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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
393611075375601 Dc43-38
Northern Atlantic Coastal Plain aquifer system
Columbia Group
Columbia Group
LOCATION - Lat 39°36'11.27", long 75°37'56.32" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205,
REVISIONS HISTORY - WDR-US-2011: 2009, 2010.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 10 ft. Upper casing diameter 2 in; top of first opening 8.8 ft, bottom of last opening 9.8 ft. Driven, observation well.
DATUM - Land-surface datum is 0.35 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of PVC casing, 4.31 ft above land-surface datum, Mar. 17, 2010 to present.
PERIOD OF RECORD - May 2008 to current year.
GAGE - Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15 minute recording interval, June 2009 to February 2013 (discontinued).
REMARKS - Well SCD-EM-2D, eastern marsh drivepoint; USGS - Potomac Aquifer Study at Standard Chlorine, Delaware City. Missing data due to instrument removal during water quality sampling.
EXTREMES FOR PERIOD OF RECORD - Highest water-level measured, 4.40 ft above sea level, October 30, 2012 (recorder); lowest measured, 1.98 ft above sea level, March 29, 2010 (recorder).
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 10 ft. Upper casing diameter 2 in; top of first opening 8.8 ft, bottom of last opening 9.8 ft. Driven, observation well.
DATUM - Land-surface datum is 0.35 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of PVC casing, 4.31 ft above land-surface datum, Mar. 17, 2010 to present.
PERIOD OF RECORD - Intermittent water-quality data collected June 2008 to current year.
