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USGS Water-Year Summary 2024
413610087201001 WELL CH-1 AT CITY HALL, GARY, IN
Sand and gravel aquifers (glaciated regions)
Dune Deposit
Dune Deposit
LOCATION - Lat 41°36'09.51", long 87°20'09.62" referenced to North American Datum of 1983, Lake County, IN, Hydrologic Unit 04040001,
REVISIONS HISTORY - The elevation record was revised on 05/22/2020 for the period of 01/09/2020 to 01/11/2020. After further comparison with Gary City Hall CH-2 and CH-3 wells, it was determined that the applied correction was inappropriate. The correction was removed and data on 01/11/2020 from 00:00 to 08:00 was deleted.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 20.3 ft. Upper casing diameter 1 in; top of first opening 15.5 ft, bottom of last opening 20.3 ft.
DATUM - Land-surface datum is 599.08 ft above North American Vertical Datum of 1988. Measuring point: TOP OF CASING, 0.34 ft below land-surface datum, Apr. 19, 2016 to present; TOP OF CASING, 598.74 ft above land-surface datum, Apr. 19, 2016 to present.
PERIOD OF RECORD - May 2016 to March 2021.
GAGE -
Water-level recorder and three soil moisture probes at 10, 20 and 30 inches in depth.
Continuous groundwater temperature (T) and specific conductance (SC) data were collected at the site beginning on December 7, 2017 using a InSitu Aqua Troll 200 pressure transducer
EXTREMES FOR PERIOD OF RECORD - Highest water level, 589.13 ft above NAVD 1988, 05-24-20; lowest, 586.63 ft above NAVD 1988, November 21, 2018.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 20.3 ft. Upper casing diameter 1 in; top of first opening 15.5 ft, bottom of last opening 20.3 ft.
DATUM - Land-surface datum is 599.08 ft above North American Vertical Datum of 1988. Measuring point: TOP OF CASING, 0.34 ft below land-surface datum, Apr. 19, 2016 to present; TOP OF CASING, 598.74 ft above land-surface datum, Apr. 19, 2016 to present.
EXTREMES FOR PERIOD OF RECORD -
TEMPERATURE
Max Inst Temperature, water 2017-12-07* 20:00:00 (UTC -05:00) 16.3
Max Daily Mean Temperature, water 2017-12-09 16.3
Min Inst Temperature, water 2019-05-11* 23:00:00 (UTC -05:00) 11.9
Min Daily Mean Temperature, water 2019-05-12* 11.9
SPECIFIC CONDUCTANCE
Highest recorded specific conductance at 25 degrees Celsius, 2,490.3 uS/cm, July 20, 2018; lowest, 333.5 uS/cm, February 15, 2018.
