Étang de la Gazonne, (English: "Grassy Pond"), is a 29-hectare (72-acre) lake[1] that provides water for the workings of the Canal de Briare.

[2] Hugues Cosnier, designer of the canal, planned a 3.25-mile-long (5 km) waterway from the River Trezée to the Gazonne.

The Gazonne acted as a reservoir.

[2]