Regulated area of the PPR flooding of Couze Chambon (63DDT19990006) approved on 22/12/2008 — Puy-de-Dôme

The territory covered by the P.P.R.I. is divided into orange and red zones. In all these areas, the existence of the hazard requires certain land use to be prohibited, but allows some work to be carried out. The orange zones They group the territories for which their urbanised character and the existence of a medium or low hazard allows urbanisation provided that vulnerability is not aggravated*. There are two orange zones: — zone O1, corresponding to the low hazard area, — zone O2, corresponding to medium hazard areas. In these areas: * new buildings whose characteristics take into account the risk may be allowed but under more restrictive conditions in zone O2 compared to zone O1; * the evolution of the existing building will aim to improve the current situation: people’s safety and demand for no increase in the economic cost of damage, The red zones They include the territories for which the main objective is: * for urbanised sectors, not to aggravate vulnerability, * for non-urbanised or weakly urbanised areas, to preserve flood expansion fields and flow conditions. There are three red areas: R1, R2 and R3 (with R3u sector corresponding to urban centres subject to a strong hazard). In these areas: * new constructions, installations and structures are in principle prohibited, except for exceptions1. * For the existing building, any development will aim to improve the current situation in terms of people’s safety* and no increase in the economic cost of damage. * In the R1 and R2 flood expansion zone, the increase in reception capacity is limited, with more restrictive conditions in the R2 zone. * In urbanised R3 areas, the objective is not to exacerbate vulnerability by avoiding increasing the number of people directly or indirectly exposed and in the R3u sector by avoiding increasing the number of people directly exposed.