Maryland Department of Natural Resources


Geohydrologic data for the Coastal Plain sediments underlying Broadneck Peninsula, Anne Arundel County, Maryland

1991, Mack, F.K. and Andreasen, D.C.

Open File Report 92-02-6


Testing at two sites on Broadneck Peninsula in Anne Arundel County, Maryland, provided information about the full thickness of the Coastal Plain sediments and the availability and quality of water from major water-bearing sands.

Total thickness of the Coasta Plain sediments at the Sandy Point site is 1,793 feet. Four aquifers, the Patuxent, lower Pacapsco, upper Patapsco, and Magothy, were tested by pumping at Sandy Point. Transmissivity values determined for some of the sands in these aquifers, 950 feet squared per day (ft2/d), 88 ft2/d, 5,500 ft2/d, and 1,200 ft2/d, respectively, may be a small percentage of the tota transmissivity of the aquifers because of the short screens in each well. Total iron concentrations in water from these sands were 6,600 micrograms per liter (ug/L), 15,000 ug/L, 32,000 ug/L, and 26,000 ug/L, respectively. Water levels, after recovering from testing in 1978, were 9, 8, 0.3, and 1 feet above mean sea level, respectively.

Total thickness of the Coastal Plain sediments at the Arnold water treatment plant is 1,578 feet. Three aquifers, the Patuxent, lower Patapsco, and upper Patapsco, were tested by pumping. Transmissivity values determined for these sands were 1,400 ft2/d, 6,000 ft2/d , and 4,800 ft2/d, respectively. Total iron concentrations were 8,100 ug/L, 8,200 ug/L, and 9,900 ug/L, respectively. Water levels, after recovering from testing in 1988, were 6, 2, and -17 ft related to mean sea level, respectively.

Downloads and Data

Open-File Report 92-02-6 (pdf, 16.2 MB)