USGS Water-Year Summary for Site 14152000

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	63680 Turbidity, Form Neph(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Min.,Max.)

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

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USGS Water-Year Summary 2024

14152000 MIDDLE FORK WILLAMETTE RIVER AT JASPER, OR

LOCATION - Lat 43°59'54", long 122°54'17" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.14, T.18 S., R.2 W., Lane County, OR, Hydrologic Unit 17090001, on right bank, 25 ft downstream from highway bridge at Jasper, 0.1 mi downstream from Hills Creek and at mile 195.0.

DRAINAGE AREA - 1,340 mi².

REVISIONS HISTORY - WSP 1288: 1907-8, 1910-12, 1914-16, drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - September 1905 to February 1912, July 1913 to March 1917, October 1952 to current year. Monthly discharge only for some periods, published in WSP 1318.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 513.45 ft above NGVD of 1929. September 1905 to February 1912 and July 1913 to March 1917, nonrecording gage at approximately same site at datum about 1.5 ft higher. Oct. 22, 1952 to Sept. 30, 1953, nonrecording gage at site 25 ft upstream at same datum.

REMARKS - Flow regulated since 1953 by Lookout Point Lake (active capacity, 349,200 acre-ft), since 1955 by Dexter Lake (re-regulating), since 1961 by Hills Creek Lake (active capacity, 248,900 acre-ft), and since 1966 by Fall Creek Lake (active capacity, 115,500 acre-ft).

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 94,000 ft³/s Nov. 23, 1909, gage height, 17.4 ft, datum then in use, from graph based on gage readings, from rating curve extended above 42,000 ft³/s; minimum discharge, 366 ft³/s Dec. 5, 1954.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

WATER TEMPERATURE: October 1953 to December 1962, October 1963 to September 1987, October 2000 to current year.

DISSOLVED OXYGEN: October 2012 to February 2017 (seasonal records only), August 2023 to current year.

TURBIDITY: October 2012 to February 2018 (seasonal records only), August 2023 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: Data was 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 2023 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.

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Maximum, 23.1°C July 30, 31, 2015, July 28, 2020; minimum, 1.5°C Jan. 25-27, 1969.

DISSOLVED OXYGEN: Maximum, 14.8 mg/L Jan. 4, 2015; minimum, 7.7 mg/L Aug. 29, Sept. 2, 8-10, 2015.

TURBIDITY: Maximum, 514 FNU Dec. 12, 2012; minimum, <1 FNU on many days during most years.