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<br /> <br />,Systei,ri <br /> <br /> <br />',<, "~"'tl-rrough ~gr,~vity~fl()w c'Y1~ljColol'~d()Riv~r water is'conveyed to th~ h~d:' <br />_ 9ftlleDistrict system ~t Drop No; 1. Several main canals branch off the All-American;',,' <br />theJ!~stlIighIine, Central Main and WestSide'Main canals. Service to Itnperial Valley is '. <br />largely provided from these three main canals or from the tributary lateral canals tital ' '- <br />Jheysupply. '. ',' '. ' , :, ' .. ' , ' <br />, ." . ,Itl total, 1,675mil~s of irrigation canals are within the District. Seven regulating, <br />,~.r,g~R~ witil t9tal storag~capadty ()fmoretllan. ?,5OQ a~e-feet are includ~d witl.1it1, " <br />~edi$tribution system. ' <br /> <br />AU-American Canal Specifications <br /> <br /> <br />Overall length...................................... ....................... ..................................................... 82 mil es <br /> <br />Wid th ........ ................... ...............'.................... .........................................................150 to 200 feet <br /> <br />Depth.... ....... ......... ........ ......... ................ .............. ...... ..................... ...... ........... ........ ...... 7 to 20 feet <br /> <br />Total Drop ................................................................... ........................................... ........... 175 feet <br /> <br />Capacity: <br />From Imperial Dam to Siphon Drop Power Plant ....................................15,155 c.f.s. <br />From Siphon Drop Power Plant to Pilot Knob .......................................... 13,155 c.f.s. <br />From Pilot Knob to Drop No.1..................................................................... 10,155 c.f.s. <br />Diversion points: <br />Yuma Project: Diverts 2,000 c.f.s. through Siphon Drop Power Plant and other <br />turnouts on the canal upstream from Siphon Drop. <br />Coachella Main Canal: Diverts 2,500 c.f.s. at Drop No.1, 20 miles west of Yuma. <br /> <br />Cost ........... .................................................................................................................... $25,020,000 <br /> <br />Financing: <br />The All-American Canal was built by the Federal Bureau of Reclamation. The <br />lID made semi-annual payments as part of a 40-year contract ending in 1994, to <br />the U.S. Government to repay the construction loan on the All-American Canal. <br />Construction/soil................................................... Unlined in mostly shifting silt and sand <br /> <br />Structures- <br /> <br />The All-American Canal trashrack and headgates are located aq.jacent to the, <br />,e:alifornia abutrnentof Imperial Dam. Three'desilting basins (design capacity 4,000 c.f.s. ' <br />'~~ch) ,remove the sand from the river water before it passes to the All-American Canal. <br /> <br />Ffydroelectric Power <br /> <br />The passage of the aoulder Canyon Project Act also served as a springboard for <br />hydroelectric powerfu the- Valley. Part of the Act required the Secretary of the Interior <br />to obtain local guarantees of re,payment for the, construction costs of the All-American" <br />Canal, ariiong other projects. The no recognized that the people of the Valley could " <br />repay their share of the construction loans if they were given the right to utilize the: <br />power possibilities on the Canal. <br />The first hycfroelectric plants on the All-American Canal were completed at, <br />Drops 3 and 4 in 1941. A hydro power facility at Drop 2 was installed in 1953. The Pilot <br />