EXHIBIT 12.1 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES For the years ended December 31, Nine Months 1991 1992 1993 1994 1995 Ended 9/30/96 -------------------------------------------------------------------------- (Thousands of Dollars) Ratio of earnings to fixed charges COMPUTATION OF EARNINGS Pretax income from continuing operations $ (22,609) $ (77,951) $ (21,670) $ (46,425) $ (13,803) $ 130,843 Less interest capitalized during the period and actual preferred dividend requirements of majority-owned subsidiaries and 50%-owned persons included in fixed charges but not deducted from pretax income 0 0 0 0 0 (2,542) -------------------------------------------------------------------------- Total earnings, before fixed charge addition $ (22,609) $ (77,951) $ (21,670) $ (46,425) $ (13,803) $ 128,301 -------------------------------------------------------------------------- COMPUTATION OF FIXED CHARGES Interest 7,296 28,591 25,906 31,346 27,052 2,646 -------------------------------------------------------------------------- Total fixed charges $ 7,296 $ 28,591 $ 25,906 $ 31,346 $ 27,052 $ 2,646 -------------------------------------------------------------------------- Total earnings and fixed charges $ (15,313) (49,360) $ 4,236 (15,079) $ 13,249 $ 130,947 -------------------------------------------------------------------------- Ratio of earnings to fixed charges (2.10) (1.73) 0.16 (0.48) 0.49 49.49 ========================================================================== Exhibit 12.1