<ARTICLE> 5
<RESTATED>
       
                                                                                          
<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>                                   171,928             1,615,571              3,912,880           6,340,991
<SECURITIES>                                   0                     0                      0                   0
<RECEIVABLES>                         13,900,893            13,428,312             13,544,755          12,930,377
<ALLOWANCES>                                   0                     0                      0             313,000
<INVENTORY>                              910,334               861,692                827,745             810,180
<CURRENT-ASSETS>                      22,451,926            22,632,509             24,182,499          24,640,572
<PP&E>                                99,075,325           100,062,241            109,803,590         110,917,370
<DEPRECIATION>                        22,665,280            25,539,333             26,880,978          30,000,203
<TOTAL-ASSETS>                       102,100,079           100,243,330            110,484,015         108,670,910
<CURRENT-LIABILITIES>                 28,666,724            27,159,292             31,081,402          30,440,094
<BONDS>                               25,476,647            22,623,591             25,638,420          21,837,713
<PREFERRED-MANDATORY>                          0                     0                      0                   0
<PREFERRED>                                    0                     0                      0                   0
<COMMON>                                  64,218                64,218                 64,960              64,960
<OTHER-SE>                            36,899,490            38,696,229             41,285,233          43,018,143
<TOTAL-LIABILITY-AND-EQUITY>         102,100,079           100,243,330            110,484,015         108,670,910
<SALES>                                        0                     0                      0                   0
<TOTAL-REVENUES>                      38,794,178            80,019,437            122,483,298         164,666,098
<CGS>                                          0                     0                      0                   0
<TOTAL-COSTS>                         36,997,546            74,443,937            112,575,321         151,270,580
<OTHER-EXPENSES>                               0                     0                      0                   0
<LOSS-PROVISION>                               0                     0                      0                   0
<INTEREST-EXPENSE>                       687,111             1,370,804              2,084,498           2,823,839
<INCOME-PRETAX>                        1,112,179             4,210,918              7,864,989          10,661,899
<INCOME-TAX>                             467,000             1,769,000              3,304,000           4,368,000
<INCOME-CONTINUING>                      645,179             2,441,918              4,560,989           6,293,899
<DISCONTINUED>                                 0                     0                      0                   0
<EXTRAORDINARY>                                0                     0                      0                   0
<CHANGES>                                      0                     0                      0                   0
<NET-INCOME>                             645,179             2,441,918              4,560,989           6,293,899
<EPS-PRIMARY>                               0.10                  0.38                   0.71                0.98
<EPS-DILUTED>                               0.10                  0.36                   0.68                0.94