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<br />193,l <br /> <br />c'Existinz sediment"tion problem) <br /> <br />1-- <br /> <br />Table-6.--Annual-average-sedtmenta. <br />tion of existing reBervoirs <br /> <br />. <br /> <br />ISediment 1% of 1945 <br />Reservoir : ~ ac.-ft~J irrigation <br />~_I"'~pAl":..ty <br />Lake Henry. . .. . ..: 75 : 1.2 <br />Lake Meredith. .. ..: 486 (}) 1.3 <br />Dve . . . . .. .. .. : -=;6 1.7 <br />Holb.'ook. . . .. .... I 58 1.3 <br />Horse Creek . . . . . . . .: W 160 0.7 <br />Adobe Creek. . . . . . . .: JJ./ 6'H 1.0 <br />Thurston. .". . . . . . . .: g 0.4 <br />Great Plains. . . . .: ~I 734: 0.4 <br />Jnhn MArtin. . . . .: i/4.177 1.1 <br />T tal sediment t on .. : 6 1 1.0 <br />~I Estimated as 1. of present CAPACity. <br />Q/ Portion of sediment from Arkensae River <br />estima..ted-by-Soil~Coneervation~Se~ice,- --:-'- <br />'-~S1-=Port~on-of--sediment=coming~from;Arkansas= <br />!liver_es Hnn ted=as-30'Jf/2=of.-tot'lil=:sediffientan:o.n., <br />~~c~.:;... =..-:'. - _-= -=-,gj=Estiinat ed"oy.cus1ng=rat1io:=of=c.iVerliFcin.s u = <br />" '.c.- ~".cc.to~tii:ose-:':of;'Rtiisli:Creelt-and:'=Jo:dObe::.Creek:Relii'. ,,~ <br />- -, ,:-. -:"~ _::-:::--':::~': ');Bnrn'~t"ea.:::i~'o'~~f1gUre3uriifshecfbYCofpS <br />of Engil1eer's. <br /> <br />.-------.- <br /> <br />---- <br />, , <br /> <br />'- <br /> <br />!~--. <br />--, <br /> <br />-- <br />-=.":. ~ <br /> <br />Arkansae River channel ap-zradation <br /> <br />SurvelJl,show tha,t ssdimentation in the Arkansas River channel is <br />occurring at an average rate of 0.2 feet annually or approJdmately 245 <br />acre-feet per year. <br /> <br />Total sedimentAtion pbove John Mart~n Reservoir <br /> <br />Summarizing the total sedimentation on the Eastern Slope between <br />the potential Pueblo Reservoir above Pueblo and the John Martin Dam, an <br />averp~e of 8,435 acre-feet of sediment ie deposited annually on irri- <br />gated Ipnd and in laterals, canals, and reservoirs other than John <br />Martin. Approximately 59 percent of this sediment ie deposited dir- <br />ectly on irrigated land; about 26 percent is retained by reservoirs: and <br />the remainder is deposited in laterals, cMals, and the stream channel. <br /> <br />." ------ <br />- .~--- <br /> <br />10 <br />