<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