<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Condensed Consolidated Balance Sheet at September 30, 1995 and the related
Condensed Statement of Consolidated Income for the nine months ended September
30, 1995 and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   9-MOS                   
<FISCAL-YEAR-END>                          DEC-31-1995   
<PERIOD-END>                               SEP-30-1995   
<CASH>                                         131,869   
<SECURITIES>                                   107,827 
<RECEIVABLES>                                   58,688 
<ALLOWANCES>                                         0  
<INVENTORY>                                     70,430  
<CURRENT-ASSETS>                               378,040  
<PP&E>                                       1,638,963  
<DEPRECIATION>                                 844,078  
<TOTAL-ASSETS>                               1,239,480  
<CURRENT-LIABILITIES>                           88,854  
<BONDS>                                        185,000  
<COMMON>                                       137,954  
<PREFERRED-MANDATORY>                                0 
<PREFERRED>                                          0 
<OTHER-SE>                                     458,609 
<TOTAL-LIABILITY-AND-EQUITY>                 1,239,480  
<SALES>                                        534,002  
<TOTAL-REVENUES>                               556,950  
<CGS>                                          429,491<F1>
<TOTAL-COSTS>                                  458,468<F2>
<OTHER-EXPENSES>                                21,542<F3>
<LOSS-PROVISION>                                     0    
<INTEREST-EXPENSE>                               8,324
<INCOME-PRETAX>                                 68,616
<INCOME-TAX>                                    33,091
<INCOME-CONTINUING>                             22,684
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    22,684
<EPS-PRIMARY>                                     0.16
<EPS-DILUTED>                                     0.00
<FN>
<F1>Includes Production costs and Depreciation, depletion and amortization from
    Condensed Statement of Consolidated Income.
<F2>Includes Production costs and Depreciation, depletion and amortization and
    Administrative and general expense from Condensed Statement of Consolidated
    Income.
<F3>Includes Exploration expense and Other expense from Condensed Statement of
    Consolidated Income.
</FN>