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North Notth of the site are the railroad ROW on the west side, an Excel Energy substation in the <br />north central area and a ranch on the northwest side. <br />East Three small residences, one ranch and an industrial park on the southeast side border the per- <br />mit area. <br />3. MINING PLAN <br />The general plan is to sequentially mine Ateas 1 through 5 and leave a combination of lakes and <br />flat land areas for industrial/commercial use after reclamation. Mining Areas 1, 2 and 3 are on the <br />lower bench or terrace while Mining areas 4 and 5 are located on the second terrace above the river <br />and have approximately 15 feet more overburden to remove before reaching the gravel. The gravel <br />zone is approximately 20 feet thick. Prior to mining, the 0.67 acre low area will be marked with <br />flags and 4 large signs will be posted with the language "Avoid Wetland" as shown on Map C-2. A <br />15 feet buffer from the edge of the low area to the start of excavation will be employed. This area <br />has been demonstrated to be non-jurisdictional, however, it will nevertheless be avoided. <br />Prior to mining, a sediment pond wilt be utilized on the low point (southwest part of the permit <br />area), as shown on Map C-2. The pond will be approximately 0.7 acres in size and will be exca- <br />vated to a depth of 5.0 feet. Using an average depth of 3.9 feet, the storage capacity of the pond is <br />2.73 acre feet. The topsoil from the excavation will be stored in the south stockpile as shown on <br />Map C-2. Topsoil from Mining Area 1 will also be stripped and stored in the same stockpile. Since <br />salvageable topsoil in this mining area is approximately 1.0 feet, and Area 1 is 29.78 acres in size, <br />the total acreage is 30.48 acres and the total volume is 49,170 cubic yards. The sideslopes of the <br />pile will be 2H:1V, 1860' long, 76 feet wide which will hold the 49,170 cy excavated. It will be <br />seeded immediately after it is created with a dryland seed mix meant for the low rainfall that this <br />site receives. The mix will consist of Inland Saltgrass and Alkali Sacaton. The sediment pond will <br />have a gated steel discharge structure of 8" diameter that can be easily shut to keep the water in the <br />pond if necessary. This I S' high berm will also serve top provide visual protection to all traffic on <br />Interstate 70. While this work is being done, the portable facilities will be brought in to the staging <br />15 Road Pit 10/02 7 <br />