<ARTICLE>  5
<MULTIPLIER>  1000
                 
                        
<PERIOD-TYPE>              9-MOS
<FISCAL-YEAR-END>          DEC-31-1998
<PERIOD-END>               SEP-30-1998
<CASH>                           1,821
<SECURITIES>                         0
<RECEIVABLES>                    2,897
<ALLOWANCES>                         0
<INVENTORY>                        282
<CURRENT-ASSETS>                 6,984
<PP&E>                         205,683
<DEPRECIATION>                  66,845
<TOTAL-ASSETS>                 243,535
<CURRENT-LIABILITIES>            5,776
<BONDS>                              0
<PREFERRED-MANDATORY>                0
<PREFERRED>                          0
<COMMON>                        55,887
<OTHER-SE>                     110,321
<TOTAL-LIABILITY-AND-EQUITY>   243,535
<SALES>                         25,542
<TOTAL-REVENUES>                28,840
<CGS>                            2,870
<TOTAL-COSTS>                    2,870
<OTHER-EXPENSES>                13,609
<LOSS-PROVISION>                     0
<INTEREST-EXPENSE>               1,487
<INCOME-PRETAX>                 12,968
<INCOME-TAX>                     2,708
<INCOME-CONTINUING>             10,260
<DISCONTINUED>                       0
<EXTRAORDINARY>                      0
<CHANGES>                            0
<NET-INCOME>                    10,260
<EPS-PRIMARY>                     1.24
<EPS-DILUTED>                     1.21