planned tunnel size:
60 000-75 000 m²
planned tunnel:
10 main tunnels (A-J)
23 crossways
completed tunnel:
1. level:
7 main tunnels (A-G)
15 crossways
2. level
1 main tunnel (H)
started crosscut
start of construction: spring 1944
concentration camp prisoners: about 15 000
alone in concentration camp Melk/Quartz B9 harrowing killed:
about 5 000 concentration camp prisoners
height of the tunnel:
1,5 m to 12 m
depending on the configuration