<TABLE> <S> <C>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 3-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JUL-01-2000 JUL-01-1999
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 1,144 4,868
<SECURITIES> 0 0
<RECEIVABLES> 21,895 21,923
<ALLOWANCES> 657 685
<INVENTORY> 2,390 2,282
<CURRENT-ASSETS> 42,315 45,634
<PP&E> 839,966 795,441
<DEPRECIATION> 264,757 244,723
<TOTAL-ASSETS> 660,914 642,272
<CURRENT-LIABILITIES> 75,616 60,893
<BONDS> 169,470 171,092
0 0
3,475 3,475
<COMMON> 199,533 194,655
<OTHER-SE> 0 0
<TOTAL-LIABILITY-AND-EQUITY> 660,914 642,272
<SALES> 76,580 72,280
<TOTAL-REVENUES> 76,580 72,280
<CGS> 57,937 54,932
<TOTAL-COSTS> 57,937 54,932
<OTHER-EXPENSES> (358) (319)
<LOSS-PROVISION> 136 168
<INTEREST-EXPENSE> 3,935 3,535
<INCOME-PRETAX> 15,066 14,132
<INCOME-TAX> 5,861 5,426
<INCOME-CONTINUING> 9,205 8,706
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 9,205 8,706
<EPS-BASIC> 0.60 0.57
<EPS-DILUTED> 0.60 0.57
</TABLE>