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Water-Year Summary for Site 12442500

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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
12442500 SIMILKAMEEN RIVER NEAR NIGHTHAWK, WA
LOCATION - Lat 48°59'05", long 119°37'02" referenced to North American Datum of 1927, in NW 1/4 sec.07, T.40 N., R.26 E., Okanogan County, WA, Hydrologic Unit 17020007, on left bank 1,000 ft upstream from Oroville-Tonasket Irrigation District canal intake, 1.6 mi northeast of Nighthawk, 3.8 mi downstream from Palmer Creek, and at mile 15.8.
DRAINAGE AREA - 3,550 mi².
REVISIONS HISTORY - WSP 1183: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1911 to current year (prior to September 1928, mean monthly discharge included Oroville-Tonasket Irrigation District canal). Published as "near Oroville" 1911-28.
GAGE - Water-stage recorder. Datum of gage is 1,137.70 ft above NGVD of 1929. Prior to Sept. 11, 1928, staff gages at sites 7 mi downstream (below Oroville-Tonasket Irrigation District canal) at various datums.
COOPERATION - This station is maintained by the United States under agreement with Canada.
REMARKS - Flow at high stages regulated by natural diversion into and release from Palmer Lake of about 6,000 acre-ft. Several small diversions upstream from station for irrigation of about 2,900 acres in the United States in 1946 and approximately 10,500 acres in Canada in 1957. U. S. Geological Survey satellite telemeter at station.
  • Water Years 2014 to 2017: Records good except for estimated daily discharges, which are fair.
  • Water Years 2018, 2019: Records good except for estimated discharges, which are fair.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 45,800 ft³/s, June 1, 1972; maximum gage height, 18.78 ft, May 31, 1972; minimum discharge, 65 ft³/s, Jan. 3, 1974; minimum gage height, 1.55 ft, Jan. 31, 1988, result of freezeup.
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 1986 to September 1987, March 2014 to current year.
INSTRUMENTATION - Water temperature recorder with a 15-minute logging interval.
REMARKS -
  • Water Years 2014, 2016, 2017: Temperature records excellent.
  • Water Year 2015: Temperature records good.
  • Water Year 2018, 2019: Temperature records fair.
  • Water Year 2020: Temperature records excellent; Good after June 26.
EXTREMES FOR PERIOD OF DAILY RECORD - Maximum, 23.6°C, July 27, 2017; Minimum, -0.3°C many days in winter.