<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FINANCIAL
STATEMENTS FOR THE PERIOD ENDED MARCH 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          27,858
<SECURITIES>                                    11,143
<RECEIVABLES>                                   46,027
<ALLOWANCES>                                        96
<INVENTORY>                                     13,477
<CURRENT-ASSETS>                               104,673
<PP&E>                                         746,635
<DEPRECIATION>                                 320,904
<TOTAL-ASSETS>                                 614,444
<CURRENT-LIABILITIES>                           72,132
<BONDS>                                        304,616
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         6,756
<OTHER-SE>                                     165,371
<TOTAL-LIABILITY-AND-EQUITY>                   614,444
<SALES>                                              0
<TOTAL-REVENUES>                                93,498
<CGS>                                                0
<TOTAL-COSTS>                                   85,715
<OTHER-EXPENSES>                                 6,987
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               6,987
<INCOME-PRETAX>                                  1,300
<INCOME-TAX>                                       532
<INCOME-CONTINUING>                                768
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                (1,029)
<CHANGES>                                            0
<NET-INCOME>                                     (261)
<EPS-PRIMARY>                                   (0.04)
<EPS-DILUTED>                                   (0.04)<F1><F2>
<FN>
<F1>Amounts inapplicable or not disclosed as a separate line on the Balance 
Sheet or Statement of Income are reported as 0 herein.
<F2>Notes and accounts receivable - trade are reported net of allowances for 
doubtful accounts in the Balance Sheet.
</FN>