USGS Water-Year Summary 2020
12155300 PILCHUCK RIVER NEAR SNOHOMISH, WA
LOCATION - Lat 47°56'06", long 122°04'19" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.08, T.28 N., R.6 E., Snohomish County, WA, Hydrologic Unit 17110011, on right bank, 1.8 mi northeast of Snohomish, and at mile 3.6.
DRAINAGE AREA - 127 mi².
REVISIONS HISTORY - WDR-WA-2009: 1995-98(P),2000-08(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1992 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 30.00 ft above NGVD of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Nov. 24, 1990, reached a stage of 18.75 ft, from high-water mark at former bridge, discharge, 7,100 ft³/s (from slope-area measurement of peak flow).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,000 ft³/s, Jan. 8, 2009, gage height, 20.39 ft; minimum discharge, 35 ft³/s, Sept. 6, 2003 and Aug. 27-29, 2015.