The historic Sutton suspension bridge near Middlemarch has been destroyed by the flood.
Strath Taieri Community Board chairman Barry Williams said the extensive damage to the bridge, which opened in 1875, was "devastating".
The bridge had been restricted to five-tonne vehicles since mid-2015 because of its state of repair.
Repair work by the Dunedin City Council resulted in the bridge being able to take trucks weighing up to 19.5 tonnes from last month.