<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE 
STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND THE BALANCE
SHEET AS OF JUNE 30, 1995 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JAN-01-1995
<PERIOD-END>                               JUN-30-1995
<CASH>                                               0
<SECURITIES>                                     4,373
<RECEIVABLES>                                  128,823
<ALLOWANCES>                                     5,983
<INVENTORY>                                      1,340
<CURRENT-ASSETS>                               194,039
<PP&E>                                       1,410,653
<DEPRECIATION>                                 725,302
<TOTAL-ASSETS>                                 897,419
<CURRENT-LIABILITIES>                          224,479
<BONDS>                                        248,442
<COMMON>                                       191,968
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                      18,574
<TOTAL-LIABILITY-AND-EQUITY>                   897,419
<SALES>                                              0
<TOTAL-REVENUES>                               280,180
<CGS>                                                0
<TOTAL-COSTS>                                  244,404
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,334
<INCOME-PRETAX>                                 24,773
<INCOME-TAX>                                     9,651
<INCOME-CONTINUING>                             15,122
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,122
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0