<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FILED AS PART OF THE COMPANY'S 10Q AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-START>                             APR-01-1999
<PERIOD-END>                               Dec-31-1999
<CASH>                                          11,104
<SECURITIES>                                         0
<RECEIVABLES>                                  110,990
<ALLOWANCES>                                       500
<INVENTORY>                                          0
<CURRENT-ASSETS>                               142,421
<PP&E>                                         449,459
<DEPRECIATION>                                 192,130
<TOTAL-ASSETS>                                 419,443
<CURRENT-LIABILITIES>                           94,141
<BONDS>                                        110,073
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         6,004
<OTHER-SE>                                     187,019
<TOTAL-LIABILITY-AND-EQUITY>                   419,443
<SALES>                                        305,777
<TOTAL-REVENUES>                               305,777
<CGS>                                          251,612
<TOTAL-COSTS>                                  251,612
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               4,461
<INCOME-PRETAX>                                 20,539
<INCOME-TAX>                                     7,394
<INCOME-CONTINUING>                             13,145
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    13,145
<EPS-BASIC>                                        .58
<EPS-DILUTED>                                      .57