WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  

                                                                      EXHIBIT 27
<ARTICLE>                     5
<MULTIPLIER>                                   1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-END>                                   SEP-30-1999
<CASH>                                              12,125
<SECURITIES>                                             0
<RECEIVABLES>                                        4,231
<ALLOWANCES>                                            53
<INVENTORY>                                            205
<CURRENT-ASSETS>                                    17,522
<PP&E>                                             119,840
<DEPRECIATION>                                      77,436
<TOTAL-ASSETS>                                      60,607
<CURRENT-LIABILITIES>                                9,938
<BONDS>                                                  0
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                              0
<COMMON>                                               488
<OTHER-SE>                                          47,381
<TOTAL-LIABILITY-AND-EQUITY>                        60,607
<SALES>                                             14,519
<TOTAL-REVENUES>                                    15,484
<CGS>                                                6,004
<TOTAL-COSTS>                                       12,411
<OTHER-EXPENSES>                                         0
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                                     456
<INCOME-PRETAX>                                      3,073
<INCOME-TAX>                                           840
<INCOME-CONTINUING>                                  2,233
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                         2,233
<EPS-BASIC>                                         0.46
<EPS-DILUTED>                                         0.46