FORM 10-Q
                       Securities and Exchange Commission
                             Washington, D.C. 20549

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

     For the quarterly period ended June 30, 1999

                                       OR

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

     For the transition period from ______________ to ______________

                          Commission file number 1-8962

                        PINNACLE WEST CAPITAL CORPORATION
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)

           Arizona                                               86-0512431
- -------------------------------                              -------------------
(State or other jurisdiction of                               (I.R.S. Employer
 incorporation or organization)                              Identification No.)

400 E. Van Buren St., P.O. Box 52132, Phoenix, Arizona           85072-2132
- ------------------------------------------------------           ----------
      (Address of principal executive offices)                   (Zip Code)

Registrant's telephone number, including area code:               (602) 379-2500

              ----------------------------------------------------
              (Former name, former address and former fiscal year,
                          if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                               Yes [X]    No [ ]

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

                 Number of shares of common stock, no par value,
                 outstanding as of August 12, 1999: 84,764,309

                                    Glossary

ACC - Arizona Corporation Commission

ACC Staff - Staff of the Arizona Corporation Commission

APS - Arizona Public Service Company

APS  Energy  Services - APS  Energy  Services  Company,  Inc.,  a direct  access
electricity provider

Company - Pinnacle West Capital Corporation

DOE - United States Department of Energy

EITF - Emerging Issues Task Force

EITF 97-4 - Emerging  Issues Task Force  Issue No.  97-4,  "Deregulation  of the
Pricing of Electricity -- Issues Related to the  Applications of FASB Statements
No. 71, Accounting for the Effects of Certain Types of Regulation,  and No. 101,
Regulated  Enterprises -- Accounting for the  Discontinuation  of Application of
FASB Statement No. 71"

El Dorado - El Dorado Investment Company

EPA - Environmental Protection Agency

FASB - Financial Accounting Standards Board

FERC - Federal Energy Regulatory Commission

ITC - Investment tax credit

March 10-Q - Pinnacle West Capital Corporation Quarterly Report on Form 10-Q for
the fiscal quarter ended March 31, 1999

1998 10-K - Pinnacle West Capital Corporation Annual Report on Form 10-K for the
fiscal year ended December 31, 1998

MW - Megawatt, one million watts

Palo Verde - Palo Verde Nuclear Generating Station

Pinnacle West - Pinnacle West Capital Corporation

Power Coordination Agreement - 1955 agreement between the Company and Salt River
Project that provides for certain electric system and power sales

SFAS No. 71 - Statement of Financial  Accounting  Standards No. 71,  "Accounting
for the Effects of Certain Types of Regulation"


                                       -2-

SFAS No. 133 - Statement of Financial  Accounting Standards No. 133, "Accounting
for Derivative Instruments and Hedging Activities"

Salt  River  Project - Salt River  Project  Agricultural  Improvement  and Power
District

SunCor - SunCor Development Company

Territorial  Agreement  - 1955  agreement  between  the  Company  and Salt River
Project that has provided  exclusive  retail service  territories in Arizona for
each party

                                       -3-

                          PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

                        PINNACLE WEST CAPITAL CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                                   (Unaudited)
                (Dollars in thousands, except per share amounts)

                                                        Three Months Ended
                                                             June 30,
                                                   ----------------------------
                                                       1999            1998
                                                   ------------    ------------
Operating Revenues
  Electric                                         $    511,434    $    441,715
  Real estate                                            32,697          28,916
                                                   ------------    ------------
Total                                                   544,131         470,631
                                                   ------------    ------------
Operating Expenses
  Fuel and purchased power                              132,543          95,585
  Utility operations and maintenance                    106,234         102,713
  Real estate operations                                 29,401          26,213
  Depreciation and amortization                          97,383          93,585
  Taxes other than income taxes                          29,602          29,930
                                                   ------------    ------------
Total                                                   395,163         348,026
                                                   ------------    ------------
Operating Income                                        148,968         122,605
                                                   ------------    ------------
Other Income (Expense)
  Preferred stock dividend requirements of APS               --          (2,435)
  Net other income and expense                              399             192
                                                   ------------    ------------
Total                                                       399          (2,243)
                                                   ------------    ------------
Income Before Interest and Income Taxes                 149,367         120,362
                                                   ------------    ------------
Interest Expense
  Interest charges                                       41,105          42,441
  Capitalized interest                                   (4,189)         (4,874)
                                                   ------------    ------------
Total                                                    36,916          37,567
                                                   ------------    ------------
Income Before Income Taxes                              112,451          82,795
Income Taxes                                             43,749          33,798
                                                   ------------    ------------
Net Income                                         $     68,702    $     48,997
                                                   ============    ============
Average Common Shares Outstanding - Basic            84,716,175      84,810,790

Average Common Shares Outstanding  - Diluted         85,093,421      85,416,069

Earnings Per Average Common Share Outstanding
  Net income - basic                               $       0.81    $       0.58
  Net income - diluted                             $       0.81    $       0.57

Dividends Declared Per Share                       $       0.65    $       0.60
                                                   ============    ============

See Notes to Condensed Consolidated Financial Statements.

                                       -4-

                        PINNACLE WEST CAPITAL CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                                   (Unaudited)
                (Dollars in thousands, except per share amounts)

                                                         Six Months Ended
                                                             June 30,
                                                   ----------------------------
                                                       1999            1998
                                                   ------------    ------------
Operating Revenues
  Electric                                         $    925,417    $    822,138
  Real estate                                            57,230          63,077
                                                   ------------    ------------
Total                                                   982,647         885,215
                                                   ------------    ------------
Operating Expenses
  Fuel and purchased power                              231,784         169,502
  Utility operations and maintenance                    205,318         199,129
  Real estate operations                                 51,636          56,449
  Depreciation and amortization                         194,293         186,415
  Taxes other than income taxes                          59,049          60,278
                                                   ------------    ------------
Total                                                   742,080         671,773
                                                   ------------    ------------
Operating Income                                        240,567         213,442
                                                   ------------    ------------
Other Income (Expense)
  Preferred stock dividend requirements of APS           (1,016)         (5,313)
  Net other income and expense                           (1,938)          4,551
                                                   ------------    ------------
Total                                                    (2,954)           (762)
                                                   ------------    ------------
Income Before Interest and Income Taxes                 237,613         212,680
                                                   ------------    ------------
Interest Expense
  Interest charges                                       81,874          85,363
  Capitalized interest                                   (8,263)         (9,530)
                                                   ------------    ------------
Total                                                    73,611          75,833
                                                   ------------    ------------
Income Before Income Taxes                              164,002         136,847
Income Taxes                                             64,610          56,764
                                                   ------------    ------------
Net Income                                         $     99,392    $     80,083
                                                   ============    ============
Average Common Shares Outstanding - Basic            84,693,115      84,798,120

Average Common Shares Outstanding - Diluted          85,135,423      85,375,609

Earnings Per Average Common Share Outstanding
  Net income - basic                               $       1.17    $       0.94
  Net income - diluted                             $       1.17    $       0.94

Dividends Declared Per Share                       $      0.975    $       0.90
                                                   ============    ============

See Notes to Condensed Consolidated Financial Statements.

