6.4. SR 08-20-2007 - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I , site to convey material from the active face to the processing equipment and to the operations area established at Tiller's existing facility. There will be no water supply well or buildings constructed in association with this permit. No explosives will be used at the site. 10.) Drainage, Erosion Control, Sedimentation, Dust, Access Control and Security: Surface water drainage will be directed to low areas on the adjacent Tiller mining operation. Collected surface water infiltrates into the underlying soils and/or evaporates. Surface water drainage will not be directed off the Tiller site. Sedimentation may occur in the temporary ponding areas. These ponds Gan be readily cleaned out by on-site equipment. The site will operate under a Minnesota NPDES permit for gravel mining facilities and a Storm water Pollution Prevention Plan will be prepared for the site as required by the NPDES permit. Erosion of finished slopes will be minimized by backfilling to a minimum slope of 4: 1 and seeding and mulching in accordance with the Reclamation Plan. Dust control will consist of watering on-site gravel haul roads as needed. Conveyors will be used within the site, minimizing truck traffic on internal haul roads. Perimeter berms will also limit dust movement from the site. Access to the site will be controlled through Tiller's existing facility which consists of a combination of locking gate, berms, signs and fencing. Additional fencing will be installed along the south and east sides of the proposed mining operation just outside of the mining limits. 11 .) Restoration Plan Because the site is relatively small, it will be mined in one phase and restored in one phase. Reclamation activities at the site will consist of backfilling, grading, and seeding. Final grades will range from 1 % to 25 %. Final restoration grades are shown on the Reclamation Plan, Sheet C3. Page 7 of 1 0