The Wapahani series consists of moderately well drained soils that are shallow or moderately deep to dense till. They formed in Wisconsinan till on ground moraines and recessional moraines.
Permeability is moderately slow in the solum and slow or very slow in the dense till.
Slopes range from 1 to 18 percent. Wapahani clay loam on a 10 percent slope in a cultivated field. 40 degrees 07 minutes 36 seconds N. and long. 85 degrees 33 minutes 52 seconds W., NAD 27. The depth to the base of the argillic horizon is 10 to 20 inches.