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DESCRIPTION:

Latitude 45°22'46",   Longitude 122°34'34"   NAD27

Clackamas County, Oregon, Hydrologic Unit 170900110607

Drainage area: 940.0 square miles

Datum of gage: 0.0 feet above   NAVD88.

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	2002-06-21	2025-08-28	25281
Discharge, cubic feet per second	2001-06-01	2025-08-27	8853
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2002-06-21	2025-08-27	25202
Dissolved oxygen, water, unfiltered, milligrams per liter	2016-11-21	2025-08-28	9584
pH, water, unfiltered, field, standard units	2002-06-21	2025-08-28	25014
Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)	2024-03-13	2025-08-27	1589
Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)	2024-03-13	2025-08-27	1589
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2002-06-21	2025-08-27	24976
Daily Statistics
Temperature, water, degrees Celsius	2002-06-21	2025-06-08	8342
Discharge, cubic feet per second	2001-06-01	2025-01-09	8624
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2002-06-21	2025-06-08	8313
Dissolved oxygen, water, unfiltered, milligrams per liter	2016-11-21	2025-06-08	3110
Monthly Statistics
Temperature, water, degrees Celsius	2002-06	2025-06
Discharge, cubic feet per second	2001-06	2025-01
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2002-06	2025-06
Dissolved oxygen, water, unfiltered, milligrams per liter	2016-11	2025-06
Annual Statistics
Temperature, water, degrees Celsius	2002	2025
Discharge, cubic feet per second	2001	2025
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2002	2025
Dissolved oxygen, water, unfiltered, milligrams per liter	2017	2025
Peak streamflow	2002-04-14	2024-01-27	23
Field measurements	2001-06-21	2025-05-29	153
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	2012-07-19	2021-09-01	98
Water-Year Summary	2006	2024	19
Revisions	Loading...

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