<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> SEP-30-1999 <EXCHANGE-RATE> 1 <CASH> 6,594 <SECURITIES> 0 <RECEIVABLES> 14,965 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 22,618 <PP&E> 292,854 <DEPRECIATION> 133,217 <TOTAL-ASSETS> 192,475 <CURRENT-LIABILITIES> 11,005 <BONDS> 25,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 113 <OTHER-SE> 140,900 <TOTAL-LIABILITY-AND-EQUITY> 192,475 <SALES> 48,853 <TOTAL-REVENUES> 49,918 <CGS> 13,135 <TOTAL-COSTS> 13,135 <OTHER-EXPENSES> 886 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 860 <INCOME-PRETAX> 7,324 <INCOME-TAX> 2,515 <INCOME-CONTINUING> 4,809 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,809 <EPS-BASIC> 0.44 <EPS-DILUTED> 0.44