The Toses tunnel has a length of 3,904 m and is located between PP.KK 29+745 and 33+649. The repair areas total 947 meters where the following actions have been carried […]
The Bodovalle mine was the largest open-pit siderite mine in the Biscayan mining basin. It was exploited in open pit until 1885. From that date, the mineral extraction was carried […]
