The Salt Lake Aqueduct is a 42 mile long pipeline which carries water from Deer Creek Reservoir in Wasatch County to a storage reservoir in Salt Lake City. Thirty-three miles of pipe carries untreated water and 9 miles of pipe carries treated water. Water travels by gravity through the entire length of the pipe. The aqueduct is constructed of 69 inch inside diameter concrete pipe. Each section of pipe is 20 feet in length and weighs 41,300 lbs. It has a 175 CFS (cubic feet per second) or 113 MGD design capacity. Construction of the aqueduct began in 1940 and was completed in 1951.