<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE 6 MONTHS CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED INCOME STATEMENT FOR THE PERIOD ENDING JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 985,864 <SECURITIES> 0 <RECEIVABLES> 3,765,533 <ALLOWANCES> (330,836) <INVENTORY> 46,385 <CURRENT-ASSETS> 7,472,834 <PP&E> 61,168,316 <DEPRECIATION> 21,910,752 <TOTAL-ASSETS> 49,620,778 <CURRENT-LIABILITIES> 9,571,167 <BONDS> 5,825,503 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1,004,370 <OTHER-SE> 14,779,559 <TOTAL-LIABILITY-AND-EQUITY> 49,620,778 <SALES> 11,226,426 <TOTAL-REVENUES> 12,168,935 <CGS> 5,584,585 <TOTAL-COSTS> 9,618,623 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 67,442 <INTEREST-EXPENSE> 399,523 <INCOME-PRETAX> 1,353,778 <INCOME-TAX> 543,500 <INCOME-CONTINUING> 810,278 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 810,278 <EPS-PRIMARY> 0.81 <EPS-DILUTED> 0.81