GENERAL42602

• Permit No: M1994117
• IBM Index Class Name: General Documents
• Doc Date: 5/29/1996
• Doc Name: RECLAMATION REQUIREMENTS FOR GOLD HILL MILL
• From: DMG
• To: FILE
• Media Type: D
• Archive: No

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DIVISION OF MINERALS AND GEOLOGY
Depanmenl of Nalu ral Resources
1313 Sherman 51., Raom '15
Denver, Colorado 80?03
Phone: [phone]
FAX: [phone]
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IIIIIIIIIIIII III
999
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DEPARTMENT OF
NATURAL
RESOURCES
DATE: May 29, 1996 Roy Romer
Governor
lames S Lochhead
TO: File NO. M-94-117 Executive Director
j Michael B Long
FROM: Allen Sorenson C~ Drviswn Director
RE: Reclamation Requirements for Gold Hill Mill
1. Deployment and anchoring of geotextile over the surface of the
tailings, taking care not to damage the tailing pond liner.
2. Placement of two foot minimum of chemically inert, well graded rock
fill over the geotextile covered tailing surface, taking care not to
damage the tailing pond liner. The graded rock fill may be borrowed from
the area above (north/northwest) of the pond, or may be imported from a
permitted off-site borrow or gravel pit. If a borrow area above the pit
is utilized, topsoil must be segregated for use in reclamation, and the
borrow area must be reclaimed by grading for positive drainage with slopes
not to exceed 3H:1V, topsoil replacement, and revegetation with grasses
trees and shrubs approved in the permit.
3. Placement of a minimum of 4 inches of topsoil over the graded rock
fill. Topsoil to be imported from an off-site source. The covered and
topsoiled tailings area will then be seeded with the grass mixture
specified in the permit, and mulched (wood fiber mulch is specified).
4. The outslope of the tailing pond embankment needs to be revegetated
using the grass, tree, and shrub species listed in the permit. Those
areas showing good vegetation establishment should not be redisturbed.
Bare areas need to be covered with 3 to 4 inches of topsoil and seeded and
mulched. Additional trees and shrubs may need to be planted (66 tree
seedlings and 29 shrubs seedlings specified for this area).
5. The ore storage yard and ramp to the coarse ore bin needs to be
reclaimed. This is to be accomplished by grading and shaping for positive
drainage, with slopes created less than 3H:lV preferred, but in no case
steeper than 2H:1V. Lime may need to be applied if the substrate is
acidic. Sufficient plant growth medium must be applied to assure
vegetation establishment that will meet the performance standard of Rule
3.1.10. The thickness of the plant growth medium to be required will
depend on the toxicity and acidity of the graded substrate, with a minimum
thickness of 4 inches specified. Prepared seed bed to be planted and
mulched in accordance with the approved plan. Tree and shrub seedlings
COLORADO