USGS Water-Year Summary 2024
401913089534501 22N7E-28.5a (IL Tree Nursery)
Sand and gravel aquifers (glaciated regions)
Quaternary System
LOCATION - Lat 40°19'13.5", long 89°53'44.7" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SW 1/4 sec.28, T.22 N., R.7 E., Mason County, IL, Hydrologic Unit 07130003,
REVISIONS HISTORY - Revisions: Land-surface datum is 490.07 ft NAVD88, as determined by a GNSS Level II survey on April 19, 2022. Datum previously published as 489.87 ft NAVD88 from DGPS. No metadata exists for the original value, so the land-surface datum was updated based on the 2022 survey. Discrete water-level visits prior to April 19, 2022, are referenced to the original datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 32.1 ft. Upper casing diameter 4 in; top of first opening 21.8 ft, bottom of last opening 31.8 ft. Well-casing includes schedule 40 PVC pipe, 4 in. diameter borehole with bentonite seal, monitoring well.
DATUM - Land-surface datum is 490.07 ft above North American Vertical Datum of 1988. Measuring point: Top of 4-inch PVC casing, MP alt 491.57 NAVD88, 1.7 ft above land-surface datum, Jan. 12, 2017 to present.
PERIOD OF RECORD -
GROUND-WATER LEVELS: March 2017 to August 2020.
GROUND-WATER QUALITY:
WATER TEMPERATURE: March 2017 to August 2020.
SPECIFIC CONDUCTANCE: March 2017 to August 2020.
PH: March 2017 to August 2020.
DISSOLVED OXYGEN: March 2017 to August 2020.
NITRATE: March 2017 to August 2020.
GAGE - Water-level recorder, water-quality monitor, and satellite telemeter
EXTREMES FOR PERIOD OF RECORD -
WATER LEVEL -- Highest: 12.43 ft. below land-surface datum, June 24, 2019. Lowest: 18.95 ft. below land-surface datum, June 24, 2019.
WATER TEMPERATURE -- Maximum: 13.90 °C, February 6, 2019. Minimum: 11.40 °C, June 1, 2019.
SPECIFIC CONDUCTANCE -- Maximum: 665 uS/cm, July 25, 2018. Minimum: 464 uS/cm, June 27, 2019,.
PH -- Maximum: 8.0, May 19, 2017. Minimum: 7.1 on April 28, 2018.
DISSOLVED OXYGEN -- Maximum: 7.90 mg/L, June 28, 2019. Minimum: 2.30 mg/L, July 10, 2017.
NITRATE -- Maximum: 24.7 mg/L, May 3, 2019. Minimum: 4.4 mg/L, June 27, 2019.