a Each sheet pile shall be formed of three planks of uniform width, thickness, and length, with true tongue and groove, and substantially fastened and well driven in the cases of driving. b Steel, 12 feet long. c Delivered and driven. d Northern Pacific Railroad. • Great Northern Railroad. 1 Per 1,000 feet B. M., ready to drive. Square yard.. 1,200 .50 .75 2.00 12, 160 1.00 1.33 1.33 Cubic yard 1,000 1.00 1.50 1.00 do. 3,500 1.25 1.25 ARIZONA. SALT RIVER PROJECT. GENERAL STATEMENT. The principal data relating to the Salt River project are summarized below: Summary of principal data relating to Salt River project. Counties: Maricopa, Gila. Latitude: 33° 30′. Longitude: 112°. Townships: 7 north to 2 south, ranges 2 west to 14 east. Average rainfall: On drainage basin, 10 to 20 inches; on irrigable area, 3 to 10 inches. Estimated annual discharge of Salt River at dam site: 663,000 acre-feet. Range of temperature: Maximum, 120°; minimum, 20°; mean, 70°. Average elevation of irrigated lands: 1,000 to 1,300 feet. Principal products: Semitropical fruits,, cereals, alfalfa. Principal railroads: Gila Valley, Globe and Northern; Santa Fe, Prescott and Phoenix; Maricopa and Phoenix. Nearest station: Globe, 43 miles from dam; Phoenix, 78 miles from dam, in center of irrigable district. Principal markets: Phoenix, Pacific coast cities, and eastern fruit markets. Irrigable area: 272,000 acres. Watershed area: 6,260 square miles above the mouth of Verde River. Reservoir area: 25.5 square miles. Capacity of reservoir: 1,284,000 acre-feet at elevation 220 feet above low water. Height of dam: 270 feet. Length of dam: 235 feet at river, 1,080 feet at top, including spillways. Type of dam: Masonry arch; gravity section from foundation." Power developed: 4,400 horsepower (at dam site); penstock tunnel, 620 feet. Ownership of lands: Private. Character of soil: Sandy loam, with clay in places. Value of irrigated land: $50 to $500 per acre, depending upon location. This project contemplates the irrigation of about 200,000 acres of fertile land in the Salt River Valley near Phoenix. This land lies on both sides of the river and slopes gently to the southwest. There is a large district near Mesa and Tempe where the underground water is so near the surface as to be readily reached by pumping, and the installation of enough pumping plants to irrigate from 25,000 to 40,000 acres of land in addition to the area served by the reservoir will soon be under way. When finally completed the irrigation works will consist of the Roosevelt dam, impounding 1,300,000 acre-feet of water; a large diversion dam at Granite Reef, about 30 miles above Phoenix, to divert the combined waters of the Salt and Verde rivers into the canal systems of the valley; pumping plants, for which power will be generated at the Roosevelt dam and at various points along the canals and Salt River; and a complete system of main and distributing canals and laterals. Part of these works are already finished and in operation. |