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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.
USGS Water-Year Summary 2024
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.
