Laserfiche WebLink
Cross Mine(M1977-410) Technical Revision No.5 <br /> 1. Introduction <br /> This Technical Revision (TR) is proposed in response to a letter from DRMS dated February 12, 2020 in <br /> conjunction with Permit No. M-1977-410. This TR includes a detailed plan of action for addressing the <br /> impaired surface water quality that was noted in the letter.This plan describes measures that are being <br /> taken and are further proposed at the site to address the water quality issues. This includes work <br /> performed underground, repairs to the water management system, and also includes an estimated <br /> timeline for completion the proposed work. <br /> As of the time of this TR,Calais Resources Colorado, Inc.on April 23, 2020 has submitted an'Application <br /> form for Transfer of Mineral Permit and Succession of Operators',to Grand Island Resources, LLC. (GIR) <br /> who Is the currently the owner of all the mining claims at the Cross Mine with Permit No. M-1977-410. <br /> Both Grand Island Resources,LLC.,and Calais Resources Colorado,Inc are subsidiaries of Calais Resources, <br /> Inc. <br /> 2. Background <br /> The Cross Mine site is located approximately 3 miles west of Nederland, Colorado adjacent to the <br /> Roosevelt National Forest,at an elevation of 9700 feet above mean sea level(MSL).The general location <br /> is parcels of land in Section 9,Township 1 South, Range 73 West of the 6 Principal Meridian, County of <br /> Boulder,State of Colorado,as shown on Map 1. This is an existing hard rock mining operation owned by <br /> Grand Island Resources Inc. (GIR), although at present, no active mining is being conducted. The entire <br /> permit area is on various properties either owned outright by GIR or granted through various lease <br /> agreements,as shown on Map 2. <br /> The mine permit M-1977-410 was last revised through Amendment No. 1(AM-1),approved in 2012.AM- <br /> 1 increased the permit area from 2 acres to the current 9.35 acres, provided for surface waste rock <br /> disposal resulting from construction of the Cross Mine Decline portal,and construction of a new office/dry <br /> facility and a new sewer line and leach field. Map 3 depicts the permitted disturbances as approved <br /> through AM-1. This proposed TR will not result in an increase in the permitted disturbance. <br /> The mine is currently in exploration and development stage but will ultimately operate throughout the <br /> year, producing ore of various metals to include gold,silver, lead and zinc.Total annual production of ore <br /> and waste rock will not exceed 70,000 tons per year. The approved mining plan is centered on mining, <br /> waste rock storage,and ore storage activities in the Cross Mine area,and on primarily waste rock storage <br /> in the Caribou Mine area. The waste rock at the site consists primarily of quartz monzonite and gneiss, <br /> and is not considered to be acid-producing or metals-leaching material. <br /> The general arrangement of the Cross Mine facilities and the permit boundary is shown on Map 4. <br /> However,the permit boundary as depicted on Map 4 and other maps and figures presented with this TR <br /> needs to be verified by survey and staked in the field. <br /> As indicated on Map 4,the site is bisected by Coon Track Creek,a tributary of Beaver Creek which flows <br /> into Middle Boulder Creek before delivering water to Barker Reservoir. The mine currently manages <br /> discharges directly into Coon Track Creek below Pond 2 under Colorado Department of Public Health and <br /> Environment (CDPHE) Water Quality Control Division (WQCD) National Pollutant Discharge Elimination <br /> System NPDES)Permit CO-0032751,as shown on Figure 1 and Map 4. <br /> 1 <br />