Twenty-six percent of the Netherlands lies below sea level, making the country vulnerable to floods. This is especially true of the 2000-year-old city of Nijmegen, which straddles the Waal river. The town is home to many examples of flood-resistant infrastructure, but one footbridge there works a bit differently. Instead of building it around the threat of rising waters, the designers of the Zalige bridge made a crossing that changes along with its environment, according to Co.Design.
Commissioned as part of the Netherland’s Room for the River infrastructure program, it connects the Waal’s northern bank to a small island that’s part of a public park. NEXT architects, in collaboration with H+N+S Landscape Architects, made a bold choice when designing it: The path curves up and down, and at one point is level with the park’s floodplains. When the river resides at normal levels, pedestrians can walk the bridge in its entirety. Only when water levels rise is the reasoning behind the unusual shape revealed. The flooded path leaves behind a series of raised concrete blocks sticking out of the water, and to keep moving, people must hop from one block to the next.
The bridge opened in 2016, but it made news again this January when Nijmegen saw its highest water levels in 15 years. As the river rose, the Zalige bridge could be reached only by using the stepping stones. Residents flocked to the site for a closer look at the water, ignoring instructions from authorities to avoid the park as flooding continued. Eventually the water became so high that even the blocks were completely submerged, but not before demonstrating the bridge’s innovative approach to an old problem.
NEXT writes on the project webpage, "As a crest above the river, the bridge emphasizes the dynamic character of water by letting people see and experience the changing river landscape."
All images: © NEXT architects