The Harbor series consists of very deep, moderately well drained soils on low beach ridges, offshore bars and deltas on Wisconsinan age lake plains. These soils formed in sandy glaciolacustrine sediments and the underlying till.
Permeability is moderately rapid in the sandy mantle and slow in the underlying material.
Slope ranges from 0 to 12 percent. The mean annual temperature is about 51 degrees F., and the mean annual precipitation is about 34 inches. The thickness of the solum ranges from 30 to 65 inches. The depth to the till derived material is 20 to 40 inches. Rock fragments range from 0 to 15 percent in the A and Bw horizons, from 0 to 35 percent in the Bt horizon, and from 2 to 35 percent in the 2BC and 2C horizons.