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['rile, the ditch c reaches of ex fiunnel-6gtto Posed and m has been subse constructed throe h fractured sandstone, quently scoured and erode grows .so heavily n the b er SOi1s' and teatures a sanher down the ditch co d' resulting in significant and cleanrng to ens ankS'des that the ndY channel b arse, the ditc throe ere the irate rat Colorado Co_ °ttom. In h channel is gh the dee g y of fhe °Perative Co most reaches, ve of the West Per soils, the ditch botto ditch Chan mpanY perfo getation Lateral irrio m is periodic nel. Occasionally, wheYetmS routine cutting bacon ditch is a a11Y cleaned o he ditch Flow ' PproximatelY "414 ft/ft. ut (dredged). The °ver courses Comp~~h Th est Lateral irrigation all gradient mid- ditch is 'qu ditch is exclusive) c October, dePendina med on" Y ontrolled Year, the d" bon the Teti th ofally i^ mid-April, and c by the Colorado Co~ Itch is tempOr~.il ontinues to 0 delive g each ear' red via Y turned Y s growin Perate operative this lateral and t °n tO Provide g Season Du " uP~ntil about irrigation, dnnkin w he rest of the Water for fiilin Ong the remain regime in g ater and livestock Burr°undi g cisterns and er of each the vicinu use, and is the do ditch System stock ponds Water Y of the New Horizon PrOVides a w Most reaches Mine, m'nantseasonalinflue stet race of the h Dome for along the Wesi hater Ydrologic course, seepage. The reaches t al Lose irri through diversions hat showe gation flow getated ve bank sides n the day the study Wass in flow had w~errbeino' evapotranspiration , of probably occurrin Seepage of irrigation perf°rnred, as well as si withdrawn along each d ated at h'g rates tivater excav throe her and occurs aloe $nificant Ien~ths reach gh the shallow volumes a]Opo g the entire reach of the yV of heavily soils into the ° the "ridge-to est Lateral, The tw hrgt~]Y fractured sandst rte reach where the ditch was ° reaches where the segment of the West ditch featured weathered sandstone Lateral, The gams rn flow combination 'and like) ditch channel botto are portions of the soils with 1°ca]1zed irate Y results in relative] min this reach is 1 general "edge-top^ and fractured s nsive „fl Y large amounts argeiY fractured and andstone °Od'ng'tYPe" irrigation of seepage This see The combination of frac eventually flowin travels lateral) "flood- tared, weathered g back into the Y throe page, in t3'Pe"irrigation along these tw Sandstone channel West Lateral slight) gh the shallow Flows in C ° gaining reaches like) bottoms in the Y downstream. alatnity Draw Y resulted in the ditch and localized Ditch's return irri generally reflect 1oc measured gains in flow, ~ 605 nation gadOrnfl ~w is its ~'rngation and snow Pr'marY source, ye Practices. Water fro cfs in April to runoff. ~ 1987 ry little su m the West the non-irtgation i3.4 cfs in July. Flow ,measured flow pple1Yientai is de ~ Lateral flow flow Period, Shallow in Calamit rates in Callatnit trued from into Period's water. This o ground water apuvi Y Draw varied from 1. Y Draw varied from moFondiforrn and r~ unfl how b ow is related focal i es Provide a large4 0 2'Q6 cfs during Sediment gular to 1 Draw 007 for the N Y the Permeabilit nrgati°a r P rtion of this low system, The drains eW Horizon Mine 2 Y of these nea~ acticeS but is consolidated caPaciry and ge system a[ the Ne mining site w surface alluvial de will collect al]torage times to com w Ha Ill contribute w Aosits. ntnoff fro Pletei r~ZOn Z sue has been stet to the (TSS) contribution m the Y control a !0-yeaz 24_ho~ designed to Calamity from 'r"ne site and shoo Precipitatio Provide ade this area aver the life ld actually lower n event. 4uate of the Present total su This system 'tune, Increased TDS lev SPended . els in this solids water from 6