Ex-12c Idaho Power Company Consolidated Financial Information Supplemental Ratio of Earnings to Combined Fixed Charges and Preferred Dividends Requirements Twelve Months Twelve Months Ended December 31, Ended (Thousands of Dollars) September 30, 1993 1994 1995 1996 1997 1998 Computation of Ratio of Earnings to Fixed Charges: Consolidated net income..................... $84,464 $74,930 $86,921 $90,618 $92,274 $95,654 Income taxes: Income taxes (incl amounts charged to other income and deductions)............ 38,057 35,307 49,498 51,316 47,559 45,376 Investment tax credit adjustment............ (1,583) (1,064) (1,086) 776 (1,087) (376) Total income taxes.................... 36,474 34,243 48,412 52,092 46,472 45,000 Income before income taxes...................... 120,938 109,173 135,333 142,710 138,746 140,654 Fixed Charges: Interest on long-term debt................. 53,706 51,172 51,147 52,165 53,215 52,309 expense and premium - net.................. 507 567 567 594 653 652 Interest on short-term bank loans........... 220 1,157 3,144 2,269 2,902 2,939 Other interest.............................. 2,023 1,538 1,598 2,319 3,990 5,321 Interest portion of rentals................. 1,077 794 925 991 982 947 Total fixed charges................... 57,533 55,228 57,381 58,338 61,742 62,168 Supplemental increment to fixed charges* .. 2,631 2,622 2,611 2,600 2,574 2,576 Supplemental fixed charges............ 60,164 57,850 59,992 60,938 64,316 64,744 Preferred dividends requirements............ 8,547 10,682 12,392 12,146 7,803 8,675 Total supplemental fixed charges and preferred dividends.............. 68,711 68,532 72,384 73,084 72,119 73,419 Supplemental Earnings - as defined............. $181,102 $167,023 $195,325 $203,648 $203,062 $205,398 Supplemental Ratio of earnings to fixed charges and preferred dividends.............. 2.64x 2.44x 2.70x 2.79x 2.82x 2.80x <F2> * Explanation of increment: Exhibit 12-C interest on the guaranty of American Falls District bonds and Milner Dam Inc. notes which are already included in operating expense.