<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>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                          57,838
<SECURITIES>                                         0
<RECEIVABLES>                                  313,831
<ALLOWANCES>                                    18,726
<INVENTORY>                                     28,033
<CURRENT-ASSETS>                               527,267      
<PP&E>                                       3,390,971     
<DEPRECIATION>                               1,266,882   
<TOTAL-ASSETS>                               3,008,578     
<CURRENT-LIABILITIES>                          600,907   
<BONDS>                                      1,048,268 
<COMMON>                                           670
<PREFERRED-MANDATORY>                           96,511
<PREFERRED>                                          0
<OTHER-SE>                                     755,915      
<TOTAL-LIABILITY-AND-EQUITY>                 3,008,578        
<SALES>                                              0         
<TOTAL-REVENUES>                             1,150,148         
<CGS>                                                0         
<TOTAL-COSTS>                                  997,637         
<OTHER-EXPENSES>                               (2,493)      
<LOSS-PROVISION>                                12,796     
<INTEREST-EXPENSE>                              39,345      
<INCOME-PRETAX>                                119,163      
<INCOME-TAX>                                    34,902     
<INCOME-CONTINUING>                             84,261     
<DISCONTINUED>                                  37,771 
<EXTRAORDINARY>                                      0     
<CHANGES>                                            0 
<NET-INCOME>                                   122,032
<EPS-PRIMARY>                                     1.83
<EPS-DILUTED>                                        0