PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 40°53'02.6", long
72°41'50.8" referenced to North American Datum of
1983, Suffolk County, NY, Hydrologic Unit 02030202, at south
side of intersection/on-ramp of CR-51/Moriches-Riverhead Rd and
Speonk Riverhead Rd, behind Suffolk County Community College
Eastern Campus sign.
WELL CHARACTERISTICS.--Depth 149 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Screen assumed at bottom.
DATUM.--Land-surface datum is 163 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of north side of plastic well casing, 163.15 ft above land-surface datum, Dec. 8, 1972 to Apr. 25, 2024; Top of north side of plastic well casing, 161.885 ft above land-surface datum, Apr. 25, 2024 to present; Top of 2ö pvc, raised approx 1.8ft above grade to protect equipment, inside 4ö black locked well cover, 163.762 ft above land-surface datum, Aug. 28, 2024 to present.
PERIOD OF RECORD.--December 1972 to September 2022, October 2024 to current year.
GAGE.--Water-level recorder and cellular telemetry installed September 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 30.42 ft above NGVD 1929 (29.45 ft above NAVD 1988), June 29, 1979; lowest measured, 22.30 ft above NGVD 1929 (21.33 ft above NAVD 1988), Mar. 19, 1987.
WELL CHARACTERISTICS.--Depth 149 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Screen assumed at bottom.
DATUM.--Land-surface datum is 163 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of north side of plastic well casing, 163.15 ft above land-surface datum, Dec. 8, 1972 to Apr. 25, 2024; Top of north side of plastic well casing, 161.885 ft above land-surface datum, Apr. 25, 2024 to present; Top of 2ö pvc, raised approx 1.8ft above grade to protect equipment, inside 4ö black locked well cover, 163.762 ft above land-surface datum, Aug. 28, 2024 to present.
PERIOD OF RECORD.--December 1972 to September 2022, October 2024 to current year.
GAGE.--Water-level recorder and cellular telemetry installed September 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 30.42 ft above NGVD 1929 (29.45 ft above NAVD 1988), June 29, 1979; lowest measured, 22.30 ft above NGVD 1929 (21.33 ft above NAVD 1988), Mar. 19, 1987.
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