<ARTICLE> 5
<LEGEND>
This schedule contains summary finanical information extracted from the
March 31, 1998 quaterly consolidated financial statements and is qualified
in its entirety by reference to such finanical statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                              JAN-1-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           3,812
<SECURITIES>                                         0
<RECEIVABLES>                                   87,263
<ALLOWANCES>                                     1,846
<INVENTORY>                                      3,067
<CURRENT-ASSETS>                               121,508
<PP&E>                                         720,295
<DEPRECIATION>                                 244,481
<TOTAL-ASSETS>                                 599,360
<CURRENT-LIABILITIES>                           90,306
<BONDS>                                        216,511
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           316
<OTHER-SE>                                     230,272
<TOTAL-LIABILITY-AND-EQUITY>                   599,360
<SALES>                                              0
<TOTAL-REVENUES>                               230,649
<CGS>                                                0
<TOTAL-COSTS>                                  221,344
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0<F1>
<INTEREST-EXPENSE>                               4,086
<INCOME-PRETAX>                                  5,331
<INCOME-TAX>                                     2,159
<INCOME-CONTINUING>                              3,172
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,172
<EPS-PRIMARY>                                      .10
<EPS-DILUTED>                                      .10
<FN>
<F1>Provision for Doubtful accounts included in costs and expenses applicalbe
to revenues.
</FN>