<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from SEC Form
10-Q for quarter ending June 30, 1999 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                        $ 18,706
<SECURITIES>                                         0
<RECEIVABLES>                                   42,525
<ALLOWANCES>                                     1,141
<INVENTORY>                                      7,299
<CURRENT-ASSETS>                                69,206
<PP&E>                                         578,862
<DEPRECIATION>                                 105,990
<TOTAL-ASSETS>                                 662,647
<CURRENT-LIABILITIES>                           68,268
<BONDS>                                        378,153
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           124
<OTHER-SE>                                     159,191
<TOTAL-LIABILITY-AND-EQUITY>                   662,647
<SALES>                                        146,315
<TOTAL-REVENUES>                               146,315
<CGS>                                          101,337
<TOTAL-COSTS>                                  121,802
<OTHER-EXPENSES>                             ( 14,307)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              12,406
<INCOME-PRETAX>                                 26,414
<INCOME-TAX>                                    10,935
<INCOME-CONTINUING>                             15,479
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                    (  4,903)
<NET-INCOME>                                    10,576
<EPS-BASIC>                                        .88
<EPS-DILUTED>                                      .88