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Water-Year Summary for Site 12431000

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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
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 47°47'05", long 117°24'12" referenced to North American Datum of 1927, in sec.05, T.26 N., R.43 E., Spokane County, WA, Hydrologic Unit 17010308, on left bank 50 ft upstream from county bridge, 0.5 mi east of Dartford, 1.7 mi downstream from Deadman Creek, 7.5 mi north of Spokane, and at mile 11.4.
DRAINAGE AREA - 665 mi².
REVISIONS HISTORY - WSP 1216: Drainage area. WSP 1286: 1930, 1932(M), 1947-49(M). WSP 1446: 1951(M).
PERIOD OF RECORD - April 1929 to September 1932, December 1946 to current year. Chemical analyses, July 1960 to September 1970; water temperatures, July 1968 to September 1970.
GAGE - Water-stage recorder. Datum of gage is 1589.709 NAVD88 (GNSS Survey using a IG4 May14, 2021). Datum of gage was 1,585.62 ft above NGVD of 1929 (levels by Washington State Department of Transportation). Prior to 1996 an arbitrary datum of 1,590 ft was used, from topographic map. Prior to Mar. 16, 1951, nonrecording gage and Mar. 16, 1951, to July 5, 1961, water-stage recorder, at site 0.5 mi downstream at different datum.
REMARKS - No regulation. Small diversions for irrigation upstream from station. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,110 ft³/s, Mar. 21, 1997, gage height, 8.27 ft; minimum discharge, 59 ft³/s, Dec. 7, 2009, result of freezeup.