<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> YEAR 3-MOS
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-2000
<PERIOD-START> JAN-01-1999 JAN-01-2000
<PERIOD-END> DEC-31-1999 MAR-31-2000
<CASH> 32,117 19,538
<SECURITIES> 0 0
<RECEIVABLES> 41,665 36,738
<ALLOWANCES> (1,196) (1,203)
<INVENTORY> 17,497 14,941
<CURRENT-ASSETS> 94,440 78,529
<PP&E> 422,941 432,976
<DEPRECIATION> (196,010) (203,546)
<TOTAL-ASSETS> 343,429 328,954
<CURRENT-LIABILITIES> (84,216) (69,248)
<BONDS> 0 0
82,970 (85,685)
0 0
<COMMON> (1,067) (1,078)
<OTHER-SE> 123,953 122,115
<TOTAL-LIABILITY-AND-EQUITY> (343,429) (328,954)
<SALES> (375,530) (97,469)
<TOTAL-REVENUES> (375,530) (97,469)
<CGS> 317,488 77,044
<TOTAL-COSTS> 362,911 87,739
<OTHER-EXPENSES> (4,625) (772)
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 21,241 8,764
<INCOME-PRETAX> 3,997 (2,703)
<INCOME-TAX> 1,938 543
<INCOME-CONTINUING> 5,935 (2,160)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 1,373 0
<CHANGES> 0 0
<NET-INCOME> 7,308 (2,160)
<EPS-BASIC> 0 0
<EPS-DILUTED> 0 0
</TABLE>