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Water-Year Summary for Site 12451000

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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
00060 Discharge(Mean)  

Water year 2019: 2018-10-01 to 2019-09-30

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USGS Water-Year Summary 2019
LOCATION - Lat 48°19'47", long 120°41'26" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.26, T.33 N., R.17 E., Chelan County, WA, Hydrologic Unit 17020009, Lake Chelan National Recreation Area, on left bank 1,100 ft upstream from Boulder Creek, 1.4 mi upstream from Lake Chelan, and 2.1 mi northwest of Stehekin.
DRAINAGE AREA - 321 mi². Prior to 1979 published as 344 mi².
REVISIONS HISTORY - WSP 412: 1914. WSP 1316: 1911(M), 1914-15(M). WSP 1446: 1912(M). WSP 1933: Drainage area. WDR-80-2: Drainage area.
PERIOD OF RECORD - October 1910 to October 1915, January 1927 to current year. Monthly discharge only for some periods, published in WSP 1316.
GAGE - Water-stage recorder. Datum of gage is 1,098.5 ft above NGVD of 1912. To convert to NGVD of 1929, subtract 1.73 ft. Prior to Aug. 17, 1911, nonrecording gage 0.4 mi upstream from mouth at Lake Chelan at different datums (datum change made June 13, 1911). Aug. 17, 1911 to Oct. 31, 1915, nonrecording gage 0.2 mi downstream from Boulder Creek at different datum.
REMARKS - No known regulation or diversion. U.S. Geological Survey satellite telemeter at station.
  • Water Years 2014, 2016, 2017, 2019: Records fair except for estimated discharges, which are poor.
  • Water Year 2015: No estimated discharges, Records fair.
  • Water Year 2018: Records poor except for estimated discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 26,000 ft³/s, Oct. 20, 2003, gage height, 31.12 ft, from rating curve extended on basis of slope-area measurement at 18,800 ft³/s; minimum discharge, 56 ft³/s, Jan. 12, 1930.