(Beaver Dam) The ice on Beaver Dam Lake is officially open. That’s according to Dick McMillan of the Beaver Dam Lake Improvement Association who says the ice on the lake officially opened up Tuesday. The declaration comes each year when a boat can travel from the dam on the south end of the lake to the Highway G bridge on the north end. The earliest the ice was opened was on February 28 in 1998. The latest was April 20 in both 1923 and 1972. Last year, the ice opened on March 8.