The image shows the entrance (portal)
of the Ruperti adit, which was started
in 1892 at an elevation of 1268 meters.
Four years later, at the same elevation
on the eastern side of Hochkeil, the Virgil
adit was started. On February 17, 1911, the
breakthrough (connection) took place, and
the total length of the two adits was now
6685 meters.
The Ruperti adit was the 3rd level (level)
of this mine, which, at its closure in 1977,
had a total of 11 levels and almost as many
intermediate levels (height difference
approx. 40 m), as well as a total of 42 km
of haulage drifts.
A milestone in Mühlbach‘s mining history
was the breakthrough in August 1917
through the main shaft to the Emili adit
located 400 meters lower. This allowed
the transport of ore through the mountain
to the processing plant in Mühlbach. Until
around 1955, the Ruperti adit, alongside
the Emili adit, was one of the most
significant adit systems on Mitterberg.
Today, the spring in the Ruperti adit is part
of the drinking water supply for Mühlbach
am Hochkönig.