The Folsom - Mormon Island Auxiliary Dam, located in Sacramento, California, is a key structure managed by the Bureau of Reclamation for flood risk reduction along the Blue Ravine river. Completed in 1955, this earth dam stands at a height of 110 feet and has a storage capacity of 1,120,000 acre-feet to protect the surrounding area from potential flooding events. Despite its high hazard potential, the dam has not been assessed for its current condition, highlighting the importance of regular inspections and maintenance to ensure its continued safety and effectiveness.

In addition to flood risk reduction, the Folsom - Mormon Island Auxiliary Dam serves multiple purposes such as hydroelectric power generation, irrigation, recreation, and water supply for the region. Its association with 11 other structures further emphasizes its critical role in managing water resources and supporting various activities in the area. The dam's location in Folsom, under the jurisdiction of the San Francisco District of the US Army Corps of Engineers, underscores its significance in the local water infrastructure and climate resilience efforts.

While the Folsom - Mormon Island Auxiliary Dam does not have a spillway, its design and construction by the Bureau of Reclamation demonstrate a commitment to effective water management and flood protection. With a high-risk assessment rating and limited information on its current condition, continued monitoring and risk management measures are essential to ensure the safety and reliability of this vital infrastructure in the face of evolving climate challenges.