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.)
	80300 Susp sediment, wu, point est(Mean) [From EXO2]
	99409 Susp sediment,wu,est(Mean) [From EXO2]

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

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USGS Water-Year Summary 2024

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.

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. Additional parameters collected at this location are available via NWISWeb.

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, 6.8 mg/L Aug. 18, 21, 2023.

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