The Lower Patuxent watershed encompasses over 209,276 acres (327 square miles) of land.
Approximately 47% of the land in the watershed is in Calvert County, Maryland, 30% in St.
Mary’s County, Maryland, 14% in Charles County, Maryland, and 1% in Anne Arundel County,
Maryland. This survey focuses only on the area lying within Calvert County. The Maryland
Department of Natural Resources and Calvert County has formed a partnership to develop a
Watershed Restoration Action Strategy (WRAS) for the Lower Patuxent Watershed. As part of
the WRAS development process, a Stream Corridor Assessment (SCA) survey was performed on
the sub-watersheds: Hall Creek, Island Creek, and Back & Mill Creeks. The survey began in
March 2003 and was completed by October 2003.
The SCA survey was developed by the Watershed Assessment and Targeting Division of
the Maryland Department of Natural Resources to provide a rapid examination of the stream
network in a watershed. The survey is done using specially trained field teams that walked the
entire stream network and note the location of a variety of potential environmental problems. As
part of the survey, field teams also collected some basic information about stream habitat
conditions at regular intervals. This survey is not intended to be a detailed scientific evaluation,
and the data collected about any specific problem is limited. Instead, the survey is designed to
give an overview of the condition of the stream system so that future restoration efforts can be
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Updated on April 27, 2003