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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.
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USGS Water-Year Summary 2024
14019240 COLUMBIA RIVER BELOW MCNARY DAM NEAR UMATILLA, OR
LOCATION - Lat 45°56'00.96", long 119°19'30.89" referenced to North American Datum of 1927, Benton County, WA, Hydrologic Unit 17070101, on right bank 1.3 mi below McNary Dam on the Columbia River, 1.5 mi northeast of the town of Umatilla, at mile 290.7
DRAINAGE AREA - 214,000 mi²
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - October 2009 to curent year. Data from 1995 to September 2003 are available from the U.S. Army Corps of Engineers Walla Walla office, and data from October 2003 to October 2022 are available from the USGS Kennewick field office.
INSTRUMENTATION - Water quality monitor since 1995, with a 1-hour logging interval since October 2003.
REMARKS - The Corps manages spill levels for fish passage to avoid exceeding 120% total dissolved gas (TDG) in project tailraces, and 115% TDG in the forebay of the next project downstream consistent with the current percent TDG limits.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum, 22.5°C, July 11-12, 2015 ; Minimum, 1.4°C, Feb. 13, 2019, but may have been higher or lower during periods of missing record.
TOTAL DISSOLVED GAS: Maximum, 140 percent saturation, June 8, 2011; Minimum, 94 percent saturation, many days, but may have been higher or lower during periods of missing record.
