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Show 88 ONE HUNDRED YEARS OF WATER DEVELOPMENT 2. The Aqueduct Division PHYSICAL FEATURES Location, Capacity and Materials The Salt Lake Aqueduct will extend 40.8 miles from the Deer Creek dam into Salt Lake Valley. It will follow the Provo River below the dam, to avoid the hazard of mud and snow slides, to the Olmsted tunnel at the mouth of Provo Canyon. From the tunnel the aqueduct traverses the bench above the Pleasant Grove district to the Alpine- Draper tunnel, and from Draper will extend north to a reservoir near Salt Lake City. Its capacity is 150 cubic feet of water per second. The aqueduct is constructed of reinforced concrete, precast in 20- foot segments weighing 22 to 23 tons each. The inside diameter is 69 inches, and the walls are 7% inches thick. Pipe segments are joined by use of a specially designed expansion joint utilizing a rubber gasket. Exhaustive tests in- Hampion C. Godbe dicate unusually long life for the joints, together with an exceptionally low loss by leakage and absorption. The pipe is being laid in a trench, backfilled, with a minimum of three feet of cover. The Olmsted Tunnel The Olmsted tunnel at the mouth of Provo Canyon is complete. It is 3600 feet long, concrete lined in horseshoe shaped sections 6* 4 fee^ in diameter. It was begun in January, 1939 and completed November 13, 1939, by the George K. Thompson Company of Los Angeles, California. Alpine- Draper Tunnel The Alpine- Draper tunnel, 15,000 feet long, is of the same type of construction as the Olmsted tunnel and penetrates the " Point of the Mountain" between Alpine and Draper. This tunnel, also being constructed by the Thompson Company, was begun December 22, 1938 and was holed through 107. Looking through a section of the Salt Lake Aqueduct pipe are, left to right, Dow H. Young, Assistant Superintendent of the Salt Lake City Department of Water Works and Water Supply: D. A. Affleck, City Purchasing Agent, and L. R. Dunk- ley, Resident Engineer of the Bureau of Reclamation in charge of the aqueduct construction. |