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Water-Year Summary for Site 11510700

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
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.)  

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

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USGS Water-Year Summary 2023
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).
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.

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.

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.