2016-08-08_PERMIT FILE - C1981019A ‎(116)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 8/8/2016
• Doc Name: Small Area Exeptions
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part G
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
Structure Detail:
Structure #3 LErodible Channel)
dwnstrm edge of disturbed area
Trapezoidal Erodible Channel Inputs:
Material: Shales and hardpans
Bottom Left Right
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%) Manning's n
Width (ft)
Mult. x
Velocity
Ratio Ratio
Depth (ft) % of Depth (VxD)
(fps)
20.00 4.0:1 4.0:1 1.0 0.0250
X -Section Area:
6.0
Erodible Channel Results:
Structure #2 (Grass Filter)
nat7 veg area dnstrm of disturbance
Grass Filter Inputs:
Stiffness
w/o Freeboard w/ Freeboard
Design Discharge:
5.58 cfs
Depth:
0.16 ft
Top Width:
21.27 ft
Velocity:
1.71 fps
X -Section Area:
3.27 sq ft
Hydraulic Radius:
0.153 ft
Froude Number:
0.77
Structure #2 (Grass Filter)
nat7 veg area dnstrm of disturbance
Grass Filter Inputs:
Stiffness
0.0611 ac -ft
Roughness Grass Height Hydraulic Infiltration Factor
Filter Length Filter Width Filter Slope
Coefficient (in) Spacing (in) Rate (iph)
(ft) (ft) (%)
(N -sq m)
1.0367 fps
0.0010 3.0 3.00 0.20 20.000
20.0 600.0 15.0
Grass Filter Results:
Total Infiltration Volume:
0.0611 ac -ft
Filter Infiltration Rate:
0.0556 cfs
Peak Flow Depth:
0.016 in
Critical Prone Velocity:
1.0367 fps
Wedge Location:
0.61 ft
Sediment Depth in Zone D:
0.1955 in
Trap Efficiency:
69.1%
W
Filename PR04 SAE1 w consery inputs sc4 Printed 07-22-2015
Exh. 7-23G-9 Revision Date: 07/31/2015
Revision No.: PR -04