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Assessment of hydrologic and hydrogeologic data at Camp Lejeune Marine Corps Base, North Carolina

Water-Resources Investigations Report 89-4096
By D.A. Harned, O.B. Lloyd, Jr., and M.W. Treece, Jr.

Abstract

The U.S. Geological Survey, in cooperation with the U.S. Marine Corps, is studying the groundwater resources of the Marine Corps Base at Camp Lejeune, North Carolina, and is constructing a groundwater flow model of the area. Water use by the Base increased from about 4 million gal/day in 1941 to about 7 million gal/day in 1986. In the last decade, water demand has not increased substantially. The Castle Hayne aquifer is the source of water for the Base. The aquifer, which lies between 50 and 300 ft below the Base, is composed of a series of sand and limestone beds. Contour maps of water levels show that the New River is a major discharge area for the Castle Hayne, as is the Atlantic Ocean. The top of the aquifer ranges from about 20 ft above sea level in the northern part of the area to about 40 ft below sea level in the southeastern part. Thin and discontinuous clay beds, less than 30 ft thick, compose about 15% to 24% of the section, indicating that the aquifer is in a leaky, confined aquifer system. Well-acceptance tests indicate a mean specific capacity of 8.8 gal/min/ft of drawdown. The mean transmissivity value estimated from specific capacities is 9,900 sq ft/day. The mean estimated hydraulic conductivity is 48 ft/day.

Harned, D.A., Lloyd, O.B., Jr., and Treece, M.W., Jr., 1989, Assessment of hydrologic and hydrogeologic data at Camp Lejeune Marine Corps Base, North Carolina: U.S. Geological Survey Water-Resources Investigations Report 89-4096, 64 p.