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

  

<ARTICLE> 5
       
                                                         
<PERIOD-TYPE>                    12-MOS           6-MOS           6-MOS
<FISCAL-YEAR-END>               DEC-31-96       DEC-31-97       DEC-31-98
<PERIOD-END>                    DEC-31-96       JUN-30-97       JUN-30-98
<CASH>                             41,569          17,604         476,612
<SECURITIES>                            0               0               0
<RECEIVABLES>                   3,069,358       1,980,991       2,655,946
<ALLOWANCES>                       28,130          28,130          28,130
<INVENTORY>                             0               0               0
<CURRENT-ASSETS>                3,090,337       2,076,721       3,215,312
<PP&E>                         47,511,081      55,746,290      75,846,338
<DEPRECIATION>                 12,576,560      14,369,433      18,307,417 
<TOTAL-ASSETS>                 38,098,169      43,531,533      60,827,531 
<CURRENT-LIABILITIES>           2,738,820       1,917,824       3,950,964 
<BONDS>                         8,521,391      10,577,610      18,291,610  
<COMMON>                          174,063         178,091         181,320 
<PREFERRED-MANDATORY>                   0               0               0
<PREFERRED>                             0               0          60,000
<OTHER-SE>                     24,544,072      27,852,813      35,035,458 
<TOTAL-LIABILITY-AND-EQUITY>   38,098,169      43,531,533      60,827,531 
<SALES>                                 0               0               0          
<TOTAL-REVENUES>               14,167,470       6,695,381       4,565,703 
<CGS>                                   0               0               0
<TOTAL-COSTS>                   6,945,168       3,652,304       3,584,479 
<OTHER-EXPENSES>                  (64,191)        (12,181)        (42,534)
<LOSS-PROVISION>                        0               0               0         
<INTEREST-EXPENSE>              1,237,726         372,314         645,625
<INCOME-PRETAX>                 6,048,767       2,682,944         378,133
<INCOME-TAX>                    1,718,113         885,372         124,695
<INCOME-CONTINUING>             4,330,654       1,797,572         253,438
<DISCONTINUED>                          0               0               0             
<EXTRAORDINARY>                         0               0               0             
<CHANGES>                               0               0               0             
<NET-INCOME>                    4,330,654       1,797,572         253,438
<EPS-PRIMARY>                         .29             .10            .010
<EPS-DILUTED>                         .28             .10            .013