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• TABLE 2.05.3(3)-4 DIVERSION DITCH DESIGN PARAMETERS (ALONG EAST PERMIT BOUNDARY, BORDERING GOFORTH AND MOORE PROPERTY) DD-109: Area that would have drained into C-109= 8.4 Acres CN= 10 Yr - 24 Hr event = Elevation Difference = Length of water shed = Peak Discharge = Discharge Volume = 7e 2.0 In 40 FI 1,116 FI 2.62 CFS' 0.34 Ac Ft' DD-108: Area that would have drained into C-108= 58.8 Acres CN= 78 70 Yr - 24 Hr event = 2.0 In Elevation Difference = 140 Ft Length of water shed = 2,257 Ft Constant Flow from Colorado Cooperative Ditch Company (during summer months) = 0.73 CFS Peak Discharge = 2.62 + 13.42 = 16.04 CFS` Discharge Volume = 0.34 + 3.59 = 3.93 Ac Ft' DD-107: Area that would have drained into C-707= 52.0 Acres CN= 78 . 10 Yr - 24 Hr event = Elevation Difference = 2.0 In 140 Ft Length of water shed = 2,602 Ft Peak Discharge = 12.33 CFS' Discharge Volume = 2.07 Ac Ft' r L_ DD-106: Area that would have drained into C-706= 4.60 Acres CN= 78 10 Yr - 24 Hr event = 2.0 In Elevation Difference = 30 Ft Length of water shed = 1,000 Ft Peak Discharge = 2.62+16.04+12.33+2.33= aa.az cFS~ Discharge Volume = 0.34+3.93+2.07+0.19= ssanccr DD-109 Ditch: Trapezoidal channel, 2:1 side slopes Bed Slope = 20/900 = 0.022 Peak Discharge = 2.62 CFS Typical bottom width = 3.0 Ft Cross sectional area = 1.06 Sq Fl Depth = 0.30 Ft DD-108 Ditch: Trapez Bed Slope = 10/1,200 = Peak Discharge = Typical bottom width = Cross sectional area = Depth = Tidal channel, 2:1 side slopes 0.0083 18.66 CFS 3.0 Ft 5.91 Sq Ft 1.12 ft DD-107 Ditch: Trapezoidal cha nnel, 2:1 side slopes Bed Slope = 1511,000 = 0.015 Peak Discharge = 12.33 CFS Typical bottom width = 3.0 Ft Cross sectional area = 3.54 Sq Ft Depth = 0.78 Ft DD-106 Ditch: 7rape Bed Slope = 30/7,000 Peak Discharge = Typical bottom width = Cross sectional area = Depth = toidal channel, 2:1 sido slopes 0.03 33,32 CFS 3.0 FI 5.64 Sq Ft 1.09 FI All diversion ditches will be constructed w8h Beater cross sectional area than what is listed for each ditch above. Culvert C-107 will handle the water from diversion ditches DD-109", DD-108", and DD-107". The combined 10 Yr - 24 Hr Peak Discharge from these three ditches is 30.99 CFS. The correct size of corrugated metal pipe (figure C-107, page 2.05.3(3)-24) is 36 inches. ' • Results are from the program "Storm", Version 6.21 ' -See Map 2.05.3-1 for diversion ditch locations. (REVISED 12100) 2.05.3(3) - 24