<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                                                                       
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                           4,785                   8,462                   7,597
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                     0                       0                       0
<PP&E>                                         660,795               1,303,996               1,325,840
<DEPRECIATION>                                  62,558                  74,363                  87,014
<TOTAL-ASSETS>                                 612,032               1,265,718               1,273,708
<CURRENT-LIABILITIES>                                0                       0                       0
<BONDS>                                        264,780                 567,726                 440,197
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           169                     270                     318
<OTHER-SE>                                     297,446                 568,262                 704,684
<TOTAL-LIABILITY-AND-EQUITY>                   612,032               1,265,718               1,273,708
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                29,472                  83,544                 140,483
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                   13,684                  38,322                  64,980
<OTHER-EXPENSES>                                 6,428                  18,530                  31,425
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               4,186                  13,276                  20,742
<INCOME-PRETAX>                                      0                       0                       0
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                                  0                       0                       0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     4,064                  10,493                  18,753
<EPS-PRIMARY>                                     0.25                    0.49                    0.77
<EPS-DILUTED>                                     0.24                    0.48                    0.76