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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.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
393603075375901 Dc42-50
Northern Atlantic Coastal Plain aquifer system
Columbia Group
Columbia Group
LOCATION - Lat 39°36'08.63", long 75°37'56.49" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205,
REVISIONS HISTORY - WDR-US-2010: 2009.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 33 ft. Upper casing diameter 2 in; top of first opening 28 ft, bottom of last opening 33 ft. Drilled, observation well.
DATUM - Land-surface datum is 15.61 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of inner casing, 1.86 ft above land-surface datum, Jun. 28, 2009 to present.
PERIOD OF RECORD - September 2009 to current year.
GAGE - Water Years 2014-2016: Records good.
Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15 minute recording interval, October 2009 to December 2016.
Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15 minute recording interval, October 2009 to December 2016.
REMARKS - Well CW-11; 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, 6.79 ft above sea level, May 2, 2014; lowest measured, 5.16 ft above sea level, October 14, 15, 2009, November 24, 25, 26, 2013, and December 5, 6, 2014 (recorder).
