2011-03-25_PERMIT FILE - C1981019A ‎(8)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/25/2011
• Doc Name: East Pit Recl Sequencing & Ditch Designs for Prospect Ditch, N Tribut E Pit Ditch & Final E Pit Ditc
• Section_Exhibit Name: Exhibit 07 Item 14 Appendix Exh7-14R
• Media Type: D
• Archive: Yes

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14
Structure Detail:
Structure #28 (Vegetated Channel)
Hdwtrs of Prospect Ditch
Trapezoidal Vegetated Channel Inputs:
Material: Smooth brome
Bottom Left Right Retardance
Freeboard Freeboard Freeboard
Limiting
Velocity
Width (ft) Sideslope Sideslope Slope ( %) Classes
Ratio Ratio
Depth ft % of Depth Mult. x (VxD)
P O P
(fps)
12.00 2.01 2.01 11.9 D, B
1.00
5.0
Vegetated Channel Results:
Structure #29 (Pond)
Pond PD2
Pond Inputs:
Initial Pool Elev:
Stability
Class D w/o
Freeboard
Stability
Class D w/
freeboard
Capacity
Class B w/o
Freeboard
Capacity
Class B w/
Freeboard
Design Discharge:
9.23 cfs
0.00%
9.23 cfs
Depth:
0.25 ft
1.25 ft
0.46 ft
1.46 ft
Top Width:
12.98 ft
16.98 ft
13.86 ft
17.86 ft
Velocity:
3.00 fps
1.54 fps
X- Section Area:
3.07 sq ft
6.00 sq ft
Hydraulic Radius:
0.235 ft
0.426 ft
Froude Number:
1.09
0.41
Roughness Coefficient:
0.0649
1 0.1888
Structure #29 (Pond)
Pond PD2
Pond Inputs:
Initial Pool Elev:
90.10 ft
Initial Pool:
0.01 ac -ft
`Sediment Storage:
0.00 ac -ft
Dead Space:
0.00%
*No sediment capacity defined
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
95.50 20.00 2.00:1 2.00:1 20.00
Pond Results:
Peak Elevation: 95.53 ft
Kgraph Detention Time: 9.11 hrs
Filename: ProspectR2 1024 Postmining2012.sc4 Printed 10 -27 -2010
Exh. 7- 14R -64 Revision Date: 10/29/10
Revision No.: TR -87