The San Diego Dam Outlet was the design of a new box outlet at the San Diego Dam in El Paso. The existing outlet and dam were constructed to only retain a small fraction of water and then to control the outlet flow. Over time, due to flooding in much of the regions below grade of the dam, Stubbs Engineering was retained to design a new box outlet to fully utilize the retainage of the existing dam. The new box outlet is 10ft. x 10ft. x 30ft high with a water tight door at the base for maintenance and knockout areas in the wall around the structure for release of retained water in the future. The structure was reinforced concrete with a mat foundation.