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Water-Year Summary for Site 12426000

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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 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12426000 SPOKANE RIVER BELOW NINE MILE DAM AT SPOKANE, WA
LOCATION - Lat 47°46'50", long 117°32'40" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.06, T.26 N., R.42 E., Spokane County, WA, Hydrologic Unit 17010307, 0.5 mi downstream from Nine-Mile Dam, 1.25 mi upstream from Little Spokane River, and 9.5 mi northwest of Spokane.
DRAINAGE AREA - 5,220 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1948 to September 1950 (continuous-record gaging station), November to December 1951, August 2005 (discharge measurements only).  June 2, 2016 to current year (continuous-record gaging station).
GAGE - Water-stage recorder.  Elevation of gage is 1,550 ft. above NGVD of 1929.
REMARKS - Flow regulated by powerplants of Avista Corp. at Post Falls, Idaho approximately 35 miles upstream and in Spokane at Nine Mile Dam, approximately 1 mile upstream.  U.S. Geological Survey satellite telemeter at station. 
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 44,400 ft³/s, Mar. 21, 2017; minimum, 296 ft³/s, Sept. 14, 1948.