We’ve discovered an odd concrete slab under our grass in the backyard. It’s 3×3′ and five inches deep. It’s too small to be a footer for a swingset or shed, in too weird a place to be for a BBQ or light fixture, the town says there was no septic or well here, so we’re hoping for bomb shelter, Jimmy Hoffa’s grave or the secret location of the cure for the zombie plague.
Which means we need to lift the damn thing up.
So I’m looking for recommendations on how to do it, what kind of levers and fulcrums are needed, lengths, materials, etc. So far we have four volunteers to work on it, and may have more.