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USGS 14203500 TUALATIN RIVER NEAR DILLEY, OR

  Stream Site

DESCRIPTION:
Latitude 45°28'30",   Longitude 123°07'23"   NAD27
Washington County, Oregon, Hydrologic Unit 17090010
Drainage area: 125 square miles
Datum of gage: 147.57 feet above   NGVD29.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1986-10-01  2025-10-17  
 Daily Data
    Temperature, water, degrees Celsius  1967-10-01  2025-10-16  11174 
    Temperature, water, degrees Fahrenheit  1963-11-22  1967-09-29  2544 
    Discharge, cubic feet per second  1939-10-01  2025-10-16  31428 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016-03-26  2025-10-16  10389 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02-19  2025-10-16  6185 
    pH, water, unfiltered, field, standard units  2016-03-26  2025-10-16  10302 
    Dissolved organic matter fluorescence (fDOM), water, in situ, concentration estimated from reference material, micrograms per liter as quinine sulfate equivalents (QSE)  2022-10-18  2025-10-16  3271 
    Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)  2023-10-17  2025-10-16  2182 
    Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll  2022-10-18  2024-01-08  1208 
    Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin  2022-10-18  2024-01-08  1208 
    Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)  2023-10-17  2025-10-16  2182 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2016-03-26  2025-10-16  10419 
 Daily Statistics 
    Temperature, water, degrees Celsius  2016-03-26  2025-08-24 3426 
    Discharge, cubic feet per second  1939-10-01  2024-11-06 31084 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016-03-26  2025-08-24 3406 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02-20  2025-08-24 2006 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2016-03  2025-08  
    Discharge, cubic feet per second  1939-10  2024-11  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016-03  2025-08  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02  2025-08  
 Annual Statistics 
    Temperature, water, degrees Celsius  2016  2025  
    Discharge, cubic feet per second  1940  2025  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016  2025  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020  2025  
 Peak streamflow 1940-02-06  2024-01-28  85 
 Field measurements 1977-12-14  2025-08-13  310 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 1981-10-28  2021-10-13  1015 
 Water-Year Summary 2006  2024  19 
 Revisions  Loading...
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