<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from SEC Form
10-Q for quarter ending June 30, 1998 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          12,431
<SECURITIES>                                         0
<RECEIVABLES>                                   36,607
<ALLOWANCES>                                     1,371
<INVENTORY>                                      6,641
<CURRENT-ASSETS>                                63,209
<PP&E>                                         517,633
<DEPRECIATION>                                  86,123
<TOTAL-ASSETS>                                 587,748
<CURRENT-LIABILITIES>                           58,936
<BONDS>                                        320,173
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           124
<OTHER-SE>                                     148,898
<TOTAL-LIABILITY-AND-EQUITY>                   587,748
<SALES>                                        125,706
<TOTAL-REVENUES>                               125,706
<CGS>                                           88,584
<TOTAL-COSTS>                                  109,802
<OTHER-EXPENSES>                                 1,575
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               6,968
<INCOME-PRETAX>                                  7,361
<INCOME-TAX>                                     3,165
<INCOME-CONTINUING>                              4,196
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                  (299)
<CHANGES>                                            0
<NET-INCOME>                                     3,897
<EPS-PRIMARY>                                      .32
<EPS-DILUTED>                                      .32