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Water-Year Summary for Site 14139900

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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
62614 Elevation, lake/res, NGVD29(Obs.)  

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

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USGS Water-Year Summary 2021
LOCATION - Lat 45°26'52", long 122°08'52" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.26, T.1 S., R.5 E., Clackamas County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on headworks dam on Bull Run River, 4.1 mi northeast of Bull Run and at mile 6.5.
DRAINAGE AREA - 102 mi².
PERIOD OF RECORD - December 1961 to current year. Prior to October 1975, monthend contents only.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by City of Portland). Prior to Dec. 31, 1975, nonrecording gage at same site and datum.
COOPERATION - Capacity table dated Dec. 24, 1961, furnished by City of Portland.
REMARKS - Reservoir is formed by earth and rockfill dam with concrete spillway built by City of Portland. Storage began about Dec. 20, 1961; first filling occurred Dec. 24, 1961. Capacity, 21,000 acre-ft at crest of spillway, elevation, 860.0 ft. Dead storage is negligible. Month-end contents and change in contents discontinued water year 2014.
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed, 23,660 acre-ft Dec. 22, 1964, elevation, 866.00 ft; no contents at times during low-flow periods.