to the Arizona Tax Court to be reheard.  The payments previously made will be
refunded if we are successful in the appeals process.

     TEP has recorded an expense and a related liability for the sales taxes
and interest for the period November 1985 through May 1996 that we believe
are probable of incurrence.  On May 31, 1996, the former subsidiary was
merged into TEP.  Because TEP now acquires coal directly from unaffiliated
companies, we do not believe we are liable for sales tax computed on a basis
similar to the assessments described above after May 31, 1996.  For periods
prior to May 31, 1996, we continue to record an estimated interest expense on
the disputed assessments.

     Arizona Sales Tax Assessments - Leases

     The ADOR has issued sales tax assessments to some of TEP's lessors of
generation-related facilities and equipment.  The assessments allege sales
tax liability on a component of rents we paid on the Springerville Unit 1
Leases, the Springerville Common Facilities Leases, the Irvington Lease and
the Springerville Coal Handling Facilities Lease from August 1, 1988 to June
30, 1997.  Due to indemnification provisions in the lease agreements, if the
ADOR prevails, we would be required to reimburse the lessors for the sales
taxes that they pay.  We filed an appeal of the assessments in the Arizona
Tax Court in February 1998.  In July 1998, the Arizona Tax Court upheld the
assessment issued on the Irvington lease for the period August 1988 through
September 1990, and we have appealed the decision.  Arizona law generally
requires payment of an assessment prior to pursuing the appellate process.
Under protest, we paid a total of $2 million of the disputed assessments.
These payments will be refunded if we are successful in the appeals process.

     We have recorded a liability for the probable amount of sales taxes and
interest due as of December 31, 1998.  If the ADOR prevails, we would need to
record an additional expense and related liability.  Even though it is
reasonably possible that the resolution of this issue could result in
approximately $23 million of additional sales tax expense, we do not believe
this outcome is likely.  We do not expect that the resolution of this
assessment will have a material negative impact on the financial statements.
We believe that the ultimate resolution of this issue could occur between two
to four years from now.

     INCOME TAX ASSESSMENTS

     In February 1998, the IRS issued an income tax assessment for the 1992
and 1993 tax years.  The IRS is challenging our treatment of various items
relating to a 1992 financial restructuring, including the amount of NOL and
ITC generated before December 1991 that may be used to reduce taxes in future
periods.

     Due to a financial restructuring, a change in TEP's ownership occurred
for tax purposes in December 1991.  As a result, our use of the NOL and ITC
generated before 1992 may be limited under the tax code.  The IRS is
challenging our calculation of this limitation.  At December 31, 1998, pre-
1992 federal NOL and ITC carryforwards were approximately $209 million and
$23 million, respectively.  In addition to the pre-1992 NOL and ITC which are
subject to the limitation, $168 million of federal NOL at December 31, 1998,
is not subject to the limitation.

     We do not expect the resolution of these issues to have a material
adverse impact on the financial statements.

NOTE 11.  INCOME TAXES
- ----------------------

     Deferred tax assets (liabilities) consist of the following:

                                   UniSource Energy              TEP
                                ---------------------------------------------
                                     December 31,            December 31,
                                   1998       1997         1998       1997
- -----------------------------------------------------------------------------
                                          - Thousands of Dollars -
Gross Deferred Income Tax
 Liabilities:
  Electric Plant - Net          $(559,008) $(568,365)   $(559,008) $(568,365)
  Income Taxes Recoverable
   Through Future Revenues
   Regulatory Asset               (60,692)   (68,680)     (60,692)   (68,680)
  Deferred Inventory Costs        (24,072)   (24,995)     (24,072)   (24,995)
  Deferred Lease Payments         (12,465)   (13,273)     (12,465)   (13,273)
  Property Taxes                   (9,048)    (9,450)      (9,048)    (9,450)
  Other                           (21,092)   (12,809)     (11,673)   (12,809)
- -----------------------------------------------------------------------------
   Gross Deferred Income Tax
    Liability                    (686,377)  (697,572)    (676,958)  (697,572)
- -----------------------------------------------------------------------------
Gross Deferred Income Tax
 Assets:
  Capital Lease Obligations       359,575    364,445      359,575    364,445
  Net Operating Loss
   Carryforwards                  116,046    141,048      116,046    141,048
  Springerville Unit 1
   Disallowed Costs                68,394     67,760       68,394     67,760
  Investment Tax Credit
   Carryforwards                   23,316     26,396       23,316     26,396
  Lease Interest Payable           17,627     18,424       17,627     18,424
  Regulatory Deferred Capital
   Lease Expense                   17,395     17,163       17,395     17,163
  Sales Tax Assessments            14,686     14,406       14,686     14,406
  Financial Restructuring Costs     9,451     10,775        9,451     10,775
  Deferred Gain on Emission
   Allowances                      12,315      6,926       12,315      6,926
  Capital Loss Carryforwards            -      4,520            -      4,520
  Alternative Minimum Tax (AMT)    17,395      5,594       15,326      5,594
  Retiree and Employee Benefits     9,777      8,388        9,777      8,388
  Other                            30,378     16,965       14,552     16,965
- -----------------------------------------------------------------------------
   Gross Deferred Income Tax
    Asset                         696,355    702,810      678,460    702,810
   Deferred Tax Assets
    Valuation Allowance           (57,186)   (67,934)     (57,186)   (67,934)
- -----------------------------------------------------------------------------
     Net Deferred Income Tax
      Liability                 $ (47,208) $ (62,696)   $ (55,684) $ (62,696)
=============================================================================

     We record a Deferred Tax Assets Valuation Allowance for the amount of
Deferred Tax Assets that we do not believe we can use to reduce income taxes
on a future tax return.  The Valuation Allowance reduces the amount of
Deferred Tax Assets to the amount that we believe we can use in the future.
The $11 million decrease in the Deferred Tax Assets Valuation Allowance in
1998 is due primarily to the use of capital loss and investment tax credit
carryforwards.  The $43 million decrease in the deferred tax assets valuation
allowance in 1997 resulted from an increase in the estimated amount of NOLs
that we believe we will use to reduce future taxable income and the use of
NOL carryforwards.

     UniSource Energy and TEP recognize NOL benefits in the income statement
based on changes in the estimated amount of prior period NOLs that are likely
to be used on future tax returns.  A significant factor in estimating this
amount is the average annual book income before income taxes for the prior
three years.  Prior to 1995, UniSource Energy and TEP provided a Deferred Tax
Assets Valuation Allowance against all the NOL carryforwards, ITC
carryforwards and capital loss carryforwards due to the uncertainty of their
future use.  Because results from operations improved, the amount of NOL
carryforwards that UniSource Energy and TEP believe is likely to reduce
future taxable income increased.  Accordingly, UniSource Energy and TEP
recognized in 1997 and 1996 income tax benefits of $43 million and $89
million, respectively, related to the current and expected future use of
federal and state NOL carryforwards.  These benefits are included in Income
Taxes in Other Income (Deductions) in the income statements.  In future
periods when NOLs are used on tax returns to reduce income taxes paid, income
tax expense shown on the income statements will not be reduced.

     At December 31, 1997, both UniSource Energy and TEP had recorded the
amount of prior period NOL benefit that we expect to use on future income tax
returns.  At the present time, we are not able to estimate additional amounts
of NOL benefit that we may recognize in the income statements of either
UniSource Energy or TEP.  This is because there are still open tax years for
which additional assessments may be made and because federal and state NOL
carryforwards expire at various dates.  We do not expect to recognize
additional amounts of NOL benefit until these items are resolved.

     The net deferred income tax liability is included in the balance sheets
in the following accounts:

                                   UniSource Energy              TEP
                                ---------------------------------------------
                                     December 31,            December 31,
                                   1998       1997         1998       1997
- -----------------------------------------------------------------------------
                                          - Thousands of Dollars -

Deferred Income Taxes-Current   $  14,820  $  14,910    $  14,820  $  14,910
Deferred Income Taxes-Noncurrent  (62,028)   (77,606)     (70,504)   (77,606)
- -----------------------------------------------------------------------------
   Net Deferred Income Tax
    Liability                   $ (47,208) $ (62,696)   $ (55,684) $ (62,696)
=============================================================================

Income tax expense (benefit) included in the income statements consist of the
following:











                                                   UniSource Energy
                                            -------------------------------
                                               Years Ended December 31,
                                              1998       1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Operating Expenses:
  Deferred Tax Expense
   Federal                                  $ 22,554  $  15,262  $   7,836
   State                                      (4,182)     4,045      2,019
- ---------------------------------------------------------------------------
    Total                                     18,372     19,307      9,855
  Investment Tax Credit Amortization               -        (10)       (60)
- ---------------------------------------------------------------------------
Total Expense Included in
  Operating Expenses                          18,372     19,297      9,795
- ---------------------------------------------------------------------------
Other Income (Deductions):
  Deferred Tax Expense
   Federal                                    (1,264)     6,505        725
   State                                       1,275      1,648        252
- ---------------------------------------------------------------------------
    Total                                         11      8,153        977
  Reduction in Valuation
   Allowance - Benefit                             -    (43,443)   (88,638)
  Investment Tax Credit Amortization          (4,548)    (3,273)    (4,355)
- ---------------------------------------------------------------------------
Total Benefit Included in Other
  Income (Deductions)                         (4,537)   (38,563)   (92,016)
- ---------------------------------------------------------------------------
Unregulated Energy Business - Net:
  Deferred Tax Expense
   Federal                                    (2,631)    (2,255)        52
   State                                      (1,130)      (583)        14
- ---------------------------------------------------------------------------
Total Benefit Included in Unregulated
  Energy Business - Net                       (3,761)    (2,838)        66
- ---------------------------------------------------------------------------
Total Federal and State Income Tax
     Expense (Benefit)                      $ 10,074  $ (22,104) $ (82,155)
===========================================================================


















                                                          TEP
                                            -------------------------------
                                               Years Ended December 31,
                                              1998       1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Operating Expenses:
  Deferred Tax Expense
   Federal                                  $ 22,554  $  15,262  $   7,836
   State                                      (4,182)     4,045      2,019
- ---------------------------------------------------------------------------
    Total                                     18,372     19,307      9,855
  Investment Tax Credit Amortization               -        (10)       (60)
- ---------------------------------------------------------------------------
Total Expense Included in
  Operating Expenses                          18,372     19,297      9,795
- ---------------------------------------------------------------------------
Other Income (Deductions):
  Deferred Tax Expense
   Federal                                     1,778      4,250        777
   State                                       1,976      1,065        266
- ---------------------------------------------------------------------------
    Total                                      3,754      5,315      1,043
  Reduction in Valuation
   Allowance - NOL Benefit                         -    (43,443)   (88,638)
  Investment Tax Credit Amortization          (4,548)    (3,273)    (4,355)
- ---------------------------------------------------------------------------
Total Benefit Included in Other
  Income (Deductions)                           (794)   (41,401)   (91,950)
- ---------------------------------------------------------------------------
Total Federal and State Income Tax
     Expense (Benefit)                      $ 17,578  $ (22,104) $ (82,155)
===========================================================================

     The differences between the income tax expense (benefit) and the amount
obtained by multiplying pre-tax income by the U.S. statutory federal income
tax rate of 35% are as follows:

                                                   UniSource Energy
                                            -------------------------------
                                              Years Ended December 31,
                                             1998       1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Federal Income Tax Expense
 at Statutory Rate                          $ 13,337  $  21,514  $  13,544
  State Income Tax Expense, Net of
   Federal Deduction                           1,849      3,314      2,081
  Depreciation Differences (Flow Through
   Basis)                                      3,791          -          -
  Investment Tax Credit Amortization          (4,548)    (3,283)    (4,415)
  Reduction in Valuation Allowance -
   NOL Benefit                                     -    (43,443)   (88,638)
  Capital Loss Carryforwards                  (4,463)         -     (5,616)
  Other                                          108       (206)       889
- ---------------------------------------------------------------------------
     Total Federal and State Income
      Tax Expense (Benefit)                 $ 10,074  $ (22,104) $ (82,155)
===========================================================================

                                                          TEP
                                            -------------------------------
                                              Years Ended December 31,
                                             1998       1997       1996
- ---------------------------------------------------------------------------
                                               - Thousands of Dollars -
Federal Income Tax Expense
 at Statutory Rate                          $ 20,739  $  21,514  $  13,544
  State Income Tax Expense, Net of
   Federal Deduction                           2,876      3,314      2,081
  Depreciation Differences (Flow Through
   Basis)                                      3,791          -          -
  Investment Tax Credit Amortization          (4,548)    (3,283)    (4,415)
  Reduction in Valuation Allowance -
   NOL Benefit                                     -    (43,443)   (88,638)
  Capital Loss Carryforwards                  (4,463)         -     (5,616)
  Other                                         (817)      (206)       889
- ---------------------------------------------------------------------------
     Total Federal and State Income
      Tax Expense (Benefit)                 $ 17,578  $ (22,104) $ (82,155)
===========================================================================

     At December 31, 1998, UniSource Energy and TEP had, for federal income
tax purposes:

   - $377 million of NOL carryforwards expiring in 2005 through 2009;
   - $23 million of unused ITC expiring in 2002 through 2005;
   - $18 million of AMT credit which will carry forward to future years.
     See discussion of pre-1992 NOL and ITC in Income Tax Assessments in Note
10.

NOTE 12.  EMPLOYEE BENEFITS PLANS
- ---------------------------------

  VOLUNTARY SEVERANCE PLAN (VSP)

     In May 1996, TEP offered employees a VSP.  The VSP resulted in $14
million of employee termination benefit expense in 1996 for termination
benefits that are included in Voluntary Severance Plan Expense - Net on the
income statement.  Approximately $10 million of the termination benefits were
paid in 1996 with the remaining benefits paid over the following three years.
As a result of partial settlements and curtailments of employee benefit plans
related to the VSP, TEP recognized a $3.4 million gain in 1996 and a $3
million loss in the first quarter of 1997.

  PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS

     TEP has noncontributory pension plans for all regular employees.
Benefits are based on years of service and the employee's average
compensation.  TEP makes annual contributions to the plans that are not
greater than the maximum tax-deductible contribution and not less than the
minimum funding requirement by the Employee Retirement Income Security Act of
1974.  Contributions are intended to provide for both current and future
accrued benefits.  TEP provides supplemental retirement benefits to employees
whose benefits are limited by IRS benefit or compensation limitations.

     TEP also provides health care and life insurance benefits for retirees.
All regular employees may become eligible for these benefits if they reach
retirement age while working for TEP.  The ACC allows TEP to recover through
rates postretirement costs only as benefit payments are made to or on behalf
of retirees.  The postretirement benefits are currently funded entirely on a
pay-as-you-go basis.  Under current accounting guidance, TEP cannot record a
regulatory asset for the excess of expense calculated per Statement of
Financial Accounting Standards No. 106, Employers' Accounting for
Postretirement Benefits Other Than Pensions, over actual benefit payments.

     The actuarial present value of the benefit obligations are measured at
October 1 for our pension plans and December 31 for our other postretirement
benefit plan.  The following table sets forth the plans' funded status and
amounts of retirement plan assets and liabilities recognized in the balance
sheets at December 31, 1998 and 1997:

                                                         Other Postretirement
                                   Pension Benefits            Benefits
                                 --------------------------------------------
                                           Years Ended December 31,
                                   1998       1997         1998       1997
- -----------------------------------------------------------------------------
                                          - Thousands of Dollars -
Change in Benefit Obligation
  Benefit Obligation at
   Beginning of Year             $ 84,542   $ 66,760     $ 30,277   $ 29,602
  Actuarial (Gain) Loss            13,541     19,907       11,975     (2,920)
  Interest Cost                     6,068      4,806        2,068      2,068
  Service Cost                      3,917      2,750        1,004        975
  Benefits Paid                    (3,157)   (16,143)      (1,421)    (1,234)
  Plan Amendment                        -      6,462            -          -
  Curtailment Loss                      -          -            -      1,125
  Special Termination Benefit Loss      -          -            -        661
                                 --------------------------------------------
   Benefit Obligation at End
    of Year                       104,911     84,542       43,903     30,277
                                 --------------------------------------------
Change in Plan Assets
  Fair Value of Plan Assets
   at Beginning of Year            88,316     73,089            -          -
  Actual Return on Plan Assets     (1,797)    28,491            -          -
  Benefits Paid                    (3,157)   (16,143)      (1,421)    (1,234)
  Employer Contributions            3,992      3,332        1,421      1,234
                                 --------------------------------------------
   Fair Value of Plan Assets
    at End of Year                 87,354     88,769            -          -
                                 --------------------------------------------
Reconciliation of Funded Status
  to Balance Sheet
  Funded Status (Difference
    between Benefit Obligation
    and Fair Value of Plan
    Assets)                       (17,557)     4,227      (43,903)   (30,277)
  Unrecognized Net (Gain) Loss     16,562     (6,799)      12,261        286
  Unrecognized Prior Service Cost  12,706     13,957            -          -
  Unrecognized Transition (Asset)
    Obligation                       (568)      (757)      12,156     13,025
                                 --------------------------------------------
    Net Amount Recognized in
     the Balance Sheets          $ 11,143   $ 10,628     $(19,486)  $(16,966)
                                 ============================================
Amounts Recognized in the
  Balance Sheets Consist of:
   Prepaid Benefit Cost Included
     in Other Current Assets     $  7,673   $ 11,094     $      -   $      -
   Accrued Benefit Liability
     Included in Other Liabilities (6,740)    (1,033)     (19,486)   (16,966)
   Intangible Asset Included in
     Deferred Debits               10,210        567            -          -
                                 --------------------------------------------
    Net Amount Recognized        $ 11,143   $ 10,628     $(19,486)  $(16,966)
                                 ============================================

Benefit Obligation and
 Fair Value of Plan Assets
 for Plans with Benefit
 Obligations in Excess of
 Plan Assets:
   Benefit Obligation at
    End of Year                  $104,911   $ 37,897     $ 43,903   $ 30,277
   Fair Value of Plan
    Assets at End of Year        $ 87,354   $ 32,260     $      -   $      -
- -----------------------------------------------------------------------------

     We recorded a transition asset or obligation when we adopted accounting
standards requiring recognition of pension and other postretirement benefit
obligations and costs in the financial statements.  The transition asset or
obligation equaled the difference between the fair value of plan assets and
the accumulated benefit obligation.  The unrecognized transition asset
recognized on the pension plans is being amortized over 15 years.  The
unrecognized transition obligation on the postretirement benefit plan is
being amortized over 20 years.

     Pension Benefits

                                                 Years Ended December 31,
                                                  1998     1997     1996
- --------------------------------------------------------------------------
                                                 - Thousands of Dollars -
Components of Net Pension Cost
  Service Cost of Benefits Earned During Period $ 3,917  $ 2,750  $ 2,835
  Interest Cost on Projected Benefit Obligation   6,068    4,806    5,924
  Expected Return on Plan Assets                 (7,955)  (6,180)  (7,298)
  Amortization of Unrecognized Prior Service
   Cost                                           1,252      669     (128)
  Amortization of Unrecognized Transition Asset    (189)    (160)     921
  Recognized Actuarial (Gain) Loss                  (68)       -     (268)
  Curtailment/Settlement (Gain) Loss                  -        -   (3,407)
- --------------------------------------------------------------------------
     Net Periodic Pension Cost                  $ 3,025  $ 1,885  $(1,421)
==========================================================================

Actuarial Assumptions:                               1998    1997    1996
- --------------------------------------------------------------------------
  Discount Rate - Funding Status                     6.5%    7.3%    8.0%
  Average Compensation Increase                      4.0     4.0     5.0
  Expected Long-Term Rate of Return on Plan Assets   9.0     9.0     9.0
- --------------------------------------------------------------------------


     Other Postretirement Benefits

                                                 Years Ended December 31,
                                                  1998     1997     1996
- --------------------------------------------------------------------------
                                                 - Thousands of Dollars -
Components of Net Postretirement Benefit Cost
  Service Cost of Benefits Earned During Period $ 1,004  $   975  $ 1,025
  Interest Cost on Projected Benefit Obligation   2,068    2,068    2,071
  Amortization of Unrecognized Transition
   Obligation                                       868      868      913
  Amortization of the Unrecognized (Gain) Loss        -        -       42
  Curtailment/Settlement (Gain) Loss                  -    2,272        -
  Special Termination Benefit Loss                    -      661        -
- --------------------------------------------------------------------------
     Net Periodic Postretirement Benefit Cost   $ 3,940  $ 6,844  $ 4,051
==========================================================================

     The accumulated postretirement benefit obligation was determined using a
6.50% and 7.00% discount rate for 1998 and 1997, respectively.  Assumed
health care cost trend rates have a significant effect on the amounts
reported for health care plans.  The health care cost trend rates were
assumed to be 6.5% for 1999, gradually declining to 4.0% in 2003 and
thereafter.  A one-percentage-point change in assumed health care cost trend
rates would have the following effects on the December 31, 1998 amounts:

                                         One-Percentage-     One-Percentage-
                                         Point Increase      Point Decrease
     -----------------------------------------------------------------------
                                               - Thousands of Dollars -
     Effect on Total of Service and
       Interest Cost Components                $   513            $   (313)
     Effect on Postretirement Benefit
       Obligation                              $ 6,565            $ (5,319)
     -----------------------------------------------------------------------

  DEFINED CONTRIBUTION PLANS

     All regular employees may contribute up to 15 percent of their pre-tax
compensation, subject to certain limitations, in TEP's voluntary, defined
contribution 401(k) plans.  TEP contributes cash to the account of each
participant based on each participant's contributions not exceeding 4.5
percent of the participant's compensation.  Participants direct the
investment of contributions to their account be invested in certain
investment funds.  In 1998, 1997 and 1996, TEP incurred approximately $2
million annually in expense related to these plans.

