USGS Water-Year Summary 2021
Northern Atlantic Coastal Plain aquifer system
LOCATION - Lat 39°19'32.9", long 75°43'49.8" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02060002,
WELL CHARACTERISTICS - Depth 22 ft. Upper casing diameter .17 in; top of first opening 14 ft, bottom of last opening 20 ft.
DATUM - Land-surface datum is 67 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.76 ft above land-surface datum, Dec. 1, 2016 to present.
PERIOD OF RECORD - December 2016 to current year
GAGE - Water-level measurements by U.S. Geological Survey personnel. Equipped with digital water-level recorder from December 2016 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 2.66 ft below land surface, February 11, 2018; lowest measured, 9.17 ft below land surface, October 20, 2019.