User:Rdodhia/Big Bertha (Tunnel Boring Machine)
Appearance
![]() | This is not a Wikipedia article: It is an individual user's work-in-progress page, and may be incomplete and/or unreliable. For guidance on developing this draft, see Wikipedia:So you made a userspace draft. Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Big Bertha (Tunnel Boring Machine) As of July 2013, Big Bertha was the biggest tunnel boring machine in the world. Built by Hitachi Zosen Sakai Works in Osaka for Seattle's SR99 Tunnel Project, the machine completed assembly in Seattle in June 2013.
References
[edit]External links
[edit]