<ARTICLE> 5
<MULTIPLIER> 1,000,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                              65
<SECURITIES>                                         0
<RECEIVABLES>                                      247
<ALLOWANCES>                                         8
<INVENTORY>                                         68
<CURRENT-ASSETS>                                   474
<PP&E>                                           3,755
<DEPRECIATION>                                   1,052
<TOTAL-ASSETS>                                   4,203
<CURRENT-LIABILITIES>                              444
<BONDS>                                          3,324
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           663
<OTHER-SE>                                       (450)
<TOTAL-LIABILITY-AND-EQUITY>                     4,203
<SALES>                                          1,014
<TOTAL-REVENUES>                                 1,014
<CGS>                                                0
<TOTAL-COSTS>                                      715
<OTHER-EXPENSES>                                    26
<LOSS-PROVISION>                                     3
<INTEREST-EXPENSE>                                  81
<INCOME-PRETAX>                                    189
<INCOME-TAX>                                        76
<INCOME-CONTINUING>                                108
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            2
<NET-INCOME>                                       106
<EPS-BASIC>                                       0.41
<EPS-DILUTED>                                     0.40