<ARTICLE> 5
       
                                        
<PERIOD-TYPE>                              9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          23,849
<SECURITIES>                                         0
<RECEIVABLES>                                    3,171
<ALLOWANCES>                                        50
<INVENTORY>                                        286
<CURRENT-ASSETS>                                27,582
<PP&E>                                         105,746
<DEPRECIATION>                                  59,878
<TOTAL-ASSETS>                                  73,450
<CURRENT-LIABILITIES>                            9,360
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           489
<OTHER-SE>                                      53,269
<TOTAL-LIABILITY-AND-EQUITY>                    73,450
<SALES>                                         12,694
<TOTAL-REVENUES>                                13,739
<CGS>                                            6,463
<TOTAL-COSTS>                                   13,377
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 766
<INCOME-PRETAX>                                    362
<INCOME-TAX>                                        85
<INCOME-CONTINUING>                                277
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       277
<EPS-PRIMARY>                                     0.06
<EPS-DILUTED>                                     0.06