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Reconnecting the SR 99 tunneling machine

Welders working for contractor Seattle Tunnel Partners reconnect sections of the SR 99 tunneling machine’s outer shield in this September 2015 photo. Learn more about the Alaskan Way Viaduct Replacement Program at www.alaskanwayviaduct.org or follow Bertha, the SR 99 tunneling machine, on Twitter @BerthaDigsSR99.

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Uploaded on September 18, 2015
Taken on September 10, 2015