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Water-Year Summary for Site 11502500

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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(Mean,Max.,Min.)  
00060 Discharge(Mean)  
63680 Turbidity, Form Neph(Med.,Min.,Max.)  
99409 Susp sediment,wu,est(Max.,Mean,Min.)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 42°33'51.75", long 121°52'46.97" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 sec.04, T.35 S., R.7 E., Klamath County, OR, Hydrologic Unit 18010201, on right bank, 0.8 mi downstream from Sprague River, 1.2 mi southwest of Chiloquin and at mile 10.3.
DRAINAGE AREA - 3,000 mi². approximately.
REVISIONS HISTORY - WSP 981: 1938(M). WSP 1565: 1920(M), 1927(M), 1938.
PERIOD OF RECORD - June 1917 to current year. Monthly discharge only for October 1922 to August 1923, published in WSP 1315-B.
GAGE - Water-stage recorder. Datum of gage is 4,148.50 ft above NGVD of 1929. Prior to Sept. 1, 1923, at different datum. Sept. 1, 1923 to July 12, 1991, at site 0.6 mi upstream at datum 7.05 ft higher.
REMARKS - Some regulation by diversion dams and log pond operations on Sprague River. Diversions for irrigation upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 17,100 ft³/s Jan. 5, 1997, gage height, 10.27 ft; minimum discharge, 285 ft³/s Aug. 6, 8, 9, 1994.

WATER TEMPERATURE: October 2007 to June 2011, March 2012 to current year.

TURBIDITY: October 2007 to May 2011, March 2012 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 Forest Technology DTS-12 turbidity sensor. Manufacturer's stated accuracy is +/- 2 percent of reading + 0.2 Formazin Nephelometric Units (FNU) for 0-399 FNU, and +/- 4 percent for 400 to 1,600 FNU. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU. Chemical analyses and suspended sediment data collected at this location are available via NWISWeb.

WATER TEMPERATURE: Maximum, 21.1°C June 30, July 1, 2013; minimum, 0.0°C Dec. 8, 2013, Dec. 31, 2014, Dec. 18, 19, 2016, Jan. 6, 2017.

TURBIDITY: Maximum, 76 FNU Mar. 19, 2012; minimum, <1 FNU on several days during most years.