At least the trail doesn't extend into blackrock and lower cc. It's enough already to put a 10' sidewalk next to the river along upper cc. Lets bring lazy people to nature with a sidewalk?? No , bring them to nature with a trail, bicycle, or even a kayak!!
As far as temp bridges they will have to figure out something. The current locations will be swept away with higher water. Maybe jack then up with large construction blocks.
History will be kind to me, for I intend to write it.