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After the cessation of mining activities, the office, shops and pazking area will be used by the <br />owner of the land and thus, these structures will not be removed. MR 33 was approved to allow <br />for these structures to be permanently retained on the site. MR 39 was approved to allow 9 <br />raptor perch sites (Map 9) to be. temporarily retained to assist in hunting efficiency of raptors <br />to control rodent populations and reduce erosion due to their burrowing activity. <br />Access Roads <br />Several access roads as depicted on the Reclamation Area (Map 7) will be retained for post <br />mining uses. These include access to the office and shop buildings, access to the top of the east <br />pit fill area, and access to the south side of the Stollsteimer Creek along the west toe of the east <br />pit fill area. In addition, the truck turn around area located on the north side of Highway l51 <br />will also be retained as a livestock loading area. Approval to retain these facilities was provided <br />as Minor Revision Number 33. <br />Ponds. Impo»r~trnenra and Diversions <br />To control runoff and protect surface water quality, the Chimney Rock Mine has constructed <br />sedimentation ponds, interceptor ditches and terraces in accordance with Sxtions 4.05.2 through <br />4.05.9 of the CMI.RD regulations. Five impoundments, Ponds A~002, 11003, p004, and 11005, <br />and Sediment Trap A have been constructed to control runoff from disturbed areas of the mine. <br />The Drainage Control Map (Map 8) depicts the location of the impoundments, ditches, and <br />associated structure. All design criteria for sediment control structures are contained in Exhibit <br />• 7, Sediment Control Design Criteria. <br />Maintenance procedures will include mowing or cutting excessive vegetation growth to facilitate <br />inspections and repairs, keep ditches, culverts and spillways free of debris, acrd removing all <br />combustible material (other than mulch and other material required for erosion control and <br />surface stability). Sediment will be removed from the sedimentation ponds when the volume of <br />sediment accumulates to 60 percent of the design sediment storage vohune. A stake will be <br />driven into each pond to monitor sediment volume. The accumulated sediment will be removed <br />and placed in existing topsoil or subsoil stockpiles, if it meeu the appropriate criteria for such <br />use. <br />The sedimentation ponds and interceptor ditches will be completely removed and reclaimed upon <br />the cessation of mining operations, but not until the disturbed area served by the ponds has been <br />restored, vegetation requirements met and the quality of the nmoff entering the ponds is <br />consistent with the quality of Stollsteimer Creek, as established by baseline quality data and <br />contimring quarterly analysis. <br />The above referenced Drainage Control Map (Map 8), describes the location of all structures <br />necessary for sediment control within the permit area. Generally, ponds, spillways, interceptor <br />ditches and terraces were sized and placed according to such hydrologic factors as required <br />sediment storage vohune, rate of flow and volume of flow for the predescribed precipitation <br />event. <br />2.05-2 Rev. 3-1-94 <br />SS ~ST 46. St NtiW £Hd 0L0 3hI[]151.32i9 t36Z6TZL£0£ <br />