<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SEPTEMBER
30, 1999 FORM 10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                           5,935
<SECURITIES>                                         0
<RECEIVABLES>                                   81,169
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               110,382
<PP&E>                                       1,537,550
<DEPRECIATION>                                 563,732
<TOTAL-ASSETS>                               1,125,075
<CURRENT-LIABILITIES>                          100,666
<BONDS>                                        652,190
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           312
<OTHER-SE>                                     371,431
<TOTAL-LIABILITY-AND-EQUITY>                 1,125,075
<SALES>                                        284,991
<TOTAL-REVENUES>                               294,994
<CGS>                                          131,541
<TOTAL-COSTS>                                  131,541
<OTHER-EXPENSES>                               107,722
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              44,321
<INCOME-PRETAX>                                 11,410
<INCOME-TAX>                                   (2,930)
<INCOME-CONTINUING>                             14,340
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,340
<EPS-BASIC>                                      .25
<EPS-DILUTED>                                      .25