                                       -5-

                        PINNACLE WEST CAPITAL CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                                   (Unaudited)
                (Dollars in thousands, except per share amounts)

                                                       Twelve Months Ended
                                                             June 30,
                                                   ----------------------------
                                                       1999            1998
                                                   ------------    ------------
Operating Revenues
  Electric                                         $  2,109,677    $  1,862,919
  Real estate                                           118,341         129,841
                                                   ------------    ------------
Total                                                 2,228,018       1,992,760
                                                   ------------    ------------
Operating Expenses
  Fuel and purchased power                              599,783         421,350
  Utility operations and maintenance                    420,230         421,385
  Real estate operations                                110,518         120,014
  Depreciation and amortization                         387,557         370,289
  Taxes other than income taxes                         115,677         121,269
                                                   ------------    ------------
Total                                                 1,633,765       1,454,307
                                                   ------------    ------------
Operating Income                                        594,253         538,453
                                                   ------------    ------------
Other Income (Expense)
  Preferred stock dividend requirements of APS           (5,406)        (11,295)
  Net other income and expense                           (5,880)             74
                                                   ------------    ------------
Total                                                   (11,286)        (11,221)
                                                   ------------    ------------
Income Before Interest and Income Taxes                 582,967         527,232
                                                   ------------    ------------
Interest Expense
  Interest charges                                      165,656         176,207
  Capitalized interest                                  (17,329)        (19,223)
                                                   ------------    ------------
Total                                                   148,327         156,984
                                                   ------------    ------------
Income Before Income Taxes                              434,640         370,248
Income Taxes                                            172,439         146,873
                                                   ------------    ------------
Net Income                                         $    262,201    $    223,375
                                                   ============    ============
Average Common Shares Outstanding - Basic            84,722,147      84,767,601

Average Common Shares Outstanding - Diluted         85,232,428      85,298,571

Earnings Per Average Common Share Outstanding
  Net income - basic                               $       3.09    $       2.64
  Net income - diluted                             $       3.08    $       2.62

Dividends Declared Per Share                       $       1.30    $       1.20
                                                   ============    ============

See Notes to Condensed Consolidated Financial Statements.

                                       -6-

                        PINNACLE WEST CAPITAL CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEETS

                                     ASSETS
                             (Thousands of Dollars)

                                                         June 30,   December 31,
                                                           1999        1998
                                                        (Unaudited)
                                                        ----------   ----------
Current Assets
  Cash and cash equivalents                             $   32,511   $   20,538
  Customer and other receivables--net                      185,701      233,876
  Accrued utility revenues                                  98,046       67,740
  Materials and supplies                                    70,919       69,074
  Fossil fuel                                               17,786       13,978
  Deferred income taxes                                      4,058        3,999
  Other current assets                                      55,923       47,594
                                                        ----------   ----------
    Total current assets                                   464,944      456,799
                                                        ----------   ----------
Investments and Other Assets
  Real estate investments--net                             335,977      331,021
  Other assets                                             262,586      236,562
                                                        ----------   ----------
    Total investments and other assets                     598,563      567,583
                                                        ----------   ----------
Utility Plant
  Electric plant in service and held for future use      7,370,852    7,265,604
  Less accumulated depreciation and amortization         2,941,878    2,814,762
                                                        ----------   ----------
    Total                                                4,428,974    4,450,842
  Construction work in progress                            247,910      228,643
  Nuclear fuel, net of amortization                         50,446       51,078
                                                        ----------   ----------
    Net utility plant                                    4,727,330    4,730,563
                                                        ----------   ----------
Deferred Debits
  Regulatory asset for income taxes                        373,417      400,795
  Rate synchronization cost deferral                       276,055      303,660
  Other deferred debits                                    363,912      365,146
                                                        ----------   ----------
    Total deferred debits                                1,013,384    1,069,601
                                                        ----------   ----------
Total Assets                                            $6,804,221   $6,824,546
                                                        ==========   ==========

See Notes to Condensed Consolidated Financial Statements.

                                       -7-

                        PINNACLE WEST CAPITAL CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEETS

                             LIABILITIES AND EQUITY
                             (Thousands of Dollars)

                                                        June 30,    December 31,
                                                          1999          1998
                                                       (Unaudited)
                                                       ----------    ----------
Current Liabilities
  Accounts payable                                     $  127,791    $  155,800
  Accrued taxes                                           158,195        62,520
  Accrued interest                                         32,972        31,866
  Dividends payable                                        27,552            --
  Short-term borrowings                                   223,950       178,830
  Current maturities of long-term debt                     17,810       168,045
  Customer deposits                                        25,943        28,510
  Other current liabilities                                 5,806        14,632
                                                       ----------    ----------
    Total current liabilities                             620,019       640,203
                                                       ----------    ----------
Long-Term Debt Less Current Maturities                  2,164,459     2,048,961
                                                       ----------    ----------
Deferred Credits and Other
  Deferred income taxes                                 1,319,340     1,343,536
  Deferred investment tax credit                           19,672        27,345
  Unamortized gain - sale of utility plant                 75,499        77,787
  Other                                                   435,351       428,122
                                                       ----------    ----------
    Total deferred credits and other                    1,849,862     1,876,790
                                                       ----------    ----------
Commitments and contingencies (Notes 5, 6, 9 and 10)

Minority Interests
  Non-redeemable preferred stock of APS                        --        85,840
                                                       ----------    ----------
  Redeemable preferred stock of APS                            --         9,401
                                                       ----------    ----------
Common Stock Equity
  Common stock, no par value                            1,540,437     1,550,643
  Retained earnings                                       629,444       612,708
                                                       ----------    ----------
    Total common stock equity                           2,169,881     2,163,351
                                                       ----------    ----------
Total Liabilities and Equity                           $6,804,221    $6,824,546
                                                       ==========    ==========

See Notes to Condensed Consolidated Financial Statements.

                                       -8-

                        PINNACLE WEST CAPITAL CORPORATION
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                             (THOUSANDS OF DOLLARS)

                                                           Six Months Ended
                                                                June 30,
                                                         ----------------------
                                                           1999         1998
                                                         ---------    ---------
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income                                               $  99,392    $  80,083
  Items not requiring cash
    Depreciation and amortization                          194,293      186,415
    Nuclear fuel amortization                               15,673       16,580
    Deferred income taxes--net                             (21,477)       5,645
    Deferred investment tax credit                          (7,673)      (7,895)
    Other--net                                               1,096          782
  Changes in current assets and liabilities
    Customer and other receivables--net                     48,175       12,544
    Accrued utility revenues                               (30,306)      (8,363)
    Materials, supplies and fossil fuel                     (5,653)      (8,912)
    Other current assets                                    (8,329)      (5,314)
    Accounts payable                                       (25,465)     (12,438)
    Accrued taxes                                           95,675       (8,081)
    Accrued interest                                         1,106         (349)
    Other current liabilities                               (5,307)       5,339
  Decrease (increase) in land held                          (4,642)      15,084
  Other--net                                               (16,382)      (7,364)
                                                         ---------    ---------
Net Cash Flow Provided By Operating Activities             330,176      263,756
                                                         ---------    ---------
CASH FLOWS FROM INVESTING ACTIVITIES
  Capital expenditures                                    (153,730)    (144,580)
  Capitalized interest                                      (8,263)      (9,530)
  Other--net                                                 1,282       15,485
                                                         ---------    ---------
Net Cash Flow Used For Investing Activities               (160,711)    (138,625)
                                                         ---------    ---------
CASH FLOWS FROM FINANCING ACTIVITIES
  Issuance of long-term debt                               193,691       99,375
  Short-term borrowings--net                                45,120       82,735
  Dividends paid on common stock                           (55,101)     (50,878)
  Repayment of long-term debt                             (235,755)    (220,782)
  Redemption of preferred stock                            (96,499)     (31,209)
  Other--net                                                (8,948)        (215)
                                                         ---------    ---------
Net Cash Flow Used For Financing Activities               (157,492)    (120,974)
                                                         ---------    ---------
Net Cash Flow                                               11,973        4,157
Cash and Cash Equivalents at Beginning of Period            20,538       27,484
                                                         =========    =========
Cash and Cash Equivalents at End of Period               $  32,511    $  31,641
                                                         =========    =========
Supplemental Disclosure of Cash Flow Information:
  Cash paid during the period for:
    Interest, net of amounts capitalized                 $  68,341    $  72,863
    Income taxes                                         $     940    $  64,820

See Notes to Condensed Consolidated Financial Statements.

