EXHIBIT 12.3 SOUTHWESTERN ELECTRIC POWER COMPANY (CONSOLIDATED) RATIO OF EARNINGS TO FIXED CHARGES FOR THE TWELVE MONTHS ENDED MARCH 31, 1998 (Thousands Except Ratio) (Unaudited) Operating Income $142,468 Adjustments: Income taxes 45,507 Provision for deferred income taxes (3,419) Deferred investment tax credits (4,662) Other income and deductions 3,962 Allowance for borrowed and equity funds used during construction 2,678 Interest portion of financing leases 764 --------- Earnings $187,298 ========= Fixed Charges: Interest on long-term debt $39,705 Distributions on Trust Preferred Securities 7,748 Interest on short-term debt and other 5,344 Interest portion of financing leases 764 --------- Fixed Charges $53,561 ========= Ratio of Earnings to Fixed Charges 3.50 =========