USGS Water-Year Summary for Site 11510700

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	Available Parameters
	00010 Temperature, water(Max.,Mean,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Min.,Max.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11510700 KLAMATH RIVER BELOW JOHN C. BOYLE POWERPLANT, NEAR KENO, OR

LOCATION - Lat 42°05'05", long 122°04'20" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.14, T.40 S., R.6 E., Klamath County, OR, Hydrologic Unit 18010206, on right bank, 0.7 mi downstream from John C. Boyle Powerhouse, 5 mi downstream from JC Boyle Dam, 8 mi downstream from Spencer Creek, and 8.5 mi southwest of Keno and at mile 219.7.

DRAINAGE AREA - 4,080 mi². approximately (not including Lost River or Lower Klamath Lake basins).

REVISIONS HISTORY - WDR OR-87-1: 1967.

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 1959 to current year. Prior to Oct. 1, 1961, published as "below Big Bend powerplant."

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,274.82 ft above NGVD of 1929 (levels by PacifiCorp).

REMARKS - Flow completely regulated. Large diurnal fluctuation caused by Keno and John C. Boyle powerplants. Diversions for irrigation upstream from station.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,600 ft³/s Feb. 21, 1996, gage height, 9.50 ft; minimum discharge, 273 ft³/s Sept. 25, 2004.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: October 2018 to current year.

pH: October 2018 to current year.

WATER TEMPERATURE: October 2018 to current year.

DISSOLVED OXYGEN: October 2018 to current year.

TURBIDITY: October 2018 to current year.

HIGH RANGE TURBIDITY: October 2019 to current year (seasonal records only).

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). Prior to June 21, 2016, data was collected using a YSI 6136 turbidity sensor. Manufacturer's stated accuracy is the greater of +/- 2 percent or 0.3 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 RECORD -

SPECIFIC CONDUCTANCE: Maximum, 348 microsiemens Mar. 9, 2019; minimum, 113 microsiemens May 2, 2023.

pH: Maximum, 9.0 units Apr. 9-14, 2023; minimum, 7.1 units Sept. 12, 13, 19, 20, 22, 2022.

WATER TEMPERATURE: Maximum, 24.3°C July 30, 2022; minimum, 1.3°C Jan. 2, 2022.

DISSOLVED OXYGEN: Maximum, 13.0 mg/L Jan. 4, 2022; minimum, 6.9 mg/L Sept. 12, 13, 2022.

TURBIDTY: Maximum, 303 FNU Apr. 28, 2020; minimum, 0.5 FNU Aug. 28-31, 2021.

HIGH RANGE TURBIDITY: Maximum, 643 FBU Apr. 22, 2020; minimum, 10 FBU on many day each year.