EXHIBIT 12 ROCHESTER GAS AND ELECTRIC CORPORATION COMPUTATION OF SEC RATIO OF EARNINGS TO FIXED CHARGES (Thousand of Dollars) Year Ended December 31, -------------------------------------------- 2000 1999 1998 1997 1996 ---- ---- ---- ---- ---- EARNINGS - -------- Net Income - Continuing Operations $95,529 $94,488 $94,138 $95,360 $97,511 Add: Income Taxes (net), Continuing Operations 59,672 63,310 61,901 61,575 66,051 -------------------------------------------- Pretax Income 155,201 157,798 156,039 156,935 163,562 Fixed Charges 69,453 63,317 52,474 56,903 63,132 -------------------------------------------- Earnings (as defined) $224,654 $221,115 $208,513 $213,838 $226,694 ============================================ FIXED CHARGES - ------------- Interest Charges on Long Term Debt $56,673 $53,067 $43,306 $44,615 $48,618 DOE Liability * 5,548 4,177 4,305 4,204 3,981 Amortization of Debt Premium, Discount and Expense 1,647 1,723 1,536 1,772 3,504 Other Interest 3,921 2,820 1,852 4,904 5,824 Rentals ** 1,664 1,530 1,475 1,408 1,205 -------------------------------------------- Total Fixed Charges $69,453 $63,317 $52,474 $56,903 $63,132 ============================================ RATIO OF EARNINGS TO FIXED CHARGES (times) 3.23 3.49 3.97 3.76 3.59 - --------------------------------------- * Long term liability to Federal Department of Energy for nuclear waste disposal. ** Rentals deemed representative of the interest factor included in rent expense.