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2022-07-29_REVISION - M2006084 (3)
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2022-07-29_REVISION - M2006084 (3)
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Last modified
8/1/2022 8:49:54 PM
Creation date
8/1/2022 8:25:13 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M2006084
IBM Index Class Name
Revision
Doc Date
7/29/2022
Doc Name
Request for Technical Revision
From
Old Castle SW Group, Inc dba United Companies
To
DRMS
Type & Sequence
TR1
Email Name
ACY
THM
AWA
Media Type
D
Archive
No
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Reclamation Plan <br />1. General Reclamation Plan <br />Exhibit E <br />The total disturbed area to be reclaimed under this permit is 92.7 acres. The post -mining land use for <br />the entire permit area will be lake surface and wetland in the lake areas and dry rangeland in the <br />areas above the wetlands. As seen in Map F, the final lake will have a varying shoreline to allow for a <br />more natural appearance. The mining plan contemplates the excavation of 5.60 acres of wetlands on <br />the site. The reclamation plan will create 19.45 acres of shelf and fringe wetlands. This is more <br />wetland reclamation than any other pit in the State of Colorado, as far as we are aware of. There are <br />an additional 3.06 acres of wetlands inside the permit area that will not be disturbed; therefore the <br />total wetlands area inside the permit after reclamation is 22.43 acres. <br />The final appearance of the varied shoreline and wetland shelves constructed may differ from that <br />seen on Map F. The groundwater level on site is believed to be within 2 feet of the land surface in <br />many areas, due to the presence of wetlands. Mining on the north and west sides is being conducted <br />to final slope conditions to avoid backfilling any wetlands excavated. <br />As described in the mining plan, reclamation of the side slopes will occur concurrently with mining. All <br />mine slopes outside of the wetland footprints of 2H:1 V will be backfilled to 3HA V or less to at least 5' <br />below the lake surface elevation. Along the north and west mining perimeter a 6H:1 V slope will be in <br />place down to at least 10 feet below the water surface to protect against erosion during high river <br />flows; most these areas will not be backfilled. From 10 feet below the water line and deeper, these <br />areas will remain at 2H:1 V slopes. Overburden from the current mining areas will be used to backfill <br />designated areas as mining progresses, and build the wetland shelf as shown on Map F. By doing <br />this, the distance that overburden will have to be transported, as well as the amount of material which <br />will have to be rehandled, will be minimized. Additionally, the acreage which is unreclaimed will be <br />minimized, which will make the worst case reclamation smaller and thus, the bond will be smaller. No <br />material will be stockpiled in any wetland footprint during reclamation. <br />No more than 5.0 acres of wetland shelf will require backfilling at any given time. <br />Topsoil will be replaced on the wetland shelf and areas outside the wetland footprint. In general, <br />reclamation will consist of ripping all areas to a depth of two feet and then restoring topsoil to a depth <br />of 12" to 18", using good upper horizon material from the salvage operation. Discing of soil will then <br />take place followed by seeding and mulching the topsoiled area. Ripping will take place immediately <br />prior to retopsoiling activities. Table E-1 below shows expected amounts of topsoil and overburden <br />required for reclamation. <br />Map F shows all the final contours and reclamation planned for the site. The access road will be left <br />intact so that the landowner has access to the reclaimed areas. Map C-4 shows the cross -sections of <br />the reclaimed terrain compared with the original and the mining terrain. <br />White River City <br />E-1 Lewicki &Associates <br />July 2022 <br />
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