The hydraulic boat lifts of the Canal du Centre

A canal to connect Hainaut with the wider world

In the late 19th century, industrial Hainaut needed to transport its goods, especially coal, to new markets. The Canal du Centre was part of a programme to link the Meuse and Scheldt basins. The challenge was geographical as well as technical: very different levels had to be connected over a short distance, in an area where water supplies were limited.

A succession of locks would have consumed a great deal of water. The engineers therefore chose the principle of the hydraulic boat lift. The first structure, at Houdeng-Gœgnies, was inaugurated in 1888. The full canal did not open to navigation until 1917, after a lengthy construction project. The long gap between those dates also reveals the ambition and difficulty of infrastructure designed to serve an entire industrial basin.

Two tanks, water and a remarkable balance

The system uses water-filled tanks connected by a hydraulic mechanism. A slight imbalance is enough to lower the upper tank and raise the other. The boat does not need to be hauled out of the water: it stays afloat throughout its vertical journey. That combination of a simple principle and precise engineering makes the structures fascinating to watch.

A surprising detail is that a tank does not simply become heavier when a boat enters it: the vessel displaces water. Weight therefore has to be understood differently from a passenger lift. Watching the canal and its machinery offers a wonderful opportunity to explain Archimedes' principle without a blackboard.

An industrial landscape recognised by UNESCO

The site was inscribed on the World Heritage List in 1998. The inscription covers the four lifts and their surroundings, not just their metal silhouettes. Bridges, engine houses, staff accommodation and the canal route form a coherent whole. UNESCO highlights the exceptional preservation of these installations and their original operating principle.

Seeing the whole system changes the walk. A service house is no longer a secondary building, but part of what kept the waterway running. Trees, banks and structures relate to one another. The canal then tells us about the organisation of work and the region as much as about an engineering achievement.

Discovering the site from the banks or the water

Now used for leisure boating and visitor experiences, the historic canal lends itself to an outing combining close observation with a walk. The towpaths let you approach the structures at your own pace. Cruises and technical tours, when offered, provide another perspective. Their routes and the operation of the installations depend on the programme and conditions on the day: the official website remains the best place to plan your visit.

We recommend taking time to distinguish this historic canal from the large modern boat lift at Strépy-Thieu. They tell the story of two different stages in navigation and are not the same monument. This dialogue between old and new is precisely what gives the Centre region its character: here, the landscape itself becomes a book of inventions.

Visit the official website

Photos and credits

Photo 1 — Davidh820 · CC BY-SA 3.0 · Wikimedia Commons source.

Photo 2 — Trougnouf (Benoit Brummer) · CC BY 4.0 · Wikimedia Commons source.

Photo 3 — Trougnouf (Benoit Brummer) · CC BY 4.0 · Wikimedia Commons source.