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2007-12-17_PERMIT FILE - C1981020A (2)
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2007-12-17_PERMIT FILE - C1981020A (2)
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Last modified
8/24/2016 3:19:37 PM
Creation date
1/14/2008 5:07:33 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981020A
IBM Index Class Name
Permit File
Doc Date
12/17/2007
Section_Exhibit Name
2.0 Mine Plan
Media Type
D
Archive
Yes
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. Typically the haul road to the gob pile was 16 to 20 feet wide. The haul road was <br />plated with pit run gravel surfacing. This road is secured with a locked gate where it <br />crosses over Salt Creek. Therefore, use is very limited. The haul road will be used for <br />monitoring purposes after the mine was reclaimed in 2007. The haul road is located in <br />the valley floor to minimize erosion. There are no fords of ephemeral stream channels. <br />The haul road begins at SH139 and ends at east of the waste disposal area. <br />The road is approximately 6,300 feet long with an average grade of 2.3%. The <br />maximum pitch grade of the road is 3%. <br />There are virtually no road cuts on this haul road section. It was constructed on <br />grade in the valley floor. The relocated section of haul road was also constructed on <br />the valley floor. For the relocation of the haul roads on site, all vegetation material and <br />topsoil was removed from the design road bed, shoulders, and surfaces where <br />associated structures were be placed. Topsoil was placed in the topsoil stockpile. No <br />vegetation material or topsoil was placed beneath or in any haul road embankment. <br />Constru i <br />ct on <br />The following embankment specification applies to road sections not within the <br />disturbed area in accordance with Rule 4.05.2(4). In the placement of embankment for <br />the haul road, materials will be spread in layers approximately 12 inches deep, and <br />such lifts made uniformly over long stretches and for the full width of the embankment. <br />Each lift will be moistened or dried to a uniform moisture content suitable for maximum <br />compaction. Hauling equipment is routed both ways over the fill and routing varied <br />sufficiently to achieve uniform compaction. Compaction is carried to the edge of the fills <br />so that the final slopes are firm. A sheepsfoot roller or other suitable equipment may be <br />required to achieve compaction. Compaction of each lift continues until the unit dry <br />weight of the lift reaches a value not less than 90% of maximum unit dry weight attained <br />in a laboratory compaction test in accordance with the specifications of ASTM D 698, <br />Method D. <br />RN-05 2-7 09/07 <br />
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