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Home2016October

Month: October 2016

Project Related

The Building Blocks of the SR 99 Tunnel

October 2, 2016 rockman Comments Off on The Building Blocks of the SR 99 Tunnel

The tunnel liner that is being placed by the Bertha tunnel boring machine consists of precast concrete segments. This video by the WSDOT shows how they are made at the casting yard, and what Bertha […]

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