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) June 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 $93,079 Income taxes: Income taxes (incl amounts charged to other income and deductions)............ 38,057 35,307 49,498 51,316 47,559 43,793 Investment tax credit adjustment............ (1,583) (1,064) (1,086) 776 (1,087) (470) Total income taxes.................... 36,474 34,243 48,412 52,092 46,472 43,323 Income before income taxes...................... 120,938 109,173 135,333 142,710 138,746 136,402 Fixed Charges: Interest on long-term debt................. 53,706 51,172 51,147 52,165 53,215 52,350 expense and premium - net.................. 507 567 567 594 653 656 Interest on short-term bank loans........... 220 1,157 3,144 2,269 2,902 3,050 Other interest.............................. 2,023 1,538 1,598 2,319 3,990 4,104 Interest portion of rentals................. 1,077 794 925 991 982 1,002 Total fixed charges................... 57,533 55,228 57,381 58,338 61,742 61,162 Supplemental increment to fixed charges* .. 2,631 2,622 2,611 2,600 2,574 2,580 Supplemental fixed charges............ 60,164 57,850 59,992 60,938 64,316 63,742 Preferred dividends requirements............ 8,547 10,682 12,392 12,146 7,803 8,663 Total supplemental fixed charges and preferred dividends.............. 68,711 68,532 72,384 73,084 72,119 72,405 Supplemental Earnings - as defined............. $181,102 $167,023 $195,325 $203,648 $203,062 $200,144 Supplemental Ratio of earnings to fixed charges and preferred dividends.............. 2.64x 2.44x 2.70x 2.79x 2.82x 2.76x <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.