The Bethalto soils have a thin, dark surface layer and the Edwardsville soils have a mollic epipedon. The Bethalto and Edwardsville soils form a biosequence with the Caseyville soils. The well drained Menfro soils and the moderately well drained Winfield soils are on more sloping landform positions nearby and they form a hydrosequence with the Caseyville soils. Somewhat poorly drained. Surface runoff is slow or medium.
Permeability is moderate.
In drained areas, depth to an intermittent apparent high water table is 0.5 foot to 2.0 feet from December to April in most years. Most areas are cropped to corn, soybeans, and small grain. Some areas are pastured or wooded. Native vegetation is deciduous forest. Extent is moderate, and mainly in MLRA 115.