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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
14015350 MILL CREEK AT LAST CHANCE ROAD BRIDGE NEAR COLLEGE PLACE, WA
LOCATION - Lat 46°03'04.56", long 118°27'01.81" referenced to North American Datum of 1983, in sec.28, T.7 N., R.35 E., Walla Walla County, WA, Hydrologic Unit 17070102,
DRAINAGE AREA - 109.27 mi²
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 2021 to current year.
GAGE - Water-stage recorder. Datum of gage is 649.11 ft above NAVD88 (USGS GNSS, May 30, 2024).
COOPERATION - U.S. Geological Survey and the Confederated Tribes of the Umatilla Indian Reservation.
REMARKS - Upstream regulations and diversions are controlled by the U.S. Army Corps of Engineers for flood control and the City of Walla Walla for municipal water use.
EXTREMES FOR PERIOD OF RECORD - Maximum 2480 ft³/s, gage height 11.53 ft. May 7, 2022; minimum 0.06 ft³/s July 17, 2021.
