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2015-01-27_REVISION - M1979191 (14)
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2015-01-27_REVISION - M1979191 (14)
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Last modified
6/15/2021 2:30:20 PM
Creation date
1/28/2015 11:51:02 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1979191
IBM Index Class Name
REVISION
Doc Date
1/27/2015
Doc Name
Three Bells Mine Adequacy Response AM01
From
GEI Consultants, Inc.
To
DRMS
Type & Sequence
AM1
Email Name
ECS
Media Type
D
Archive
No
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proposed post - mining land use for Phase 5 and the Veldman Property, inelu :„„ residential <br />neighbor-hoods and fa i _ <br />The Veldman pond slope liners was completed in late 2014 and isare designed to meet SEO <br />seepage requirements. The slope liners extend to the top of the pit highwall, which results in <br />the construction of slope liner above the high waterline. This is done to minimize <br />groundwater seepage into the pit—.A and has a minimum freeboard of 2 feet_ has <br />ate. <br />The slope liner is as 20 -foot wide crest sloping 1% toward the reservoir. The <br />crest transitions into a 3:1 (H:V) slope extending to bedrock. Stability and seepage analyses <br />indicate this slope configuration and crest width will be stable under existing site conditions. <br />Overburden obtained from the stripping on Veldman property soil appeafs to meetmet project <br />specifications for slope liner embankment fill. This overburden will -bewas utilized as a <br />borrow source during slope liner construction. <br />A cutoff keyed. was used at the base of the liner, offset approximately 5 feet from <br />the prepared mine highwall. The cutoff w-iWextended five feet into the claystone bedrock as <br />directed during construction. The key will -beis approximately 8 feet wide at the base. <br />Approximately 1 foot of weathered bedrock should b was stripped from within the slope <br />liner footprint. Material excavated during foundation preparation including Eentaminated- <br />non- marketable pit run and bedrock afoul -wasbe placed within the footprints of the ponds.- <br />This material should not be utilized as r-eadway fill. <br />Shaping of the reservoir bottom should did not encroach within 25 feet of the toe of the slope <br />liner and reservoir floor excavation slopes, �" " st oul t and did not exceed a slope of <br />6:1. The reservoirs should b were graded to the bedrock low point, as noted in the <br />construction plans. <br />5.2 Top Soiling <br />Topsoil placement, to a minimum of 6 ", will occur as reclamation activities as-in areas that <br />are free from mining activity. Primary areas to receive topsoil as reclamation during the <br />mining process are low -lying areas and other areas in need of fill, such as haul roads and hftul <br />readsslope liners which lie above the normal high water level (NHWL). Site access roads <br />will be remain in their current state through reclamation. <br />5.3 Wildlife <br />The wildlife plan will not change from the original permit issued, Pen-nit M- 1979 -191. <br />GEI Consultants, Inc. 17 June - January 20145 <br />Three Bells Mine Reclamation Permit Amendment <br />
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