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Water-Year Summary for Site 12417650

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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
12417650 SPOKANE RIVER BELOW BLACKWELL ISLAND NEAR COEUR D' ALENE, ID
LOCATION - Lat 47°41'41", long 116°48'55" referenced to North American Datum of 1983, Kootenai County, ID, Hydrologic Unit 17010305, Coeur d' Alene quad., and at mile 109.9.
DRAINAGE AREA - 3,702 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2010 to July 21, 2014 published as 12417610 Spokane River below Lake Outlet at Coeur d' Alene, ID. July 22, 2014 to current year.
GAGE - Water stage recorder and acoustic Doppler velocity meter. Datum of gage is 2,100 ft above NAVD 88.
COOPERATION - Station is operated in cooperation with the U.S. Environmental Protection Agency.
REMARKS - Elevations are affected by backwater from Coeur d' Alene Lake.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 41,700 ft³/s Mar. 21, 2017; Maximum gage height, 33.96 ft Mar. 21, 2017; Minimum daily discharge, 564 ft³/s Aug. 8, 2015; Minimum gage height 21.12 ft multiple days between Mar. 2 - 19, 2019. (Stage dropped below pressurized line)