The old culvert was rusted through in multiple places and caving in on one end.
The rock screen works good. The amount of wet clay I have, makes the steep angle necessary. The wire is 2x4 welded wire. I'm also playing with laying a 2x2 screen across the top section. This should give me a peel off section to toss the roots aside. Even with the steep angle, I still had to use a rake to get wet clay to travel down it.