2007-09-11_REVISION - M1997054 (2)

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Material will be shipped primarily by rail with local deliveries by truck. A railroad currently loops through the gravel plant azea and the operator plans a rail spur to the granite quarry. Both aze to be connected to the Union Pacific Railroad. The rail road will be relocated in approximately 5 years to remove the rail loop for mining activities and lay a track along the northern boundary of the sand and gravel mine (see Exhibit C-2). The truck traffic will be limited to 24 trucks/day or 85% of the material produced. The traffic plan remains unchanged from the existing approved permit. GRANITE QUARRY MINING PLAN The proposed mining plan for the granite quarry was developed by Lyman Henn, Inc. Beginning next year, a processing facility containing approximately 4 acres will be setup in the southwest comer of the granite quarry disturbance limit. A stormwater pond will be established north of the processing facility, outside the proposed limit of mining. Prior to mining, a processing plant platform will be constructed by placing fill in the drainage azea immediately west of the mining limit from elevation 5790 ft to elevation 5820 ft. Side slopes will generally be at an inclination of approximately 3H:1V. This will provide a processing area that is above the floodplain. Appropriate permitting will be obtained from Fremont County. Three ephemeral drainages exist within the mining limits and have been designated 1, 2, and 3 from west to east as shown on the existing conditions map. The mining phases have been laid out using the drainages as natural limits. Each drainage will not be disturbed until the next mining phase is implemented. Drainage 1 will be filled in to provide a flat platform for the processing area, as previously discussed. A stonnwater pond and 4-ft culvert will convey the existing drainage flow to Tallahassee Creek. Mining Phases II, III and IV will require pumping of collected water from drainages 2 and 3. During mining activities, check dams will be used to control the storm drainage and settle sediment prior to pumping. Mine Phasing Mining and reclamation will proceed in four phases beginning from the northwest and moving in a clockwise manner to the southeast. The process azea will be located in the western area of the mining limits and encompass approximately 4 acres. The mining phases will be employed to: 1) Develop the quarry in a manner that will disturb only limited areas at a time; 2) Facilitate concurrent reclamation of mined slopes in inactive areas in a Timely manner; and 3) Accommodate operational flexibility and other considerations. The configurations described for all phases aze the most aggressive configurations which are likely to be practical from a geotechnical perspective. Less aggressive configurations are possible as more field information is gathered. Operational considerations, rock quality, slope stability, and visual impacts will all influence the actual final build-out for any phase, which may be less extensive than the geometries shown. The anticipated production rate for the granite is 1 million ton per year at the beginning of mining and a peak rate of 2.8 million tons per year by approximately year 10. Front Range Aggregates, LLC- Parkdale Quarry DMG 112 Permit Amendment Page !3