<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                           3,275                   2,296                   9,216
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                     0                       0                       0
<PP&E>                                         686,945                 750,158                 783,668
<DEPRECIATION>                                  57,575                  62,124                  66,715
<TOTAL-ASSETS>                                 784,874                 809,021                 813,572
<CURRENT-LIABILITIES>                                0                       0                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                         42                      42                      42
<COMMON>                                           162                     162                     162
<OTHER-SE>                                     369,443                 366,871                 363,360
<TOTAL-LIABILITY-AND-EQUITY>                   369,647                 809,021                 813,572
<SALES>                                         25,899                  52,923                  81,399
<TOTAL-REVENUES>                                26,824                  54,895                  84,514
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                   14,143                  28,844                  44,902
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               5,556                  11,827                  19,225
<INCOME-PRETAX>                                  7,125                  14,224                  20,387
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                              7,125                  14,224                  20,387
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     7,125                  14,224                  20,387
<EPS-PRIMARY>                                     0.29                    0.59                    0.82
<EPS-DILUTED>                                     0.29                    0.59                    0.82
        

</TABLE>