PPR subsidence- collapse of underground cavities — Châlons-en-Champagne sector — perimeter of the RPP

This dataset contains the boundaries of the development of the cavity PPR. The characteristic of that perimeter is to be the consequence of an official act and to produce its effect from the date of limitation set out in the Prefectural Decree of 07 June 2001, as amended by prefectural decree of 26 February 2015 and extended by order of 24 August 2018. Genealogy: The perimeter of the prescribed PPR cavity is provided in the Prefect’s prescription order. The regulated scope corresponds to the geometric aggregation of all the restricted areas included in the same RPP. The scope of the study corresponds to the envelope in which the hazards were studied.