EXHIBIT 12.3 SOUTHWESTERN ELECTRIC POWER COMPANY (CONSOLIDATED) RATIO OF EARNINGS TO FIXED CHARGES FOR THE TWELVE MONTHS ENDED MARCH 31,1999 (Thousands Except Ratio) (Unaudited) Operating Income $148,023 Adjustments Income taxes 61,751 Provision for deferred income taxes (13,203) Deferred investment tax credits (4,607) Other income and deductions 774 Allowance for borrowed and equity funds used during construction 2,180 Interest portion of financing leases 543 ----------- Earnings $195,461 =========== Fixed Charges: Interest on long-term debt $39,227 Interest on short-term debt and other 9,263 Distributions on Trust Preferred Securities 8,662 Interest portion of financing leases 543 ----------- Fixed Charges $57,695 =========== Ratio of Earnings to Fixed Charges 3.39 ===========