ILLINOVA CORPORATION STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Thousands of Dollars) Year Ended December 31, Supplemental** - ------------------------------------------------------------------------------------------------------------------------------------ 1992 1993 1993 1994 1995 1996 Earnings Available for Fixed Charges: Net Income (Loss) $93,234 ($81,874) ($81,874) $151,786 $151,601 $191,021 Add: Income Taxes: Current 22,930 25,260 25,260 58,354 98,578 163,873 Deferred-Net 63,739 82,057 82,057 71,177 34,137 (16,028) Allocated income taxes (6,632) (12,599) (8,285) (11,851) (12,641) Investment tax credit-deferred (519) (782) (782) (11,331) (6,894) (7,278) Income tax effect of disallowed costs - (70,638) (70,638) - - - Interest on long-term debt 160,795 154,110 154,110 135,115 125,581 118,438 Amortization of debt expense and premium-net, and other interest charges 12,195 17,007 17,007 15,826 29,558 22,325 One-third of all rentals (Estimated to be represen- tative of the interest component) 5,117 5,992 5,992 5,847 5,221 4,346 Interest on in-core fuel 8,278 6,174 6,174 7,185 6,716 4,757 Disallowed Clinton plant costs - - 270,956 - - - ------- ------- ------- ------- ------- -------- Earnings (loss) available for fixed charges $359,137 $124,707 $395,663 $425,674 $432,647 $468,813 ========= ======== ======== ======== ======== ======== Fixed charges: Interest on long-term debt 160,795 154,110 154,110 135,115 125,581 118,438 Amortization of debt expense and premium-net, and other interest charges 25,785 27,619 27,619 25,381 38,147 28,957 One-third of all rentals (Estimated to be representative of the interest component) 5,117 5,992 5,992 5,847 5,221 4,346 -------- -------- --------- -------- -------- -------- Total Fixed Charges $191,697 $187,721 $187,721 $166,343 $168,949 $151,741 ========= ========= ========== ========== ========= ======== Ratio of earnings to fixed charges 1.87 0.66* 2.11 2.56 2.56 3.09 ========= ========== ========== ========== ========= ========= * Earnings are inadequate to cover fixed charges. Additional earnings (thousands) of $63,014 for 1993 are required to attain a one-to-one ratio of Earnings to Fixed Charges. **Supplemental ratio of earnings to fixed charges presented to exclude nonrecurring item - Disallowed Clinton plant costs.