PERMFILE125152

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 5/29/2006
• Section_Exhibit Name: 4.06 Topsoil
• Media Type: D
• Archive: Yes

. It should also be clarified that consistent with Map 6, Soils -South, there will be small areas
of rock outcrop, rocky steep slopes, etc. where the topsoil depth is 0 inches. Where this
occurs there will not be an attempt to recover topsoil or otherwise disturb the area before
disturbance by mining.
Colowyo does not plan to use overburden material for topsoil substitutes or as a supplement
to topsoil. Colowyo will remove topsoil before any mining operations commence and always
maintain a buffer zone between the area stripped of topsoil and the overburden drilling and
blasting operations.. As depicted on the Topsoil Handling Map (Map 28), the topsoil
handling program will result in an orderly sequence for the continuous removal, storage or
reapplication of topsoil. The redistribution of topsoil will be done at a time when the physical
and chemical properties of the topsoil can be protected from alteration while minimizing the
potential for erosion.
Topsoil and vegetation matter is windrowed during initial sediment pond construction then
typically re-spread onto the outslope of the pond embankment to facilitate revegetation and
erosion control.
The pond embankments are constructed utilizing in-place materials directly below the upper
topsoil zone. This colluvial material is "topsoil" in nature and will be utilized at a future date
for pond reclamation. Since the nature of the embankment material functions readily as a
topsoil material no additional topsoil will be required for final reclamation of the site.
• 4.06.3 Storaee
The estimated quantity of topsoil in stockpile is found in Table 2.05-1, Topsoil Balance As
Of October, 2005. Topsoil stockpiles exist for support facilities and the mining area. All of
the existing or proposed stockpiles result where immediate redistribution will not be
practical, either because redistribution areas are not available at the time of topsoil removal,
or because more topsoil is being removed than what will be necessary for immediate
redistribution. Any additional stockpiles may be placed on flat spoil backfill areas or stable
portions of the permit area where stockpiles will be protected from external effects of both
wind and water erosion. Stockpiles have also been placed to avoid disturbances other than
those incidental to their deposition and removal.
Colowyo utilizes a variety of methods to protect topsoil stockpiles from erosion. Colowyo
will utilize one or more of the following techniques to protect topsoil from erosion. Small
catchment berms and ditches may be employed to route surface runoff away from stockpile
areas. Sma11 sumps or dozer basins may be employed to collect runoff, Adjacent disturbance
areas may be ripped or otherwise roughened to reduce mnoff. Topsoil stockpiles may be
strategically placed and constructed to allow runoff to be routed around stockpile locations
rather than pond against a stockpile.
Topsoil marker signs will be placed on each stockpile to prevent inadvertent disturbance,
unnecessary compaction or contamination.
• At the locations where topsoil piles are located on undisturbed land, in place topsoil and
vegetation will not be removed prior to stockpiling topsoil.
4.06-2 Revision Date: 11/02/05
Revision No.: TR-62