An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to ...

Yet only a few ever saw the elaborate system of service tunnels that ... face demolition as early as this summer. The underground tunnels opened with the mall in 1954 and were primarily ...

That data gave them a better understanding of where to use ground-penetrating radar to create a more specific map of the ... believe that the tunnel system was an underground representation ...

You have no idea how big the tunnel system is or how small ... like robots that can explore and map tunnel systems, and communication devices that can work underground. But Richemond-Barak says ...

Nashville's District Energy System is more than 50 years old and pumps chilled water and steam to more than 40 buildings through an underground tunnel network. Metro Council member Olivia Hill ...

11-foot diameter tunnel will come in handy during winter weather. The West Gates Pond Expansion project is a major upgrade to the aircraft deicing fluid collection system. The project creates ...