USGS Water-Year Summary for Site 12114500

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

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Water year 2025: 2025-10-01 to 2026-09-30

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USGS Water-Year Summary 2025

12114500 CEDAR RIVER BELOW BEAR CREEK, NEAR CEDAR FALLS, WA

LOCATION - Lat 47°20'32", long 121°32'52" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.32, T.22 N., R.10 E., King County, WA, Hydrologic Unit 17110012, on right bank 500 ft downstream from Bear Creek, and 12.2 mi southeast of town of Cedar Falls.

DRAINAGE AREA - 25.4 mi².

REVISIONS HISTORY - WSP 1716: 1956-57(M), 1959(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1945 to December 1963, October 1975 to current year.

GAGE - Water-stage recorder. Elevation of gage is 1,880 ft above NGVD of 1929 (from topographic map) and is 1,882.78 ft above NAVD of 1988 (from USGS GNSS survey, July 21, 2022). Prior to Sept. 16, 1960, at site 90 ft upstream at datum 2.35 ft higher.

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

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,620 ft³/s, Nov. 22, 1959, gage height, 6.98 ft, site and datum then in use, from rating curve extended above 890 ft³/s on basis of slope-area measurement of peak flow; minimum discharge, 12 ft³/s, Nov. 27, 1952.

WATER-QUALITY RECORDS

PERIOD OF RECORD - WATER TEMPERATURE: September 2019 to current year. TURBIDITY: September 2023 to current year.

INSTRUMENTATION - Temperature recorder with 15-minute logging interval, since September 2019. Turbidity recorder with 15-minute logging interval, since September 2023. Turbidity sensor is an Observator Analite NEP5000. 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. 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 RECORD - WATER TEMPERATURE: Maximum, 16.0°C, August 15, 2023; minimum, 0.0°C, Feb. 11, 2019 and several days in Jan. 2024 (est.). TURBIDITY: Maximum, 17.7 FNU, Dec. 5, 2023; minimum, 0.0 FNU, several days in Sept., 2024.