<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S BALANCE SHEET AND STATEMENT OF INCOME FOR THE PERIOD ENDED JUNE 30,
1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                         691,899
<SECURITIES>                                 3,236,314
<RECEIVABLES>                               10,368,900
<ALLOWANCES>                                    34,736
<INVENTORY>                                  2,641,133
<CURRENT-ASSETS>                            16,963,143
<PP&E>                                      44,979,255
<DEPRECIATION>                              18,337,717
<TOTAL-ASSETS>                              55,344,312
<CURRENT-LIABILITIES>                        8,184,534
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        95,653
<OTHER-SE>                                  16,884,420
<TOTAL-LIABILITY-AND-EQUITY>                55,344,312
<SALES>                                     33,032,285
<TOTAL-REVENUES>                            33,032,285
<CGS>                                       25,854,782
<TOTAL-COSTS>                               29,619,888
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,207,705
<INCOME-PRETAX>                              2,322,959
<INCOME-TAX>                                   952,412
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 1,370,547
<EPS-PRIMARY>                                      .14
<EPS-DILUTED>                                      .14