Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site 14138900

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  

Water year 2021: 2020-10-01 to 2021-09-30
 

Print this page
USGS Water-Year Summary 2021
14138900 NORTH FORK BULL RUN RIVER NEAR MULTNOMAH FALLS, OR
LOCATION - Lat 45°29'40", long 122°02'05" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.11, T.1 S., R.6 E., Multnomah County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on left bank, 7.0 mi southeast of Multnomah Falls and at mouth.
DRAINAGE AREA - 8.32 mi².
REVISIONS HISTORY - WDR OR-91-1: 1976.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1965 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,060 ft above NGVD of 1929, from topographic map. Prior to Oct. 1, 1978 and June 13, 1989 to Sept. 30, 1990 (during bridge construction), at site 700 ft upstream at datum 18.7 ft higher. Oct. 1, 1978 to June 12, 1989, at present site and datum.
REMARKS - Regulation at times since 1958 by North Fork Reservoir, capacity, about 1,030 acre-ft. No diversion upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,700 ft³/s Jan. 20, 1972, probably affected by surge from release of water temporarily impounded by landslide upstream from station, gage height, 9.89 ft, from floodmark, site and datum then in use, from rating curve extended above 850 ft³/s on basis of estimate of peak flow from slope-area survey; minimum discharge, 7.52 ft³/s Sept. 5, 2019.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: October 1978 to current year.

pH: October 1980 to September 1981, August 1990 to September 1992.

WATER TEMPERATURE: October 1978 to current year.

TURBIDITY: October 1990 to September 1994.

SUSPENDED SEDIMENT DISCHARGE: October 1978 to September 1986.

INSTRUMENTATION - Water-quality monitor.
EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 103 microsiemens Jan. 13, 1981 (result of cement spill); minimum, 6 microsiemens Jan. 12, 13, 2021.

pH: Maximum recorded, 9.8 units Jan. 13, 1981 (result of cement spill); minimum recorded, 6.3 units June 19, 1981.

WATER TEMPERATURE: Maximum, 15.5°C June 28, 2021; minimum, -0.2°C Dec. 20, 2008.

TURBIDITY: Maximum recorded, 25 NTU Nov. 24, 1990; minimum recorded, 0.06 NTU Sept. 7, 13, 14, 1992.

SEDIMENT CONCENTRATION: Maximum daily, 205 mg/L Dec. 25, 1980; minimum, 0 mg/L on many days.

SEDIMENT DISCHARGE: Maximum daily, 765 tons Feb. 23, 1986; minimum, 0 ton on many days.