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Hydrologic Sol Group and Surface Runo`f---Rio Blanco Cowity/lieu Caorado 1 RigN Discnarge Soils Hydrologic Soil Group and Surface Runoff This table gives estimates of vanous Soil water features The estimates are used in land use plann>itag that involves efgneehng considerations Hydrologu;soil gfu' Ws are based on estimates of runoff potential Soils are assigned to one of four groups according to the rate of water intiftration when the soils are not protected by vegetation,are thoroughly wet.and receive precipitation from long-duraticrrf storms The four hydrologic soil groups are. Group A Soils thaving a high infilttrabon rate(low runoff potential)when thoroughly wet.These consist mairty of deep,well drained to excessivety drained sands of 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 O Soils having a very slow infiltration rate(high runoff potential)when thoroughly wet These consist chiefly of clays that have a high shrink-swell potential.soils that have a high water table,soils that have a ctaypan or day layer at or near the surface.and soils that are shallow over nearly impervious material These soils have a very sow rate of water transmission. If a soil is assigned to a dual hydrologic group(AID,8/0,or C/O).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 sot!is bare and that the retention of surface water resulting from irregularities in the ground surface is minimal.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 Soil Group and Surface Runoff-Rio Blanco County Ama,Colorado Map symbol and soil name Pct.of map unit Surface Ruoff Hyd'ollo&SoN CR*W I 53—Moyerson stony clay loam.15 to 65 percent slams Meson _ 90 Very high D I,;,\ Natural Resources Web Soil Survey 12r13J2021 Conservation Service Nalioml Cooperative Soil Survey Page 1 of 2 Blue Mountain Energy 12 Illustration 61