<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JUL-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          22,210
<SECURITIES>                                         0
<RECEIVABLES>                                  137,995
<ALLOWANCES>                                     1,190
<INVENTORY>                                     13,304
<CURRENT-ASSETS>                               191,344
<PP&E>                                       1,920,461
<DEPRECIATION>                                 805,121
<TOTAL-ASSETS>                               1,514,950
<CURRENT-LIABILITIES>                          226,863
<BONDS>                                        509,121
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           926
<OTHER-SE>                                     523,880
<TOTAL-LIABILITY-AND-EQUITY>                 1,514,950
<SALES>                                        135,540
<TOTAL-REVENUES>                               136,048
<CGS>                                                0
<TOTAL-COSTS>                                   29,475
<OTHER-EXPENSES>                                68,226
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              13,564
<INCOME-PRETAX>                                 18,328
<INCOME-TAX>                                     8,802
<INCOME-CONTINUING>                              9,526
<DISCONTINUED>                                       0
<EXTRAORDINARY>                               (19,301)
<CHANGES>                                            0
<NET-INCOME>                                   (9,775)
<EPS-PRIMARY>                                    (.11)
<EPS-DILUTED>                                    (.10)