Since it's tax dollars involved when Kansas W&P installs trees they publicize the coordinates as well.

The PVC habitat is working well. It never degrades, plus, it withstands the weight of zebra mussels much better than small tree limbs. We have "lost" some of our long-time fav piles that have compressed downward due to mussel loading.

I believe M-Made habitat can be overdone. In the old days at Perry, the fish would gather and stack in huge numbers on the river channels making it like fishing in a barrel----nothing to get hung up on.
But my oh my has that changed. Take Perry for instance where some areas have piles 10 feet apart for 150 yard stretches. It tends to spread out the fish population so that some days a guy has to hop onto many, many piles to get numbers. Additionally, this time of year when the fish are scattered horizontally we stroll (very slow troll @ .20 MPH) which in the overly "pile-littered areas" we spend more time tying on jigs than we do fishing. Walleye and catfish drifters, along with white bass "casters" do not consider habitat builders as their buddies