WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>
                              
<ARTICLE>                          5
<CIK>                              0000033213
<MULTIPLIER>                       1000
                                    
<S>                                <C>
<PERIOD-TYPE>                      3-MOS
<FISCAL-YEAR-END>                  DEC-31-1996
<PERIOD-END>                       JUN-30-1996
<CASH>                                 26,053
<SECURITIES>                                0
<RECEIVABLES>                         249,743
<ALLOWANCES>                           13,635
<INVENTORY>                            18,302
<CURRENT-ASSETS>                      367,924
<PP&E>                              2,156,872
<DEPRECIATION>                        702,405
<TOTAL-ASSETS>                      1,949,832
<CURRENT-LIABILITIES>                 374,157
<BONDS>                               415,870
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<COMMON>                              217,470
<OTHER-SE>                            519,845
<TOTAL-LIABILITY-AND-EQUITY>        1,949,832
<SALES>                               391,767
<TOTAL-REVENUES>                      391,767
<CGS>                                       0
<TOTAL-COSTS>                         382,784
<OTHER-EXPENSES>                            0
<LOSS-PROVISION>                        1,507
<INTEREST-EXPENSE>                      9,938
<INCOME-PRETAX>                         1,731
<INCOME-TAX>                              803
<INCOME-CONTINUING>                       928
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                              928
<EPS-PRIMARY>                               0.03
<EPS-DILUTED>                               0.03
        
 

</TABLE>
