<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
unaudited Consolidated Balance Sheet at September 30, 1996 and the unaudited
Consolidated Statement of Income for the nine months 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>                                           7,346
<SECURITIES>                                         0
<RECEIVABLES>                                   27,275
<ALLOWANCES>                                   (1,092)
<INVENTORY>                                      1,641
<CURRENT-ASSETS>                                38,770
<PP&E>                                         877,853
<DEPRECIATION>                               (235,029)
<TOTAL-ASSETS>                                 688,400
<CURRENT-LIABILITIES>                           34,787
<BONDS>                                        327,870
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           278
<OTHER-SE>                                     255,599
<TOTAL-LIABILITY-AND-EQUITY>                   688,400
<SALES>                                        131,713
<TOTAL-REVENUES>                               134,654
<CGS>                                           32,705
<TOTAL-COSTS>                                  114,810
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              20,202
<INCOME-PRETAX>                                 19,844
<INCOME-TAX>                                     6,548
<INCOME-CONTINUING>                             13,296
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    13,296
<EPS-PRIMARY>                                      .48
<EPS-DILUTED>                                      .48