Lake Sammamish siteid=485 · WA
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Water level & flow 2014-01-01 .. 2026-09-16 · SWOT depth track + USGS NWIS gauges · one linked timeline
current depth
51 ft
drawdown
1.1 ft
below full pool
water level (depth)
98%
51 of
52 ft deep
water stored (volume)
86%
est. from bathymetry
measured
Sep 16
nwis_stage
pipeline refresh
2026-09-17 23:15 UTC
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elevation trend: robust smoothing + outlier removal · raw value on hover
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Inflow / outflow USGS NWIS daily discharge · same timeline as above
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