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2008-09-18_REVISION - M1978091UG
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2008-09-18_REVISION - M1978091UG
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Last modified
6/15/2021 5:39:01 PM
Creation date
9/22/2008 4:20:20 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1978091UG
IBM Index Class Name
REVISION
Doc Date
9/18/2008
Doc Name
Response to adequacy review letter
From
Gault Group, INc.
To
DRMS
Type & Sequence
AM3
Email Name
RCO
Media Type
D
Archive
No
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the waste rock. The flow system will be re-established during the dry season, and will likely, <br />take the form of seeps, rather than a surface expression of flows given the unconsolidated nature <br />of the setting. <br />Level 6 Portal <br />The Level 6 portal will be reclaimed at the termination of all mining activity with the use of a <br />polyurethane foam plug since the portal has a demonstrated history of being dry. The Golden <br />Wonder underground workings have been sufficient to contain and route encountered water back <br />into the underground system. There have been no surface discharges from the portal for years. <br />The workings occur relatively high in altitude and thus do not gain a significant amount of head <br />pressure. The underground water is a reflection of surface melt, and is quickly abated by the <br />existing fractures and workings within the mountain. Since mining activities in the future will be <br />accomplished in much the same way as they have in the past, it is reasonable to assume that <br />water will be managed and will not reach the surface. Therefore the use of PUF seal should be <br />adequate for this portal. <br />The portal will be PUF sealed and `anchored' into the side walls with the use of re-bar. The final <br />portion of the portal will be back-filled as part of the waste rock removal effort. The overlying <br />material will be part of the waste rock storage, and will ultimately be capped with alluvium. <br />The newly refurbished portal has dimensions of 11 feet in width, and 8 feet in height. The PUF <br />seal plug would likely be placed at the incline (approximately 25 feet underground) where the <br />portal dimensions are on average: 8' by 8'. This position represents the best point to install the <br />PUF seal which will be 8' wide by 8' tall by 6 ft in length (to meet manufacturer specifications <br />for product application). This volume requires -14 cubic yards of material; which equates to '14 <br />boxes or applications at - 200.00$/box (dependent upon market prices since PUF Seal is a <br />petroleum derivative). The remaining portion of the portal (19 feet in length) will be backfilled <br />with waste rock material excavated from the waste rock removal (total volume needed 45 cubic <br />yards). Once the portal is filled, the `cut' slope of which the portal is a part of, the portal is a part <br />of, will be `benched' as per the Level 6 pad waste rock removal efforts. Ultimately the material <br />will be sloped to match the adjacent land form gradients, covered with top soil and reseeded. <br />13
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