<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996
<PERIOD-START>                             JAN-01-1995             JAN-01-1996
<PERIOD-END>                               JUN-30-1995             JUN-30-1996
<CASH>                                         144,000                 571,000
<SECURITIES>                                   347,000                 436,000
<RECEIVABLES>                                2,109,000               1,492,000
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                             2,630,000               2,499,000
<PP&E>                                      20,614,000              29,613,000
<DEPRECIATION>                             (12,020,000)            (12,371,000)
<TOTAL-ASSETS>                              11,194,000              19,741,000
<CURRENT-LIABILITIES>                          606,000               4,078,000
<BONDS>                                      4,594,000               7,018,000
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                  1,786,000               1,868,000
<COMMON>                                     1,031,000               1,278,000
<OTHER-SE>                                   3,177,000               5,499,000
<TOTAL-LIABILITY-AND-EQUITY>                11,194,000              19,741,000
<SALES>                                      1,827,000               4,848,000
<TOTAL-REVENUES>                             1,898,000               4,894,000
<CGS>                                        1,983,000               2,979,000
<TOTAL-COSTS>                                2,085,000               3,396,000
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                             102,000                 417,000
<INCOME-PRETAX>                               (187,000)              1,498,000
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                           (187,000)              1,498,000
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                  (187,000)              1,498,000
<EPS-PRIMARY>                                     (.03)                    .04
<EPS-DILUTED>                                        0                       0