<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
                                                                       
<PERIOD-TYPE>                                           YEAR                    YEAR                   YEAR
<FISCAL-YEAR-END>                                    DEC-31-1996             DEC-31-1995            DEC-31-1994  
<PERIOD-END>                                         DEC-31-1996             DEC-31-1995            DEC-31-1994  
<CASH>                                                     1,340                   1,546                      0  
<SECURITIES>                                                   0                       0                      0  
<RECEIVABLES>                                             91,336                  67,395                      0  
<ALLOWANCES>                                              (1,351)                 (1,814)                     0  
<INVENTORY>                                                    0                       0                      0  
<CURRENT-ASSETS>                                         110,857                  83,761                      0  
<PP&E>                                                 2,828,493               2,623,138                      0  
<DEPRECIATION>                                        (1,081,845)               (952,538)                     0  
<TOTAL-ASSETS>                                         1,872,139               1,776,832                      0  
<CURRENT-LIABILITIES>                                    119,137                 130,946                      0  
<BONDS>                                                  115,000                 160,000                      0  
<PREFERRED-MANDATORY>                                    150,000                 150,000                      0  
<PREFERRED>                                                    0                       0                      0  
<COMMON>                                                 126,044                 125,883                      0  
<OTHER-SE>                                               818,173                 806,345                      0  
<TOTAL-LIABILITY-AND-EQUITY>                           1,872,139               1,776,832                      0  
<SALES>                                                        0                       0                      0  
<TOTAL-REVENUES>                                         330,441                 220,851                179,140  
<CGS>                                                          0                       0                      0  
<TOTAL-COSTS>                                            293,618                 227,004                147,111  
<OTHER-EXPENSES>                                          (2,092)                    (64)                   314  
<LOSS-PROVISION>                                               0                       0                      0  
<INTEREST-EXPENSE>                                        22,667                  14,617                 20,919  
<INCOME-PRETAX>                                           16,314                 (19,679)                11,467  
<INCOME-TAX>                                               5,540                  (7,177)                  (334) 
<INCOME-CONTINUING>                                       10,774                 (12,502)                11,801  
<DISCONTINUED>                                                 0                       0                      0  
<EXTRAORDINARY>                                                0                       0                      0  
<CHANGES>                                                      0                       0                      0  
<NET-INCOME>                                              10,774                 (12,502)                11,801  
<EPS-PRIMARY>                                                .09                    (.11)                   .07  
<EPS-DILUTED>                                                .09                    (.11)                   .07