Exhibit 15 Idaho Power Company 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 Idaho Power Company and subsidiaries for the periods ended June 30, 1995 and 1994, as indicated in our report dated July 31, 1995; because we did not perform an audit, we expressed no opinion on that information. We are aware that our report referred to above, which is included in your Quarterly Report on Form 10-Q for the quarter ended June 30, 1995, is incorporated by reference in Registration Statement Nos. 33-65720 and 33-51215 on Form S-3, and Registration Statement No. 33-56071 on Form S-8. We also are aware that the aforementioned report, pursuant to Rule 436(c) under the Securities Act, is 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 Sections 7 and 11 of that Act. DELOITTE & TOUCHE LLP Portland, Oregon July 31, 1995