<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                          28,300
<SECURITIES>                                         0
<RECEIVABLES>                                  279,700
<ALLOWANCES>                                    12,800
<INVENTORY>                                     11,600
<CURRENT-ASSETS>                               360,700
<PP&E>                                       1,790,800
<DEPRECIATION>                                 823,500
<TOTAL-ASSETS>                               1,583,500
<CURRENT-LIABILITIES>                          418,800
<BONDS>                                        385,300
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        67,000
<OTHER-SE>                                     445,800
<TOTAL-LIABILITY-AND-EQUITY>                 1,583,500
<SALES>                                              0
<TOTAL-REVENUES>                               362,100
<CGS>                                                0
<TOTAL-COSTS>                                  187,900
<OTHER-EXPENSES>                               101,600
<LOSS-PROVISION>                                 2,500
<INTEREST-EXPENSE>                               9,600
<INCOME-PRETAX>                                 64,500
<INCOME-TAX>                                    22,800
<INCOME-CONTINUING>                             41,700
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    41,700
<EPS-PRIMARY>                                      .62
<EPS-DILUTED>                                      .61