2.2.2 Geology and Soils

The depth to bedrock within the subwatershed varies from 300 to 400 feet. Quaternary deposits - the surficial material overlaying the bedrock - are high relief New Ulm loamy till, with areas of clayey silt in the south and pockets of peaty muck in low lying areas. Soils within the watershed are predominantly Natural Resources Conservation Service Hydrologic Soil Group B (loamy soils with moderate infiltration potential) (see Figure 3). Group D (clayey soils with very low infiltration potential) soils are found in low-lying areas and are generally hydric, or showing indications of inundation (see Figure 4).