<ARTICLE> 5
<MULTIPLIER> 1000
       
                 
<PERIOD-TYPE>       6-MOS
<FISCAL-YEAR-END>             DEC-31-1996
<PERIOD-END>                  JUN-30-1996
<CASH>                              9,626
<SECURITIES>                            0
<RECEIVABLES>                       3,415
<ALLOWANCES>                            0
<INVENTORY>                           245
<CURRENT-ASSETS>                   18,560
<PP&E>                            154,701
<DEPRECIATION>                     52,609
<TOTAL-ASSETS>                    227,390
<CURRENT-LIABILITIES>              11,295
<BONDS>                                 0
<PREFERRED-MANDATORY>                   0
<PREFERRED>                             0
<COMMON>                           27,817
<OTHER-SE>                        128,059
<TOTAL-LIABILITY-AND-EQUITY>      227,390
<SALES>                            14,731
<TOTAL-REVENUES>                   16,701
<CGS>                               1,510
<TOTAL-COSTS>                       1,510
<OTHER-EXPENSES>                    4,803
<LOSS-PROVISION>                        0
<INTEREST-EXPENSE>                    603
<INCOME-PRETAX>                     8,313
<INCOME-TAX>                        1,519
<INCOME-CONTINUING>                 6,794
<DISCONTINUED>                          0
<EXTRAORDINARY>                         0
<CHANGES>                               0
<NET-INCOME>                        6,794
<EPS-PRIMARY>                        0.79 <F1>
<EPS-DILUTED>                        0.79 <F1>
<FN>     
<F1>
Earnings per share data have been restated for all periods presented to 
give effect for the adoption of Statement of Financial Accounting Standards 
No. 128 "Earnings Per Share." Basic and diluted earnings per share have been 
entered in place of primary and fully diluted, respectively.
</FN>