                                       -9-

                        PINNACLE WEST CAPITAL CORPORATION

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. The  condensed  consolidated  financial  statements  include the  accounts of
Pinnacle  West and its  subsidiaries:  APS,  Suncor,  El Dorado,  and APS Energy
Services.  All significant  intercompany balances have been eliminated.  We have
reclassified  certain  prior  year  amounts  to  conform  to  the  current  year
presentation.

2.  Our  unaudited  condensed  consolidated  financial  statements  reflect  all
adjustments  which we believe are  necessary  for the fair  presentation  of our
financial  position and results of operations for the periods  presented.  These
adjustments are of a normal  recurring  nature.  We suggest that these condensed
consolidated  financial statements and notes to condensed consolidated financial
statements be read along with the consolidated financial statements and notes to
consolidated financial statements included in our 1998 10-K.

3. Weather  conditions can have a significant impact on APS' results for interim
periods.  For this  and  other  reasons,  results  for  interim  periods  do not
necessarily represent results to be expected for the year.

4. See  "Liquidity  and Capital  Resources" in Part I, Item 2 of this report for
changes in capitalization for the six months ended June 30, 1999.

5. Regulatory Accounting

APS prepares its financial  statements in accordance with Statement of Financial
Accounting Standards (SFAS) No. 71, "Accounting for the Effects of Certain Types
of Regulation." SFAS No. 71 requires a cost-based,  rate-regulated enterprise to
reflect the impact of  regulatory  decisions in its financial  statements.  APS'
existing  regulatory orders and the current regulatory  environment  support its
accounting  practices related to regulatory assets, which amounted to about $850
million at June 30, 1999. Under the 1996 regulatory  agreement (see Note 7), the
ACC accelerated the amortization of substantially  all of APS' regulatory assets
to an eight-year period that will end June 30, 2004.

During 1997, the Emerging  Issues Task Force (EITF) of the Financial  Accounting
Standards  Board (FASB) issued EITF 97-4. EITF 97-4 requires that SFAS No. 71 be
discontinued no later than when  legislation is passed or a rate order is issued
that  contains  sufficient  detail to determine its effect on the portion of the
business being  deregulated,  which could result in write-downs or write-offs of
physical  and/or  regulatory  assets.  Additionally,  the EITF  determined  that
regulatory  assets should not be written off if they are to be recovered  from a
portion of the entity which continues to apply SFAS No. 71.

                                      -10-

Although rules have been proposed for the  transition of generation  services to
competition,  there are many unresolved  issues. APS continues to apply SFAS No.
71 to its  generation  operations.  If rate recovery of regulatory  assets is no
longer probable,  whether due to competition or regulatory  action, APS would be
required  to write  off the  remaining  balance  as an  extraordinary  charge to
expense.  See Note 6 for a discussion of a proposed settlement  agreement which,
if approved,  would result in the  discontinuation of SFAS No. 71 for generation
operations.

6. Regulatory Matters -- Electric Industry Restructuring

STATE

     PROPOSED  SETTLEMENT  AGREEMENT  As of May 14,  1999,  APS  entered  into a
comprehensive  Settlement  Agreement  with  various  other  parties,   including
representatives  of major  consumer  groups,  related to the  implementation  of
retail electric competition. Hearings before the ACC on the Settlement Agreement
ended  in  July  1999,  and a final  ACC  order,  which  is a  condition  to the
agreement's  effectiveness,  has  not  yet  been  issued.  By the  terms  of the
Settlement Agreement,  unless ACC approval has been obtained on or before August
1, 1999, each party has the right to  unilaterally  withdraw from the Settlement
Agreement. To date, no party has elected to withdraw.

The following are the major provisions of the Settlement Agreement:

*    APS will reduce rates for standard  offer service for customers  with loads
     less  than 3  megawatts  in a series  of  annual  rate  reductions  of 1.5%
     beginning July 1, 1999 through July 1, 2003, for a total of 7.5%. The first
     reduction  includes the July 1, 1999 retail price  decrease  related to the
     1996  regulatory  agreement.  See  Note 7.  For  customers  having  loads 3
     megawatts  or  greater,  standard  offer  rates  will be  reduced in annual
     increments that total 5% through 2002.

*    Unbundled rates being charged by APS for competitive  direct access service
     (for example,  distribution  services) will become  effective as of July 1,
     1999,  and will be subject to annual  reductions,  that vary by rate class,
     through 2003.

*    There will be a moratorium  on retail rate  changes for standard  offer and
     unbundled  competitive  direct access rates until July 1, 2004,  except for
     the  price   reductions   described   above  and  certain   other   limited
     circumstances.

*    APS will be permitted to defer for later  recovery  prudent and  reasonable
     costs of complying with the ACC electric competition rules, system benefits
     costs in  excess  of the  levels  included  in  current  rates,  and  costs
     associated   with  APS'  "provider  of  last  resort"  and  standard  offer
     obligations for service after July 1, 2004. These costs are to be recovered
     through an adjustment clause or clauses commencing on July 1, 2004.

                                      -11-

*    APS'  distribution  system will be open for retail  access upon approval of
     the Settlement  Agreement.  Customers will be eligible for retail access in
     accordance with the phase-in program  expected to be ultimately  adopted by
     the ACC  under the  electric  competition  rules  when  such  rules  become
     effective,  with an  additional  140  megawatts  being  made  available  to
     eligible   non-residential   customers.   Unless  subject  to  judicial  or
     regulatory  restraint,  APS will  open its  distribution  system  to retail
     access for all customers on January 1, 2001.

*    APS is currently  recovering  substantially  all of its  regulatory  assets
     through July 1, 2004, pursuant to the 1996 regulatory  agreement.  See Note
     7. In addition,  the Settlement  Agreement states that APS has demonstrated
     that its  allowable  stranded  costs,  after  mitigation  and  exclusive of
     regulatory  assets,  are at least $533 million net present value.  APS will
     not be allowed to  recover  $183  million  net  present  value of the above
     amounts.   The  Settlement  Agreement  provides  that  APS  will  have  the
     opportunity to recover $350 million net present value through a competitive
     transition  charge  (CTC) that will remain in effect  through  December 31,
     2004,  at which time it will  terminate.  Any  over/under-recovery  will be
     credited/debited against the costs subject to recovery under the adjustment
     clause described above.

*    APS will form a separate  corporate  affiliate or  affiliates  and transfer
     thereto its  generating  assets and  competitive  services by December  31,
     2002.

*    Upon final approval of the  Settlement  Agreement by the ACC in an order no
     longer  subject to  judicial  review,  APS will move to dismiss  all of its
     litigation  pending  against  the  ACC as of  the  date  of the  Settlement
     Agreement.

Upon final ACC order,  APS will  discontinue  the  application  of  Statement of
Financial  Accounting  Standards No. 71,  "Accounting for the Effects of Certain
Types of Regulation," for its generation operations.  This means that regulatory
assets,  unless  reestablished  as recoverable  through  ongoing  regulated cash
flows,  are to be  eliminated  and the  generation  assets  must be  tested  for
impairment.  The  regulatory  disallowance,  which removes $234 million  pre-tax
($183 million net present  value) from ongoing  regulatory  cash flows,  will be
recorded  as a net  reduction  of  regulatory  assets.  This  reduction  will be
reported as an  extraordinary  charge on the income  statement.  The  regulatory
assets to be recovered  under this  Settlement  Agreement  would be amortized as
follows:

                                   (Millions)

                                                          1/1 - 6/30
  1999       2000        2001        2002        2003        2004        Total
- --------   --------    --------    --------    --------    --------     --------
  $164       $158        $145        $115         $86         $18         $686

                                      -12-

     PROPOSED  RETAIL  ELECTRIC  COMPETITION  RULES In  December  1996,  the ACC
adopted rules that provide a framework for the  introduction  of retail electric
competition in Arizona. The ACC adopted certain  modifications to these rules on
August 10, 1998,  and on December 11, 1998,  the ACC adopted the amended  rules,
without  any  modifications  that would have a  significant  impact on APS, on a
permanent  basis.  We believe that certain  provisions of the 1996 ACC rules and
the amended rules are deficient and APS has filed  lawsuits to protect its legal
rights  regarding  the 1996 rules and the  amended  rules.  These  lawsuits  are
pending  but two  related  cases filed by other  utilities  have been  partially
decided in a manner adverse to those utilities' positions.

