<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF INCOME AND THE CONSOLIDATED STATEMENT OF FINANCIAL 
POSITION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL 
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          39,713
<SECURITIES>                                         0
<RECEIVABLES>                                  452,665
<ALLOWANCES>                                    18,661
<INVENTORY>                                     65,112
<CURRENT-ASSETS>                               722,476
<PP&E>                                       4,287,259
<DEPRECIATION>                               1,520,994
<TOTAL-ASSETS>                               4,404,062
<CURRENT-LIABILITIES>                          770,645
<BONDS>                                      1,415,494
<PREFERRED-MANDATORY>                          504,869
<PREFERRED>                                          0
<COMMON>                                           788
<OTHER-SE>                                   1,219,217
<TOTAL-LIABILITY-AND-EQUITY>                 4,404,062
<SALES>                                              0
<TOTAL-REVENUES>                               701,460
<CGS>                                                0
<TOTAL-COSTS>                                  582,330
<OTHER-EXPENSES>                              (12,079)
<LOSS-PROVISION>                                 7,507
<INTEREST-EXPENSE>                              25,370
<INCOME-PRETAX>                                117,194
<INCOME-TAX>                                    36,684
<INCOME-CONTINUING>                             80,510
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    80,510
<EPS-PRIMARY>                                     1.03
<EPS-DILUTED>                                      .97