Marcel Lake Dam, located in Duvall, Washington, is a privately-owned structure used primarily for recreation. Completed in 1964, this earth dam stands at a structural height of 22 feet with a hydraulic height of 31 feet, creating a storage capacity of 750 acre-feet and a surface area of 32 acres. The dam, situated on Essency Creek, plays a crucial role in regulating water flow and providing water storage for the surrounding area.

With a fair condition assessment and a high hazard potential, Marcel Lake Dam is regulated and inspected by the Washington Department of Ecology to ensure its safety and functionality. The last inspection in July 2020 revealed that the dam is in need of regular maintenance and monitoring to mitigate potential risks. Despite its age, the dam continues to serve its purpose effectively, offering recreational opportunities and contributing to water resource management in the region.

As a key component of the water infrastructure in King County, Marcel Lake Dam plays a vital role in flood control and water supply management. Its location in the beautiful natural surroundings of Duvall makes it a popular destination for outdoor enthusiasts and nature lovers. With proper maintenance and oversight, this dam will continue to provide important benefits for the community while safeguarding against potential hazards associated with its operation.