On January 11,  1999,  the ACC issued an order which  stayed the amended  rules,
granted  reconsideration  of the  decision  to make  the  rules  permanent,  and
directed the hearing  division of the ACC to  establish a  procedural  order for
further action on these rules.  The order also granted  waivers from  compliance
with the rules for APS, and all affected utilities.

On February 5, 1999, the ACC Hearing Division issued recommendations for changes
to the amended rules. The recommended  changes to the amended rules were further
modified by a Procedural Order of the ACC Hearing Division dated March 12, 1999.
On April 14, 1999, the ACC voted to notice, for further rulemaking,  the Hearing
Division's  recommended changes, with certain exceptions (the "Proposed Rules").
The  Proposed  Rules  approved  by the ACC for  further  rulemaking  include the
following major provisions:

*    They would apply to virtually all Arizona electric  utilities  regulated by
     the ACC, including APS.

*    The Proposed  Rules require each affected  utility,  including APS, to make
     available  at  least  20%  of  its  1995  system  retail  peak  demand  for
     competitive generation supply beginning when the ACC makes a final decision
     on each utility's  stranded costs and unbundled rates (Final Decision Date)
     or January 1, 2001,  whichever is earlier,  and 100%  beginning  January 1,
     2001.

*    Subject to the 20% requirement,  all utility  customers with single premise
     loads of one megawatt or greater will be eligible for competitive  electric
     services on the Final Decision Date. Customers with single premise loads of
     40  kilowatts  or greater  may  aggregate  loads to meet this one  megawatt
     requirement.

*    When  effective,  residential  customers  will be  phased  in at 1 1/4% per
     quarter  calculated  beginning  on  January  1,  1999,  subject  to the 20%
     requirement above.

*    Electric  service  providers  that  get  Certificates  of  Convenience  and
     Necessity  (CC&Ns)  from  the ACC can  supply  only  competitive  services,
     including   electric   generation,   but  not  electric   transmission  and
     distribution.

                                      -13-

*    Affected utilities must file ACC tariffs with separate pricing for electric
     services provided for noncompetitive services.

*    The ACC shall allow a reasonable  opportunity  for recovery of  unmitigated
     stranded costs (see "Stranded Costs" below).

*    Absent an ACC waiver,  prior to January 1, 2001, each affected utility must
     transfer  all  competitive  generation  assets  and  services  either to an
     unaffiliated party or to a separate corporate affiliate.

The Proposed Rules will not become final and effective until approved by the ACC
following formal  rulemaking  proceedings  under Arizona law. In compliance with
statutory procedural requirements,  ACC oral proceedings on the matter were held
in June 1999, and a final order has not yet been issued.

We cannot currently predict when or if the Proposed Rules will become effective,
when or if the stay of the amended rules will be lifted, or when retail electric
competition will be introduced in Arizona. See "Proposed  Settlement  Agreement"
above for  discussion of APS'  proposals  regarding the  introduction  of retail
electric competition in Arizona.

     STRANDED  COSTS On June 22, 1998,  the ACC issued an Order on stranded cost
determination and recovery. APS believes that certain provisions of the stranded
cost order are deficient  and in August 1998,  APS filed two lawsuits to protect
its legal rights relating to the order.

On February 5, 1999, the ACC Hearing Division issued recommended  changes to the
June 1998 stranded cost order. These recommended changes were further amended by
an ACC  Procedural  Order dated March 12, 1999. On April 14, 1999, the ACC voted
to adopt the Hearing  Division's  changes to the June 1998  stranded cost order.
The amended  stranded cost order became  effective on April 27, 1999, and allows
each affected utility to choose from any one of five options for the recovery of
stranded costs:

*    Net Revenues Lost Methodology is the difference between generation revenues
     under  traditional  regulation and generation  revenues under  competition.
     This option provides for declining recovery  percentages for stranded costs
     over a  five-year  recovery  period.  Regulatory  assets  are  to be  fully
     recovered  under  their  presently  authorized  amortization  schedule.  In
     accordance  with a 1996  regulatory  agreement,  the  ACC  accelerated  the
     amortization  of  substantially   all  of  APS'  regulatory  assets  to  an
     eight-year period that ends June 30, 2004.

*    Divestiture/Auction   Methodology   allows  a  utility  to  divest  all  or
     substantially  all of its generating  assets,  including  regulatory assets
     associated  with  generation,  in  order  to  collect  100  percent  of the
     difference  between  net sales  price and book value of  generating  assets
     divested over a ten-year period, with no return on the unamortized balance.

                                      -14-

*    Financial Integrity  Methodology allows a utility  "sufficient  revenues to
     meet minimum financial ratios" for a period of ten years.

*    Settlement Methodology allows a settlement to be agreed upon by the ACC and
     a utility.

*    Any  combination of the above,  if shown to be in the best interests of all
     affected parties.

See "Proposed  Settlement  Agreement" above, for a discussion of the methodology
APS proposed.

     LEGISLATIVE  INITIATIVES  An Arizona joint  legislative  committee  studied
electric utility industry  restructuring issues in 1996 and 1997. In conjunction
with that study, the Arizona legislative counsel prepared memoranda in late 1997
related to the legal  authority of the ACC to  deregulate  the Arizona  electric
utility  industry.  The memoranda raise a question as to the degree to which the
ACC may, under the Arizona Constitution,  deregulate any portion of the electric
utility industry and allow rates to be determined by market forces.  This latter
issue has been subsequently  decided by lower courts in favor of the ACC in four
separate lawsuits, two of which are unrelated.

In May 1998, a law was enacted to facilitate  implementation  of retail electric
competition in Arizona. The law includes the following major provisions:

*    Arizona's largest government-operated electric utility (Salt River Project)
     and, at their option,  smaller municipal  electric systems must (i) make at
     least 20% of their 1995 retail peak demand  available  to electric  service
     providers by December 31, 1998 and for all retail customers by December 31,
     2000; (ii) decrease rates by at least 10% over a ten-year period  beginning
     as  early as  January  1,  1991;  (iii)  implement  procedures  and  public
     processes   comparable  to  those  already  applicable  to  public  service
     corporations  for  establishing  the  terms,  conditions,  and  pricing  of
     electric  services  as well as certain  other  decisions  affecting  retail
     electric competition;

*    describes the factors which form the basis of  consideration  by Salt River
     Project in determining stranded costs; and

*    metering and meter reading services must be provided on a competitive basis
     during the first two years of competition only for customers having demands
     in excess of one megawatt (and that are eligible for competitive generation
     services),  and thereafter for all customers receiving competitive electric
     generation.

In addition,  the Arizona  legislature will review and make  recommendations for
the 1999 legislative session on certain competitive issues.

                                      -15-

     GENERAL  Until  the  manner of  implementation  of  competition,  including
addressing  stranded  costs,  is determined,  we cannot  accurately  predict the
impact of full retail  competition  on our financial  position,  cash flows,  or
results of  operation.  As  competition  in the electric  industry  continues to
evolve,  we will  continue to evaluate  strategies  and  alternatives  that will
position  us to  compete  in  the  new  regulatory  environment.  See  "Proposed
Settlement Agreement" above.

FEDERAL  The  Energy  Policy  Act of 1992 and  recent  rulemakings  by FERC have
promoted increased competition in the wholesale electric power markets. APS does
not expect these rules to have a material impact on its financial statements.

Several  electric  utility  industry  restructuring  bills have been  introduced
during the 106th Congress. Several of these bills are written to allow consumers
to choose their electricity suppliers beginning in 2000 and beyond. These bills,
other bills that are expected to be introduced,  and ongoing  discussions at the
federal  level  suggest a wide  range of opinion  that will need to be  narrowed
before any substantial restructuring of the electric utility industry can occur.

