<ARTICLE> 5
<LEGEND>
RESTATED - SEE NOTE 12 TO THE UNAUDITED CONDENSED CONSOLIDATED FINANCIAL
STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          SEP-30-2000
<PERIOD-START>                             OCT-01-1999
<PERIOD-END>                               MAR-31-2000
<CASH>                                          68,972
<SECURITIES>                                   291,610
<RECEIVABLES>                                   93,373
<ALLOWANCES>                                     2,506
<INVENTORY>                                     24,655
<CURRENT-ASSETS>                               202,324
<PP&E>                                       1,483,037
<DEPRECIATION>                                 805,790
<TOTAL-ASSETS>                               1,190,229
<CURRENT-LIABILITIES>                           66,231
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,353
<OTHER-SE>                                     902,374
<TOTAL-LIABILITY-AND-EQUITY>                 1,190,229
<SALES>                                        275,435
<TOTAL-REVENUES>                               301,429
<CGS>                                          223,569
<TOTAL-COSTS>                                  223,569
<OTHER-EXPENSES>                                 4,052
<LOSS-PROVISION>                                 (300)
<INTEREST-EXPENSE>                               1,622
<INCOME-PRETAX>                                 66,331
<INCOME-TAX>                                    28,142
<INCOME-CONTINUING>                             39,734
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    39,734
<EPS-BASIC>                                        .80
<EPS-DILUTED>                                      .80