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CA <br /> P.O. Box 1887.702 Gregg Drive•Buena Vista CO 81211 <br /> "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 31-1:1 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 /> Seeding: 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 />