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Bureau of Land Managemetit Appendices <br /> Royal Gorge Field Office DOI-BLM-CO-F020-2020-0036 EA <br /> Sediment transport and erosion will be <br /> controlled from the newly affected areas by use <br /> of topsoil salvage, surface drainage control <br /> structures, and timely revegetation efforts. <br /> Stormwater drainage controls will be with <br /> earthen berms, drainage ditches along roads, <br /> sediment ponds,earthen diversion berms above <br /> highwalls, straw wattles, silt fences. Earthen <br /> berms are for runoff diversion,not catchment; <br /> they are all shown on the map. They will be 2 to <br /> 3 feet high with 2:1 side slopes. The existing <br /> sediment pond will continue to be used,though <br /> its dam height may be raised if needed. <br /> Roadside ditches will be 1 to 2 ft deep. <br /> Collected road ditch runoff will be conveyed to <br /> sediment pond via rolling dips on the roads <br /> and/or approximately 16" diameter culverts. <br /> Specifics of Stormwater Management Plan <br /> (SWMP)will be finalized following BLM <br /> authorization. Ref. Figure 4 in the EA for <br /> location of drainageways and stormwater <br /> structures. <br /> k. Documented The outfall from the existing pit is adjacent to <br /> outfalls (point the access road, at the sediment pond. The same Y N N _ <br /> source discharge to outfall location and pond will be used for the <br /> surface watersplanned pit expansion. <br /> The operator will continue to use a locked gate <br /> with signage at the entrance. A limited amount <br /> 1. Safety of fencing along the perimeter of the operation N N N <br /> controls may be used. All earthmoving and processing <br /> equipment,power-generation equipment, and <br /> fuel and materials storage will be locked when <br /> A-7 <br />