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Water-Year Summary for Site 14140001

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  • 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
00060 Discharge(Mean)  

Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020
LOCATION - Lat 45°26'15", long 122°10'42" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.34, T.1 S., R.5 E., Clackamas County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on left bank, 1.8 mi downstream from Bull Run Reservoir Number Two, 2.7 mi northeast of Bull Run and at mile 4.7.
DRAINAGE AREA - 107 mi².
PERIOD OF RECORD - October 1959 to current year.
GAGE - Water-stage recorder. Datum of gage is 567.90 ft above NGVD of 1929 (levels by City of Portland).
COOPERATION - Records of daily diversion furnished by the City of Portland.
REMARKS - Flow regulated by Bull Run Lake (capacity, 12,270 acre-ft), Bull Run Reservoir Number One (capacity, 30,140 acre-ft), North Fork Reservoir (capacity, 1,030 acre-ft), and since 1961 by Bull Run Reservoir Number Two (capacity, 21,000 acre-ft). All records given herein include flow diverted from Bull Run Reservoir Number Two. Computation of monthly and annual adjusted flows discontinued water year 2014. Continuous water-quality records for period December 2000 to September 2006 have been collected at this location.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 25,100 ft³/s Dec. 22, 1964, from rating curve extended above 8,800 ft³/s on basis of computation of peak flow over dam; minimum daily, 11 ft³/s Nov. 16, 1987.