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• <br />• <br />• <br />S <br />RS~i'Operational South Diversion <br />Calculation Rational and Results Summary <br />Rational: <br />Calculated using Sedcad+ Ver. 3 <br />Areas, slopes and flow paths digitized from 100 scale topo maps flown in 11/94. The <br />attached 400 scale diagram represents the subwatersheds digitized. <br />The soil map, Exhibit 23, shows the azea as Area 52C "Utaline Stoney Loam. Utaline <br />has a published soil group of "B" in Table B-1 of Peak Flows in Colorado. The <br />following CN was used in the calculations: <br />64 - B soil group, sage-grass with 20% cover. <br />100 year 24 hour storm event of 2.2" used for drainage calculations associated with <br />RSRDA <br />Results Summary: (other information may have been generated in this section but is not being <br />used in the site drainage design at this time.) <br />Structure # Structure Description <br />Design <br />111 Diversion above first culvert <br />112 First culvert <br />113 Diversion between culverts <br />114 Second culvert <br />211 Diversion below second <br /> culvert <br />2.5:1 side slopes, .8% grade, 0.9' min. depth <br />1% grade, 8" required, 18" in place <br />2.5:1 side slopes, 0.3% grade, 1.1' min. depth <br />1% grade, 9" required, I8" in place <br />2.5: I side slopes, 5%grade, 0.9' min. depth <br />R55 - 30 <br />(New 3/1/96) <br />