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2007-11-29_REVISION - M1977205
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2007-11-29_REVISION - M1977205
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Last modified
6/16/2021 6:02:55 PM
Creation date
12/4/2008 3:31:28 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1977205
IBM Index Class Name
REVISION
Doc Date
11/29/2007
Doc Name
Adequacy review response
From
Greg Lewicki and Associates
To
DRMS
Type & Sequence
TR2
Email Name
SSS
Media Type
D
Archive
No
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RECLAMATION PLAN REVISIONS <br />1. General Reclamation Plan <br />Reclamation will occur concurrently with mining, with each mined out phase being reclaimed <br />once operations commence in the next phase. The exception to this plan is phase 1, which will <br />not be reclaimed until the end of phase 3. This is due to the presence of the crusher and screener <br />equipment along with various stockpiles. At the start of phase 4, the mobile crusher and screener <br />will be moved into phase 3 to be closer to the mining face, and allow the reclamation of phase 1. <br />The pit access ramp will remain at its location at the west edge of phase 3 throughout the mine's <br />life. This allows access to the pit and highwall without any new road disturbance. <br />All mining slopes will be reclaimed to 3H:1 V down to a point 10 feet below the water line, and <br />2H:1 V from there to the bottom. The amount of unreclaimed 2H:1 V mine slope that can be <br />present at any one time is approximately 3000 linear feet. Overburden on site is estimated at 3 to <br />6 feet deep, and therefore will be sufficient to reclaim the slopes. Topsoil will be laid to a depth <br />of 8 inches. The topsoil is estimated at 12 to 18 inches deep along phases 2, 3, & 4, allowing <br />more than enough for reclamation. In cases where mining took place to a vertical slope, added <br />backfill will be necessary to achieve the final slopes. This area will be backfilled to the final <br />slope as overburden is encountered. As of the technical revision of September 2007, the <br />backfilling of this area is accounted for in the bond. No future mining of near vertical slopes is <br />allowed. All sediment, waste water, and settling ponds will be backfilled as part of reclamation. <br />Again, overburden occurs on site in sufficient quantities to achieve all backfilling. <br />The final reclaimed condition will be a lake surrounded by naturally occurring wetlands. A total <br />of 33.7 acres of wetlands will be created via the seepage of groundwater on the north side of the <br />pit and the pit slopes. A discharge spillway will be constructed in the southwest corner of the <br />lake, as this is the low point. The discharge will be seeded with sweet bromegrass and irrigated <br />prior to the completion of reclamation in order to achieve vegetation for slope stability. A cross- <br />section of the discharge can be seen on the Lake Discharge Detail, and specifications of the <br />discharge follow. <br />Tri County Technical Revision Sept 07 5
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