These shelters were mainly constructed by forced labor from the Arbeitslager Reichenau in Innsbruck. 25 underground shelters with a total length of 11.2 km and space for 28,755 civilians were built in 1944.
The majority of these shelters were built using forced labor from the Arbeitslager Reichenau in Innsbruck. A total of 25 underground shelters with a combined length of 11.2 kilometers and space for 28,755 civilians were constructed during that year.