Project Limmel, The Netherlands

Limmel Flood barrier

New Limmel flood barrier protects Limburg hinterland

BESIX is replacing the flood barrier at Limmel. So that even big ships will be able to pass through with ease. Find out how BESIX tackled this project.

Our solution

Rijkswaterstaat – the executive agency of the Dutch Ministry of Infrastructure and Environment – entrusted BESIX with the construction of the Limmel flood barrier. Our experience in lock construction enabled us to submit a detailed quality plan, explaining the safety aspects and disruptions during and after the project. 

Together with Agidens Infra Automation, which took care of the mechanical dimension of the project, and Rebel Group, providing financial advice, we were responsible for the design, construction, financing and maintenance of the flood barrier. This in itself was already a first: never before had one party been entrusted with the construction and maintenance of a whole flood barrier for such a long time. And this was good news as it allowed us to work more efficiently and learn from one another.

Our responsibilities:

  • Design and construction of the new flood barrier
  • Demolition of the old flood gate
  • Maintenance of the complex
  • Attract and follow up funding 

Rijkswaterstaat gave us the opportunity to explore innovative solutions. Together with Agidens we designed a simple yet powerful hydraulic lifting mechanism to move the lock gate. We implemented a smart solution to avoid leaks: by anchoring the dam walls on each of the four sides of the new flood gate in the limestone rock bed, we created a watertight container.

This is the third time BESIX builds such a flood barrier. Nevertheless, this project also has its own challenges, including the very limited room for manoeuvring when carrying out major lifting operations due to the presence of the existing floodgate. It was also crucial to minimize disruption to ship traffic on the busy Meuse during the works. Except for two weekends, freight traffic remained uninterrupted throughout the entire period. To ensure this, we first built the new lock, and we only demolished the old one after that, also making sure the Limburg hinterland would remain optimally protected during the works.

New Limmel flood barrier protects Limburg hinterland

The Limmel flood barrier is an eighty-year-old barrier in the Juliana canal near Maastricht. It is an important link in the Maas Route connecting Belgium, the Netherlands, Germany and France and offering protection against the risk of flooding.

The flood barrier was not just due for replacement - its function was also to be fulfilled in a different way. After the replacement, the new barrier will no longer serve as a lock for ships. It will act as a flood barrier protecting the Juliana Canal and the area behind it in case the river Meuse breaks its banks.

Result

The flood barrier formed a bottleneck for the constantly increasing volume of traffic on the waterway. To create more room for cargo vessels, BESIX began by replacing the old bridge that spanned the flood barrier. The new one does not go over, but next to the floodgate and has no supports in the water. This creates more space without widening the actual canal. The new bridge is also higher: vessels up to 9 metres high can pass under it easily.

The key to working together successfully is always the same: to see things from the client’s point of view

Ken Watzeels
Technical Director

Minimising disruption

In the design, BESIX allowed for the Juliana Canal to be closed just four times, for a maximum of 24 hours on each occasion. The elements of the new flood barrier are therefore constructed outside the canal where possible. The canal will only be closed for the installation of the Kanjel culvert, the lift gate, the steel bridge element and the testing of the various parts.

Limmel the game

During this project, BESIX achieved another first: Limmel the game, an educational game for secondary school students. During the game, students take on the role of the various stakeholders in the project. They have to build the new flood barrier together, up against the clock and keeping to a set budget. The game was such a great success that BESIX intends to use it for other projects.

Cyclists first

The area around the flood barrier is a popular cycling route for schoolchildren and holidaymakers. The new bridge is much safer than the previous one, thanks to the separate car and cycle lanes. We also plan to install benches on which cyclists can take a rest and enjoy the view, with a charging point for e-bikes and a well for drinking water.

Simple and unique mechanism

What was the main requirement for the new barrier? For the floodgate to close securely when the area behind the barrier was threatened. The more complicated the mechanism, the more there is to go wrong. So, the subcontractor Agidens has created a system with a minimum of electronics. The hydraulic lifting mechanism is set in motion by the weight of the lift gates themselves. A simple system that also requires little maintenance.

We learn from one another, so that we come up with smart and sustainable solutions together

Jasper Tils
Project manager, Rijkswaterstaat

Project details

Project name

Limmel Flood barrier

Area(s) of expertise

Locks, Water

Contract type

Design, Build, Finance & Maintenance

Location

Limmel, The Netherlands

Stakeholder(s)

BESIX Nederland

Client

Rijkswaterstaat

Building Period

2015 - 2018

Maintenance period

2018 - 2048

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