Belgian Boat Lifts: Strépy-Thieu, La Louvière and the Ronquières inclined plane
The Strépy-Thieu boat lift
L'ascenseur funiculaire de Strépy-Thieu lies on a branch of the Canal du Centre in the municipality of Le Rœulx, Hainaut. With a height difference of 73.15 metres (240.0 ft) between the upper and the lower reaches of the canal, it is the highest boat lift in the world.
The boat lift was designed during the Canal du Centre's modernisation program in order to replace a system of two locks and four 16-metre lifts dating from 1888 to 1919. These locks and lifts were able to accommodate vessels of up to 300 tonnes. By the 1960s, this was no longer adequate for the new European standard of 1350 tonnes for barge traffic, and a replacement was sought.
The construction of the lift commenced in 1982 and was not completed until 2002 at an estimated cost of € 160 million (then 6.4 billion BEF), but once operational, it permitted river traffic of up to the new 1350-tonne standard to pass between the waterways of the Meuse and Scheldt rivers. The lift increased the river traffic from 256 kT in 2001 to 2,295 kT in 2006.
Lifts on the old Canal du Centre
The lifts on the old Canal du Centre are a series of four hydraulic boat lifts near the town of La Louvière (Wallonia), classified both as Wallonia's Major Heritage and as a World Heritage Site (province of Hainaut). Along a particular 7km stretch of the Canal du Centre, which connects the river basins of the Meuse and the Scheldt, the water level rises by 66.2 meters. To overcome this difference, the 15.4-meter lift at Houdeng-Goegnies was opened in 1888, and the other three lifts, each with a 16.93 m rise, opened in 1917.
The elevators are double, consisting of two vertically mobile tanks or caissons, each supported in the center by an iron column. The two columns are hydraulically linked in such a way that one caisson rises as the other descends, the weight of one counterbalancing the weight of the other.
These lifts were designed by Edwin Clark of the British company Clark, Stansfield & Clark.
Since 2002, operation of the lifts has been limited to recreational use. Commercial traffic now bypasses the old lifts and is handled by the enormous Strépy-Thieu boat lift
Following an accident in January 2002, in which a malfunctioning elevator began rising as a motor barge was exiting, lift no. 1 was taken out of service. During the repair work, which began in 2005, a thorough restoration is undertaken.
The Ronquières inclined plane
The Ronquières Inclined Plane is a Belgian canal inclined plane on the Brussels-Charleroi Canal in the province of Hainaut in Wallonia that opened in 1968. It is located in the municipality of Braine-le-Comte, and takes its name from the nearby village of Ronquières.
The Ronquières Inclined Plane has a length of 1,432 m and lifts boats through 67.73 m vertically. It consists of two large caissons mounted on rails. Each caisson measures 91 m long by 12 m wide and has a water depth between 3 and 3.70 m. It can carry one boat of 1,350 tonnes or many smaller boats within the same limits.
Each caisson has a 5,200 tonne counterweight running in the trough below the rails, which permits the caisson to be moved independently of the other. Each caisson is pulled by 8 cables (each of which is 1480 m long) wound by winches located at the top end of the inclined plane.
Each caisson can be moved between the two canal levels at a speed of 1.2 m/s, taking about 22 minutes.
It takes 50 minutes in total to pass through the 1800 m of the entire structure, including the raised canal bridge at the top end.
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Source: Wikipedia