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4. Grading will consist of reducing the berms on the west and south side of the existing <br />open water area. Overburden will be used in the open water to construct a shelf at or <br />just below the water surface. Slopes of the shelf will be at approximately 80:1 and <br />irregularly contoured and compacted in preparation of topsoil (Figure 8). <br />5. Grading from the current water surface out to the uplands in all directions, will be no <br />less than 10:1. <br />6. The remaining water surface area of the pond will be approximately 1 acre. <br />7. Upon completion of final grading all surfaces, upland and wetland, will receive at least <br />8 inches of topsoil. <br />8. Approximately 10,000 cubic yards of top soil will be mixed with at least 3,000 cubic <br />yards of organic material (cow manure). <br />9. A minimum of eight inches of amended topsoil, borrowed on-site, will be placed over <br />all areas disturbed during construction. Seeding will be limited to those areas that <br />have been disturbed. <br />10. Topsoil will not be placed while frozen or muddy conditions exist. <br />11. Topsoil will be compacted to the appropriate tilth, density, consistency, and friability <br />to provide a suitable growth medium for sprouting and seedling survival. Compaction <br />methods, including equipment to be utilized, will be supervised by WWE. <br />12. All areas will be graded to drain. The maximum slope steepness will be 10H:1 V <br />unless otherwise shown on the project drawings or approved in writing by the project <br />engineer. Wetland shelves will terminate 1 foot below the water surface and be cut to <br />ata 3:1 slope. <br />13. The final surface of the topsoil will be graded to a relatively smooth surface using <br />mechanical or hand raked methods. <br />14. Mineral amendments prescribed by CSU Soil Laboratory will be applied in <br />preparation of planting. <br />15. The seedbed will be prepared by contour cultivating 4 -to 6 -inches deep with a harrow <br />or disc. All other areas that have been disturbed or compacted by equipment will be <br />scarified to receive seed. <br />16. No excess material has been estimated, any additional material will be brought in from <br />existing stockpile locations in the neighboring gravel pit. <br />D. Planting Plan <br />1. Once the site has been constructed to final grade, planting zones will be established <br />and flagged. Planting zones were determined in relation to the low water table <br />elevation, measured in October 2010, is 6,171.5. Zones will allow for some overlap of <br />seed mixes (Figure 6). <br />2. Zone 1 will consist of wetlands within the existing waterline boundary, elevation <br />6,169 ft mean sea level (msl) to 6,172 ft msl. <br />WestWater Engineering Page 13 of 24 July 2012 <br />