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• TABLE 2.05.3(3)-4 <br />DIVERSION DITCH DESIGN PARAMETERS <br />(ALONG EAST PERMIT BOUNDARY, BORDERING GOFORTH AND MOORE PROP ERTY) <br />DD-109: Area that would have drained into C-109= 8.4 Acres DD-109 <br />CN= 78 Ditch: Trapezoidal channel, 2: 1 side slopes <br />10 Yr - 24 Hr event = 2.0 In Bed Slope = 20/900 = 0.022 <br />Elevation Difference = 40 Ft Peak Discharge = 2.62 CFS <br />Length of water shed = 1,116 Ft Typical bottom width = 3.0 Ft <br />Peak Discharge = 2.62 CFS` Cross sectional area = 1.06 Sq Ft <br />Discharge Volume = 0.34 Ac Fl' Depth = 0.30 Ft <br />DD-108: Area that would have drained into C-108= 58.8 Acres DD-708 <br />CN= 78 Ditch: Trapezoidal channel, 2:1 side slopes <br />10 Yr - 24 Hr event = 2.0 In Bed Slope = 10/1,200 = 0.0083 <br />Elevation Difference = 140 Ft Peak Discharge = 18.66 CFS <br />Length of water shed = 2,257 Ft Typical bottom width = 3.0 Ft <br />Constant flow from Colorado Cooperative Ditch Cross sectional area = 5.91 Sq Ft <br />Company (during summer months) = 0.73 CFS Depth = 1.12 ft <br />Peak Discharge = 2.62 + 13.42 = 16.04 CFS' <br />Discharge Volume = 0.34 + 3.59 = 3.93 Ac Ft' <br />DD-107: Area that would have drained into C-107= 52.0 Acres DD-107 <br />CN= 78 Ditch: Trapezoidal channel, 2:1 side slopes <br />10 Yr - 24 Hr event = 2.0 In Bed Slope = 15/1,000 = 0.015 <br />Elevation Difference = 140 Ft Peak Discharge = 12.33 CFS <br />Length of water shed = 2,602 F[ Typical bottom width = 3.0 Ft <br />Peak Discharge = 12.33 CFS` Cross sectional area = 3.54 Sq Ft <br />Discharge Volume = 2.07 Ac Ft' Depth = 0.78 Ft <br />DD-106: Area that would have drained into C-106= 4.60 Acres DD-106 <br />CN= 78 Ditch: Trapezoidal channel, 2:1 side slopes <br />10 Yr - 24 Hr event = 2.0 In Bed Slope = 30/1,000 = 0.03 <br />Elevation Difference = 30 Ft Peak Discharge = 33.32 CFS <br />• <br />Length of water shed = 1,000 Ft Typical bottom width = 3.0 Ft <br />Peak Discharge = 2.62+16.04+12.33+2.33= sa.s2 cFS• Cross sectional area = 5.64 Sq Ft <br />Discharge Volume = 0.34+3.93+2.07+0.19= s.ss a~ F~• Depth = 1.09 Ft <br />All diversion ditches will be constructed with Beater cross sectional area than what is listed for each ditch above. <br />Culvert C-107 will handle the water from diversion ditches DD-109", DD-108", and DD-107". The combined 10 Yr - 24 Hr Peak <br />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 <br />inches. ' -Results are from the program "Storm", Version 6.21 ' -See Map 2.05.3-1 for diversion ditch location s. <br />(REVISED 5101) <br />• Attachment 2.05.3(3)-1- 2 <br />