"Uranium was discovered in Salamanca during the 1950s. Production commenced in 1974 at ENUSA's Fe mine, which grew to become the largest uranium mine in the Iberian Peninsula. It produced over 4000 tU. The mine closed in 2000 due to low uranium prices, though minor output continued to 2002 from decommissioning, and the mining areas have since been restored. One large pit and three small ones are involved." (Quoted from article)