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Station operated in cooperation with U.S. Army Corps of Engineers.
14170000 LONG TOM RIVER AT MONROE, OR
LOCATION.--Lat 44° 18'47", long 123° 17'43", in NE 1/4 sec.33, T.14 S., R.5 W., Benton
County, Hydrologic Unit 17090003, on left bank at Monroe, 110 ft upstream from bridge on
State Highway 99W, 0.1 mi downstream from Shafer Creek, and at mile 6.8.
DRAINAGE AREA.--391 mi2.
PERIOD OF RECORD.--November 1920 to July 1921, October 1921 to April 1926, November 1926
to May 1927, October 1927 to current year. Prior to October 1930, published as "near Monroe".
GAGE.--Water-stage recorder and concrete control. Datum of gage is 270.57 ft above
NGVD of 1929. Prior to Nov. 24, 1944, nonrecording gage at various sites ranging from present
site to 1.5 mi downstream at different datums.
REMARKS.-Flow regulated since Nov. 1941 by Fern Ridge Lake (station 14168000). Several
small diversions upstream from station. Periodic suspended sediment data are available
for the period October 1991 to September 1994.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 19,300 ft3/s Jan. 2, 1943,
gage height, 17.14 ft, site and datum then in use, from graph based on gage readings,
includes some overflow from Willamette River near Junction City; no flow Oct. 20-22, 1944
(water filling pool at gage); minimum discharge observed prior to regulation, 7 ft3/s
Sept. 29, Oct. 1, 1939.
NOTE: The most current shifted rating for this site can be found at USGS Rating Depot website.
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