EXHIBIT 12.3 SOUTHWESTERN ELECTRIC POWER COMPANY RATIO OF EARNINGS TO FIXED CHARGES FOR THE TWELVE MONTHS ENDED MARCH 31, 1997 (Thousands except Ratio) (Unaudited) Operating Income $137,808 Adjustments: Income taxes 41,304 Provision for deferred income taxes (4,063) Deferred investment tax credits (4,712) Utility plant development costs, net of tax (22,298) Other income and deductions (264) Allowance for borrowed and equity funds used during construction 1,743 Interest portion of financing leases 1,391 ------- Earnings $150,909 ======= Fixed Charges: Interest on long-term debt $ 43,609 Amortization of debt issuance cost 3,457 Other interest 4,612 Interest portion of financing leases 1,391 ------- Fixed Charges $ 53,069 ======= Ratio of Earnings to Fixed Charges 2.84 =======