  STOCK OPTION PLANS

     On May 20, 1994, the Shareholders approved two stock option plans, the
1994 Outside Director Stock Option Plan (1994 Directors' Plan) and the 1994
Omnibus Stock and Incentive Plan (1994 Omnibus Plan).

     The 1994 Directors' Plan provided for the annual grant of 1,200 non-
qualified stock options to each eligible director at an exercise price equal
to the market price of the common stock at the grant date, beginning January
3, 1995.  These options vest over three years, become exercisable in one-
third increments on each anniversary date of the grant and expire on the
tenth anniversary.  In December 1998, the Board of Directors approved an
increase in the annual grant of non-qualified stock options to 2000 beginning
January 1999.

     The 1994 Omnibus Plan allows the Compensation Committee, a committee of
non-employee directors, to grant the following types of awards to each
eligible employee:  stock options; stock appreciation rights; restricted
stock; performance units; performance shares; and dividend equivalents.  The
total number of shares of UniSource Energy stock which may be awarded under
the Omnibus Plan cannot exceed 1.6 million.

     The Compensation Committee granted stock options to key employees during
1998, 1997 and 1996 and to all employees during 1994.  These stock options
were granted at exercise prices equal to the market price of the common stock
at the grant date.  These options vest over three years, become exercisable
in one-third increments on each anniversary date of the grant and expire on
the tenth anniversary.

     A summary of the activity of the 1994 Directors' Plan and 1994 Omnibus
Plan is as follows:

                           1998              1997              1996
- -------------------------------------------------------------------------
                             Weighted          Weighted          Weighted
                             Average           Average           Average
                             Exercise          Exercise          Exercise
                     Shares   Price    Shares   Price    Shares   Price
- -------------------------------------------------------------------------
Options Outstanding,
 Beginning of Year   800,541  $15.17   688,123  $15.30   525,522  $16.26
  Granted            222,446  $15.69   144,190  $14.59   212,684  $13.16
  Exercised          (74,177) $14.79    (6,630) $16.25    (2,886) $16.25
  Forfeited          (60,351) $14.66   (25,142) $15.18   (47,197) $16.25
                     --------          --------          --------
Options Outstanding,
 End of Year         888,459  $15.37   800,541  $15.17   688,123  $15.30
                     ========          ========          ========
Options Exercisable,
 End of Year         549,254  $15.55   491,763  $15.17   286,944  $16.27

Option Price Range of Options Outstanding at December 31, 1998:  $13.00
 to $18.13

Weighted Average Remaining Contractual Life at December 31, 1998:  7.25
- -------------------------------------------------------------------------

     We apply Accounting Principles Board Opinion No. 25, Accounting for
Stock Issued to Employees, in accounting for our stock option plans.
Accordingly, we have not recognized any compensation cost for the plans
during 1996 though 1998.  We have also adopted the disclosure-only provisions
of Statement of Financial Accounting Standards No. 123, Accounting for Stock-
Based Compensation (FAS 123).  Had our compensation costs for the stock
option plans been determined based on the fair value at the grant date for
awards in 1998, 1997 and 1996 consistent with the provisions of FAS 123, net
income and net income per average share would have been reduced to the pro
forma amounts indicated below:




                                                Years Ended December 31,
                                               1998       1997       1996
- ----------------------------------------------------------------------------
                                                 - Thousands of Dollars -
                                                  (except per share data)
Net Income - As Reported                     $ 28,032   $ 83,572   $120,852
             Pro Forma                       $ 27,724   $ 83,201   $120,594

Basic Earnings Per Share - As Reported          $0.87      $2.60      $3.76
                           Pro Forma            $0.86      $2.59      $3.75

Diluted Earnings per Share - As Reported        $0.87      $2.59      $3.75
                             Pro Forma          $0.86      $2.58      $3.74
- -----------------------------------------------------------------------------

     The fair value of each stock option grant is estimated on the date of
grant using the Black-Scholes option pricing model with the following
weighted average assumptions:

                                      1998        1997      1996
     --------------------------------------------------------------
     Expected life (years)               4           3          4
     Interest rate                    5.41%       6.16%      6.51%
     Volatility                      23.59%      23.15%     23.51%
     Dividend yield                   None        None       None
     --------------------------------------------------------------

NOTE 13.  WARRANTS
- ------------------

     In 1998, we exchanged a portion of the outstanding TEP Warrants for
warrants exercisable into UniSource Energy Common Stock.  The remaining 4.6
million of TEP Warrants entitle the holder of five warrants to purchase one
share of TEP common stock for $16.00.  The TEP common stock which would be
issued upon the exercise of TEP Warrants cannot be converted into UniSource
Energy Common Stock.  Currently, UniSource Energy owns 100% of the common
stock of TEP and TEP common stock is not publicly traded.  Each new UniSource
Energy Warrant entitles the holder to purchase one share of UniSource Energy
Common Stock for $16.00.

     After the exchange, the following warrants are outstanding:

   - 1.5 million of UniSource Energy Warrants expiring March 15, 1999;
   - 1.5 million of UniSource Energy Warrants expiring December 15, 2000; and
   - 4.6 million of TEP Warrants expiring December 15, 2002; exercisable for
920,000 shares of TEP common stock.

NOTE 14.  SHAREHOLDER RIGHTS PLAN
- ---------------------------------

     In March 1999, UniSource Energy adopted a Shareholder Rights Plan.  On
April 1, 1999, each Common Stock shareholder will receive one Right.
Initially, each Right will allow shareholders to purchase one ten-thousandth
of a share of UniSource Energy's Series X Preferred Stock for $50, subject to
adjustment.  The Rights will only be exercisable if a person or group
acquires or commences a tender offer to acquire 15% or more of UniSource
Energy Common Stock.  Upon any such acquisition, each Right would entitle the
holder to purchase a number of shares of UniSource Energy Common Stock (or,
in the case of a merger of UniSource Energy into another person or group,
common stock of the acquiring person) having a fair market value equal to
twice the purchase price.  In no event will the Rights be exercisable by a
person which has acquired 10% or more of the Common Stock.  At any time until
any person or group has acquired 15% or more of the Common Stock, UniSource
Energy may redeem the Rights at a redemption price of $0.001 per Right.
Initially, the Rights will trade automatically with the Common Stock when it
is bought and sold.  The Rights will expire on March 31, 2009.

NOTE 15.  SUPPLEMENTAL CASH FLOW INFORMATION
- --------------------------------------------

     We define Cash and Cash Equivalents as cash (unrestricted demand
deposits) and all highly liquid investments purchased with a maturity of
three months or less.  A reconciliation of net income to net cash flows from
operating activities follows:

                                                    UniSource Energy
                                           ----------------------------------
                                                Years Ended December 31,
                                              1998        1997        1996
- -----------------------------------------------------------------------------
                                                - Thousands of Dollars -

Net Income                                  $ 28,032    $ 83,572    $120,852
Adjustments to Reconcile Net Income
 to Net Cash Flows
  Depreciation and Amortization Expense       90,358      86,405      98,246
  Deferred Income Taxes and Investment
   Tax Credit                                    966     (23,089)    (83,722)
  Lease Payments Deferred                     32,624      33,679      30,756
  Deferred Springerville Unit 2 Costs              -           -        (286)
  Regulatory Amortizations, Net of Interest
   Imputed on Losses Recorded at
   Present Value                               3,657      (3,485)    (16,544)
  Reversal of Loss Provision                       -     (10,154)     (8,472)
  Deferred Contract Termination Fee           (6,154)    (38,077)          -
  Unremitted (Earnings) Losses of
   Unconsolidated Subsidiaries                 5,678       5,625        (123)
  Emission Allowances                         11,368     (11,463)      2,353
  Other                                        3,338        (437)     (3,913)
  Changes in Assets and Liabilities which
   Provided (Used) Cash Exclusive of
   Changes Shown Separately
    Accounts Receivable                       (1,542)     (5,320)     (4,188)
    Materials and Fuel                        (2,223)     (3,649)     11,812
    Accounts Payable                             977       6,103       1,644
    Taxes Accrued                              2,770         390       8,311
    Other Current Assets and Liabilities      (1,347)      4,191      (8,261)
    Other Deferred Assets and Liabilities     (5,757)      1,992       4,467
- -----------------------------------------------------------------------------
Net Cash Flows - Operating Activities       $162,745    $126,283    $152,932
=============================================================================









                                                           TEP
                                           ----------------------------------
                                                Years Ended December 31,
                                              1998        1997        1996
- -----------------------------------------------------------------------------
                                                - Thousands of Dollars -

Net Income                                  $ 41,676    $ 83,572    $120,852
Adjustments to Reconcile Net Income
 to Net Cash Flows
  Depreciation and Amortization Expense       90,358      86,405      98,246
  Deferred Income Taxes and Investment
   Tax Credit                                  6,910     (23,089)    (83,722)
  Lease Payments Deferred                     32,624      33,679      30,756
  Deferred Springerville Unit 2 Costs              -           -        (286)
  Regulatory Amortizations, Net of Interest
   Imputed on Losses Recorded at
   Present Value                               3,657      (3,485)    (16,544)
  Reversal of Loss Provision                       -     (10,154)     (8,472)
  Deferred Contract Termination Fee           (6,154)    (38,077)          -
  Unremitted (Earnings) Losses of
   Unconsolidated Subsidiaries                (1,017)      5,625        (123)
  Emission Allowances                         11,368     (11,463)      2,353
  Interest Accrued on Note Receivable from
   UniSource Energy                           (9,329)          -           -
  Other                                        6,478        (437)     (3,913)
  Changes in Assets and Liabilities which
   Provided (Used) Cash Exclusive of
   Changes Shown Separately
    Accounts Receivable                       (1,924)     (5,320)     (4,188)
    Materials and Fuel                        (2,218)     (3,649)     11,812
    Accounts Payable                           4,833       6,103       1,644
    Taxes Accrued                              2,717         390       8,311
    Other Current Assets and Liabilities       7,638       4,191      (8,261)
    Other Deferred Assets and Liabilities     (5,759)      1,992       4,467
- -----------------------------------------------------------------------------
Net Cash Flows - Operating Activities       $181,858    $126,283    $152,932
=============================================================================

     Non-cash investing and financing activities of UniSource Energy and TEP
that affected recognized assets and liabilities but did not result in cash
receipts or payments were as follows:

                                                Years Ended December 31,
                                              1998        1997        1996
- -----------------------------------------------------------------------------
                                                - Thousands of Dollars -
Capital Lease Obligations                   $ 13,613    $ 11,788    $  8,336
Proceeds from the Issuance of Long-Term
  Debt                                       290,699     379,270      31,400
Payments to Retire Long-Term Debt           (286,878)   (356,810)    (14,700)
Minimum Pension Liability                     10,036           -           -

     The non-cash change in capital lease obligations represents interest
accrued for accounting purposes in excess of interest payments.

     When issuing new bonds and redeeming outstanding bonds, a trustee may
hold the proceeds from our issuance of new long-term debt and use the
proceeds to redeem previously outstanding long-term debt.  When this occurs,
the Proceeds from the Issuance of Long-Term Debt and the related Payments to
Retire Long-Term Debt are not reported in our cash flow statements because
these transactions did not affect our cash balances.

NOTE 16.  EARNINGS PER SHARE (EPS)
- ----------------------------------

     Basic EPS is computed by dividing net income by the weighted average
number of common shares outstanding during the period.  Diluted EPS assumes
that proceeds from the hypothetical exercise of stock options and other stock-
based awards are used to repurchase outstanding shares of stock at the
average fair market price during the reporting period.  The following table
shows the amounts used in computing earnings per share and the effects of
potential dilutive common stock on the weighted average number of shares.

                                                Years Ended December 31,
                                               1998       1997       1996
   ------------------------------------------------------------------------
                                                 - Thousands of Dollars -
   Basic Earnings Per Share:                      (except per share data)
   Numerator: Net Income                     $ 28,032   $ 83,572   $120,852
   Denominator: Average Shares
     of Common Stock - Outstanding             32,178     32,138     32,136
   ------------------------------------------------------------------------
   Basic Earnings Per Share                  $   0.87   $   2.60   $   3.76
   ========================================================================

   Diluted Earnings per Share:
   Numerator: Net Income                     $ 28,032   $ 83,572   $120,852
   Denominator: Average Shares
     of Common Stock - Outstanding             32,178     32,138     32,136
   Effect of Dilutive Securities:
     Warrants                                      79         53         81
     Options                                       90         87         36
   ------------------------------------------------------------------------
     Total Shares                              32,347     32,278     32,253
   ------------------------------------------------------------------------
   Diluted Earnings Per Share                $   0.87   $   2.59   $   3.75
   ========================================================================

     Options to purchase 460,000 shares of common stock at $16.25 per share
were outstanding at the end of the year 1998 but were not included in the
computation of diluted EPS because the options' exercise price was greater
than the average market price of the common shares.

     4.6 million of the 7.6 million warrants outstanding are exercisable into
TEP common stock.  See Note 13.  However, the dilutive effect is the same as
it would be if the warrants were exercisable into UniSource Energy Common
Stock.










NOTE 17.  QUARTERLY FINANCIAL DATA (UNAUDITED)
- ----------------------------------------------

                                                 UniSource Energy
                                     ---------------------------------------
                                       First    Second     Third    Fourth
- ----------------------------------------------------------------------------
                                             - Thousands of Dollars -
                                              (except per share data)
1998
Operating Revenue                    $160,941  $179,603  $253,229  $174,903
Operating Income                       23,820    29,866    54,610    26,892
NOL Benefit Recognition (see Note 11)       -         -         -         -
Net Income (Loss)                      (7,035)    1,058    33,673       336
Basic Earnings Per Share                (0.22)     0.03      1.05      0.01
Diluted Earnings Per Share              (0.22)     0.03      1.05      0.01
- ----------------------------------------------------------------------------
1997
Operating Revenue                    $154,281  $182,970  $231,089  $161,553
Operating Income                       20,790    33,830    56,110    23,293
NOL Benefit Recognition (see Note 11)  14,318    14,975    13,120     1,030
Net Income (Loss)                      11,492    29,901    43,415    (1,236)
Basic Earnings Per Share                 0.36      0.93      1.35     (0.04)
Diluted Earnings Per Share               0.36      0.93      1.34     (0.04)
- ----------------------------------------------------------------------------

                                                       TEP
                                     ---------------------------------------
                                      First    Second     Third    Fourth
- ----------------------------------------------------------------------------
1998
Operating Revenue                    $161,003  $179,686  $253,280  $175,021
Operating Income                       23,882    29,949    54,661    27,010
Interest Income - Note Receivable
  from UniSource Energy                 2,300     2,326     2,352     2,351
NOL Benefit Recognition (see Note 11)       -         -         -         -
Net Income (Loss)                      (1,607)    8,073    29,374     5,836
- ----------------------------------------------------------------------------
1997
Operating Revenue                    $154,281  $182,970  $231,089  $161,553
Operating Income                       20,790    33,830    56,110    23,293
NOL Benefit Recognition (see Note 11)  14,318    14,975    13,120     1,030
Net Income (Loss)                      11,492    29,901    43,415    (1,236)
- ----------------------------------------------------------------------------

     DUE TO SEASONAL FLUCTUATIONS IN TEP'S SALES, UNUSUAL ITEMS AND THE
RECOGNITION OF NOL BENEFITS, THE QUARTERLY RESULTS ARE NOT INDICATIVE OF
ANNUAL OPERATING RESULTS.  THE PRINCIPAL UNUSUAL ITEMS INCLUDE:

   - FIRST QUARTER 1997: SEE NOTE 12 REGARDING THE VSP RELATED AMOUNTS
RECORDED.
   - SECOND QUARTER 1997: UPON DISSOLUTION OF CERTAIN SUBSIDIARIES THAT WERE
PART OF TEP'S FORMER INVESTMENT OPERATIONS, TEP REVERSED A LOSS PROVISION,
RECORDED IN PRIOR YEARS, RESULTING IN $10.2 MILLION OF INCOME.
   - FOURTH QUARTER 1997: TEP RECEIVED A $2.8 MILLION INTEREST REFUND
RELATING TO INCOME TAXES.  THIS INTEREST REFUND IS INCLUDED IN OTHER INCOME
(DEDUCTIONS) ON THE 1997 INCOME STATEMENT.
   - THIRD QUARTER 1998: TEP CHANGED ITS METHOD OF ESTIMATING UNBILLED
REVENUES TO MORE ACCURATELY REFLECT REVENUES BETWEEN MONTHS.  IF WE HAD
CONTINUED USING THE PREVIOUS METHOD OF CALCULATING UNBILLED REVENUES,
REVENUES FOR THE THIRD QUARTER OF 1998 WOULD HAVE BEEN $7.1 MILLION GREATER.
   - FOURTH QUARTER 1998: SEE UTILITY OPERATING REVENUES IN NOTE 1 REGARDING
THE IMPACT OF CHANGING THE METHOD OF CALCULATING UNBILLED REVENUES ON
REVENUES FOR THE FOURTH QUARTER.

<PAGE>





Financial Statement Schedules














                           New Energy Ventures, Inc.

                                 Report and
                      Consolidated Financial Statements

                          December 31, 1998 and 1997








































                        Report of Independent Accountants


To the Board of Directors and Stockholders of
New Energy Ventures, Inc.

In our opinion, the accompanying consolidated balance sheets and the related
consolidated statements of operations, of stockholders' equity and of cash
flows present fairly, in all material respects, the financial position of New
Energy Ventures, Inc. and its subsidiaries ("NEV") at December 31, 1998 and
1997, and the results of their operations and their cash flows for the years
then ended in conformity with generally accepted accounting principles. These
financial statements are the responsibility of NEV's management; our
responsibility is to express an opinion on these financial statements based
on our audits. We conducted our audits of these statements in accordance with
generally accepted auditing standards which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on
a test basis, evidence supporting the amounts and disclosures in the
financial statements, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for the opinion expressed above.


PricewaterhouseCoopers LLP
Los Angeles, California
March 30, 1999

































NEW ENERGY VENTURES, INC.
CONSOLIDATED BALANCE SHEET
- ---------------------------------------------------------------------

                                               As of December 31,
                                          ---------------------------
                                               1998          1997
                                          -------------  ------------
                             Assets

Current assets:
  Cash and cash equivalents               $ 16,558,000   $  3,426,000
  Restricted cash                           25,406,000              -
  Accounts receivable, net of $905,000
    and $0, respectively, allowance for
    doubtful accounts                       72,630,000      4,897,000
  Prepaids and other current assets            508,000         83,000
                                         -------------  -------------
                                           115,102,000      8,406,000
Properties and equipment, net                1,690,000        630,000
Other assets                                 4,085,000      1,500,000
                                         -------------  -------------
                                          $120,877,000   $ 10,536,000
                                         =============  =============

                Liabilities and Stockholders' Equity

Current liabilities:
  Accounts payable                        $  1,493,000   $    872,000
  Payable to joint ventures                  2,595,000              -
  Payable to utility distribution
    companies                               36,693,000              -
  Accrued purchased power                   35,875,000      6,326,000
  Current portion of unrealized
    losses on adverse commitments            5,216,000              -
  Deposits and deferred revenue              3,423,000              -
  Other current liabilities                  4,670,000        674,000
                                         -------------  -------------
                                            89,965,000      7,872,000
                                         =============  =============

Long-term liabilities:
  Notes to stockholder                      36,805,000      4,000,000
  Long-term debt                            10,000,000              -
  Deferred purchased power
    obligation (Note 8)                     17,368,000      5,254,000
  Other long-term liabilities                2,729,000        397,000
                                         -------------  -------------
                                            66,902,000      9,651,000
                                         -------------  -------------
                                           156,867,000     17,523,000
                                         -------------  -------------
Commitments and contingencies
  (see Notes 8 and 9)
Minority interest (of which
  $4,000,000 is manditorily redeemable)      9,174,000              -
                                         -------------  -------------
Stockholders' Equity
  Common stock, $.001 par value;
    20,000,000 authorized; 10,000,000
    and 0 shares issued and outstanding         10,000              -
  Additional paid in capital                11,881,000     10,166,000
  Accumulated deficit                      (57,055,000)   (17,153,000)
                                         -------------  -------------
                                           (45,164,000)    (6,987,000)
                                         -------------  -------------
                                          $120,877,000   $ 10,536,000
                                         =============  =============

See accompanying notes to consolidated financial statements.




















































NEW ENERGY VENTURES, INC.
CONSOLIDATED STATEMENT OF OPERATIONS
- ---------------------------------------------------------------------
                                             Year ended December 31,
                                         ----------------------------
                                               1998          1997
                                         -------------  -------------
Retail customer revenue                   $206,093,000   $  1,524,000
Less:  Utility distribution
  company payments                         102,158,000              -
                                         -------------  -------------
                                           103,935,000      1,524,000
Cost of sales                              108,289,000      1,530,000
Net unrealized losses on adverse
  commitments                               10,570,000              -
                                         -------------  -------------
                                           (14,924,000)        (6,000)
Proprietary purchases and sales, net         2,567,000     (3,242,000)
                                         -------------  -------------
                                           (12,357,000)    (3,248,000)
                                         -------------  -------------
Operating expenses
  Employee costs                            13,850,000      5,147,000
  Outside services                           6,781,000      2,542,000
  Other general and administrative           8,604,000      3,208,000
                                         -------------  -------------
                                            29,235,000     10,897,000
                                         -------------  -------------
                                           (41,592,000)   (14,145,000)
                                         -------------  -------------
Other income and expense, net
  Gain from settlement                       4,000,000              -
  Interest expense                          (3,008,000)       (92,000)
  Other                                        229,000         63,000
                                         -------------  -------------
                                             1,221,000        (29,000)
                                         -------------  -------------
Net loss before minority interest          (40,371,000)   (14,174,000)
Minority interest in loss of
  consolidated subsidiary                      469,000              -
                                         -------------  -------------
    Net loss                              $(39,902,000)  $(14,174,000)
                                         =============  =============

See accompanying notes to consolidated financial statements.
















