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Western Mining District 18-Left Shaft Site Baseline Soil Investigation <br />Wettest months: Precipitation is relatively evenly distributed throughout the year. <br />Frost-free period: 35 to 55 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cochetopa, Clayburn, and <br />Matmore (T) series. Cochetopa and Clayburn soils are well drained soils that occur on hillslopes <br />and elevated areas. Matmore soils occur on lower flood plains and are somewhat poorly drained. <br />DRAINAGE AND PERMEABILITY: Moderately well drained, high runoff, slow <br />permeability. These soils are rarely flooded for brief periods during the months of April to June. <br />USE AND VEGETATION: These soils are used for irrigated hay and pasture or are in native <br />range and are used for livestock grazing or wildlife habitat. The native plant community is basin <br />wildrye, western wheatgrass, Columbia needlegrass, and streambank wheatgrass. <br />DISTRIBUTION AND EXTENT: North central Colorado. LRR E, MLRA 48A. This series is <br />of small extent. <br />MLRA OFFICE RESPONSIBLE: Lakewood, Colorado <br />SERIES PROPOSED: Routt County, Colorado. 1997. The name comes from a creek in Routt <br />County. <br />REMARKS: Diagnostic horizons and features recognized in this pedon are: <br />Mollie epipedon: The zone from 0 to 55 inches. (A, Bw, and Bkl horizons) <br />. Cumulic feature: An irregular decrease in organic carbon inferred from the fine stratification <br />observed from 0 to 18 inches (A horizon) <br />Calcic horizon: The zone from 38 to 75 inches. (Bkl and Bk2 horizons) <br />Redoximorphic features: Masses of iron accumulation from 38 to 75 inches (Bkl and Bk2 <br />horizons). <br />Endosaturation: an observed saturated zone below 38 inches (Bkl and Bk2 horizons). <br />Keys to Soil Taxonomy: Seventh Edition, 1996. <br />ADDITIONAL DATA: The suborder would be Cumulic Oxyaquie if such a placement were <br />available in soil taxonomy. Calcium carbonate equivalent was determined at the project office <br />using the calcimeter method. <br />National Cooperative Soil Survey <br />U.S.A. <br />Habitat Management, Inc. A3-5 01/15/2009