From ancient times till this day on water has been and is the greatest danger to the salt mine. Penetrating into the mine it dissolves salt. The greatest water catastrophes took place in the 19th century in the Kloski traverse and Colloredo corridor. In 1992 a battle was fought with a huge flood endangering the town and the mine, reaching the 20,000 litres of water per minute 175 metres below the underground. Original wooden gutters preserved in Kunegunda traverse served to drain underground waters. The water was collected in enormous vats from where it was further transported to special containers. The water was then hauled from the shaft bottom to the surface in leather sacks called bulgi in wooden buckets.
Also manual pomps were used called pater noster .
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