<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>                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-END>                               JUN-30-1998
<CASH>                                          11,201
<SECURITIES>                                         0
<RECEIVABLES>                                  118,105
<ALLOWANCES>                                       240
<INVENTORY>                                          0
<CURRENT-ASSETS>                               140,039
<PP&E>                                         340,889
<DEPRECIATION>                                 153,448
<TOTAL-ASSETS>                                 344,109
<CURRENT-LIABILITIES>                           92,734
<BONDS>                                         68,543
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         6,004
<OTHER-SE>                                     161,289
<TOTAL-LIABILITY-AND-EQUITY>                   344,109
<SALES>                                         98,911
<TOTAL-REVENUES>                                98,911
<CGS>                                           77,424
<TOTAL-COSTS>                                   77,424
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 567
<INCOME-PRETAX>                                 10,605
<INCOME-TAX>                                     4,030
<INCOME-CONTINUING>                              6,575
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,575
<EPS-PRIMARY>                                      .29
<EPS-DILUTED>                                      .28