<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM APPLICABLE
FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<CASH> 7,111
<SECURITIES> 0
<RECEIVABLES> 46,741
<ALLOWANCES> 2,329
<INVENTORY> 0
<CURRENT-ASSETS> 68,357
<PP&E> 1,254,843
<DEPRECIATION> (550,007)
<TOTAL-ASSETS> 795,796
<CURRENT-LIABILITIES> 67,581
<BONDS> 306,283
0
17
<COMMON> 430
<OTHER-SE> 279,089
<TOTAL-LIABILITY-AND-EQUITY> 795,796
<SALES> 0
<TOTAL-REVENUES> 189,130
<CGS> 0
<TOTAL-COSTS> 166,021
<OTHER-EXPENSES> (168)
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 24,819
<INCOME-PRETAX> (817)
<INCOME-TAX> 3,100
<INCOME-CONTINUING> (16,902)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (16,902)
<EPS-BASIC> (0.40)
<EPS-DILUTED> (0.40)
</TABLE>