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DESCRIPTION:

Latitude 39°09'36.6",   Longitude 90°36'57.8"   NAD83

Calhoun County, Illinois, Hydrologic Unit 07130011

Drainage area: 28,690 square miles

Contributing drainage area: 28,690.00 square miles,

Datum of gage: 399.81 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	2007-10-01	2024-12-09
Daily Data
Gage height, feet	1987-05-28	2024-12-08	12754
Daily Statistics
Gage height, feet	1987-05-28	2024-12-08	12754
Monthly Statistics
Gage height, feet	1987-05	2024-12
Annual Statistics
Gage height, feet	1987	2025
Field measurements	1997-09-29	1998-10-21	6
Field/Lab water-quality samples	1977-10-26	1998-10-21	189
Water-Year Summary	2006	2024	19
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