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Sedimentation may occur in the temporary ponding areas. These <br />ponds can readily be cleaned out by on-site equipment. <br /> <br />Erosion of finished slopes is minimized by backfilling to a minimum <br />slope of 4:1 and seeding and mulching. The berm will be constructed <br />to a minimum of 3:1 slopes and seeded and mulched. <br /> <br />Dust will be controlled by paving 221 st Ave. from the exit to Highway <br />169. The main entrance and exit roads to the plant area will also be <br />paved. Conveyors will be used within the site minimizing truck traffic <br />on internal haul roads. <br /> <br />Access control will be established by locking gates at the site entrance <br />and exit. The entire site will be fenced. <br /> <br />10.) Restoration Plan <br /> <br />Restoration will be an ongoing process. As an area of mining is <br />completed, and mining advances to a subsequent phase, reclamation <br />will begin on the completed phase. Reclamation activities at the site <br />will consist of backfilling, grading, and seeding. Work will be <br />concentrated on the sideslopes around the perimeter of the site. The <br />base of the site may remain open to accommodate mining activities, <br />various haul roads, stockpile areas, etc. Final grades will range from <br />1% to 25%. Final restoration grades are shown on the Reclamation <br />Plan, Sheet 2 of 2. <br /> <br />Topsoil shall be placed on graded areas to be reclaimed. The area shall <br />be seeded within 6 months of completing the backfilling. Topsoil will <br />come from on-site sources, and be placed in a layer that is a minimum <br />of 3" thick in accordance with the city ordinance. <br /> <br />After placement of topsoil is complete, it shall be seeded and mulched <br />according to Minnesota Department of Transportation (MnDOT) <br />Standard Specification No 3876 and 3882. The seed used shall be <br />MnDOT seed mixture 50A. The mulch shall be Type I. It should be <br />recognized that portions of a given phase, for example, along borders <br />of subsequent phases, within the processing and operations area and <br />along haul roads, may be left at an intermediate stage of reclamation <br />until completion is practical. <br /> <br />9 <br /> <br /> <br />