EXHIBIT 99.1

               STATEMENT UNDER OATH OF PRINCIPAL EXECUTIVE OFFICER
                   REGARDING FACTS AND CIRCUMSTANCES RELATING
                             TO EXCHANGE ACT FILINGS


     I, William J. Post, state and attest that:

         (1) To the best of my knowledge, based upon a review of the covered
reports of Pinnacle West Capital Corporation, and, except as corrected or
supplemented in a subsequent covered report:

          *    no covered report contained an untrue statement of a material
               fact as of the end of the period covered by such report (or in
               the case of a report on Form 8-K or definitive proxy materials,
               as of the date on which it was filed); and
          *    no covered report omitted to state a material fact necessary to
               make the statements in the covered report, in light of the
               circumstances under which they were made, not misleading as of
               the end of the period covered by such report (or in the case of a
               report on Form 8-K or definitive proxy materials, as of the date
               on which it was filed).

     (2) I have reviewed the contents of this statement with Pinnacle West
Capital Corporation's Audit Committee.

     (3) In this statement under oath, each of the following, if filed on or
before the date of this statement, is a "covered report":

          *    the Annual Report on Form 10-K for the fiscal year ended December
               31, 2001 of Pinnacle West Capital Corporation;
          *    all reports on Form 10-Q, all reports on Form 8-K and all
               definitive proxy materials of Pinnacle West Capital Corporation
               filed with the Commission subsequent to the filing of the Form
               10-K identified above; and
          *    any amendments to any of the foregoing.


William J. Post                                Subscribed and sworn to before me
------------------------------------           this 13th day of August, 2002.
William J. Post
Chairman of the Board and
Chief Executive Officer
Date: 8/13/02                                  Kris Fenex
     -------------------------------           --------------------------------
                                               Notary Public
                                               My commission expires: 8/16/02