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Stormwater Management Plan <br /> SITE SOIL,VEGETATION AND GENERAL DRAINAGE AND INFORMATION <br /> Soils <br /> The aggregate sites soils' beneath and adjacent to the site, as described USDA-Salida,Colorado District <br /> office,were formed on glacial outwash sedimentary rock.. Leadville soil is very deep and well drained. <br /> If formed in glacial outwash. Typically,the surface layer consisted of dark grayish brown sandy loam Iin <br /> thick. The subsurface layer is pink stony sandy loam Tin thick. The subsoil is extremely stony clay loam <br /> 32in thick. The substratum is extremely stony loam to a depth of 60in or more. The soil is medium <br /> acidic to a depth of 8in and slightly acidic and neutral below that depth. Permeability is moderately slow, <br /> and available water capacity is moderate. Surface runoff from the exposed soil is medium to very rapid, <br /> and the hazard of erosion of unprotected soil by water is moderate to extremely high. <br /> Areas that have been historically cleared(roads,benches) show particularly good re-growth without <br /> fertilizer or other amendments.Native soil is generally less than 6in thick. According to the Lake <br /> County Soil Survey, Leadville sandy loam (LeE)is the only soil type that exists within the property's <br /> drainage area. <br /> Vegetation <br /> Small areas have limited vegetation consisting of grasses.(See SWMP-Figure 2) <br /> Drainage <br /> There are no defined drainage channels, or rills within the CJK Aggregate's working area. If sheet wash <br /> runoff occurs, water will flow into California Gulch. (Appendix 1 -Site Drainage Report.) <br /> SITE ACTIVITIES <br /> • Leadville Aggregate will operate 6 days a week(weather permitting)excluding major holidays. <br /> • Winter road maintenance will include plowing,or storing,snow. ECMs such as rock berms, and <br /> drains will be installed to control snow/stormwater runoff to mitigate offsite sedimentation <br /> impacts. <br /> • Maintenance will immediately commence following haul road upgrades. <br /> See Appendix 1 A-Drainage Report <br /> CJK SPECIALITY AGGREGATES <br /> CIK Milling Company,LLC <br /> Leadville,Colorado <br /> Page 6 of 32 <br />