2011-04-29_PERMIT FILE - M2011001 (20)

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f C Soil amendments are not expected to be required due to the nature of the soils. However, topsoil samples will be subjected to agricultural testing prior to reclamation to assess fertilizer requirements. The Soil Conservation Services (SCS) will be contacted periodically throughout reclamation for soil tests. SCS soil fertilizer recommendations, if any, will be followed. Reclamation Measures - Material Handling Site reclamation measures are illustrated on Exhibit F. The Iverson property will be reclaimed as an open water pond surrounded by upland. The pond will be an un-sealed groundwater pond. All mine walls will be re-graded with overburden material. If needed, portions of the deposit not mined may be used to supplement the overburden. Slopes both above and below the post-mine high water level will all be 3H:1 V or flatter. Topsoil will be spread over the surface of the re-graded slopes in all areas above the post-mining pond level; all topsoil-covered surfaces will be revegetated with the appropriate seed mix. Topsoil replaced in upland areas will be at a depth of at least six inches. Scrapers and a dozer will be used to place the backfilled overburden and topsoil. Using the scrapers and dozer to layer the lifts at a maximum 3H:1 V slope ensures a stable configuration. Site grading will be performed to create stable topography and will be consistent with post-closure land uses. Reclamation costs and quantities are summarized in Exhibit L. Water Overburden and mine materials will be inert and impacts to local surface water or groundwater quality are not anticipated to occur as a result of mining activities. Lafarge West, Inc. will comply with all applicable Colorado water laws and all applicable Federal and State water quality laws and regulations and appropriate storm water management and erosion control to protect the river and existing riparian vegetation. Wildlife The Iverson property is adjacent to the Cache la Poudre River corridor which provides wildlife habitat to a variety of species (see Exhibit H for details). All mining will be setback at least 100' from the bank of the river to be outside of the riparian corridor to minimize any potential impacts on wildlife within the riparian corridor. Revegetation Following topsoil replacement, reseeding will be performed according to SCS recommended practices. Based on SCS guidance for other local projects having similar surficial soils, the following revegetation procedures are anticipated: • Grass seed will typically be planted in unfrozen soil between October 1 and April 30. • Grass seed will be planted with a grass drill, or where necessary, with a broadcast seeder. • The proposed seed mix and application rates in pounds of pure live seed per acre are described on the following pages. • Weed control practices will be implemented as required. Iverson Mine DRMS 112 Reclamation Permit Application Page E2 of E4