I buried the entire concrete apron of a 16x32 in ground pool, plus the diving board in a couple holes at my old house. I broke it up with a jack hammer I rented from Home Depot. I paid a buddy with a backhoe about $250 cash for three hours of work with his machine.
I planted some spruce trees on top of the holes.
I had quotes of over $2500 to haul the material away.
My father buried an apartment complex in Houston, which I’m sure was highly illegal even in the late 60s.
Yep! The only thing is to bury it very deep, or the grass won’t grow on top of it. Sounds like you did the right depth, if you’ve got trees growing on yours!
I buried an old house in a pit in our pasture. The house was rendered uninhabitable by a flood a few years before we bought the property. I hired a bulldozer to knock it down and to dig a pit to bury it. We used the concrete debris to build a retaining wall. The rest went into the pit.
I planted a Texas Oak tree on top so I would remember where the pit was. 25 years later the tree is over 30 feet tall.