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Mine Operation Aspects and Disturbance Areas <br /> Mining Operation Disturbed <br /> Aspect Area(acres) <br /> Active Mining Area: <br /> 1. Near vertical active mining face(500 linear feet at 15-foot <br /> average depth to backfill at 3H:1V equals 0.5 acres). <br /> 2. Pre-stripped topsoil and overburden area in anticipation of <br /> A mining (500 feet by 100 feet equals 1.2 acres). 8.8 <br /> 3. Near vertical un-reclaimed pit side slopes (500 linear feet on <br /> each side of mining face at 15-foot average depth to backfill at <br /> 3H:1V equals 1.1 acres). <br /> 4. Un-reclaimed pit floor(6 acres). <br /> Material Processing Area (Asphalt, Recycling): <br /> B 1. Un-reclaimed pit floor(8 acres). 9 7 <br /> 2. Pit side slopes previously backfilled/rough graded to 3H:1V <br /> (2,300 linear feet at 10-foot average depth equals 1.7 acres) <br /> Partially Reclaimed Mining Area: <br /> 1. Pit side slopes previously backfilled and rough graded to 3H:1V <br /> C (two side slopes at 500 linear feet and 15-foot average depth 7.1 <br /> equals 1.1 acres). <br /> 2. Partially reclaimed pit floor previously rough graded(6 acres). <br /> Miscellaneous Disturbed Areas: <br /> D 1. Internal haul roads. 2 0 <br /> 2. Scale House/Office,Maintenance, and Employee Parking Area <br /> 3. Other areas disturbed by mining activities. <br /> Final Reclamation: <br /> E 1. Seeding. NA <br /> 2. Re-seeding <br /> Total Disturbed Area 27.6 <br /> Diversions and Impoundments <br /> The existing grade of the proposed permit area generally drains to the west and south of the site. <br /> The drainage swale west of the site and adjacent to the Burlington Northern Railroad ROW <br /> eventually drains to Coal Creek southwest of the site. Stormwater that falls directly on disturbed <br /> areas will generally drain to the mine pit and allowed to infiltrate. The active mine pit will <br /> effectively contain stormwater flows and prevent surface runoff from disturbed areas of the site. <br /> Stormwater not encountering disturbed areas will be allowed to drain to Coal Creek. <br /> Material Processing and Associated Facilities <br /> Excavated materials will primarily be processed on-site. Pit run material may be hauled off-site <br /> for direct use or processing elsewhere. An asphalt plant will also be established on the site. In <br /> sr Pit <br /> DRMS 112 Permit Application Page 8 <br />