<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM JUNE 30,
1999 FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BE REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                         213,013
<SECURITIES>                                         0
<RECEIVABLES>                                   17,663
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               255,268
<PP&E>                                       1,049,952
<DEPRECIATION>                                 478,950
<TOTAL-ASSETS>                                 937,678
<CURRENT-LIABILITIES>                           73,165
<BONDS>                                        408,962
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    370,967
<COMMON>                                           359
<OTHER-SE>                                      73,286
<TOTAL-LIABILITY-AND-EQUITY>                   937,678
<SALES>                                        108,792
<TOTAL-REVENUES>                               108,792
<CGS>                                           38,162
<TOTAL-COSTS>                                   38,162
<OTHER-EXPENSES>                                30,656
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              11,937
<INCOME-PRETAX>                                 22,484
<INCOME-TAX>                                     9,714
<INCOME-CONTINUING>                             12,770
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    12,770
<EPS-BASIC>                                     (0.03)
<EPS-DILUTED>                                   (0.03)