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Permit Amendment — Cemex Sandstone Quarry COMPETING SERIES: These are the Faraway, Oro Grande, and Santana series. Faraway soils contain rock fragments mainly of gravel size and contain less than 35 percent fine sand or coarser. Oro Grande soils are calcareous throughout and have more than 18 percent clay in the control section. Santa soils have more than 18 percent clay and less than 35 percent rock fragments in the control section. GEOGRAPHIC SETTING: The Baller soils are on upland hills and ridges underlain by sandstone bedrock. Slope gradients usually range from 2 to 30 percent. The soils formed in material weathered from sandstone. At the type location the average annual precipitation is 18 inches, with peak periods of precipitation during the spring and summer. The average annual temperature is 48 degrees F, the average summer temperature is 68 degrees F. GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hargreave and Tassel soils. Hargreave soils have an argillic horizon and have bedrock below depth of 20 inches. Tassel soils have an ochric epipedon. DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderately rapid permeability above bedrock. USE AND VEGETATION: These soils are used principally as native pastureland. Principal native plants are blue grama, cactus, yucca, green needlegrass, sand dropseed, and scattered juniper. DISTRIBUTION AND EXTENT: Central portions of Colorado adjacent to the Front Range. The series is of moderate extent. MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana SERIES ESTABLISHED: Boulder Area, Colorado, 1971. REMARKS: Last updated by the state 5/75. The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated. Exhibit B B -6 March 2014