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GENERAL54560
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Last modified
8/24/2016 8:39:47 PM
Creation date
11/23/2007 9:38:08 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981047
IBM Index Class Name
General Documents
Doc Date
12/18/1992
Doc Name
Proposed Decision & Findings of Compliance for RN2
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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limited livestock grazing. However, for the most part, the surrounding land <br />is undeveloped and is used primarily as wildlife habitat. Recreational <br />activities such as big game hunting, trapping, fishing and off-road driving <br />also occur in the general area. <br />Cultural and Historic Resources - Rule 2.04.4 and 2.05.6(4) <br />Cultural and historic resources are discussed in Section 2.04.4 of the permit <br />application. <br />In October 1977, Centuries Research, Inc. conducted a cultural resource survey <br />of the Blue Ribbon proposed mine site. The survey found the area to contain <br />no cultural resources. The State Historical Preservation Officer concluded <br />that the Blue Ribbon Mine would not impact significant cultural resources. <br />Hydrologic Balance - Rule 2.04.5, 2.04.7, 2.05.3(4), 2.05.6(3) and 4.05 <br />Groundwater information can be found in the permit document in Section 2.04.7. <br />The locations of monitoring sites can be found in Exhibit Z. <br />A description of groundwater occurrence and mining impacts on groundwater <br />within the permit and adjacent areas can be found in the "Probable Hydrologic <br />Consequences of Mining" section of this document and the "Cumulative <br />Hydrologic Impact Study" document for this mine area. <br />The coal outcrop of the E seam, which Blue Ribbon has mined, is about 80 to <br />100 feet above the stream bed of Hubbard Creek. The disturbed areas and <br />underground mine areas are upland to the alluvial valley materials. The major <br />portion of the mine workings are above the level of Hubbard Creek, so the mine <br />presently does not experience any inflows which can be directly related to <br />water flowing in Hubbard Creek. <br />The alluvium of Hubbard Creek is the only aquifer which was used within the <br />permit and adjacent areas. This aquifer supplied the water that was consumed <br />at the Blue Ribbon Mine. This aquifer is an isolated body of alluvium. Up- <br />and downstream of the mine, the Hubbard Creek stream valley narrows and the <br />stream flows over resistant sandstone bedrock. <br />The Rollins Sandstone is the most significant regional bedrock aquifer in the <br />North Fork drainage basin. This aquifer outcrops in a narrow steep reach <br />along Hubbard Creek about a mile downstream of the mining operation. Recharge <br />to this aquifer is limited within the Hubbard Creek drainage. The potential <br />use of this aquifer is limited by the steep valley slopes below the mine and <br />the aquifer's limited recharge area. No groundwater from the Rollins <br />Sandstone will appear as mine inflows within the Blue Ribbon Mine, since the <br />mine workings are all stratigraphically above the Rollins Sandstone. <br />The E coal seam is not an aquifer. The mine workings are dry, except in a few <br />areas of fracturing. <br />Surface water information can be found in Section 2.04.7 of the permit <br />document. The locations of monitoring sites can be found in Exhibit Z. <br />-5- <br />
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