USGS Water-Year Summary for Site 12056500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00020 Temperature, air(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2024

12056500 NORTH FORK SKOKOMISH RIVER BELOW STAIRCASE RAPIDS, NEAR HOODSPORT, WA

LOCATION - Lat 47°30'52", long 123°19'43" referenced to North American Datum of 1927, in NW 1/4 sec.04, T.23 N., R.5 W., Mason County, WA, Hydrologic Unit 17110017, Olympic National Park, on left bank 1.2 mi upstream from Lake Cushman, 2.8 mi upstream from Dry Creek, 11.3 mi northwest of Hoodsport, and at mile 29.2.

DRAINAGE AREA - 57.2 mi².

REVISIONS HISTORY - WSP 1286: 1932, 1935, 1937(M), 1942(M), 1947(P), 1948(M). WSP 1636: 1940(M). WSP 1736: 1927. WSP 1932: Drainage area. The maximum discharge for the water year 1986 has been revised to 15,200 ft³/s, Jan. 18, 1986, gage height, 11.10 ft.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1924 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 762.26 ft above NGVD of 1929 (by topographic map) and is 766.19 ft above NAVD of 1988 (USGS GNSS survey, July 1, 2021). Prior to Nov. 1, 1934, water-stage recorder, and Nov. 1, 1934, to Nov. 10, 1941, nonrecording gages, on right bank at same datum.

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

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 27,000 ft³/s, Nov. 5, 1934, gage height, 14.4 ft, from high-water mark, from rating curve extended above 9,800 ft³/s, on basis of slope-area measurement at gage height 12.2 ft; minimum discharge recorded, 16 ft³/s, Sept. 23, 1930, gage height, 1.12 ft.

WATER-QUALITY RECORDS

PERIOD OF RECORD - September 1973 to September 1985; September 1995 to April 1998; January 2001 to September 2008, December 2011 to current year.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: April 1996 to April 1998. WATER TEMPERATURE: April 1965 to September 1982, June 1989 to December 1989, December 1990 to April 1991, June 1992 to April 1998, October 1999 to September 2006, December 2011 to current year.

INSTRUMENTATION - Temperature recorder April 1965 to September 1982, June 1989 to April 1998, October 1999 to September 2006, December 2011 to current year. Water-quality monitor April 1996 to April 1998. Electronic Data Logger with 15-minute recording interval. Prior to June 13, 1997, a 60-minute recording interval.

REMARKS - Additional details are available from the Washington Water Science Center. Land slide on left bank about 610 ft above footbridge occurred in water year 2008. 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.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 108 microsiemens, September 11 and 28, 1996; minimum, 25 microsiemens, March 18 and 19, 1997. WATER TEMPERATURE: Maximum, 17.4°C, Aug. 17, 2016; minimum, 0.0°C, March 24, 1976, January 31, 1996, December 29, 1996, and December 19, 2012.