LOCATION.--Lat 40°30'40.1", long
74°14'48.7" referenced to North American Datum of
1983, Richmond County, NY, Hydrologic Unit 02030104, at
southwest corner of Johnson Avenue and Craig Avenue,
southernmost well, Tottenville, Staten Island.
WELL CHARACTERISTICS.--Depth 69 ft. Upper casing
diameter 2 in; top of first opening 59 ft, bottom of last
opening 64 ft.
DATUM.--Land-surface datum is 57.98 ft above North
American Vertical Datum of 1988. Measuring point: Top of
casing, 0.18 ft below land-surface datum, 58.82 ft above
National Geodetic Vertical Datum of 1929, Jul. 23, 2004 to Sep.
16, 2024; Top of casing, 0.18 ft below land-surface datum, 57.8
ft above North American Vertical Datum of 1988, Sep. 16, 2024
to present.
PERIOD OF RECORD.--July 2004 to April 2015, June
2024 to current year.
GAGE.--Water level recorder installed November 2005 to
June 2007, October 2024 to current year. Periodic manual
measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
measured, 8.35 ft above NGVD of 1929 (7.33 ft above NAVD of
1988), Feb. 19, 2010; lowest measured, 3.72 ft above NGVD of
1929 (2.70 ft above NAVD of 1988), Jan. 14, 2025.
Daily data pages will be decommissioned in early 2026.
Daily data are now available in WDFN.
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