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United States Soil • <br /> sfi Department of Conservation <br /> Agriculture Service <br /> 356 kanney Street <br /> Craig, Colorado 81625 <br /> May 12, 1980 <br /> Mr. Larry Zimmerman <br /> Craig, <br /> Colorado 81625 <br /> Dear Mr. Zimmerman: <br /> The following recommendations on reclamation of your mining area are Bade <br /> at your request. To assiat you in successful revegetatlon_cf the mined area the <br /> following guidelines should be helpful. <br /> 1. During mining operations 10 to 12 inches of top soil should be stock piled <br /> for later use in revegetative measures. <br /> 2. After mining the aree Should be shaped and graded with subsoil material. <br /> Slopes should not be steeper than 3:1. Slopes of 6:1 or flatter are more <br /> destreable. In general, the chances for vegetation establishment increase as <br /> percent slope decreases. After shaping and grading have been completed apply thr <br /> available topsoil 1/ to the area. The site should be tilled to a depth of <br /> approximately 6 inches. Tillage will permit the topsoil to bind with the oubsoi <br /> materiel, prevent airpockets, encourage root penetration and prevent topsoil all <br /> on slopes. If the topsoil is placed on the area during the summer and seeding <br /> will not be done until fall the site should be kept free from weeds. <br /> 3. Fertilize immediately prior to seeding with 40-60 pounds available N and <br /> 40-60 pounds available P205. Apply the fertilizer during seedbed preparation <br /> before packing it. The fertilizer should be incorporated into the soil to a der <br /> of 2 to 4 inches. <br /> 4. A wesd free, firm but riot compacted seedbed should be prepared before seedii <br /> A cultipacker or similar equipment c?n he used to firm up the seedbed. The soi <br /> should be firm enough that when a man walks on it the heel of his shoe will onl <br /> sink into the soil an inch or so. <br /> 5. Drill the grass-legume mixture 1/2 to 1 inch deep in the prepared seedbed. <br /> Planting should be made with a drill capable of @coding both large and small a <br /> in separate compartments. Care should he taken to see that the seed is plantr <br /> at the proper depth. Drill across the slope. <br /> 0 <br />