USGS Water-Year Summary 2021
14158790 SMITH RIVER ABOVE SMITH RIVER RESERVOIR, NEAR BELKNAP SPRINGS, OR
LOCATION - Lat 44°20'05", long 122°02'45" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.24, T.14 S., R.6 E., Linn County, OR, Hydrologic Unit 17090004, Willamette National Forest, on right bank, 200 ft upstream from Smith River Reservoir, 0.7 mi downstream from Browder Creek, 10 mi north of town of Belknap Springs and at mile 4.4.
DRAINAGE AREA - 15.6 mi².
WDR OR 80-2: 1978(P).
Revisions: Drainage area was revised Feb. 21, 2017.
PERIOD OF RECORD - October 1960 to current year.
GAGE - Water-stage recorder. Datum of gage is 2,610.00 ft above NGVD of 1929 (levels by Eugene Water & Electric Board). Prior to Sept. 10, 1964, at datum 1.56 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,160 ft³/s Dec. 22, 1964, gage height, 11.9 ft, from floodmark, from rating curve extended above 560 ft³/s on basis of slope-area measurement of peak flow; minimum discharge, 1.2 ft³/s Oct. 13, 1991, result of log jam.
PERIOD OF RECORD
SPECIFIC CONDUCTANCE: July 2017 to current year.
WATER TEMPERATURE: July 2017 to current year.
INSTRUMENTATION - Water-quality monitor.
EXTREMES FOR PERIOD OF RECORD
SPECIFIC CONDUCTANCE: Maximum, 55 microsiemens Sept. 6-8, 2019; minimum 17 microsiemens Nov. 23, 2017, Apr. 8, 2019.
WATER TEMPERATURE: Maximum, 19.5°C Aug. 10, 2018; minimum, 0.0°C on several days during winters.