Created in 1543, this drainage channel drains the flow of rice fields and marshes. The water is evacuated by pumping in direction to the small Rhône at Albaron station or to the Great Rhône by the Grand Mar sewer. The water used to irrigate the land comes from the pumping station connected to the Rhone by the Triquette canal built in 1627. A siphon allows him to pass under the Rousty canal to browse and irrigate the land through a water carrier.