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Water-Year Summary for Site 12439000

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
62614 Elevation, lake/res, NGVD29(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 48°57'24", long 119°26'18" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.21, T.40 N., R.27 E., Okanogan County, WA, Hydrologic Unit 17020006, on west shore 1.0 mi north of Oroville, 3.0 mi south of international boundary, and at mile 79.5.
DRAINAGE AREA - 3,132 mi².
REVISIONS HISTORY - WSP 1346: Drainage area. WDR WA-75-1: Drainage area.
PERIOD OF RECORD - July 1928 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. Prior to Sept. 2, 1928, nonrecording gage, and Sept. 2, 1928, to Nov. 9, 1929, water-stage recorder, 100 ft south of international boundary. Nov. 10, 1929, to Sept. 7, 1930, Mar. 22, 1952, to Sept. 23, 1953, June 25, 1955, to Apr. 11, 1956, nonrecording gage, and Sept. 8, 1930, to Mar. 21, 1952, Sept. 24, 1953, to June 24, 1955, Apr. 12, 1956, to Feb. 7, 1969, water-stage recorder, at site 1.0 mi south of international boundary. All elevations prior to Oct. 1, 1944, at datum 2.39 ft lower. To convert from present datum to Geodetic Survey of Canada 1934 datum, subtract 1.63 ft; to convert from present datum to 1947 joint adjustment of U.S. Coast and Geodetic Survey and Geodetic Survey of Canada, subtract 0.26 ft.
COOPERATION - This station is maintained by the United States under agreement with Canada.

Approximately 44,000 acres are irrigated upstream from station in Canada. Elevation may occasionally be affected by dam at Zosel's Mill in Oroville and by backwater from the Similkameen River during extreme high water. U.S. Geological Survey satellite telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 29, 1894, reached an elevation of 918.8 ft, plus or minus 0.5 ft, present datum, 1.0 mi downstream from present lake outlet, from floodmark on old Okanogan Hotel Building, documented in 1930 from the diary of Mr. and Mrs. Stansbury, operators of the hotel in 1894.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 917.11 ft, June 2, 3, 1972; minimum elevation, 908.82 ft, present datum, Oct. 14, 1929.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2012 to current year.
INSTRUMENTATION - Water temperature recorder since October 2012 with 15-minute logging interval.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 30.5°C, June 30, 2021; minimum, 0.0°C, many days, most winters.