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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
13352595 LAKE H G WEST FOREBAY AT LOWER MONUMENTAL DAM, WA
LOCATION - Lat 46°33'46", long 118°32'00" referenced to North American Datum of 1927, Franklin County, WA, Hydrologic Unit 17060110, on Lower Monumental Dam on the Snake River, six mi south of the town of Kahlotus WA, at mile 41.7
DRAINAGE AREA - Not determined.
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2009 to current year (seasonal records only). Seasonal records from April 2005 to September 2008, available in files of the Geological Survey Kennewick Field Office.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: April 2009 to current year (seasonal records only).
TOTAL DISSOLVED GAS: April 2009 to current year (seasonal records only).
INSTRUMENTATION - Water quality monitor with a 1-hour logging interval since 2005.
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, 22.5°C, August 18, 2021; Minimum, 3.0°C, March 13, 2019, but may have been higher or lower during periods of missing record.
TOTAL DISSOLVED GAS: Maximum, 140 percent saturation, August 25, 27, 28, 2011; Minimum, 93 percent saturation, October 15, 2018, but may have been higher or lower during periods of missing record.
