
<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                          55,746
<SECURITIES>                                         0
<RECEIVABLES>                                  369,383
<ALLOWANCES>                                    13,075
<INVENTORY>                                     10,673
<CURRENT-ASSETS>                               487,209
<PP&E>                                       2,134,460
<DEPRECIATION>                                 682,507
<TOTAL-ASSETS>                               2,073,605
<CURRENT-LIABILITIES>                          476,067
<BONDS>                                        415,692
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       216,778
<OTHER-SE>                                     518,922
<TOTAL-LIABILITY-AND-EQUITY>                 2,073,605
<SALES>                                        640,278
<TOTAL-REVENUES>                               640,278
<CGS>                                                0
<TOTAL-COSTS>                                  570,875
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                 4,533
<INTEREST-EXPENSE>                              10,474
<INCOME-PRETAX>                                 61,098
<INCOME-TAX>                                    22,372
<INCOME-CONTINUING>                             38,726
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    38,726
<EPS-PRIMARY>                                     1.11
<EPS-DILUTED>                                     1.11
        

</TABLE>
