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2011-09-27_REVISION - M1990057 (10)
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2011-09-27_REVISION - M1990057 (10)
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Last modified
6/16/2021 6:12:53 PM
Creation date
9/29/2011 11:33:52 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1990057
IBM Index Class Name
REVISION
Doc Date
9/27/2011
Doc Name
Revised TR-03, with Adequacy Responses Incorporated.
From
The Union Milling Company
To
DRMS
Type & Sequence
TR3
Email Name
MAC
Media Type
D
Archive
No
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MILLING PLAN <br />The mill site is a separate, stand -alone facility with no mining operations on or immediately <br />adjacent to the facility. All ore is trucked to the facility and all concentrates are trucked to a <br />smelter. Mill tailings are stored onsite. <br />There is no mining excavation, consequently there is no overburden removal or overburden <br />stockpile, no waste rock stockpile, no ore deposit excavation and no related mining events. <br />There is no groundwater that will be encountered, dewatered, contained or discharged. There <br />will be no explosives used. <br />The mine, supplying RoM ore for the mill, uses a modified cut and fill extraction method, <br />necessitating cemented tailings backfill as mining progresses. The mill will implement further <br />tailings dewatering and supply the mine with the needed material, backhauling in the ore trucks. <br />This tailings backhaul will increase the life of the TSF. <br />MILL SITE <br />The mill is scheduled to recommence operations in August 2011 and the existing facility, with <br />reconstructed TSF tailings impoundment dams, has sufficient tailings capacity to operate <br />approximately 4 years at 160 tons /day (assuming no tailings backhaul). The life of the mill is <br />constrained by the 110 permit maximum disturbance and a 2 -lift Phase 1 and Phase 2 TSF pond. <br />Further expansion or Phases will require a 112 permit. <br />Leadville Mining and Milling, Inc. constructed the mill in 1988 to process ore from its <br />Hopemore Mine. The mine and mill commenced production in 1989 and operated sporadically <br />for less than two years. A building permit was obtained in December 1987 and certificates of <br />occupancy were issued for the crusher building on October 5, 1990 and the mill building on <br />November 9, 1990, as shown in Figures C -1 and C -2, respectively. Double panel windows in the <br />walls with southern exposure were incorporated in the original mill building to contribute to <br />heating with passive solar assistance. <br />The current facility includes two (2) separate metal buildings (crushing building and grinding, <br />flotation building) connected by a conveyor crossover bridge, electric utility line, trailer <br />foundation, septic tank, upper and lower gravel mill access roads, three (3) ore stockpile storage <br />pads, one (1) topsoil storage pad, one (1) TSF overburden stockpile for dam excess cut material <br />and one (1) TSF dam and pond redesigned to meet compaction standards, as presented in Exhibit <br />TSF -01. The entire property is fenced with a 5 -strand barbed wire fence. <br />The mill is accessed by a gravel access road connecting with US Highway 24. RoM ore haulage <br />is on the upper mill road. All concentrate shipments and chemical deliveries are on the lower <br />mill road. <br />The chemical/reagent storage room is being relocated internally within the grinding /flotation <br />building. Now located adjacent to the fine ore feed bin, chemicals and reagents are contained <br />within individual primary containment over - barrels. Any secondary leakage, or containment <br />issues with the stored chemicals or reagents is directed to the mill sump and then to the TSF <br />pond. <br />Laboratory facilities are all contained within the grinding/flotation mill building, immediately <br />south of the office /safety /training/change house facility extension within the previous <br />M1990 -057 September 27, 2011 <br />
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