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REV99544
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REV99544
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Entry Properties
Last modified
8/25/2016 3:23:25 AM
Creation date
11/22/2007 12:27:51 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977215
IBM Index Class Name
Revision
Doc Date
11/3/2003
Doc Name
Reponses RE: TR-11
From
Homestake Mining Company
To
DMG
Type & Sequence
TR11
Media Type
D
Archive
No
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Mr. B. Oswald <br />10f30/03 <br />Page 2 of 3 <br />Question fit °Was the planned 2003 seeding carried out, and if so, what results have been observed <br />so far this season?" <br />Response: Seeding of all site disturbances related to the work on the 9360 and 9700 rock <br />disposal areas, the related water diversion bypasses, and the work areas at the lower tailings <br />facility was completed during the 2003 field season. Germination and vegetative response has <br />occurred in most areas to varying degrees as of Fall, 2003. Revegetation areas will be <br />monitored in the 2004 and successive growing seasons to assure that sufficient vegetation is <br />established. <br />Question #3: °HOW stable are the recentty created slope surfaces? Have there been rains during this <br />latter part of summer, and if so, has erosion been observed?° <br />Response: To date, no slope areas have evidence of instability. This will be monitored in the <br />future and any identified stability issues addressed. Significant precipitation was not observed <br />this last season partially due to sustained drought conditions; erosion, therefore, has not <br />occurred on any of the reclaimed areas. <br />Question #4: As part of the grading and topsoil borrowing from the lower tailings dam, was the top of <br />the tailings dam graded to an undulating shape, as first discussed in the plan?" <br />Response: Some undulation was incorporated to the dam top; most of the grading emphasis <br />was placed on assuring that the top was free-draining on the surface and that water would not <br />be conveyed to the downstream face of the dam. In addition, the top was generally gently <br />sloped to the interior of the impoundment as part of the grading effort necessary to move soil <br />cover onto the in-place tailings surface. This was accomplished with use of a dozer in <br />combination with truck haulage of soil to areas of exposed tailings farthest from the dam. <br />Question #5: °The long haul road to the lower tailings dam was to be stabilized, with better drainage <br />controls among other things. Was any such work performed?" <br />Response: Yes. See response to Question #1 above. <br />Question #6: °Was a vehicle barrier constructed to prevent unauthorized access to the 9700 level <br />dump, as suggested by this office? Is the bac~lling and contouring of the minor add performed at the <br />97001evel stable?" <br />Response: A vehicle rock barrier has been placed across the road to prevent vehicular access <br />onto the 9700 waste rock site and closed portal area. The old adit was graded and covered; to <br />date, the area is stable and will be monitored along with the other reclaimed areas in the 9700 <br />vicinity. <br />Question ry7: "Is the pneumatic backfilling and surface contouring of the 9360 portal stable? Is the <br />area outside the portal dry and has all construction debris been removed?" <br />Response: The 9360 pneumatic backfill as well as the cover over the portal entry have been <br />stable to date with little expectation that settling or erosion will occur in the future. This area will <br />be inspected during future reviews of the reclaimed site. <br />Question #8: "What is the status of the noxious weed control efforts at the sde? Are existing stands <br />being adequately contained?" <br />Response: Herbicide controls have continued on areas of identified Canadian thistle <br />populations. Thistle areas that have been sprayed for the last several seasons appear to be <br />shrinking in size and health, however, complete control has not been achieved. It is doubtful <br />that total eradication can or will be achieved. Spray application control will continue on <br />identified thistle locations within reclaimed site areas. <br />Question f19: Are areas of new construction/reclamation showing any signs of infestation?" <br />Response: Not at this early stage after reseeding of disturbed areas. The areas will be <br />monitored and herbicide applied to any new identified areas of thistle. <br />
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