7. 1996 Regulatory Agreement

In April 1996, the ACC approved a regulatory agreement between the ACC Staff and
APS. The major provisions of this agreement are:

*    An annual rate reduction of approximately  $48.5 million ($29 million after
     income taxes), or 3.4% on average for all customers except certain contract
     customers, effective July 1, 1996.

*    Recovery of  substantially  all of APS' present  regulatory  assets through
     accelerated  amortization  over an eight-year period that will end June 30,
     2004,  increasing  annual  amortization by approximately  $120 million ($72
     million after income taxes).

*    A  formula  for  sharing   future  cost  savings   between   customers  and
     shareholders (price reduction formula),  referencing a return on equity (as
     defined) of 11.25%.

*    A moratorium  on filing for  permanent  rate changes prior to July 2, 1999,
     except under the price  reduction  formula and under  certain other limited
     circumstances.

*    Infusion of $200 million of common  equity into APS by the parent  company,
     in annual payments of $50 million starting in 1996.

Based on the price reduction formula, the ACC approved retail price decreases of
approximately  $17.6  million  ($10.5  million  after  income  taxes),  or 1.2%,
effective July 1, 1997, and  approximately $17 million ($10 million after income
taxes), or 1.1%, effective July 1, 1998. In May 1999, APS filed with the ACC for
another  retail price  decrease of  approximately  $10.8 million  annually ($6.5
million after income  taxes),  which would become  effective as of July 1, 1999.
The amount and timing of the price  decrease are subject to ACC  approval.  This
will be the last price decrease under the 1996 regulatory

                                      -16-

agreement  and will be included in the first rate  reduction  under the proposed
Settlement  Agreement discussed in Note 6. See "Proposed  Settlement  Agreement"
above for a discussion of the price decrease.

8. Agreement with Salt River Project

On April 25, 1998,  APS entered into a Memorandum  of Agreement  with Salt River
Project  in  anticipation  of, and to  facilitate,  the  opening of the  Arizona
electric industry. The Agreement contains the following major components:

*    Both parties  amended the  Territorial  Agreement to remove any barriers in
     that  agreement to the  provision  of  competitive  electricity  supply and
     non-distribution services.

*    Both  parties  would amend the Power  Coordination  Agreement  to lower the
     price  that  APS  will  pay  Salt  River  Project  for  purchased  power by
     approximately  $17  million  (pretax)  during  the first full year that the
     Agreement is effective and by lesser annual  amounts  during the next seven
     years.

*    Both parties agreed on certain  legislative  positions  regarding  electric
     utility restructuring at the state and federal level.

Certain provisions of the Agreement  (including those relating to the amendments
of the Territorial Agreement and the Power Coordination  Agreement) are affected
by the timing of the  introduction of  competition.  See Note 6. On February 18,
1999, the ACC approved the Agreement.

9. Nuclear Insurance

The Palo  Verde  participants  have  insurance  for  public  liability  payments
resulting  from  nuclear  energy  hazards to the full limit of  liability  under
federal law. This potential  liability is covered by primary liability insurance
provided by commercial  insurance carriers in the amount of $200 million and the
balance by an industry-wide  retrospective  assessment program. If losses at any
nuclear power plant covered by the programs  exceed the accumulated  funds,  APS
could be assessed retrospective premium adjustments.  The maximum assessment per
reactor  under the  program  for each  nuclear  incident  is  approximately  $88
million, subject to an annual limit of $10 million per incident. Based upon APS'
29.1% interest in the three Palo Verde units, APS' maximum potential  assessment
per incident is approximately $77 million,  with an annual payment limitation of
approximately $9 million.

The Palo Verde  participants  maintain "all risk"  (including  nuclear  hazards)
insurance for property damage to, and decontamination of, property at Palo Verde
in the aggregate  amount of $2.75 billion,  a substantial  portion of which must
first be applied to  stabilization  and  decontamination.  APS has also  secured
insurance  against  portions of any  increased  cost of  generation or purchased
power and business interruption resulting from a sudden and unforeseen outage of
any of the three units. The

                                      -17-

insurance  coverage  discussed in this and the previous  paragraph is subject to
certain policy conditions and exclusions.

10. Accounting Matters

In June 1998 the Financial Accounting Standards Board (FASB) issued SFAS No. 133
"Accounting  for Derivative  Instruments and Hedging  Activities."  SFAS No. 133
requires that entities recognize all derivatives as either assets or liabilities
on the balance sheet and measure those  instruments at fair value.  The standard
also provides  specific  guidance for accounting for  derivatives  designated as
hedging  instruments.  The statement was to have been  effective for us in 2000;
however,  the FASB has  moved  the  effective  date to  2001.  We are  currently
evaluating what impact this standard will have on our financial statements.

11. Memorandum of Understanding with Calpine Corporation

On April 23, 1999,  we entered into a memorandum of  understanding  with Calpine
Corporation,  an independent power producer located in San Jose, California, for
a  potential  $220  million,  500  megawatt  expansion  at the site of APS' West
Phoenix Power Plant. We entered into a further  memorandum of understanding with
Calpine  dated as of August 4, 1999,  relating  to the timing of the  definitive
agreements  and the  operation of the joint  project.  The joint  project is the
second phase of a potential 750 megawatt  expansion at West  Phoenix,  the first
phase of which includes the installation of a 120 megawatt  combined cycle unit,
the cost of which is expected to be  approximately  $60 million,  although  that
amount is currently  subject to  negotiation.  Assuming  approvals  are granted,
construction is scheduled to begin in mid-2000, with commercial operation of the
first phase in mid-2001 and the second phase in early 2002.

                                      -18-

                        PINNACLE WEST CAPITAL CORPORATION

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

In this  section,  we explain  our  results  of  operations,  general  financial
condition,  and outlook for Pinnacle West and our subsidiaries:  APS, SunCor, El
Dorado, and APS Energy Services, including:

     *    the changes in our earnings for the periods presented
     *    the factors impacting our business, including competition and electric
          industry restructuring
     *    the effects of regulatory agreements on our results
     *    our capital needs and resources and
     *    Year 2000 technology issues.

We suggest  this  section be read  along  with the 1998  10-K.  Throughout  this
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations,  we refer to specific "Notes" in the Notes to Condensed Consolidated
Financial Statements. These Notes add further details to the discussion.

OPERATING RESULTS

     OPERATING  RESULTS -  THREE-MONTH  PERIOD ENDED JUNE 30, 1999 COMPARED WITH
     THREE-MONTH PERIOD ENDED JUNE 30, 1998


Consolidated  net income  for the three  months  ended  June 30,  1999 was $68.7
million  compared with $49.0 million for the same period in the prior year.  Net
income  increased  in the  three-month  comparison  primarily  because of higher
earnings at APS.

APS' earnings  increased $19.8 million in the three-month  comparison  primarily
because  of the  effects  of warmer  weather,  an  increase  in  customers,  and
increased  contributions from power marketing and trading activities,  partially
offset by a retail price  reduction,  and higher  depreciation  and amortization
expense. See Note 7 for information on the price reduction.

     Electric operating revenues increased $70 million because of:

     *    increased power marketing and trading revenues ($36 million)
     *    the effects of warmer weather ($21 million) and
     *    increases in the number of customers ($17 million).

As mentioned  above,  these positive factors were partially offset by the effect
of a reduction in retail prices ($4 million).

                                      -19-

Power marketing and trading activities are predominantly  short-term opportunity
wholesale sales.  The increase in power marketing  revenues  resulted  primarily
from  increased  activity in western bulk power  markets.  The increase in power
marketing and trading  revenues was  accompanied by increases in purchased power
expenses.

Fuel expenses increased $37 million primarily because of increased wholesale and
retail sales volume and higher purchased power prices.

