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Water-Year Summary for Site 12117000

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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,Min.,Max.)  
00020 Temperature, air(Mean,Min.,Max.)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

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

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USGS Water-Year Summary 2021
LOCATION - Lat 47°23'12", long 121°50'42" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.19, T.22 N., R.8 E., King County, WA, Hydrologic Unit 17110012, Snoqualmie National Forest, on left bank 0.6 mi upstream from mouth, and 1.3 mi northeast of Selleck.
DRAINAGE AREA - 17.2 mi².
REVISIONS HISTORY - WSP 1932: Drainage area. WDR-WA-06-1: 1986-87(M), 1989-91(M), 1995-96(M), 1999(M), 2004(M).

Gage height and discharge for Feb. 5, 2020 were revised on July 7, 2020, based on a data review.

PERIOD OF RECORD - June to October 1945, August 1956 to current year (continuous-record gaging station). August 1997, August 2005 (Chemical analysis).
GAGE - Water-stage recorder. Elevation of gage is 940 ft above NGVD of 1929, from topographic map. June to October 1945 on right bank 350 ft downstream at different datum.
REMARKS - No regulation or diversion upstream from station. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,730 ft³/s, Jan. 29, 1965, gage height, 5.78 ft from rating curve extended above 1,100 ft³/s on basis of slope-area measurement; minimum discharge, 15 ft³/s, Oct. 3, 4, 7-14, 1979, Oct. 28-31, Nov. 3-10, 1987.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: September 2018 to current year.
REMARKS - Additional details are available from the Washington Water Science Center. Continuous water quality record is no longer rated, as of water year 2021. Prior ratings can be obtained via request to the Washington Water Science Center.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 14.6°C, June 28, 2021; minimum, 1.4°C, Feb. 11, 2019.