<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> MAR-31-1998 <CASH> 48,458 <SECURITIES> 0 <RECEIVABLES> 5,430 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 54,524 <PP&E> 104,682 <DEPRECIATION> 69,399 <TOTAL-ASSETS> 186,198 <CURRENT-LIABILITIES> 9,958 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 575 <COMMON> 17,402 <OTHER-SE> 12,478 <TOTAL-LIABILITY-AND-EQUITY> 186,198 <SALES> 16,962 <TOTAL-REVENUES> 16,962 <CGS> 10,196 <TOTAL-COSTS> 16,198 <OTHER-EXPENSES> (1,375) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 55 <INCOME-PRETAX> 2,062 <INCOME-TAX> 0 <INCOME-CONTINUING> 2,062 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2,062 <EPS-PRIMARY> .12 <EPS-DILUTED> .12