Another Set Of Pontoons For New 520 Bridge Ready
The Tacoma-built floating concrete sections each measuring about 100 feet long and 50-60 feet wide will provide extra stability for the roadway pontoons.
The new bridge will be six lanes wide and two lanes wider than the bridge it will replace. The completed bridge will be made up of 77 pontoons - 33 forming the roadway and 44 built in Tacoma to provide additional buoyancy.
Those pontoons will be bolted to the main structure outboard of the roadway sections.
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