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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
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USGS Water-Year Summary 2024
422858088235601 HEBR-08-01
Sand and gravel aquifers (glaciated regions)
Quaternary System
Quaternary System
LOCATION - Lat 42°28'58.37", long 88°23'55.84" referenced to North American Datum of 1983, in NW 1/4 SE 1/4 NE 1/4 sec.10, T.46 N., R.7 E., McHenry County, IL, Hydrologic Unit 07120006, 39 feet east of gravel farm road, 58 feet south of Seaman Road, 0.25 miles east of tributary to North Branch Nippersink Creek, 0.3 miles north of Streets Lake, 0.8 miles south of Illinois/Wisconsin State Line Road, 1.0 mile west of Lange Road, and 1.9 miles northeast of Hebron. Owner: Illinois State Geological Survey.
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 902.59 ft NAVD88 on May 30, 2023, as determined by a GNSS Level II survey. Land-surface datum was previously published as 898 ft NAVD88 from LiDAR (furnished). Discrete water-level measurements prior to May 30, 2023, are referenced to the original datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 145.3 ft. Upper casing diameter undefined; top of first opening 140 ft, bottom of last opening 145 ft. Well-casing includes 2-inch schedule 40 PVC pipe, 5.5 in. diameter borehole sealed with benseal grout, observation well.
DATUM - Land-surface datum is 902.59 ft above North American Vertical Datum of 1988. Measuring point: Top of PVC Casing; High point, marked, 2.0 ft above land-surface datum, Sep. 11, 2008 to present; Top of PVC Casing; High point, marked, 900.0 ft above land-surface datum, Sep. 11, 2008 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS: September 2009 to current. Prior to September 2009,
observation well readings available from the Illinois State Geological Survey.
GROUND-WATER QUALITY:
CHEMICAL: Water year 2011.
GROUND-WATER LEVELS: September 2009 to current. Prior to September 2009,
observation well readings available from the Illinois State Geological Survey.
GROUND-WATER QUALITY:
CHEMICAL: Water year 2011.
GAGE - Water level recorder and satellite telemeter.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 23.37 ft below land-surface datum, October 5 and 6, 2019; lowest, 31.69 ft below land-surface datum, January 28, 2013.
