<ARTICLE>                     5
<LEGEND>
The Schedule Contains Summary Financial Information Extracted From The Company's
Consolidated  Financial Statements And Is Qualified In Its Entirety By Reference
To Such Financial Statements.
</LEGEND>
<MULTIPLIER>                                         1
<CURRENCY>                                U.S. Dollars
                                            
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997 
<PERIOD-END>                                   DEC-31-1997 
<EXCHANGE-RATE>                                          1  
<CASH>                                             512,339 
<SECURITIES>                                             0 
<RECEIVABLES>                                   12,392,007 
<ALLOWANCES>                                       457,643 
<INVENTORY>                                        402,076 
<CURRENT-ASSETS>                                15,451,013 
<PP&E>                                          85,470,792 
<DEPRECIATION>                                  20,025,293 
<TOTAL-ASSETS>                                  82,689,796 
<CURRENT-LIABILITIES>                           13,406,976 
<BONDS>                                                  0 
<PREFERRED-MANDATORY>                                    0 
<PREFERRED>                                              0 
<COMMON>                                            99,496 
<OTHER-SE>                                      56,698,239 
<TOTAL-LIABILITY-AND-EQUITY>                    82,689,796 
<SALES>                                                  0 
<TOTAL-REVENUES>                                99,428,693 
<CGS>                                                    0 
<TOTAL-COSTS>                                   81,948,341            
<OTHER-EXPENSES>                                         0 
<LOSS-PROVISION>                                         0 
<INTEREST-EXPENSE>                                  17,829 
<INCOME-PRETAX>                                 17,462,523 
<INCOME-TAX>                                     7,211,000 
<INCOME-CONTINUING>                             10,251,523 
<DISCONTINUED>                                           0 
<EXTRAORDINARY>                                          0 
<CHANGES>                                                0 
<NET-INCOME>                                    10,251,523         
<EPS-PRIMARY>                                         1.03 
<EPS-DILUTED>                                         1.01