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Water-Year Summary for Site 12322001

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  • 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.
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Available Parameters
00060 Discharge(Mean)  

Water year 2019: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2019
LOCATION - Lat 49°00'00", long 116°30'10" referenced to North American Datum of 1927, Boundary County, ID, Hydrologic Unit 17010104,
PERIOD OF RECORD - April 1928 to current year.
REMARKS - Daily discharge represents entire flow passing the international boundary. This record gives total flow of Kootenai River at Porthill, ID (12322000) and Boundary Creek (12321500). Formerly published under Site ID 12322000. From October 1989 to December 2003 computations were made using USGS Branch model. Beginning Jan. 2004, velocity data from an acoustic doppler velocity meter (ADVM) has been used to compute the discharge record. Flow regulated by Libby Dam started on Mar. 21, 1972.
  • Water Year 2014: Records fair.
  • Water Year 2015: Records fair.
  • EXTREMES FOR PERIOD OF RECORD - UNREGULATED PERIOD (1929-71): Maximum daily discharge prior to regulation by Libby Dam, 125,000 ft³/s June 1, 1948; maximum elevation, 1,767.61 ft, June 7, 1961; minimum daily discharge, 1,380 ft³/s Feb. 8, 1936; minimum elevation, 1,738.21 ft, Apr. 3, 1944. REGULATED PERIOD (1972 to current year): Maximum daily discharge since regulation began, 62,700 ft³/s June 20, 2006, maximum elevation, 1,758.84 ft, June 2, 1972; minimum daily discharge, 2,610 ft³/s Jan. 9, 1973.