<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                           3,806
<SECURITIES>                                         0
<RECEIVABLES>                                  163,375
<ALLOWANCES>                                     5,444
<INVENTORY>                                     12,199
<CURRENT-ASSETS>                               193,218
<PP&E>                                       2,020,679
<DEPRECIATION>                               1,197,295
<TOTAL-ASSETS>                               1,200,428
<CURRENT-LIABILITIES>                          171,502
<BONDS>                                        512,797
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       250,000
<OTHER-SE>                                     101,049
<TOTAL-LIABILITY-AND-EQUITY>                 1,200,428
<SALES>                                        149,946
<TOTAL-REVENUES>                               149,946
<CGS>                                           61,484
<TOTAL-COSTS>                                  122,439
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,303
<INCOME-PRETAX>                                 18,540
<INCOME-TAX>                                     6,878
<INCOME-CONTINUING>                             11,662
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    11,662
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0