USGS Water-Year Summary 2020
12422500 SPOKANE RIVER AT SPOKANE, WA
LOCATION - Lat 47°39'34", long 117°26'53" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 SW 1/4 sec.13, T.25 N., R.42 E., Spokane County, WA, Hydrologic Unit 17010305, on right bank at Cochran Street in Spokane, 0.5 mi upstream from Hangman Creek, and at mile 72.9.
DRAINAGE AREA - 4,290 mi². of which about 122 mi² in the vicinity of Hayden Lake is noncontributing to this station.
- WSP 532: 1891-1904. WSP 1246: Drainage area. WSP 1286: 1907-09.
PERIOD OF RECORD - April 1891 to current year.
Chemical analyses October 1972 to September 1973.
GAGE - Water-stage recorder. Elevation of gage is 1,697 ft above NGVD of 1929 (river-profile survey). Prior to July 1, 1921, water-stage recorders and nonrecording gages at several sites within 4 mi of present site at various datums.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 49,000 ft³/s, estimated, May 31, 1894 (see WSP 532); minimum, 49.7 ft³/s Aug. 26, 1991, due to regulation for construction at Post Street Dam, but may have been lower during periods of missing record in 1991.