Deep Tunnel (Hercherhof)

The Deep Tunnel (German: Tiefer Stollen) is an adit at Hercherhof near Freiburg, Germany.

It construction was part of the Four Year Plan, an economic plan designed to prepare Nazi Germany for war, and Hermann Göring's name was invoked in a dispute between the mining company and the state environmental protection agency when the agency requested the greening of excavated material.

[1] It should replace the existing goods cable lift near the railway to secure the transport via Freiburg and then to the Stolberg Zink AG in Pforzheim for further processing.

This underground construction is part of a larger medieval silver mine in the Schauinsland mountain near Freiburg in Breisgau, a relic of the last war effort to extract zinc and lead ore from this area.

The planned extension to the northern ore dressing part was not completed i.e. 300 m remains unaccomplished.

This part of the Schauinsland mining complex is not available to the public
Checking the back area partially buried