<ARTICLE> 5 <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> 139,353 <CGS> 108,058 <TOTAL-COSTS> 108,058 <OTHER-EXPENSES> 3,671 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 821 <INCOME-PRETAX> 23,982 <INCOME-TAX> 10,372 <INCOME-CONTINUING> 14,120 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 14,120 <EPS-BASIC> .29 <EPS-DILUTED> .28