<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from consolidated
financial statements and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                           3,905
<SECURITIES>                                         0
<RECEIVABLES>                                   33,047
<ALLOWANCES>                                         0
<INVENTORY>                                      1,184
<CURRENT-ASSETS>                                51,247
<PP&E>                                          64,125
<DEPRECIATION>                                  22,309
<TOTAL-ASSETS>                                  97,467
<CURRENT-LIABILITIES>                           30,125
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         4,162
<OTHER-SE>                                      61,432
<TOTAL-LIABILITY-AND-EQUITY>                    97,467
<SALES>                                        149,421
<TOTAL-REVENUES>                               149,421
<CGS>                                          121,513
<TOTAL-COSTS>                                  126,045
<OTHER-EXPENSES>                                 (183)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  76
<INCOME-PRETAX>                                 23,483
<INCOME-TAX>                                     8,787
<INCOME-CONTINUING>                             14,696
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,696
<EPS-PRIMARY>                                     1.26
<EPS-DILUTED>                                     1.25