Mumbai-Ahmedabad High-Speed Rail Corridor: Nearly 7-km undersea tunnel at Thane Creek, situated in the inter-tidal zone, will be the first undersea rail tunnel in India. It is a part of a 21-km-long tunnel of Country's High-Speed Rail corridor that will connect the underground station at Bandra-Kurla Complex (BKC) to Shilphata in Maharashtra., Mumbai News, Times Now