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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
12399500 COLUMBIA RIVER AT INTERNATIONAL BOUNDARY
LOCATION - Lat 49°00'03", long 117°37'42" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.04, T.40 N., R.41 E., Stevens County, WA, Hydrologic Unit 17020001, on left bank at international boundary, 0.5 mi downstream from Pend Oreille River, and at mile 745.0.
DRAINAGE AREA - 59,700 mi².
REVISIONS HISTORY - WSP 932: 1937(m), 1938(M), 1939(m).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1937 to current year. Prior to March 1938, monthly discharge only, published in WSP 1316.
GAGE - Water-stage recorder. Datum of gage is 1,200 ft above Mean Sea Level, U. S. Bureau of Reclamation 1937 adjustment, and 1202.84 ft above NAVD of 1988. Prior to Apr. 27, 1939, nonrecording gage at same site and datum. Since May 31, 1942, auxiliary water-stage recorder and Jan. 1 to May 30, 1942, auxiliary nonrecording gage 2.2 mi downstream from base gage at same datum.
COOPERATION - This station is maintained by the United States under agreement with Canada.
REMARKS - Flow regulated by numerous reservoirs. It was estimated that 436,400 acres were under irrigation in the United States in 1980 with diversions for irrigation of an additional 66,500 acres in Canada. U.S. Geological Survey satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1894 reached a stage of 1,346 ft, from information by Bureau of Reclamation, discharge, 680,000 ft³/s. A discharge of about 12,900 ft³/s occurred Jan. 30 or 31, 1937, based on information from other gaging stations, elevation, 1,287.9 ft, from rating curve extended below 1,291.6 ft and may have been as low in January 1930.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 550,100 ft³/s June 12, 1948, elevation, 1,338.13 ft; minimum discharge, 18,000 ft³/s Feb. 7, 1954, elevation, 1,289.38 ft.
