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<br />The Soil Conservation Service office ha~; soil survey data for <br />Larimer County. Huch of these data are mapped with .soil symbols. <br />Ho.....'ever, these symbols can be converted into the proper soil series <br />names by using the data on file at the SCS office. Once the soil <br />series is known, the soil can be cJ.assified :_nto r:he proper hydrologic <br />soil group, using Table 4,'f.1. 3-1. <br /> <br />To estimate curve number, use Tables 4.1,.1.3,-2 and 4.4.1.3-3, which <br />show the hydrologic soil group, by land use or cover type, and the runoff <br />curve number for each soil'-cover complex. <br /> <br />Table 4.4.1. 3-.1 <br /> <br />Hydrologic Classification and Soi ~ <br />Series Names for Colorado Soils <br />(From: U. S. Dept. of Agriculture, <br />Soil Conservation Service, 1977) <br /> <br />Hydrologic Soil Groups, according to th~ir infiltration and transmission <br />rates: <br /> <br />A--(Low runoff potential). Soils having high infiltration rates even <br />when thoroughly wetted; consist chiefly 0:[ deep, well to excessively <br />drained sands or gravel; have high rate of water transrni,ssion in <br />that water readily passes through them. <br />B--Soils having moderate infiltration rates '.hen thoroughly wetted; <br />consist chiefly of moderately fine to mod,erately coarse textures; <br />have moderate rate of water transmission. <br />C--Soils having slow infiltration rates when thoroughly wetted; con- <br />sist chiefly of soils with a layer that i:npedes downward movement <br />of water, or soils with moderately fine t'o fine texture; have slow <br />rate of water transmission. <br />D--(High runoff potential). Soils having very slow infiltration rates <br />when thoroughly wetted; consist chiefly of clay soils with a high <br />swelling potential; soils with .. permanent high water table; soils <br />with a claypan or clay layer at or near s'Jrface; shallow soils over <br />nearly impervious material; have very slo'. rate of ,,'ater transmission. <br /> <br /> Soil Soil Soil <br />Soil Series Group Soil Series Gro~ Soil Series Group <br /> ----- <br />Aaberg D Acasco D Agneston B <br />Abor C Acree C Aguafria C <br />Absarokee C Adel B Alamosa C/B <br />Absher C Adena C Albinas B <br />Absted D Adilis B AIda ~ C <br />Acacia B Agner C AlIens Park B <br /> <br />LCS-WM !1anual <br /> <br />4.4---.2 <br /> <br />AprH 1979 <br />