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DESCRIPTION:

Latitude 40°07'24.1",   Longitude 89°59'02.3"   NAD83

Mason County, Illinois, Hydrologic Unit 07130008

Drainage area: 5,093 square miles

Datum of gage: 452.50 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1986-09-01	2025-07-17
Daily Data
Temperature, water, degrees Celsius	2022-08-17	2025-07-16	1000
Temperature, air, degrees Celsius	2022-08-17	2025-07-16	1065
Discharge, cubic feet per second	1909-10-01	2025-09-05	36409
Gage height, feet	1993-10-02	2025-09-05	11498
Suspended sediment concentration, milligrams per liter	1980-10-01	1997-09-29	2676
Suspended sediment discharge, short tons per day	1980-10-01	1997-09-29	2676
Daily Statistics
Temperature, water, degrees Celsius	2022-08-17	2025-01-07	810
Temperature, air, degrees Celsius	2022-08-17	2025-01-07	875
Discharge, cubic feet per second	1909-10-01	2025-05-21	36302
Gage height, feet	1993-10-02	2025-05-21	11391
Suspended sediment concentration, milligrams per liter	1980-10-01	1997-09-29	2676
Suspended sediment discharge, short tons per day	1980-10-01	1997-09-29	2676
Monthly Statistics
Temperature, water, degrees Celsius	2022-08	2025-01
Temperature, air, degrees Celsius	2022-08	2025-01
Discharge, cubic feet per second	1909-10	2025-05
Gage height, feet	1993-10	2025-05
Suspended sediment concentration, milligrams per liter	1980-10	1997-09
Suspended sediment discharge, short tons per day	1980-10	1997-09
Annual Statistics
Temperature, water, degrees Celsius	2022	2025
Temperature, air, degrees Celsius	2022	2025
Discharge, cubic feet per second	1910	2025
Gage height, feet	1994	2025
Suspended sediment concentration, milligrams per liter	1981	1997
Suspended sediment discharge, short tons per day	1981	1997
Peak streamflow	1910-01-22	2024-01-26	107
Field measurements	1939-03-14	2025-09-03	482
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1956-08-16	2024-01-29	696
Water-Year Summary	2006	2024	19
Revisions	Loading...

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