USGS Water-Year Summary for Site 11509500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Min.,Max.,Med.)
	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

11509500 KLAMATH RIVER AT KENO, OR

LOCATION - Lat 42°08'00", long 121°57'40" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.35, T.39 S., R.7 E., Klamath County, OR, Hydrologic Unit 18010206, on left bank, 1.7 mi west of Keno, 1.3 mi downstream from the Keno Dam, 4.5 mi upstream from Spencer Creek, and at mile 231.9.

DRAINAGE AREA - 3,920 mi². approximately (not including Lost River or Lower Klamath Lake basins).

REVISIONS HISTORY - The assigned gage-heights for discharge measurements 525, 527, and 530 were revised on May 15, 2020.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1904 to December 1913, October 1929 to current year. Monthly discharge only October to December 1929, published in WSP 1315-B.

GAGE - Water-stage recorder. Elevation of gage is 3,961 ft above NGVD of 1929 (from river-profile survey). See WSP 1735 for history of changes prior to Nov. 6, 1954.

REMARKS - Flow regulated since 1919 by Upper Klamath Lake (capacity, 523,700 acre-ft). Diurnal fluctuation caused by Keno powerplant 0.9 mi upstream. Diversions for irrigation upstream from station.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage, 15.3 ft (original datum), from floodmark, about May 10, 1904, discharge, 9,250 ft³/s.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 10,300 ft³/s Feb. 28, 1986, gage height, 12.82 ft, caused by regulation from Keno powerplant; minimum discharge, 26 ft³/s Sept. 23, 1956; minimum daily, 60 ft³/s May 19, 1934.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: October 2018 to current year.

pH: October 2018 to current year.

WATER TEMPERATURE: December 2005 to current year.

DISSOLVED OXYGEN: October 2018 to current year.

TURBIDITY: October 2018 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 collected using a YSI EXO turbidity sensor. Manufacturer's stated accuracy is the greater of +/- 2 percent or 0.3 Formazin Nephelometric Units (FNU) for 0-999 FNU, and +/- 5 percent for 1,000-4,000 FNU. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 390 microsiemens Mar. 8, 2019; minimum, 111 microsiemens May 28, 2023.

pH: Maximum, 9.6 units July 14, 2020; minimum, 7.1 units Sept. 13, 2019.

WATER TEMPERATURE: Maximum, 26.3 °C July 27, 2006; minimum recorded, 0.0 °C Jan. 9, 16, 2008.

DISSOLVED OXYGEN: Maximum, 13.3 mg/L Jan. 1, 2022; minimum, 3.7 mg/L Sept.14, 2019.

TURBIDITY: Maximum, 83 FNU Apr. 10, 2019; minimum, 0.7 FNU Aug. 25, 2023.