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USGS Water-Year Summary 2024
12059500 NORTH FORK SKOKOMISH RIVER NEAR POTLATCH, WA
LOCATION - Lat 47°19'48", long 123°14'31" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.07, T.21 N., R.4 W., Mason County, WA, Hydrologic Unit 17110017, on left bank 1.1 mi upstream from South Fork Skokomish River, 5.4 mi southwest of Potlatch, 7.2 mi downstream from City of Tacoma Cushman Dam No. 2, and at river mile 10.1. Drainage area is 117 mi², includes, 99 mi² upstream from Cushman Dam No. 2, which is noncontributing except during spillage. Datum of gage is 63.49 feet above NGVD of 1929.
DRAINAGE AREA - 117 mi². includes 97.9 mi² (revised) upstream from Cushman Dam No. 2, which is noncontributing except during spillage.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1944 to November 1949 (destroyed by flood of Nov. 27, 1949), March 1950 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 63.49 ft above NGVD of 1929 (levels by City of Tacoma) and is 67.687 ft above NAVD of 1988 (GNSS survey by USGS on June 28, 2021). Prior to Nov. 27, 1949, and Mar. 18 to May 9, 1950, water-stage recorder at site 200 ft downstream at present datum.
REMARKS - Upper portion of McTaggart Creek is diverted through Deer Meadow Creek into Cushman Reservoir No. 2. Flow regulated at Lake Cushman and at Cushman Reservoir No. 2 to supply powerplant, which discharges into Hood Canal. Entire flow of river normally diverted at Cushman Dam No. 2 except required in stream flow and infrequent large releases. Water temperatures March 1965 to September 1982. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,740 ft³/s, Nov. 4, 1955, gage height, 10.45 ft; minimum recorded discharge, 1.3 ft³/s, Sept. 5, 14, 16, 1951.
