<ARTICLE> 5
<LEGEND>
This Schedule contains summary financial information extracted from the
financial statements contained in the body of the accompanying Form 10-Q and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                           3,685
<SECURITIES>                                         0
<RECEIVABLES>                                   14,513
<ALLOWANCES>                                         0
<INVENTORY>                                        394
<CURRENT-ASSETS>                                22,202
<PP&E>                                          93,923
<DEPRECIATION>                                  43,985
<TOTAL-ASSETS>                                  72,639
<CURRENT-LIABILITIES>                           12,936
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        11,850
<OTHER-SE>                                      39,358
<TOTAL-LIABILITY-AND-EQUITY>                    72,639
<SALES>                                         61,084
<TOTAL-REVENUES>                                61,084
<CGS>                                                0
<TOTAL-COSTS>                                   57,494
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  69
<INCOME-PRETAX>                                  3,655
<INCOME-TAX>                                     1,436
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,219
<EPS-BASIC>                                       0.32
<EPS-DILUTED>                                     0.32