In the early 1900s, following a new attempt to resume mining operations, new facilities were built in Valpelline on the left orographic bank of the stream.
Between 1905 and 1906, construction began on a large shaft furnace with fourteen tuyeres, capable of processing 60 tons of material daily. The ore was processed using the German method of roasting and reduction in shaft furnaces. The small ovens and roasting furnaces were connected to a chimney backed against the mountain, which allowed the sulfur dioxide to be carried to a height of about 100 meters from the foundry floor.
During the period of mining exploitation, the Pompillard stream, which passes near the foundries, was used for the water supply of the facilities. The route, still visible today, follows the footprint of the canal and allows direct connection to the Quart foundries where, on lands owned by Count Perrone, workshops for the further processing of the extracted material were built.
