EXHIBIT 99.1 WASHINGTON GAS LIGHT COMPANY AND SUBSIDIARIES --------------------------------------------- Computation of Ratio of Earnings to Fixed Charges and ----------------------------------------------------- Preferred Stock Dividends ------------------------- Twelve Months Ended March 31, 1998 ---------------------------------- (Unaudited) (Dollars in Thousands) PRE-TAX PREFERRED STOCK DIVIDENDS: Preferred Dividends $ 1,332 Effective Income Tax Rate 0.3683 Complement of Effective Income Tax Rate (1 - Tax Rate) 0.6317 Pre-Tax Preferred Dividends $ 2,109 ========= FIXED CHARGES: Interest Expense $ 34,787 Amortization of Debt Premium, Discount and Expense 330 Interest Component of Rentals 10 --------- Total Fixed Charges 35,127 Pre-tax Preferred Dividends 2,109 --------- Total $ 37,236 ========= EARNINGS: Net Income $ 77,304 Add: Income Taxes Applicable to Operating Income 45,162 Income Taxes Applicable to Other Income - Net (89) Total Fixed Charges 35,127 --------- Total Earnings $ 157,504 ========= Ratio of Earnings to Fixed Charges and Preferred Stock Dividends 4.2 =========