2012-03-23_REVISION - M1981185 - Laserfiche WebLink

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Mr. Czapla Page 2 to protect areas outside of the affected land from slides and other damage. Generally, grading activities will occur in the following sequence: • Install erosion and sediment control BMP's as required by current Federal and State standards. • Strip topsoil and vegetation from hill side and slope areas. The topsoil will be stockpiled on -site and used at the end of reclamation activities. • Remove existing structures as indicated on Figure C7.10 of the New Access Road construction drawings. • Grade the affected area to meet the contours shown on Figure C7.10. Heavy equipment will be necessary to move the estimated 2,200 cubic yards of material that can be moved from cut areas to fill areas. The New Access Road will require approximately 4,900 cubic yards of imported soil from a borrow pit. All material will placed in a manner that complies with the Rule 6.5 Geotechnical Stability Report, prepared by J. Erich Rauber and David McLay and dated April 2, 2012. • After grading is complete, place between 6 and 12 inches of topsoil over the disturbed areas. After reclamation grading has been completed, the disturbed areas will be planted with seed summarized in the approved mine permit and steep slopes will be protected with erosion control blankets to prevent erosion while the vegetation is establishing. TOPSOIL AND SOIL AMENDMENTS Generally speaking, topsoil in the vicinity of the New Access Road has been found to be less than six inches thick. Due to this, it is recommended that the stripping and stockpiling of topsoil be limited in scope to only areas that are found to have at least six inches, or more, of topsoil. Topsoil removal will be further complicated by the steep slopes along portions of the New Access Road. If suitable topsoil is found in quantities of six inches or more, this topsoil will be stripped and stored on the Base of Operations site. If this topsoil is not replaced within a time short enough to prevent deterioration of the topsoil (due to weather or other unforeseen conditions), a vegetative cover will be employed so the topsoil is preserved from wind and water erosion and is usable for reclamation and revegetation activities. For revegetation purposes, it is recommended that at least six inches of topsoil be placed over all disturbed areas. If necessary, the Contractor should import the topsoil from a nearby borrow area. When placing the topsoil, the surface should be roughened to provide micro - catchments to trap seeds and precipitation for seedling protection from sun and wind. No soil amendments are anticipated as part of the reclamation of the New Access Road. If after two seasons of revegetation growth the seed mix is not establishing as anticipated, nitrogen fertilizers can be used to promote growth.