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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12
Velocity and Manning's n calculations may not apply for this method.
Structure #16 LNuI/,�
Mine tie in to undist south leg
Structure #15 LNonerodible Channel
Uppr reach south leg undist
Triangular Nonerodible Channel Inputs:
Material: Bare rock
Left Right
w/o Freeboard w/ Freeboard
Velocity*:
Mult. x
X- Section Area:
1.23 sq ft
Hydraulic Radius:
0.099 ft
Froude Number *:
11.69 fps
Manning's n *:
1.72 sq ft
Dmin:
3.00 in
D50:
9.00 in
Dmax:
11.25 in
Velocity and Manning's n calculations may not apply for this method.
Structure #16 LNuI/,�
Mine tie in to undist south leg
Structure #15 LNonerodible Channel
Uppr reach south leg undist
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 21.0 0.0350
2.63 ft
Nonerodible Channel Results:
Structure #14
Jct Sec 28 coll ditch w souh leg undist
Structure #13 (Nonerodible Channel1
South leg undisturbed
Triangular Nonerodible Channel Inputs:
Material: Bare rock
Filename: Sec 28 100 24.sc4 Printed 12 -08 -2010
Exh. 7- 20A -51 Revision Date: 12/31/10
Revision No.: TR -81
w/o Freeboard w/ Freeboard
Design Discharge:
20.15 cfs
Depth:
1.31 ft
Top Width:
2.63 ft
Velocity:
11.69 fps
X- Section Area:
1.72 sq ft
Hydraulic Radius:
0.464 ft
Froude Number:
2.54
Structure #14
Jct Sec 28 coll ditch w souh leg undist
Structure #13 (Nonerodible Channel1
South leg undisturbed
Triangular Nonerodible Channel Inputs:
Material: Bare rock
Filename: Sec 28 100 24.sc4 Printed 12 -08 -2010
Exh. 7- 20A -51 Revision Date: 12/31/10
Revision No.: TR -81