High-Water Mark Signs Coming to Some Jersey Shore Towns
As many as 100 high-water mark signs will be installed in prominent locations throughout Monmouth County to commemorate Hurricane Sandy’s flood inundation, officials announced.
According to a county release, the goal is to ensure the public remains diligent about undertaking long-term actions to protect themselves, properties, and communities.
Recovery Diva 
Great idea! People often select a building site or facility unaware of flooding history.
I think a permanent reminder is a good idea too. I can think of a small town in Maine where the high water marks were painted on buildings.