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<br />The Grassy Creek valley floor from the outcrops of Twentymile <br />Sandstone downstream to Routt County road #27 appears to be <br />the only portion deserving a detailed study for possible Allu- <br />vial Valley Floor designation. <br />Positive Flood Irrigation Criteria <br />a. Adequate headwaters and water is stored. (Water rights in <br />Grassy belong to another landowner). <br />b. Could be spray irrigated if adequate surface or ground <br />water were available. <br />c. Probably 20 acres could be irrigated. <br />Negative Flood Irrigation Criteria <br /> a. No ditches. <br /> b. No diversion points. <br /> c. No record of filing of water rights. <br /> d. No vegetative changes. <br /> e. No wells or pumps. <br /> f. No diversion from other drainages. <br /> <br />' <br />~)"~ g• <br />~ o known irrigation is practiced in similar valleys <br />(size <br />sha <br />e <br />lo <br />a <br />d str <br />am <br />nt <br />t) withi <br />h <br />z <br />~ a , <br />p <br />, s <br />pe <br />n <br />e <br />e <br />renc <br />men <br />n <br />~'i`~ _ a 2 mile radius. <br />. ~/-/~ h. Depth from stream channel and arroyos would create <br /> > <br /> erosion problems from any type of irrigation. <br />~, <br />yy(ti ' i. Size of potentially irrigable plots (9-5 acre areas) <br />are small for the investment. Economically unsound. <br />Subirrigated Lands on Grassy Creek <br />Subirrigated bottom land is shown on the map. It is restricted <br />to a narrow belt of a few feet on either side of the active <br />stream throughout the specific study area. An area west and <br />immediately adjacent to Routt County road #27 contains about 2 <br />acres of subirrigated land. These areas all contain grass <br />suites typical of this environment in Routt County. <br />