Ogwen Bank Weir

We commisoned Cbec eco-engineering UK Ltd to undertake a feasibility assessment of restoration options to improve fish passage on the Afon Ogwen at Ogwen Bank, where a weir represents a significant barrier to fish migration upstream.

Key project aims were to assess initial options for modification of the weir to improve fish passage with consideration of stakeholder aspirations, including exploring opportunities to maintenance and, where possible, enhance the amenity value and aesthetics of the site and make recommendations for further work, including design and surveys, where required.

The Preferred Option at Ogwen Bank was a rock ramp at the existing notch in the weir crest and the report recommended that additional assessments are conducted to inform the design and construction phases and minimise uncertainty or risks associated with weir modification.