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, 1992 1993 1994 1995 1996 1997 Computation of Ratio of Earnings to Fixed Charges: Consolidated net income..................... $59,990 $84,464 $74,930 $86,921 $90,618 $87,795 Income taxes: Income taxes (incl amounts charged to other income and deductions)............ 24,601 38,057 35,307 49,498 51,316 46,596 Investment tax credit adjustment............ (1,439) (1,583) (1,064) (1,086) 776 689 Total income taxes.................... 23,162 36,474 34,243 48,412 52,092 47,285 Income before income taxes...................... 83,152 120,938 109,173 135,333 142,710 135,080 Fixed Charges: Interest on long-term debt................. 53,408 53,706 51,172 51,147 52,165 53,463 expense and premium - net.................. 392 507 567 567 594 631 Interest on short-term bank loans........... 647 220 1,157 3,144 2,269 2,338 Other interest.............................. 1,011 2,023 1,538 1,598 2,319 3,448 Interest portion of rentals................. 683 1,077 794 925 991 937 Total fixed charges................... 56,141 57,533 55,228 57,381 58,338 60,817 Supplemental increment to fixed charges*.... 2,487 2,631 2,622 2,611 2,600 2,606 Supplemental fixed charges............ 58,628 60,164 57,850 59,992 60,938 63,423 Preferred dividends requirements............ 7,611 8,547 10,682 12,392 12,146 8,634 Total supplemental fixed charges and preferred dividends.............. 66,239 68,711 68,532 72,384 73,084 72,057 Supplemental Earnings - as defined............. $141,780 $181,102 $167,023 $195,325 $203,648 $198,503 Supplemental Ratio of earnings to fixed charges and preferred dividends.............. 2.14x 2.64x 2.44x 2.70x 2.79x 2.75x <F2> * Explanation of increment: Interest on the guaranty of American Falls Reservoir District bonds and Milner Dam Inc. notes which are already included in operating expense. Exhibit 12-C