The Platin de Grave concession allows the extraction of up to 400,000 m³ of marine aggregates per year. Scientists and NGOs want to prevent its renewal until 2043, highlighting impacts on the ecosystem of the estuary natural park.
Despite a favorable opinion from the natural park management council delivered in April 2023, several voices continue to be raised to question this industrial activity. The estuary is in a “poor” ecological state, which questions “the capacity of this ecosystem to sustainably support the accumulation of anthropogenic activities which impact it”