It forms Cogswell Reservoir, which has a capacity of with an average storage of, and serves mainly for flood control in conjunction with San Gabriel and Morris Dams downstream.
It forms Cogswell Reservoir. Cogswell Reservoir has a capacity of with an average storage of. Cogswell Reservoir serves mainly for flood control in conjunction with San Gabriel. Cogswell Reservoir serves mainly for flood control in conjunction with Morris Dams downstream.