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<br />-. <br /> <br />1932 <br /> <br />(Existine sediment~tion nroblem) <br /> <br />tne-i'rri-ge. ti-on-wa ter;-Hen'ce-300,OOCnU vtcted-by-6o-results-1n:;,OOO <br />acre-feet average ennual seniment deposition on irrigated land. <br /> <br />Laterals <br /> <br />For every 160 acres of irrigated land there is approximately 1 <br />mile of laterals. The approximate total length of later~ls is there- <br />fore 300,000 divided by 160 or 1,875 miles. These laterals must be <br />cleanen once or twice a year to keep them operating. It has been <br />found that on an average the laterals fill up one-third each year <br />end that the average cross-section of sediment in laterals is 4.66 <br />feet wine by .44 feet deep. Hence, the quantity of sediment depos- <br />ited in the lateral system of the irrigated land on the Eastern <br />Slope is approximately 4.66 x 0.44 x ~OO.OOO x ~.2g0 equals 466 <br />160 x 43,560 <br />c ,acre=f.se,t=.f\.v.~:r.age"~ll,,alcly.., _,' -, '-~-:_~ - -- -. <br />- - - - ~----- - ---- -- -- <br /> <br />---- - ----- <br />-- --------._--- <br /> <br />~~::_-_'~'':'''C___, :: ~:.,-~-:_-~~-:,~~;-_.,c.:___ _c~:::;_~--=--_=_CMArS'-,::~-'-- ~'.2..:._' ~---'-- <br /> <br />.----- - - - ------. <br />, , <br /> <br />. <br /> <br />From studies made by the Fort Lyon CpnR1 Company supported by <br />data accumule,ted from the Soil Conservation Service ann the Bureau of <br />Reclamation, it is found that sediment ie depositen in the irrigation <br />canals, shown on exhibit 3, at an average rate of 0.01 cubic feet per <br />mile per second-foot. From table 4 of existing canals, length times <br />canal capacity equals 421,073 second-foot miles. Hence, 42l.07~ x ~2.g <br />43,560 <br />equals 510 acre-feet average annual sedimentation of the canal system. <br /> <br />Existing can.us <br /> <br />;Source of water <br />. <br />. .: Arkansas River <br />. II <br />.. <br />. n <br />-. <br />II <br />d <br />II <br /> <br />290 <br />59 <br />60 <br />gOG <br />15 <br />~OO <br />140 <br />100 <br />6~0 <br />00 <br />140 <br /> <br />Bessemer . . . . . . <br />Booth-Orchard Grove. <br />Excelsior. . . . . . <br />Colorado. . . . . . . _. <br />Collier. . . . . . . <br />Rockv Ford Hiehline. . <br />Oxford Fp,rmers . <br />Otero. . . .. . <br />Catlin . . . . <br />Holbrook . . . . <br />Rocky Ford . . . . <br />Ft. ~on Storage . . <br /> <br />. . <br /> <br />.. <br /> <br />II <br />II <br />II <br />II <br />II W <br />ArkMsas R.' & <br />Ado111i C eek <br />ArkMsas i ver--: <br />Ft. Lyon Canal <br />Arlfanse.s Ri1fer <br /> <br />g <br /> <br />. <br /> <br />. . <br /> <br />. <br /> <br /> <br />1--./-- -- - .-,-- <br /> <br />ort--Lyon. . . .-. . . .: <br />Kicking Bird. . . . . .: <br />Las Animas Consolidated.: <br />8 An m 9 T n. . ~. <br /> <br />