2001-12-11_PERMIT FILE - C1996084 ‎(6)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-21 MINE AREA P5 SEDIMENT CONTROL POND 5-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyngh11999 Pamela J. Schwab
Civil Solnvare Design
2
•
w/o Freeboard w/ Freeboard
X-Section Area: 6.60 sq ft
Hydraulic Radius: 0.119
Froude Number: 1.97
Manning's n: 0.0530
Dmin: 1.00 in
D50: 1.50 in
Dmax: 3.00 in
Structure #1 (Erodible Channel)
DS-1a.• w. uppersws, w. coal
Triangular Erodible Channel Inputs:
Material: Graded loam to cobbles when noncolloidal
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope slope (%) Manning's n Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
2.5:1 2.5:1 1.0 0.0300 1.00 5.0
•
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 36.94 cfs
Depth: 1.82 ft 2.82 ft
Top Width: 9.12 ft 14.12 ft
Velocity: 4.44 fps
X-section Area: 8.31 sq ft
Hydraulic Radius: 0.846
Froude Number: 0.82
Structure #3 (Erodible Channel)
D5-1 c: w, fill
Trapezoidal Erodible Channel Inputs:
Material: Graded loam to cobbles when noncolloidal
Left Right
Bottom Freeboard Freeboard Freeboard Limiting
Sideslope sideslope slope (%) Manning's n
Width (ft) R
R
ti
ti Mult. x
Depth (ft) % of Depth Velocity
(fps)
o
a
o
a (VxD)
20.00 2.5:1 2.5:1 3.6 0.0300 1.00 5.0
Erodible Channel Results:
Filename: 25pond6-1 rev.sc4 Printed OB-27-2001