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<br />~~~~, <br />>il~ <br /> <br />1: <br /> <br />I 1- <br /> <br />, <br /> <br />n~ . <br /> <br />" <br />l' <br />'. <br /> <br />" <br /> <br />l <br /> <br />I; <br /> <br />i <br />./ <br /> <br />- -- --~-- ~-" ',', ,,'~ --~--. ~"'<~ '-;i-"";'", ....'- _."~2:;; __~.;';i:~\.,' <br /> <br />tf" <br />co <br />C\l <br />CJ <br /> <br />TENTATIVE PLAN FOR SUMP DRAIN <br /> <br />c..:') <br /> <br />The Comoittee has with confidence relied for its data on <br /> <br />c~.~ <br /> <br />thc proper locD.tion and the physical characteristics of the Sump Dro.in <br /> <br />on tho "Report on Feasi bili ty of Drc,ining the Sump Aroa of the Sc.n <br /> <br />Luis Valley, Colorado," by Watrous and Tipton, March 1929. This re- <br /> <br />port vms prepared for the state and together with other data subse- <br /> <br />qU011tly secured for the state was made avai lable to this comrni ttee. <br /> <br />The upper section of tho trough of the Closed Basin from <br /> <br />the junction of Saguache and S= Luis Creek to Head Lake, for a dis- <br /> <br />tnnce of 17 miles, passes through a series of me "dows [\lid playas, with <br /> <br />crooked creek channels of negligible capacity occurring in the upper <br /> <br />portions. Landowners through these regions will doubtless oppose any <br /> <br />plan of deep drainage that does not take aocount of their specific <br /> <br />needs and practices. For maximum production the demand is for flood- <br /> <br />ing in early slnmner, succeeding by a lowered water t~ble to permit <br /> <br />harvesting. This would ne cessi tate the constructi on of checks in 0. <br /> <br />drain to facilitate flOOding. The result of this would be more likely <br /> <br />to feed into these areus waters secured i'rom the eastern streums than <br /> <br />to augment the outi'low b3' the drainage oi' these lar~ds. The on13' <br /> <br />waters thut can be secured in this locality are i'lood waters not desir- <br /> <br />ed in irrigation of the meadows. It is, therefore, proposed to con- <br /> <br />struct through upper section oi' the trough a storm water channel and <br /> <br />to secure capacity with a minimum depth, and at a minimum cost. This <br /> <br />channel, therefore, has been ass1l11led to be constructed with an average <br /> <br />cutting depth of only 5 i'eet and a bottom width of 30 i'eet. The <br /> <br />gradient will be only 0.8 i'oot per mile, o,nd its capacity will be as <br /> <br />i'ollows: <br /> <br />12 <br /> <br /> <br /> <br /> <br />