Ex-12a Idaho Power Company Consolidated Financial Information Supplemental Ratio of Earnings to Fixed Charges Twelve Months Ended December 31, (Thousands of Dollars) 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 $92,274 Income taxes: Income taxes (incl amounts charged to other income and deductions)............ 24,601 38,057 35,307 49,498 51,316 47,559 Investment tax credit adjustment............ (1,439) (1,583) (1,064) (1,086) 776 (1,087) Total income taxes.................... 23,162 36,474 34,243 48,412 52,092 46,472 Income before income taxes...................... 83,152 120,938 109,173 135,333 142,710 138,746 Fixed Charges: Interest on long-term debt................. 53,408 53,706 51,172 51,147 52,165 53,215 expense and premium - net.................. 392 507 567 567 594 653 Interest on short-term bank loans........... 647 220 1,157 3,144 2,269 2,902 Other interest.............................. 1,011 2,023 1,538 1,598 2,319 3,990 Interest portion of rentals................. 683 1,077 794 925 991 982 Total fixed charges................... 56,141 57,533 55,228 57,381 58,338 61,742 Supplemental increment to fixed charges* .. 2,487 2,631 2,622 2,611 2,600 2,574 Total supplemental fixed charges...... 58,628 60,164 57,850 59,992 60,938 64,316 Supplemental Earnings - as defined............. $141,780 $181,102 $167,023 $195,325 $203,648 $203,062 Supplemental Ratio of earnings to fixed charges 2.42x 3.01x 2.89x 3.26x 3.34x 3.16x <F1> * 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-A