Looking back at Bertha

In this March 2016 photo, you are looking north toward the back end of Bertha, the SR 99 tunneling machine. The steel hooks on both sides of the circular wall of the tunnel will become part of the foundation that will support the decks and walls of the future roadway inside the tunnel. Learn more about the Alaskan Way Viaduct Replacement Program at www.alaskanwayviaduct.org or follow Bertha on Twitter @BerthaDigsSR99.

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