USGS Water-Year Summary for Site 12147500

Click to hide Water-Year Summary instructions and information

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(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	63680 Turbidity, Form Neph(Max.,Min.,Med.)

Select a water year

Water year 2024: 2024-10-01 to 2025-09-30

Print this page

USGS Water-Year Summary 2024

12147500 NORTH FORK TOLT RIVER NEAR CARNATION, WA

LOCATION - Lat 47°42'45", long 121°47'15" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.28, T.26 N., R.8 E., King County, WA, Hydrologic Unit 17110010, on right bank 2.9 mi upstream from confluence with South Fork, 7.4 mi northeast of Carnation, and at mile 11.7.

DRAINAGE AREA - 39.9 mi².

REVISIONS HISTORY - WSP 1566: 1957. WSP 1932: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1952 to December 1963, January 1964 to September 1965 (annual peaks furnished by City of Seattle), November 1967 to current year.

GAGE - Water-stage recorder. Elevation of gage is 600 ft above NGVD of 1929, from river-profile map.

REMARKS - No regulation or diversion upstream from station. U.S. Geological Survey satellite telemeter at station.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,560 ft³/s, Dec. 15, 1959, gage height, 13.15 ft, from rating curve extended above 2,800 ft³/s; minimum discharge, 31 ft³/s, Sept. 22, 23, 1986.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - WATER TEMPERATURE: February 1995 to current year. TURBIDITY: December 2019 to Current year.

INSTRUMENTATION - Temperature recorder with 15-minute logging interval since February 1995. An FTS DTS-12 turbidity sensor interfaced with a Data Collection Platform/Electronic Datalogger, 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 - 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. U.S. Geological Survey satellite telemeter at station.

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 16.7°C, June 28, 2021; minimum, 1.2°C, Dec. 27, 2008. TURBIDITY: Maximum, 400 FNU, Oct. 28, 2021; minimum turbidity, 0.0 FNU, many days.