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• <br />• <br />• <br />promote drainage. The final surface will be contoured to minimize erosion, ponding, or slope <br />failure. Finally, the area will have a plant growth medium replaced and revegetated on those <br />areas returned to forest land. <br />Ponds one and two will be removed, including disposal of the pond liner at an off -site, approved <br />facility as requested by Boulder County. Any sediment on the liners will be sampled and <br />removed if required by regulatory requirements and disposed of in an approved facility. The <br />pond areas will be regraded, covered with a plant growth medium and revegetated in the same <br />manner as other disturbed areas at the site. Regrading will occur to provide positive drainage, <br />preventing ponding. <br />Calais will take measures appropriate to the subgrade where topsoil is being replaced. Such <br />measures may include roughing the surface in order to gain a mechanical bond between the <br />subgrade and the replaced topsoil. Where the subgrade is of acceptable quality, it may include <br />disc plowing the topsoil and subgrade together, a practice typically used by commercial <br />landscapers. <br />Calais will replace topsoil in as even a manner as equipment allows. Soil amendments will be as <br />recommended by the local NRCS. Presently, they recommend that if soil tests are not <br />preformed, forty (40) pounds per acre of each of the major nutrients (nitrogen and phosphoric <br />acid (P205)) be applied. They also recommend a combination of mulch or other organic matter <br />and a nutrient source such as well -cured feedlot or barnyard manure be applied. The <br />recommended application rate should be at least twenty (20) tons per acre, evenly spread. The <br />manure must contain at least 60% (by weight) large chunks, five inches or more in diameter. <br />(Granular or powdery manure will not meet specifications.) <br />If phosphoric acid is applied, it will be applied on the overburden prior to plant growth medium <br />replacement. This nutrient is not mobile. Placing it in the root zone prior to plant growth <br />medium replacement will ensure optimal utilization by plant roots. <br />The seedbed will be well settled and firm, but friable enough so the seed can be drilled at the <br />recommended depth. Soils having been compacted by traffic or other equipment will be tilled <br />(deep - chiseled or ripped if necessary) breaking up restrictive or compacted layers, and then <br />harrowed and rolled or packed to produce the required firm seedbed. If the seed is to be <br />broadcast seeded, then the seedbed will be settled and fairly firm, but left rough enough to catch <br />the seed and allow some coverage by soil when tracked in by equipment or harrowed and packed <br />into the soil surface. Seedbed preparation will be avoided when the soil is wet to prevent <br />seedbed compaction. Planting depth will be less than one inch. Drill row spacing will be <br />approximately 8 inches. <br />Page 33 <br />