WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  

<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S.DOLLARS
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<EXCHANGE-RATE>                                      1
<CASH>                                          20,511
<SECURITIES>                                     5,863
<RECEIVABLES>                                  325,585
<ALLOWANCES>                                    17,191
<INVENTORY>                                    144,197
<CURRENT-ASSETS>                               554,694
<PP&E>                                       8,451,424
<DEPRECIATION>                               3,155,210
<TOTAL-ASSETS>                               6,654,091
<CURRENT-LIABILITIES>                          701,841
<BONDS>                                      2,193,153
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    170,086
<COMMON>                                       153,045
<OTHER-SE>                                   2,103,853
<TOTAL-LIABILITY-AND-EQUITY>                 6,654,091
<SALES>                                      2,369,491
<TOTAL-REVENUES>                             2,369,491
<CGS>                                        1,296,453
<TOTAL-COSTS>                                1,749,181
<OTHER-EXPENSES>                                 9,280
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             184,070
<INCOME-PRETAX>                                449,369
<INCOME-TAX>                                   168,073
<INCOME-CONTINUING>                            281,296
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   281,296
<EPS-PRIMARY>                                     2.30
<EPS-DILUTED>                                     2.30