USGS Water-Year Summary for Site 14138850

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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: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

14138850 BULL RUN RIVER NEAR MULTNOMAH FALLS, OR

LOCATION - Lat 45°29'54", long 122°00'40" referenced to North American Datum of 1927, in sec.12, T.1 S., R.63 E., Multnomah County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on right bank, 1.2 mi upstream from North Fork, 7.0 mi southeast of Multnomah Falls and at mile 14.8.

DRAINAGE AREA - 47.9 mi².

REVISIONS HISTORY - WDR OR-91-l: 1990.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1966 to current year.

GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,080 ft above NGVD of 1929, from topographic map.

REMARKS - Regulation at times since 1915 by Bull Run Lake (station 14138560). No diversion upstream from station.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 15,800 ft³/s Nov. 25, 1999, gage height, 14.46 ft; minimum discharge, 30 ft³/s Oct. 28-31, 1987.

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: August 1990 to July 1994.

SUSPENDED SEDIMENT DISCHARGE: October 1977 to September 1986.

INSTRUMENTATION - Water-quality monitor.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 35 microsiemens Sept. 25, 2005, July 12-15, Sept. 8, 2018, Sept. 23, 2024; minimum, 8 microsiemens Dec. 13, 14, 2006, Jan, 12, 2021.

pH: Maximum, 8.1 units Aug. 30, Sept. 1, 1990; minimum, 5.7 units Jan. 18, 1991.

WATER TEMPERATURE: Maximum, 19.0°C June 28, 2021; minimum, -0.3°C Jan. 11, 12, 1998.

TURBIDITY: Maximum, 44 NTU Jan. 15, 1991; minimum, 0.08 NTU Aug. 30, 31, 1992.