USGS Water-Year Summary 2023
413516088043402 36N10E-22.5d2 (Lockport Prairie)
Silurian-Devonian aquifers
Silurian System
LOCATION - Lat 41°35'16.3", long 88°04'34.1" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 SW 1/4 sec.22, T.36 N., R.10 E., Will County, IL, Hydrologic Unit 07120004, deepest well of a two-well cluster, 0.4 miles south of intersection of Route 53/7 and Renwick Rd(W 9th St), 0.3 miles west of Des Plaines River, and 1.0 miles west of Lockport, IL.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 30 ft. Upper casing diameter 2 in; top of first opening 25 ft, bottom of last opening 30 ft.
DATUM - Land-surface datum is 571.6 ft above North American Vertical Datum of 1988. Measuring point: MP height measured by USGS; MP altitude taken from IEPA construction log, 2.80 ft above land-surface datum, Sep. 2, 2011 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS: March 2012 to February 2014. Periodic water-level measurements September 2011 to August 2014.
GROUND-WATER QUALITY
WATER TEMPERATURE: March 2012 to February 2014.
SPECIFIC CONDUCTANCE: March 2012 to February 2014.
GAGE - Water-level recorder, water-temperature and specific-conductance sensors.
EXTREMES FOR PERIOD OF RECORD -
GROUND-WATER LEVELS: Highest water level, 2.02 ft below land-surface datum, February, 22-23, 2014; lowest, 3.70 ft below land-surface datum, October 13, 2013.
WATER TEMPERATURE: Maximum, 17.0 oC, September 9-20, 2012; minimum, 6.7 oC, February 22-25, 2014.
SPECIFIC CONDUCTANCE: Maximum, 1,310 uS/cm at 25oC, many days during 2012-2013; minimum, 1,220 uS/cm at 25oC, February 20-25, 2014.