Meacher Street Mount Druitt Sign

This is a sign that I may need some help in understanding. No, I do understand what the sign reads and message it is sending to the community. My problem is, is it placed in the wrong place as the sign is from far this overgrown grasslands, where

is a high fence surrounding an empty bloc k of land. It appears it is waiting for development for medium density housing.

Is the soil erosion, caused by the overgrown grass? Or is it something else?
I just couldn't see the storm water drain there, unless someone can point myself in the right direction!