<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   YEAR
YEAR
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1995             DEC-31-1995             DEC-31-1995
             DEC-31-1994
<PERIOD-END>                               MAR-31-1995             JUN-30-1995             SEP-30-1995             DEC-31-1995
             DEC-31-1994
<CASH>                                           8,130                   6,052                  58,143                  37,289
                   9,131
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                  220,990                 230,221                 256,521                 327,697
                 279,553
<ALLOWANCES>                                         0                       0                       0                       0
                       0
<INVENTORY>                                     26,345                  27,662                  26,116                  23,956
                  26,722
<CURRENT-ASSETS>                               313,875                 324,162                 404,075                 494,431
                 386,841
<PP&E>                                       4,875,268               4,793,590               4,720,041               4,822,879
               4,741,296
<DEPRECIATION>                               2,514,760               2,500,147               2,478,258               2,545,320
               2,497,691
<TOTAL-ASSETS>                               3,628,581               3,441,230               3,336,900               3,511,441
               3,530,686
<CURRENT-LIABILITIES>                          544,488                 381,431                 462,061                 640,125
                 570,201
<BONDS>                                      1,070,433               1,081,488                 771,258                 770,313
                 963,378
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                        87,252                  87,252                  87,252                  87,244
                  87,252
<OTHER-SE>                                   1,316,654               1,310,459               1,414,315               1,395,398
               1,304,634
<TOTAL-LIABILITY-AND-EQUITY>                 3,628,581               3,441,230               3,336,900               3,511,441
               3,530,686
<SALES>                                        228,354                 526,796                 842,970               1,236,953
                 934,588
<TOTAL-REVENUES>                               363,070                 807,776               1,240,358               1,754,341
               1,407,269
<CGS>                                          149,650                 367,546                 612,011                 913,324
                 582,486
<TOTAL-COSTS>                                  187,997                 445,712                 731,822               1,085,209
                 805,387
<OTHER-EXPENSES>                                74,391                 141,051                 208,161                 298,714
                 257,759
<LOSS-PROVISION>                                     0                       0                       0                       0
                       0
<INTEREST-EXPENSE>                              26,781                  54,963                  78,503                  96,257
                  80,290
<INCOME-PRETAX>                                 47,648                  70,744                 283,523                 287,881
                 157,219
<INCOME-TAX>                                    10,031                  15,786                  98,045                  94,993
                  15,812
<INCOME-CONTINUING>                             37,617                  54,958                 185,478                 192,888
                 141,407
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                    37,617                  54,958                 185,478                 192,888
                 141,407
<EPS-PRIMARY>                                      .44                     .64                    2.15                    2.24
                    1.62
<EPS-DILUTED>                                      .44                     .64                    2.15                    2.24
                    1.62
        

</TABLE>