<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                             101                     173                     712                   9,669
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                   18,634                  18,312                  22,828                  29,416
<ALLOWANCES>                                         0                       0                       0                       0
<INVENTORY>                                          0                       0                       0                       0
<CURRENT-ASSETS>                                27,263                  27,314                  32,526                  10,673
<PP&E>                                         316,227                 356,030                 376,805                 523,711
<DEPRECIATION>                                       0                       0                       0                       0
<TOTAL-ASSETS>                                 354,179                 391,674                 417,523                 585,925
<CURRENT-LIABILITIES>                           38,248                  42,411                  41,621                  43,013
<BONDS>                                        144,533                 175,135                 196,581                 272,932
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                           183                     183                     184                     226
<OTHER-SE>                                     156,596                 158,527                 163,153                 248,710
<TOTAL-LIABILITY-AND-EQUITY>                   354,179                 391,674                 417,523                 585,925
<SALES>                                         28,342                  57,477                  94,373                 138,698
<TOTAL-REVENUES>                                28,468                  57,753                  94,792                 139,381
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                   23,044                  46,209                  75,827                 108,675
<OTHER-EXPENSES>                                  (111)                   (237)                   (380)                   (650)
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                               2,636                   5,913                   9,503                  13,367
<INCOME-PRETAX>                                  2,899                   5,868                   9,842                  17,989
<INCOME-TAX>                                     1,081                   2,188                   3,671                   6,711
<INCOME-CONTINUING>                                  0                       0                       0                       0
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                     1,818                   3,680                   6,171                  11,278
<EPS-PRIMARY>                                      .10                     .20                     .34                     .60
<EPS-DILUTED>                                      .10                     .20                     .33                     .57
        

</TABLE>