State Route 520 Marine Information
To schedule a drawspan opening, please call 206-440-4490. No drawspan openings are allowed on weekdays between 5 a.m. and 9 p.m.
The west navigation channel, shown above, has an estimated water depth of 30' at the center of the channel.
The East navigation channel, shown above, has an estimated water depth of 39' at the center of the channel.
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