If the safety of your systems and tunnels are 'certified` by German firm TÜV SÜD, Read This!!!
BBC reports that the mining dam which burst in Brazil killing 300 people...#39;s loyalty laid in who pays the money: the mining company owning the dam! And i...; Well tell it to 300 people killed in Brazil mining dam burst! https://www.bbc...Reply on topic: Kolkata: A city’s dream takes shape 33 metres below the Hooghly river
East-West Metro’s 28m-deep Esplanade station is now structurally complete https://timesofindia.indiatimes.com/city/kolkata/e-w-metro-ready-with-structure-of-countrys-second-deepest-metro-station-at-esplanade/articleshow/79357822.cmsDelta Conveyance Deep Drive - Building the Tunnel, Part 1: Nothing Boring About Boring Technology
https://www.youtube.com/watch?v=ENpOj5hZcsU https://water.ca.gov/News/Blog/2021/October/QA-Building-the-Tunnel
cover tunnel photo by: Matt Brown from London, England / CC BY
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