<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED CONDENSED BALANCE SHEET AS OF JUNE 30, 2000 AND THE
CONSOLIDATED CONDENSED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED
JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          24,876
<SECURITIES>                                       811
<RECEIVABLES>                                   98,503
<ALLOWANCES>                                     4,543
<INVENTORY>                                          0
<CURRENT-ASSETS>                               142,582
<PP&E>                                       1,103,382
<DEPRECIATION>                                 456,761
<TOTAL-ASSETS>                               1,056,586
<CURRENT-LIABILITIES>                           76,300
<BONDS>                                        645,925
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        12,941
<OTHER-SE>                                     296,579
<TOTAL-LIABILITY-AND-EQUITY>                 1,056,586
<SALES>                                              0
<TOTAL-REVENUES>                               160,913
<CGS>                                                0
<TOTAL-COSTS>                                  158,435
<OTHER-EXPENSES>                                 9,447
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              29,035
<INCOME-PRETAX>                               (30,542)
<INCOME-TAX>                                   (6,184)
<INCOME-CONTINUING>                           (24,358)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (24,358)
<EPS-BASIC>                                    (.31)
<EPS-DILUTED>                                    (.31)