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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.
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USGS Water-Year Summary 2024
421341088283701 15-COR-S
Sand and gravel aquifers (glaciated regions)
Quaternary System
Quaternary System
LOCATION - Lat 42°13'41", long 88°28'37" referenced to North American Datum of 1983, in NE 1/4 SW 1/4 SE 1/4 sec.01, T.43 N., R.6 E., McHenry County, IL, Hydrologic Unit 07090006, about 60 feet southwest of southwest corner of farm-service parking lot, 0.1 miles north of Hemmingsen Road, 2.8 miles west of Route 47, 4.8 miles northwest of Huntley, 0.4 miles southwest of Kishwaukee River, and 0.9 miles northeast of South Branch Kishwaukee River. Owner: McHenry County.
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 851.14 ft NAVD88 on May 30, 2023, as determined by a GNSS Level II survey. Land-surface datum was previously published as 851.23 ft NAVD88 (furnished). Discrete water-level measurements prior to May 30, 2023, are referenced to the original datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 55.1 ft. Upper casing diameter undefined; top of first opening 50.1 ft, bottom of last opening 54.6 ft. Well-casing includes schedule 40 PVC pipe, 8 in. diameter borehole with bentonite seal, observation well.
DATUM - Land-surface datum is 851.14 ft above North American Vertical Datum of 1988. Measuring point: Top of PVC casing; High point marked, 2.44 ft above land-surface datum, Oct. 27, 2008 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS: February 2009 to current.
GROUND-WATER QUALITY:
CHEMICAL: Water year 2011.
GROUND-WATER LEVELS: February 2009 to current.
GROUND-WATER QUALITY:
CHEMICAL: Water year 2011.
GAGE - Water level recorder and satellite telemeter.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 5.55 ft below land-surface datum, July 23, 2017; lowest, 12.01 ft below land-surface datum, October 12, December 12, 2012.
