A live crib wall of willow were used to protect a high pressure gas pipe that had become exposed due to significant river bed scour and bank erosion on a section of the Afon Elwy near St Asaph.
River Elwy, Pipeline Protection, North Wales

A live crib wall of willow were used to protect a high pressure gas pipe that had become exposed due to significant river bed scour and bank erosion on a section of the Afon Elwy near St Asaph.
Salix were approached as river restoration experts and because of the innovative Menzi Muck Spider machine which is capable of climbing in and out of a river causing little disturbance.
Salix worked with Natural Resources Wales at Cwmparc in the Rhondda Valley to renaturalise the water courses in order to reduce flood risk and increase biodiversity.
Salix’s River Dulais project demonstrating the use of large woody debris (LWD) is now ten years old and has been is included in the manual of River Restoration Techniques.
Salix were awarded the contract and began works to carry out 300 metres of riverbank protection to protect this existing exposed high pressure gas pipe in March 2013.
A new warehouse complex required a large balancing pond to take surface runoff water. The pond had steep sides which required some form of ground stabilisation.
Salix worked with consulting geotechnical engineers to provide design and build proposals to stabilise over 800 metres of steep riverbank composed of highly erodible colliery shale.
Salix were invited to submit a bioengineering solution to solve an erosion issue at a pipeline crossing in West Wales. The solution used a combination of locally harvested willow and Rock Rolls to provide a stable revetment in this cobble bed river.