There's no way to do that safely without going at least 7'' above the sidewalk. Why don't you just go under it? You could start from the basement to dig a hole the other side of the sidewalk.
I hope that you meant 7 feet, not 7 inches.There's no way to do that safely without going at least 7'' above the sidewalk. Why don't you just go under it? You could start from the basement to dig a hole the other side of the sidewalk.