USGS Water-Year Summary 2024
405743072425701 S 4271. 1
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
LOCATION - Lat 40°57'43", long 72°42'57" referenced to North American Datum of 1927, Suffolk County, NY, Hydrologic Unit 02030202, at Long Island Research Farm, east of Horton Avenue, south of Sound Avenue, Riverhead.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 105 ft. Upper casing diameter 4 in; top of first opening 100 ft, bottom of last opening 105 ft. Measuring point is 99.94 ft above NGVD of 1929, 0.36 ft below land-surface datum.
PERIOD OF RECORD - August 1945 to current year.
GAGE - Water-level recorder installed November 2006; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 15.43 ft above NGVD of 1929, June 3, 2010; lowest measured, 8.16 ft above NGVD of 1929, Sept. 5, 1966.