USGS Water-Year Summary 2024
401157075032001 BK 1020
Early Mesozoic basin aquifers
Stockton Formation
LOCATION - Lat 40°11'56.9", long 75°03'01.2" referenced to North American Datum of 1983, Bucks County, PA, Hydrologic Unit 02040202, at Naval Air Development Center in Warminster Township.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 395 ft. Upper casing diameter 10 in; top of first opening 57 ft, bottom of last opening 395 ft. Drilled observation well, cased to 57 ft, open hole.
DATUM - Land-surface datum is 366 ft above North American Vertical Datum of 1988. Measuring point: top of metal shelf; MODIFIED DATE FOR AQ MIGRATION; 09/ /1975, 1.93 ft above land-surface datum, Apr. 13, 1968 to present. Elevation of land surface is from Lidar.
PERIOD OF RECORD - September 1975 to current year.
GAGE - Data collection platform with 15-minute recording interval since April 2023; prior, 60-minute recording interval. Satellite telemetry at station.
COOPERATION - Site maintained in cooperation with the Pennsylvania Department of Environmental Protection and the U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD - Prior to October 2000, the extremes were based on extremes of the daily maximum depth below land-surface datum. Since that date, the extremes are based on the instantaneous depth below land-surface datum. Highest water level, 22.17 ft below land-surface datum, Sep 10, 2011; lowest, 42.60 ft below land-surface datum, Jan 22, 23, 2002.