PROVISIONAL DATA SUBJECT TO REVISION

Station operated in cooperation with the U.S. Army Corps of Engineers and funded by the
U.S. Geological Survey National Streamflow Information Program (NSIP).

 STATION.-- 14211720  WILLAMETTE RIVER AT PORTLAND, OR

 LOCATION.--Lat 45° 31'07", long 122° 40'00", in NW 1/4 NE 1/4 sec.3, T.1 S., R.1 E., Multnomah 
     County, Hydrologic Unit 17090012, in pier at east end of drawspan, on upstream side of 
     Morrison Bridge, in Portland, and at mile 12.8.[location map]  
 DRAINAGE AREA.-- 11,100 mi2, approximately. 
 PERIOD OF RECORD.--October 1972 to September 1994. (Daily discharge); Un-verified stage 
     records for information only beginning October 1994. Data are not updated nor archived)
 GAGE.--Water-stage recorder. Datum of gage is 1.55 ft above NGVD of 1929 (levels by National 
     Weather Service). 
 REMARKS.--Flow regulated by many reservoirs upstream. Many diversions for irrigation 
     upstream from station. 
 EXTREMES FOR PERIOD OF RECORD.--(1972 to Sept. 1994) Maximum  gage height, 23.84 ft 
     Jan. 18, 1974.
 EXTREME FOR FEBRUARY 1996 FLOOD.--(Provisional) Maximum gage height, 27.74 ft. Feb. 9. 
 EXTREMES OUTSIDE PERIOD OF RECORD.--Floods of June 7, 1894, and June 1, 1948, reached stages 
     of 33.0 ft and 30.0 ft, respectively, from information by National Weather Service.