In 2019 we built the foundations of the municipal boiler room of the city of Bourbon-Lancy (71). This boiler room, located on the old bed of an embanked stream, is made with prefabricated reinforced concrete elements. For the foundations, we made reinforced concrete pits, positioned on clusters of screw piles, lowered to depths of 8 m and more. More than 100 piles of different diameters were used to build the foundation of this boiler room.