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DESCRIPTION:

Latitude 38°27'02",   Longitude 89°37'39"   NAD83

Washington County, Illinois, Hydrologic Unit 07140204

Drainage area: 4,393 square miles

Datum of gage: 379.79 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1986-02-14	2026-01-24
Daily Data
Temperature, water, degrees Celsius	1975-07-10	1981-09-29	1848
Discharge, cubic feet per second	1969-10-01	2026-01-23	20569
Gage height, feet	1993-09-29	2026-01-23	11222
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	1975-07-10	1981-09-29	1847
Suspended sediment concentration, milligrams per liter	1980-05-01	1997-09-29	6361
Suspended sediment discharge, short tons per day	1980-05-01	1997-09-29	6361
Daily Statistics
Discharge, cubic feet per second	1969-10-01	2025-11-16	20501
Gage height, feet	1993-09-29	2025-11-16	11154
Suspended sediment concentration, milligrams per liter	1980-05-01	1997-09-29	6361
Suspended sediment discharge, short tons per day	1980-05-01	1997-09-29	6361
Monthly Statistics
Discharge, cubic feet per second	1969-10	2025-11
Gage height, feet	1993-09	2025-11
Suspended sediment concentration, milligrams per liter	1980-05	1997-09
Suspended sediment discharge, short tons per day	1980-05	1997-09
Annual Statistics
Discharge, cubic feet per second	1970	2026
Gage height, feet	1993	2026
Suspended sediment concentration, milligrams per liter	1980	1997
Suspended sediment discharge, short tons per day	1980	1997
Peak streamflow	1970-04-25	2025-04-07	56
Field measurements	1969-01-28	2026-01-16	499
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1974-11-12	1997-09-08	575
Water-Year Summary	2006	2025	20
Revisions	Loading...

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