Pond Boss Forums POND CONSTRUCTION Building a dam Living Below a dam

This is from memory.
I think there are 3 classifications of watersheds.
Can't recall if it's 1, 2, and 3 or a, b, and c or what.
Lowest classification would have no roads, houses or anything below it in the inundation area.
Middle classification would have a road or improvement below it.
Highest class would have threat of loss of life below the dam.
So if someone builds a house below a middle class dam it raises it to the highest hazard level dam. From what board members and inspectors have told me it would cost as much to reconstruct the dam to the high hazard level as it did to build it.
Don't know of any dams that the hazard classification has been changed on, but the watershed boards are worried.