Sustainable green Welsh oak is being used by the Environment Agency to build fish passes in Wales.

The green, or newly-sawn oak, is being used instead of materials such as reinforced concrete to form baffles that help fish move through culverts and bridge aprons.

The Environment Agency has forged strong links with Coed Cymru  who source the oak from sustainably- managed woodland sites throughout Wales. Coed Cymru is an all Wales initiative to promote the management of broadleaf woodlands and the use of locally grown hardwood timber in Wales.

The wood product is fully Forestry Stewardship Council certified and is not only ideal for the fish passes, but is also considered carbon neutral or even positive when you consider the contribution of the managed woodland sites that the EA is helping to create a market for.

Several new oak fish passes have been built across south Wales, including Chynghordy on the River Towy, and Maesteg on the River Nant Sychbant. The type and specifications of each pass varies. The initial successes have led the EA to experiment with more technical applications. The project at Chynghordy is a Larinier (super active bottom baffle) configuration that normally uses galvanised steel for fabrication.

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