<ARTICLE>                     5
<MULTIPLIER>                                   1000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-2000
<PERIOD-START>                                 JAN-1-2000
<PERIOD-END>                                   JUN-30-2000
<CASH>                                          8342
<SECURITIES>                                       0
<RECEIVABLES>                                  18509
<ALLOWANCES>                                     (36)
<INVENTORY>                                     1409
<CURRENT-ASSETS>                               28717
<PP&E>                                        535762
<DEPRECIATION>                               (236709)
<TOTAL-ASSETS>                                338871
<CURRENT-LIABILITIES>                          24512
<BONDS>                                       268293
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0
<COMMON>                                         227
<OTHER-SE>                                     10847
<TOTAL-LIABILITY-AND-EQUITY>                  338871
<SALES>                                        34785
<TOTAL-REVENUES>                               34785
<CGS>                                              0
<TOTAL-COSTS>                                  29862
<OTHER-EXPENSES>                                 436
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                             16680
<INCOME-PRETAX>                                22117
<INCOME-TAX>                                    (296)
<INCOME-CONTINUING>                            22198
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                 1326
<CHANGES>                                          0
<NET-INCOME>                                   23524
<EPS-BASIC>                                     1.03
<EPS-DILUTED>                                    .50