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USGS Water-Year Summary 2024
12112600 BIG SOOS CREEK ABOVE HATCHERY, NEAR AUBURN, WA
LOCATION - Lat 47°18'45", long 122°09'51" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.15, T.21 N., R.5 E., King County, WA, Hydrologic Unit 17110013, on left bank 0.2 mi upstream from fish hatchery, 2.7 mi east of Auburn, and at mile 0.9.
DRAINAGE AREA - 66.7 mi². excludes 3.67 mi² in vicinity of Youngs Lake (flow from which has been diverted to Cedar River since about 1935).
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1960 to current year. Chemical analyses October 1962 to October 1971, December 1995 to April 1998, August 2005, and April to August 2007. SPECIFIC CONDUCTANCE: March 1996 to September 1998. WATER TEMPERATURE: March 1996 to September 1998, October 2006 to December 2007.
GAGE - Water-stage recorder. Datum of gage is 77.2 ft above NGVD of 1929 and is 79.98 ft above NAVD of 1988 (GNSS survey by USGS, June 23, 2022).
REMARKS - City of Seattle diverts probably less than 2 ft³/s from Youngs Lake into Little Soos Creek, a tributary, during low flows. Prior to October 1966, fish hatchery 0.5 mi upstream from station diverted up to 19 ft³/s which was returned downstream from the station. Chemical analyses October 1962 to September 1971, at site 1.0 mi upstream. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,200 ft³/s, Feb. 9, 1996, gage height, 8.88 ft, estimated from slope-area measurement of peak flow; minimum discharge, 11 ft³/s, Sept. 5, 1963, gage height, 1.07 ft.
WATER-QUALITY RECORDS
PERIOD OF RECORD - October 1962 to October 1971, March 1996 to September 1998, October 2006 to December 2007 (discontinued).
CHEMICAL DATA: October 1962 to October 1971; December 1995 to April 1998; August 2005; April to June 2007, August 2007.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: March 1996 to September 1998.
WATER TEMPERATURE: March 1996 to September 1998, October 2006 to December 2007 (discontinued).
INSTRUMENTATION - Temperature recorder with 15-minute logging interval from October to December 2006; one-hour logging interval from December 2006 to December 2007.
REMARKS - Temperature record is good.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 162 microsiemens Oct. 17, 1996, but may have been higher during periods of missing record; minimum, 69 microsiemens Dec. 29, 1996, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum 22.0°C July 28, 1998; minimum 2.4°C Jan. 14 - 15, 2007.
EXTREMES FOR CURRENT YEAR - WATER TEMPERATURE: Maximum recorded, 12.2°C on October 1, 2007; minimum recorded, 3.4°C on November 23, 2007.
