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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.
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USGS Water-Year Summary 2025
401552074501801 210028 Civil Defense Obs NJ Permit Number 27-04214
Early Mesozoic basin aquifers
Lockatong Formation
Lockatong Formation
LOCATION - Lat 40°15'53", long 74°50'12" referenced to North American Datum of 1927, Ewing Township, Mercer County, NJ, Hydrologic Unit 02040105, at the State Police Headquarters.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 300 ft. Upper casing diameter 6 in; top of first opening 33 ft, bottom of last opening 300 ft. Drilled observation well.
DATUM - Land-surface datum is 122.99 ft above National Geodetic Vertical Datum of 1929. Measuring point: Transfer MP created for migration, 0 ft above land-surface datum, Jan. 2, 1964 to Jun. 2, 1964; Top of shelf, 2.8 ft above land-surface datum, Jun. 1, 1964 to Apr. 2, 2001; Top of base of locking cap, 0 ft above land-surface datum, Apr. 1, 2001 to present.
PERIOD OF RECORD - June 1964 to September 1976, April 1978 to current year.
GAGE - Water-level recorder.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 11.70 ft below land surface datum, Mar 1, 2021; lowest, 49.69 ft below land surface datum, Jun 17, 1964.
