<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AS OF DECEMBER 31, 1996 AND THE INCOME STATEMENT FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<PERIOD-TYPE>                                12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                          14,600
<SECURITIES>                                         0
<RECEIVABLES>                                  111,600
<ALLOWANCES>                                     2,500
<INVENTORY>                                     13,600
<CURRENT-ASSETS>                               172,500
<PP&E>                                       2,574,200
<DEPRECIATION>                               1,664,400
<TOTAL-ASSETS>                               1,120,000
<CURRENT-LIABILITIES>                          179,400
<BONDS>                                              0
<PREFERRED-MANDATORY>                          111,100
<PREFERRED>                                          0
<COMMON>                                           900
<OTHER-SE>                                     434,500
<TOTAL-LIABILITY-AND-EQUITY>                 1,120,000
<SALES>                                        582,300
<TOTAL-REVENUES>                               583,300
<CGS>                                          493,800
<TOTAL-COSTS>                                  493,800
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              32,400
<INCOME-PRETAX>                                 58,000
<INCOME-TAX>                                    14,300
<INCOME-CONTINUING>                             42,400
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                (6,000)
<CHANGES>                                            0
<NET-INCOME>                                    36,400
<EPS-PRIMARY>                                   (0.12)
<EPS-DILUTED>                                   (0.12)