USGS 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.)

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Water year 2024: 2024-10-01 to 2025-09-30

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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.

TURBIDITY: November 2012 to March 2013.

TOTAL DISSOLVED GAS: March 2015 to current year.

INSTRUMENTATION - Water-quality monitor.

REMARKS - 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.

TURBIDITY: Maximum, 26.0 FNU Dec. 8, 2012; minimum, 2.1 FNU Nov. 12, 2012.

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