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Water-Year Summary for Site 14150000

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Available Parameters
00010 Temperature, water(Min.,Mean,Max.)  
00025 Air pressure(Max.,Min.,Mean)  
00047 Pressure, diss gases(Min.,Mean,Max.)  
00060 Discharge(Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
63680 Turbidity, Form Neph(Max.,Min.,Med.)  

Water year 2024: 2023-10-01 to 2024-09-30
 
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USGS Water-Year Summary 2024
14150000 MIDDLE FORK WILLAMETTE RIVER NEAR DEXTER, OR
LOCATION - Lat 43°56'45", long 122°50'10" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.05, T.19 S., R.1 W., Lane County, OR, Hydrologic Unit 17090001, on right bank, 0.6 mi upstream from Lost Creek, 2.0 mi northwest of Dexter, 2.6 mi downstream from Dexter Dam and at mile 201.2.
DRAINAGE AREA - 1,001 mi².
REVISIONS HISTORY - WSP 1638: 1948(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1946 to current year. Prior to October 1954, published as "at Lowell." Monthly discharge only, October 1954 to June 1955, published in WSP 1738.
GAGE - Water-stage recorder. Datum of gage is 592.30 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Aug. 23, 1950, nonrecording gage, and Aug. 23, 1950 to Sept. 30, 1954, at site 4.0 mi upstream at different datum. June 9, 1955 to Feb. 18, 1977, at present site at datum 3.00 ft higher.
REMARKS - Flow regulated since 1953 by Lookout Point Lake (active capacity, 349,200 acre-ft), since 1955 by Dexter Lake (re-regulating), and since 1961 by Hills Creek Lake (active capacity, 248,900 acre-ft).
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage, 13.9 ft Dec. 28, 1945, former site and datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 62,600 ft³/s Jan. 18, 1953, gage height, 12.46 ft, site and datum then in use, from rating curve extended above 33,000 ft³/s; minimum daily discharge, 100 ft³/s Nov. 25, 1960.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - BAROMETRIC PRESSURE: March 2015 to current year.
INSTRUMENTATION - Meteorological monitor.
EXTREMES FOR PERIOD OF RECORD - BAROMETRIC PRESSURE: Maximum, 763 mmHg Jan. 25, 2023; minimum, 722 mmHg Oct. 24, 2021.
REMARKS - BAROMETRIC PRESSURE: Collection, computation, and publication of barometric pressure data do not necessarily conform to standards used by the National Weather Service. Records published in this report are for general scientific use.
WATER-QUALITY RECORDS
PERIOD OF RECORD -

WATER TEMPERATURE: August 1955 to September 1997, August 2001 to current year.

DISSOLVED OXYGEN: August 2024 to current year.

TURBIDITY: November 2012 to March 2013, August 2024 to current year.

TOTAL DISSOLVED GAS: March 2015 to current year.

INSTRUMENTATION - Water-quality monitor. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
REMARKS -

TURBIDITY: TURBIDITY: Data collected using an Aqua-TROLL 600 sonde. Manufacturer's stated accuracy is the greater of +/- 2 percent or +/- 0.5 formazin nephelometric units (FNU) for 0-4000 FNU.  Prior to August 2024 data was collected using a Hydrolab DS5X turbidity sensor. Manufacturer's stated accuracy is the greater of +/- 1 percent up to 100 FNU or +/- 3 percent from 100-400 FNU, or +/-5 percent from 400-3000 FNU. Negative recorded values are reported as 0.0 FNU. Additional parameters collected at this location are available via NWISWeb.

Sensor depth collected at this location is not referenced in this document.

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Maximum, 21.7°C July 30, 2015, July 28, 2020; minimum recorded, 2.5°C Feb. 6, 1989, but may have been lower during period of missing record Feb. 9 to Mar. 30, 1989.

DISSOLVED OXYGEN: Maximum, 11.3 mg/L Aug. 9, 10, 2024; minimum, 9.1 mg/L Aug. 22-24, 2024.

TURBIDITY: Maximum, 26.0 FNU Dec. 8, 2012; minimum, <1 FNU on many days.

TOTAL DISSOLVED GAS: Maximum, 899 mmHg June 14, 2022; minimum, 715 mmHg Nov. 26, 27, 2019.