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• • <br />Water Bar <br />Percent Grade Spacing in Feet <br />1 -6 300 <br />7 -9 200 <br />10 -14 150 <br />15 -20 90 <br />21-40 50 <br />Over 41 25 <br />When roads are no longer required, their surfacing materials will be salvaged to the extent <br />practicable, and recycled within the project area, if possible. Culverts that are no longer needed for <br />drainage will be removed. Retired roads will be re- graded, roughened by ripping, topdressed with <br />topsoil, and planted as described below. <br />E -5.2 RECLAMATION OF WELL FIELD <br />As shown on Figures C -1 and C -8, the pilot plant solution well field will be composed of well pads, <br />roads, and a pipe network for solution transport. Up to six well pads - each about 1 acre in area, <br />approximately 1 acre of road, and approximately 2 acres of pipeline corridor will be required to <br />operate the well field at its full six well potential. Initially, only two wells will be developed. Based <br />upon information obtained from those two wells, additional wells may be developed. This Plan <br />assumes that all six wells will be developed and that a total of about 9 acres will be disturbed in the <br />solution well field. <br />After all available nacholite has been mined from a given well (requiring one to three years of <br />solution mining) that well will be plugged and abandoned in accordance with BLM and U.S. <br />Environmental Protection Agency requirements. After well abandonment, all surface piping and <br />other facilities associated with that well will be removed. The well pad area and surface disturbance <br />associated with pipelines and roads for that well will be re- graded to near original contour, <br />roughened by ripping or plowing, topsoiled, and planted as described below. <br />When possible, topsoil salvaged from new areas to be disturbed will be applied directly to re- <br />contoured areas, reducing Tong -term topsoil stockpiling to the greatest extent possible. <br />The subsoil on the surface of re- contoured areas will be left in a roughened condition by using <br />plowing, ripping, land imprinting, or contour furrowing operations. Roughening will provide erosion <br />and sedimentation controls, microhabitats that favor vegetation establishment, and a better <br />interface for placing of topsoil over the subsoil. <br />G:LLMW 78545.002U2ec amaUonlRedamexh.DOC <br />E -7 <br />