Collins Marsh, also known as Mud Creek, is a state-owned water resource located in Manitowoc, Wisconsin. This marsh serves primarily for recreational purposes, offering a serene setting for outdoor enthusiasts to enjoy. The dam at Collins Marsh, completed in 1965, stands at a height of 10 feet and spans 800 feet in length, with a storage capacity of 7,000 acre-feet and a surface area of 2,000 acres. The controlled spillway ensures proper water management, with a maximum discharge of 4,470 cubic feet per second.

Although classified as having a low hazard potential, the risk assessment for Collins Marsh indicates a very high risk level, emphasizing the need for proactive management and monitoring. The dam's condition is currently not rated, with the last inspection conducted in August 2011. The Emergency Action Plan (EAP) was last revised in January 2016, highlighting the importance of preparedness in case of emergencies. With state regulation, permitting, inspection, and enforcement in place, Collins Marsh serves as a vital water resource for the community, showcasing the intersection of water conservation and climate resilience.