<ARTICLE>                         5
<LEGEND>
The schedule contains summary financial information extracted from the condensed
balance sheet as of June 30, 1996 and the condensed statement of income for the
six months ended June 30, 1996 and is qualified in its entirety by refernce to
such financial statements.  Inventory, as classified on the condensed balance
sheet, includes real-estate held for sale.
</LEGEND>
<MULTIPLIER>                                     1,000
       
                                                 
<PERIOD-TYPE>                                    6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                             724
<SECURITIES>                                    21,882
<RECEIVABLES>                                  169,703
<ALLOWANCES>                                     8,813
<INVENTORY>                                    103,072
<CURRENT-ASSETS>                               335,959
<PP&E>                                       1,927,769
<DEPRECIATION>                                 826,877
<TOTAL-ASSETS>                               1,805,931
<CURRENT-LIABILITIES>                          252,176
<BONDS>                                        375,516
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        37,107
<OTHER-SE>                                     606,185
<TOTAL-LIABILITY-AND-EQUITY>                 1,805,931
<SALES>                                        557,055
<TOTAL-REVENUES>                               566,968
<CGS>                                          456,462
<TOTAL-COSTS>                                  456,462
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              17,186
<INCOME-PRETAX>                                 39,300
<INCOME-TAX>                                    14,339
<INCOME-CONTINUING>                             24,961
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    24,961
<EPS-PRIMARY>                                      .55
<EPS-DILUTED>                                      .55