<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from SEC Form
10-Q for quarter ending June 30, 1997 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          14,053
<SECURITIES>                                         0
<RECEIVABLES>                                   27,882
<ALLOWANCES>                                     1,215
<INVENTORY>                                      6,535
<CURRENT-ASSETS>                                55,939
<PP&E>                                         449,692
<DEPRECIATION>                                  69,712
<TOTAL-ASSETS>                                 486,638
<CURRENT-LIABILITIES>                           53,161
<BONDS>                                        234,858
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           121
<OTHER-SE>                                     143,791
<TOTAL-LIABILITY-AND-EQUITY>                   486,638
<SALES>                                        131,628
<TOTAL-REVENUES>                               131,628
<CGS>                                           99,840
<TOTAL-COSTS>                                  116,877
<OTHER-EXPENSES>                                 1,529
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               8,261
<INCOME-PRETAX>                                  4,961
<INCOME-TAX>                                     2,034
<INCOME-CONTINUING>                              2,927
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,927
<EPS-PRIMARY>                                      .24
<EPS-DILUTED>                                      .24