The conclusion of the regional mission of the environmental protection authority (MRAe) regarding the mining restoration and quarry expansion project carried out by the company Imerys in Ploemer (Morbian) has been provided. He intervenes at the investigation stage of the environmental permit application before the public investigation.
We remind you that this conclusion does not concern the compliance of the project, but the quality of the presented environmental assessment and the consideration of the environment in the project. Therefore, it is neither favorable nor unfavorable, but aimed at promoting public participation for its betterment. Therefore, it will be sent to the customer for inclusion in the public request file.
The environmental service found several problems. In particular, the preservation of the quality of aquatic environments (surface and underground water), the protection of ecosystems, the preservation of the habitat of the local population, as well as the quality of the final reconstruction from an ecological and landscape point of view.
In his opinion, MRAe indicates this
“the choice of the selected project is unfounded. The file states that several versions of the extensions have been investigated and some of them are presented, but no comparative environmental impact analysis has been performed to demonstrate the appropriateness of the choices made. Although most of the issues have been addressed, certain research weaknesses should sometimes be noted in the specific studies proposed in the appendix.’.
Imeris built a new processing plant to allow exploitation of the lower deposit. MRAe recommends, for example, present in an impact study an analysis of the impact its construction may have had on the environment.
Water, the main problem
The hydrographic network around the quarry is also in the center of attention of the environmental department. MRAe recommends assessing the ecological status of the surrounding watercourses and characterizing the impact of the quarry on aquatic biodiversity. This will allow better identification of avoidance and reduction measures to be implemented.
The conclusion also mentions wetlands.
Additional compensation measures must be planned so that compensation is effective for any project impact […] If this is not possible, the project must avoid wetlands. With regard to groundwater, the conclusion states that
the study concludes without explanation that the project will have negligible or reversible effects on groundwater and surrounding structures, but fails to demonstrate this, particularly with respect to the effects of mixing fresh and salt water..
Take care of the animal and plant life
In addition, it is recommended to substantiate the relevance of measures to compensate and support deforestation, in particular to ensure their effectiveness in relation to bird and bat populations.
It also recommends additional compensatory measures for the habitat destruction of the peregrine falcon and shore swallow, if these two species do not colonize the new planned areas. It also recommends identifying and presenting the value of the trees that will disappear.
Finally, the quality of the project’s landscape, its carbon footprint, and the goals of sober mining, materials use, increased recycling, and blasting were discussed.
The full report can be viewed on the MRAe Bretagne website.