EXHIBIT 99.0 WASHINGTON GAS LIGHT COMPANY AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Twelve Months Ended December 31, 1999 (Unaudited) (Dollars in Thousands) FIXED CHARGES Interest Expense $ 38,050 Amortization of Debt Premium, Discount and Expense 513 Interest Component of Rentals 12 ------------ Total Fixed Charges $ 38,575 ============ EARNINGS Net Income $ 83,632 Add: Income Taxes Applicable to Utility Operating Income 45,967 Income Taxes Applicable to Non-Utility Operating Income 4,927 Income Taxes Applicable to Other Income (Expenses)--Net (411) Total Fixed Charges 38,575 ------------ Total Earnings $ 172,690 ------------ Ratio of Earnings to Fixed Charges 4.5 ============ - 1 -