<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S REPORT ON FORM 10-Q FOR THE SIX-MONTH PERIOD ENDED JUNE 30, 2000
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 1,614,103
<SECURITIES> 0
<RECEIVABLES> 29,282,923
<ALLOWANCES> 285,099
<INVENTORY> 424,865
<CURRENT-ASSETS> 37,299,642
<PP&E> 195,143,904
<DEPRECIATION> 47,407,184
<TOTAL-ASSETS> 185,499,365
<CURRENT-LIABILITIES> 26,889,592
<BONDS> 0
92,803
0
<COMMON> 0
<OTHER-SE> 70,819,687
<TOTAL-LIABILITY-AND-EQUITY> 185,499,365
<SALES> 113,492,892
<TOTAL-REVENUES> 113,492,892
<CGS> 0
<TOTAL-COSTS> 109,215,996
<OTHER-EXPENSES> 2,984,655
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 2,855,049
<INCOME-PRETAX> 1,292,241
<INCOME-TAX> 506,559
<INCOME-CONTINUING> 0
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 785,682
<EPS-BASIC> 0.08
<EPS-DILUTED> 0.08
</TABLE>