Wamphray Culvert

Embankment supporting the West Coast Main Line


The design concept for the project was to aid migrating fish and to permit them to reach new spawning grounds upstream, in addition to this it was to also provide a suitable area to accommodate rain and flood waters whilst mitigating the possibility of any scour erosion to the railway embankment supporting the West Coast Main Line

Project Summary

Working in partnership with Amco Rail we were appointed as the successful civils contractor to carry out all formwork, reinforcement and in-situ concrete works for the new permanent upstream river channel and downstream radial channel. A stepped 350mm reinforced slab was installed and supplemented by 3m high radial perimeter walls, in addition to this there were reinforced concrete weir walls which incorporated a profiled void to allow the fish to travel safely upstream.

  • Works were successfully completed within programme and to budget during Scotland wettest winter ever recorded.
  • Reduced impact of embankment erosion to the west coast mainline and any flooding to surrounding areas
  • The Wamphray Culvert project was successfully awarded the Breedon Environmental award at the Chartered Institute of Highways and Transportation awards 2016 and was also nominated for the Sustainable Development of the year project at the National Rail Awards 2016
  • New fish pass allows migrating fish to reach new spawning grounds