USGS Water-Year Summary for Site 12037400

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	Available Parameters
	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

12037400 WYNOOCHEE RIVER ABOVE BLACK CREEK, NEAR MONTESANO, WA

LOCATION - Lat 47°00'42", long 123°39'15" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.27, T.18 N., R.8 W., Grays Harbor County, WA, Hydrologic Unit 17100104, on left bank 2,000 ft upstream from Black Creek, 3.5 mi northwest of Montesano, and at mile 5.9.

DRAINAGE AREA - 155 mi².

REVISIONS HISTORY -

WSP 1932: Drainage area.

Current year revisions: Gage height and discharge for the period of Feb. 1, 2019 to June 19, 2019 were revised on Mar. 28, 2020, based on changes to applied gage height corrections, mean gage heights for measurements, and the stage-discharge rating.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1956 to current year. Water temperature October 1969 to September 1986.

GAGE - Water-stage recorder. Datum of gage is NAVD of 1988, as of 5/9/2018 (Level II GNSS survey by USGS). Previous to this, gage datum was 40 ft above NGVD of 1929 (topographic map).

REMARKS -

Since August 1972, flow regulated by Wynoochee Dam, 45.7 mi upstream, for flood control, during summer months to augment the natural river flow, and for the water supply for the City of Aberdeen. Some regulation from 1969 to August 1972 due to dam construction. Sediment records October 1961 to June 1965. Water temperatures October 1969 to September 1986. Tacoma Public Utilities satellite telemeter at station. The City of Aberdeen diverted about 66 ft³/s for municipal supply at intake 2.2 mi upstream as follows:

Water Year	Discharge (cfs)	Water Year	Discharge (cfs)	Water Year	Discharge (cfs)	Water Year	Discharge (cfs)
2014	66	2015	65	2016	61	2017	68
2018	65	2019	56	2020	50	2021	54
2022	54

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 25,600 ft³/s, Mar. 19, 1997, gage height, 20.21 ft; maximum gage height, 20.54 ft, Dec. 10, 1956; minimum discharge, 3.0 ft³/s, part or all of each day Aug. 26-30, 1967, gage height, 2.86 ft.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - TURBIDITY: December 2018 to current year.

INSTRUMENTATION - Turbidity sensor (Observator Analite NEP-5000) interfaced with a Data Collection Platform/Electronic Datalogger, with 15-minute logging interval, since December 2018. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.

REMARKS - Additional details are available from the Washington Water Science Center.

EXTREMES FOR PERIOD OF RECORD - TURBIDITY: Maximum, 450 FNU, Jan. 13, 2021; minimum, 0 FNU, many days May to Oct. 2020 and June to Sept. 2021.