Nagorny tunnel

Construction date	1975 - 1979
Placed into commission	1980
Length of tunnel	1353,7 m
Tunnel section	62,2 m2
Tunneling method	Drill and blast method
Lining	Tunnel: cast-in-situ reinforced concrete
Location	Far East railway, Berkakit-Tynda section
Location map

General information

Nagorny tunnel is the first Russian railway tunnel headed in permafrost ground. It is situated in the zone of high-temperature permafrost. Seismic activity of the area is 8 points. Preliminary design and design drawings for the tunnel construction were performed by “Lenmetrohyprotrans”.