<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
condensed financial statements for the nine month period ended September 30,
1996, and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<CASH>                                           1,087
<SECURITIES>                                         0
<RECEIVABLES>                                   20,184
<ALLOWANCES>                                     2,208
<INVENTORY>                                          0
<CURRENT-ASSETS>                                33,833
<PP&E>                                       1,362,617
<DEPRECIATION>                                 297,205
<TOTAL-ASSETS>                               1,112,858
<CURRENT-LIABILITIES>                           94,207
<BONDS>                                        619,207
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         8,398
<OTHER-SE>                                     365,067
<TOTAL-LIABILITY-AND-EQUITY>                 1,112,858
<SALES>                                              0
<TOTAL-REVENUES>                               340,682
<CGS>                                                0
<TOTAL-COSTS>                                  165,488
<OTHER-EXPENSES>                                47,352
<LOSS-PROVISION>                                   842
<INTEREST-EXPENSE>                              31,045
<INCOME-PRETAX>                                 82,020
<INCOME-TAX>                                    30,347
<INCOME-CONTINUING>                             51,673
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                    409
<CHANGES>                                            0
<NET-INCOME>                                    51,264
<EPS-PRIMARY>                                      .63
<EPS-DILUTED>                                      .63