NEW ENERGY VENTURES, INC.
CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
- --------------------------------------------------------------------------

                                                 Additional
                                       Common     Paid in      Accumulated
                           Shares      Stock      Capital        Deficit
Total
                     ---------  -------  --------    ----------  ----------

As of December 31, 1996           -    $     -  $ 3,183,000  $ (2,979,000)  $
204,000
  Capital contributions           -          -    6,582,000             -
6,582,000
  Employee stock awards           -          -      401,000             -
401,000
  Net loss                        -          -            -   (14,174,000)
(14,174,000)
                     ---------  -------  ---------   ----------  ----------
As of December 31, 1997           -          -   10,166,000   (17,153,000)
(6,987,000)
                     ---------  -------  ---------   ----------  ----------

  Preference
    contribution                  -          -    9,000,000             -
9,000,000  Equity to debt
    conversion                    -          -   (8,448,000)            -
(8,448,000)
  Preferred return
    conversion                    -          -   (1,768,000)            -
(1,768,000)  Conversion to a    corporation          10,000,000     10,000
(10,000)            -              -  Issuance of
    convertible debt              -          -    1,719,000             -
1,719,000  Employee stock awards           -          -    1,222,000
- -      1,222,000  Net loss                        -          -            -
(39,902,000)   (39,902,000)                         ---------  -------  -----
- ----   ----------  ----------
As of December 31, 1998  10,000,000    $10,000  $11,881,000  $(57,055,000)
$(45,164,000)
                         ==========   ========  ===========   ============
============

See accompanying notes to consolidated financial statements.


























NEW ENERGY VENTURES, INC.
CONSOLIDATED STATEMENT OF CASH FLOWS
- ---------------------------------------------------------------------
                                             Year ended December 31,
                                         ----------------------------
                                               1998          1997
                                         -------------  -------------
Cash flows from operating activities:
  Net loss                                $(39,902,000)  $(14,174,000)
  Adjustments to reconcile net loss
   to cash used in operating
   activities:
    Unrealized losses on adverse
     commitments                            10,570,000              -
    Realization of losses on
     adverse commitments                    (4,096,000)             -
    Provision for doubtful accounts          1,167,000              -
    Minority interest in net loss             (469,000)             -
    Other noncash expense                    1,998,000        491,000
Changes in assets and liabilities:
    Restricted cash                        (25,406,000)             -
    Accounts receivable                    (68,900,000)    (4,897,000)
    Prepaids and other current assets         (425,000)       (60,000)
    Accounts payable                           621,000        838,000
    Payable to joint ventures                2,595,000              -
    Payable to utility distribution
     companies                              36,693,000              -
    Accrued purchased power                 29,549,000      6,326,000
    Deposits and deferred revenue            3,423,000              -
    Other current liabilities                3,996,000        608,000
    Deferred purchased power
     obligation                             12,114,000      5,254,000
    Other liabilities                        1,074,000        359,000
                                         -------------  -------------
                                           (35,398,000)    (5,255,000)
                                         -------------  -------------
Cash flows from investing activities:
  Capital expenditures                      (1,385,000)      (646,000)
  Acquisition of distribution rights        (2,500,000)    (1,500,000)
  Sale of minority interest in
        subsidiary, net                      9,643,000              -
                                         -------------  -------------
                                             5,758,000     (2,146,000)
                                         -------------  -------------
Cash flows from financing activities:
  Proceeds from long-term debt              34,000,000      4,000,000
  Debt issuance costs                         (228,000)             -
  Preference contributions                   9,000,000              -
  Capital contributions                              -      6,582,000
                                         -------------  -------------
                                            42,772,000     10,582,000
                                         -------------  -------------
Cash and cash equivalents:
  Net change in cash and cash
   equivalents                              13,132,000      3,181,000
  Beginning of period                        3,426,000        245,000
                                         -------------  -------------
                                          $ 16,558,000   $  3,426,000
                                         =============  =============

Supplemental cash flow information:
Cash paid during the year for:
    Interest                              $    237,000   $          -
    Income taxes                          $          -   $          -
Non-cash investing and financing
  activities:
    Conversion of equity to notes, net    $ 10,216,000   $          -
    Conversion of notes                   $ 13,000,000   $          -
    Issuance of convertible debt          $ (1,719,000)  $          -
    Employee stock awards                 $  1,222,000   $    401,000

See accompanying notes to consolidated financial statements.


















































New Energy Ventures, Inc.
Notes to Consolidated Financial Statements
- -----------------------------------------------------------------------------

NOTE 1: The Company

New Energy Ventures, Inc. ("NEV") was organized in January 1995 as a
subchapter S corporation. On February 6, 1995, NEV entered into a consulting
agreement (the "Agreement") with Tucson Electric Power Company ("TEP"), a
wholly-owned subsidiary of UniSource Energy Corporation ("UniSource Energy").
Under the terms of the Agreement, as amended, TEP agreed to provide funding
for operating expenses to NEV in exchange for an option to acquire 50% of the
capital stock of NEV or, at the option of the parties, to acquire a 50%
interest in a newly organized limited liability company formed through the
contribution of the assets of NEV.

On September 1, 1997, TEP exercised its option and the Agreement was
terminated. In accordance with the terms of the Agreement, NEV was
reorganized as a limited liability company. All tangible and intangible
assets and liabilities obtained and incurred by NEV during the term of the
Agreement were contributed to the newly formed organization. The assets and
liabilities transferred were accounted for at historical cost in a manner
similar to a pooling of interests. TEP's interest in NEV was subsequently
transferred to MEH Corporation ("MEH"), an indirect wholly-owned subsidiary
of UniSource Energy.

On October 9, 1998, NEV changed its form of organization to its present form
as a Delaware corporation. The capital accounts prior to the conversion date
have been reclassified to reflect NEV's current form of organization.

Nature of Operations

NEV was formed to provide electricity, energy products and services, and
technology-based energy solutions to customers in deregulating energy
markets. NEV also engages in wholesale purchases and sales to support its
retail customer base and for other proprietary purposes.

Retail Electricity and Services

NEV currently serves retail electricity customers in certain Eastern and
Western states where markets have opened to competition. NEV establishes
separate subsidiaries in each of the major markets in which it intends to
compete. Through its wholly-owned subsidiary, NEV California, L.L.C. ("NEV
California"), NEV commenced substantive operations as a retail energy
provider in California on March 31, 1998. NEV expanded operations in June
1998, when NEV East, L.L.C. ("NEV East") began serving customers in New York
City. NEV East has also delivered energy under limited pilot programs in
Pennsylvania and upstate New York since November 1997 and served customers in
Rhode Island from July 1997 to December 1997.

In addition, during the year ended December 31, 1998, NEV established NEV
Midwest, L.L.C. and NEV Texas, L.L.C. for the purpose of competing in other
competitive markets across the nation.

NEV typically enters into one to three year electricity supply contracts with
its retail customers. These contracts include shared savings agreements,
fixed savings arrangements and fixed price supply contracts. Under the terms
of its typical shared savings agreements, NEV receives a contractually agreed-
upon percentage of the customer's savings compared to the applicable tariff
rate, market clearing price or California Power Exchange price, plus a
volumetric transaction fee.

NEV is also developing products and services in the area of energy efficiency
and information systems for the purpose of enhancing the overall efficiency
of its customers' facilities and to avail its customers of more timely energy
information.

Technology-Based Energy Solutions

NEV's wholly-owned subsidiary NEV Technologies, L.L.C. ("NEV Technologies")
was established to distribute and service advanced technology, energy
generation products. NEV has exclusive distribution agreements with
AlliedSignal Power Systems, Inc. ("AlliedSignal") to market and distribute
its distributed generation products in the Western United States and certain
Pacific Rim nations. In addition, on June 15, 1998, NEV Technologies formed
two joint ventures, NEVTech Americas, L.L.C. ("NEVTech Americas") and NEVTech
Pacifica, L.L.C. ("NEVTech Pacifica"), to distribute and service
AlliedSignal's distributed generation products in certain countries located
in South America and the South Pacific.

Wholesale Purchases and Sales

NEV engages in wholesale purchases and sales activities to generate savings
for its retail customers and for proprietary purposes (see Note 8).

NOTE 2: Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions
that affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the financial statements and
the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates.

Principles of Consolidation

The consolidated financial statements include the accounts of NEV and its
wholly-owned subsidiaries. All significant intercompany transactions and
balances have been eliminated. NEV accounts for NEV Technologies' investments
in NEVTech Americas and NEVTech Pacifica under the equity method of
accounting.

Revenue Recognition

Retail revenues consist of billings to customers for consumption of
electricity and accruals for electricity sold but not yet billed. In
California, revenues include amounts related to transmission and distribution
services provided by the local utility distribution companies ("UDCs"). NEV
estimates the portion of the bill related to UDC services based on historical
and other billing information provided by the UDCs and any difference between
billed and actual costs is adjusted through subsequent billings.

In California, NEV procures energy through bilateral contracts, the
California Power Exchange and the over-the-counter market to reduce costs for
its shared savings and fixed savings retail customers. Savings generated
through these activities are pooled and distributed over a rolling twelve-
month period as a reduction to the NEV energy price charged to non-fixed
price retail customers. The amount of energy savings applicable to retail
customers is established on a monthly basis. There were no undistributed
savings as of December 31, 1998.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and highly liquid investments
with original maturities of three months or less. The carrying amount of cash
and cash equivalents approximates fair value because of the short maturity of
these instruments.

Restricted Cash

Restricted cash includes cash receipts from California retail customer sales.
These amounts are held as collateral by Donaldson, Lufkin & Jenrette, Inc.
("DLJ") for guarantees issued to the UDCs on behalf of NEV California. On a
daily basis, the estimated non-UDC portion of customer cash receipts are
transferred to NEV's general cash account; UDC-related receipts are
transferred as needed to remit UDC payments.

Properties and Equipment, Net

Properties and equipment are stated at cost. Depreciation is computed using
the straight-line method based on the estimated lives of the assets as
follows: computer hardware and software, 3 to 5 years; leasehold
improvements, furniture and fixtures, and office and general equipment, 5
years.

Employee Stock Plans

Compensation expense related to employee stock awards is recorded on a
straight-line basis over the applicable vesting period based on the fair
value of the stock at the measurement date as determined by an independent
valuation.

Purchase and Sale Commitments

NEV enters into purchase and sale commitments for energy, transmission and
capacity to support its retail customer load and for other proprietary
purposes. NEV uses accrual accounting to account for its over-the-counter
commodity contracts. Under this method, NEV evaluates over-the-counter
contracts to determine if changes in market conditions have resulted in
unrealized gains or losses on those contracts. Gains on non-exchange traded
contracts are recognized when realized; however, unrealized losses are
recorded in the period in which they are identified (see Note 8). Gains and
losses, and the related costs paid or premiums received, are recognized
currently in income. Gains and losses related to activities to support NEV's
retail customer base are included in Cost of sales. All other wholesale
activities are included in Proprietary purchases and sales, net.

New Accounting Standards

In March 1998, the American Institute of Certified Public Accountants issued
Statement of Position ("SOP") 98-1, Accounting for the Costs of Computer
Software Developed or Obtained for Internal Use." This SOP provides guidance
on accounting for certain costs in connection with obtaining or developing
computer software for internal use and requires that entities capitalize such
costs once certain criteria are met. NEV currently expenses these costs as
incurred. NEV adopted SOP 98-1 on January 1, 1999, as required.

In November 1998, the Emerging Issues Task Force ("EITF") of the Financial
Accounting Standards Board ("FASB") reached a consensus related to the
accounting for energy trading activities. In accordance with EITF 98-10,
energy trading contracts must be marked to market with the gains and losses
included in earnings and separately disclosed in the financial statements.
NEV adopted EITF 98-10 on January 1, 1999, as required. NEV has not
determined the impact that adoption of this statement will have on its
consolidated financial statements.

In June 1998, the FASB issued Statement of Financial Accounting Standards No.
133, Accounting for Derivative Instruments and Hedging Activities, effective
for fiscal years beginning after June 15, 1999. Statement 133 requires
companies to record derivatives on the balance sheet as assets and
liabilities, measured at fair value. Gains and losses resulting from changes
in value of these derivatives would be reported in income or other
comprehensive income, depending on the use of the derivative and whether it
qualifies for hedge accounting. NEV is evaluating the timing of adoption of
Statement 133 and does not believe it will have a material impact on its
result of operations.

Reclassifications

Certain prior period amounts have been reclassified to conform to current
period presentation.

NOTE 3: NEV Technologies

Minority Interest

In October 1998, The Mission Group ("Mission") entered into an agreement with
NEV to contribute $10 million to NEV Technologies in exchange for a future
equity interest in NEV Technologies. In accordance with the terms of the
agreement, Mission's contribution will convert to members' equity in NEV
Technologies on or prior to October 13, 2000. Upon conversion, Mission will
receive a percentage ownership in NEV Technologies equal to the greater of
13.33% or $10 million divided by the appraised value as of May 31, 2000.
Mission may elect to redeem $4 million of its contribution on the conversion
date. If Mission elects to redeem such amount, the $6 million remaining
investment would convert on a pro-rata basis in accordance with the above
referenced conversion formula. Upon conversion, NEV Technologies' capital
accounts will be adjusted so that the members' capital account balances are
in proportion to their respective percentage interests immediately following
the conversion.

Prior to conversion, Mission is entitled to receive distributions and
allocations of taxable income or loss, but has no voting rights. Mission was
also provided with certain limited protective rights which require its
consent to, among other things, liquidation and other matters related to NEV
Technologies, under certain conditions.

NEV recorded Mission's investment as minority interest, net of related costs.
Prior to the conversion date, net income and losses attributable to NEV
Technologies are allocated to Mission based on the terms for liquidation
distributions, as provided in the agreement.

Distribution Agreements

NEV Technologies has entered into distribution agreements for the exclusive
right to distribute and service AlliedSignal distributed generation
technology in the fourteen states comprising the Western United States and
certain countries outside the United States, including Hong Kong, Taiwan,
Vietnam, the Philippines and Singapore (together, the "Distribution
Agreements"). During 1998 and 1997, NEV made payments of $2.5 million and
$1.5 million, respectively, to obtain and maintain its exclusive rights.
These payments have been capitalized as Other assets and will be amortized on
a straight-line basis over the contract term of ten years from the date of
first delivery of a basic unit.

In order to maintain its exclusive rights over the contract terms, NEV will
be required to make additional payments under the Distribution Agreements as
follows:

     -  $2.5 million by March 31, 1999;
     -  $1 million upon satisfaction of certain performance standards, in no
event prior to June 30, 1999;
     -  $4 million upon delivery of a basic unit which meets certain
specified pricing levels which are required to be satisfied by January 1,
2003.

NEV Technologies must also purchase minimum quantities of the product at
specified prices from 1999 through 2009. Failure to meet these quotas may
result in a reduction of the scope of NEV's exclusive distribution
territories.

Management anticipates delivery of a prototype and production unit during the
second quarter of 1999. If AlliedSignal fails to meet its contractual
delivery obligations, NEV Technologies has certain liquidated damages
provisions under the Distribution Agreements.

Joint Ventures

In June 1998, NEV Technologies and Dames & Moore Ventures, Inc. ("Dames &
Moore") established NEVTech Americas and NEVTech Pacifica to provide on-site
electric generation capabilities and services in specified South American and
South Pacific countries. These equally-owned joint ventures are development
stage enterprises which have entered into agreements for the exclusive right
to market and distribute AlliedSignal distributed generation technology in
these markets. NEV's basis in these joint ventures is currently zero.

NEV Technologies also serves as the manager of the joint ventures and is
entitled to reimbursement of out-of-pocket expenses and certain promotional
costs and expenses. During the year ended December 31, 1998, the joint
ventures collectively reimbursed NEV approximately $628,000 for direct and
other costs in accordance with the operating agreements. The joint ventures
had no other operating expenses or revenues during the year ended December
31, 1998.

During 1998, NEVTech Americas and NEVTech Pacifica made payments of $800,000
and $200,000, respectively, to AlliedSignal to maintain the exclusive
distribution agreements. NEVTech Americas will be required to make an
additional payment of $500,000 after delivery of 150 units to Brazil; this
payment will be due no earlier than December 31, 1999.

During 1998, Dames & Moore made capital contributions totaling $5,000,000 to
the joint ventures. No other capital contributions are currently required for
the joint ventures.

NOTE 4: Properties and Equipment

Properties and equipment consist of the following:

                                               As of December 31,
                                          ----------------------------
                                               1998          1997
     -----------------------------------------------------------------
     Computer hardware and software        $  1,684,000   $    483,000
     Leasehold improvements                     154,000         91,000
     Furniture and fixtures                     131,000        126,000
     Office and general equipment                98,000         67,000
                                          -------------  -------------

                                              2,067,000        767,000
       Accumulated depreciation and
         amortization                          (377,000)      (137,000)
                                          -------------  -------------
                                           $  1,690,000   $    630,000
                                          =============  =============

NOTE 5: Notes to Stockholder and Long-term Debt

Notes to stockholder and Long-term debt consists of the following:

                                               As of December 31,
                         Interest Rate at  -------------------------
                         December 31, 1998      1998          1997
     ----------------------------------------------------------------
     Bridge Loan              10.41%        $10,000,000   $         -
     Notes to stockholder
       Due December 1999          -                   -     1,000,000
       Due June 2000           9.44%         15,000,000             -
       Due August 2000         7.94%         19,000,000             -
       Due August 2003         8.00%          4,768,000             -
       Due August 2006            -                   -     3,000,000
                                            -----------   -----------
         Total principal amount              48,768,000     4,000,000
         Unamortized discount                (1,963,000)            -
                                            -----------   -----------
                                            $46,805,000   $ 4,000,000
                                            ===========   ===========

Bridge Loan

On August 8, 1998, NEV obtained a Bridge Loan from Energy Funding, Inc.
("Energy Funding"), an affiliate of DLJ, with a maximum funding commitment of
$10 million. Under the terms of the Bridge Loan agreement, as amended,
borrowings bear interest at LIBOR plus 5%, payable every 90 days. NEV paid
$200,000 in commitment and takedown fees during 1998. In addition, the
amended agreement requires a commitment fee payable monthly of .5%, based on
the outstanding principal amount at the first business day of each month.
Borrowings under the Bridge Loan agreement may be redeemed on 10 days notice,
at any time, at par plus accrued interest to the redemption date. The
redemption price (whether early or at maturity) will be 103% of par plus
accrued interest if the notes are not redeemed with funds raised through a
transaction led by DLJ. The Bridge Loan contains certain financial covenants
that restrict the sale of assets, the incurrence of additional indebtedness
and certain investments and acquisitions.

In connection with the consummation of the funding agreement, UniSource
Energy issued an irrevocable guarantee to Energy Funding, providing the
prompt payment and performance of all obligations of NEV under the Bridge
Loan agreement. In accordance with a separate agreement between UniSource
Energy and NEV, if UniSource Energy is required to make payment under its
guarantee, NEV will not be required to reimburse UniSource Energy until June
1, 2000. Any amounts owed to UniSource Energy as a result of this guarantee
will bear interest at LIBOR plus 7%.

Borrowings under the Bridge Loan agreement, as amended, must be repaid at
maturity on March 31, 1999. As of March 1, 1999, the maturity date was
extended to April 30, 1999. NEV has recorded the Bridge Loan as a long-term
liability as it intends to either use loan proceeds or to call upon the
UniSource Energy guarantee for repayment on the maturity date.

Notes to Stockholder

On December 27, 1997, MEH agreed to provide a one-year irrevocable Credit
Facility (the "Facility") to NEV with an aggregate funding commitment of $20
million, including up to $10 million in loans and $10 million in preference
or additional equity. During the period through September 1, 1998, NEV
obtained $10 million in loans, bearing interest at LIBOR plus 2.5% and
maturing on December 31, 1999, under the Facility. NEV also obtained $9
million in preference equity. The preference equity required a 5% per annum
priority distribution and included a repurchase option for an amount which
provided MEH with a 25% annualized return. On September 1, 1998, the
borrowings and preference equity obtained under the Facility were exchanged
for a stockholder note bearing interest at LIBOR plus 2.5% per annum,
maturing at the earlier of August 31, 2000 or the closing of the sale of debt
securities with net cash proceeds to NEV of at least $60 million. The note
permits borrowings of up to $20 million in aggregate and may be prepaid at
any time without penalty.

