Pont-barrage de Monsin, Bridge and weir structure on the Meuse in Liège, Belgium

The Pont-barrage de Monsin combines a road bridge with a weir dam on the Meuse River. The structure carries traffic above while housing sluice gates below that manage water flow and levels downstream.

Construction started in 1928 and the structure opened in 1930, with metal parts supplied by the local Cockerill works. It suffered damage during the Battle of Belgium in 1940 but was rebuilt and has operated continuously since.

The bridge was built during Liège's 1930 International Exposition, when the city wanted to showcase its role as an industrial center. It represents the engineering confidence of that era and how the city reinvented itself through modern infrastructure.

The bridge carries a road linking Jupille to the autonomous port of Liège, facing the Piedbœuf brewery on the opposite bank. It is reached on foot from the riverbanks, where the six sluice gates, the two lift towers and the adjoining hydroelectric plant can be seen.

The steel components were manufactured by Cockerill, a local metalworks company that was a major employer in the region at the time. This industrial partnership shows how the project was deeply tied to Liège's economic strength in the 1930s.