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PERMFILE54436
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PERMFILE54436
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Entry Properties
Last modified
8/24/2016 10:57:32 PM
Creation date
11/20/2007 4:09:48 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1994117
IBM Index Class Name
Permit File
Doc Name
APPLICATION FOR A MILLING AND RECLAMATION PERMIT GOLD HILL MILL LIMITED IMPACT PERMIT
Media Type
D
Archive
No
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i r <br />flowing from this area moat progress a distance of at least 3,300 feet to reach <br />the drainage culvert. <br />Because of the crystalline nature of the Boulder L`reek granite, the ground <br />water that is found in the bedrock is only present where the granite has been <br />fractured. Generally, the openingx of these fractures (joints and faults) de- <br />crease 1a size with increasing depth, sad the chances of obtaining water are <br />significantly reduced below a depth of 300 feet. This crystalline bedrock has a <br />very limited water storage capacity, and most of the remA~n~*+g water that fella <br />ae precipitation is returned to the atmosphere by evapotranspiration. 'Ilse <br />ground water that is present in these racks probably migrates downward and <br />laterally through a nor~theaet-southwest trending fracture system towards the <br />area above Caeh Gulch. The presence of a small spring several hundred feet <br />below the Hazel A edit tends to support this observation. 'The flow fiom this <br />spring varies considerably with the time of the year. It usually decreased <br />throughout the summer and fall as the amount of water atoned in the fracture <br />system also decreases. <br />The U.S. Bureau of Mines drilled five test holes 200 feet south of the proposed <br />tailings impoundment area, and monitored the amount of ground water that <br />flowed into these drill holes. 'These testa established that the ground water <br />level dropped from 53 feet to 86 feet below the surface during the period <br />between September and December. Since it is situated 30 to 65 feet higher <br />than the elevation of the U.S. Bureau of Mines' test area, the ground water <br />level under the White Cloud and Wynona mines, and the proposed millsite and <br />tailings impoundment area is somewhat lower than 53 feet below the surface. <br />A similar decline in the ground water level undoubtedly occurs beneath these <br />areas during these same months. <br />Vegetation Information <br />No rare, threatened, or endangered plant species have been identified in the <br />Gold Hill area, or on the mill sites. The previously submitted Cash Mine Permit <br />Application included descriptions and lists of the trees, grasses, forbe, and <br />shrubs that have been identified in this area. <br />The present vegetation on the land surface that were affected by the construc- <br />tion of the mill and tailings retention structure, varied from scattered to <br />moderately vegetated. Because of their acidic nature and poorly developed Boil <br />profile, the mine dumps have a vegetation cover that conaixte of a few small <br />stands of Ponderosa Pine and low shrubs on their eastern and southern faces. <br />The percentage of ground covered by vegetation can be directly attributed to <br />the date or period of the let mining activity on the property. Since the White <br />Cloud mine was last worked during 1905, it has a thicker stand of small pon- <br />derosa pine growing on its mine dump than on the Wynona mine dump, which <br />was worked during the 1940'x. Approximately 50 percent of the White Cloud <br />mine dump is covered by vegetation, the nearby Wynona mine dump has only <br />about 35 percent of its surface covered by small pine trees and shrubs. The <br />vegetation at the Who Do mine is estimated tp rnver approximately 15 percent <br />
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