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Water-Year Summary for Site 12148300

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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.
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  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  
63680 Turbidity, Form Neph(Max.,Med.,Min.)  

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

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USGS Water-Year Summary 2020
12148300 SOUTH FORK TOLT RIVER BELOW REGULATING BASIN, NEAR CARNATION, WA
LOCATION - Lat 47°41'49", long 121°47'10" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.33, T.26 N., R.8 E., King County, WA, Hydrologic Unit 17110010, on right bank 2.3 mi upstream from mouth and 6.5 mi northeast of Carnation.
DRAINAGE AREA - 29.6 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1982 to current year. Published as "South Fork Tolt River below regulating pond, near Carnation" March 1982 through September 1983.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 670 ft above NGVD of 1929, from topographic map.
REMARKS - Flow regulated by South Fork Tolt Reservoir 6.1 mi upstream since September 1963. Gage is located below City of Seattle Powerhouse discharge return. U.S. Geological Survey satellite telemeter at station.
  • Water Year 2014: Records good except for estimated daily discharges, which are poor. City of Seattle Water Department diverted an average daily discharge of 77 ft³/s.
  • Water Year 2015: No estimated daily discharges. Records good. City of Seattle Water Department diverted an average daily discharge of 72 ft³/s.
  • Water Year 2016: No estimated daily discharges. Records good. City of Seattle Water Department diverted an average daily discharge of 66 ft³/s.
  • Water Year 2017: No estimated daily discharges. Records good. City of Seattle Water Department diverted an average daily discharge of 71 ft³/s.
  • Water Year 2018: No estimated discharges. Records good. City of Seattle Water Department diverted an average daily discharge of 74 ft³/s.
  • Water Year 2019: No estimated discharges. Records good. City of Seattle Water Department diverted an average daily discharge of 63 ft³/s.
  • Water Year 2020: No estimated discharges. Records good except for Dec. 3 - Feb. 26, which are fair. City of Seattle Water Department diverted an average daily discharge of 66 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge not determined, Nov. 24, 1990; maximum daily discharge, 3,700 ft³/s, Nov. 24, 1990; minimum discharge, 36 ft³/s on many days during July and August, 1982.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 1994 to current year. TURBIDITY: December 2019 to current year.
INSTRUMENTATION - Temperature recorder with 15-min. recording interval. An FTS DTS-12 turbidity sensor with 15-minute recording interval. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
REMARKS -
  • Water Year 2014 to 2015: WATER TEMPERATURE records good.
  • Water Year 2016: WATER TEMPERATURE records excellent. No record May 17-19, 22 and 23.
  • Water Year 2017: WATER TEMPERATURE records excellent except for July 1-Sept. 30, which are good.
  • Water Year 2018 to 2019: WATER TEMPERATURE records good.
  • Water Year 2020: WATER TEMPERATURE records good. TURBIDITY records poor. No record Oct. 1-Dec. 4.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded, 17.9°C, Sept. 4, 2003; minimum, 0.5°C (rounded), Feb. 3, 1996, Dec. 29, 1996. TURBIDITY: Maximum recorded, >1600 FNU, Apr. 23, 2020; minimum, 0.00 FNU, many days each year.