<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           3,152
<SECURITIES>                                         0
<RECEIVABLES>                                  186,913
<ALLOWANCES>                                     5,340
<INVENTORY>                                     14,956
<CURRENT-ASSETS>                               227,559
<PP&E>                                       2,035,091
<DEPRECIATION>                               1,185,546
<TOTAL-ASSETS>                               1,294,444
<CURRENT-LIABILITIES>                          200,951
<BONDS>                                        509,523
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       250,000
<OTHER-SE>                                     125,344
<TOTAL-LIABILITY-AND-EQUITY>                 1,294,444
<SALES>                                        160,315
<TOTAL-REVENUES>                               160,315
<CGS>                                           70,821
<TOTAL-COSTS>                                  128,533
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,613
<INCOME-PRETAX>                                 23,078
<INCOME-TAX>                                     7,857
<INCOME-CONTINUING>                             15,221
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,221
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0