The Mudhen series consists of poorly drained soils that are deep to shale on strath terraces. These soils formed in loamy outwash and in the underlying calcareous gravel and sand.
Permeability is moderate in the solum and rapid in the substratum.
Slope ranges from 0 to 2 percent. Mean annual temperature is about 52 degrees F, and mean annual precipitation is about 37 inches. 40 degrees 27 minutes 55 seconds N. and long. 89 degrees 55 minutes 38 seconds W., NAD 27. The depth to the base of the cambic horizon ranges from 20 to 40 inches.