PROVISIONAL DATA SUBJECT TO REVISION
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Site Information
LOCATION.--Lat 40°48'32.5", long
73°33'28.9" referenced to North American Datum of
1983, Nassau County, NY, Hydrologic Unit 02030202, northwest
corner of Fruitledge Road and Cedar Swamp Road (Rt. 107).
WELL CHARACTERISTICS.--Depth 175 ft. Upper casing diameter 4 in; top of first opening 170 ft, bottom of last opening 175 ft.
DATUM.--Land-surface datum is 228 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of 4 in PVC casing, 229.88 ft above National Geodetic Vertical Datum of 1929, Oct. 31, 1974 to May. 5, 2021; Top of 4 in PVC casing, 228.68 ft above North American Vertical Datum of 1988, May. 5, 2021 to present.
PERIOD OF RECORD.--October 1974 to April 1984, March 1990 to January 2000, March 2005 to current year.
GAGE.--Water-level recorder installed June 2016; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 90.84 ft above NGVD of 1929, Dec. 5, 1979; lowest measured, 73.82 ft above NGVD of 1929, Mar. 20, 1996.
WELL CHARACTERISTICS.--Depth 175 ft. Upper casing diameter 4 in; top of first opening 170 ft, bottom of last opening 175 ft.
DATUM.--Land-surface datum is 228 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of 4 in PVC casing, 229.88 ft above National Geodetic Vertical Datum of 1929, Oct. 31, 1974 to May. 5, 2021; Top of 4 in PVC casing, 228.68 ft above North American Vertical Datum of 1988, May. 5, 2021 to present.
PERIOD OF RECORD.--October 1974 to April 1984, March 1990 to January 2000, March 2005 to current year.
GAGE.--Water-level recorder installed June 2016; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 90.84 ft above NGVD of 1929, Dec. 5, 1979; lowest measured, 73.82 ft above NGVD of 1929, Mar. 20, 1996.
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