<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 1996 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                           2,479
<SECURITIES>                                         0
<RECEIVABLES>                                   12,408
<ALLOWANCES>                                         0
<INVENTORY>                                        518
<CURRENT-ASSETS>                                15,962
<PP&E>                                         371,734
<DEPRECIATION>                                 284,173
<TOTAL-ASSETS>                                 103,598
<CURRENT-LIABILITIES>                           19,384
<BONDS>                                         18,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           893
<OTHER-SE>                                      65,321
<TOTAL-LIABILITY-AND-EQUITY>                   103,598
<SALES>                                         60,610
<TOTAL-REVENUES>                                64,891
<CGS>                                           14,776
<TOTAL-COSTS>                                   48,056
<OTHER-EXPENSES>                                 (335)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               3,440
<INCOME-PRETAX>                                 13,730
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             13,730
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    13,730
<EPS-PRIMARY>                                     1.77
<EPS-DILUTED>                                        0