<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM BALANCE
SHEET AS OF JUNE 30, 2000 AND STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED
JUNE 30, 2000.

<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                          16,773
<SECURITIES>                                         0
<RECEIVABLES>                                   82,612
<ALLOWANCES>                                     1,714
<INVENTORY>                                      3,596
<CURRENT-ASSETS>                               103,769
<PP&E>                                       2,524,674
<DEPRECIATION>                               1,754,358
<TOTAL-ASSETS>                                 980,982
<CURRENT-LIABILITIES>                          101,423
<BONDS>                                        983,230
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                     77,852
<COMMON>                                         1,433
<OTHER-SE>                                   (199,265)
<TOTAL-LIABILITY-AND-EQUITY>                   980,982
<SALES>                                        249,124
<TOTAL-REVENUES>                               251,983
<CGS>                                          155,007
<TOTAL-COSTS>                                  197,684
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                               (1,504)
<INTEREST-EXPENSE>                              42,677
<INCOME-PRETAX>                                 54,299
<INCOME-TAX>                                     1,463
<INCOME-CONTINUING>                             52,836
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    52,836
<EPS-BASIC>                                        .53
<EPS-DILUTED>                                      .36