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Water-Year Summary for Site 12020800

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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
00060 Discharge(Mean)  
00065 Gage height(Mean)  

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

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USGS Water-Year Summary 2019
12020800 SOUTH FORK CHEHALIS RIVER NEAR WILDWOOD, WA
LOCATION - Lat 46°26'42", long 123°04'57" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.17, T.11 N., R.3 W., Lewis County, WA, Hydrologic Unit 17100103, on left bank at Wildwood Road bridge, 0.4 mi downstream from Black Creek, 1.2 mi southeast of Wildwood, and at mile 16.2.
DRAINAGE AREA - 27 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1998 to current year (seasonal records).
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is NAVD of 1988. Prior to May 1, 2018 at same site at datum NGVD of 1929 (levels by Lewis County).
REMARKS - No regulation or diversion upstream from station. U.S. Geological Survey satellite telemeter at station.
  • Water Years 2014 to 2019: (Seasonal Oct. 1 - Apr. 30) Records fair except discharges above 1,500 ft³/s, which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Feb. 8, 1996, reached a stage of 363.57 ft from floodmarks, datum then in use, discharge, 5,620 ft³/s, from rating curve extended above 2,600 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 12,200 ft³/s, Dec. 3, 2007, gage height, 365.98 ft, datum then in use; minimum discharge, 4.5 ft³/s, Oct. 17-19, 2002.