PROVISIONAL DATA SUBJECT TO REVISION
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Site Information
LOCATION.--Lat 41°18'02", long
73°59'30" referenced to North American Datum of 1927,
Rockland County, NY, Hydrologic Unit 02030101, in Bear Mountain
State Park near Lemon Road and Seven Lakes Drive.
WELL CHARACTERISTICS.--Depth 60 ft. Upper casing diameter 6 in; top of first opening 33 ft, bottom of last opening 57 ft. Cased to 53 ft, open hole.
DATUM.--Land-surface datum is 381.74 ft above North American Vertical Datum of 1988. Measuring point: Top of extended casing, 3.64 ft above land-surface datum, Aug. 23, 2017 to present.
PERIOD OF RECORD.--July 1949 to September 1990, November 1991 to September 1993, March 2002 to current year.
REVISIONS HISTORY.--2016: Datum of gage.
GAGE.--Water-stage recorder--15 minute; periodic manual measurements by USGS personnel. Prior to Apr. 29, 2002, non-recording gage usually read weekly by observer.
REMARKS.--Satellite water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level, 4.70 ft below land-surface datum, Mar. 11, 2011; lowest water level, 33.02 ft below land-surface datum, Feb. 6, 1981.
WELL CHARACTERISTICS.--Depth 60 ft. Upper casing diameter 6 in; top of first opening 33 ft, bottom of last opening 57 ft. Cased to 53 ft, open hole.
DATUM.--Land-surface datum is 381.74 ft above North American Vertical Datum of 1988. Measuring point: Top of extended casing, 3.64 ft above land-surface datum, Aug. 23, 2017 to present.
PERIOD OF RECORD.--July 1949 to September 1990, November 1991 to September 1993, March 2002 to current year.
REVISIONS HISTORY.--2016: Datum of gage.
GAGE.--Water-stage recorder--15 minute; periodic manual measurements by USGS personnel. Prior to Apr. 29, 2002, non-recording gage usually read weekly by observer.
REMARKS.--Satellite water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level, 4.70 ft below land-surface datum, Mar. 11, 2011; lowest water level, 33.02 ft below land-surface datum, Feb. 6, 1981.
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