SR 99 Tunnel Update: Bertha’s Front End Reconnected
Significant work remains for crews tasked with reassembling the machine. Three large pieces of the machine’s outer shield will be lowered into place for reassembly in the coming days, according to STP’s most recent schedule. Crews also must weld the pieces back together, in addition to the lengthy task of reconnecting the hundreds of wires and hoses that are integral to the tunneling operation. STP and manufacturer Hitachi Zosen will conduct a series of tests following reassembly to ensure the machine is ready to resume mining.
The current schedule calls for tunneling to resume by the end of November 2015.
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