<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 2ND QUARTER
1997 FINANCIAL STAEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                           1,996
<SECURITIES>                                         0
<RECEIVABLES>                                   15,484
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                19,572
<PP&E>                                         140,211
<DEPRECIATION>                                  48,007
<TOTAL-ASSETS>                                 117,814
<CURRENT-LIABILITIES>                           11,860
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        65,047
<OTHER-SE>                                       6,172
<TOTAL-LIABILITY-AND-EQUITY>                   117,814
<SALES>                                         36,598
<TOTAL-REVENUES>                                36,598
<CGS>                                           31,434
<TOTAL-COSTS>                                   37,303
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 115
<INCOME-PRETAX>                                  (348)
<INCOME-TAX>                                      (70)
<INCOME-CONTINUING>                              (278)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (278)
<EPS-PRIMARY>                                    (.01)
<EPS-DILUTED>                                    (.01)