Before making any repairs, be sure the unit is unplugged and tank has no air. To remove the line and load cords from the pressure switch, the pressure switch cover will need to be removed. Use your Phillips head screwdriver to loosen the screw located either on the top or on the side of the cover.
[pdf] It was made by Hitachi Zosen Sakai Works in Osaka, Japan, and the machine's assembly was completed in Seattle in June 2013. Tunnel boring began on July 30, 2013, with the machine originally scheduled to complete the tunnel in December 2015.OverviewBertha was a 57.5-foot-diameter (17.5 m) built specifically for the 's (WSDOT) project in ,. .
The name Bertha, after Seattle's first female mayor, , was chosen by a panel (that included the Governor and Transportation Secretary) from 150 submissions from kindergarten through 12t.
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