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❑Boulder ❑Fort Collins ❑Winter Park ®Glenwood Springs ❑Denver <br /> 1319 Spruce Street 213 Linden Street PO Box 1860 817 Colorado Avenue 1512 Larimer Street <br /> Boulder,CO 80302 Suite 200 47 Cooper Creek Way Suite 301 Suite 710 <br /> 303.444.1951 Fort Collins,CO 80524 Suite 328 Glenwood Springs,CO Denver,CO 80202 <br /> 970.225.9099 Winter Park,CO 80482 81601 303.444.1951 <br /> 970.722.7677 970.404.3100 <br /> www.jvajva.com <br /> M E M O <br /> TO: District Board DATE: August 24,2021 <br /> FIRM: Leadville Sanitation District JOB NO. 1119.2e <br /> ADDRESS: 911 US-24 PROJECT: Union Milling Permit M1990-057(Version 4) <br /> Leadville,CO 80461 SUBJECT: Objections <br /> Dear District Board, <br /> JVA has reviewed the CJK Milling Company Leadville Mill (Mill) Permit M1990-057 dated March 2021 and developed a <br /> list of objections based on potential impacts and detrimental effects to the Leadville Sanitation District's(District) <br /> Wastewater Treatment Facility(WWTF)and sanitary sewer collection system.The Mill is located directly west of the <br /> District's WWTF and was constructed in 1989 and operated through 2000 as a stand-alone facility.The District's <br /> sanitary sewer collection system runs through the northern part of the property. <br /> In review of the Mill permit,JVA understands the Mill will be reconfigured to use conventional agitated leaching, <br /> using sodium cyanide from low-grade vein dumps(RoM) located nearby.The Mill will truck in ore and process it <br /> onsite in a new crusher building.Three ore stockpiles,one topsoil stockpile and one Tailings Storage Facility(TSF) <br /> overburden stockpile will be constructed onsite. No mining operations onsite are planned and no explosives will be <br /> used.The new crushing building which will house the trommel/crusher will operate 8 hours per day.This operation <br /> and potential seismic activity represent a potential risk of damage and/or failure of the District's sewer collection <br /> system that runs through the property as well as multiple concrete structures located at the WWTF. <br /> The District collects and treats wastewater from downtown Leadville as well as developments located west of <br /> Leadville.Wastewater flows by gravity through the collection system to the WWTF. Figure 1 below shows the <br /> District's existing sanitary sewer line that could be directly impacted by the new crushing facility. <br />