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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
12161000 SOUTH FORK STILLAGUAMISH RIVER NEAR GRANITE FALLS, WA
LOCATION - Lat 48°06'14", long 121°56'40" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.08, T.30 N., R.7 E., Snohomish County, WA, Hydrologic Unit 17110008, on right bank 0.3 mi upstream from county road bridge, 1.2 mi upstream from Canyon Creek, 1.6 mi northeast of Granite Falls, and at mile 34.9.
DRAINAGE AREA - 119 mi².
REVISIONS HISTORY - WSP 902: 1939. WSP 1286: 1929-31(M), 1932, 1935, 1937(M), 1939(P), 1940-41(M), 1943(P), 1947(P), WSP 1736: 1932-35(M), 1944(M), 1946-48(M), 1951(M), 1957(M). WSP 1932: 1938(P), 1945(P), 1950(P), 1956(P), 1959(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1902 to July 1903 (gage heights only), July 1928 to September 1980, November 1999 to September 2004 and October 2015 to present (gage heights only). Published as "at Robe" 1902-03. Chemical analyses July 1959 to September 1966, October 1973 to September 1974.
GAGE - Water-stage recorder. Elevation of gage is 310 ft above NGVD of 1929, from river-profile map. Prior to Aug. 21, 1928, nonrecording gage at site 8 mi upstream at different datum. Aug. 31 to Sept. 30, 1928, nonrecording gage at present site and datum.
REMARKS - Some small diversion for domestic use above station. No regulation. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 22.83 ft Nov. 6, 2006; minimum gage height, 2.99 ft Aug. 19-21, 1941.
