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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  2026-01-22  
 Daily Data
    Temperature, water, degrees Celsius  1967-10-01  2026-01-22  11468 
    Temperature, water, degrees Fahrenheit  1963-11-22  1967-09-29  2544 
    Discharge, cubic feet per second  1939-10-01  2026-01-21  31525 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016-03-26  2026-01-22  10683 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02-19  2026-01-22  6479 
    pH, water, unfiltered, field, standard units  2016-03-26  2026-01-22  10596 
    Dissolved organic matter fluorescence (fDOM), water, in situ, concentration estimated from reference material, micrograms per liter as quinine sulfate equivalents (QSE)  2023-01-24  2026-01-22  3271 
    Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)  2023-10-17  2026-01-22  2476 
    Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll  2023-01-24  2023-10-16  798 
    Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin  2023-01-24  2023-10-16  798 
    Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)  2023-10-17  2026-01-22  2476 
    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  2026-01-22  10714 
 Daily Statistics 
    Temperature, water, degrees Celsius  2016-03-26  2025-12-14 3538 
    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  2025-12-14 3518 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02-20  2025-12-14 2118 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2016-03  2025-12  
    Discharge, cubic feet per second  1939-10  2024-11  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016-03  2025-12  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020-02  2025-12  
 Annual Statistics 
    Temperature, water, degrees Celsius  2016  2026  
    Discharge, cubic feet per second  1940  2025  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2016  2026  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2020  2026  
 Peak streamflow 1940-02-06  2024-01-28  85 
 Field measurements 1977-12-14  2026-01-14  315 
 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  2025  20 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS Oregon Water Science Center
Email questions about this site to Oregon Water Science Center Water-Data Inquiries