Tidal ranges in the Pacific Northwest reach as high as 4.5 metres. Those who spend time on and near tidal waters are cognizant of the rapidly changing levels and regulate their activities accordingly.
Once a month the sun, moon and earth line up to produce a particularly high tide, a spring tide. About once a year or so, the the tide is higher than usual. This collection of photos contrasts the difference between the really high tides and tides between normal high and low.
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