"Mining in the Fresnillo district was started in 1554 by Diego Fernandez de Proano. Several mines, located mostly on the foothills of Fresnillo Hills, produced silver between 1682 and 1757. The mine workings extended to a depth of 50 m where they intersected groundwater and began to flood."

 

 

Read the IM's Proano (Fresnillo) review.