Maple Lake in Oneida, Wisconsin, is a gravity dam completed in 1941 primarily for recreational purposes, offering a surface area of 144 acres and a maximum storage capacity of 1330 acre-feet. The dam stands at a height of 12 feet, with a hydraulic height of 7 feet, and a length of 85 feet. The lake's drainage area is one square mile, with a controlled spillway type and a maximum discharge capacity of 170 cubic feet per second.

Despite its fair condition assessment and high hazard potential, Maple Lake is regulated by the Wisconsin Department of Natural Resources, with state permitting, inspection, and enforcement in place. The dam's emergency action plan status is unclear, but its risk assessment indicates a very high risk level. Located in the Detroit District, Maple Lake's risk management measures and inundation maps are currently unavailable, warranting careful monitoring and maintenance to ensure the safety and sustainability of this water resource for future generations.