According to the specs no rocks bigger than 1" in diameter can be back filled against the pipe. This is to prevent any rocks rubbing against the pipe during periods of freeze-thaws. They accomplish this task by placing a wire mesh over the ditch and back filling by hand. Any rocks that are captured are hauled off to our dump.
The picture of the course is from the map in the foyer next to the Audubon Bulletin. It shows how far we have come. I would say we are not quite half way, but close. I update the map as needed, so you can get a quick view of where they are working and what is left. Blue lines are completed mains and green lines mean sprinklers are installed.
|Too many rocks behind 6 green.|
|installing 14 inch main, white pipe is our main that they had to go under.|
|Wire mesh is placed over ditch so rocks are not placed next to pipe when they back fill|
|Almost half way !!!!|