PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 40°33'37.2", long
74°09'34.8" referenced to North American Datum of
1983, Richmond County, NY, Hydrologic Unit 02030104, at
southwest corner of East Gurley Avenue and Brookfield Avenue,
westernmost well, Great Kills, Staten Island.
WELL CHARACTERISTICS.--Depth 60.5 ft. Upper casing diameter 4 in; top of first opening 55.5 ft, bottom of last opening 60.5 ft.
DATUM.--Land-surface datum is 24 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.09 ft below land-surface datum, 23.91 ft above land-surface datum, Feb. 3, 2005 to Sep. 18, 2024; Top of casing, 0.09 ft below land-surface datum, 22.68 ft above land-surface datum, Sep. 18, 2024 to present.
PERIOD OF RECORD.--February 2005 to current year.
GAGE.--Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 13.16 ft above NGVD of 1929, Sept. 30, 2011; lowest measured, 9.51 ft above NGVD of 1929, Mar. 1, 2007, Mar. 19, 2009.
WELL CHARACTERISTICS.--Depth 60.5 ft. Upper casing diameter 4 in; top of first opening 55.5 ft, bottom of last opening 60.5 ft.
DATUM.--Land-surface datum is 24 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.09 ft below land-surface datum, 23.91 ft above land-surface datum, Feb. 3, 2005 to Sep. 18, 2024; Top of casing, 0.09 ft below land-surface datum, 22.68 ft above land-surface datum, Sep. 18, 2024 to present.
PERIOD OF RECORD.--February 2005 to current year.
GAGE.--Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 13.16 ft above NGVD of 1929, Sept. 30, 2011; lowest measured, 9.51 ft above NGVD of 1929, Mar. 1, 2007, Mar. 19, 2009.
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