<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED>

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                         185,027                 574,282                 480,398
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                6,310,358               5,649,147               5,333,508
<ALLOWANCES>                                   297,000                 291,000                 291,000
<INVENTORY>                                    928,272                 850,620                 962,450
<CURRENT-ASSETS>                             8,335,808               7,671,727               7,745,775
<PP&E>                                      59,959,027              59,685,140              56,809,477
<DEPRECIATION>                            (20,166,748)            (18,958,206)            (17,208,232)
<TOTAL-ASSETS>                              51,685,222              52,072,518              51,139,741
<CURRENT-LIABILITIES>                        5,977,136               6,251,526               5,153,477
<BONDS>                                      3,157,287               1,426,592               1,450,896
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                       710,369                 708,026                 707,630
<OTHER-SE>                                  41,840,430              43,686,374              43,827,738
<TOTAL-LIABILITY-AND-EQUITY>                51,685,222              52,072,518              51,139,741
<SALES>                                     35,577,371              23,686,507              11,678,574
<TOTAL-REVENUES>                            35,577,371              23,686,507              11,678,574
<CGS>                                       24,557,702              16,068,909               8,052,587
<TOTAL-COSTS>                               35,135,230              23,354,544              11,972,122
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                               (8,000)                   2,000                   2,000
<INTEREST-EXPENSE>                              29,852                  11,639                   2,184
<INCOME-PRETAX>                                472,251                 300,017               (324,011)
<INCOME-TAX>                                   257,000                 136,500               (120,000)
<INCOME-CONTINUING>                            215,251                 163,517               (204,011)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                   215,251                 163,157               (204,011)
<EPS-PRIMARY>                                     0.03                    0.02                  (0.03)
<EPS-DILUTED>                                     0.03                    0.02                  (0.03)


</TABLE>