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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
393750090333101 171-5-22-1183 (Scott CRN)
Sand and gravel aquifers (glaciated regions)
Quaternary System
Quaternary System
LOCATION - Lat 39°37'49.70", long 90°33'31.74" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 SW 1/4 sec.28, T.14 N., R.13 W., Scott County, IL, Hydrologic Unit 07130011, about 1 mi east of IL Route 100 and 5.5 mi west of Winchester, IL on the south side of IL Route 106. Owner: Illinois Department of Agriculture (IDOA).
REVISIONS HISTORY - Revisions: Land-surface datum was revised to 428.66 ft NAVD88 on Nov. 6, 2023, as determined by levels. Land-surface datum was previously published in error as 428.69 ft NGVD29 from levels. Discrete water-level measurements referenced to NGVD29 and NAVD88 prior to Nov. 6, 2023, were revised, based on changes to the land-surface datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 17.1 ft. Upper casing diameter 2 in; top of first opening 12 ft, bottom of last opening 16 ft.
DATUM - Land-surface datum is 428.66 ft above North American Vertical Datum of 1988. Measuring point: Top of PVC casing-north side; top of flush-mount casing is LSD, MP alt 428.19 NGVD29, 0.5 ft below land-surface datum, Jan. 7, 2004 to Dec. 13, 2017; Top of PVC casing-north side; top of flush-mount casing is LSD, MP alt 428.51 NGVD29, 0.18 ft below land-surface datum, Dec. 13, 2017 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS:
January 2004 to September 2017 (periodic measurements), September 2017 to current (continuous record).
GAGE - Water-level recorder and satellite telemeter.
EXTREMES FOR PERIOD OF RECORD -
EXTREMES FOR PERIOD OF CONTINUOUS RECORD:
Highest water level, 2.96 ft. below land-surface datum, July 1, 2020; lowest, 8.23 ft. below land-surface datum, Aug. 23, 2018.
EXTREMES OUTSIDE PERIOD OF CONTINUOUS RECORD:
Highest water level, 2.29 ft. below land-surface datum, measured June 20, 2011; lowest water level, 8.7 ft. below land-surface datum, measured Aug. 27, 2014, in cooperation with the Illinois Department of Agriculture.
