Leeds City Council / Environment Agency
2015 - 2017
Structural Steel Design Award 2018
Living Waterways Awards 2018 (Runner-up)
CIHT Awards 2018 (Shortlisted)
Structural Awards 2018 (Shortlisted)
AJ Awards 2018 (Shortlisted)
Offsite Awards 2018 (Shortlisted)
ICE Yorkshire and Humber Award 2019
RIBA MacEwen Award 2019 (Commendation)
Civic Trust Awards 2019 (Commendation)
Design more to build less
The 70m-long bridge at Knostrop Weir is part of the major Leeds Flood Alleviation Scheme which was a response to the destructive flooding of 2015. The crossing provides a pedestrian and cycle pathway along the River Aire and forms part of the wider Trans Pennine Trail.
A structurally simple but architecturally dynamic design was developed, with slender support piers placed upon each of the walls of the flood defence weir, which are staggered in plan. The 50mm thick unstiffened steel plates provide a visually minimal support to the sinuous deck form, allowing the deck to ‘float’ above the water.
A subtle use of plan curvature in the edges of the bridge deck produces three wider areas above the supports, where people can linger and watch the weir without impeding commuters travelling into the city.
Care was taken to avoid creating complex curvature in the architectural form of the steel deck which would have been difficult to fabricate and would have increased cost.
“For me, it displays a clear intelligence and commitment to the old idea that public works are a matter of civic pride.”