Laserfiche WebLink
TABLE C5. SOIL TYPE AND INFILTRATION RATES. <br />Hydrologic <br />Soil Group <br />Soil Textures <br />Corresponding Unified Soil Classification <br />Infiltration <br />Rate (in/hr)' <br />GW <br />Well -graded gravels, sandy gravels <br />Gravel <br />GP <br />Gap -graded or uniform gravels, <br />Sandy Gravel <br />sandy gravels <br />1.63 <br />Silty Gravels <br />GM <br />Silty gravels, <br />A <br />silty sandy gravels <br />SW <br />Well -graded gravelly sands <br />Sand <br />Loamy Sand <br />SP <br />Gap -graded or uniform sands, <br />0.8 <br />Sandy Loam <br />gravelly sands <br />SM <br />Silty sands, <br />0.45 <br />Loam <br />silty gravelly sands <br />B <br />Silt Loam <br />MH <br />Micaceous silts, diatomaceous silts, <br />0.3 <br />volcanic ash <br />C <br />Sandy Clay Loam <br />ML <br />Silts, very fine sands, silty or clayey <br />0.2 <br />fine sands <br />GC <br />Clayey gravels, <br />clayey sandy gravels <br />SC <br />Clayey sands, <br />clayey gravelly sands <br />Clay Loam <br />CL <br />Low plasticity clays, sandy or silty <br />Silty Clay Loam <br />clays <br />D <br />Sandy Clay <br />Silty Clay <br />0.06 <br />OL <br />f l <br />Organic silts and clays of <br />Clay <br />plasticity <br />CH <br />Highly plastic clays and sandy clays <br />OH <br />Organic silts and clays of high <br />plasticity <br />Source: Adapted from the "Design infiltration rates" table from the Minnesota Stormwater <br />Manual, MPCA, (January 2014). <br />RN <br />