[HIGHLIGHTS] The challenge of the Metro tunnel between Villaverde and El Casar: 2.7 kilometers without a tunnel boring machine, crystallized plaster walls and a pace of 80 meters per month

The challenge of the Metro tunnel between Villaverde and El Casar: 2.7 kilometers without a tunnel boring machine, crystallized plaster walls and a pace of 80 meters per month. The Basque CAF is left alone in the bid for the mega contract to manufacture the new Madrid Metro trains.

From its discreet wooden chapel nestled in the vault of the tunnel, almost 20 meters deep, it watches over the group of miners, pickaxes, who do not stop scratching the earth.