ewest, here's my update...
I've tried to connect the highways' placing structure and cover as you suggested. I've substituted rock piles for brush, wood, and pallets where possible because the former will last longer. For the submerged islands, I've put gravel on top. The soil is mostly red clay so I believe I can shape the islands using a track loader with flats to support three separate rock piles. An illustration of the island is attached along with the updated concept drawing of the pond.
Do you know if FHM will use the undersides of lilies for spawning or do they need something more substantial (as in pallets)?
Any more thoughts?
