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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2025
413611087201004 WELL CH-3 AT CITY HALL, GARY, IN
Sand and gravel aquifers (glaciated regions)
Dune Deposit
Dune Deposit
LOCATION - Lat 41°36'11", long 87°20'10" referenced to North American Datum of 1983, Lake County, IN, Hydrologic Unit 04040001,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 15.5 ft. Upper casing diameter 1.25 in; top of first opening 14.5 ft, bottom of last opening 15.5 ft.
DATUM - Land-surface datum is 598 ft above North American Vertical Datum of 1988. Measuring point: NORTH SIDE OF TOP OF T FITTING, 599.45 ft above land-surface datum, Apr. 20, 2018 to May. 16, 2019; TOP OF NORTH SIDE OF PVC TEE FITTING. REPLACED OLD METAL FITTING TO ALLOW MORE ROOM. DCL, 599.79 ft above land-surface datum, May. 15, 2019 to present.
PERIOD OF RECORD - April 2018 to March 2021
GAGE - Water-level, temperature and specific conductance recorder.
EXTREMES FOR PERIOD OF RECORD -
Highest water level, 589.9 ft above NAVD88 datum, May 23, 2020.
Lowest water level, 586.35 ft above NAVD88 datum, February 21, 2021.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 15.5 ft. Upper casing diameter 1.25 in; top of first opening 14.5 ft, bottom of last opening 15.5 ft.
DATUM - Land-surface datum is 598 ft above North American Vertical Datum of 1988. Measuring point: NORTH SIDE OF TOP OF T FITTING, 599.45 ft above land-surface datum, Apr. 20, 2018 to May. 16, 2019; TOP OF NORTH SIDE OF PVC TEE FITTING. REPLACED OLD METAL FITTING TO ALLOW MORE ROOM. DCL, 599.79 ft above land-surface datum, May. 15, 2019 to present.
EXTREMES FOR PERIOD OF RECORD -
Max Inst Temperature, water 2020-09-13* 16:40:00 (UTC -05:00) 20.0
Min Inst Temperature, water 2019-04-01* 12:55:00 (UTC -05:00) 9.9