Depreciation and amortization  expense increased $4 million because APS had more
plant in service.

     OPERATING  RESULTS - SIX-MONTH  PERIOD  ENDED JUNE 30, 1999  COMPARED  WITH
     SIX-MONTH PERIOD ENDED JUNE 30, 1998

Consolidated net income for the six months ended June 30, 1999 was $99.4 million
compared  with $80.1  million for the same period in the prior year.  Net income
increased in the six-month  comparison  primarily  because of higher earnings at
APS, partially offset by lower earnings at El Dorado.

APS earnings  increased  $23.5  million in the  six-month  comparison  primarily
because  of  an  increase  in  customers,  increased  contributions  from  power
marketing and trading activities,  and the effects of warmer weather,  partially
offset by a retail price  reduction,  and higher  depreciation  and amortization
expense. See Note 7 for information on the price reduction.

     Electric operating revenues increased $103 million because of:

     *    increased power marketing and trading revenues ($70 million)
     *    increases in the number of customers ($29 million)
     *    the effects of warmer weather ($10 million) and
     *    miscellaneous factors ($2 million).

As mentioned  above,  these positive factors were partially offset by the effect
of a reduction in retail prices ($8 million).

Power marketing and trading activities are predominantly  short-term opportunity
wholesale  sales.  The  increase  in  power  marketing  revenues  resulted  from
increased  activity  in  western  bulk  power  markets.  The  increase  in power
marketing and trading  revenues was  accompanied by increases in purchased power
expenses.

Fuel expenses increased $62 million primarily because of increased wholesale and
retail sales volume and higher purchased power prices.

Depreciation and amortization  expense increased $8 million because APS had more
plant in service.

El Dorado's earnings decreased $4 million because of investment sales in 1998.

                                      -20-

     OPERATING  RESULTS - TWELVE-MONTH  PERIOD ENDED JUNE 30, 1999 COMPARED WITH
     TWELVE-MONTH PERIOD ENDED JUNE 30, 1998

Consolidated  net income for the twelve  months  ended June 30,  1999 was $262.2
million  compared with $223.4 million for the same period in the prior year. Net
income  increased in the  twelve-month  comparison  primarily  because of higher
earnings at APS and lower  financing  costs at the parent,  partially  offset by
lower contributions to earnings by the other subsidiaries.

APS earnings  increased $42.9 million in the twelve-month  comparison  primarily
because  of  an  increase  in  customers,  increased  contributions  from  power
marketing  and  trading  activities,  the effects of warmer  weather,  and lower
financing costs. In the comparison,  these positive factors more than offset the
effects of two fuel-related settlements recorded in the third quarter of 1997, a
retail  price  reduction  that  became   effective  July  1,  1998,  and  higher
depreciation and  amortization  expense.  See Note 7 for additional  information
about the price reduction.

Operating revenues increased $247 million primarily because of:

     *    increased power marketing and trading revenues ($164 million)
     *    increases  in the  number  of  customers  and the  average  amount  of
          electricity used by customers ($79 million)
     *    the effects of warmer weather ($15 million) and
     *    miscellaneous factors ($7 million).

As mentioned  above,  these positive factors were partially offset by the effect
of a reduction in retail prices ($18 million).

Power marketing and trading activities are predominantly  short-term opportunity
wholesale  sales.  The  increase  in  power  marketing  revenues  resulted  from
increased  activity in Western bulk power markets,  higher prices, and increased
sales to large  customers in  California.  The increase in power  marketing  and
trading revenues was accompanied by increases in purchased power expenses.

Fuel expense increased $178 million primarily because of increased wholesale and
retail sales volumes,  the effects of two fuel-related  settlements in the third
quarter of 1997, and higher  purchased power prices.  The settlements  increased
pretax  earnings in the twelve months ended June 30, 1998 by  approximately  $21
million.  The income statement  reflects these settlements as reductions in fuel
expense and as other income.

Depreciation and amortization expense increased $17 million because APS had more
plant in service.

APS  decreased  its financing  costs by $10 million  primarily  because of lower
amounts of outstanding debt and preferred stock and lower interest rates.

                                      -21-

Parent  company  financing  costs  decreased $7 million as we paid down debt and
took advantage of lower interest rates.

El Dorado's earnings decreased $5 million in the twelve-month  period because of
investment sales in 1998 and 1997.

APS Energy Services,  which was incorporated in late 1998, reported a loss of $3
million for the twelve-month period.

     OTHER INCOME

As part of a 1994 rate settlement with the ACC, APS accelerated  amortization of
substantially  all deferred  ITCs over a five-year  period that ends on December
31, 1999. The  amortization  of ITCs decreases  annual  consolidated  income tax
expense by  approximately  $24 million.  Beginning in 2000, no further  benefits
will be reflected in income tax expense.

LIQUIDITY AND CAPITAL RESOURCES

     PARENT COMPANY

The  parent   company's  cash   requirements  and  its  ability  to  fund  those
requirements  are discussed  under "Capital Needs and Resources" in Management's
Discussion and Analysis of Financial  Condition and Results of Operation in Part
II, Item 7 of the 1998 10-K.

During  the  six-months  ended  June  30,  1999,  the  parent  company  redeemed
approximately  $19 million of its long-term  debt with cash from  operations and
proceeds from long-term borrowings.

As a result of the 1996  regulatory  agreement  (see Note 7), the parent company
has invested  $50 million in APS in 1996,  1997 and 1998 and will make the final
investment of $50 million in 1999.

On April 23, 1999,  we entered into a memorandum of  understanding  with Calpine
Corporation,  an independent power producer located in San Jose, California, for
a  potential  $220  million,  500  megawatt  expansion  at the site of APS' West
Phoenix Power Plant. We entered into a further  memorandum of understanding with
Calpine  dated as of August 4, 1999,  relating  to the timing of the  definitive
agreements  and the  operation of the joint  project.  The joint  project is the
second phase of a potential 750 megawatt  expansion at West  Phoenix,  the first
phase of which includes the installation of a 120 megawatt  combined cycle unit,
the cost of which is expected to be  approximately  $60 million,  although  that
amount is currently  subject to  negotiation.  Assuming  approvals  are granted,
construction is scheduled to begin in mid-2000,  with  commercial  operations of
the first phase in mid-2001 and of the second  phase in early 2002.  We are also
considering  additional  expansion over the next several years, which may result
in additional  expenditures.  We currently believe that there will be additional

                                      -22-

opportunities  to expand our  investment in  generating  assets in the next five
years. It is expected that these and other generating  assets would be organized
in a non-regulated subsidiary under the parent company.

The Board declared a quarterly dividend of 32.5 cents per share of common stock,
payable September 1, 1999 to shareholders of record on August 2, 1999,  totaling
approximately $27.6 million.

     APS

For the six months ended June 30, 1999, APS incurred  approximately $154 million
in  capital  expenditures,  which  is  approximately  47% of the  most  recently
estimated 1999 capital expenditures. APS' projected capital expenditures for the
next three years are: 1999,  $328 million;  2000,  $353 million;  and 2001, $343
million.  These  amounts  include  about $30 - $35 million each year for nuclear
fuel expenditures.

APS'  long-term debt and preferred  stock  redemption  requirements  and payment
obligations  on a  capitalized  lease for the next three years are:  1999,  $387
million;  2000, $115 million; and 2001, $2 million.  During the six months ended
June 30, 1999, APS redeemed approximately $216 million of its long-term debt and
all $96  million  (including  premiums)  of its  preferred  stock with cash from
operations and long-term and short-term  debt. In February 1999, APS issued $125
million  of  unsecured  long-term  debt.  As a  result  of the  1996  regulatory
agreement (see Note 7), Pinnacle West invested $50 million in APS in 1996, 1997,
and 1998 and will make the final investment of $50 million in 1999.

