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"ASPHALT, CONCRETE, & AGGREGATES' Phone: (719) 395-3790 Fax: (719) 395-3794 <br />Reclamation & Vegetation Plan: <br />The following plan has been developed with Alex Tonnesen of Western Native Seed, who is a <br />revegetation specialist experienced in restoration ecology and local native plant communities. <br />Temporary Revegetation: <br />The top 6-12" of native topsoil will be stripped and stockpiled before mining operations begin. <br />All stripped topsoil will be relocated to the outer 100' of Pit boundaries for storage. Topsoil stockpiles <br />will be shaped into berms and seeded with the recommended seed mix (Temporary Seed Mix listed <br />below) to minimize and prevent erosion and reduce weeds. <br />All berm slopes will be established with a maximum steepness of 3H:1 V final grade. Native <br />topsoil will cover at least the top 6-12" of the berms. Once finish grade has been established, tilling of <br />chiseling will occur to loosen the soil surface. Drill seeding will be used to apply the seed. After seeding, <br />soil conditioning may be used, such as straw mulch. <br />Previous revegetation efforts using the Dryland Pasture Seed Mix from Arkansas Valley Seed <br />(see Figure 1) have resulted in stands of primarily Hycrest Crested Wheatgrass with minimal amounts of <br />Lincoln Smooth Brome and Pubescent Wheatgrass. While the Crested Wheatgrass is effective at soil <br />stabilization and weed reduction, it is a cool season grass and the addition of Blue Grama which is a <br />warm season grass would provide a more balanced vegetative cover. Therefore, I would recommend the <br />following mix for reseeding the berms: <br />Temporary Seed Mix <br />75% Crested Wheatgrass, variety Hycrest <br />25% Blue Grama, variety Alma, Bad River or a local ecotype <br />A more diverse mix is not necessarily needed since existing topsoil used in creating the berms <br />and will contain a seed bank as well as roots and rhizomes that will, over time, contribute to the <br />revegetation and provide increased species diversity. <br />Seediniz: The seed mix is to be planted between April and July to take advantage of spring <br />or summer moisture. The mix is to be seeded at 15 lbs./acre drill seeding. If a seed drill cannot be used, <br />then the mix should be seeded at 25 lbs. per acre broadcast seeding or 35 lbs./acre hydroseeding. The <br />seed should be planted no more than '/4 inch deep. A seed drill with different seed boxes especially one <br />for fluffy seed is recommended so that the Blue Grama is properly planted. <br />Irrigation: Irrigation is not necessary for establishment; however it does shorten the <br />establishment period, and may be needed if plantings fail. The grasses can be established within a <br />growing season with proper irrigation. Without irrigation establishment should take 3 years with normal <br />ACA Products, Inc • 702 Gregg Drive; PO Box 1887 • Buena Vista, CO 81211 <br />Phone 719-395-3790 • Fax 719-395-3794 <br />