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PERMFILE139620
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PERMFILE139620
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Entry Properties
Last modified
8/24/2016 10:42:47 PM
Creation date
11/26/2007 8:47:30 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1983141
IBM Index Class Name
Permit File
Doc Date
7/18/1983
Doc Name
LIMITED IMPACT AND SPECIAL TEN DAY PERMIT APPLICATION FORM
Media Type
D
Archive
No
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because their roots can only penetrate this soil to a depth of <br />Less than twenty inches. Since roots can penetrate to a depth <br />•,• of forty to sixty inches in the Peyton series soils, this <br />soil's vegetation is characterized by taller grasses. The <br />Allens Park soils support an intermediate understory of grass <br />•' with roots penetrating this soil to a depth of between twenty <br />and forty inches. <br />Most of the affected land surface subject to this application <br />for a mining permit is composed of waste dump material from <br />previous mining operations dating back to the 1670's. None of <br />the land surface disturbed by these earlier operations was re- <br />claimed. No soil has developed on the steep portions of the <br />Cash mine dump or on the top of the dump which has been used <br />as an ore stockpile area and roadway. The area surrounding <br />the margins of the mine dump and the mine buildings has a soil <br />cover that varies from zero to a maximum of four or five <br />inches in and among numerous outcrops of Boulder Creek gran- <br />ite. The upper Cash Gulch area contains small areas of Peyton <br />series soils in the drainage way between the Hazel A mine and <br />the southwestern portion of the Cash mine. Below the Cash <br />mine portal, in Cash Gulch, a narrow band of Allens Park soils <br />has formed from weathered Boulder Creek granite and trans- <br />ported material, <br />EXHIBIT E: Reclamation Plan <br />The ultimate goal of the Cash mine reclamation plan is to re- <br />turn the land surface affected by this mining operation to a <br />forest environment that will have an enhanced suitability for <br />wildlife habitation. This plan will be centered around the <br />reclamation of the Cash mine dump, the access roads, and the <br />quality of the water that intermittently flows into Cash <br />Gulch. <br />The most significant aspect of the Cash mine reclamation plan <br />is the removal of approximately 408 of the Cash mine dump. At <br />the present time, the mine dump is a mixture of gold-silver <br />telluride bearing quartz vein and waste rock which is gran- <br />itic, aplitic or pegmatitic in composition. While the ore <br />bearing quartz vein is invariably associated with pyrite, <br />galena and sphalerite, the waste rock is generally free of <br />sulfides. The exposure of these sulfides to the atmosphere <br />and to surface water during the last 112 years has, resulted in <br />their weathering, oxidation, leaching, and erosion. The sepa- <br />ration and removal of the ore bearing vein and its accompany- <br />ing sulfides will greatly reduce the degradation of the envi- <br />ronment that occurs when this material is left exposed on the <br />surface of the land. <br />Because of its composition, acidic nature, and steep slope <br />gradient, topsoil has not developed on the Cash mine dump. <br />The lack of topsoil on the mine dump obviates the requirement <br />for removing, segregating and stockpiling topsoil from this <br />portion of the permit area. <br />The present slope gradient of the Cash mine varies from 808 on <br />the northeastern face to 688 on the eastern face to 718 on the <br />southern face. The undisturbed surface of the land near the <br />western edge of the mine dump has a 368 slope gradient. At <br />the completion of the Cash mine dump operation, the antici- <br />pated slope gradient is expected to range between 408 and 458, <br />with terraces constructed at irregular intervals along the <br />southern and eastern faces (see Map E). This slope reduction <br />will be effective in helping to achieve runoff control by re- <br />ducing the velocity of the water that flows over the mine dump <br />when it rains or snows. Runoff control will be instrumental <br />in helping to establish vegetation and in decreasing erosion. <br />The terraces will also serve to intermittently reduce the <br />water velocities and to provide stability to the surface of <br />the mine dump. A series of diversion ditches will be exca- <br />vated in a configuration nearly parallel to the surface con- <br />tours on the terraces and on the lower access road. These <br />diversion ditches will collect water moving along the slope, <br />and convey it out of the disturbed area where it will be dis- <br />-15- <br />
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