Soil Map Unit Description from the RI Soil Survey Report
UAB—Udipsamments, undulating (Coastal Dunes and Back barriers).
This unit consists of sand dunes and depressional or level, sandy areas that
have been stabilized by vegetation. The areas are along beaches, are long and
narrow, and mostly range from 5 to 75 acres. The areas of this unit that are
subject to foot and vehicular traffic have less than 10 percent of the surface
covered by vegetation, but in undisturbed areas vegetation covers about 65
percent of the surface.
Included with this unit in mapping are areas, up to 10 acres in size, of Beaches
and Matunuck mucky peat. Included areas make up about 2 percent of this map
The permeability of this soil is very rapid. Available water capacity is very
low, and runoff is very slow.
Most areas of this soil are used for summer recreation activities or for
community development purposes such as summer cottages and parking lots.
The soil is not suited to trees or most other uses. The major limitations are
droughtiness and position on the landscape. Capability subclass and woodland
group not assigned.
UPDATE: The Coastal Zone of Rhode Island is currently being updated
and re-mapped, for more information on this update visit: