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INSPEC18189
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INSPEC18189
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Entry Properties
Last modified
8/24/2016 9:19:34 PM
Creation date
11/18/2007 9:24:20 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977215
IBM Index Class Name
Inspection
Doc Date
9/8/2003
Doc Name
Inspection Report
From
DMG
To
Homestake Mining Co
Inspection Date
8/26/2003
Media Type
D
Archive
No
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iPage 21 <br />MINE ID # OR PROSPECTING ID # M-1977-215 <br />INSPECTION DATE 8/26/03 INSPECTOR'S INITIALS RCO <br />OBSERVATIONS <br />This inspection was performed by the Division as part of its monitoring of Hard Rock and Metals 112 permits. The <br />operator was contacted about arranging a time for the inspection. The operator'srepresentatives named on page one were <br />present throughout the inspection. Representing the USFS/BLM was Ms. Diane Gese, who was present during most of the <br />inspection. <br />Recent earthwork has been carried out in an effort to improve water quality in Windy Gulch, as well as improve the <br />revegetation. These activities were approved under Technical Revisions TR-11 and TR-12. Several areas of the site were <br />inspected to verify the adequate completion of these activities. The required permit ID information was included on an <br />interpretive sign posted at the county-owned office building, adjacent to the former location of the 93601evel mill facility. <br />The 9360 portal was pneumatically backfilled after the hydraulic bulkhead was found to be functioning as required. The <br />sloped portal site has now been backfiNed and graded with large riprap from the 9700 level. The sloped area will not be <br />topsoiled and seeded. <br />The top surface of the 9360 level dump has been cleaned up and is closer to being fully reclaimed. Debris and irrigation <br />system piping have been removed, positive drainage into the gulch has been re-established, topsoil has been added to the <br />surface, the access road has been barricaded with an earth berm, the road has been ripped, and the road and dump have <br />been seeded (late June 2003). Precipitation during the month prior to the inspection has resulted insignificant germination <br />of the new seed. If the revegetation turns out to be adequate and grading does not erode, the surface work performed may <br />not have to be redone. Excess riprap at the site was used to berm the crest of the dump slope. This dump area will <br />continue to be monitored for stability. <br />The 9360 dump area contains a couple patches of Canada thistle, which do not yet show much evidence of having been <br />treated. The operator is aware of the patches and has a weed control plan for the site, so this is not considered a problem <br />at this time. However, the weeds must be closely monitored and treated in a timely manner if they are to be controlled <br />effectively. It would not be unreasonable to consult a weed control specialist in the area to determine if the chemical <br />presently is the best, or if another control method could be used in combination with the present plan. <br />The operator wants to remove the two vadose zone piezometers at this dump. These shallow monitoring points were used <br />only during the time the infiltration trench was in effect, and did not actually act as wells. The locations were dry in recent <br />years, and all water quality monitoring from these locations has been finished. The Division sees no need to maintain them. <br />Before actual removal, the operator should inform this office in writing of the intent and methods by which it is to be done. <br />The 9360 level riprapped channel and buried bypass line were inspected. The visible portions of the cutoff wall, manhole <br />vents and the concrete outlet box were completed according to the plan. There was no flow through the bypass line <br />during the inspection. The slope grading and riprapping in the channel appeared to be finished according to the approved <br />plan also. There were a few pieces of debris which have become revealed on the new surfaces, and the operator will <br />remove them. <br />The 9700 level dump and portal areas were inspected. The portal had previously been closed by backfilling, but the surface <br />slope grading needed to be improved. It now appeared to be adequate. The concrete transformer station pad had been <br />rubblized and removed, and the overhead electric line was shortened by one or two poles. The remaining electric service <br />does not belog to the operator, and will remain to serve other property owners in the area. A significant amount of debris <br />has been removed from the dump slopes, and the minor amounts still present will also be removed by the operator. The <br />opening to the Cleveland Tunnel (historic opening upslope from the trandfarmer pad) has been closed and graded. The <br />concrete cupoff wall, buried bypass line, concrete outlet box and channel riprapping all appear to have been completed <br />according to the approved plan. The gulch slopes have been graded to be more gentle and uniform, and much mineralized <br />material formerly on the surface is now gone. Topsoil was also spread on the dump slopes here. Germination is spotty, but <br />is still young (site seeded in early July 2003). <br />The upper tailings dam and pond were viewed from a distance, which was adequate since the site has not been active for <br />years and reclamation is well underway. <br />
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