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Old Colwyn embankment repairs

Old Colwyn Embankment Repairs

  • Network Rail Wales

  • Old Colwyn

  • 3,300mMultiTrack

  • MultiTrack

We were approached by Alun Griffiths (Contractors) Limited, and Atkins to advise on a suitable geotextile to go beneath rock armour as a heavy-duty separation and filtration layer. The geotextile would form part of the necessary repair work to Network Rail Wales’ embankment at Old Colwyn, Conwy.

During the design phase, Atkins considered and appraised options using either 3,000kg or 6,000kg rock armour with an appropriate grade of MultiTrack SNW geotextile beneath. The final design solution was then agreed upon between Atkins, Alun Griffths (Contractors) Ltd and Geoworks, utilising 6,000kg rock armour overlying MultiTrack SNW140 geotextile.

Our needle punched nonwoven geotextile, MultiTrack SNW, was chosen as it has been specifically developed to offer outstanding performance at minimum weight. The MultiTrack SNW range is manufactured from 100% virgin polypropylene staple fibres and offers unrivalled CBR puncture resistance and tensile strength coupled with optimised elongation and permeability.

Old Colwyn Embankment

Our needle-punched nonwoven geotextile, MultiTrack SNW, was chosen as it has been specifically developed to offer outstanding performance at minimum weight.

Shahid Raza

Technical Sales Manager, Geoworks

Old Colwyn Embankment

Working either side of high tides, the work to repair the sea defences was undertaken over a period of five weeks, using three heavy excavators and two earth movers to transport the rocks along the beach.

With the repairs now complete, the 100-year-old sea defence is now fit to withstand the rigours of constant wave attacks from the Irish Sea storms, thereby protecting the integrity of the important arterial Chester to Rhyl railway line.

The project is one of a series of schemes along the North Wales coastline where we have supplied their Multitrack geotextile to Alun Griffiths (Contractors) Limited who are working for Network Rail Wales.

Related case studies

Related case study

Old Colwyn Embankment Repairs

We were approached by Alun Griffiths (Contractors) Limited, and Atkins to advise on a suitable geotextile to go beneath rock armour as a heavy-duty separation and filtration layer. The geotextile would form part of the necessary repair work to Network Rail Wales’ embankment at Old Colwyn, Conwy. The project is one of a series of schemes along the North Wales coastline where we have supplied their Multitrack geotextile to Alun Griffiths (Contractors) Limited.

Network Rail Wales
Network Rail Wales
Read more
Related case study

Mostyn Sea Wall Repairs

When gale force winds combined with high tides on Thursday 5th December 2013, the result was the worst storm surge to hit North Wales in years. A solution devised jointly by Atkins, Alun Griffiths (Contractors) Limited and Geoworks was agreed. Our geosynthetic products were used to aid the creation of a barrier against adverse weather.

Network Rail Wales
Network Rail Wales
Read more