Also on September 1, 1998, NEV converted a preference return entitlement of
$1,768,000, bearing interest at 10% per annum, and a $3,000,000 note due
August 31, 2006 bearing interest at 8% per annum to a $4,768,000 stockholder
note due August 31, 2003, bearing interest at 8% per annum. The stockholder
note may be prepaid at any time without penalty. Interest outstanding at the
date of conversion related to the preference return was forgiven. The equity
exchange was recorded as a treasury stock transaction and the difference in
the fair value of the obligations exchanged of $552,000 was recorded as an
equity contribution which will be amortized over the term of the related
notes.

On December 14, 1998, MEH provided a convertible credit facility (the
"Convertible Facility") to NEV in the amount of $30 million. In accordance
with the terms of the Convertible Facility, as amended, the facility is
subject to the availability and assignment of assets from NEV to
collateralize amounts outstanding (see Note 9). Interest accrues at a rate of
LIBOR plus 4 1/2% and will be reset every 90 days following the date of a
drawdown. The facility matures on June 1, 2000 at which time interest and
principal outstanding are due. Borrowings outstanding under the convertible
credit facility may be prepaid at any time without penalty.

At any time after April 1, 1999, MEH may elect to convert up to 5% of the
outstanding principal balance into an amount of NEV common stock not
exceeding 5% of the total NEV stock issued and outstanding following the
conversion. The conversion price will be based on the fair market value of
NEV at the time of conversion, less a discount in the amount of $114,609 for
each $1 million of outstanding principal balance under the credit facility.
The outstanding value of the beneficial conversion feature is recorded as
paid-in-capital and is being amortized as interest expense over the vesting
period. At December 31, 1998, amounts advanced under the credit facility
totaled $15,000,000 of which $13,281,000 was recorded as long-term debt and
$1,719,000 as paid-in-capital.

During the years ended December 31, 1998 and 1997, NEV incurred interest
expense of $1.3 million and $80,000, respectively, related to its notes to
stockholder. At December 31, 1998 and 1997, accrued interest of $1.2 million
and $80,000, respectively, related to the notes to stockholder was included
in Long-term liabilities.

Fair Value

The fair value of Notes to stockholder and Long-term debt was $48.1 million
and $3.7 million at December 31, 1998 and 1997, respectively. Management has
estimated fair value based on the present value of interest and principal
payments on the long-term debt, discounted using current interest rates
obtainable by NEV for debt of similar quality and maturities.

NOTE 6: Stock and Incentive Programs for Management

NEV entered into agreements with executive management to provide restricted
stock awards in New Energy Holdings, Inc. ("NEH"), a 50% shareholder in NEV.
Certain of these awards are contingent upon employment at specified vesting
dates through 2000. NEH and the other shareholders have the right to
repurchase the stock at fair value upon termination of employment. In
addition, shares may not be sold or transferred without providing the
opportunity to NEH and the other shareholders to repurchase the shares. Under
limited circumstances, certain of the awards provide that any nonvested
shares will vest immediately upon change in control of NEV.

Information with respect to stock awards is as follows (amounts represent
percentage ownership in NEH):

     Stock awards                 Outstanding     Vested
     ---------------------------------------------------
     At January 1, 1997                 5.00%      2.50%
        Additions                      11.50%      3.50%
                                       ------     ------
     At December 31, 1997              16.50%      6.00%
        Additions                       8.00%      9.67%
                                       ------     ------
     At December 31, 1998              24.50%     15.67%
                                       ======     ======

Compensation expense of $1.2 million and $401,000 related to these awards was
recognized during the years ended December 31, 1998 and 1997, respectively.
The fair value of awards granted during the years ended December 31, 1998 and
1997 was approximately $1.2 million and $775,000, respectively.

Phantom Stock Awards

During the year ended December 31, 1998, certain of NEV's subsidiaries
established separate performance incentive plans (together, the "Incentive
Plans"). Under the terms of the Incentive Plans, officers and employees of
the specified subsidiary or affiliated companies may be granted performance
units which represent the right to receive payment for appreciation of the
fair value of the subsidiary as determined by a defined formula based on net
income. Payments under the plans will be made after a trigger date which may
be (a) a fixed date set forth in the award agreement; (b) the participant's
termination of employment; (c) the termination of the plan by the subsidiary;
or (d) a change in control as defined in the agreements (unless the managing
committee provides otherwise).

Certain of these awards are contingent upon employment at specified vesting
dates through 2002. All nonvested awards will vest immediately upon a change
of control.

Performance units awarded during the year ended December 31, 1998 were as
follows:

                                  Units       Units      Units
                               Authorized    Awarded     Vested
     ----------------------------------------------------------
     NEV East, L.L.C.            200,000     120,000     90,000
     NEV California, L.L.C.      200,000      30,000     20,000
     NEV Technologies, L.L.C.    200,000     120,000     25,000
     NEV Midwest, L.L.C.         200,000     100,000          -

The Incentive Plans follow variable plan accounting with recognition of
changes in fair value, as defined, recorded currently in income. No
compensation expense related to these awards was recognized during 1998 or
1997.

Stock Options

In October 1998, NEV established a stock option plan which provides for the
granting of incentive stock options or non-qualified stock options to
specified officers and key employees. The plan also provides for issuance of
restricted stock awards, stock appreciation rights and performance awards.
The plan is administered by the Board of Directors. No option can be for a
term of more than ten years from the date of grant. The purchase price of
options will be determined by the Board, but cannot be less than 100% and 85%
of the fair market value of the common stock on the date that incentive stock
options or non-qualified stock options are granted, respectively. Unless
otherwise determined, options granted under the plan will be exercisable
ratably over five years. As of December 31, 1998, 1.1 million shares are
reserved for issuance under this plan and NEV was authorized to grant 390,000
shares at an exercise price of $10 per share. No awards were made during
1998.

During 1999, an additional 500,000 options were authorized for issuance and
NEV issued 400,000 options at an exercise price of $10 per share under the
plan.

NOTE 7: Income Taxes

Upon conversion from a limited liability company ("LLC") to a corporation on
October 9, 1998, NEV adopted Statement of Financial Accounting Standards No.
109, Accounting for Income Taxes. This statement requires that deferred
income tax assets and liabilities be recorded to reflect the tax consequences
on future years of temporary differences of revenue and expense items for
financial statement and income tax purposes. Valuation allowances are
provided against assets that are not likely to be realized. Prior to October
1998, net income and losses were distributed to members of the LLC.

NEV did not recognize a provision or benefit for income taxes during 1998. A
reconciliation of the statutory federal income tax rate and the effective tax
rate for the period from October 9, 1998 through December 31, 1998 follows:

     Statutory federal income tax rate                         35.0%
     State and local taxes net of federal income tax            5.0%
     Change in valuation allowance                            -40.0%
                                                              ------
                                                                0.0%
                                                              ======

The tax effects of temporary differences that give rise to significant
portions of the deferred tax assets at December 31, 1998 and October 9, 1998
are as follows:

                                               As of December   As of October
                                                   31, 1998         9, 1998
                                                 -----------     -----------

   Deferred tax asset
     Deferred purchased power expense            $ 7,159,000     $ 5,997,000
     Unrealized losses on adverse commitments      2,590,000       3,585,000
     Other assets                                    748,000         286,000
                                                 -----------     -----------
                                                  10,497,000       9,868,000
     Less: valuation allowance                   (10,497,000)     (9,868,000)
                                                 -----------     -----------
     Net deferred tax                            $         -     $         -
                                                 ===========     ===========

A valuation allowance has been established due to the uncertainty of
realizing tax loss carryforwards and other deferred tax assets.

NOTE 8: Wholesale Energy Supply and Risk Management

NEV enters into forward purchase commitments involving the physical delivery
of energy to serve its retail customer load. In addition, NEV enters into
physical commodity contracts and derivative instruments, including swaps,
options and financial contracts, to provide savings to its retail customers
and for proprietary purposes.

Market Risk

NEV is exposed to price risk in the markets in which it conducts electricity
purchases and sales. Market risk arises from the potential change in the
value of financial instruments and physical commodities based on fluctuations
in electricity commodity exchange prices and bases. Market risk is also
affected by changes in volatility and liquidity in markets in which these
instruments are traded. NEV manages its wholesale risk exposure by balancing
commodity purchases through a combination of long-term and short-term (spot
market) agreements. NEV also will at times create a net open position to take
advantage of anticipated market opportunities.

NEV has further established trading policies and limits designed to manage
NEV's exposure to price risk. The Company periodically reviews its exposures
against the stipulated limits. NEV also continually reviews its policies to
ensure that they are responsive to changing market conditions. NEV measures
its exposure to market risk by comparing its open positions to a market
estimate of fair value. The market prices used to determine fair value are
based on management's best estimates, which consider various factors
including broker quotes, exchange, over the counter prices and time value.

Credit Risk

NEV is exposed to credit risk related to potential nonperformance by its
wholesale counterparties under the terms of contractual agreements. During
1998 and 1997, wholesale sales to trading counterparties, including utility
companies and energy marketers, totaled amounts equal to approximately 38%
and 92%, respectively, of NEV's combined wholesale and retail revenue. During
1997, sales contracts with Noram Energy Services and Conagra Energy Services,
Inc. equaled 41% and 40%, respectively, of total revenue.

Management manages the risk of counterparty default by performing financial
credit reviews of its counterparties and through the use of standardized
agreements which allow for the netting of positive and negative exposures
associated with a single counterparty. In addition, NEV may require
collateral to support trading positions from certain counterparties. NEV does
not anticipate any nonperformance by any of its counterparties and has no
reserves related to nonperformance as of December 31, 1998. NEV did not
experience any material counterparty default during 1998 or 1997.

Retail sales also potentially expose NEV to concentrations of credit risk. As
of and for the year ended December 31, 1998, customers located in California
and New York City accounted for approximately 80% and 10%, respectively, of
NEV's accounts receivable and 89% and 9%, respectively, of NEV's retail
revenue. NEV performs ongoing credit evaluations of its customers' financial
condition and reserves the right to require collateral under its retail
contracts. NEV's customer base in California and New York City consists
primarily of large retailers, manufacturers and government agencies and
management does not believe that this concentration of sales and credit risk
represents a material risk of loss with respect to its financial position as
of December 31, 1998. During the year ended December 31, 1998, Ralphs Grocery
Company accounted for 17% of total revenue.

Forward Commitments

A summary of NEV's open forward commitments is as follows:

                           Purchases                  Sales
                     -----------------------------------------------
                       MWhs        Amount       MWhs       Amount
                     -----------------------------------------------
     Year Ending
     December 31,
        1999         4,024,000  $ 81,952,000  2,093,000  $45,681,000
        2000         3,514,000  $ 79,860,000  1,064,000  $24,530,000
        2001         4,165,000  $110,869,000  1,351,000  $32,964,000
        2002         3,281,000  $ 92,852,000    839,000  $21,118,000
        2003         1,752,000  $ 51,283,000          -  $         -

Certain of NEV's energy purchase commitments provide changing prices over the
contract terms. For financial reporting purposes, all energy received under
these contracts is recorded in the income statement as cost of sales or
proprietary purchases and sales, net at the average contract price;
differences between the average price and amounts paid currently under the
contracts are recorded in the balance sheet as Deferred purchase power
obligation. During the year ended December 31, 1998, NEV recorded deferred
purchased power costs of $12.7 million, of which $8.1 million and $4.6
million were included in retail Cost of sales and Proprietary purchases and
sales, net, respectively. During 1997, NEV deferred $5.3 million under these
contracts.

During 1998 and 1997, wholesale purchases were concentrated with a few large
suppliers; however, NEV has purchase relationships with numerous
counterparties and management does not believe that NEV is dependent on any
single supplier.

Retail Sales Commitments

As of December 31, 1998, NEV had entered into a limited number of retail
contracts requiring a certain minimum level of savings below the exchange or
current tariff rate. In addition, NEV entered into one below market fixed
price retail contract. As a result, NEV recorded net losses for adverse
commitments aggregating $10.6 million during the year ended December 31,
1998, reflecting management's belief that these contracts are priced below
current market rates. Management estimated this amount based on current and
anticipated market conditions and historical customer consumption;
differences between these assumptions and actual prices and usage will impact
actual losses recorded related to these contracts, which will generally occur
over the next two years.

NOTE 9: Commitments and Contingencies

UDC Guarantee and Reimbursement Agreements

As of August 24, 1998, DLJ issued guarantees to the California UDCs related
to NEV California's obligations to the UDCs arising from distribution and
transmission services provided in the California retail business. DLJ's
aggregate commitment under these guarantees is $61.3 million, of which $36.7
million was outstanding as of December 31, 1998.

NEV and DLJ entered into a reimbursement agreement related to the guarantees.
Pursuant to the terms of the reimbursement agreement, NEV is required to pay
a monthly fee of .125% of the exposure amount during the immediately
proceeding month under the outstanding UDC guarantees. In addition, amounts
advanced by DLJ under the guarantees will bear interest at an annual rate of
LIBOR plus 4.0% and will be subject to a takedown fee of 1.0%. No amounts
were advanced by DLJ under the guarantees during the year ended December 31,
1998. The reimbursement agreement includes certain financial covenants that
restrict the sale of assets, the incurrence of certain additional
indebtedness and certain investments and acquisitions. On March 23, 1999, the
UDC credit facility termination date was extended to the earlier of the
closing of a private placement offering or June 30, 1999. Management is
currently evaluating alternative sources of credit support.

Pledged Assets

NEV has assigned California retail accounts receivable to DLJ as collateral
to support the UDC guarantees. In addition, NEV has further assigned certain
assets to UniSource Energy and MEH as collateral for credit support and
stockholder notes. UniSource Energy provided credit support to NEV in the
form of guarantees and surety bonds to support NEV's wholesale and retail
electricity purchases and sales activities. As of December 31, 1998,
UniSource Energy had extended guarantees and surety bonds aggregating $39.6
million, of which $14.4 million was outstanding. In addition, UniSource
Energy has guaranteed repayment of the Bridge Loan.

As of December 31, 1998, assets pledged or assigned to support the guarantees
and notes include Restricted cash and Accounts receivable of $25.4 million
and $72.6 million, respectively. DLJ has a first priority interest in the
restricted cash and California retail accounts receivable balances. MEH and
UniSource Energy have a first priority interest in wholesale and non-
California retail accounts receivable and a second priority interest in the
energy portion of California retail accounts receivable.

NEV also assigned to UniSource Energy two years of its rights to receive
power from certain purchase power contracts under which it is entitled to
receive firm power of approximately 400 MW.

Service Agreement

NEV entered into an agreement with LG&E Power Marketing Inc. ("LG&E") to
obtain scheduling, metering and billing services through December 31, 2001.
In exchange for these services, NEV pays LG&E a declining fee ranging from
$0.40 - $0.14 per MWh, depending on the aggregate quantity of MWhs delivered
by NEV. The base rate will be adjusted annually based on changes in the
Consumers Price Index. Minimum fees required under this contract are as
follows: $262,000, $273,000 and $285,000 for each of the calendar years 1999,
2000 and 2001, respectively. During the year ended December 31, 1998, NEV
paid LG&E servicing fees of $1 million. Currently, MEH and UniSource Energy
have guaranteed any amounts owed by NEV up to $9.1 million for the term of
the Agreement. This contract may be terminated by either party without cause,
with one year written notice which may be given at any time after July 1,
1999.

Lease Commitments

NEV has commitments under non-cancelable long-term leases, primarily for
office space and equipment. At December 31, 1998, the future minimum lease
payments under operating leases are as follows:

     Year Ending December 31,
     -------------------------------------------------------
              1999                               $1,060,000
              2000                                  852,000
              2001                                  747,000
              2002                                  597,000
              2003                                   37,000
                                                -----------
                                                 $3,293,000
                                                ===========

Rental expense amounted to $863,000 and $324,000 during 1998 and 1997,
respectively.

Settlement Agreement

In November 1998, NEV entered into a settlement agreement with a service
provider relating to disputes with respect to services received under related
agreements. The settlement provided NEV with a $4 million initial payment and
the right to receive two additional payments of $1 million in each of the two
years following the date of settlement. These additional payments are subject
to conditions which restrict similar claims during the settlement period. NEV
recorded the initial payment as Gain from settlement and will recognize
remaining payments due under the settlement in the period received.

NEV is party to legal actions and other claims with respect to matters
arising in the ordinary course of business. While the final outcome of these
matters cannot be predicted with certainty, it is the opinion of management
that any ultimate liability which may arise from these claims will not
materially affect NEV's consolidated financial position or results of
operations.



<PAGE>

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING 
- -----------------------------------------------------------------------
AND FINANCIAL DISCLOSURE
- ------------------------

     Not applicable.



                                 PART III


ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANTS 
- -------------------------------------------------------------------------
     
     DIRECTORS
     ---------

     Certain of the individuals serving as Directors of UniSource
Energy also serve as the Directors of TEP.  Information concerning
Directors is contained under Election of Directors in the Company's
Proxy Statement relating to the 1999 Annual Meeting of Shareholders, 
which information is incorporated herein by reference.

     EXECUTIVE OFFICERS
     ------------------

     Executive Officers of UniSource Energy who are elected annually 
by the Company's Board of Directors, are as follows:

                                                          Executive   
Name                  Age   Title                      Officer Since
- ----                  ---   -----                      -------------

James S. Pignatelli   55    Chairman, President and         1994
                            Chief Executive Officer (a)

Ira R. Adler          48    Executive Vice President,       1988
                            Chief Financial Officer and
                            Treasurer (b)

Dennis R. Nelson      48    Vice President, General         1991
                            Counsel and Corporate
                            Secretary (c)

Karen G. Kissinger    44    Vice President, Controller      1991
                            and Principal Accounting
                            Officer (d)

Michael J. DeConcini  34    Vice President - Strategic      1999
                            Planning (e)


          
     Executive Officers of TEP who are elected annually by TEP's Board 
of Directors, are:

                                                           Executive
Name                  Age  Title                         Officer Since 
- ----                  ---  -----                         -------------
                               
James S. Pignatelli   55   Chairman, President and Chief     1994
                           Executive Officer (a)

Ira R. Adler          48   Executive Vice President and      1988
                           Chief Financial Officer, 
                           Chief Operating Officer, 
                           Generation (b)

Dennis R. Nelson      48   Senior Vice President and         1991 
                           General Counsel (c)
 
Thomas A. Delawder    52   Vice President - Energy           1985
                           Resources (f)

Gary L. Ellerd        48   Vice President -                  1985
                           Transmission (g)

Steven J. Glaser      41   Vice President - Rates and 
                           Regulatory Support, and Utility   1994
                           Distribution Company Energy 
                           Services (h)

Thomas Hansen         48   Vice President - Technical        1992
                           Advisor (i)

Karen G. Kissinger    44   Vice President, Controller and    1991
                           Chief Information Officer (d)

Kevin P. Larson       42   Vice President and Treasurer (j)  1994

Vincent Nitido        43   Vice President and Assistant      1998  
                           General Counsel (k)

James Pyers           56   Vice President - Engineering      1998
                           Operations (l)


(a)  James S. Pignatelli:  Mr. Pignatelli joined TEP as Senior Vice
President in August 1994 and was elected Senior Vice President and
Chief Operating Officer in 1996.  He was named Senior Vice President 
and Chief Operating Officer of UniSource Energy in January 1998, and 
Executive Vice President and Chief Operating Officer of TEP in March 
1998.  On June 23, 1998, Mr. Pignatelli was named Chairman, President 
and CEO of UniSource Energy and TEP.  Prior to joining TEP, he was 
President and Chief Executive Officer from 1988 to 1993 of Mission 
Energy Company, a subsidiary of SCE Corp.

(b)  Ira R. Adler:  Mr. Adler joined TEP in 1986 as Manager of Financial 
Planning.  In 1987 he was elected as Vice President and Treasurer of 
TRI, one of TEP's investment subsidiaries, from which position he 
resigned in October 1988, when he was elected Treasurer of TEP.  He 
was elected Vice President - Finance and Treasurer in July 1989 and 
was elected Senior Vice President and Chief Financial Officer in July 
1990 and President of TRI and SRI in April 1992.  He was named Senior 
Vice President, Chief Financial Officer and Treasurer of UniSource 
Energy in January 1998.  Mr. Adler was named Executive Vice President 
of TEP in March 1998 and Executive Vice President of UniSource Energy 
in June 1998.  In November 1998, Mr. Adler also became Chief Operating 
Officer _ Generation.  Prior to joining TEP, he was Vice President - 
Finance of US WEST Financial Services, Inc.

(c)  Dennis R. Nelson:  Mr. Nelson joined TEP as a staff attorney in 1976. 
He was manager of the Legal Department from 1985 to 1990.  He was elected 
Vice President, General Counsel and Corporate Secretary in January 1991. 
He was named Vice President, General Counsel and Corporate Secretary of 
UniSource Energy in January 1998.  Mr. Nelson was named Senior Vice 
President and General Counsel of TEP in November 1998.

(d)  Karen G. Kissinger:  Ms. Kissinger joined TEP as Vice President and 
Controller in January 1991.  She was named Vice President, Controller and 
Principal Accounting Officer of UniSource Energy in January 1998.  In 
November 1998, Ms. Kissinger was also named Chief Information Officer of 
TEP.  Prior to joining TEP, she was a Manager with Deloitte & Touche from 
1986 through 1989 and a Senior Manager through 1990.

