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DESCRIPTION:

Latitude 46°20'06",   Longitude 122°50'27"   NAD83

Cowlitz County, Washington, Hydrologic Unit 17080005

Drainage area: 496 square miles

Datum of gage: 120.00 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1992-10-01	2025-12-12
Daily Data
Discharge, cubic feet per second	1981-03-24	2025-12-10	16333
Gage height, feet	2003-09-30	2023-02-02	6987
Gage height, feet	2023-02-01	2025-12-11	1045
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010-04-01	2022-08-18	2322
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010-04-01	2022-08-18	1137
Suspended sediment concentration, milligrams per liter	1981-06-08	2024-09-30	13037
Suspended sediment discharge, short tons per day	1981-06-08	2024-09-30	15820
Daily Statistics
Discharge, cubic feet per second	1981-03-24	2024-11-13	15941
Gage height, feet	2003-09-30	2023-02-02	6987
Gage height, feet	2023-02-01	2024-11-13	652
Suspended sediment concentration, milligrams per liter	1981-06-08	2024-09-29	13036
Suspended sediment discharge, short tons per day	1981-06-08	2024-09-29	15819
Monthly Statistics
Discharge, cubic feet per second	1981-03	2024-11
Gage height, feet	2003-09	2023-02
Gage height, feet	2023-02	2024-11
Suspended sediment concentration, milligrams per liter	1981-06	2024-09
Suspended sediment discharge, short tons per day	1981-06	2024-09
Annual Statistics
Discharge, cubic feet per second	1981	2025
Gage height, feet	2003	2023
Gage height, feet	2023	2025
Suspended sediment concentration, milligrams per liter	1981	2024
Suspended sediment discharge, short tons per day	1981	2024
Peak streamflow	1982-02-20	2023-12-06	43
Field measurements	1981-03-25	2025-11-12	715
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1974-04-18	2024-02-21	7647
Water-Year Summary	2006	2024	19
Revisions	Loading...

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