For those who want to watch and interact dates around Lake Michigan Lake levels go to Great Lakes Water Level Dashboard.
Food for thought: Lake Michigan & Lake Huron contain about 3 quadtrillion gallons of water. One inch of rise or fall of Lake Michigan account for approx. 352 Billion gallons of water. According to US Army Corp the dredging of the Lake St.Clair channel accounts for a permanent 12 to 16 inch reduction of Lake Michigan/Huron. FYI three years after the past 1964 low lake level the lake recovered 3 feet by 1967.