EXHIBIT 99.1

                         [Apache Corporation Letterhead]


                                 March 21, 2002



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

         Re:  Temporary Note 3T

Dear Sir:

         The consolidated financial statements of Apache Corporation and
subsidiaries as of December 31, 2001 and for the year then ended have been
audited by Arthur Andersen LLP ("Andersen").

         Andersen has represented to Apache Corporation that the audit was
subject to Andersen's quality control system for the U.S. accounting and
auditing practice to provide reasonable assurance that the engagement was
conducted in compliance with professional standards and that there was
appropriate continuity of Andersen personnel working on the audit, availability
of national office consultation and availability of personnel at foreign
affiliates of Andersen to conduct the relevant portions of the audit.

                                       Very truly yours,

                                       APACHE CORPORATION



                                       By: /s/ Roger B. Plank
                                           Roger B. Plank
                                           Executive Vice President and
                                           Chief Financial Officer