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Burton Farms Gravel Pit: <br /> Exhibit B-2:Soil Resources Report and Map <br /> Custom Soil Resource Report <br /> Rio Grande County Area, Colorado <br /> De—Derrick cobbly loam <br /> Map Unit Setting <br /> National map unit symbol. jqwd <br /> Elevation: 7,600 to 8,200 feet <br /> Frost-free period: 90 to 105 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Derrick and similar soils: 100 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Derrick <br /> Setting <br /> Landform:Terraces, alluvial fans <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Cobbly alluvium <br /> Typical profile <br /> H1 -0 to 4 inches: cobbly loam <br /> H2-4 to 17 inches: very gravelly loam <br /> H3- 17 to 60 inches: very cobbly sand <br /> Properties and qualities <br /> Slope:0 to 3 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Drainage class:Well drained <br /> Runoff class: Low <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high <br /> (0.60 to 2.00 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum content. 15 percent <br /> Maximum salinity: Nonsaline to very slightly saline(0.0 to 2.0 mmhos/cm) <br /> Available water supply, 0 to 60 inches: Low(about 4.0 inches) <br /> Interpretive groups <br /> Land capability classification(irrigated): None specified <br /> Land capability classification(nonin'igated): 7s <br /> Hydrologic Soil Group: B <br /> Ecological site: R051 XY281 CO-Mountain Outwash <br /> Hydric soil rating: No <br /> 13 <br />