2001-12-11_PERMIT FILE - C1996084 ‎(2)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-25 MINE AREA P7 SEDIMENT CONTROL POND 7-3
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J Schwao
Civil Software Design
•
Lek Right
Bottom Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width (R)) Mult. x
Depth (ft) %of Depth
Ratio Ratio (yxD)
2.00 3.0:1 3.0:1 8.5 0.30
Riprap Channel Results:
PADER Method -Steep Slope Design
wJo Freeboard w/ Freeboard
Design Discharge: 52.71 cfs
Depth: 1.24 k 1.54 R
Tap Width: 9.44 R 11.24 ft
Velocity: 7.43 fps
X-Section Area: 7,09 sq k
Hydraulic Radius: 0.721
Froude Number: 1.51
Manning's n: 0.0470
Dmin: 3.00 in
D60: 6.00 in
Dmax: 9.00 in
• Structure #5 (Pond)
Pond Inputs:
Initial Pool Elev: 6,644.50
Initial Pool: 0.07 ac-k
"Sediment Storage: 5.47 ac-ft
Dead Space: 20.00
*Sediment capacity based on Average Annual R of70.0 for? year(s)
Perforated Riser
Riser Riser Height Barrel Barrel Barrel Slope Number of
'
Diameter (R) Diameter Length (ft) (%) s n Spillway Elev Holes per
Manning
(in) (in) Elev
12.00 6.00 8.00 80.00 3.00 0.0240 6,646.00 4
Emeraencv Soillwa
Spillway Elev Crest Length Lek Right Bottom
(ft) Sideslope Sideslope Width (k)
6,650.00 10.00 2.50:1 2.50:1 2.00
Pond Results:
Filename. pond?-3.sc4 Printed 04-24-2001