They are nearly level soils on flood plains.
Permeability is moderate or moderately rapid.
Slope ranges from 0 to 3 percent. Mean annual temperature is 48 degrees F. and the mean annual precipitation is about 40 inches. Hadley silt loam-cultivated. Thickness and number of subsurface horizons correspond closely to the thickness and variability of the alluvial deposits. Reaction, to a depth of 40 inches, ranges from very strongly acid through neutral, but some subhorizon in each pedon is moderately acid or less acid.