<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                                                                                            

<PERIOD-TYPE>                   YEAR                   YEAR                   3-MOS                   6-MOS
9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1995             DEC-31-1996             DEC-31-1996
             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1995             JAN-01-1996             JAN-01-1996
             JAN-01-1996
<PERIOD-END>                               DEC-31-1996             DEC-31-1995             MAR-31-1996             JUN-30-1996
             SEP-30-1996
<CASH>                                           2,479                   1,303                   1,065                   1,210
                   1,241
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                   12,408                   8,537                   8,664                   9,641
                   8,603
<ALLOWANCES>                                         0                       0                       0                       0
                       0
<INVENTORY>                                        518                     565                     471                     445
                     418
<CURRENT-ASSETS>                                15,962                  10,910                  10,515                  11,861
                  10,897
<PP&E>                                         371,734                 341,679                 346,827                 355,251
                 363,067
<DEPRECIATION>                                 284,173                 259,533                 265,154                 272,512
                 278,377
<TOTAL-ASSETS>                                 103,598                  93,161                  92,249                  94,672
                  95,647
<CURRENT-LIABILITIES>                           19,384                  24,627                  25,374                  17,057
                  16,456
<BONDS>                                         18,000                  33,538                  30,358                  38,528
                  36,522
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                           893                     741                     745                     748
                     749
<OTHER-SE>                                      65,321                  34,255                  35,772                  38,339
                  41,920
<TOTAL-LIABILITY-AND-EQUITY>                   103,598                  93,161                  92,249                  94,672
                  95,647
<SALES>                                         60,610                  43,883                  12,368                  27,517
                  42,136
<TOTAL-REVENUES>                                64,891                  49,271                  13,332                  29,466
                  45,050
<CGS>                                           14,776                  13,533                   3,598                   7,161
                  10,808
<TOTAL-COSTS>                                   48,056                  57,879                  10,993                  23,720
                  35,014
<OTHER-EXPENSES>                                 (335)                 (6,022)                    (47)                    (40)
                    (60)
<LOSS-PROVISION>                                     0                       0                       0                       0
                       0
<INTEREST-EXPENSE>                               3,440                   5,493                     982                   1,943
                   2,783
<INCOME-PRETAX>                                 13,730                 (8,079)                   1,404                   3,843
                   7,313
<INCOME-TAX>                                         0                       0                       0                       0
                       0
<INCOME-CONTINUING>                             13,730                 (8,079)                   1,404                   3,843
                   7,313
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                    13,730                 (8,079)                   1,404                   3,843
                   7,313
<EPS-PRIMARY>                                     1.80                  (1.31)                     .19                     .51
                     .97
<EPS-DILUTED>                                     1.76                  (1.31)                     .19                     .51
                     .95