<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> MAR-31-1997 <CASH> 18,341 <SECURITIES> 0 <RECEIVABLES> 6,290 <ALLOWANCES> 0 <INVENTORY> 698 <CURRENT-ASSETS> 25,937 <PP&E> 128,496 <DEPRECIATION> 88,055 <TOTAL-ASSETS> 160,289 <CURRENT-LIABILITIES> 10,687 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 575 <COMMON> 17,402 <OTHER-SE> (15,057) <TOTAL-LIABILITY-AND-EQUITY> 160,289 <SALES> 18,120 <TOTAL-REVENUES> 18,120 <CGS> 14,371 <TOTAL-COSTS> 16,323 <OTHER-EXPENSES> (629) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 145 <INCOME-PRETAX> 2,281 <INCOME-TAX> (160) <INCOME-CONTINUING> 1,359 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,359 <EPS-PRIMARY> .02 <EPS-DILUTED> .02