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Response to ORMSS Adequacy Review ('otter JD-8 Mine Reclamation Plan Amendment <br /> Revised Exhibit D <br /> Mining Plan <br /> JD-8 Mine Permit Amendment <br /> Response to Adequacy Review <br /> M-1984-014 <br /> The mining method that has been used and is planned for future efforts at the JD-8 Mine <br /> is random room and pillar mining following development to areas of ore potential. Ore <br /> production has ranged from 50 to 250 tons per day. No changes to the production rates <br /> are anticipated. Waste material produced as a result of the production and development <br /> activities has ranged from 50 to 350 tons per day. It is anticipated that these rates will <br /> continue, although as stopes become mined out, as much waste material as possible will <br /> be gobbed in the mined out stopes. <br /> Mining of the ore is generally accomplished by 'split-shooting' the ore and the associated <br /> waste material. During the 'split-shooting' effort the drill round is completely drilled, the <br /> drillholes are probed to determine where the break between ore and waste material is, <br /> then the waste material is blasted and removed. Once the waste material is removed, the <br /> ore material is blasted and removed to the ore stockpile area. <br /> Water diversions and impoundments will be covered in the attached Environmental <br /> Protection Plan. <br /> The surface area where the mine waste is currently being stored is approximately I I acres <br /> on the Doagy No. 2 and Opera Box claims. This area will continue to be used for mine <br /> waste storage, topsoil storage, a temporary ore storage pad, and a shop/dry facility. The <br /> proposed affected acreage on the JD-8 lease tract has not had any impacts from the <br /> current mining operation. As a result of a re-design of the lower mine waste dump it is <br /> anticipated that the proposed affected area on top of Monogram Mesa for the mine waste <br /> dump and ore storage pad will not be required,but future exploration drilling may locate <br /> sufficient resources to require the use of the upper mine waste area and ore storage pad. <br /> The Environmental Protection Plan(EPP) that is being submitted as part of this <br /> Amendment is being prepared for the affected surface area on the Doagy No. 2 and Opera <br /> Box claims, the proposed vent hole locations on the JD-8 lease tract, and the associated <br /> underground mine workings. If the upper mine waste area and ore storage pad is required <br /> in the future an amendment with corresponding EPP will be prepared for this area prior to <br /> any disturbance. <br /> During construction of the upper portion of the lower mine waste dump the waste <br /> material will be stacked in approximately ten-foot lifts, with six feet benches between the <br /> crest of the lower lift and the toe of the upper lift. This will reduce the amount of <br /> material that will need to be moved during the re-contouring process to achieve the final <br /> 2H:1 V desired slope after mining is completed. <br /> Considering that the JD-8 property has not been fully explored. and that economic factors <br /> may affect the quantity of material mined from the underground workings the timetables <br /> for the various phases are very rough estimates. The use of the lower mine waste area is <br /> Page A 12 <br />