<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1999 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                       2,145,707
<SECURITIES>                                         0
<RECEIVABLES>                               32,428,251
<ALLOWANCES>                                   269,150
<INVENTORY>                                    301,907
<CURRENT-ASSETS>                            39,449,184
<PP&E>                                     186,011,130
<DEPRECIATION>                              43,873,074
<TOTAL-ASSETS>                             182,039,688
<CURRENT-LIABILITIES>                       28,277,285
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        93,870
<OTHER-SE>                                  70,108,176
<TOTAL-LIABILITY-AND-EQUITY>               182,039,688
<SALES>                                    166,363,356
<TOTAL-REVENUES>                           166,363,356
<CGS>                                                0
<TOTAL-COSTS>                              150,526,684
<OTHER-EXPENSES>                              (31,885)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,655,558
<INCOME-PRETAX>                             14,212,999
<INCOME-TAX>                                 5,571,497
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 8,641,502
<EPS-BASIC>                                       0.93
<EPS-DILUTED>                                     0.92