Climb through a perfectly carved tunnel above Cusco made directly into solid bedrock with unknown ...

Researchers in Sweden have discovered why concrete in underwater road tunnels can break down much faster than expected—and ...

With the Deep Rock Tunnel now fully functional ... water is now funneled through large drop shafts and sent into the 16-foot-diameter tunnel, which holds up to 850 million gallons of combined ...

Once completed, the Tonnelle Avenue site will have one of the shafts to launch two tunnel boring machines that will drill ...

[Photo/Xinhua] An undersea tunnel at a depth of 68 meters beneath ... on Wednesday after a tunnel boring machine broke through rock with a diameter of 14.57 meters, nearly as high as a five ...

Once completed, the Tonnelle Avenue site will have one of the shafts to launch two tunnel boring machines that will drill through rock in the Palisades. A separate shaft is being built at the ...