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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
12514400 COLUMBIA RIVER BELOW HWY 395 BRIDGE AT PASCO, WA
LOCATION - Lat 46°13'27", long 119°06'55" referenced to North American Datum of 1927, Franklin County, WA, Hydrologic Unit 17020016, located 231 ft. from the left bank 0.5 miles downstream of U.S. Highway 395 bridge, 6.1 mi downstream from mouth of Yakima River, 4.9 mi upstream from mouth of Snake River, and at mile 329.1
DRAINAGE AREA - 104,000 mi².
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2009 to September 2022 (seasonal records only). Seasonal records from April 2005 to September 2008, available in files of the Geological Survey Kennewick Field Office (USACE Walla Walla has data for April 1999 to September 2003).
PERIOD OF DAILY RECORD - WATER TEMPERATURE: April 2009 to September 2022 (seasonal records only).
TOTAL DISSOLVED GAS: April 2009 to September 2022 (seasonal records only).
INSTRUMENTATION - Water quality monitor with a 1-hour logging interval since 1999.
REMARKS - The USACE 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 recorded, 22.0°C, September 14, 2013; Minimum recorded, 3.8°C, March 11, 14 2011, March 8, 2012, but may have been higher or lower during periods of missing record.
TOTAL DISSOLVED GAS: Maximum recorded, 127 percent saturation, May 14, 15, 2018; Minimum recorded, 95 percent saturation, April 8, 9, 2013, but may have been higher or lower during periods of missing record.
