contractor of this project is ministry of road and transportation – national transportation infrastructures development and building company .this project of bedding of Ardebil – mianeh railway , part 3 / A with length of 6/9 km as one –line and with ended width of 6m includes operation of excavation and mountain excavation , building 20 sets of bridge and technical buildings , one set of large valley bridge with length of ۲۸۰ m and run ۳۵۰ m of curtain wall of reinforced concrete with height of 2 to 12 m and build 9 sets of tunnel with section of horseshoe with total length of 3424 m .
