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Crews work on Bertha's cutting tools in cramped conditions. (WSDOT) Work crews spend hours in a hyperbaric chamber before they enter the front end of Bertha, and also on their way out to adapt to much higher pressures. (WSDOT) Crews work on Bertha's cutting tools in cramped conditions. (WSDOT) Work crews crawl through a hatch from a hyperbaric chamber to work on Bertha's cutterhead. (WSDOT) Crews work on Bertha's cutting tools in cramped conditions. (WSDOT) Crews work on Bertha's cutting tools in cramped conditions. (WSDOT) Crews work on Bertha's cutting tools in cramped conditions. (WSDOT)
Crews work in tight spots to perform maintenance on Bertha