EXHIBIT 13 SHEFFIELD STEEL CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS BEFORE INTEREST, TAXES, DEPRECIATION, AMORTIZATION, AND NON-CASH POST-RETIREMENT BENEFIT EXPENSE (EBITDA) (IN THOUSANDS) Years Ended April 30, ---------------------------------------------- 1996 1997 1998 ------- ------- ------- Net income (loss) before extraordinary item $(3,091) (3,509) 1,302 Interest expense 11,733 11,769 12,300 Income tax expense - - - Depreciation and amortization 6,567 6,775 7,112 Loss on retirement of equipment - - 180 Accrual of post-retirement benefit expense, net of cash paid 1,747 1,272 1,893 ------- ------- ------- EBITDA $16,956 $16,307 $22,787 ======= ======= ======= Restructuring expense - 1,320 - ------- ------- ------- EBITDA, excluding restructuring expense $16,956 $17,627 $22,787 ======= ======= =======