Originally, a partnership

This site largely belonged to the private company, EDF, which planned to make a hydroelectric reservoir. As early as 1996, aware of the ecological potential of the site, the Conservatoire d'Espaces Naturels began negotiations to buy the land. In 2005, the Community of Communes became the owner for a symbolic one Euro and arrived at an agreement with the Conservatory and the National Forestry Office to entrust them with its management. It is thanks to this partnership that the site now receives so much attention and is open to the public.