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Water-Year Summary for Site 12149000

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Available Parameters
00060 Discharge(Mean)  

Water year 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
12149000 SNOQUALMIE RIVER NEAR CARNATION, WA
LOCATION - Lat 47°39'58", long 121°55'27" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.09, T.25 N., R.7 E., King County, WA, Hydrologic Unit 17110010, on left bank 40 ft downstream from highway bridge, 1.3 mi northwest of Carnation, 1.9 mi downstream from Tolt River, and at mile 23.0.
DRAINAGE AREA - 603 mi².
REVISIONS HISTORY - WSP 1316: 1932-33(M). WSP 1446: 1934(M). WSP 1932: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1928 to current year. Monthly discharge only for October 1928 to February 1929, published in WSP 870. Prior to October 1951, published as "near Tolt."
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. Prior to Dec. 20, 1933, nonrecording gage on old bridge, 100 ft upstream and Dec. 20, 1933, to Sept. 30, 1939, water-stage recorder at present site, at datum 42.96 ft higher.
REMARKS - Several small diversions for irrigation and domestic use upstream from station. Low flow diverted for operation of powerplant at Snoqualmie Falls but returned to river upstream from station. Some pondage at Snoqualmie Falls and some diurnal fluctuation caused by powerplant. Chemical analyses October 1966 to June 1969. Water temperatures October 1966 to June 1969. U.S. Geological Survey satellite telemeter at station.
  • Water Year 2014: Records good except for discharges 9,000 to 20,000 ft³/s, which is fair, and estimated daily discharges, discharges above 20,000 ft³/s, which are poor. City of Seattle Water Department diverted an average daily discharge of 77 ft³/s.  
  • Water Year 2015: Records good except for discharges 9,000 to 20,000 ft³/s, which is fair, and estimated daily discharges, discharges above 20,000 ft³/s, which are poor. City of Seattle Water Department diverted an average daily discharge of 72 ft³/s.
  • Water Year 2016: No estimated daily discharges. Records good except for discharges 9,000 to 20,000 ft³/s, which are fair and discharges above 20,000 ft³/s, which are poor. City of Seattle Water Department diverted an average daily discharge of 66 ft³/s.
  • Water Year 2017: Records good except for discharges 9,000 to 20,000 ft³/s, which are fair and estimated discharges, discharges above 20,000 ft³/s, which are poor. City of Seattle Water Department diverted an average daily discharge of 71 ft³/s.
  • Water Year 2018: No estimated discharges. Records good except for discharges 9,000 to 20,000 ft³/s, which are fair and discharges above 20,000 ft³/s, which are poor. City of Seattle Water Department diverted an average daily discharge of 74 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 82,900 ft³/s, Jan. 8, 2009, gage height, 62.21 ft,; minimum discharge, 239 ft³/s, Aug. 21, 1945, but may have been less sometime during period of faulty intake action Sept. 13 or 14, 1949; minimum daily discharge, 341 ft³/s, Sept. 15, 1973.