<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998
<PERIOD-START>                             JAN-01-1999             JAN-01-1998
<PERIOD-END>                               MAR-31-1999             MAR-31-1998
<CASH>                                          15,300                       0
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  225,100                 154,600
<ALLOWANCES>                                    17,300                  15,600
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                               273,600                 184,200
<PP&E>                                       1,884,300               1,256,400
<DEPRECIATION>                                 492,900                 429,900
<TOTAL-ASSETS>                               2,788,300               1,488,200
<CURRENT-LIABILITIES>                          700,700               2,430,200
<BONDS>                                        557,400                  61,400
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                         1,800                       0
<OTHER-SE>                                   1,342,700              (1,112,700)
<TOTAL-LIABILITY-AND-EQUITY>                 2,788,300               1,488,200
<SALES>                                              0                       0
<TOTAL-REVENUES>                               403,500                 300,800
<CGS>                                                0                       0
<TOTAL-COSTS>                                  244,700                 185,900
<OTHER-EXPENSES>                                79,400                  55,900
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              11,300                   5,400
<INCOME-PRETAX>                                 70,600                  54,400
<INCOME-TAX>                                    27,200                  19,600
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    43,400                  34,800
<EPS-PRIMARY>                                      .25                     .36
<EPS-DILUTED>                                      .25                     .36