Under wraps: #Sydney's first rail #tunnel dug beneath harbour.
The giant tunnel boring machine named Kathleen has completed digging the first rail tunnel under Sydney Harbour for a new metro train line.
https://www.smh.com.au/national/nsw/under-wraps-sydney-s-first-rail-tunnel-dug-beneath-harbour-20191121-p53cs3.html
#Australia #tunnelling #tunnels
Without any public fanfare, a giant tunnel boring machine has completed digging the first rail tunnel under Sydney Harbour for a new metro train line.
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cover tunnel photo by: Matt Brown from London, England / CC BY
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