I read this today. Most interesting.
https://telanganatoday.com/japans-underground-flood-control-tunnel
Tokyo, one of the densest cities on the planet, is home to one of the most ambitious and enormous flood-control systems ever created
Amazing. Japan has the most advanced technology in tunnel construction.
https://telanganatoday.com/japans-underground-flood-control-tunnel
Japan’s underground flood control tunnel
telanganatoday.comTokyo, one of the densest cities on the planet, is home to one of the most ambitious and enormous flood-control systems ever created