Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our mobile dedicated web site here.
Click to hideNews Bulletins

Water-Year Summary for Site 12322001

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
00060 Discharge(Mean)  

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

Print this page
USGS Water-Year Summary 2019
12322001 KOOTENAI RIVER AT PORTHILL, ID (TOTAL FLOW)
LOCATION - Lat 49°00'00", long 116°30'10" referenced to North American Datum of 1927, Boundary County, ID, Hydrologic Unit 17010104,
SURFACE-WATER RECORDS
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.