USGS Water-Year Summary 2024
400540082540400 FR-523 AT NGWA
Sand and gravel aquifers (glaciated regions)
Outwash
LOCATION - Lat 40°05'39.80", long 82°54'03.72" referenced to North American Datum of 1983, Franklin County, OH, Hydrologic Unit 05060001, Well located at NGWA Headquarters 601 Dempsey Road, Westerville, Ohio 43081-8978. North side of building, at edge of driveway.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 26.2 ft. Upper casing diameter 1.5 in; top of first opening 21 ft, bottom of last opening 26 ft. Drive point well construction, diameter 2 in., cased PVC, 5 ft prepacked screen (20-40 sand) from 21 to 26 ft.
DATUM - Land-surface datum is 840.46 ft above North American Vertical Datum of 1988. Measuring point: PVC marked inside steel casing, 3.75 ft above land-surface datum, Sep. 29, 2005 to present.
PERIOD OF RECORD - Periodic water-level measurements from September 23, 2005 to current year.
Continuous water-level data from October 6, 2005 to current year.
GAGE - Electronic data logger, 60-minute log interval. Satellite telemeter at site.
EXTREMES FOR PERIOD OF RECORD - Maximum daily low, 22.92 ft below land-surface datum, November 11, 2010; minimum daily low, 18.03 ft below land-surface datum, May 22, 2020.