<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-2001
<PERIOD-START>                             APR-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                           4,001
<SECURITIES>                                         0
<RECEIVABLES>                                   65,174
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               109,941
<PP&E>                                         284,009
<DEPRECIATION>                                 156,983
<TOTAL-ASSETS>                                 328,669
<CURRENT-LIABILITIES>                          128,412
<BONDS>                                          8,726
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           554
<OTHER-SE>                                     180,208
<TOTAL-LIABILITY-AND-EQUITY>                   328,669
<SALES>                                              0
<TOTAL-REVENUES>                               195,780
<CGS>                                           81,032
<TOTAL-COSTS>                                  152,880
<OTHER-EXPENSES>                                   705
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 42,195
<INCOME-TAX>                                    16,042
<INCOME-CONTINUING>                             26,804
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    26,804
<EPS-BASIC>                                        .48
<EPS-DILUTED>                                      .46