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According to Emeritus Professor Reid Bryson, who compiled ice thickness measurements from the 1870s through the 1930s, the ice on Lake Mendota has been over 30 inches thick a few times. At one point during the 1870s the ice was recorded as 35 inches thick, which appears to be the record. On average, the ice on Lake Mendota is approximately 20 inches thick at its peak.

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