To rebuild the bridge one must collect 20 "bridge material" and deliver those to the builder. The material can be found on the nodes around the bridge, instead of battles. Luck skill might help...
The bridge to Brokin Road Island has been broken for far too long. Talk to the friendly bridge builder and see if you can help rebuild the broken bridge. But the bridge will not be fixed as they are still working on the next area
Exceptional Junk: Polished Wood