Because I don't know where the bridge is, and I don't know the origin of the bridge, I can only guess. You can compare it and see what it is like:
1. If it is at the source of a water system and the bridge is an ancient bridge, it may mean the following:
Help means along, next to and adjacent to. Fuyuan means that the bridge is built along the source. This is the meaning of ancient Chinese, such as "helping the road", which is the usage of helping.
If the bridge is new, it may mean:
Help means support and help. Fuyuan, which means Fuyuan, is to commemorate those who help and support local life.