1 EXHIBIT 99.1 WASHINGTON GAS LIGHT COMPANY AND SUBSIDIARIES Computation of Ratio of Earnings to Fixed Charges and Preferred Stock Dividends Twelve Months Ended June 30, 1999 (Unaudited) (Dollars in Thousands) PRE-TAX PREFERRED STOCK DIVIDENDS: Preferred Dividends $ 1,332 Effective Income Tax Rate 0.3775 Complement of Effective Income Tax Rate (1 - Tax Rate) 0.6225 Pre-Tax Preferred Dividends $ 2,140 ========== FIXED CHARGES: Interest Expense $ 37,760 Amortization of Debt Premium, Discount and Expense 475 Interest Component of Rentals 12 ---------- Total Fixed Charges 38,247 Pre-tax Preferred Dividends 2,140 ---------- Total $ 40,387 ========== EARNINGS: Net Income $ 66,794 Add: Income Taxes Applicable to Operating Income 38,832 Income Taxes Applicable to Other Income - Net 1,672 Total Fixed Charges 40,387 ---------- Total Earnings $ 147,685 ========== Ratio of Earnings to Fixed Charges and Preferred Stock Dividends 3.7 ========== 31