The project involves the construction of a long-term transmission tunnel for the Gavoshan dam downstream and four related access tunnels.
The most prominent feature of this project is the tallest tunnel being built by the country in its time and the first experiences of using the Tunnel Digger (TBM) in the country.
Tunnel Length: 20.2 Km
Number and length of access tunnels: 4 lines 3713 meters long
Diamond of drilling of the tunnel: 5.5 meters
Tunnel diameter: 4/3 and 4/8 meters
Total drilling volume: 504000 m 3
Concrete total volume: 130,000 cubic meters