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Water-Year Summary for Site 12447200

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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.,Min.,Mean)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

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

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USGS Water-Year Summary 2021
LOCATION - Lat 48°16'53", long 119°42'12" referenced to North American Datum of 1927, in SW 1/4 sec.09, T.32 N., R.25 E., Okanogan County, WA, Hydrologic Unit 17020006, on right bank 75 ft upstream from highway bridge at Malott, 0.1 mi upstream from Loup Loup Creek, and at mile 17.0.
DRAINAGE AREA - 8,080 mi².
REVISIONS HISTORY - WDR WA-75-1: Drainage area.
PERIOD OF RECORD - April 1958 to current year. April 1958 to September 1965, published as "near Malott." Records published for both sites December 1965 to July 1967.
GAGE - Water-stage recorder. Datum of gage is 783.55 ft above NGVD of 1929. April 1958 to November 1965, water-stage recorder at site 3.9 mi downstream at NGVD of 1929.
REMARKS - Diversions upstream from station for irrigation of about 22,000 acres in the United States and 55,000 acres in Canada. Flow regulated by Okanagan and Skaha Lakes and by natural storage in other lakes. U.S. Geological Survey satellite telemeter at station. Published as "near Brewster" prior to 1964 and as "near Malott" 1963-66 (station 12447300).
  • Water Years 2014 to 2018: Records good except for estimated daily discharges, which are fair.
  • Water Years 2019, 2020: Records good except for estimated discharges, which are fair.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 45,600 ft³/s, June 3, 1972, gage height, 22.16 ft; minimum observed, 288 ft³/s, Sept. 4, 1970, gage height, 2.03 ft.
PERIOD OF RECORD - Daily water temperature records November 1969 to June 1971 and March 2005 to current year. Chemical analyses 1959-62, 1963-70 (partial record station), 1972, 1975-94.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: November 1969 to June 1971, March 2005 to current year.
INSTRUMENTATION - Water temperature recorder with 15-minute logging interval since March 2005.
  • Water Years 2014, 2016: Records fair.
  • Water Years 2015, 2019: Records good.
  • Water Year 2017: Records poor.
  • Water Year 2018: Records poor; after July 12 excellent.
  • Water Year 2020: Records excellent; expect for periods May 25 to June 9, poor.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 29.5°C, July 24, 2006; minimum, -0.2°C, on many days during winter.