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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.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
422308088195602 9-MCH-D
Sand and gravel aquifers (glaciated regions)
Quaternary System
Quaternary System
LOCATION - Lat 42°23'07.7", long 88°19'56.1" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 NW 1/4 sec.17, T.45 N., R.8 E., McHenry County, IL, Hydrologic Unit 07120006, 25 ft. south of McCullom Lake Road, 36 ft. west of the Harrison-Benwell Park entrance, 0.1 mi. northwest of Harrison Elementary School, 0.8 mi. east of the town of Wonder Lake, 0.9 mi. east of Wonder Lake, and 1.9 mi. southeast of Ringwood and Route 31. Owner: McHenry County.
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 863.52 ft NAVD88 on May 30, 2023, as determined by a GNSS Level II survey. Land-surface datum was previously published as 863.18 ft NAVD88 (furnished). Discrete water-level measurements prior to May 30, 2023, are referenced to the original datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 180 ft. Upper casing diameter 2 in; top of first opening 175 ft, bottom of last opening 179.5 ft. Well-casing includes 2-inch schedule 40 PVC pipe, 6 in. diameter borehole with bentonite seal, observation well.
DATUM - Land-surface datum is 863.52 ft above North American Vertical Datum of 1988. Measuring point: Top of PVC casing; High point marked, 2.74 ft above land-surface datum, Oct. 1, 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, 50.84 ft. below land-surface datum, October 13, 2019; lowest, 67.97 ft. below land-surface datum, June 20, 2024.
