<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>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                         122,791
<SECURITIES>                                         0
<RECEIVABLES>                                  170,882
<ALLOWANCES>                                    17,713
<INVENTORY>                                     36,005
<CURRENT-ASSETS>                               384,314
<PP&E>                                       1,541,168
<DEPRECIATION>                                 683,468
<TOTAL-ASSETS>                               1,373,834
<CURRENT-LIABILITIES>                          213,740
<BONDS>                                        292,787
<COMMON>                                        20,443
<PREFERRED-MANDATORY>                           29,335
<PREFERRED>                                          0
<OTHER-SE>                                     449,586
<TOTAL-LIABILITY-AND-EQUITY>                 1,373,834
<SALES>                                        280,261
<TOTAL-REVENUES>                               342,919
<CGS>                                          206,072
<TOTAL-COSTS>                                  258,575
<OTHER-EXPENSES>                                19,315
<LOSS-PROVISION>                                 6,713
<INTEREST-EXPENSE>                               8,532
<INCOME-PRETAX>                                 49,784
<INCOME-TAX>                                    18,861
<INCOME-CONTINUING>                             30,923
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                 (1,465)
<CHANGES>                                            0
<NET-INCOME>                                    29,458
<EPS-PRIMARY>                                     1.44<F1>
<EPS-DILUTED>                                     1.43<F2>
<FN>
<F1>  EPS - Primary is EPS Basic per SFAS 128
<F2>  EPS - Fully Diluted is EPS - Diluted per SFAS 128
</FN>