2011-06-29_PERMIT FILE - C1981019A ‎(20)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 6/29/2011
• Doc Name: Section 28 Sedimentation Pond
• Section_Exhibit Name: Exhibit 07 Item 20 Part A -ST
• Media Type: D
• Archive: Yes

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SEDCAD 4 for Windows
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Velocity and Manning's n calculations may not apply for this method.
Structure #10 (Null1
Mine tie in to undist middle leg
Structure #9 (Nonerodible Channel)
Middle leg undisturbed
Triangular Nonerodible Channel Inputs:
Material: Bare rock
Left Right
w/o Freeboard w/ Freeboard
Hydraulic Radius:
0.037 ft
Froude Number *:
Depth (ft) % of Depth (VxD)
Manning's n *:
1.64 ft
Dmin:
2.00 in
D50:
6.00 in
Dmax:
7.50 in
Velocity and Manning's n calculations may not apply for this method.
Structure #10 (Null1
Mine tie in to undist middle leg
Structure #9 (Nonerodible Channel)
Middle leg undisturbed
Triangular Nonerodible Channel Inputs:
Material: Bare rock
Left Right
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope ( %) Manning's n
Mult. x
Ratio Ratio
Depth (ft) % of Depth (VxD)
1.0:1 1.0:1 25.0 0.0350
1.64 ft
Nonerodible Channel Results:
Structure #8 (Riprap Channel)
Trib D, reclaimed 3 yr
Trapezoidal Riprap Channel Inputs:
Material: Riprap
21
Filename: Sec 28 1024.sc4 Printed 12 -08 -2010
Exh. 7- 20A -25 Revision Date: 12/31/10
Revision No.: TR -81
w/o Freeboard w/ Freeboard
Design Discharge:
6.30 cfs
Depth:
0.82 ft
Top Width:
1.64 ft
Velocity:
9.33 fps
X- Section Area:
0.67 sq ft
Hydraulic Radius:
0.290 ft
Froude Number:
2.57
Structure #8 (Riprap Channel)
Trib D, reclaimed 3 yr
Trapezoidal Riprap Channel Inputs:
Material: Riprap
21
Filename: Sec 28 1024.sc4 Printed 12 -08 -2010
Exh. 7- 20A -25 Revision Date: 12/31/10
Revision No.: TR -81