The project Seine de crues, put forward by the non-profit Areas, aimed to communicate about the dangers of flooding along the Seine. The “Flood Abacus” chosen for the site at Courcelles-sur-Seine moves with the elements. The spinning house on top indicates wind speed and direction. The colored buoys, lined up at 2 meters above ground level, are pushed upwards by floodwaters. The mast, with its 20cm stripes, allows people to calculate the water level from a safe distance up on the bridge.