Joe Woosman
Member
Bill,
Great idea! The concrete would cause some extra mirage. I think the ditch is going on 5 years with no movement yet. We do have a few 24 inch 2x4s cut and placed for bracing in the top of the ditch!
Bart
Just a thought.. If the walls were formed with a notch at the top for steel grates to rest in it, you could drive/walk over it and they would keep the walls from moving towards each other. They could possibly provide a little shade and reduce mirage too? Maybe reduce some wind turbulance??? Now, after the fact, you might be able to anchor angle iron to the top of the walls, set the grates in between, then add topsoil to elevate to the top of the grates.