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2010-04-20_REVISION - M2000158
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2010-04-20_REVISION - M2000158
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Last modified
6/15/2021 3:06:08 PM
Creation date
4/21/2010 7:23:27 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2000158
IBM Index Class Name
REVISION
Doc Date
4/20/2010
Doc Name
Adequacy Review #1
From
DRMS
To
Civil Resources, LLC
Type & Sequence
AM2
Email Name
JLE
AJW
Media Type
D
Archive
No
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16.) Around the perimeter of where the overburden is designated to be stripped (the <br />grey area on the Exhibit C map) please indicate what horizontal to vertical slope ratio <br />will be left in place. Also, this slope must be displayed accurately on the Reclamation <br />Plan Map. <br />17.) How will the designated floodway be impacted by excavating overburden directly <br />adjacent to its boundary? It would appear this could change/impact the course of the <br />floodway. Please explain? <br />18.) The embankment diagrams depicted on the Exhibit C map indicate various depths <br />overburden and topsoil will be placed on the exterior slopes of the embankments. First, <br />overburden should not be mixed with the topsoil. The current approved reclamation <br />plan calls for the placement of 6" of topsoil at a minimum over the affected lands <br />designated for revegetation. Overburden will need to be placed prior to and separately <br />from topsoil. The "Dam Typical Section A" diagram indicated 4-6 inches of overburden <br />and topsoil will be placed on the exterior of the embankment. Please correct the <br />diagram to indicate 6" of topsoil will be placed on the exterior to the embankment <br />slope. Also, the "Dam Typical Section B" diagram indicates the top layer of material <br />placed on the exterior slope of the embankment will be made up of 6" of <br />overburden/topsoil. Please correct this to indicate that 6" of topsoil will be placed on <br />the exterior slope of the embankment. <br />19.) Will the revegetation plan remain the same as currently approved in terms of <br />fertilization, seedbed preparation, and vegetation establishment? <br />20.) Slurry Wall: <br />-The applicant states the bentonite will meet the API 13a standards. Please <br />provide the bentonite manufacturer's certificate of compliance. If these are <br />unavailable, please commit to providing them with the final construction report <br />and certification. <br />-The plan indicates the slurry wall trench will be keyed into base layer at least <br />one foot or as directed by the owner/engineer. The dam cross-sections enclosed <br />in the Exhibit C map indicates the slurry wall will be keyed into the base layer at <br />a three foot minimum. Please clarify this discrepancy. If the base layer is <br />weathered, fractured, or contains sand lenses, it may be necessary to provide a <br />deeper key trench. <br />21.) Will reclamation be done in phases and concurrently with mining? The slurry wall <br />plan indicates the slurry wall will be installed in the following order: Ponds D1, D2, C1, <br />C2, B, and A respectively. Will the embankment be constructed for each pond after the <br />slurry wall has been installed for each cell, or will it be concurrent with slurry wall
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