Weirs break up rivers into isolated sections, meaning a variety of aquatic wildlife such as fish and insects cannot reach a variety of habitat to complete their life cycles.
Lowering a 1.6 metre weir at Goat Bridge will bring together disconnected sections of the River Wandle at Mitcham. The weir impounds about 500 metres of river, creating water conditions more akin to a lake than a river and leaving wildlife unable to reach a variety of habitats crucial to their survival.
Adapting the weir at this section of the River Wandle is at the heart of a project between Thames Water, the South East Rivers Trust, the Environment Agency, landowners Sutton Council and designers Mott MacDonald.
Construction work on sites near the river has been taking place in the summer of 2023. Alterations to the weir and the river are due to take place in the autumn of 2023. Planting along the river bank is due to take place in spring 2024.