EXHIBIT 99.0 WASHINGTON GAS LIGHT COMPANY AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Twelve Months Ended March 31, 2000 (Unaudited) (Dollars in Thousands) FIXED CHARGES Interest Expense $ 39,820 Amortization of Debt Premium, Discount and Expense 505 Interest Component of Rentals 12 ------------ Total Fixed Charges $ 40,337 ============ EARNINGS Net Income $ 84,031 Add: Income Taxes Applicable to Utility Operating Income 44,250 Income Taxes Applicable to Non-Utility Operating Income 5,465 Income Taxes Applicable to Other Income (Expenses)--Net (604) Total Fixed Charges 40,337 ------------ Total Earnings $ 173,479 ============ Ratio of Earnings to Fixed Charges 4.3 ============ - 1 -