<ARTICLE> 5
<MULTIPLIER> 1,000

                            
<PERIOD-TYPE>                  3-MOS
<FISCAL-YEAR-END>                                   DEC-31-1998
<PERIOD-END>                                        MAR-31-1998
<CASH>                                              17,854
<SECURITIES>                                        0
<RECEIVABLES>                                       73,434
<ALLOWANCES>                                        0
<INVENTORY>                                         28,102
<CURRENT-ASSETS>                                    13,896
<PP&E>                                              730,796        
<DEPRECIATION>                                      180,507
<TOTAL-ASSETS>                                      1,104,037
<CURRENT-LIABILITIES>                               125,759
<BONDS>                                             395,447
<OTHER-SE>                                          170,953
<COMMON>                                            31,220
<PREFERRED-MANDATORY>                               0
<PREFERRED>                                         3,750
<TOTAL-LIABILITY-AND-EQUITY>                        1,104,037
<SALES>                                             284,198
<TOTAL-REVENUES>                                    284,198
<CGS>                                               209,150
<TOTAL-COSTS>                                       209,150
<OTHER-EXPENSES>                                    55,275
<LOSS-PROVISION>                                    0
<INTEREST-EXPENSE>                                  7,676
<INCOME-PRETAX>                                     15,480
<INCOME-TAX>                                        4,476
<INCOME-CONTINUING>                                 11,004
<DISCONTINUED>                                      0
<EXTRAORDINARY>                                     0
<CHANGES>                                           0
<NET-INCOME>                                        11,004
<EPS-PRIMARY>                                       .58
<EPS-DILUTED>                                       .58