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Dowe Flats Quarry Soils and Geology Report <br /> Average summer temperature: 20 to 26 degrees C. (68 to 78 degrees F.) <br /> Elevation is 1,006 to 1,981 meters (3,300 to 6,500 feet) <br /> Frost free season: 125 to 170 days. <br /> GEOGRAPHICALLY ASSOCIATED SOILS: These are the Penrose, Tyrone, and Wilid <br /> series, and the competing Minnequa series. Penrose soils have a lithic contact at depths of less <br /> than 50 centimeters and are on scarps. Tyrone soils have a natric horizon. Wilid soils have an <br /> argillic horizon and are on interfluves. <br /> DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: <br /> Drainage: Well drained <br /> Saturated Hydraulic Conductivity: high or moderately high. <br /> USE AND VEGETATION: They are used as rangeland, nonirrigated and irrigated cropland. <br /> Native vegetation is mainly blue grama, galleta, western wheatgrass, cactus, and needlegrass. <br /> DISTRIBUTION AND EXTENT: Southern and central Colorado, parts of Kansas, Nebraska <br /> and South Dakota, LRR G, MLRA 69, 72, 60A and 64. The series is extensive. <br /> MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado <br /> SERIES ESTABLISHED: Arkansas Valley Area, Colorado, 1926. <br /> REMARKS: Diagnostic horizons and features in this pedons are: <br /> Particle size control section: 25 to 100 centimeters (10 to 40 inches). (Bkl, Bk2, and part of the <br /> Bk3 horizons) <br /> Ochric epipedon: the zone from 0 to 18 centimeters (0 to 7 inches). (A horizon) <br /> Calcic horizon: 18 to 64 centimeters (7 to 25 inches) <br /> Other features: calcium carbonate equivalent: 15 to 40 percent <br /> Moisture regime: aridic bordering on ustic. <br /> The assignment of the cation-exchange activity class is inferred from lab data from similar soils <br /> in the surrounding area. <br /> LAN 12/2012 The previous classification of calcareous Ustic Torriorthents became obsolete with <br /> the Eleventh Edition to Keys to Soil Taxonomy. Based on a field project this update moves the <br /> type location from Las Animas County, Colorado to Pueblo County, Colorado and changes the <br /> Taxonomic class to Fine-silty, mixed, superactive, mesic Ustic Haplocalcids. <br /> Taxonomic Version: Eleventh Edition, 2010. <br /> National Cooperative Soil Survey <br /> U.S.A. <br /> 12 May 2, 2022 <br />