In parallel with the construction of the overflow, we are installing the first “Buton beams” of the retention basin of Captain Gèze in Marseille. These beams will make it possible to carry out the earthworks inside the basin, then the civil engineering of the lower levels. This buried trilobe-shaped pool, 20m in diameter, has a capacity of 10,500 m3. Its mission is to store surplus water during rainy periods in order to compensate for the saturation of the networks and avoid discharges into the sea directly. (Client: NGE Génie Civil)