2017-04-28_REVISION - M1977094 - Laserfiche WebLink

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C) RPM, Inc. to vertical ratio. Or the applicant may revise the reclamation plan to reclaim the site to both a rangeland and wildlife habitat post mine land use. If the latter option is chosen the applicant must address the next adequacy review item. Response: We will not leave any highwalls. All reclaimed slopes will be reclaimed to 3H:1 V or less. The post mining land use will be rangeland only. We have added a note to the Reclamation Plan Map that all final reclaimed slopes will be 3H:1V, or less. In addition, pages 33, 34 and 37 have been revised to clarify the final reclaimed slopes will be reclaimed to rangeland and no highwalls will be left. In addition we have reviewed the application for other references to wildlife habitat and highwalls, and have not found any other pages which should be revised. New pages 33, 34 and 37 are attached to this document. 4. Rule 3.1.5(3) states that if not eliminated, highwalls will be stabilized. If hallwalls will remain on site, the Division will require that a Geotechnical Stability Exhibit be submitted to demonstrate that the highwalls will be stable. The applicant PM either revise the reclamation plan text to indicate that all mine slopes will be graded andlor baclilled to a 3:1 horizontal to vertical ratio or provide an appropriate Geotechnical Stability Exhibit per Rule 6.5(2). Response: As stated above, we have modified the Reclamation Plan Map and the application narrative to remove the reference to leaving highwalls and that all reclaimed slopes will be 311:1 V or less. 5. In section 3.1.9, the operator provides a brief description of how the growth media will remain in place for the mine areas that fall within the Sa soils unit. Portions of the Phase 1, 2, 3, 4 and 6 mining areas fall within the CbC (Colby Loam) and ShD (Stoneham loam) series that have soil horizons that are appropriate to salvage. No description of the depth oftopsoil to be salvaged is provided for these areas. Please describe the depth ofpsoil to be removed and salvaged for reclamation for the mining areas that fall within the CbC and ShD soil unit. Response: Page 37, section 3.1.9, (1) has been changed to read as follows: "Soils unit CbC is a loam/silt soil up to 24" deep. Soil unit ShD is a loam soil up to 9" deep. Section 3.1.9(3) describes the amount of topsoil to be salvaged. If topsoil stockpiles will not be disturbed for at least two years, they will be seeded with the approved topsoil pile seed mix, rye grass." A new page 37 is attached to this document. RPM, Inc., 22151 E. Euclid PI., Aurora, CO 80016 Phone: (303) 854-7499 Email: hlhumphries2Ca comcast.net