2.2.2 Geology and Soils

The depth to bedrock within the subwatershed varies from 200 to 300 feet.  Quaternary deposits--the surficial material overlaying the bedrock--are high relief New Ulm loamy till, with a sandy deposit on the north end of the subwatershed.

Soils within the watershed are predominantly Natural Resources Conservation Service Hydrologic Soil Group B (loamy soils with moderate infiltration potential) (see Figure 3), with group D (clayey soils with very low infiltration potential) soils found in low-lying areas and generally hydric, or showing indications of inundation (see Figure 4).