USGS Water-Year Summary for Site 14138870

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2024

14138870 FIR CREEK NEAR BRIGHTWOOD, OR

LOCATION - Lat 45°28'49", long 122°01'28" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.14, T.1 S., R.6 E., Multnomah County, OR, Hydrologic Unit 17080001, on right bank, 6.4 mi north of Brightwood and 0.6 mi upstream from Bull Run Reservoir Number One.

DRAINAGE AREA - 5.46 mi².

REVISIONS HISTORY - WDR OR-78-1: 1976. WDR OR-82-2: 1976(P), 1978-79(P), 1981, WDR OR-91-1: 1976, WDR OR-05-1: 2000-02.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1975 to current year.

GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,480 ft above NAVD of 1988, from topographic map.

REMARKS - No regulation or diversion upstream from station.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,690 ft³/s Nov. 25, 1999, gage height, 5.01 ft; minimum discharge, 1.4 ft³/s Sept. 5-7, 2003, Sept. 16, 17, 2021.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: October 1977 to current year.

pH: August 1990 to September 1992.

WATER TEMPERATURE: October 1977 to current year.

TURBIDITY: October 1990 to September 1994.

SUSPENDED SEDIMENT DISCHARGE: October 1977 to September 1986.

INSTRUMENTATION - Water-quality monitor.

REMARKS - Turbidity data prior to October 1990 are available in the files of the Portland Field Office.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 49 microsiemens May 6, 1988, Aug. 13, 1990; minimum, 4 microsiemens Jan. 16, 2011.

pH: Maximum recorded, 7.7 units Sept. 13, 1990, but may have been higher during periods of missing record; minimum recorded, 5.0 units Sept. 5, 6, 8, 1991, but may have been lower during periods of missing record.

WATER TEMPERATURE: Maximum, 17.2°C July 5, 2015; minimum, -0.1°C Feb. 6-8, 2014, Feb. 13, 2021, Dec. 23, 2022.

TURBIDITY: Maximum recorded, 11 NTU Nov. 25, 1991; minimum recorded, 0.04 NTU Feb. 15, 16, 1993.

SEDIMENT CONCENTRATIONS: Maximum, 200 mg/L Jan. 23, Feb. 20, 1982; minimum, 0 mg/L on many days.

SEDIMENT DISCHARGE: Maximum, 345 tons Dec. 2 1977; minimum, 0 ton on many days.