2022-02-03_REVISION - C1981018 (2)

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HArologic Soil Group and Surface Runoff---Rio Blanco County Area Colorado 1 Right Discharge Shcs Hydrologic Soil Group and Surface Runoff This table gives estimates of various toll water features The estimates are used in land use planning that involves engineering considerations Hyckdogso soil groups are teased on estimates of runoff potential Soils are assigned to one of four groups according to the rate of water infiltration when the sails are not protected by vegetation;are thoroughly wet and receive precipitation from long-duration Storms. The four hydrologic soil groups are: Group A Soils having a high infiltration rate(low runoff potential)when thoroughly wet These consist main ty of deep,well drained to excessively drained sands or gravelly sands.These soils have a high rate of water transmission Group B. Soils having a moderate infiltration rate when thoroughly wet These consist chiefly of moderately deep or deep. moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture These soils have a moderate rate of water transmission. Group C.Soils having a slow infiltration rate when thoroughly wet These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture These soils have a slow rate of water transmission. Group D.Soils having a very slow infiltration rate(high runoff potential)when thoroughly wet These consist chefly of clays that have a high shrink-swell potential.soils that have a high water tape,soils that have a claypan or clay layer at or near the surface:and soils that are shaltow over nearly impervious material These soils have a very slow rate of water transmission If a soil is assigned to a dual hydrologic group(AID, BID,or CIO) the first letter is for drained areas and the second is for undrained areas Surface runoff refers to the loss of water from an area by flow over the land surface. Surface runoff classes are based on slope,climate;and vegetative cover The concept indicates relative runoff for very specific conditions It is assumed that the surface of the soil is bare and that the retention of surface water resulting from irregularities in the ground surface is rranimal.The classes are negligible,very low,low.medium,high.and very high. Report—Hydrologic Soil Group and Surface Runoff Absence of an entry indicates that the data were not estimated.The dash indicates no documented presence Hydrologic Sell Group and Surface Runoff-Rio Blanco County Are;Colorado Map syntlal and soil name Pct.of map unit Surface Runpfr g Hydrolopte So®Group J J —Moyerson stony day loam.15 to 65 percent sIOF-es 90 Veryhtgh D - . Natural Resources — Web Soil Survey 12113r2021 Conservation Service National Cooperative Soil Survey Pape 1 of Blue Mountain Energy 12 Illustration 61