Restricted area of the R111-3 de Pont du Château (63DDT19880005) approved on 05-01-1988 — Puy-de-Dôme

For natural PPRs, the environmental code defines two categories of zones (L562-1): risk-exposed areas and areas that are not directly exposed to risks but where measures may be foreseen to avoid exacerbating the risk. Depending on the hazard level, each area is subject to an enforceable settlement. The risk perimeter R111-3 movement of terrain of Pont du Château consists of 2 zones: — internal perimeter: corresponds to the area of mining increased by an influence zone calculated at an angle of 35° to the vertical; it is the area where the risk of subsidence is highest. — external perimeter: corresponds to reconnaissance galleries. Risk of less subsidence than in the internal perimeter. Authorised constructions with prescription