Major streams flow through the plain, which is divided into two parts by a band of steep ice-contact ridges. Outwash deposits of sand and gravel cover more than half of the sub-subsection. More than 80 percent of the outwash is in the 0 to 6 percent slope class. Slopes on the moraines are generally in the 0 to 6 percent or 6 to 12 percent slope classes. Ground moraine is concentrated in the southeast portion of the sub-subsection, where numerous low drumlin ridges are oriented from northeast to southwest.
Lakes are common on the outwash plain.
These lakes occupy ice-block kettles or abandoned channels. Many of the small streams originate within wetlands on the outwash plain. About 80 percent of the outwash sands are well or moderately well drained sands and loamy sands. Very poorly drained soils are common in the narrow outwash channels between drumlins and in ice-block kettles or abandoned stream channels. Peat accumulations can be 6 to 10 feet thick.