<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1997             MAR-31-1997
<PERIOD-START>                             APR-01-1997             APR-01-1997
<PERIOD-END>                               SEP-30-1997             SEP-30-1997
<CASH>                                           6,742                       0
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   60,414                       0
<ALLOWANCES>                                         0                       0
<INVENTORY>                                      4,754                       0
<CURRENT-ASSETS>                                80,048                       0
<PP&E>                                         188,268                       0
<DEPRECIATION>                                  44,142                       0
<TOTAL-ASSETS>                                 241,403                       0
<CURRENT-LIABILITIES>                           41,625                       0
<BONDS>                                         60,216                       0<F1>
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           150                       0
<OTHER-SE>                                     123,313                       0
<TOTAL-LIABILITY-AND-EQUITY>                   241,403                       0
<SALES>                                        115,378                 223,311
<TOTAL-REVENUES>                                     0                       0
<CGS>                                                0                       0
<TOTAL-COSTS>                                  106,542                 206,440
<OTHER-EXPENSES>                                   (6)                    (17)
<LOSS-PROVISION>                                   323                     627
<INTEREST-EXPENSE>                               1,544                   3,127
<INCOME-PRETAX>                                  7,298                  13,762
<INCOME-TAX>                                     2,920                   5,505
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     4,377                   8,256
<EPS-PRIMARY>                                      .33                     .65
<EPS-DILUTED>                                      .33                     .65
<FN> 
<F1> BOND TAG IS FOR LONG-TERM DEBT.
</FN>