EPTB Seine Grands Lacs

EPTB Seine Grands Lacs is a public territorial basin institution created in 1969 under the name of Institution interdépartementale des barrages-réservoirs du bassin de la Seine. Grouping together the departments of the former Seine, its mission is to reduce the winter and spring floods of the Seine and its main tributaries (the Yonne, Marne and Aube) and to support their summer and autumn flows. The EPTB Seine Grands Lacs acts within the framework of the Seine Plan to reduce the vulnerability of territories to flooding.

It was formerly known as Grands lacs de Seine. By extension, the term "Grands lacs de Seine" also refers to all the artificial lakes in Burgundy and Champagne-Ardenne, built and managed by this establishment. Their total surface area is 101 km², equivalent to that of the city of Paris. EPTB Seine Grands Lacs is currently working on a project to build a new structure in the Bassée area (Seine-et-Marne), designed to complete the flood protection system and reduce the foreseeable damage associated with these phenomena.