<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM YEAR END
1997 FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           3,080
<SECURITIES>                                         0
<RECEIVABLES>                                   17,654
<ALLOWANCES>                                       650
<INVENTORY>                                          0
<CURRENT-ASSETS>                                23,869
<PP&E>                                         144,423
<DEPRECIATION>                                  51,030
<TOTAL-ASSETS>                                 123,382
<CURRENT-LIABILITIES>                           12,913
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        65,047
<OTHER-SE>                                       8,372
<TOTAL-LIABILITY-AND-EQUITY>                   123,382
<SALES>                                         81,450
<TOTAL-REVENUES>                                81,450
<CGS>                                           66,777
<TOTAL-COSTS>                                   79,442
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 302
<INCOME-PRETAX>                                  2,718
<INCOME-TAX>                                       796
<INCOME-CONTINUING>                              1,922
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,922
<EPS-PRIMARY>                                      .06
<EPS-DILUTED>                                      .06