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DESCRIPTION:

Latitude 45°10'02",   Longitude 122°09'18"   NAD27

Clackamas County, Oregon, Hydrologic Unit 170900110406

Drainage area: 594.0 square miles

Datum of gage: 840.0 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	2010-10-01	2025-08-28
Daily Data
Temperature, water, degrees Celsius	2005-04-17	2025-08-28	21917
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2005-04-18	2025-08-27	21767
Dissolved oxygen, water, unfiltered, milligrams per liter	2005-04-18	2025-08-28	21878
pH, water, unfiltered, field, standard units	2005-04-17	2025-08-28	21524
Dissolved organic matter fluorescence (fDOM), water, in situ, concentration estimated from reference material, micrograms per liter as quinine sulfate equivalents (QSE)	2023-01-05	2025-08-27	2895
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2005-04-18	2025-08-27	21570
Daily Statistics
Temperature, water, degrees Celsius	2005-04-18	2022-11-07	6333
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2005-04-18	2022-11-07	6283
Dissolved oxygen, water, unfiltered, milligrams per liter	2005-04-18	2022-11-07	6320
Monthly Statistics
Temperature, water, degrees Celsius	2005-04	2022-11
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2005-04	2022-11
Dissolved oxygen, water, unfiltered, milligrams per liter	2005-04	2022-11
Annual Statistics
Temperature, water, degrees Celsius	2005	2023
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2005	2023
Dissolved oxygen, water, unfiltered, milligrams per liter	2005	2023
Field measurements	1999-01-12	2000-09-30	10
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	2010-04-14	2011-09-16	20
Water-Year Summary	2006	2022	17
Revisions	Loading...

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