<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FILED AS PART OF THE COMPANY'S 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>                          MAR-31-2001
<PERIOD-START>                             APR-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                           5,880
<SECURITIES>                                         0
<RECEIVABLES>                                  117,980
<ALLOWANCES>                                       510
<INVENTORY>                                          0
<CURRENT-ASSETS>                               146,707
<PP&E>                                         503,455
<DEPRECIATION>                                 185,586
<TOTAL-ASSETS>                                 488,231
<CURRENT-LIABILITIES>                           84,264
<BONDS>                                        172,500
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         6,004
<OTHER-SE>                                     194,311
<TOTAL-LIABILITY-AND-EQUITY>                   488,231
<SALES>                                        204,503
<TOTAL-REVENUES>                               204,503
<CGS>                                          170,757
<TOTAL-COSTS>                                  170,757
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               3,562
<INCOME-PRETAX>                                 10,653
<INCOME-TAX>                                     3,838
<INCOME-CONTINUING>                              6,815
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,815
<EPS-BASIC>                                        .30
<EPS-DILUTED>                                      .29