(e)  Michael J. DeConcini:  Mr. DeConcini joined TEP in 1988 and served 
in various positions in finance, strategic planning and wholesale 
marketing.  He was Manager of TEP's Wholesale Marketing Department in 
1994, adding Product Development and Business Development in 1997.  In 
November 1998, he was elected Vice President of MEH, and elected Vice 
President - Strategic Planning of UniSource Energy in February 1999.

(f)  Thomas A. Delawder:  Mr. Delawder joined TEP in 1974 and thereafter 
served in various engineering and operations positions.  In April 1985 
he was named Manager, Systems Operations and was elected Vice President -
Power Supply and System Control in November 1985.  In February 1991, 
he became Vice President - Engineering and Power Supply and in January 
1992 he became Vice President - System Operations.  In 1994, he became 
Vice President - Energy Resources.

(g)  Gary L. Ellerd:  Mr. Ellerd joined TEP as Vice President and 
Controller in January 1985.  He was elected Vice President - Services and 
Chief Information Officer in January 1991 and in January 1992 he became
Vice President - Corporate Information Services and Chief Information 
Officer.  In 1994, he was named Vice President - Retail Customers.  In 
1995, he was named Vice President - Operations.  Mr. Ellerd became Vice 
President - Transmission in November 1998.

(h)  Steven J. Glaser:  Mr. Glaser joined TEP in 1990 as a Senior
Attorney in charge of Regulatory Affairs.  He was Manager of TEP's Legal 
department from 1992 to 1994, and Manager of Contracts and Wholesale 
Marketing from 1994 until elected Vice President - Business Development.  
In 1995, he was named Vice President - Wholesale/Retail Pricing and 
System Planning.  He was named Vice President - Energy Services in 1996 
and Vice President - Rates and Regulatory Support and UDC Energy Services 
in November 1998.

(i)  Thomas Hansen:  Mr. Hansen joined TEP in December 1992 as Vice
President - Power Production.  Prior to Joining TEP, Mr. Hansen was
Century Power Corporation's Vice President - Operations from 1989 and 
Plant Manager at Springerville from 1987 through 1988.  In 1994, he was 
named Vice President - Technical Advisor.

(j)  Kevin P. Larson:  Mr. Larson joined TEP in 1985 and thereafter held 
various positions in its finance department and at TEP's investment 
subsidiaries.  In January 1991, he was elected Assistant Treasurer of 
TEP and named Manager of Financial Programs.  He was elected Treasurer 
of TEP in August 1994 and Vice President in March 1997.

(k)  Vincent Nitido:  Mr. Nitido joined TEP as a staff attorney in 1991. 
He was promoted to manager of the Legal Department in 1994, and elected 
Vice President and Assistant General Counsel in 1998.

(l)  James Pyers:  Mr. Pyers joined TEP in 1974 as a Supervisor.
Thereafter, he held various supervisory positions and was promoted to 
Manager of Customer in Service Operations in February 1998.  Mr. Pyers 
was elected Vice President - Utility Distribution Company Operations 
in November 1998.
          
Mr. George W. Miraben, Executive Vice President and Chief Operating
Officer, Utility Distribution Company, resigned from TEP in January 1999.



ITEM 11. EXECUTIVE COMPENSATION
- -------------------------------------------------------------------------

     Information concerning Executive Compensation is contained under 
Executive Compensation and Other Information in the Company's Proxy 
Statement relating to the 1999 Annual Meeting of Shareholders, which 
information is incorporated herein by reference.


ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
- ------------------------------------------------------------------------

  GENERAL
  -------

     At March 8, 1999, UniSource Energy had outstanding 32,290,859
shares of Common Stock.  As of March 8, 1999, the number of shares of 
Common Stock beneficially owned by all directors and officers of the 
Company as a group amounted to less than 1% of the outstanding Common 
Stock.

     At March 8, 1999, UniSource Energy owned all of the outstanding 
shares of common stock of TEP.

  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
  -----------------------------------------------

     Information concerning the security ownership of certain beneficial 
owners of UniSource Energy is contained under Security Ownership of 
Certain Beneficial Owners in the Company's Proxy Statement relating to 
the 1999 Annual Meeting of Shareholders, which information is 
incorporated herein by reference.

  SECURITY OWNERSHIP OF MANAGEMENT
  --------------------------------

     Information concerning the security ownership of the Directors
and Executive Officers of UniSource Energy and TEP is contained under 
Security Ownership of Management in the Company's Proxy Statement 
relating to the 1999 Annual Meeting of Shareholders, which information 
is incorporated herein by reference.


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
- ------------------------------------------------------------------------

     None.


<PAGE>



                                 PART IV


ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
- -------------------------------------------------------------------------

                                                             Page
                                                             ----
(a)  1.   Consolidated Financial Statements as of
          December 31, 1998 and 1997 and for Each
          of the Three Years in the Period Ended
          December 31, 1998.

          UniSource Energy Corporation
          ----------------------------
          Independent Auditors' Report                         46
          Report of Independent Accountants                    47
          Consolidated Statements of Income                    48
          Consolidated Statements of Cash Flows                49
          Consolidated Balance Sheets                          50
          Consolidated Statements of Capitalization            51
          Consolidated Statements of Changes in Stockholders'
            Equity                                             52
          Notes to Consolidated Financial Statements           58

          Tucson Electric Power Company
          -----------------------------
          Independent Auditors' Report                         46
          Report of Independent Accountants                    47
          Consolidated Statements of Income                    53
          Consolidated Statements of Cash Flows                54
          Consolidated Balance Sheets                          55
          Consolidated Statements of Capitalization            56
          Consolidated Statements of Changes in Stockholders'
            Equity                                             57
          Notes to Consolidated Financial Statements           58

     2.   Supplemental Consolidated Schedules for the Years
          Ended December 31, 1996 to 1998.

          Financial Statement Schedules
          -----------------------------
          New Energy Ventures, Inc.
          Report and Consolidated Financial Statements
          December 31, 1998 and 1997                           93

     Schedules I to V, inclusive, are omitted because they are not
     applicable or not required.

     3.   Exhibits.

     Reference is made to the Exhibit Index commencing on page 121

(b)  Reports on Form 8-K.

     UniSource Energy Corporation and Tucson Electric Power Company
     --------------------------------------------------------------
     --  Form 8-K dated November 25, 1998 (filed December 15,
         1998), reporting on TEP settlement agreement with the ACC
         Staff and the approval of the ACC retail electric competition
         rules.
     --  Form 8-K dated December 4, 1998 (filed December 8, 1998),
         reporting on dividend paid by TEP to UniSource Energy
     --  Form 8-K dated January 4, 1999 (filed January 8, 1999),
         reporting on the delay of retail electric competition in
         Arizona.
     --  Form 8-K dated February 5, 1999 (filed February 16, 1999),
         reporting on Proposed Orders by ACC Hearing Officer and 1998
         Earnings.

     UniSource Energy Corporation
     ----------------------------
     --  Form 8-K dated March 5, 1999 (filed March 15, 1999),
         reporting on adoption of a shareholder rights plan.


<PAGE>


                              SIGNATURES
                              ----------

     Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this 
report to be signed on its behalf by the undersigned thereunto duly 
authorized.

                                        UNISOURCE ENERGY CORPORATION

Date:  March 31, 1999                   By  Ira R. Adler
                                           ------------------------------
                                            Ira R. Adler
                                            Executive Vice President and
                                            Principal Financial Officer

     Pursuant to the requirements of the Securities Exchange Act of
1934, this report has been signed below by the following persons on
behalf of the registrant and in the capacities and on the dates
indicated.


Date:  March 31, 1999                       James S. Pignatelli*
                                        ---------------------------------
                                        James S. Pignatelli
                                        Chairman of the Board, President and
                                        Principal Executive Officer


Date:  March 31, 1999                       Ira R. Adler
                                        ---------------------------------
                                        Ira R. Adler
                                        Executive Vice President, Principal
                                        Financial Officer and Director


Date:  March 31, 1999                       Karen G. Kissinger*
                                        ---------------------------------
                                        Karen G. Kissinger
                                        Principal Accounting Officer


Date:  March 31, 1999                       Larry W. Bickle*
                                        ---------------------------------
                                        Larry W. Bickle
                                        Director


Date:  March 31, 1999                       Elizabeth T. Bilby*
                                        ---------------------------------
                                        Elizabeth T. Bilby
                                        Director


Date:  March 31, 1999                       Harold W. Burlingame*
                                        ---------------------------------
                                        Harold W. Burlingame
                                        Director


Date:  March 31, 1999                       Jose L. Canchola*
                                        ---------------------------------
                                        Jose L. Canchola
                                        Director


Date:  March 31, 1999                       John L. Carter*
                                        ---------------------------------
                                        John L. Carter
                                        Director


Date:  March 31, 1999                       Daniel W. L. Fessler*
                                        ---------------------------------
                                        Daniel W. L. Fessler
                                        Director


Date:  March 31, 1999                       John A. Jeter*
                                        ---------------------------------
                                        John A. Jeter
                                        Director


Date:  March 31, 1999                       R. B. O'Rielly*
                                        ---------------------------------
                                        R. B. O'Rielly
                                        Director


Date:  March 31, 1999                       Martha R. Seger*
                                        ---------------------------------
                                        Martha R. Seger
                                        Director


Date:  March 31, 1999                       H. Wilson Sundt*
                                        ---------------------------------
                                        H. Wilson Sundt
                                        Director


Date:  March 31, 1999                   By    Ira R. Adler
                                          -------------------------------
                                              Ira R. Adler
                                            as attorney-in-fact for each
                                            of the persons indicated

<PAGE>

                              SIGNATURES
                              ----------

     Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this 
report to be signed on its behalf by the undersigned thereunto duly 
authorized.

                                        TUCSON ELECTRIC POWER COMPANY


Date:  March 31, 1999                    By   Ira R. Adler
                                           ------------------------------
                                              Ira R. Adler
                                              Executive Vice President and
                                              Principal Financial Officer


     Pursuant to the requirements of the Securities Exchange Act of
1934, this report has been signed below by the following persons on
behalf of the registrant and in the capacities and on the dates
indicated.


Date:  March 31, 1999                       James S. Pignatelli* 
                                        ---------------------------------
                                        James S. Pignatelli
                                        Chairman of the Board, President and
                                        Principal Executive Officer


Date:  March 31, 1999                       Ira R. Adler
                                        ---------------------------------
                                        Ira R. Adler
                                        Executive Vice President, Principal
                                        Financial Officer and Director


Date:  March 31, 1999                       Karen G. Kissinger* 
                                        ---------------------------------
                                        Karen G. Kissinger
                                        Principal Accounting Officer


Date:  March 31, 1999                       Elizabeth T. Bilby* 
                                        ---------------------------------
                                        Elizabeth T. Bilby
                                        Director


Date:  March 31, 1999                       Harold W. Burlingame* 
                                        ---------------------------------
                                        Harold W. Burlingame
                                        Director


Date:  March 31, 1999                       John. L. Carter* 
                                        ---------------------------------
                                        John L. Carter
                                        Director


Date:  March 31, 1999                       Daniel W. L. Fessler*  
                                        ---------------------------------       
                                        Daniel W. L. Fessler
                                        Director


Date:  March 31, 1999                       John A. Jeter*  
                                        ---------------------------------
                                        John A. Jeter
                                        Director


Date:  March 31, 1999                       Martha R. Seger* 
                                        ---------------------------------
                                        Martha R. Seger
                                        Director


Date:  March 31, 1999     
                                        By       Ira R. Adler 
                                           ------------------------------
                                              Ira R. Adler
                                              as attorney-in-fact for each
                                              of the persons indicated


<PAGE>


                                     EXHIBIT INDEX

	      *2(a) -- Agreement and Plan of Exchange, dated as of March 20,
                   1995, between TEP, UniSource Energy and NCR Holding, Inc.
          
		  *3(a) -- Restated Articles of Incorporation of TEP, filed with the
                   ACC on August 11, 1994, as amended by Amendment to Article
                   Fourth of the Company's Restated Articles of
                   Incorporation, filed with the ACC on May 17, 1996.  (Form
                   10-K for year ended December 31, 1996, File No. 1-5924--
                   Exhibit 3(a).)

          *3(b) -- Bylaws of TEP, as amended May 20, 1994.  (Form 10-Q for
                   the quarter ended June 30, 1994, File No. 1-5924--Exhibit
                   3.)

          *3(c) -- Amended and Restated Articles of Incorporation of
                   UniSource Energy.  (Form 8-A/A, dated January 30, 1998,
                   File No. 1-13739--Exhibit 2(a).)

          *3(d) -- Bylaws of UniSource Energy, as amended December 11, 1997.
                   (Form 8-A, dated December 23, 1997, File No. 1-13739--
                   Exhibit 2(b).)

          *4(a)(1)-- Indenture dated as of April 1, 1941, to The Chase
                   National Bank of the City of New York, as Trustee.  (Form
                   S-7, File No. 2-59906--Exhibit 2(b)(1).)

          *4(a)(2)-- First Supplemental Indenture, dated as of October 1,
                   1946.  (Form S-7, File No. 2-59906--Exhibit 2(b)(2).)

          *4(a)(3)-- Second Supplemental Indenture dated as of October 1,
                   1947.  (Form S-7, File No. 2-59906--Exhibit 2(b)(3).)

          *4(a)(4)-- Third Supplemental Indenture, dated as of April 1, 1949.
                   (Form S-7, File No. 2-59906--Exhibit 2(b)(4).)

          *4(a)(5)-- Fourth Supplemental Indenture, dated as of December 1,
                   1952.  (Form S-7, File No. 2-59906--Exhibit 2(b)(5).)

          *4(a)(6)-- Fifth Supplemental Indenture, dated as of January 1,
                   1955.  (Form S-7, File No. 2-59906--Exhibit 2(b)(6).)

          *4(a)(7)-- Sixth Supplemental Indenture, dated as of January 1,
                   1958.  (Form S-7, File No. 2-59906--Exhibit 2(b)(7).)

          *4(a)(8)-- Seventh Supplemental Indenture, dated as of November 1,
                   1959.  (Form S-7, File No. 2-59906--Exhibit 2(b)(8).)

          *4(a)(9)-- Eighth Supplemental Indenture, dated as of November 1,
                   1961.  (Form S-7, File No. 2-59906--Exhibit 2(b)(9).)

          *4(a)(10)-- Ninth Supplemental Indenture, dated as of February
                   20, 1964.  (Form S-7, File No. 2-59906--Exhibit 2(b)(10).)
          
          *4(a)(11)-- Tenth Supplemental Indenture, dated as of February
                   1, 1965.  (Form S-7, File No. 2-59906--Exhibit 2(b)(11).)
                                    
          *4(a)(12)-- Eleventh Supplemental Indenture, dated as of
                   February 1, 1966.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(12).

          *4(a)(13)-- Twelfth Supplemental Indenture, dated as of
                   November 1, 1969.  (Form S-7, File No. 2-59906 Exhibit
                   2(b)(13).)


                               EXHIBIT INDEX (CONTINUED)

          *4(a)(14)-- Thirteenth Supplemental Indenture, dated as of
                   January 20, 1970.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(14).)

          *4(a)(15)-- Fourteenth Supplemental Indenture, dated as of
                   September 1, 1971.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(15).)

          *4(a)(16)-- Fifteenth Supplemental Indenture, dated as of March
                   1, 1972.  (Form S-7, File No. 2-59906--Exhibit 2(b)(16).)
          
          *4(a)(17)-- Sixteenth Supplemental Indenture, dated as of May
                   1, 1973.  (Form S-7, File No. 2-59906--Exhibit 2(b)(17).)
          
          *4(a)(18)-- Seventeenth Supplemental Indenture, dated as of
                   November 1, 1975.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(18).)

          *4(a)(19)-- Eighteenth Supplemental Indenture, dated as of
                   November 1, 1975.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(19).)

          *4(a)(20)-- Nineteenth Supplemental Indenture, dated as of July
                   1, 1976.  (Form S-7, File No. 2-59906--Exhibit 2(b)(20).)
          
          *4(a)(21)-- Twentieth Supplemental Indenture, dated as of
                   October 1, 1977.  (Form S-7, File No. 2-59906--Exhibit
                   2(b)(21).)

          *4(a)(22)-- Twenty-first Supplemental Indenture, dated as of
                   November 1, 1977.  (Form 10-K for year ended December 31,
                   1980, File No. 1-5924--Exhibit 4(v).)

          *4(a)(23)-- Twenty-second Supplemental Indenture, dated as of
                   January 1, 1978.  (Form 10-K for year ended December 31,
                   1980, File No. 1-5924--Exhibit 4(w).)

          *4(a)(24)-- Twenty-third Supplemental Indenture, dated as of
                   July 1, 1980.  (Form 10-K for year ended December 31,
                   1980, File No. 1-5924--Exhibit 4(x).)

          *4(a)(25)-- Twenty-fourth Supplemental Indenture, dated as of
                   October 1, 1980.  (Form 10-K for year ended December 31,
                   1980, File No. 1-5924--Exhibit 4(y).)

          *4(a)(26)-- Twenty-fifth Supplemental Indenture, dated as of
                   April 1, 1981.  (Form 10-Q for quarter ended March 31,
                   1981, File No. 1-5924--Exhibit 4(a).)

          *4(a)(27)-- Twenty-sixth Supplemental Indenture, dated as of
                   April 1, 1981.  (Form 10-Q for quarter ended March 31,
                   1981, File No. 1-5924--Exhibit 4(b).)

          *4(a)(28)-- Twenty-seventh Supplemental Indenture, dated as of
                   October 1, 1981.  (Form 10-Q for quarter ended September
                   30, 1982, File No. 1-5924--Exhibit 4(c).)


                               EXHIBIT INDEX (CONTINUED)

          *4(a)(29)-- Twenty-eighth Supplemental Indenture, dated as of
                   June 1, 1990.  (Form 10-Q for quarter ended June 30, 1990,
                   File No. 1-5924--Exhibit 4(a)(1).)

          *4(a)(30)-- Twenty-ninth Supplemental Indenture, dated as of
                   December 1, 1992.  (Form S-1, Registration No. 33-55732--
                   Exhibit 4(a)(30).)

          *4(a)(31)-- Thirtieth Supplemental Indenture, dated as of
                   December 1, 1992.  (Form S-1, Registration No. 33-55732--
                   Exhibit 4(a)(31).)

          *4(a)(32)-- Thirty-first Supplemental Indenture, dated as of
                   May 1, 1996.  (Form 10-K for the year ended December 31,
                   1996, File No. 1-5924--Exhibit 4(a)(32).)

          *4(a)(33)-- Thirty-second Supplemental Indenture, dated as of
                   May 1, 1996.  (Form 10-K for the year ended December 31,
                   1996, File No. 1-5924--Exhibit 4(a)(33).)

          *4(a)(34)-- Thirty-third Supplemental Indenture, dated as of May 1,
                   1998.  (Form 10-Q for the quarter ended June 30, 1998,
                   File No. 1-5924 - Exhibit 4(a).)

          *4(a)(35)-- Thirty-fourth Supplemental Indenture dated as of August
                   1, 1998. (Form 10-Q for the quarter ended June 30, 1998,
                   File No. 1-5924 - Exhibit 4(b).)

          *4(b)(1)-- Installment Sale Agreement, dated as of December 1,
                   1973, among the City of Farmington, New Mexico, Public
                   Service Company of New Mexico and TEP. (Form 8-K for the
                   month of January 1974, File No. 0-269--Exhibit 3.)

          *4(b)(2)-- Ordinance No. 486, adopted December 17, 1973, of the
                   City of Farmington, New Mexico. (Form 8-K for the month of
                   January 1974, File No. 0-269--Exhibit 4.)

          *4(b)(3)-- Amended and Restated Installment Sale Agreement dated as
                   of April 1, 1997, between the City of Farmington, New
                   Mexico and TEP relating to Pollution Control Revenue
                   Bonds, 1997 Series A (Tucson Electric Power Company San
                   Juan Project).  (Form 10-Q for the quarter ended March 31,
                   1997, File No. 1-5924--Exhibit 4(a).)

          *4(b)(4)-- City of Farmington, New Mexico Ordinance No. 97-1055,
                   adopted April 17, 1997, authorizing Pollution Control
                   Revenue Bonds, 1997 Series A (Tucson Electric Power
                   Company San Juan Project).  (Form 10-Q for the quarter
                   ended March 31, 1997, File No. 1-5924--Exhibit 4(b).)

          *4(c)(1)-- Loan Agreement, dated as of October 1, 1982, between the
                   Pima County Authority and TEP relating to Floating Rate
                   Monthly Demand Industrial Development Revenue Bonds, 1982
                   Series A (Tucson Electric Power Company Irvington
                   Project). (Form 10-Q for quarter ended September 30, 1982,
                   File No. 1-5924--Exhibit 4(a).)


                               EXHIBIT INDEX (CONTINUED)

          *4(c)(2)-- Indenture of Trust, dated as of October 1, 1982, between
                   the Pima County Authority and Morgan Guaranty authorizing
                   Floating Rate Monthly Demand Industrial Development
                   Revenue Bonds, 1982 Series A (Tucson Electric Power
                   Company Irvington Project). (Form 10-Q for quarter ended
                   September 30, 1982, File No. 1-5924--Exhibit 4(b).)

