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Discharge or Outflow Areas
Snoqualmie Confluence:
Groundwater discharges to the Snoqualmie River along at the confluence of the Middle, North and South Forks. Estimates of the magnitude of groundwater discharge are in the range of 50 to 75 cfs, based on an analysis of streamflow between 1961 and 1971 (when gages on all forks of the Snoqualmie were active).
Lake Alice Plateau/Tokul Creek:
Some groundwater leaves the upper Snoqualmie Basin as downvalley flow that by-passes Snoqualmie Falls. Two deep channels are present on either side of Snoqualmie Falls, one beneath the Lake Alice Plateau and one beneath the Tokul Delta. It is estimated that outflow ranges between 10 and 20 cfs annually.
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©2003-2007 Golder Associates
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