Superlong Tunnels now and in the near future
• https://www.nextbigfuture.comThe Delaware Aqueduct is the longest tunnel that is currently in use. It was completed in 1945 and is 85 miles (135 kilometers) long.
The Delaware Aqueduct is the longest tunnel that is currently in use. It was completed in 1945 and is 85 miles (135 kilometers) long.