Slope ranges from 0 to 3 percent. The soils formed in recent alluvial deposits of very fine sand and silt. Mean annual precipitation ranges from 40 to 50 inches and mean annual air temperature from 45 degrees to 52 degrees F. Mean annual growing season ranges from 120 to 200 days. Winooski soils are the moderately well drained member of a drainage sequence which includes the well drained Hadley soils, the poorly drained Limerick soils and the very poorly drained Saco soils. Moderately well drained.
Permeability is moderate or moderately rapid.
Flooding frequency varies from twice a year to once in 10 years. Stream overflow generally occurs during late winter or spring and during periods of high rainfall. Native vegetation is forest composed mainly of red maple, silver maple, elm, willow, northern hardwoods, and white pine. Balsam fir and spruce are in the northerly range of the series. The series is of moderate extent.