EX-15.1 4 ex151.txt AUDITORS' LETTER Exhibit 15.1 May 18, 2001 IDACORP, Inc. Boise, Idaho We have made a review, in accordance with standards established by the American Institute of Certified Public Accountants, of the unaudited interim financial information of IDACORP, Inc. and subsidiaries and Idaho Power Company and subsidiaries for the periods ended March 31, 2001 and 2000, as indicated in our reports dated May 3, 2001; because we did not perform audits, we expressed no opinion on that information. We are aware that our reports referred to above, which are included in your Quarterly Report on Form 10- Q for the quarter ended March 31, 2001, are incorporated by reference in IDACORP, Inc.'s Amendment No. 1 to Registration Statement No. 333-57422 on Form S-4. We also are aware that the aforementioned reports, pursuant to Rule 436(c) under the Securities Act of 1933, are not considered a part of the Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Section 7 and 11 of that Act. /s/ Deloitte & Touche, LLP DELOITTE & TOUCHE, LLP Boise, Idaho