|MD-DE-DC Water Science Center|
U.S. GEOLOGICAL SURVEY
Open-File Report 2002-447
This report presents a map showing the change in the potentiometric surface of the Upper Patapsco aquifer in the Upper Patapsco Formation of Cretaceous age in Southern Maryland for September 1990 and September 2001. The map, based on water level measurements in 35 wells, shows that during the 11-year period, the potentiometric surface ranged from an increase of 3 feet at Arnold, which is located just north of Annapolis, to a decline of 24 feet 5 miles south of LaPlata and 20 feet at both Waldorf and LaPlata.
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View the full report in PDF (96 KB)
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For more information about USGS activities in Maryland, Delaware and the District of Columbia contact:
MD-DE-DC Water Science Center
U.S. Geological Survey
8987 Yellow Brick Road
Baltimore, MD 21237
Telephone: (410) 238-4200
Fax: (410) 238-4210
or access the USGS Water Resources of Maryland, Delaware, and District of Columbia home page at: http://md.water.usgs.gov/.