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depth of soils for topsoil materials. <br />This report presents field and laboratory methodology used in the study as well as: <br />• A soil map delineating soil mapping units <br />• Map unit descriptions <br />• Taxonomic unit descriptions <br />• Chemical and physical data <br />• Recommended topsoil salvage depths for each soil series and soil mapping unit <br />• Prime farmland assessment <br />General Nature of the Area <br />• The New Horizon Mine soil study area is located within the Colorado Plateau Physiographic Province, <br />Canyon Land Section, in southwest Colorado. It is within USDA Major Land Resource Area 35, Colorado <br />and Green Rivers Plateau (USDA-SCS, 1978). Average elevation is about 5,700 feet. <br />Climate <br />The New Horizon Mine soil study area is located in an "ustic-aridic"soil moisture regime and a "mesic"soil <br />temperature regime (Hawn, 1987). <br />The mean annual precipitation ranges from 10 to 14 inches. Were R notforthe presence of irrigation water <br />throughout most of the study area, the soils would have soil moisture deficits during the growing season <br />as a result of the quantify and distribution of precipitation. Periods of peak precipitation occur in the spring <br />and early summer months. <br />Mean annual air temperature is about 46 to 48 degrees F. The average frost-free period is about 130 <br />days. Additional climatological data is contained in Section 2.04.8 of this permit application. <br />. (aevrsEO z/oo) 2.04.9-2 <br />