Mott MacDonald Approves Filter Unit

Ridgeway provided Vinci Construction with a range of filter units (1, 2 & 4 tonne) for scour protection of a flood wall on a NET tram project.  The tram line located in Nottingham passes a flood storage area that experiences various levels of water annually. Ultimately this required scour protection at the base of the flood wall to […]

Rivers Agency install Units in Camlough

Filter unit being installed in Camlough

Over the past few years the Rivers Agency has been utilising the filter units system for a number of different projects throughout Northern Ireland. The most recent of these was temporary application to protect the foundations of an abutment which had been experiencing high volumes of water due the winter season rainfall and the overflow […]

Innovative use of Filter Units at Sea Coastal Defence Scheme

Boskalis Install Filter Units on Clacton and Holland on Sea Coastal Defence Scheme

Boskalis Westminster UK installed 4T Eco-green filter units to allow water to flow freely from a number of outlet pipes located along the sea front of the Clacton and Holland-on-Sea beaches. The filter unit is a scour protection solution, however, innovative thinking from the consulting engineers, Mott MacDonald, recognised the filter units versatility and applied it […]

Mersey Gateway presents challenging tidal conditions for Filter Units

Mersey Gateway tidal project

The Mersey Gateway is currently the largest new build bridge project to take place in the North West of England. During the first 6 months of 2015, Ridgeway worked closely with the project’s Senior Engineers supplying the 4T filter unit for scour protection of the North Cofferdam and later the Central Cofferdam. The Mersey Estuary […]

Key Element of EA Flood Defence Scheme

Environmental Agency Flood defence scheme

Croston Flood Risk Management Scheme The Environment Agency along with WEM Framework contractors VBA (Volkerstevin, Boskalis & Atkins) specified 2T Kyowa Filter Units, known as Rockbags in the UK, for the large flood risk management scheme currently being constructed to reduce the flood risk to Croston Village. Located in the central west region of Lancashire, […]

Foreshore Emergency works at historic London site

Tower of london Kyowa filter unit case study

Tower of London Case Study In February this year emergency works were performed on the Tower of London foreshore to prevent further undermining of the wall adjacent to Tower Bridge. Mackleys Civil Engineering was awarded the contract by the Environment Agency to install over 200 2 tonne Kyowa filter units, known in the UK as […]

Kyowa Filter Units supplied for Rampion Offshore Wind Farm project

Since August 2016 Ridgeway has been supplying their patented Kyowa Filter Unit system, known in the UK as Rockbags, for cable end support and cable protection during the construction of the Rampion Offshore Wind Farm project, which is owned by E.ON, UK Green Investment Bank and Enbridge. Ridgeway have been working closely with the Rampion […]

Kyowa Filter Units deployed to protect pipeline

Our Kyowa Filter Units, known in the UK as Rockbags, have been successfully used to provide improved protection for a waste water outfall pipe. 4t Units supplied by Ridgeway have been installed over the pipeline to provide protection from scour damage, while at the same time benefiting the surrounding marine environment. The Rockbag is comprised […]

Scour protection for Lancashire bridge piers

Rockbag being lowered into place

Our Kyowa Filter Units, known in the UK as Rockbags, have been successfully installed by contractors working for Lancashire County Council. The Units were utilised to provide scour protection on four piers of Penwortham Bridge in Preston. Penwortham Bridge is located on the River Ribble. The Rockbags are helping protect the structure from tidal waters […]