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| MD-DE-DC Water Science Center |
U.S. GEOLOGICAL SURVEY
Open-File Report 99-82
This report presents a map showing the potentiometric surface of the Aquia aquifer in the Aquia Formation of Paleocene age in Southern Maryland during September 1997. The map was prepared from water-level measurements in 81 wells. The potentiometric surface was above sea level near the northern boundary and outcrop area of the aquifer in topographically high areas of Anne Arundel and Prince Georges Counties, and was below sea level in the remainder of the study area. The hydraulic gradient was directed southeastward toward an extensive cone of depression around well fields at Lexington Park and Solomons Island. Ground-water levels were more than 80 feet below sea level in a 60-square mile area surrounding the deepest part of the cone of depression. The lowest measurement was 143 feet below sea level in one well near the center of the cone.
This report is available as a GIF file (Large Print Size) and in Portable Document Format (PDF)(8½ x 11 printed size).
View the OFR 99-82 report in GIF (1.8 MB)
View the OFR 99-82 report in PDF (138 KB)
This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.
Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.
For more information about USGS activities in Maryland, Delaware and the District of Columbia contact:
Director
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/.
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