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

  

<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                             289
<SECURITIES>                                         0
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<PP&E>                                         617,736
<DEPRECIATION>                                 137,204
<TOTAL-ASSETS>                                 495,554
<CURRENT-LIABILITIES>                           64,852
<BONDS>                                         93,000
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<COMMON>                                        46,978
<OTHER-SE>                                     270,083
<TOTAL-LIABILITY-AND-EQUITY>                   495,554
<SALES>                                        599,169
<TOTAL-REVENUES>                               601,931
<CGS>                                          408,456
<TOTAL-COSTS>                                  534,962
<OTHER-EXPENSES>                                     0
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<NET-INCOME>                                    39,210
<EPS-BASIC>                                       0.83
<EPS-DILUTED>                                     0.82