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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
405808074583001 410349 Blairstown 1 Obs
Valley and Ridge aquifers
Martinsburg Shale
Martinsburg Shale
LOCATION - Lat 40°58'08", long 74°58'30" referenced to North American Datum of 1927, Blairstown Township, Warren County, NJ, Hydrologic Unit 02040105, in the Limestone Ridge and Marsh Preserve, Cedar Lake Rd.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 294 ft. Upper casing diameter 6 in; top of first opening 41 ft, bottom of last opening 294 ft. Drilled observation well.
DATUM - Land-surface datum is 460 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of shelf, 3.0 ft above land-surface datum, Jul. 13, 1999 to present; Top of aluminum ring on casing, 1.55 ft above land-surface datum, Jun. 29, 2018 to present.
PERIOD OF RECORD - July 1999 to current year.
GAGE - Water-level recorder.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 2.41 ft below land surface datum, Apr 8, 2022; lowest, 6.09 ft below land surface datum, Aug 7, 1999.
