2.2.2 Geology and Soils

The depth to bedrock within the subwatershed varies from 200 to 400 feet.  Quaternary deposits - the surficial material overlaying the bedrock - are high relief New Ulm loamy till, with pockets of peaty muck.  Soils within the watershed are predominantly classified as Natural Resources Conservation Service Hydrologic Soil Group B (loamy soils with moderate infiltration potential) and D (clayey soils with very low infiltration potential) (see Figure 3).  The Group D soils are found in low-lying areas and are generally hydric, or showing indications of inundation (see Figure 4).