2015-09-09_PERMIT FILE - C1981019A ‎(17)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/9/2015
• Doc Name: Section 28 Sedimentation Pond
• Section_Exhibit Name: Exhibit 07 Item 20 Part A -ST
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Structure Detail:
Structure #39 (Erodible Channel)
Upper NW wsheds drop channel into Sec 28 Coll Ditch
Trapezoidal Erodible Channel Inputs:
Material: Shales and hardpans
Bottom Left Right
Freeboard Freeboard Freeboard
Limiting
Width (ft) Sideslope Sideslope Slope (%) Manning's n
Depth ft
p () % of Depth Mult. x (VxD)
Velocity
Ratio Ratio
11.11 ft
(fps)
10.00 3.0:1 3.0:1 20.0 0.0250
X -Section Area:
6.0
Erodible Channel Results:
Structure #38 (Riprap Channel)
Sec 28 Collection Ditch
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
w/o Freeboard w/ Freeboard
Design Discharge:
16.27 cfs
Depth:
0.18 ft
Top Width:
11.11 ft
Velocity:
8.33 fps
X -Section Area:
1.95 sq ft
Hydraulic Radius:
0.175 ft
Froude Number:
3.50
Structure #38 (Riprap Channel)
Sec 28 Collection Ditch
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width (ft) Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
12.00 2.0:1 2.0:1 16.0
0.14 ft
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
5
Filename TR -105 Sec28Pond 10024NS sc4 Printed 02-04-2015
Exh. 7-20A-12 Revision Date: 02/15/2015
Revision No.: TR -105
w/o Freeboard w/ Freeboard
Design Discharge:
17.89 cfs
Depth:
0.14 ft
Top Width:
12.54 ft
Velocity*:
X -Section Area:
1.66 sq ft
Hydraulic Radius:
0.132 ft
5
Filename TR -105 Sec28Pond 10024NS sc4 Printed 02-04-2015
Exh. 7-20A-12 Revision Date: 02/15/2015
Revision No.: TR -105