WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  

<ARTICLE> 5
<MULTIPLIER> 1,000
<PERIOD-TYPE>                          6-MOS          6-MOS        
<FISCAL YEAR-END>                     DEC-31-1998  DEC-31-1997
<PERIOD-START>                        JAN-01-1998  JAN-01-1997
<PERIOD-END>                          JUN-30-1998  JUN-30-1997
<CASH>                                    24,129       10,485
<SECURITIES>                                   0            0 
<RECEIVABLES>                                  0            0
<ALLOWANCES>                                   0            0
<INVENTORY>                                    0            0
<CURRENT-ASSETS>                          33,510        9,430
<PP&E>                                 1,244,830      745,211
<DEPRECIATION>                            97,459       61,897
<TOTAL-ASSETS>                         1,251,754      683,314
<CURRENT-LIABILITIES>                          0       15,914
<BONDS>                                  648,927      347,897
<PREFERRED-MANDATORY>                          0            0
<PREFERRED>                                   59           20
<COMMON>                                     188          134
<OTHER-SE>                               504,282      294,222
<TOTAL-LIABILITY-AND-EQUITY>           1,251,754      703,229
<SALES>                                  101,043       61,629
<TOTAL-REVENUES>                         103,148       62,559
<CGS>                                     37,764       23,436
<TOTAL-COSTS>                             37,764       23,436
<OTHER-EXPENSES>                          27,794       15,861
<LOSS-PROVISION>                               0            0
<INTEREST-EXPENSE>                        22,664       13,097
<INCOME-PRETAX>                           14,926       10,165
<INCOME-TAX>                                   0            0
<INCOME-CONTINUING>                       13,759        8,987
<DISCONTINUED>                                 0            0
<EXTRAORDINARY>                            (990)            0
<CHANGES>                                      0            0
<NET-INCOME>                              12,769        8,987
<EPS-PRIMARY>                               0.44         0.53
<EPS-DILUTED>                               0.44         0.53