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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.
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USGS Water-Year Summary 2024
14141500 LITTLE SANDY RIVER NEAR BULL RUN, OR
LOCATION - Lat 45°24'56", long 122°10'13" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.10, T.2 S., R.5 E., Clackamas County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on left bank, 3.0 mi east of Bull Run, and at mile 1.95.
DRAINAGE AREA - 23.1 mi².
REVISIONS HISTORY - Revisions: Drainage area was revised on Mar. 22, 2017.
SURFACE-WATER RECORDS
PERIOD OF RECORD - May to July 1911, October 1911 to March 1912, June 1912 to April 1913, July 1919 to current year. Monthly discharge only for some periods in water years 1911-13, published in WSP 1318.
GAGE - Water-stage recorder. Elevation of gage is 720 ft above NGVD of 1929, from topographic map. May 23, 1911 to Apr. 29, 1913, nonrecording gage at site 0.85 mi downstream at different datum. July 1, 1919 to Sept. 30, 1931, water-stage recorder at site 0.1 mi downstream at different datum. Oct. 1, 1931 to Nov. 3, 1967, water-stage recorder at site 0.1 mi downstream at datum 712 ft above NGVD of 1929. Nov. 4, 1967 to Aug. 8, 1971, water-stage recorder at site 0.1 mi downstream at datum 697.44 ft above NGVD of 1929 (Portland General Electric Co. bench mark).
REMARKS - No regulation or diversion upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,320 ft³/s Nov. 20, 1921, gage height, 9.18 ft, site and datum then in use, from rating curve extended above 2,200 ft³/s; minimum discharge, 8.0 ft³/s Aug. 20, Sept. 16, 17, 1940.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: May 2006 to current year.
INSTRUMENTATION - Temperature probe and data logger.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 23.4°C June 28, 2021; minimum, 0.0°C Dec. 16, 17, 2008, Feb. 26, 2011, Feb. 5-8, 2014, Jan. 5, 2017.
