The Maharashtra Metro Rail Corporation Limited (MahaMetro) started the operation of the Tunnel Boring Machine (TBM) to bore the second tunnel from Swargate towards Mandai. The depth of the tunnel is 18 meters (Times of India)
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https://timesofindia.indiatimes.com/city/pune/excavation-of-metros-2nd-tunnel-in-swargate-begins/articleshow/86517352.cms
Excavation of Metro’s 2nd tunnel in Swargate begins | Pune News - Times of India
timesofindia.indiatimes.comPune: The Maharashtra Metro Rail Corporation Limited (MahaMetro) on Saturday pressed a tunnel-boring machine (TBM) into service to dig the second tunn.