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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
13343590 LOWER GRANITE LAKE FOREBAY AT LOWER GRANITE DAM, WA
LOCATION - Lat 46°39'34", long 117°25'31" referenced to North American Datum of 1927, Whitman County, WA, Hydrologic Unit 17060107, on Lower Granite Dam on the Snake river, 12.5 miles southwest of the town of Pullman Wa, at mile 107.5
DRAINAGE AREA - Not determined.
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2009 to September 2022 (seasonal records only). USACE Walla Walla has data for April 1985 to September 2003. Seasonal records from April 2004 to September 2008, available in files of the U.S. Geological Survey Kennewick Field Office.
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 1-hour logging interval.
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, 22.2°C, August 4, 2021 and August 31, 2022; Minimum recorded, 4.0°C, March 3, 4, 2012, but may have been higher or lower during periods of missing record.
TOTAL DISSOLVED GAS: Maximum recorded, 110 percent saturation, June 09, 2010 and June 27, 2011; Minimum, 95 percent saturation, Sept. 30, 2009, but may have been higher or lower during periods of missing record.
