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DESCRIPTION:

Latitude 41°53'21.4",   Longitude 87°36'28.6"   NAD83

Cook County, Illinois, Hydrologic Unit 04060200

Datum of gage: 579.20 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	2007-10-01	2025-09-28
Daily Data
Gage height, feet	1997-08-15	2025-09-27	8540
Daily Statistics
Gage height, feet	1997-08-15	2025-07-28	8479
Monthly Statistics
Gage height, feet	1997-08	2025-07
Annual Statistics
Gage height, feet	1997	2025
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	2005-12-19	2005-12-19	1
Water-Year Summary	2008	2024	17
Revisions	Loading...

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