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2001 Soil Sampling: Seneca Mine, Hayden Colorado • Nitrous Nitrogen Potassium Zinc Iron Manganese Copper Sodium Adsorption Ratio Organic Matter pH Electrical conductivity Percent Saturation Vegetation- Vegetation was observed qualitatively for. vigor, color, growth form, and overall vegetative appearance both above and below ground. Above ground plants were observed for ground cover density, basal area, growth form vigor, color and height. Below ground plant roots were observed for vigor;. abundance, size, distribution, and depth of penetration. A genera! site photo was taken at each sample location along with a photo of the vegetation taken vertically from a height of 7 feet with a'/. meter square frame laid on the ground as a comparative background. • Results Results for the Seneca II and Seneca II-W follow: Seneca II 10 sites were sampled in the southern and western portions of the mine area. Field descriptions are located in Appendix IV and lab data is located in Appendix 11. Topsoil- Topsoil in all sample pits classifies as suitable topsoil (Appendix III, Table- 2). The results follow: Depth- The average depth of topsoil is 11.5 inches (.9 feet). Depth of topsoil ranges 10 to 20 inches (.8 to 1.6 feet). The topsoil in both sample pits consisted of two horizons. The upper horizon averages 5 inches of thickness and ranges in depth from 0 to 5 inches in thickness. The lower topsoil horizon averages 6.5 inches in thickness and ranges from 5 to 11 inches in thickness. The difference in horizons is due to structure and dry and moist consistence as the result of disking. All other characteristics between horizons are the same. Textures- Textures are loams, clay loams and clay. Clay content averages • 25 percent and ranges 14 to 34 percent, sand content averages 34 percent and ranges 26 to 39 percent. Silt content averages 41 percent and ranges 36 to 45 percent. Page 5 of 10 11 /09/01