2001-12-11_PERMIT FILE - C1996084

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-26 MINE AREA P7 SEDIMENT CONTROL POND 7-4
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copynght 1998 Pamela J. Schwab
Civil Software Oesign
•
Structure Detai/:
Structure #1 (Erodible Channel)
D7-4b: veg. slope, s. fill, s. coal
Trapezoidal Erodible Channel Inputs:
Material: Graded loam to cobbles when noncolloidal
Left Right
Bottom Freeboard Freeboard Freeboard Limiting
sideslo a Sideslo a Sloe % Mannin s n
P D P( ) 9'
Width (ft)
Mult. x Veloci
ry
Ratio Ratio Depth (ft) % of Depth (VxD) (f Ps)
7.00 3.0:1 3.0:1 4.7 0.0300 0.30 5.0
Erodible Channel Results:
u
w/o Freeboar /Freeboard
Design Discharge: 14.15 6s
Depth: 0.36 ft 0.66 ft
Top Width: 9.13 ft 10.93 ft
Velocity: 4.93 fps
X-Section Area: 2.87 sq ft
Hydraulic Radius: 0.310
Froude Number: 1.55
Structure #1 (Erodible Channel)
D7-4a: n, coal, n, fill, veg.slope
Trapezoidal Erodible Channel Inputs:
Material: Graded loam to cobbles when noncolloidal
Left Right
Bottom Freeboard Freeboard Freeboard Limiting
5ideslope sideslope Slope (%) Manning's n
Width (ft)
Mult. x
f Velocity
Ratio Ratio Dep[h (ft) % o
Depth
(VxD) (fps)
15.00 3.0:1 3.0:1 8.8 0.0300 0.30 5.0
Erodible Channel Results:
•
w/o Freeboa w/ Freeboard
Design Discharge: 15.94 ffs
Depth: 0.21 f[ 0.51 f[
Top Width: 16.23 ft 18.03 ft
Velocity: 4.98 fps ~
X-Section Area: 3.20 sq k
Hydraulic Radius: 0.196
Filename: 100pond7-4.sc4 Printed 04-24-2001