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 out in galleries.
For safety reasons, the following repair works were carried out:
- Repair of gables and roof of galleries.
- Reinforcement of the support with trusses, triple torsion mesh and corrugated steel bolts.
The pumping station was also relocated.
