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Water-Year Summary for Site 13290460

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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.
  • 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
00065 Gage height(Mean)  

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

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USGS Water-Year Summary 2019
13290460 SNAKE RIVER AT JOHNSON BAR, IDAHO-OREGON STATE LINE
LOCATION - Lat 45°27'48", long 116°33'23" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 sec.22, T.1 S., R.50 E., Wallowa County, OR, Hydrologic Unit 17060101, Old Timer Mountain (ID,OR) quad., Hells Canyon National Recreation Area, on left bank opposite lower end of Johnson Bar, 0.5 mi upstream from mouth of Sheep Creek, and at mile 229.9.
DRAINAGE AREA - 73,400 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1959 to September 1992 (gage heights only), October 1992 to September 1995 (discharge), October 1995 to current year (gage heights only).
GAGE - Water-stage recorder. Datum of gage is 1,246.63 ft above NGVD of 1929 (revised). Published datum prior to 2010 water year is 20.39 ft lower.
COOPERATION - Gage-height records furnished by Idaho Power and reviewed by U.S. Geological Survey beginning April 2001.
REMARKS - Diurnal fluctuations in stage are caused by Hells Canyon Powerplant. Records for years prior to the 1991 water year were not published, but are available from the USGS Boise Field Office.