The Mori-Torbole Tunnel is a diversion tunnel completed in 1959 between the Italian towns of Mori and Nago-Torbole to connect the Adige river with Lake Garda.
Its function is to reduce water levels in the river upstream of the province of Verona by discharging excess water into the lake. The tunnel reduces the risk of flooding in Verona and environs from once every seventy years to once every two centuries.
To increase the level of Lake Garda by 1 cm, the tunnel must divert about 3,700,000 m³ of water.
Wikipedia https://en.wikipedia.org/wiki/Mori-Torbole_tunnel
Coordinates 45°51'50.075" N 10°56'20.352" E
