Open-File Report 2009-1082
This report presents a map showing the potentiometric surface of the Magothy aquifer in the Magothy Formation of Late Cretaceous age in Southern Maryland during September 2007. The map is based on water-level measurements in 69 wells. The highest measured water level was 85 feet above sea level near the northern boundary and outcrop area of the aquifer in the north-central part of Anne Arundel County.
The potentiometric surface declined towards the south. Local gradients were directed toward the center of a cone of depression in the Waldorf area that developed in response to pumping. Measured ground-water levels were as low as 90 feet below sea level in the Waldorf area.
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Curtin, S.E., Andreasen, D.C., and Staley, A.W., 2009, Potentiometric surface of the Magothy aquifer in Southern Maryland, September 2007: U.S. Geological Survey Open-File Report 2009–1082, 1 map sheet.