1988-04-20_PERMIT FILE - C1981008A

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/20/1988
• Doc Name: Sedimentation Pond 005
• Section_Exhibit Name: Tab 13 Attachment E
• Media Type: D
• Archive: Yes

"Alternate B" (with riprap):
Minimum depth = 3.0 ft.
Side Slopes = 2:1
Ditch Slope = 1.3% to 32%
Maximum Velocity = 10 fps
Q = 10.5 cfs
Manning' s N = 0.04
Shape = V-ditch
The West Ditch will be constructed with the following minimum
dimensions:
"Alternate A" (without riprap):
Minimum depth = 2.0 ft.
Side Slopes = 2:1
Slope = 0% to 1.8%
Maximum Velocity = 2.65 fps
Q = 1.0 cfs-
Manning' s N = 0.025
Shape = V-ditch
"Alternate B" (with riprap) :
Minimum depth = 2.0 ft.
Side Slopes = 2:1
Ditch Slope = 1.8% to 50%
Maximum Velocity = 6.6 fps
Q = 1.0 cfs
Manning's N = 0.04
Shape = V-ditch
REMEDIAL COMPLIANCE PLAN
The present storage capacity and spillway configuration of Sediment Pond
No. 005 are inadequate. As a result of this, Peabody proposes the
following remedial actions be taken pending CMLRD approval :
1. Excavate the ponding area to provide the storage capacity
shown in Table 6.
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