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<br />, - <br /> <br />-'c ~frilcful'es;c{)ritintied <br />.re~continuously retulJled to the river, through the :. <br />CalifotniaSluicewayChannet <br />" The Gila Canal Headgates are located, , <br />adjacent to the Arizona abutment oithe dam. Qne <br />desiltirig basin re.moves the sand from the water ' <br />,before it enters the Gila Gravity Main Canal, which <br />Serves the Yuma area~ The sediment removed is <br />returned to the river when necessary by opening- <br />~e sluiceway gates located on the bottom (lnd <br />dOwIlstream end of the basin. The basin will <br />, , handle ;1: flowof2,200 c.f.s. <br /> <br />Operation <br /> <br />The Impericll Dam, Gila Headwodcs, All- <br />American Canal Works and the All-AmeriCan <br />Canal are operated and maintained by the lID, <br />with costs shared by the Bureau of Reclamation, <br />Coaclwlla, V alley Water District, Yuma County <br />Water Users~d other water users. <br /> <br />Dimensions: <br /> <br />Overall length .. .......................... ................. ......... ......... ..... ....... .......... 3,485 feet <br /> <br />(Including a 490-foot dike at the Arizona end) <br /> <br /> <br />Overflow Weir Section: <br /> <br />Length ................ ......... ........ ........... ... ........... ............... ... ... ...... ...... ..... ... 1,197 feet <br /> <br />Height ........................................... 31 feet (from base to crest at 181 feet elevation) <br /> <br />Operating Bridges over Non-Overflow Section: <br /> <br />EI evati on ............ ...... .............. ............................ ......... .... ...... ......... ...... .... 197 feet <br /> <br />Freeboard above crest of maximum calculated flood ........................ 6 feet <br />Maximum calculated flood over weir ................................................. 10 feet <br /> <br />Maximum Diversion Capacities: <br />All-American Canal :.................. .............. .................. ......... ............. 15,155 c.f.s. <br /> <br />Gila Canal.... ......... ............... ........ ........ ..................... ........ .... .............. 2,200 c.f.s. <br /> <br />Type Construction: <br />Reinforced concrete slab and buttress type <br /> <br />Desilting: <br />Three desilting basins <br /> <br />Length ...................................................................................................... 770 feet <br /> <br />Wi d th ............................................ ............................................................ 540 feet <br /> <br />72 scrapers ..... ..... ............... ...... ................ ......... ......... ...... ....... 125-feet diameter <br /> <br />Flow capacity ..... ............... ..... ...... .......... ............ ......... ................ ........ 4,000 c.f.s. <br /> <br />Silt ca paci ty .. ...... ............ ........... .............. ..................... ............. 70,000 tonsl day <br /> <br />Costs: <br />Imperial Dam .................................................................... $3,000,000 (approx.) <br />(Includes Arizona and California abutments, California sluiceway and overflow weir.) <br />All-American Canal Headworks .................................................... $1,300,000 <br />All-American Canal Desilting Basins ........................................... $4,000,000 <br />Gila Headworks and Desilting Basin ............................................ $2,000,000 <br />Total cost of works .............................................................. $10 to $11,000,000 <br /> <br />'@ 110 uses recycled paper <br /> <br />PIOI1994 <br />