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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 2025
404934074400501 271190 Black River 10 Obs NJ Permit Number 25336789
Piedmont and Blue Ridge crystalline-rock aquifers
Precambrian Erathem
Precambrian Erathem
LOCATION - Lat 40°49'04", long 74°40'53" referenced to North American Datum of 1927, Chester Township, Morris County, NJ, Hydrologic Unit 02030105, at the Black River Wildlife Management Area, Pleasant Hill Rd.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 200 ft. Upper casing diameter 6 in; top of first opening 87 ft, bottom of last opening 200 ft. Drilled observation well.
DATUM - Land-surface datum is 890 ft above National Geodetic Vertical Datum of 1929. Measuring point: TOP OF CASING, 1.61 ft above land-surface datum, Oct. 5, 1989 to Apr. 2, 1991; Top of casing, 1.8 ft above land-surface datum, Jul. 23, 2002 to present.
PERIOD OF RECORD - April 1991 to current year.
GAGE - Water level recorder with telemetry.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 1.09 ft above land surface datum, Sep 8-9, 2011; lowest, 17.31 ft below land surface datum, Jan 23, 2017.
