The recommendation for the preferred variant for the renovation of the Westerwoldse Aa bridge is a fixed bridge with a concrete deck. This is the conclusion of a study conducted by Rijkswaterstaat in collaboration with engineering firm Witteveen+Bos.
In this variant, the steel falls (moving panels) of the bridge are replaced by a new concrete deck. To support this deck, the concrete substructure will be reinforced. Additionally, the moving mechanism and control of the bridge will be removed.
Noise Westerwoldse Aa Bridge
We examined various variants for both a fixed bridge and a movable bridge. A fixed bridge with a concrete deck emerged as the best option. This variant is quieter than a movable bridge. A concrete deck is heavier, which dampens vibrations.
It is expected that this will lead to a reduction in noise pollution in the surrounding area.
Traffic Safety Westerwoldse Aa Bridge
A fixed bridge is also better for the safety of road traffic on the A7. This is because there will no longer be stationary traffic due to an unexpectedly opened bridge, reducing the risk of collisions.
Furthermore, the investment costs and maintenance costs of a fixed bridge are lower than those of a movable bridge.
Small Number of Bridge Openings
With a fixed bridge, vessels up to 4.0 m can continue to pass under the bridge. Larger vessels can use the Standing Mast Route via the Eemskanaal.
The study shows that the number of vessels taller than 4.0 m is relatively small. From 2021 to 2024, the Westerwoldse Aa bridge opened approximately 30 times a year.
Next Steps Westerwoldse Aa Bridge
The recommendation for the preferred variant will be discussed with the Ministry of Infrastructure and Water Management. After determining the preferred variant, it will be further developed. We will also begin preparations for contracting a contractor.
It is still unknown when the work will commence outside. When more information is available, you will find it on the page A7: Renovation Westerwoldse Aa Bridge.
Renovation Westerwoldse Aa Bridge
The Westerwoldse Aa bridge is located on the A7 highway near Bad Nieuweschans. Parts of the bridge need to be replaced or renovated. This includes the steel falls of the bridge, the moving mechanism, and the substructure.
With the renovation, we ensure that the bridge can be safely used in the future.