<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
June 30, 1996 quarterly consolidated financial statements and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                           3,939
<SECURITIES>                                         0
<RECEIVABLES>                                   69,097
<ALLOWANCES>                                     1,097
<INVENTORY>                                      2,700
<CURRENT-ASSETS>                                95,637
<PP&E>                                         587,394
<DEPRECIATION>                                 155,029
<TOTAL-ASSETS>                                 530,657
<CURRENT-LIABILITIES>                           62,050
<BONDS>                                        223,849
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           311
<OTHER-SE>                                     200,449
<TOTAL-LIABILITY-AND-EQUITY>                   530,657
<SALES>                                              0
<TOTAL-REVENUES>                               347,245
<CGS>                                                0
<TOTAL-COSTS>                                  335,360
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0<F1>
<INTEREST-EXPENSE>                               6,698
<INCOME-PRETAX>                                  5,380
<INCOME-TAX>                                     2,077
<INCOME-CONTINUING>                              3,303
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,303
<EPS-PRIMARY>                                      .11
<EPS-DILUTED>                                      .11
<FN>
<F1>Provision for Doubtful accounts included in costs and expenses applicable
to revenues.
</FN>