USGS Water-Year Summary 2022
14246900 COLUMBIA RIVER AT PORT WESTWARD, NEAR QUINCY, OR
LOCATION - Lat 46°10'53", long 123°10'56" referenced to North American Datum of 1927, in NE 1/4 sec.16, T.8 N., R.4 W., Columbia County, OR, Hydrologic Unit 17080003, on left bank, 0.7 mi downstream from Crims Island, 3.0 mi northwest of Quincy and at mile 53.8.
DRAINAGE AREA - 256,900 mi². approximately.
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1968 to June 1970, June 1991 to current year. Prior to 2017, published as "at Beaver Army Terminal, near Quincy."
GAGE - Water-stage recorder and acoustic velocity meter. Datum of gage is Columbia River Datum. Subtract 1.00 ft from gage heights to convert to NGVD of 1929 gage heights. May 1968 to June 1970, water-stage recorder with auxiliary water-stage recorder at site 5.6 mi downstream, at datum 10.00 ft lower; June 27, 1991 to September 30, 2004, at present site, at datum 1.52 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 864,000 ft³/s Feb. 10, 1996; minimum daily discharge, 63,600 ft³/s Sept. 9, 2001; minimum unfiltered discharge recorded since water year 2007, -279,000 ft³/s Oct. 15, 2012, but may have been less during periods of missing record.