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Water-Year Summary for Site 14013000

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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 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
14013000 MILL CREEK NEAR WALLA WALLA, WA
LOCATION - Lat 46°00'29", long 118°07'03" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.07, T.6 N., R.38 E., Walla Walla County, WA, Hydrologic Unit 17070102, on left bank 0.1 mi downstream from Railroad Canyon, 4.0 mi downstream from City of Walla Walla diversion dam, 4.4 mi upstream from Blue Creek, 11.5 mi southeast of Walla Walla, and at mile 21.2.
DRAINAGE AREA - 59.6 mi².
REVISIONS HISTORY - WSP 1398: 1946-48(M), 1950 (M). WSP 1935: 1959, drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1913 to September 1917, April to September 1938, October 1939 to September 1976, October 1979 to current year. Maximum discharge and occasional discharge measurements 1977-79.
GAGE - Water-stage recorder. Datum of gage is 1,995.85 ft above NGVD of 1929 (levels by U.S. Corps of Engineers). Prior to Oct. 1, 1938, nonrecording gages at about same site at different datums.
REMARKS - No regulation. City of Walla Walla diverts about 28 ft³/s 4.0 mi upstream from station for municipal use. Water temperatures March 1962 to July 1965. Sediment records March 1962 to July 1965. U.S. Geological Survey telephone at station.
  • Water Years 2014, 2015: Records are good.
  • Water Years 2016 to 2018: Records good except estimated daily discharges, which are poor.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Mar. 31 or Apr. 1, 1931, reached a discharge of about 11,000 ft³/s, based on slope-area measurement about 900 ft upstream at old City of Walla Walla diversion dam.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,350 ft³/s, Feb. 9, 1996, gage height, 20.43 ft, from rating curve extended above 1,600 ft³/s on basis of slope-area measurement of peak flow; minimum daily discharge, 9.5 ft³/s, Dec. 9, 10, 1972.