Materiały konferencyjne SEP 2019

7 the dam in the current air required by the regulations, the excavations were cleaned up and pre- pared for presentation to tourists. The presentation of the excavation will be possible through the installation of a specially designed visor (window) in the dam, in which the lighting will be installed. Tourists will be able to safely get acquainted with old mining techniques, construc- tion of excavations and their equipment.