          *4(c)(3)-- First Supplemental Loan Agreement, dated as of March 31,
                   1992, between the Pima County Authority and TEP relating
                   to Industrial Development Revenue Bonds, 1982 Series A
                   (Tucson Electric Power Company Irvington Project).  (Form
                   S-4, Registration No. 33-52860--Exhibit 4(h)(3).)

          *4(c)(4)-- First Supplemental Indenture of Trust, dated as of March
                   31, 1992, between the Pima County Authority and Morgan
                   Guaranty relating to Industrial Development Revenue Bonds,
                   1982 Series A (Tucson Electric Power Company Irvington
                   Project). (Form S-4, Registration No. 33-52860--Exhibit
                   4(h)(4).)

          *4(d)(1)-- Loan Agreement, dated as of December 1, 1982, between
                   the Pima County Authority and TEP relating to Floating
                   Rate Monthly Demand Industrial Development Revenue Bonds,
                   1982 Series A (Tucson Electric Power Company Projects).
                   (Form 10-K for year ended December 31, 1982, File No. 1-
                   5924--Exhibit 4(k)(1).)

          *4(d)(2)-- Indenture of Trust, dated as of December 1, 1982,
                   between the Pima County Authority and Morgan Guaranty
                   authorizing Floating Rate Monthly Demand Industrial
                   Development Revenue Bonds, 1982 Series A (Tucson Electric
                   Power Company Projects). (Form 10-K for year ended
                   December 31, 1982, File No. 1-5924--Exhibit 4(k)(2).)

          *4(d)(3)-- First Supplemental Loan Agreement, dated as of March 31,
                   1992, between the Pima County Authority and TEP relating
                   to Industrial Development Revenue Bonds, 1982 Series A
                   (Tucson Electric Power Company Projects). (Form S-4,
                   Registration No. 33-52860--Exhibit 4(i)(3).)

          *4(d)(4)-- First Supplemental Indenture of Trust, dated as of March
                   31, 1992, between the Pima County Authority and Morgan
                   Guaranty relating to Industrial Development Revenue Bonds,
                   1982 Series A (Tucson Electric Power Company Projects).
                   (Form S-4, Registration No. 33-52860--Exhibit 4(i)(4).)

          *4(e)(1)-- Loan Agreement, dated as of December 1, 1983, between
                   the Apache County Authority and TEP relating to Floating
                   Rate Monthly Demand Industrial Development Revenue Bonds,
                   1983 Series A (Tucson Electric Power Company Springerville
                   Project). (Form 10-K for year ended December 31, 1983,
                   File No. 1-5924--Exhibit 4(l)(1).)

          *4(e)(2)-- Indenture of Trust, dated as of December 1, 1983,
                   between the Apache County Authority and Morgan Guaranty
                   authorizing Floating Rate Monthly Demand Industrial


                               EXHIBIT INDEX (CONTINUED)

                   Development Revenue Bonds, 1983 Series A (Tucson Electric
                   Power Company Springerville Project). (Form 10-K for year
                   ended December 31, 1983, File No. 1-5924--Exhibit
                   4(l)(2).)

          *4(e)(3)-- First Supplemental Loan Agreement, dated as of December
                   1, 1985, between the Apache County Authority and TEP
                   relating to Floating Rate Monthly Demand Industrial
                   Development Revenue Bonds, 1983 Series A (Tucson Electric
                   Power Company Springerville Project). (Form 10-K for the
                   year ended December 31, 1987, File No. 1-5924--Exhibit
                   4(k)(3).)

          *4(e)(4)-- First Supplemental Indenture, dated as of December 1,
                   1985, between the Apache County Authority and Morgan
                   Guaranty relating to Floating Rate Monthly Demand
                   Industrial Development Revenue Bonds, 1983 Series A
                   (Tucson Electric Power Company Springerville Project).
                   (Form 10-K for the year ended December 31, 1987, File No.
                   1-5924--Exhibit 4(k)(4).)

          *4(e)(5)-- Second Supplemental Loan Agreement, dated as of March
                   31, 1992, between the Apache County Authority and TEP
                   relating to Industrial Development Revenue Bonds, 1983
                   Series A (Tucson Electric Power Company Springerville
                   Project).  (Form S-4, Registration No. 33-52860--Exhibit
                   4(k)(5).)

          *4(e)(6)-- Second Supplemental Indenture of Trust, dated as of
                   March 31, 1992, between the Apache County Authority and
                   Morgan Guaranty relating to Industrial Development Revenue
                   Bonds, 1983 Series A (Tucson Electric Power Company
                   Springerville Project).  (Form S-4, Registration No. 33-
                   52860--Exhibit 4(k)(6).)

          *4(f)(1)-- Loan Agreement, dated as of December 1, 1983, between
                   the Apache County Authority and TEP relating to Variable
                   Rate Demand Industrial Development Revenue Bonds, 1983
                   Series B (Tucson Electric Power Company Springerville
                   Project). (Form 10-K for year ended December 31, 1983,
                   File No. 1-5924--Exhibit 4(m)(1).)

          *4(f)(2)-- Indenture of Trust, dated as of December 1, 1983,
                   between the Apache County Authority and Morgan Guaranty
                   authorizing Variable Rate Demand Industrial Development
                   Revenue Bonds, 1983 Series B (Tucson Electric Power
                   Company Springerville Project). (Form 10-K for year ended
                   December 31, 1983, File No. 1-5924--Exhibit 4(m)(2).)

          *4(f)(3)-- First Supplemental Loan Agreement, dated as of December
                   1, 1985, between the Apache County Authority and TEP
                   relating to Floating Rate Monthly Demand Industrial
                   Development Revenue Bonds, 1983 Series B (Tucson Electric
                   Power Company Springerville Project). (Form 10-K for the
                   year ended December 31, 1987, File No. 1-5924--Exhibit
                   4(l)(3).)


                               EXHIBIT INDEX (CONTINUED)

          *4(f)(4)-- First Supplemental Indenture, dated as of December 1,
                   1985, between the Apache County Authority and Morgan
                   Guaranty relating to Floating Rate Monthly Demand
                   Industrial Development Revenue Bonds, 1983 Series B
                   (Tucson Electric Power Company Springerville Project).
                   (Form 10-K for the year ended December 31, 1987, File No.
                   1-5924--Exhibit 4(l)(4).)

          *4(f)(5)-- Second Supplemental Loan Agreement, dated as of March
                   31, 1992, between the Apache County Authority and TEP
                   relating to Industrial Development Revenue Bonds, 1983
                   Series B (Tucson Electric Power Company Springerville
                   Project).  (Form S-4, Registration No. 33-52860--Exhibit
                   4(l)(5).)

          *4(f)(6)-- Second Supplemental Indenture of Trust, dated as of
                   March 31, 1992, between the Apache County Authority and
                   Morgan Guaranty relating to Industrial Development Revenue
                   Bonds, 1983 Series B (Tucson Electric Power Company
                   Springerville Project).  (Form S-4, Registration No. 33-
                   52860--Exhibit 4(l)(6).)

          *4(g)(1)-- Loan Agreement, dated as of December 1, 1983, between
                   the Apache County Authority and TEP relating to Variable
                   Rate Demand Industrial Development Revenue Bonds, 1983
                   Series C (Tucson Electric Power Company Springerville
                   Project). (Form 10-K for year ended December 31, 1983,
                   File No. 1-5924--Exhibit 4(n)(1).)

          *4(g)(2)-- Indenture of Trust, dated as of December 1, 1983,
                   between the Apache County Authority and Morgan Guaranty
                   authorizing Variable Rate Demand Industrial Development
                   Revenue Bonds, 1983 Series C (Tucson Electric Power
                   Company Springerville Project).  (Form 10-K for year ended
                   December 31, 1983, File No. 1-5924--Exhibit 4(n)(2).)

          *4(g)(3)-- First Supplemental Loan Agreement, dated as of December
                   1, 1985, between the Apache County Authority and TEP
                   relating to Floating Rate Monthly Demand Industrial
                   Development Revenue Bonds, 1983 Series C (Tucson Electric
                   Power Company Springerville Project). (Form 10-K for the
                   year ended December 31, 1987, File No. 1-5924--Exhibit
                   4(m)(3).)

          *4(g)(4)-- First Supplemental Indenture, dated as of December 1,
                   1985, between the Apache County Authority and Morgan
                   Guaranty relating to Floating Rate Monthly Demand
                   Industrial Development Revenue Bonds, 1983 Series C
                   (Tucson Electric Power Company Springerville Project).
                   (Form 10-K for the year ended December 31, 1987, File No.
                   1-5924--Exhibit 4(m)(4).)

          *4(g)(5)-- Second Supplemental Loan Agreement, dated as of March
                   31, 1992, between the Apache County Authority and TEP
                   relating to Industrial Development Revenue Bonds, 1983
                   Series C (Tucson Electric Power Company Springerville


                               EXHIBIT INDEX (CONTINUED)
                   Project).  (Form S-4, Registration No. 33-52860--Exhibit
                   4(m)(5).)

          *4(g)(6)-- Second Supplemental Indenture of Trust, dated as of
                   March 31, 1992, between the Apache County Authority and
                   Morgan Guaranty relating to Industrial Development Revenue
                   Bonds, 1983 Series C (Tucson Electric Power Company
                   Springerville Project).  (Form S-4, Registration No. 33-
                   52860--Exhibit 4(m)(6).)

          *4(h) -- Reimbursement Agreement, dated as of September 15, 1981,
                   as amended, between TEP and Manufacturers Hanover Trust
                   Company. (Form 10-K for the year ended December 31, 1984,
                   File No. 1-5924--Exhibit 4(o)(4).)

          *4(i)(1)-- Loan Agreement, dated as of December 1, 1985, between
                   the Apache County Authority and TEP relating to Variable
                   Rate Demand Industrial Development Revenue Bonds, 1985
                   Series A (Tucson Electric Power Company Springerville
                   Project). (Form 10-K for the year ended December 31, 1985,
                   File No. 1-5924---Exhibit 4(r)(1).)

          *4(i)(2)-- Indenture of Trust, dated as of December 1, 1985,
                   between the Apache County Authority and Morgan Guaranty
                   authorizing Variable Rate Demand Industrial Development
                   Revenue Bonds, 1985 Series A (Tucson Electric Power
                   Company Springerville Project). (Form 10-K for the year
                   ended December 31, 1985, File No. 1-5924--Exhibit
                   4(r)(2).)

          *4(i)(3)-- First Supplemental Loan Agreement, dated as of March 31,
                   1992, between the Apache County Authority and TEP relating
                   to Industrial Development Revenue Bonds, 1985 Series A
                   (Tucson Electric Power Company Springerville Project).
                   (Form S-4, Registration No. 33-52860--Exhibit 4(o)(3).)

          *4(i)(4)-- First Supplemental Indenture of Trust, dated as of March
                   31, 1992, between the Apache County Authority and Morgan
                   Guaranty relating to Industrial Development Revenue Bonds,
                   1985 Series A (Tucson Electric Power Company Springerville
                   Project).  (Form S-4, Registration No. 33-52860--Exhibit
                   4(o)(4).)

          *4(j)(1)-- Warrant Agreement and Form of Warrant, dated as of
                   December 15, 1992.  (Form S-1, Registration No. 33-55732--
                   Exhibit 4(q).)

          * 4(j)(2)-- Form of Warrant Agreement relating to the UniSource
                   Energy Warrants, dated as of August 4, 1998.  (Form S-4,
                   Registration Statement No. 333-60809--Exhibit 4(a).)

          *4(k)(1)-- Indenture of Mortgage and Deed of Trust dated as of
                   December 1, 1992, to Bank of Montreal Trust Company,
                   Trustee.  (Form S-1, Registration No. 33-55732--Exhibit
                   4(r)(1).)


                               EXHIBIT INDEX (CONTINUED)

          *4(k)(2)-- Supplemental Indenture No. 1 creating a series of bonds
                   designated Second Mortgage Bonds, Collateral Series A,
                   dated as of December 1, 1992.  (Form S-1, Registration No.
                   33-55732--Exhibit 4(r)(2).)

          *4(k)(3)-- Supplemental Indenture No. 2 creating a series of bonds
                   designated Second Mortgage Bonds, Collateral Series B,
                   dated as of December 1, 1997.  (Form 10-K for year ended
                   December 31, 1997, File No. 1-5924 -- Exhibit 4(m)(3).)

          *4(k)(4)-- Supplemental Indenture No. 3 creating a series of bonds
                   designated Second Mortgage Bonds, Collateral Series, dated
                   as of August 1, 1998.  (Form 10-Q for the quarter ended
                   June 30, 1998, File No. 1-5924 -- Exhibit 4(c).)

          *4(l)(1)-- Loan Agreement, dated as of April 1, 1997, between
                   Coconino County, Arizona Pollution Control Corporation and
                   TEP relating to Pollution Control Revenue Bonds, 1997
                   Series A (Tucson Electric Power Company Navajo Project).
                   (Form 10-Q for the quarter ended March 31, 1997, File No.
                   1-5924--Exhibit 4(c).)

          *4(l)(2)-- Indenture of Trust, dated as of April 1, 1997, between
                   Coconino County, Arizona Pollution Control Corporation and
                   First Trust of New York, National Association, authorizing
                   Pollution Control Revenue Bonds, 1997 Series A  (Tucson
                   Electric Power Company Navajo Project).  (Form 10-Q for
                   the quarter ended March 31, 1997, File No. 1-5924--Exhibit
                   4(d).)

          *4(m)(1)-- Loan Agreement, dated as of April 1, 1997, between
                   Coconino County, Arizona Pollution Control Corporation and
                   TEP relating to Pollution Control Revenue Bonds, 1997
                   Series B (Tucson Electric Power Company Navajo Project).
                   (Form 10-Q for the quarter ended March 31, 1997, File No.
                   1-5924-Exhibit 4(e).)

          *4(m)(2)-- Indenture of Trust, dated as of April 1, 1997, between
                   Coconino County, Arizona Pollution Control Corporation and
                   First Trust of New York, National Association, authorizing
                   Pollution Control Revenue Bonds, 1997 Series B  (Tucson
                   Electric Power Company Navajo Project). (Form 10-Q for the
                   quarter ended March 31, 1997, File No. 1-5924-Exhibit
                   4(f).)

          *4(n)(1)-- Loan Agreement, dated as of September 15, 1997, between
                   The Industrial Development Authority of the County of Pima
                   and TEP relating to Industrial Development Revenue Bonds,
                   1997 Series A (Tucson Electric Power Company Project).
                   (Form 10-Q for the quarter ended September 30, 1997, File
                   No. 1-5924-Exhibit 4(a).)

          *4(n)(2)-- 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).  (Form


                               EXHIBIT INDEX (CONTINUED)

                   10-Q for the quarter ended September 30, 1997, File No. 1-
                   5924-Exhibit 4(b).)

          *4(o)(1)-- Loan Agreement, dated as of September 15, 1997, between
                   The Industrial Development Authority of the County of Pima
                   and TEP relating to Industrial Development Revenue Bonds,
                   1997 Series B (Tucson Electric Power Company Project).
                   (Form 10-Q for the quarter ended September 30, 1997, File
                   No. 1-5924--Exhibit 4(c).)

          *4(o)(2)-- 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).  (Form
                   10-Q for the quarter ended September 30, 1997, File No. 1-
                   5924--Exhibit 4(d).)

          *4(p)(1)-- Loan Agreement, dated as of September 15, 1997, between
                   The Industrial Development Authority of the County of Pima
                   and TEP relating to Industrial Development Revenue Bonds,
                   1997 Series C (Tucson Electric Power Company Project).
                   (Form 10-Q for the quarter ended September 30, 1997, File
                   No. 1-5924--Exhibit 4(e).)

          *4(p)(2)-- 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).  (Form
                   10-Q for the quarter ended September 30, 1997, File No. 1-
                   5924-Exhibit 4(f).)

          *4(q)(1) Loan Agreement, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache
                   and TEP relating to Pollution Control Revenue Bonds, 1998
                   Series A (Tucson Electric Power Company Project).  (Form
                   10-Q for the quarter ended March 31, 1998, File No. 1-5924
                   - Exhibit 4(a).)

          *4(q)(2) Indenture of Trust, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache
                   and First Trust of New York, National Association,
                   authorizing Pollution Control Revenue Bonds, 1998 Series A
                   (Tucson Electric Power Company Project). (Form 10-Q for
                   the quarter ended March 31, 1998, File No. 1-5924 -
                   Exhibit 4(b).)

          *4(r)(1) Loan Agreement, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache
                   and TEP relating to Pollution Control Revenue Bonds, 1998
                   Series B (Tucson Electric Power Company Project). (Form
                   10-Q for the quarter ended March 31, 1998, File No. 1-5924
                   - Exhibit 4(c).)

          *4(r)(2) Indenture of Trust, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache


                               EXHIBIT INDEX (CONTINUED)

                   and First Trust of New York, National Association,
                   authorizing Pollution Control Revenue Bonds, 1998 Series B
                   (Tucson Electric Power Company Project). (Form 10-Q for
                   the quarter ended March 31, 1998, File No. 1-5924 -
                   Exhibit 4(d).)

          *4(s)(1) Loan Agreement, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache
                   and TEP relating to Industrial Development Revenue Bonds,
                   1998 Series C (Tucson Electric Power Company Project).
                   (Form 10-Q for the quarter ended March 31, 1998, File No.
                   1-5924 - Exhibit 4(e).)

          *4(s)(2) Indenture of Trust, dated as of March 1, 1998, between The
                   Industrial Development Authority of the County of Apache
                   and First Trust of New York, National Association,
                   authorizing Industrial Development Revenue Bonds, 1998
                   Series C (Tucson Electric Power Company Project). (Form
                   10-Q for the quarter ended March 31, 1998, File No. 1-5924
                   - Exhibit 4(f).)

          *4(t)(1)-- Indenture of Trust, dated as of August 1, 1998, between
                   TEP and the Bank of Montreal Trust Company.  (Form 10-Q
                   for the quarter ended June 30, 1998, File No. 1-5924 -
                   Exhibit 4(d).)

          *4(u)(1)-- Rights Agreement dated as of March 5, 1999, between
                   UniSource Energy Corporation and The Bank of New York, as
                   Rights Agent.  (Form 8-K dated March 5, 1999, File No. 1-
                   13739 - Exhibit 4.)

          *10(a)(1)-- Lease Agreements, dated as of December 1, 1984,
                   between Valencia and United States Trust Company of New
                   York, as Trustee, and Thomas B. Zakrzewski, as Co-Trustee,
                   as amended and supplemented. (Form 10-K for the year ended
                   December 31, 1984, File No. 1-5924--Exhibit 10(d)(1).)

          *10(a)(2)-- Guaranty and Agreements, dated as of December 1,
                   1984, between TEP and United States Trust Company of New
                   York, as Trustee, and Thomas B. Zakrzewski, as Co-Trustee.
                   (Form 10-K for the year ended December 31, 1984, File No.
                   1-5924--Exhibit 10(d)(2).)

          *10(a)(3)-- General Indemnity Agreements, dated as of December
                   1, 1984, between Valencia and TEP, as Indemnitors; General
                   Foods Credit Corporation, Harvey Hubbell Financial, Inc.
                   and J. C. Penney Company, Inc. as Owner Participants;
                   United States Trust Company of New York, as Owner Trustee;
                   Teachers Insurance and Annuity Association of America as
                   Loan Participant; and Marine Midland Bank, N.A., as
                   Indenture Trustee. (Form 10-K for the year ended December
                   31, 1984, File No. 1-5924--Exhibit 10(d)(3).)

          *10(a)(4)-- Tax Indemnity Agreements, dated as of December 1,
                   1984, between General Foods Credit Corporation, Harvey
                   Hubbell Financial, Inc. and J. C. Penney Company, Inc.,
                   each as Beneficiary under a separate Trust Agreement dated


                               EXHIBIT INDEX (CONTINUED)

                   December 1, 1984, with United States Trust of New York as
                   Owner Trustee, and Thomas B. Zakrzewski as Co-Trustee,
                   Lessor, and Valencia, Lessee, and TEP, Indemnitors. (Form
                   10-K for the year ended December 31, 1984, File No. 1-
                   5924--Exhibit 10(d)(4).)

          *10(a)(5)-- Amendment No. 1, dated December 31, 1984, to the
                   Lease Agreements, dated December 1, 1984, between Valencia
                   and United States Trust Company of New York, as Owner
                   Trustee, and Thomas B. Zakrzewski as Co-Trustee. (Form 10-
                   K for the year ended December 31, 1986, File No. 1-5924--
                   Exhibit 10(e)(5).)

          *10(a)(6)-- Amendment No. 2, dated April 1, 1985, to the Lease
                   Agreements, dated December 1, 1984, between Valencia and
                   United States Trust Company of New York, as Owner Trustee,
                   and Thomas B. Zakrzewski as Co-Trustee. (Form 10-K for the
                   year ended December 31, 1986, File No. 1-5924--Exhibit
                   10(e)(6).)

          *10(a)(7)-- Amendment No. 3, dated August 1, 1985, to the Lease
                   Agreements, dated December 1, 1984, between Valencia and
                   United States Trust Company of New York, as Owner Trustee,
                   and Thomas Zakrzewski as Co-Trustee.  (Form 10-K for the
                   year ended December 31, 1986, File No. 1-5924--Exhibit
                   10(e)(7).)

