LOCATION.--Lat 43°03'27.4", long 73°47'51.1" referenced to North American Datum of 1983, Saratoga County, NY, Hydrologic Unit 02020003, at Saratoga Springs.
WELL CHARACTERISTICS.--Depth 290 ft. Upper casing diameter 6 in; top of first opening 190 ft, bottom of last opening 270 ft. Cased to 189 ft, open hole. Elevation of land-surface datum is 306.31 ft above NGVD of 1929 and 305.75 ft above NAVD 1988.
DATUM.--Land-surface datum is 305.75 ft above North American Vertical Datum of 1988. Measuring point: Top of casing, 2.31 ft above land-surface datum, Jun. 1, 1978 to Apr. 26, 2016; Top of shelter shelf, 2.56 ft above land-surface datum, Apr. 27, 2016 to Nov. 4, 2018; Top of shelter shelf, 2.37 ft above land-surface datum, Nov. 5, 2018 to present.  
PERIOD OF RECORD.--May 1949 to November 1961, August 1964 to August 1995, October 2006 to current year.
GAGE.--Water-stage recorder--15 minute; periodic manual measurements by USGS personnel.
REMARKS.--Water level affected by earthquakes and apparent pumping. In Oct. 2006, it was determined the well casing had been settling from Nov. 16, 1973, through Aug. 1995. A .01 ft to 1.02 ft correction was prorated for that period to correct the water-level data. This prorated correction should be applied to the previously published record. Satellite water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Highest water level, 38.04 ft below land-surface datum, Dec. 25, 2020; lowest water level, 56.20 ft below land-surface datum, July 29, 1949.

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