Hackbridge Weir Removals

The site itself was once a Victorian lake feature and it retains the four decorative weirs and large width. The River Wandle enters the site as it passes beneath Hack Bridge, passes through the over-widened reach and splits into two arms around Culvers Island. The right-hand side arm is considered to be the primary channel for flood risk purposes and it is therefore important that flows remain balanced between both arms. The primary barriers are a screened weir and culvert system at Shepley Mill, four decorative weirs at Hackbridge and a tilting weir at Goat Bridge. Removal of these barriers would reconnect approximately 2.5 km of river previously inaccessible to migratory fish, as well as allowing the physical restoration of the impounded reaches.

Edenvale Young were commissioned by the Wandle Trust to undertake ISIS-TUFLOW modelling on the River Wandle. This involved a representation of the Hackbridge area in 2D and a simulation and comparison of the current conditions at the site with the design condition, which included the removal of 4 weirs and channel naturalisation.

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Hackbridge Weir Removals