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SR 520 Bridge Replacement and HOV Project - Floating Pontoon Construction Gallery

Views of Hood Canal Floating Bridge pontoon constructions and float-out. The new SR 520 Floating Bridge pontoons will be constructed in a similar way. The construction site has not yet been selected.

There are eight photos in this photo gallery.

Pontoon Construction for the Hood Canal Bridge, Tacoma

 A red tower crane stands out against the Tacoma skyline  A view of the pontoon construction site from above.  Carpenters set up and install the first pontoon wall forms.
Graving Dock Skyline Pontoon Form


Pontoon Float-Out for the Hood Canal Bridge

 The day before float-out, crews make final preparations to float three finished pontoons out of the graving doc.  The first pontoon out of the graving dock.  A tug pulls the second pontoon out of the graving dock.  A tug pulls the third pontoon from the graving dock.  Water leaves the graving dock after pontoons are floated out.
Float-out
Prep
First
Pontoon
Towed
Second
Pontoon
Towed
Third
Pontoon
Towed
Float-out
Complete

See archive photos of the Evergreen Point Floating Bridge pontoons
and bridge deck under construction.