<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
FORM 10Q SEPTEMBER 1994 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1994
<PERIOD-END>                               SEP-30-1994
<CASH>                                           41882
<SECURITIES>                                    701220
<RECEIVABLES>                                   263805
<ALLOWANCES>                                      3078
<INVENTORY>                                      47691
<CURRENT-ASSETS>                                     0
<PP&E>                                         2273104
<DEPRECIATION>                                 1005433
<TOTAL-ASSETS>                                 2506079
<CURRENT-LIABILITIES>                                0
<BONDS>                                         752529
<COMMON>                                         10000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                      698784
<TOTAL-LIABILITY-AND-EQUITY>                   2506079
<SALES>                                          97688
<TOTAL-REVENUES>                                684693
<CGS>                                            53288
<TOTAL-COSTS>                                   540690
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                  1868
<INTEREST-EXPENSE>                               33297
<INCOME-PRETAX>                                 108838
<INCOME-TAX>                                     39354
<INCOME-CONTINUING>                              69484
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     69484
<EPS-PRIMARY>                                     1.70
<EPS-DILUTED>                                     1.70