USGS 14203500 TUALATIN RIVER NEAR DILLEY, OR

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text

Station operated in cooperation with the Bureau of Reclamation and the U.S. Army Corps of Engineers.

NOTE: River forecasts and additional data can be obtained at the 
National Weather Service's Advanced Hydrologic Prediction Services web page.

NOTE: The most current shifted rating for this site can be found at USGS Rating Depot website.
Available Parameters Available Period
  
2016-03-26  2025-10-29
1986-10-01  2025-10-29
2007-10-01  2025-10-29
2016-03-26  2025-10-29
2020-02-19  2025-10-29
2016-03-26  2025-10-29
2022-10-28  2025-10-29
2023-10-17  2025-10-29
2023-10-17  2025-10-29
2016-03-26  2025-10-29







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 10.5 10-29-2025   04:30 PDT
Graph of Temperature, water, degrees Celsius

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Discharge, cubic feet per second
Most recent instantaneous value: 84.1 10-29-2025   04:50 PDT
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Daily discharge, cubic feet per second -- statistics for Oct 29 based on 86 water years of record more
Min
(1953)		 25th
percen-
tile		 Most Recent
Instantaneous
Value Oct 29		 Median Mean 75th
percen-
tile		 Max
(1951)
6.40 66 84.1 111 144 170 904

Gage height, feet
Most recent instantaneous value: 9.82 10-29-2025   04:50 PDT
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 76 10-29-2025   04:30 PDT
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Dissolved oxygen, water, unfiltered, milligrams per liter
Most recent instantaneous value: 10.1 10-29-2025   04:30 PDT
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pH, water, unfiltered, field, standard units
Most recent instantaneous value: 7.3 10-29-2025   04:30 PDT
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Dissolved organic matter fluorescence (fDOM), water, in situ, concentration estimated from reference material, micrograms per liter as quinine sulfate equivalents (QSE)
Most recent instantaneous value: 16.9 10-29-2025   04:30 PDT
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Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)
Most recent instantaneous value: 0.27 10-29-2025   04:30 PDT
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Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)
Most recent instantaneous value: 0.43 10-29-2025   04:30 PDT
Graph of Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
Most recent instantaneous value: 7.1 10-29-2025   04:30 PDT
Graph of Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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