USGS Water-Year Summary 2024
413743089310102 19N8E-13.1a2 (LEE-92E)
Sand and gravel aquifers (glaciated regions)
Quaternary System
LOCATION - Lat 41°37'43.6", long 89°31'01.0" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SE 1/4 sec.13, T.19 N., R.8 E., Lee County, IL, Hydrologic Unit 07090007, about 6 mi northwest of Ohio at Green River State Wildlife Management Area, Local name: 19N8E-13.1a2, Owner: University of Illinois, Illinois State Water Survey.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 173 ft. Upper casing diameter 2 in; top of first opening 168 ft, bottom of last opening 173 ft.
DATUM - Land-surface datum is 677.27 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of PVC Casing; east side, 2.25 ft above land-surface datum, May. 19, 1992 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS: April 2011 to current. Prior to 2011, observation well readings available from Illinois State Water Survey.
GAGE - Water level recorder and satellite telemetry.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 19.87 ft below land-surface datum, June 5, 2019; lowest, 59.76 ft below land-surface datum, August 22, 2021.