One of the first major developments at Mermet was the 1962 construction of a system of levees creating a lake. The lake serves as a reservoir and a supply of water to temporarily flood two walk-in duck hunting areas and a duck hunting area with permanent blinds. These permanent blinds are allocated on a no-charge daily draw system. The water in the lake is dropped 2 feet each fall to accommodate duck hunters. After waterfowl season, water is returned to the lake, and due to a normal lack of rainfall run-off, a system of wells and pumps is used to return the lake to pool stage.