<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM BALANCE
SHEET INCOME STATEMENT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 9,207
<SECURITIES> 0
<RECEIVABLES> 46,156
<ALLOWANCES> 0
<INVENTORY> 6,461
<CURRENT-ASSETS> 70,248
<PP&E> 243,510
<DEPRECIATION> 47,860
<TOTAL-ASSETS> 304,741
<CURRENT-LIABILITIES> 69,768
<BONDS> 92,986
0
0
<COMMON> 53
<OTHER-SE> 85,701
<TOTAL-LIABILITY-AND-EQUITY> 304,741
<SALES> 107,765
<TOTAL-REVENUES> 107,765
<CGS> 91,660
<TOTAL-COSTS> 91,660
<OTHER-EXPENSES> 238
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 5,272
<INCOME-PRETAX> 10,595
<INCOME-TAX> 3,905
<INCOME-CONTINUING> 6,690
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 6,690
<EPS-BASIC> 1.55
<EPS-DILUTED> 1.50
</TABLE>