--395342075102101 PHILADELPHIA COUNTY, local
well number PH12
--Lat 39`53'42", long
75`10'21", Hydrologic Unit 02040202, at Barracks and East
Fourth Streets, Philadelphia.
--U.S. Naval Base.
--Middle Sand Unit of Potomac-Raritan-Magothy
aquifer system of Late Cretaceous age.
--Drilled observation artesian
well, diameter 8 in., depth 101 ft, cased to 93 ft, screened from
--Data collection platform with
60-minute recording interval. Satellite telemetry at station.
--Elevation of land surface is 8.6 ft above sea
level. Measuring point: Top of casing, 1.8 ft above land-surface datum;
3.3 ft above land-surface datum since May 27, 1998.
--Daily maximum, minimum, and mean water
levels since October 1994 are available from the District Office. Mean
daily fluctuation caused by tidal loading, 0.20 ft.
PERIOD OF RECORD.
--January 1952 to current year.
--Funding for the operation of this
station is provided by the Pennsylvania Department of Environmental
Protection and the U.S. Geological Survey.