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PERMFILE55703
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PERMFILE55703
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Last modified
8/24/2016 10:58:28 PM
Creation date
11/20/2007 4:42:44 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056A
IBM Index Class Name
Permit File
Doc Date
6/28/2006
Doc Name
pg 2.05-65 to 2.05-122.1
Section_Exhibit Name
2.05 Operation and Reclamation Plans Part 2
Media Type
D
Archive
Yes
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The water flow through the cells was modified to take advantage of additional retention time in the system. The <br />original flow-path focused on using two of the three cells at any one time. Presently, all three cells are utilized, <br />with a new inter-pond baflle system routing flows between the center and western cell. The baffles reduce the <br />• potential for short-circuiting, increasing the efficiency of the pond. The final component added to the system was <br />placement of an aerator in the western cell. This aerator may be fumed off after the one in the eastern cell is turned <br />on. <br />Due to the fact that the pH is being elevated, it was decided to have sulfuric acid available in the event a pH <br />adjustment was needed prior to the effluent dischazging from the system. The chemical and equipment for this <br />procedure is housed in the chemical storage building located on the west side of the west cell as shown on Map 32. <br />This system will be used only if the effluent approaches the pH discharge limitation of 9.0. <br />In 2006, the sodium hydroxide system was replaced with an electro-coagulation system which achieves the same <br />result through ionization and agglomeration of particulate iron. <br />The treatment ponds and associated surface facilities and systems will be removed and disturbed areas reclaimed <br />when no longer needed for treatment of mine-water discharge. Reclamation plans for this facility are summarized <br />on page 2.05-105.1. <br />Eastern Mining District - Dewaterine Borehole <br />The dewatering system will be divided into two components: 1) Dewatering borehole and control building, and 2) <br />Treatment facility. The dewatering borehole will be constructed above and into the sump developed off of the 10- <br />Right entry. Please refer to Map 23, Mine Plan, for the proposed location of the sump. Alight-duty road will be <br />constmcted into the site beginning at the treatment facility and terminating at the borehole. The beginning 1,600 <br />feet of this road will require new construction, while the remainder of the road will see the upgrading of an existing <br />ranch road. The location of the access road is shown on Maps 17 and 18. As shown on the maps, the overall length <br />• is approximately 4,600 feet. This proposed road location differs slightly from the original proposal in order to <br />allow for an entrance that has greater visibility, thus increasing the safety for those using the road. The beginning <br />1,600 feet of the access and light-duty road is the segment that differs from the original proposal. <br />During construction of the road, approximately 6,815 CY of topsoil will be windrowed to the side of the road. This <br />volume is based on constructing a road 4,600 feet long, 20 feet wide and salvaging topsoil to a depth of 24 inches. <br />The topsoil will be stockpiled adjacent to or windrowed to the side of the road. The stockpiled topsoil will be <br />seeded with the pastureland seed mixture applied at the appropriate rate. The finished width of the road will be <br />approximately 12 feet and it will be covered with approximately 9 to 12 inches of 6-inch pit run and 3 to 4 inches of <br />1 %:-inch road base or crashed rock. It is planned to install culverts along the road. For definition purposes, the <br />beginning 700 feet is an access road and the remaining 3,900 feet is a tight-duty road. The design calculation for <br />these culverts, numbered EMD-I through EMD-4, is presented in Exhibit 8A, Culvert Sizing -EMD Dewatering <br />Facility Access Road. <br />While permitted for installation of a water treatment facility, the only facilities currently existing (2006) aze the <br />EMD (10-Right) borehole and associated light-use road, Reclamation will involve culvert removal and ripping, <br />grading, soil replacement, and revegetation of the borehole pad disturbance and road. <br /> <br />TR06-52 2.05-77.1 05/16/06 <br />
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