PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 40°41'24.6", long
73°39'47.2" referenced to North American Datum of
1983, Nassau County, NY, Hydrologic Unit 02030202, at west side
of Euclid Avenue, 30 ft south of Hawthorne Street, West
Hempstead.
WELL CHARACTERISTICS.--Depth 55 ft. Upper casing diameter 2 in; top of first opening 45 ft, bottom of last opening 50 ft. Datum of gage is NGVD of 1929.
DATUM.--Land-surface datum is 49.45 ft above North American Vertical Datum of 1988. Measuring point: Last leveled with DGPS on 06-23-2015, 50.08 ft above land-surface datum, Oct. 2, 2002 to Mar. 22, 2016; unknown, 50.14 ft above land-surface datum, Mar. 22, 2016 to Feb. 8, 2019; Top of 2 inch PVC casing, north edge, 50.1 ft above land-surface datum, Feb. 8, 2019 to Oct. 23, 2023; Top of 2 inch PVC casing, north edge, 50.15 ft above land-surface datum, Oct. 23, 2023 to Aug. 8, 2024; Top of 2 inch PVC casing, north edge, 49.03 ft above land-surface datum, Aug. 8, 2024 to present.
PERIOD OF RECORD.--October 2002 to current year.
GAGE.--Water-level recorder installed October 2002 to September 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS.--Replaced well N 1129. 2 in October 2002 near same location. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded, 30.96 ft above NAVD of 1988, July 23, 2019; lowest recorded, 22.38 ft above NAVD of 1988, Nov. 6, 2002.
WELL CHARACTERISTICS.--Depth 55 ft. Upper casing diameter 2 in; top of first opening 45 ft, bottom of last opening 50 ft. Datum of gage is NGVD of 1929.
DATUM.--Land-surface datum is 49.45 ft above North American Vertical Datum of 1988. Measuring point: Last leveled with DGPS on 06-23-2015, 50.08 ft above land-surface datum, Oct. 2, 2002 to Mar. 22, 2016; unknown, 50.14 ft above land-surface datum, Mar. 22, 2016 to Feb. 8, 2019; Top of 2 inch PVC casing, north edge, 50.1 ft above land-surface datum, Feb. 8, 2019 to Oct. 23, 2023; Top of 2 inch PVC casing, north edge, 50.15 ft above land-surface datum, Oct. 23, 2023 to Aug. 8, 2024; Top of 2 inch PVC casing, north edge, 49.03 ft above land-surface datum, Aug. 8, 2024 to present.
PERIOD OF RECORD.--October 2002 to current year.
GAGE.--Water-level recorder installed October 2002 to September 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS.--Replaced well N 1129. 2 in October 2002 near same location. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level recorded, 30.96 ft above NAVD of 1988, July 23, 2019; lowest recorded, 22.38 ft above NAVD of 1988, Nov. 6, 2002.
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