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JD-8 Mine Environmental Protection Plan <br /> • upper affected area on the DOE JD-8 lease tract,the permitted surface area in the upper lease tract has not <br /> been affected at this time. <br /> Cotter re-designed the lower mine waste pile and Highbury anticipates that the proposed upper affected <br /> area on top of Monogram Mesa for the mine waste pile and ore storage pad will not be required at this <br /> time. However, future exploration drilling may locate sufficient resources to require the use of the upper <br /> mine waste area and ore storage pad. If the upper mine waste area and ore storage pad are required in the <br /> future,the EPP will be updated to address this area prior to any new disturbance on the lease tract. <br /> 1.2 Site History <br /> Highbury reported the acquisition of JD-8 in March 2019. Cotter acquired the JD-8 lease tract from the <br /> DOE following a successful bid in 1974.The Doagy No. 2 patented claim was acquired from Union <br /> Carbide Corporation in 1983.An easement to cross the Opera Box patented claim was acquired from <br /> Union Carbide Corporation in 1983.The Opera Box claim was later purchased from Union Carbide <br /> Corporation. Cotter applied for a mine permit in 1984. Following acquisition of the mine permit, Cotter <br /> began rehabilitation work on the Opera Box portal and adit. Since then,the Opera Box portal has been <br /> referred to as the JD-8 portal.Historical workings existed from the Opera Box and JD-8 portals prior to <br /> Cotter's acquisition of the mine permit. In addition, historical workings existed in the abandoned Black <br /> Diamond Mine, located approximately 200 feet below the JD-8 Mine. <br /> Access to the underground workings of JD-8 is provided through a 600-ft long tunnel located inside the <br /> pre-permit Opera Box Mine portal, for which Cotter secured an easement agreement with Union Carbide <br /> • in 1983. Cotter began mine development at the site in April 1986 and suspended mining shortly thereafter <br /> due to a decline in the uranium market. Cotter enlarged the original 6-ft by 7-ft adit to 10-ft by 11-ft. <br /> During active mining operations,ore and waste material were brought to the surface through the JD-8 <br /> adit,then the ore-grade material was trucked to Cotter's Mill in Canon City. Ore was stockpiled on a <br /> waste rock constructed pad just east of the portal. Waste materials were brought out and placed to the <br /> north of existing waste piles. <br /> • <br /> 7 <br />