Although  provisions  in  APS'  first  mortgage  bond  indenture,   articles  of
incorporation,  and ACC financing orders establish maximum amounts of additional
first  mortgage  bonds  that we may  issue,  APS  does not  expect  any of these
provisions to limit its ability to meet its capital requirements.

YEAR 2000 READINESS DISCLOSURE

OVERVIEW As the year 2000 approaches,  many companies face problems because many
computer  systems and  equipment  will not  properly  recognize  calendar  dates
beginning with the year 2000. We are addressing the Year 2000 issue as described
below. APS initiated a comprehensive  company-wide Year 2000 program during 1997
to review and resolve all Year 2000 issues in mission  critical systems (systems
and equipment that are key to the power production, delivery, health, and safety
functions) in a timely manner to ensure the  reliability of electric  service to
its customers.  This included a company-wide  awareness program of the Year 2000
issue.  APS has an  internal  audit/quality  review  team  that is  periodically
reviewing the individual Year 2000 projects and their Year 2000 readiness.

                                      -23-

The following chart shows Year 2000 readiness of our mission critical systems as
of June 30, 1999:

                            Inventory      Assessment      Remediation & Testing
                            ---------      ----------      ---------------------
APS                           100%            100%                 100%

Pinnacle West and
  other subsidiaries
  (excluding APS)             100%            100%                  95%(1)

(1) Estimated to be at 100% by September 30, 1999.

DISCUSSION  APS  has  been  actively  implementing  and  replacing  systems  and
technology since 1995 for general  business reasons  unrelated to the Year 2000,
and these actions have resulted in  substantially  all of its major  information
technology  (IT)  systems  becoming  Year 2000 ready.  The major IT systems that
were, and are being, implemented and replaced include the following:

     *    Work Management
     *    Materials Management
     *    Energy Management System
     *    Payroll
     *    Financial
     *    Human Resources
     *    Trouble Call Management System
     *    Computer and Communications Network Upgrades
     *    Geographic Information System
     *    Customer Information System and
     *    Palo Verde Site Work Management System.

We  and  our  subsidiaries  have  made,  and  will  continue  to  make,  certain
modifications to computer hardware, software, and application systems, including
IT and non-IT  systems,  in an effort to ensure  they are  capable  of  handling
changing  business needs,  including  dates in the year 2000 and thereafter.  In
addition, other APS IT systems and non-IT systems, including embedded technology
and  real-time  process  control  systems,  are  being  analyzed  for  potential
modifications.

Pinnacle West and its subsidiaries have inventoried and assessed essentially all
mission  critical IT and non-IT systems and equipment.  APS is 100% complete and
Pinnacle West and its other  subsidiaries  are 95% complete with the remediation
and  testing  of  these  systems.  APS  notified  the  North  American  Electric
Reliability  Council (NERC) on June 30, 1999, that its mission  critical systems
are ready for date changes  associated  with the Year 2000, in  accordance  with
NERC's recommended criteria. APS also notified the Nuclear Regulatory Commission
(NRC) that Palo Verde is "Y2K Ready," which means that Palo Verde has followed a
prescribed  program to identify

                                      -24-

and  resolve  Year 2000  issues so that the plant  can  operate  reliably  while
meeting commitments.

As previously reported,  APS expected remediation and testing to be completed by
June 30, 1999, for all mission critical systems,  except for (i) Palo Verde Unit
1 systems and (ii) the continuous  emissions  monitoring systems (CEMS) for four
of its fossil plants. See "Year 2000 Readiness  Disclosure" in Part I, Item 2 of
the March  10-Q.  However,  as of June 30,  1999,  remediation  and  testing was
completed for all mission  critical  systems,  including  Palo Verde Unit 1, but
excluding CEMS,  which have been removed from the mission  critical systems list
because the  failure of the system  would not lead to an  unplanned  shutdown of
generation.  This is based on NERC's June 14, 1999 clarifying  pronouncement  on
exception  reporting.  APS currently expects the CEMS for the four fossil plants
to be Y2K Ready no later than the fourth quarter 1999.

APS currently  estimates that it will spend approximately $5 million relating to
Year 2000  issues,  about $4.5  million  of which has been  spent to date.  This
includes an estimated  allocation of payroll costs for APS employees  working on
Year 2000 issues, and costs for consultants,  hardware,  and software. We do not
separately  track other internal costs.  This does not include any  expenditures
incurred  since 1995 to implement and replace  systems for reasons  unrelated to
the Year 2000,  as discussed  above.  Our cost to address the Year 2000 issue is
charged to  operating  expenses as incurred and has not had, and is not expected
to have, a material  adverse effect on our financial  position,  cash flows,  or
results of operations.  We expect to fund this cost with available cash balances
and cash provided by operations.

Pinnacle West and its  subsidiaries  are  communicating  with their  significant
suppliers,  business partners, other utilities, and large customers to determine
the  extent to which  they may be  affected  by these  third  parties'  plans to
remediate  their own Year 2000 issues in a timely manner.  These  companies have
been interfacing with suppliers of systems,  services, and materials in order to
assess whether their  schedules for analysis and remediation of Year 2000 issues
are timely and to assess their ability to continue to supply  required  services
and materials.

APS has also been  working with NERC  through the Western  Systems  Coordinating
Council (WSCC) to develop  operational plans for stable grid operation that will
be  utilized  by APS and other  utilities  in the western  United  States.  APS'
operational plans are complete. However, APS cannot currently predict the effect
on APS if the systems of these other companies are not Year 2000 ready.

We  currently  expect  that our most  reasonably  likely  worst  case  Year 2000
scenario would be  intermittent  loss of power to APS  customers,  similar to an
outage during a severe weather disturbance. In this situation, APS would restore
power as soon as possible by, among other things,  re-routing power flows. We do
not currently  expect that this scenario would have a material adverse effect on
our financial position, cash flows, or results of operations.

                                      -25-

Pinnacle West and its subsidiaries have developed their own contingency plans to
handle  Year 2000  issues,  including  the most  reasonably  likely  worst  case
scenario discussed above. These plans were completed June 30, 1999.

COMPETITION AND ELECTRIC INDUSTRY RESTRUCTURING

See  Note  5 for  a  discussion  of  regulatory  accounting.  See  Note  6 for a
discussion of a proposed  Settlement  Agreement related to the implementation of
retail electric competition. See Note 8 for a discussion of a proposed amendment
to a Power  Coordination  Agreement  with Salt River  Project that APS estimates
would reduce its pretax costs for purchased power by  approximately  $17 million
during the first full year that the  amendment is effective and by lesser annual
amounts during the next seven years.

RATE MATTERS

See Note 7 for a  discussion  of a proposed  price  reduction  that would become
effective  as of  July  1,  1999.  See  Note 6 for a  discussion  of a  proposed
Settlement  Agreement that would, among other things,  result in rate reductions
over a four year period ending July 1, 2003.

FORWARD-LOOKING STATEMENTS

The above discussion contains forward-looking  statements that involve risks and
uncertainties.  Words such as "estimates,"  "expects,"  "anticipates,"  "plans,"
"believes,"   "projects,"  and  similar  expressions  identify   forward-looking
statements.  These risks and uncertainties  include, but are not limited to, the
ongoing  restructuring of the electric  industry;  the outcome of the regulatory
proceedings  relating to the restructuring;  regulatory,  tax, and environmental
legislation;  the ability of APS to successfully compete outside its traditional
regulated  markets;  regional economic  conditions,  which could affect customer
growth;  the cost of debt  and  equity  capital;  weather  variations  affecting
customer  usage;  technological  developments  in  the  electric  industry;  the
successful  completion of a large-scale  construction project; Year 2000 issues;
and the strength of the real estate market.

These factors and the other matters  discussed above may cause future results to
differ  materially  from  historical  results,  or from  results or  outcomes we
currently expect or seek.

ITEM 3. MARKET RISKS

Our  operations  include  managing  market risks  related to changes in interest
rates,  commodity  prices,  and investments held by the nuclear  decommissioning
trust fund.

