Trapagaran is a town located in a valley called Trapaga. In fact Trapagaran in Basque means Valley of Trapaga. This town as many in the left side of the river is heavily industrialized and has many factories. One of those factories is Babcock Wilcox, no known as Babcock Borsig.
The zone has a lot of influence from mines nearby, in fact, that triggered the construction of a very developed railway system during the beggining of the twentieh century. This railway system is used to transport people once the mines have not mineral to offer any more.