In fairness, once subgrade was lost, not much would stay. Probably not normally reinforced concrete. It looks to be a fairly thin section, probably, from appearances, around 8"


Democracy is not freedom. Democracy is two wolves and a lamb voting on what to eat for lunch. Freedom comes from the recognition of certain rights which may not be taken, not even by a 99% vote.
*Marvin Simkin* L.A. Times (1992)