_PERMIT FILE - C1980007A

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Name: MISCELLANEOUS DRAINAGE
• Section_Exhibit Name: Exhibit 66 Miscellaneous Drainage
• Media Type: D
• Archive: Yes

MR-418 Calculations
Structure Name C5E-25
SEDCAD Structure# 67
Size(in) 12
Material HDPE
Length(ft.) 320
Slope(%) 35
Manning's n 0.0130
Design Discharge(cfs) 2.75
Summary of Results
Design Discharge Combined Maximum
Structure Structure# Design Discharge Discharge of
C5E-25 Discharge Structure
D5E-6 13 3.96 2.75 6.71 22.18
C5E-7 Stand Alone#1 13.7 2.75 16.45 28.38
D5E-4 6 15.95 2.75 18.7 38.82
C5E-6 Stand Alone#1 15.95 2.75 18.7 24.45
D5E-3 #4 20.34 2.75 23.09 44.88
D5E-2 #3 26.49 2.75 29.24 49.29
C5E-4 Stand Alone 91 21.35 2.75 24.1 24.45
C5E-3 #17 21.6 2.75 24.35 31.56
C5E-2 Stand Alone#1 21.6 2.75 24.35 24.45
Manning's Equation for Gravity Flow
1.49 * a * i
Q = n R
Structure: D5E-6-#13
w/Freeboard
(ft.)
Manning's Coefficient(n) 0.017
Top Width(T) 4.12
Bottom Width(b) 0.00
Depth(h) 1.03
z(ft.) 2.00
Area(ft) 2.12
Wetted Perimeter(ft.) 4.61
Hydraulic Radius-R(ft.) 0.46
Slope-S(ft./ft.) 0.04
Maximum Flow-Q(cfs) 22.18
Design Discharge(cfs) 3.96
Combined Flow 6.71
(D5E-6 Design Flow+C5E-25 Design Flow)
Maximum Flow>Combined Flow? Yes
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