LOCATION.--Lat 40°30'40.2", long
74°14'48.9" referenced to North American Datum of
1983, Richmond County, NY, Hydrologic Unit 02030104, at
southwest corner of Johnson Avenue and Craig Avenue,
northernmost well, Tottenville, Staten Island.
WELL CHARACTERISTICS.--Depth 10 ft. Upper casing
diameter 2 in; top of first opening 5 ft, bottom of last
opening 10 ft.
DATUM.--Land-surface datum is 59 ft above National
Geodetic Vertical Datum of 1929. Measuring point: Top of
casing, 0.23 ft below land-surface datum, 58.77 ft above
land-surface datum, Jul. 23, 2004 to present.
PERIOD OF RECORD.--July 2004 to current year.
GAGE.--Water level recorder November 2005 to August
2013. Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
recorded, 53.99 ft above NGVD of 1929, Aug. 29, 2011; lowest
measured, 50.94 ft above NGVD of 1929, Apr. 16, 2015.