1991-10-07_PERMIT FILE - M1991123 (5)

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The U.S. Army Corps of Engineers has identified wetlands areas on the site. These areas are shown on Exhibit C. These areas will be mined at a 3: 1 slope and will not be filled following mining, therefore, there is no need for a 404 permit. The sequence of mining activities to be done is as follows: 1 ) A dewatering ditch will be constructed around the perimeter of the mining phase. 2 ) A portable dewatering pump will be installed and groundwater will be discharged to Idaho Creek. 3 ) Topsoil and overburden will be stripped and stockpiled. 4 ) Sand and gravel will be extracted and transported to the plant site for processing. 5 ) Processed material will be stockpiled at the plant site and trucked from the property to end users. Disturbance associated with mining is classified as follows: Major Disturbance Mining 6.0 acres Topsoil Stockpiles 1.0 acres Overburden Stockpiles 4.0 acres Stripped prior to Mining 3.0 acres Moderate Disturbance Plant Site 1.0 acres Access Road 0.5 acres Product Stockpiles 5.0 acres Shoreline Grading 1 .5 acres Minor Disturbance Reclaimed and Seeded 2.0 acres Reseeding Year 2 0.5 acres TOTAL DISTURBED ACREAGE 24.5 ACRES The mining plan calls for completion in approximately 10 years. Mining and reclamation of each phase will be done concurrently. When mining is completed in one phase and moves to the next phase, reclamation activities will begin immediately on the completed phase. Grading and backsloping of shorelines will be done using concurrently stripped material or stockpiled topsoil and overburden. Reseeding will be done in early spring or late fall depending on the progress of regrading. Provisions have been made to return the following year and reseed areas where previous reclamation was not successful. The estimated time between completion of a mining phase and accomplishing final reclamation is two years. D-2