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• • <br />Table 4 -Summary of Diversion Ditches <br /> <br />Ditch # <br />Description Service <br />Statue. Drainage Design <br />Design Basle <br /> period Area Dlschar a <br /> Prevents runoff from small area from entering the Standard Diversion Ditch cross <br />1 plant from the west. Runoff remains within Arroyo "E" 1 throuh 50 Temporary 28 75 section. <br /> (L = 2400 ft) <br /> Diverts runoff from Arroyo "E" and portionof Arroyo "F" <br /> above the Plant into Arroyo "G". When mining begins <br />475 <br />580 Bw = 10 ft, ss = 4; 1, Dn = 3 ft, <br />2 in year 6, area reduced to 75 acres with a peak 1 throuh 50 Temporary <br />(75) <br />(180) V = 10 fps, Turf <br /> discharge of 180 cfs. Cross section based on Reinforcement Mat required. <br /> "Reconstructed Arroyo" (L = 3500 ft) <br />3 Captures runoff from fill area and directs to Arroyo "F„ 1 throuh 50 Temporary 61 120 Standard Diversion Ditch cross <br /> SedimenUDetention Pond. (L = 1700 ft) section <br /> Diverts runoff from into Arroyo "I" Pond to maximize <br /> runoff controlled by pond that will discharge into the Standard Diversion Ditch cross <br />4 restored highwall. The Pond and Diversion ditch are 50 -on Permanent 37 100 section <br /> optional, depending on final reclamation surface. <br /> (L = 700 ft) <br />NOTES: 1. All diversion ditches sized for 100-year peak flow <br />6/17r100T, RepatTblsFigure3.~ds <br />