<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated statement of earnings and the consolidated balance sheets and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<EXCHANGE-RATE>                                      1
<CASH>                                         170,268
<SECURITIES>                                         0
<RECEIVABLES>                                  118,615
<ALLOWANCES>                                    19,222
<INVENTORY>                                     43,944
<CURRENT-ASSETS>                               283,823
<PP&E>                                       1,671,260
<DEPRECIATION>                                 725,676
<TOTAL-ASSETS>                               1,401,441
<CURRENT-LIABILITIES>                          142,567
<BONDS>                                        320,167
<PREFERRED-MANDATORY>                           29,343
<PREFERRED>                                          0
<COMMON>                                        22,486
<OTHER-SE>                                     532,757
<TOTAL-LIABILITY-AND-EQUITY>                 1,401,441
<SALES>                                        412,148
<TOTAL-REVENUES>                               541,347
<CGS>                                          302,147
<TOTAL-COSTS>                                  409,332
<OTHER-EXPENSES>                                48,450
<LOSS-PROVISION>                                 9,878
<INTEREST-EXPENSE>                              16,950
<INCOME-PRETAX>                                 56,737
<INCOME-TAX>                                    21,788
<INCOME-CONTINUING>                             34,949
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                 46,960
<CHANGES>                                        8,193
<NET-INCOME>                                    90,102
<EPS-PRIMARY>                                     4.01<F1>
<EPS-DILUTED>                                     3.97<F2>
<FN>
<F1>EPS - Primary is EPS Basic per SFAS 128
<F2>EPS - Fully Diluted is EPS - Diluted per SFAS 128
</FN>