BB this is a little classic, the Jims man who does our lawn and our next door neighbours, in doing the edges over the years had dug trenches about 6 inches deep against all the concrete. My wife fell over in one so I had to tell him not to do the edges and I filled them up with soil. About a month later the neighbour fell over in the ones at her place. The Jims man obligingly got soil from the garden supply, filled in the trenches and gave her a bill for it. Gotta laugh