Hydroelectric power plant of Premadio – Alta Valtellina

Construction of main tunnel between the River Verva and the reservoir of the Cancano dam and 5 water intake (Verva – Viola – Minestra – Foscagno – Cadangola), with input tunnels.

Drainage work at the exit of the main tunnel, access and service roads and tidying up of the former Cave (Quarries) area.

The 14,000 lm long and Ø 3.30 tunnel is excavated with TBM and clad in prefabricated shells.