          *10(a)(8)-- Amendment No. 4, dated June 1, 1986, to the Lease
                   Agreement, dated December 1, 1984, between Valencia and
                   United States Trust Company of New York as Owner Trustee,
                   and Thomas Zakrzewski as Co-Trustee, under a Trust
                   Agreement dated as of December 1, 1984, with General Foods
                   Credit Corporation as Owner Participant. (Form 10-K for
                   the year ended December 31, 1986, File No. 1-5924--Exhibit
                   10(e)(8).)

          *10(a)(9)-- Amendment No. 4, dated June 1, 1986, to the Lease
                   Agreement, dated December 1, 1984, between Valencia and
                   United States Trust Company of New York as Owner Trustee,
                   and Thomas Zakrzewski as Co-Trustee, under a Trust
                   Agreement dated as of December 1, 1984, with J. C. Penney
                   Company, Inc. as Owner Participant. (Form 10-K for the
                   year ended December 31, 1986, File No. 1-5924--Exhibit
                   10(e)(9).)

          *10(a)(10) -- Amendment No. 4, dated June 1, 1986, to the Lease
                   Agreement, dated December 1, 1984, between Valencia and
                   United States Trust Company of New York as Owner Trustee,
                   and Thomas Zakrzewski as Co-Trustee, under a Trust
                   Agreement dated as of December 1, 1984, with Harvey
                   Hubbell Financial Inc. as Owner Participant. (Form 10-K
                   for the year ended December 31, 1986, File No. 1-5924--
                   Exhibit 10(e)(10).)

          *10(a)(11) -- Lease Amendment No. 5 and Supplement No. 2, to the
                   Lease Agreement, dated July 1, 1986, between Valencia,
                   United States Trust Company of New York as Owner Trustee,


                               EXHIBIT INDEX (CONTINUED)

                   and Thomas Zakrzewski as Co-Trustee and J. C. Penney as
                   Owner Participant. (Form 10-K for the year ended December
                   31, 1986, File No. 1-5924--Exhibit 10(e)(11).)

          *10(a)(12) -- Lease Amendment No. 5, to the Lease Agreement,
                   dated June 1, 1987, between Valencia, United States Trust
                   Company of New York as Owner Trustee, and Thomas
                   Zakrzewski as Co-Trustee and General Foods Credit
                   Corporation as Owner Participant.  (Form 10-K for the year
                   ended December 31, 1988, File No. 1-5924--Exhibit
                   10(f)(12).)

          *10(a)(13) -- Lease Amendment No. 5, to the Lease Agreement,
                   dated June 1, 1987, between Valencia, United States Trust
                   Company of New York as Owner Trustee, and Thomas
                   Zakrzewski as Co-Trustee and Harvey Hubbell Financial Inc.
                   as Owner Participant. (Form 10-K for the year ended
                   December 31, 1988, File No. 1-5924--Exhibit 10(f)(13).)

          *10(a)(14) -- Lease Amendment No. 6, to the Lease Agreement,
                   dated June 1, 1987, between Valencia, United States Trust
                   Company of New York as Owner Trustee, and Thomas
                   Zakrzewski as Co-Trustee and J. C. Penney Company, Inc. as
                   Owner Participant. (Form 10-K for the year ended December
                   31, 1988, File No. 1-5924--Exhibit 10(f)(14).)

          *10(a)(15) -- Lease Supplement No. 1, dated December 31, 1984, to
                   Lease Agreements, dated December 1, 1984, between
                   Valencia, as Lessee and United States Trust Company of New
                   York and Thomas B. Zakrzewski, as Owner Trustee and Co-
                   Trustee, respectively (document filed relates to General
                   Foods Credit Corporation; documents relating to Harvey
                   Hubbel Financial, Inc. and JC Penney Company, Inc. are not
                   filed but are substantially similar). (Form S-4,
                   Registration No. 33-52860--Exhibit 10(f)(15).)

          *10(a)(16) -- Amendment No. 1, dated June 1, 1986, to the General
                   Indemnity Agreement, dated as of December 1, 1984, between
                   Valencia and TEP, as Indemnitors, General Foods Credit
                   Corporation, as Owner Participant, United States Trust
                   Company of New York, as Owner Trustee, Teachers Insurance
                   and Annuity Association of America, as Loan Participant,
                   and Marine Midland Bank, N.A., as Indenture Trustee. (Form
                   10-K for the year ended December 31, 1986, File No. 1-
                   5924--Exhibit 10(e)(12).)

          *10(a)(17) -- Amendment No. 1, dated June 1, 1986, to the General
                   Indemnity Agreement, dated as of December 1, 1984, between
                   Valencia and TEP, as Indemnitors, J. C. Penney Company,
                   Inc., as Owner Participant, United States Trust Company of
                   New York, as Owner Trustee, Teachers Insurance and Annuity
                   Association of America, as Loan Participant, and Marine
                   Midland Bank, N.A., as Indenture Trustee. (Form 10-K for
                   the year ended December 31, 1986, File No. 1-5924--Exhibit
                   10(e)(13).)


                               EXHIBIT INDEX (CONTINUED)

          *10(a)(18) -- Amendment No. 1, dated June 1, 1986, to the General
                   Indemnity Agreement, dated as of December 1, 1984, between
                   Valencia and TEP, as Indemnitors, Harvey Hubbell
                   Financial, Inc., as Owner Participant, United States Trust
                   Company of New York, as Owner Trustee, Teachers Insurance
                   and Annuity Association of America, as Loan Participant,
                   and Marine Midland Bank, N.A., as Indenture Trustee.
                   (Form 10-K for the year ended December 31, 1986, File No.
                   1-5924--Exhibit 10(e)(14).)

          *10(a)(19) -- Amendment No. 2, dated as of July 1, 1986, to the
                   General Indemnity Agreement, dated as of December 1, 1984,
                   between Valencia and TEP, as Indemnitors, J. C. Penney
                   Company, Inc., as Owner Participant, United States Trust
                   Company of New York, as Owner Trustee, Teachers Insurance
                   and Annuity Association of America, as Loan Participant,
                   and Marine Midland Bank, N.A., as Indenture Trustee. (Form
                   S-4, Registration No. 33-52860--Exhibit 10(f)(19).)

          *10(a)(20) -- Amendment No. 2, dated as of June 1, 1987, to the
                   General Indemnity Agreement, dated as of December 1, 1984,
                   between Valencia and TEP, as Indemnitors, General Foods
                   Credit Corporation, as Owner Participant, United States
                   Trust Company of New York, as Owner Trustee, Teachers
                   Insurance and Annuity Association of America, as Loan
                   Participant, and Marine Midland Bank, N.A., as Indenture
                   Trustee. (Form S-4, Registration No. 33-52860--Exhibit
                   10(f)(20).)

          *10(a)(21) -- Amendment No. 2, dated as of June 1, 1987, to the
                   General Indemnity Agreement, dated as of December 1, 1984,
                   between Valencia and TEP, as Indemnitors, Harvey Hubbell
                   Financial, Inc., as Owner Participant, United States Trust
                   Company of New York, as Owner Trustee, Teachers Insurance
                   and Annuity Association of America, as Loan Participant,
                   and Marine Midland Bank, N.A., as Indenture Trustee. (Form
                   S-4, Registration No. 33-52860--Exhibit 10(f)(21).)

          *10(a)(22) -- Amendment No. 3, dated as of June 1, 1987, to the
                   General Indemnity Agreement, dated as of December 1, 1984,
                   between Valencia and TEP, as Indemnitors, J. C. Penney
                   Company, Inc., as Owner Participant, United States Trust
                   Company of New York, as Owner Trustee, Teachers Insurance
                   and Annuity Association of America, as Loan Participant,
                   and Marine Midland Bank, N.A., as Indenture Trustee. (Form
                   S-4, Registration No. 33-52860--Exhibit 10(f)(22).)

          *10(a)(23) -- Supplemental Tax Indemnity Agreement, dated July 1,
                   1986, between J. C. Penney Company, Inc., as Owner
                   Participant, and Valencia and TEP, as Indemnitors. (Form
                   10-K for the year ended December 31, 1986, File No. 1-
                   5924--Exhibit 10(e)(15).)

          *10(a)(24) -- Supplemental General Indemnity Agreement, dated as
                   of July 1, 1986, among Valencia and TEP, as Indemnitors,
                   J. C. Penney Company, Inc., as Owner Participant, United
                   States Trust Company of New York, as Owner Trustee,


                               EXHIBIT INDEX (CONTINUED)

                   Teachers Insurance and Annuity Association of America, as
                   Loan Participant, and Marine Midland Bank, N.A., as
                   Indenture Trustee. (Form 10-K for the year ended December
                   31, 1986, File No. 1-5924--Exhibit 10(e)(16).)

          *10(a)(25) -- Amendment No. 1, dated as of June 1, 1987, to the
                   Supplemental General Indemnity Agreement, dated as of July
                   1, 1986, among Valencia and TEP, as Indemnitors, J. C.
                   Penney Company, Inc., as Owner Participant, United States
                   Trust Company of New York, as Owner Trustee, Teachers
                   Insurance and Annuity Association of America, as Loan
                   Participant, and Marine Midland Bank, N.A., as Indenture
                   Trustee. (Form S-4, Registration No. 33-52860--Exhibit
                   10(f)(25).)

          *10(a)(26) -- Valencia Agreement, dated as of June 30, 1992,
                   among TEP, as Guarantor, Valencia, as Lessee, Teachers
                   Insurance and Annuity Association of America, as Loan
                   Participant, Marine Midland Bank, N.A., as Indenture
                   Trustee, United States Trust Company of New York, as Owner
                   Trustee, and Thomas B. Zakrzewski, as Co-Trustee, and the
                   Owner Participants named therein relating to the
                   Restructuring of Valencia's lease of the coal-handling
                   facilities at the Springerville Generating Station. (Form
                   S-4, Registration No. 33-52860--Exhibit 10(f)(26).)

          *10(a)(27) -- Amendment, dated as of December 15, 1992, to the
                   Lease Agreements, dated December 1, 1984, between
                   Valencia, as Lessee, and United States Trust Company of
                   New York, as Owner Trustee, and Thomas B. Zakrzewski, as
                   Co-Trustee.  (Form S-1, Registration No. 33-55732--Exhibit
                   10(f)(27).)

          *10(b)(1)-- Lease Agreements, dated as of December 1, 1985,
                   between TEP and San Carlos Resources Inc. (San Carlos) (a
                   wholly-owned subsidiary of the Registrant) jointly and
                   severally, as Lessee, and Wilmington Trust Company, as
                   Trustee, as amended and supplemented. (Form 10-K for the
                   year ended December 31, 1985, File No. 1-5924--Exhibit
                   10(f)(1).)

          *10(b)(2)-- Tax Indemnity Agreements, dated as of December 1,
                   1985, between Philip Morris Credit Corporation, IBM Credit
                   Financing Corporation and Emerson Finance Co., each as
                   beneficiary under a separate trust agreement, dated as of
                   December 1, 1985, with Wilmington Trust Company, as Owner
                   Trustee, and William J. Wade, as Co-Trustee, and TEP and
                   San Carlos, as Lessee.  (Form 10-K for the year ended
                   December 31, 1985, File No. 1-5924--Exhibit 10(f)(2).)

          *10(b)(3)-- Participation Agreement, dated as of December 1,
                   1985, among TEP and San Carlos as Lessee, Philip Morris
                   Credit Corporation, IBM Credit Financing Corporation, and
                   Emerson Finance Co. as Owner Participants, Wilmington
                   Trust Company as Owner Trustee, The Sumitomo Bank,
                   Limited, New York Branch, as Loan Participant, and Bankers
                   Trust Company, as Indenture Trustee. (Form 10-K for the


                               EXHIBIT INDEX (CONTINUED)

                   year ended December 31, 1985, File No. 1-5924--Exhibit
                   10(f)(3).)

          *10(b)(4)-- Restructuring Commitment Agreement, dated as of
                   June 30, 1992, among TEP and San Carlos, jointly and
                   severally, as Lessee, Philip Morris Credit Corporation,
                   IBM Credit Financing Corporation and Emerson Capital
                   Funding William J. Wade, as Owner Trustee and Co-Trustee,
                   respectively, The Sumitomo Bank, Limited, New York Branch,
                   as Loan Participant and United States Trust Company of New
                   York, as Indenture Trustee. (Form S-4, Registration No.
                   33-52860--Exhibit 10(g)(4).)

          *10(b)(5)-- Lease Supplement No. 1, dated December 31, 1985, to
                   Lease Agreements, dated as of December 1, 1985, between
                   TEP and San Carlos, jointly and severally, as Lessee
                   Trustee and Co-Trustee, respectively (document filed
                   relates to Philip Morris Credit Corporation; documents
                   relating to IBM Credit Financing Corporation and Emerson
                   Financing Co. are not filed but are substantially
                   similar). (Form S-4, Registration No. 33-52860--Exhibit
                   10(g)(5).)

          *10(b)(6)-- Amendment No. 1, dated as of December 15, 1992, to
                   Lease Agreements, dated as of December 1, 1985, between
                   TEP and San Carlos, jointly and severally, as Lessee, and
                   Wilmington Trust Company and William J. Wade, as Owner
                   Trustee and Co-Trustee, respectively, as Lessor.  (Form S-
                   1, Registration No. 33-55732--Exhibit 10(g)(6).)

          *10(b)(7)-- Amendment No. 1, dated as of December 15, 1992, to
                   Tax Indemnity Agreements, dated as of December 1, 1985,
                   between Philip Morris Credit Corporation, IBM Credit
                   Financing Corporation and Emerson Capital Funding Corp.,
                   as Owner Participants and TEP and San Carlos, jointly and
                   severally, as Lessee.  (Form S-1, Registration No. 33-
                   55732--Exhibit 10(g)(7).)

          *10(c)(1)-- Amended and Restated Participation Agreement, dated
                   as of November 15, 1987, among TEP, as Lessee, Ford Motor
                   Credit Company, as Owner Participant, Financial Security
                   Assurance Inc., as Surety, Wilmington Trust Company and
                   William J. Wade in their respective individual capacities
                   as provided therein, but otherwise solely as Owner Trustee
                   and Co-Trustee under the Trust Agreement, and Morgan
                   Guaranty, in its individual capacity as provided therein,
                   but Secured Party. (Form 10-K for the year ended December
                   31, 1987, File No. 1-5924--Exhibit 10(j)(1).)

          *10(c)(2)-- Lease Agreement, dated as of January 14, 1988,
                   between Wilmington Trust Company and William J. Wade, as
                   Owner Trust Agreement described therein, dated as of
                   November 15, 1987, between such parties and Ford Motor
                   Credit Company, as Lessor, and TEP, as Lessee. (Form 10-K
                   for the year ended December 31, 1987, File No. 1-5924--
                   Exhibit 10(j)(2).)


                               EXHIBIT INDEX (CONTINUED)

          *10(c)(3)-- Tax Indemnity Agreement, dated as of January 14,
                   1988, between TEP, as Lessee, and Ford Motor Credit
                   Company, as Owner Participant, beneficiary under a Trust
                   Agreement, dated as of November 15, 1987, with Wilmington
                   Trust Company and William J. Wade, Owner Trustee and Co-
                   Trustee, respectively, together as Lessor. (Form 10-K for
                   the year ended December 31, 1987, File No. 1-5924--Exhibit
                   10(j)(3).)

          *10(c)(4)-- Loan Agreement, dated as of January 14, 1988,
                   between the Pima County Authority and Wilmington Trust
                   Company and William J. Wade in their respective individual
                   capacities as expressly stated, but otherwise solely as
                   Owner Trustee and Co-Trustee, respectively, under and
                   pursuant to a Trust Agreement, dated as of November 15,
                   1987, with Ford Motor Credit Company as Trustor and Debtor
                   relating to Industrial Development Lease Obligation
                   Refunding Revenue Bonds, 1988 Series A (TEP's Irvington
                   Project). (Form 10-K for the year ended December 31, 1987,
                   File No. 1-5924--Exhibit 10(j)(4).)

          *10(c)(5)-- Indenture of Trust, dated as of January 14, 1988,
                   between the Pima County Authority and Morgan Guaranty
                   authorizing Industrial Development Lease Obligation
                   Refunding Revenue Bonds, 1988 Series A (Tucson Electric
                   Power Company Irvington Project). (Form 10-K for the year
                   ended December 31, 1987, File No. 1-5924--Exhibit
                   10(j)(5).)

          *10(c)(6)-- Lease Amendment No. 1, dated as of May 1, 1989,
                   between TEP, Wilmington Trust Company and William J. Wade
                   as Owner Trustee and Co-trustee, respectively under a
                   Trust Agreement dated as of November 15, 1987 with Ford
                   Motor Credit Company. (Form 10-K for the year ended
                   December 31, 1990, File No. 1-5924--Exhibit 10(i)(6).)

          *10(c)(7)-- Lease Supplement, dated as of January 1, 1991,
                   between TEP, Wilmington Trust Company and William J. Wade
                   as Owner Trustee and Co-Trustee, respectively, under a
                   Trust Agreement dated as of November 15, 1987, with Ford.
                   (Form 10K for the year ended December 31, 1991, File No.
                   1-5924--Exhibit 10(i)(8).)

          *10(c)(8)-- Lease Supplement, dated as of March 1, 1991,
                   between TEP, Wilmington Trust Company and William J. Wade
                   as Owner Trustee and Co-Trustee, respectively, under a
                   Trust Agreement dated as of November 15, 1987, with Ford.
                   (Form 10-K for the year ended December 31, 1991, File No.
                   1-5924--Exhibit 10(i)(9).)

          *10(c)(9)-- Lease Supplement No. 4, dated as of December 1,
                   1991, between TEP, Wilmington Trust Company and William J.
                   Wade as Owner Trustee and Co-Trustee, respectively, under
                   a Trust Agreement dated as of November 15, 1987, with
                   Ford. (Form 10-K for the year ended December 31, 1991,
                   File No. 1-5924--Exhibit 10(i)(10).)


                               EXHIBIT INDEX (CONTINUED)

          *10(c)(10) -- Supplemental Indenture No. 1, dated as of December
                   1, 1991, between the Pima County Authority and Morgan
                   Guaranty relating to Industrial Lease Development
                   Obligation Revenue Project). (Form 10-K for the year ended
                   December 31, 1991, File No. 1-5924--Exhibit 10(I)(11).)

          *10(c)(11) -- Restructuring Commitment Agreement, dated as of
                   June 30, 1992, among TEP, as Lessee, Ford Motor Credit
                   Company, as Owner Participant, Wilmington Trust Company
                   and William J. Wade, as Owner Trustee and Co-Trustee,
                   respectively, and Morgan Guaranty, as Indenture Trustee
                   and Refunding Trustee, relating to the restructuring of
                   the Registrant's lease of Unit 4 at the Irvington
                   Generating Station. (Form S-4, Registration No. 33-52860--
                   Exhibit 10(i)(12).)

          *10(c)(12) -- Amendment No. 1, dated as of December 15, 1992, to
                   Amended and Restated Participation Agreement, dated as of
                   November 15, 1987, among TEP, as Lessee, Ford Motor Credit
                   Company, as Owner Participant, Wilmington Trust Company
                   and William J. Wade, as Owner Trustee and Co-Trustee,
                   respectively, Financial Security Assurance Inc., as
                   Surety, and Morgan Guaranty, as Indenture Trustee.  (Form
                   S-1, Registration No. 33-55732--Exhibit 10(h)(12).)

          *10(c)(13) -- Amended and Restated Lease, dated as of December
                   15, 1992, between TEP, as Lessee and Wilmington Trust
                   Company and William J. Wade, as Owner Trustee and Co-
                   Trustee, respectively, as Lessor.  (Form S-1, Registration
                   No. 33-55732--Exhibit 10(h)(13).)

          *10(c)(14) -- Amended and Restated Tax Indemnity Agreement, dated
                   as of December 15, 1992, between TEP, as Lessee, and Ford
                   Motor Credit Company, as Owner Participant.  (Form S-1,
                   Registration No. 33-55732--Exhibit 10(h)(14).)

          *10(d)-- Power Sale Agreement for the years 1990 to 2011, dated as
                   of March 10, 1988, between TEP and Salt River Project
                   Agricultural Improvement and Power District. (Form 10-K
                   for the year ended December 31, 1987, File No. 1-5924--
                   Exhibit 10(k).)

          +*10(e)(1) -- Employment Agreements between TEP and currently in
                   effect with Ira R. Adler, Michael DeConcini, Thomas A.
                   Delawder, Gary L. Ellerd, Steven J. Glaser, Thomas N.
                   Hansen, Karen G. Kissinger, Kevin P. Larson, Dennis R.
                   Nelson, Vincent Nitido, James S. Pignatelli, James Pyers
                   and Romano Salvatori.  (Form 10-K for the year ended
                   December 31, 1996, File No. 1-5924-Exhibit 10(g)(1).)

          +*10(e)(2) -- Employment Agreement between TEP and Romano
                   Salvatori.  (Form 10-K for the year ended December 31,
                   1996, File No. 1-5924-Exhibit 10(g)(2).)

          *10(e)(3)-- Letter, dated February 25, 1992, from Dr. Martha R.
                   Seger to TEP and Capital Holding Corporation. (Form S-4,
                   Registration No. 33-52860--Exhibit 10(k)(4).)


                               EXHIBIT INDEX (CONTINUED)

          +*10(e)(4) -- Amendment No. 1 to Employment Agreement among
                   Romano Salvatori, TEP and Nations Energy Corporation.
                   (Form 10-K for the year ended December 31, 1997, File Nos.
                   1-5924 and 1-13739--Exhibit 10(e)(4).)

