"Ice-out on Beaver Dam Lake happened early on March 16, according to Dick McMillan." "McMillan, who has been maintaining the record most recently, has data going back to 1916 with recorded ice-out dates. His records indicate the earliest date ice has gone off the lake was Feb. 28 in 1998. The latest ice-out date was April 20 in both 1973 and 1972.
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Read the article and thanks to the Daily Citizen in Beaver Dam, Wisconsin.