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<br />. <br /> <br />. <br /> <br />the South Platte River. Flows at the Kersey gage were considered <br /> <br />as being at the Weld County site in this study. The amount of <br /> <br />Denver's sewage outflow was obtained from the City of Denver, <br /> <br />tabulated and added to the South Platte River gaged flow at Denver. <br /> <br />Sectional accretions between the Denver and Henderson <br /> <br />gages were assumed available for diversion in the reach. Sectional <br /> <br />accretions between the Henderson and Ft. Lupton gages were assumed <br /> <br />available below the Brighton Ditch. On the basis of seepage inves- <br /> <br />tigations made in 1926, 1927 and 1929, between the Ft. Lupton and <br /> <br />Kersey gages, it was estimated that approximately 25 percent of the <br /> <br />total accretions between those gages became available for diversion <br /> <br />below the Evans No. 2 Ditch. and of the remainder, one-half was <br /> <br /> <br />available for diversion below the mouth of st. Vrain Creek and the <br /> <br /> <br />other half below the mouth of the Big Thompson River. In the opera- <br /> <br /> <br />tion studies, at such times as the computed accretions available <br /> <br />below the Evans No. 2 Ditch plus the South Platte River flows were <br /> <br />not great enough to equal the actual diversions between this ditch <br /> <br />and st. Vrain Creek, the accretions available below the Evans No. <br /> <br />2 were increased enough to make the total water in the river equal <br />to the irrigation diversions. <br /> <br />The total daily flows at Denver were routed downstream by <br /> <br />deducting 4iversions and adding tributary inflow and accretions at <br /> <br />their respective points of availability. Tabulations were made <br /> <br />of the Denver water at the Henderson gage, the Ft. Lupton gage, <br /> <br />- 7 - <br />