Plymouth, located in Sheboygan, Wisconsin, is home to a gravity dam on the Mullet River that was completed in 1951 for recreational purposes. The dam stands at a height of 14 feet with a hydraulic height of 9 feet and a structural height of 14 feet, creating a reservoir with a storage capacity of 110 acre-feet and a normal storage of 70 acre-feet. With a surface area of 36 acres and a drainage area of 58.6 square miles, the dam has a maximum discharge capacity of 550 cubic feet per second and a spillway type classified as controlled.

Despite its age, the Plymouth dam has a low hazard potential and was assessed to be in fair condition as of May 2020. The risk assessment for the dam is very high, with a ranking of 1, indicating the importance of ongoing monitoring and maintenance. The last inspection took place in October 2013, with regular inspections scheduled every 10 years. With its picturesque location and recreational purpose, the Plymouth dam serves as a vital asset for both the local community and visitors, highlighting the intersection of water resource management and climate resilience in the region.