Mill Pond, located in Marin County, California, is a federal-owned structure managed by the National Park Service. Built in 1956, this Earth dam stands at a height of 20 feet and spans 280 feet in length, with a storage capacity of 21 acre-feet. The pond covers an area of 5.5 acres and serves as a significant water resource in the region. While the dam has a spillway width of 1 foot, it does not have any associated locks or drainage area.

Despite its age, the condition assessment of Mill Pond is marked as "Not Available" with a significant hazard potential. The last inspection conducted was in June 2014, with an inspection frequency of 0. The Emergency Action Plan (EAP) was last revised in June 2017, and the structure meets guidelines for emergency preparedness. With its location in the San Francisco District and under the jurisdiction of the National Park Service, Mill Pond remains a key component of the water infrastructure in the area, attracting enthusiasts interested in water resources and climate management.