The Canyon Ferry Dam owned by the US Bureau of Reclamation is a 50 MW concrete gravity structure type dam. The lube oil coolers are in a circular configuration with a diameter of 60 inches. The tubing is one ( 1 ) inch diameter copper nickel tubing with extruded aluminum fins. All seems are brazed and welded by ASME approved welders. The units were pressure tested 125 psi for 1.5 hours.