<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>                               DEC-31-1999
<CASH>                                          38,544
<SECURITIES>                                   255,558
<RECEIVABLES>                                   99,525
<ALLOWANCES>                                     2,806
<INVENTORY>                                     24,421
<CURRENT-ASSETS>                               178,667
<PP&E>                                       1,466,985
<DEPRECIATION>                                 782,153
<TOTAL-ASSETS>                               1,138,108
<CURRENT-LIABILITIES>                           69,764
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,353
<OTHER-SE>                                     864,271
<TOTAL-LIABILITY-AND-EQUITY>                 1,138,108
<SALES>                                        135,194
<TOTAL-REVENUES>                               149,581
<CGS>                                          108,058
<TOTAL-COSTS>                                  108,058
<OTHER-EXPENSES>                                 3,671
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 821
<INCOME-PRETAX>                                 34,210
<INCOME-TAX>                                    14,259
<INCOME-CONTINUING>                             20,461
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    20,461
<EPS-BASIC>                                       0.41
<EPS-DILUTED>                                     0.41