USGS Water-Year Summary for Site 12438000

Click to hide Water-Year Summary instructions and information

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.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)

Select a water year

Water year 2024: 2024-10-01 to 2025-09-30

Print this page

USGS Water-Year Summary 2024

12438000 COLUMBIA RIVER AT BRIDGEPORT, WA

LOCATION - Lat 48°00'24", long 119°39'51" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.14, T.29 N., R.25 E., Douglas County, WA, Hydrologic Unit 17020005, on left bank at Bridgeport, 1.0 mi downstream from Foster Creek, 1.6 mi downstream from Chief Joseph Dam, and at mile 543.9.

DRAINAGE AREA - 75,700 mi².

REVISIONS HISTORY -

WSP 1933: Drainage area.

Daily mean discharges for the period Apr. 2, 1952 to Dec. 7, 2022 were revised on July 3, 2023, based on changes to reported dates of values as previous data was reported as 1 day in advance.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1952 to current year.

GAGE - Daily discharge determined from flow through turbines plus spillway flow when present. Datum of gage is NGVD of 1929 (levels by Corps of Engineers). Apr. 4, 1952, to Aug. 4, 1988, water-stage recorder; May 26, 1967, to Aug. 4, 1988, auxiliary water-stage recorder 4,800 ft upstream from base gage at same datum.

COOPERATION - Discharge records provided by Corps of Engineers at Chief Joseph Dam through the Corps of Engineers, Northwestern Division, Reservoir Control Center. The U.S. Geological Survey makes discharge measurements at this site during the year.

REMARKS - Flow regulated by numerous reservoirs. Feeder Canal diversion (station 12435500) for Columbia Basin project is used to irrigate approximately 600,000 acres in the United States. An additional 66,500 acres in Canada are irrigated by other diversions.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 495,800 ft³/s, June 11, 1961; maximum elevation, 792.20 ft, June 7, 1956; minimum observed discharge, 4,220 ft³/s, Mar. 22, 1966, elevation, 746.91 ft; minimum daily discharge, 22,300 ft³/s, Nov. 11, 1973.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - July 2013 to September 2015 (continuous record). October 2015 to current year (seasonal record, April 1 to November 15).

INSTRUMENTATION - Water temperature recorder with a 15-minute logging interval.

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD - Maximum, 20.3°C, September 16, 2013; minimum, 2.2°C, February 8, 2014.