          +*10(e)(5) -- Amendment No. 1 to Amended and Restated Employment
                   Agreement between TEP and currently in effect with Ira R.
                   Adler, Michael DeConcini, Thomas A. Delawder, Gary L.
                   Ellerd, Steven J. Glaser, Thomas N. Hansen, Karen G.
                   Kissinger, Kevin P. Larson, Dennis R. Nelson, Vincent
                   Nitido, James S. Pignatelli, James Pyers and Romano
                   Salvatori.  (Form 10-K for the year ended December 31,
                   1997, File Nos. 1-5924 and 1-13739--Exhibit 10(e)(5).)

          *10(f)-- Power Sale Agreement, dated April 29, 1988, for the dates
                   of May 16, 1990 to December 31, 1995, between TEP and
                   Nevada Power Company. (Form 10-K for the year ended
                   December 31, 1988, File No 1-5924--Exhibit 10(m)(2).)

          *10(g)-- Participation Agreement, dated as of June 30, 1992, among
                   TEP, as Lessee, various parties thereto, as Owner
                   Wilmington Trust Company and William J. Wade, as Owner
                   Trustee and Co-Trustee, respectively, and LaSalle National
                   Bank, as Indenture Trustee relating to TEP's lease of
                   Springerville Unit 1.  (Form S-1, Registration No. 33-
                   55732--Exhibit 10(u).)

          *10(h)-- Lease Agreement, dated as of December 15, 1992, between
                   TEP, as Lessee and Wilmington Trust Company and William J.
                   Wade, as Owner Trustee and Co-Trustee, respectively, as
                   Lessor.  (Form S-1, Registration No. 33-55732--Exhibit
                   10(v).)

          *10(i)-- Tax Indemnity Agreements, dated as of December 15, 1992,
                   between the various Owner Participants parties thereto and
                   TEP, as Lessee.  (Form S-1, Registration No. 33-55732,
                   Exhibit 10(w).)

          *10(j)-- Restructuring Agreement, dated as of December 1, 1992,
                   between TEP and Century Power Corporation.  (Form S-1,
                   Registration No. 33-55732--Exhibit 10(x).)

          *10(k)-- Voting Agreement, dated as of December 15, 1992, between
                   TEP and Chrysler Capital Corporation (documents relating
                   to CILCORP Lease Management, Inc., MWR Capital Inc., US
                   West Financial Services, Inc. and Philip Morris Capital
                   Corporation are not filed but are substantially similar).
                   (Form S-1, Registration No. 33-55732--Exhibit 10(y).)


                               EXHIBIT INDEX (CONCLUDED)
          *10(l)(1)-- Wholesale Power Supply Agreement between TEP and
                   Navajo Tribal Utility Authority dated January 5, 1993.
                   (Form 10-K for the year ended December 31, 1992, File No.
                   1-5924--Exhibit 10(t).)

          *10(l)(2)-- Amended and Restated Wholesale Power Supply
                   Agreement between TEP and Navajo Tribal Utility Authority,
                   dated June 25, 1997.  (Form 10-Q for the quarter ended
                   June 30, 1997, File No. 1-5924-Exhibit 10.)

          *10(m)-- Credit Agreement dated as of December 30, 1997, among TEP,
                   Toronto Dominion (Texas), Inc., as Administrative Agent,
                   The Bank of New York, as Syndication Agent, Societe
                   Generale, as Documentation Agent, the lenders party
                   hereto, and the issuing banks party hereto. (Form 10-K for
                   year ended December 31, 1997, File No. 1-5924-Exhibit
                   10(m).)

          +*10(n)--1994 Omnibus Stock and Incentive Plan of UniSource Energy.
                   (Form S-8 dated January 6, 1998, File No. 333-43767.)

          +*10(o)--1994 Outside Director Stock Option Plan of UniSource
                   Energy.  (Form S-8 dated January 6, 1998, File No. 333-
                   43765.)

          +*10(p)--Management and Directors Deferred Compensation Plan of
                   UniSource Energy.  (Form S-8 dated January 6, 1998, File
                   No. 333-43769.)

          +*10(q)--TEP Supplemental Retirement Account for Classified
                   Employees.  (Form S-8 dated May 21, 1998, File No. 333-
                   53309.)

          +*10(r)--TEP Triple Investment Plan for Salaried Employees.  (Form
                   S-8 dated May 21, 1998, File No. 333-53333.)

          +*10(s)--UniSource Energy Management and Directors Deferred
                   Compensation Plan.  (Form S-8 dated May 21, 1998, File No.
                   333-53337.)

          11    -- Statement re computation of per share earnings-UniSource
                   Energy.

          12    -- Computation of Ratio of Earnings to Fixed Charges--TEP.

          21    -- Subsidiaries of the Registrants.

          23(a) -- Consents of experts (PricewaterhouseCoopers).

          23(b) -- Consents of experts (Deloitte & Touche).

          24(a) -- Power of Attorney--UniSource Energy.

          24(b) -- Power of Attorney--TEP.

          27(a) -- Financial Data Schedule--UniSource Energy.


                               EXHIBIT INDEX (CONCLUDED)

          27(b) -- Financial Data Schedule--TEP.

          (*)Previously filed as indicated and incorporated herein by
          reference.
          (+)Management contracts or compensatory plans or arrangements
            required to be filed as exhibits to this Form 10-K by item
            601(b)(10)(iii) of Regulation S-K.



                                 
                                                     Exhibit 11
                                 
                                 
                   UNISOURCE ENERGY CORPORATION
                 COMPUTATION OF EARNINGS PER SHARE


                                        Years Ended December 31,
                                        1998       1997       1996
                                       ------     ------     ------
                                         - Thousands of Dollars -
                                          (except per share data)
Basic Earnings Per Share:
Numerator:  Net Income                $28,032    $83,572   $120,852
Denominator:
  Average Shares of Common Stock -
    Outstanding                        32,178     32,138     32,136
                                       ------     ------    -------
Basic Earnings Per Share              $  0.87    $  2.60   $   3.76
                                       ======     ======    =======

Diluted Earnings Per Share:
Numerator:  Net Income                $28,032    $83,572   $120,852
Denominator:
  Average Shares of Common Stock -
    Outstanding                        32,178     32,138     32,136
  Effect of Dilutive Securities:
    Warrants                               79         53         81
    Options                                90         87         36
                                       ------     ------    -------
  Total Shares                         32,347     32,278     32,253
                                       ------     ------    -------
Diluted Earnings Per Share            $  0.87    $  2.59   $   3.75
                                       ======     ======    =======

      Options to purchase 460,000 shares of common stock at  $16.25
per share were outstanding at the end of the year 1998 but were not
included  in  the computation of diluted EPS because  the  options'
exercise  price was greater than the average market  price  of  the
common shares.

      4.6  million  of  the  7.6 million warrants  outstanding  are
exercisable  into  TEP common stock.  See Note  13.   However,  the
dilutive  effect  is the same as it would be if the  warrants  were
exercisable into UniSource Energy Common Stock.



<TABLE>
                                                                                 Exhibit 12

                                  TUCSON ELECTRIC POWER COMPANY
                        COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                                            (IN THOUSANDS)


                                                                12 Months Ended
                                                                ----------------
                                                Dec. 31,   Dec. 31,   Dec. 31,  Dec. 31,  Dec. 31,
                                                  1998       1997       1996      1995      1994
                                                --------   --------   --------  -------   --------
<S>                                             >c>         <C>       <C>        <C>      <C>                    
FIXED CHARGES:
  Interest on Long-Term Debt (1)                 $72,672     $66,247   $59,836   $69,174   $69,353
  Other Interest (2)                             $13,207      $9,640   $11,721    $9,113    $7,591
  Interest on Capital Lease Obligations (3)      $81,823     $83,019   $84,383   $83,986   $82,511
                                                 -------     -------   -------   -------   -------
TOTAL FIXED CHARGES                             $167,702    $158,906  $155,940  $162,273  $159,455



NET INCOME                                       $41,676     $83,572  $120,852   $54,905   $20,740

ADD (DEDUCT):
  Income Taxes - Operating Expense               $18,372     $19,297    $9,795    $8,920     ($91)
  Income Taxes - Other                             ($794)   ($41,401) ($91,950) ($29,356)  ($4,820)
  Total Fixed Charges                           $167,702    $158,906  $155,940  $162,273  $159,455
                                                --------    --------  --------  --------  ---------
TOTAL EARNINGS BEFORE TAXES
AND FIXED CHARGES                               $226,956    $220,374  $194,637  $196,742  $175,284



RATIO OF EARNINGS TO FIXED CHARGES                 1.353       1.387     1.248     1.212     1.099


(1)  Amounts have been restated for years ended 1996 and 1997 to conform to current year's
presentation.

(2)  Excludes recognition of Allowance for Borrowed Funds Used During Construction.

(3)  Capital Lease Interest Paid from Statement of Cash Flows.


</TABLE>


<PAGE>

































<PAGE>


                                                                Exhibit 21
                                                                                
                                                                                
                   UniSource Energy Corporation Subsidiaries
                                        
                                        
                                        
                                               State or Other Jurisdiction
       Subsidiary                           of Incorporation or Organization
       ----------                           --------------------------------

Tucson Electric Power Company (TEP)					   Arizona

   Subsidiaries of TEP
   -------------------
   Escavada Company                                    Arizona
   Sabino Investing Inc.                               Delaware
   San Carlos Resources Inc.                           Arizona
   Santa Cruz Resources Inc.                           Delaware
   Sierrita Resources Inc.                             Delaware
   Tucson Resources Inc.                               Delaware
   Tucsonel Inc.                                       Arizona


Millennium Energy Holdings, Inc.					   Arizona

   Subsidiaries of Millennium Energy Holdings, Inc.
   ---------------------------------------------------
   Advanced Energy Technologies, Inc.                  Arizona
   Biomasa Generacion, S. de R.L. de C.V.              Honduras
   COPESA											   Panama
   Global Solar Energy, L.L.C.                         Arizona
   Global Solar Energy International Holdings		   Cayman Islands
   Global Solar Energy Technologies					   Mauritius
   MEH Corporation									   Arizona	 
   Nations BioGen Ltd.                                 Cayman Islands
   Nations Curacao Ltd.								   Cayman Islands
   Nations ECK, L.L.C.								   Delaware
   Nations Energy Corporation                          Arizona
   Nations Energy Holland Holding B.V.                 Netherlands
   Nations International Ltd.                          Cayman Islands
   Nations Kladno B.V.                                 Netherlands
   Nations Kladno II B.V.                              Netherlands
   Nations-Colorado Energy Corporation		           Delaware
   Nations Panama Energy Corporation				   Panama 	
   NEV California, L.L.C.							   Arizona
   NEV East, L.L.C.									   Arizona
   NEV Midwest, L.L.C.								   Arizona
   NEV Southwest, L.L.C.							   Arizona
   NEV Technologies, L.L.C.							   Arizona
   NEVTech Americas, L.L.C.							   Arizona
   NEVTech Pacifica, L.L.C.							   Arizona
   NEV Texas, L.L.C.								   Arizona
   New Energy Ventures, Inc. 						   Arizona
   Productos de Concreto Internacionales,
      S. de R.L. de C.V.							   Mexico
   Sentinel Concrete Utility Poles, L.L.C.			   Arizona
   Southwest Energy Solutions, Inc.                    Arizona
   Suministradora de Materiales Organicos, 
      S.R.L. de C.V.								   Honduras
   SWPP International Ltd.                             Cayman Islands
   SWPP Investment Company                             Arizona




                                           Exhibit 23(a)



We hereby consent to the incorporation by reference in the
Registration Statements on Form S-8 (Nos. 333-43765, 333-
43767 and 333-43769, 333-53309, 333-53333 and 333-53337),
on Form S-3 (No. 333-31043), and on Form S-4 (No. 333-
60809) of UniSource Energy Corporation and in the
Amendment No. 1 to the Registration Statement on Form S-4
(No. 333-64143) of Tucson Electric Power Company of our
report dated February 5, 1999 appearing in this Annual
Report on Form 10-K. We also consent to the incorporation
by reference of our report dated March 30, 1999 on the
financial statements of New Energy Ventures, Inc.
appearing in this Annual Report on Form 10-K.



PricewaterhouseCoopers LLP
Los Angeles, California
March 30, 1999



                                               Exhibit 23(b)



INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in Post-Effective
Amendment No. 1 to Registration Statement No. 33-55732 of Tucson
Electric Power Company (TEP) on Form S-3, Registration Statement
No. 333-31043 of UniSource Energy Corporation (the Company) on
Form S-3, Registration Statement No. 333-60809 of the Company on
Form S-4, Amendment No. 2 to Registration Statement No. 333-65143
of TEP on Form S-4, and Registration Statement No. 333-43765,
No. 333-43767, No. 333-43769, No. 333-53309, No. 333-53333 and
No. 333-53337 of the Company on Form S-8 of our report dated
February 23, 1998 (March 11, 1999 as to information with respect
to 1997 and 1996 periods in Note 4 and in Note 12), appearing in
this Annual Report on Form 10-K of the Company and TEP for the
year ended December 31, 1998.


 DELOITTE & TOUCHE

Tucson, Arizona
March 30, 1999









                                                  EXHIBIT 24(a)



                       Power of Attorney


      KNOW  ALL  MEN  BY  THESE PRESENTS,  that  the  undersigned

Principal   Executive  Officer,  Principal   Financial   Officer,

Principal  Accounting  Officer,  officers  and/or  directors   of

UniSource  Energy  Corporation,  an  Arizona  corporation,  which

corporation  proposes  to file with the Securities  and  Exchange

Commission  an  Annual Report on Form 10-K  for  the  year  ended

December 31, 1998, under the Securities Exchange Act of 1934,  as

amended,  does  each for himself and not for one another,  hereby

constitute and appoint Ira R. Adler, Dennis R. Nelson  and  Karen

G.  Kissinger and each of them, his true and lawful attorneys, in

his  name,  place  and stead, to sign his name to  said  proposed

Annual  Report  on Form 10-K and any and all amendments  thereto,

and  to  cause  the  same  to be filed with  the  Securities  and

Exchange  Commission,  it  being intended  to  grant  and  hereby

granting  to  said attorneys, and each of them,  full  power  and

authority  to  do  and  perform any act and thing  necessary  and

proper to be done in the premises as fully and to all intents and

purposes  as the undersigned could do if personally present;  and

each  of the undersigned for himself hereby ratifies and confirms

all that said attorneys, or any one of them, shall lawfully do or

cause to be done by virtue hereof.

     IN WITNESS WHEREOF, each of the undersigned has hereunto set

their hand as of the 31st day of March, 1999.


/s/ James S. Pignatelli            /s/ Larry W. Bickle
_____________________________      _____________________________
James S. Pignatelli                Larry W. Bickle, Director
Principal Executive Officer
and Chairman of the Board of
Directors                          /s/ Elizabeth T. Bilby
                                   _____________________________
                                   Elizabeth T. Bilby, Director
/s/ Ira R. Adler
_____________________________
Ira R. Adler                       /s/ Harold W. Burlingame
Principal Financial Officer        _____________________________
and Director                       Harold W. Burlingame, Director


/s/ Karen G. Kissinger             /s/ Jose L. Canchola
_____________________________      _____________________________
Karen G. Kissinger                 Jose L. Canchola, Director
Principal Accounting Officer

                                   /s/ John L. Carter
                                   _____________________________
                                   John L. Carter, Director


                                   /s/ Daniel W. Fessler
                                   _____________________________
                                   Daniel W. Fessler, Director


                                   /s/ John A. Jeter
                                   _____________________________
                                   John A. Jeter, Director


                                   /s/ R. B. O'Rielly
                                   _____________________________
                                   R. B. O'Rielly, Director


                                   /s/ Martha R. Seger
                                   _____________________________
                                   Martha R. Seger, Director


                                   /s/ H. Wilson Sundt
                                   _____________________________
                                   H. Wilson Sundt, Director





                                                  EXHIBIT 24(b)



                       Power of Attorney


      KNOW  ALL  MEN  BY  THESE PRESENTS,  that  the  undersigned

Principal   Executive  Officer,  Principal   Financial   Officer,

Principal Accounting Officer, officers and/or directors of Tucson

Electric Power Company, an Arizona corporation, which corporation

proposes  to file with the Securities and Exchange Commission  an

Annual Report on Form 10-K for the year ended December 31,  1998,

under the Securities Exchange Act of 1934, as amended, does  each

for  himself  and  not  for one another,  hereby  constitute  and

appoint Ira R. Adler, Dennis R. Nelson and Karen G. Kissinger and

each  of them, his true and lawful attorneys, in his name,  place

and  stead,  to sign his name to said proposed Annual  Report  on

Form  10-K  and any and all amendments thereto, and to cause  the

same to be filed with the Securities and Exchange Commission,  it

being  intended  to grant and hereby granting to said  attorneys,

and  each of them, full power and authority to do and perform any

act and thing necessary and proper to be done in the premises  as

fully and to all intents and purposes as the undersigned could do

if  personally present; and each of the undersigned  for  himself

hereby ratifies and confirms all that said attorneys, or any  one

of them, shall lawfully do or cause to be done by virtue hereof.



     IN WITNESS WHEREOF, each of the undersigned has hereunto set

their hand as of the 31st day of March, 1999.




/s/ James S. Pignatelli            /s/ Elizabeth T. Bilby
_____________________________      _____________________________
James S. Pignatelli                Elizabeth T. Bilby, Director
Principal Executive Officer
and Chairman of the Board of
Directors                          /s/ Harold W. Burlingame
                                   _____________________________
                                   Harold W. Burlingame, Director
/s/ Ira R. Adler
_____________________________
Ira R. Adler                       /s/ John L. Carter
Principal Financial Officer        _____________________________
and Director                       John L. Carter, Director


/s/ Karen G. Kissinger             /s/ Daniel W. Fessler
_____________________________      _____________________________
Karen G. Kissinger                 Daniel W. Fessler, Director
Principal Accounting Officer

                                   /s/ John A. Jeter
                                   _____________________________
                                   John A. Jeter, Director


                                   /s/ Martha R. Seger
                                   _____________________________
                                   Martha R. Seger, Director



<TABLE> <S> <C>

                                         

<ARTICLE> UT
<CIK> 0000941138
<NAME> UNISOURCE ENERGY CORPORATION
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,915,590
<OTHER-PROPERTY-AND-INVEST>                    110,318
<TOTAL-CURRENT-ASSETS>                         294,744
<TOTAL-DEFERRED-CHARGES>                       313,528
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,634,180
<COMMON>                                       640,640
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (393,994)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 246,646
                                0
                                          0
<LONG-TERM-DEBT-NET>                         1,184,423
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                    1,725
                            0
<CAPITAL-LEASE-OBLIGATIONS>                    889,543
<LEASES-CURRENT>                                11,647
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 300,196
<TOT-CAPITALIZATION-AND-LIAB>                2,634,180
<GROSS-OPERATING-REVENUE>                      768,676
<INCOME-TAX-EXPENSE>                            18,372
<OTHER-OPERATING-EXPENSES>                     615,116
<TOTAL-OPERATING-EXPENSES>                     633,488
<OPERATING-INCOME-LOSS>                        135,188
<OTHER-INCOME-NET>                              10,444
<INCOME-BEFORE-INTEREST-EXPEN>                 145,632
<TOTAL-INTEREST-EXPENSE>                       117,600
<NET-INCOME>                                    28,032
                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   28,032
<COMMON-STOCK-DIVIDENDS>                             0
<TOTAL-INTEREST-ON-BONDS>                       72,672
<CASH-FLOW-OPERATIONS>                         162,745
<EPS-PRIMARY>                                     0.87
<EPS-DILUTED>                                     0.87
        



</TABLE>

<TABLE> <S> <C>

                                         

<ARTICLE> UT
<CIK> 0000100122
<NAME> TUCSON ELECTRIC POWER COMPANY
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,915,590
<OTHER-PROPERTY-AND-INVEST>                     62,978
<TOTAL-CURRENT-ASSETS>                         257,025
<TOTAL-DEFERRED-CHARGES>                       313,528
<OTHER-ASSETS>                                  79,462     
<TOTAL-ASSETS>                               2,628,583
<COMMON>                                       640,211
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (410,350)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 229,861
                                0
                                          0
<LONG-TERM-DEBT-NET>                         1,184,423
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                    1,725
                            0
<CAPITAL-LEASE-OBLIGATIONS>                    889,543
<LEASES-CURRENT>                                11,647
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 311,384
<TOT-CAPITALIZATION-AND-LIAB>                2,628,583
<GROSS-OPERATING-REVENUE>                      768,990
<INCOME-TAX-EXPENSE>                            18,372
<OTHER-OPERATING-EXPENSES>                     615,116
<TOTAL-OPERATING-EXPENSES>                     633,488
<OPERATING-INCOME-LOSS>                        135,502
<OTHER-INCOME-NET>                              23,774
<INCOME-BEFORE-INTEREST-EXPEN>                 159,276
<TOTAL-INTEREST-EXPENSE>                       117,600
<NET-INCOME>                                    41,676
                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   41,676
<COMMON-STOCK-DIVIDENDS>                        30,000
<TOTAL-INTEREST-ON-BONDS>                       72,672
<CASH-FLOW-OPERATIONS>                         181,858
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        



</TABLE>


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