<TABLE> <S> <C>

<ARTICLE>                                          5
<RESTATED>
<MULTIPLIER>                                                    1,000
       
<S>                                                  <C>                   <C>
<PERIOD-TYPE>                                                    Year                        Year
<FISCAL-YEAR-END>                                         Dec-31-1996                 Dec-31-1995
<PERIOD-END>                                              Dec-31-1996                 Dec-31-1995
<CASH>                                                         15,284                      21,477
<SECURITIES>                                                        0                       5,004
<RECEIVABLES>                                                 193,659                     133,190
<ALLOWANCES>                                                        0                           0
<INVENTORY>                                                    12,285                       5,488
<CURRENT-ASSETS>                                              227,617                     181,431
<PP&E>                                                      2,049,356                   1,783,163
<DEPRECIATION>                                                804,715                     652,985
<TOTAL-ASSETS>                                              1,515,063                   1,359,125
<CURRENT-LIABILITIES>                                         231,370                     146,192
<BONDS>                                                       573,455                     557,107
<PREFERRED-MANDATORY>                                               0                           0
<PREFERRED>                                                         0                           0
<COMMON>                                                        6,307                       6,598
<OTHER-SE>                                                    591,423                     556,023
<TOTAL-LIABILITY-AND-EQUITY>                                1,515,063                   1,359,125
<SALES>                                                       517,211                     406,280
<TOTAL-REVENUES>                                              517,211                     406,280
<CGS>                                                          42,600                      46,328
<TOTAL-COSTS>                                                 396,335                     421,281
<OTHER-EXPENSES>                                                3,745                     (90,791)
<LOSS-PROVISION>                                                    0                           0
<INTEREST-EXPENSE>                                             44,842                      52,978
<INCOME-PRETAX>                                                54,856                       1,044
<INCOME-TAX>                                                   25,895                       2,782
<INCOME-CONTINUING>                                            25,895                      (1,738)
<DISCONTINUED>                                                      0                           0
<EXTRAORDINARY>                                                     0                           0
<CHANGES>                                                           0                           0
<NET-INCOME>                                                   25,895                      (1,738)
<EPS-PRIMARY>                                                    0.46 <F1>                  (0.03) <F1>
<EPS-DILUTED>                                                    0.46 <F1>                  (0.03) <F1>
<FN>
<F1> Earnings per share has been restated to reflect the Company's adoption of
     Statement of Financial Accounting Standards No. 128, "Earnings Per Share."
</FN>
        


</TABLE>