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DESCRIPTION:

Latitude 45°18'00",   Longitude 122°21'10"   NAD27

Clackamas County, Oregon, Hydrologic Unit 17090011

Drainage area: 671 square miles

Datum of gage: 286.93 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1986-10-01	2026-01-24
Daily Data
Temperature, water, degrees Celsius	2001-07-12	2026-01-24	26005
Precipitation, total, inches -- Faraday Lake precip	2010-09-30	2026-01-23	4630
Discharge, cubic feet per second	1908-04-01	2026-01-23	43032
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2001-07-12	2026-01-23	25916
Dissolved oxygen, water, unfiltered, milligrams per liter	2001-07-12	2026-01-24	25919
pH, water, unfiltered, field, standard units	2001-07-12	2026-01-24	26126
Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)	2024-03-16	2026-01-23	2034
Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)	2024-03-13	2026-01-23	2042
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2001-07-12	2026-01-23	25520
Daily Statistics
Temperature, water, degrees Celsius	2001-07-12	2025-12-15	8623
Discharge, cubic feet per second	1908-04-01	2025-11-03	42951
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2001-07-12	2025-12-15	8594
Dissolved oxygen, water, unfiltered, milligrams per liter	2001-07-12	2025-12-15	8594
Monthly Statistics
Temperature, water, degrees Celsius	2001-07	2025-12
Discharge, cubic feet per second	1908-04	2025-11
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2001-07	2025-12
Dissolved oxygen, water, unfiltered, milligrams per liter	2001-07	2025-12
Annual Statistics
Temperature, water, degrees Celsius	2001	2026
Discharge, cubic feet per second	1908	2026
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2001	2026
Dissolved oxygen, water, unfiltered, milligrams per liter	2001	2026
Peak streamflow	1909-01-20	2025-02-23	117
Field measurements	1967-12-26	2026-01-15	250
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1996-06-08	2021-09-14	121
Water-Year Summary	2006	2025	20
Revisions	Loading...

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