<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>

                             
<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
<PREFERRED-MANDATORY>                           92,803
<PREFERRED>                                          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