Dams in Pays de la Loire

Dams controlled by the Department of Safety of Hydraulic Works of the DREAL Pays de la Loire. There are four classes of dams: — class A: height of the structure greater than 20 m in relation to the natural terrain — class B: non A and h 10 m and 200 (V hold volume) — class C: no A or B and 5 m and 20 __Origin__ Data extracted for most of the SIOUH database (System d' information on hydraulic structures), a tool for monitoring the regulations put in place with the publication of Decree No. 2007-1735 and its decrees of #x27; application. Geolocation is carried out by DREAL Pays de la Loire on the basis of the Lambert coordinates indicated in the extraction. This information has been verified from the ortho BD of l'IGN and information from the pole in charge of dam monitoring. __Partner organisations__ DREAL Pays de la Loire [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/3a37483f3e1b160071d2b9718f99755eddd69f5c)