Our major financial  market risk exposure is changing  interest rates.  Changing
interest  rates will affect  interest  paid on variable  rate debt and  interest
earned  by the  nuclear  decommissioning  trust  fund.  Our  policy is to manage
interest rates through the use of a combination of fixed and floating rate debt.
The nuclear  decommissioning fund also

                                      -26-

has risks associated with changing market values of equity investments.  Nuclear
decommissioning costs are recovered in rates.

APS  is  exposed  to  the  impact  of  market  fluctuations  in  the  price  and
distribution  costs  of  electricity,  natural  gas,  coal,  and  emissions  and
therefore  employs  established  procedures to manage its risks  associated with
these market fluctuations by utilizing various commodity derivatives,  including
exchange traded futures and options and over-the-counter forwards,  options, and
swaps.  As part of its overall risk  management  program,  APS enters into these
derivative  transactions for trading and to hedge certain natural gas in storage
as well as purchases and sales of electricity, fuels, and emissions.

APS measures  the price risk in its  commodity  derivative  portfolio on a daily
basis utilizing  market  sensitivity  based modeling to understand  expected and
potential single day favorable or unfavorable  impacts to income before tax. The
model results are monitored daily to ensure compliance  against  thresholds on a
commodity and portfolio basis. As of June 30, 1999, a hypothetical adverse price
movement of 10% in the market price of APS' commodity derivative portfolio would
decrease the fair market value of these contracts by  approximately  $8 million.
This analysis does not include the favorable impact this same hypothetical price
move would have on the  underlying  position  being  hedged  with the  commodity
derivative portfolio.

APS is exposed to credit losses in the event of  non-performance  or non-payment
by  counterparties.  APS uses a credit management  process to assess and monitor
the  financial  exposure  of  counterparties.  APS does not expect  counterparty
defaults to materially impact its financial condition, results of operations, or
net cash flows.

                           PART II - OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

In June 1999,  the Navajo Nation served Salt River Project with a lawsuit naming
Salt River Project, several Peabody Coal Company entities ("Peabody"),  Southern
California Edison Company,  and other  defendants,  and citing various claims in
connection  with the  renegotiations  of the coal  royalty and lease  agreements
under which  Peabody mines coal for the Navajo and Mohave  Generating  Stations.
THE NAVAJO  NATION V. PEABODY  HOLDING  COMPANY,  INC.,  ET AL.,  United  States
District Court for the District of Columbia,  No.  CA-99-0469-EGS.  APS is a 14%
owner of Navajo Generating Station,  which Salt River Project operates. The suit
alleges,  among other  things,  that the  defendants  obtained a favorable  coal
royalty rate by improperly  influencing the outcome of a federal  administrative
process  under which the royalty  rate was to be  adjusted.  The suit seeks $600
million  in  damages,  treble  damages,  punitive  damages  of not less  than $1
billion,  and the ejection of  defendants  "from all  possessory  interests  and
Navajo Tribal lands" arising out of the [primary coal lease]. Salt River Project
has advised APS that it denies all charges and will  vigorously  defend  itself.
Because the litigation is in preliminary  stages,  APS cannot currently  predict
the outcome of this matter.

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

At our  annual  Meeting  of  Shareholders  held on May 19,  1999  the  following
shareholder proposal was submitted to shareholders:

                                                                     Abstentions
                                          Votes          Votes        and Broker
                                           For          Against        Non Votes
                                          -----         -------      -----------
    Proposal that Pinnacle              2,413,519      63,160,240     2,955,431
    West refuse to use
    plutonium (MOX) fuel and
    refuse to generate tritium

In addition,  at the same annual  meeting,  the  following  persons were elected
Class  II  Directors  with a term  to  expire  at the  2002  annual  meeting  of
shareholders:
                                                                     Abstentions
                                          Votes          Votes       and Broker
                                           For         Withheld       Non Votes
                                          -----         -------      -----------
    Edward N. Basha                     78,205,297     1,528,855         N/A

    Michael L. Gallagher                78,246,095     1,488,057         N/A

    William J. Post                     78,396,955     1,337,197         N/A

                                      -28-

ITEM 5. OTHER INFORMATION

     CONSTRUCTION AND FINANCING PROGRAMS

See  "Liquidity  and Capital  Resources"  in Part I, Item 2 of this report for a
discussion of APS' construction and financing programs.

     COMPETITION AND ELECTRIC INDUSTRY RESTRUCTURING

See Note 6 of Notes to Condensed  Consolidated  Financial  Statements in Part I,
Item 1 of this report for a discussion of  competition  and the rules  regarding
the  introduction  of retail  electric  competition  in  Arizona  and a proposed
settlement agreement with the ACC.

     ENVIRONMENTAL MATTERS

As previously reported, in July 1997, EPA promulgated final national ambient air
quality  standards  for  ozone  and  coarse  and fine  particulate  matter.  See
"Environmental  Matters - EPA Environmental  Regulation - Clear Air Act" in Part
I,  Item 1 of the 1998  10-K.  These  standards  were  challenged  and the court
determined that EPA's  promulgation of the standards violated the constitutional
prohibition  on delegation of  legislative  power.  The court remanded the ozone
standard,  vacated  the coarse  particulate  matter  standard,  and  invited the
parties to brief the court on vacating or remanding the fine particulate  matter
standard. APS cannot currently predict EPA's response to this decision.

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

     (a)  Exhibits

Exhibit No.       Description
- -----------       -----------
   10.1(a)        Key  Executive  Employment  and  Severance  Agreement  between
                  Pinnacle West and certain executive  officers of Pinnacle West
                  and its subsidiaries

   27.1           Financial Data Schedule


- ----------
(a) Additional agreements,  substantially  identical in all material respects to
this Exhibit have been entered into with  additional  officers of Pinnacle  West
and its  subsidiaries.  Although such  additional  documents may differ in other
respects (such as dollar amounts and dates of execution),  there are no material
details in which such agreements differ from this Exhibit.

                                      -29-

In addition to those Exhibits shown above,  the Company hereby  incorporates the
following   Exhibits  pursuant  to  Exchange  Act  Rule  12b-32  and  Regulation
ss.229.10(d) by reference to the filings set forth below:



EXHIBIT NO.   DESCRIPTION                    ORIGINALLY FILED AS EXHIBIT:   FILE NO.(b)   DATE EFFECTIVE
- -----------   -----------                    ----------------------------   -----------   --------------
                                                                              
   10.1       Articles of Incorporation      19.1 to the Company's             1-8962        11-14-88
              restated as of July 29, 1988   September 30, 1988
                                             Form 10-Q Report

   10.2       Bylaws, amended as of          3.1 to the Company's 1995         1-8962          4-1-96
              February 21, 1996              Form 10-K Report


     (b)  Reports on Form 8-K

     During the quarter ended June 30, 1999,  and the period from July 1 through
August 16, 1999, we filed the following reports on Form 8-K:

     Report  dated  March 22,  1999  relating  to  Pinnacle  West's  amended and
restated stockholder rights plan, effective March 26, 1999.

     Report dated May 14, 1999  regarding the settlement  agreement  between APS
and various other parties,  including  representatives of major consumer groups,
related to the implementation of retail electric competition.


- ----------
(b)  Reports  filed  under  File No.  1-8962  were  filed in the  office  of the
Securities and Exchange Commission located in Washington, D.C.

                                      -30-

                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Company  has  duly  caused  this  report  to be  signed  on  its  behalf  by the
undersigned thereunto duly authorized.


                                        PINNACLE WEST CAPITAL CORPORATION
                                                  (Registrant)


Dated: August 16, 1999                  By: George A. Schreiber, Jr.
                                            ------------------------------------
                                            George A. Schreiber, Jr.
                                            President and
                                            Chief Financial Officer
                                            (Principal Financial Officer
                                            and Officer Duly Authorized
                                            to sign this Report)