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A477 St Clears to Red Roses Improvement

  • Project Type Roads / Bridges
  • Client Welsh Government
  • Company Involvement Early Contractor Involvement (ECI) including preparation of the Environmental Statement, Draft Orders, Public Enquiry, Design & Construction of the A477 St Clears to Red Roses Trunk Road Improvement. This includes provision of an integrated collaborative service between the contractor, designer, Welsh Government, Transport & Strategic Regeneration and their Agent
  • Form of Contract NEC Option C
  • Dates September 2009 – April 2014 (Maintenance Period to July 2019)
  • Location Wales


The A477 ECI is part of the Trans European Road Network which links the rest of the UK and Europe to west Wales and Ireland via the ferry ports at Pembroke Dock and Fishguard. This 9.6km project, bypassing the communities of Llanddowror and Red Roses, comprised the construction of 8.7km of off-line highway, mainly through agricultural land between Pont Newydd Bridge and Red Roses. The eastern section of the scheme requires online access improvements, between St Clears and Pont Newydd. Environmental constraints on the route include sites of both National and European significance including the Carmarthen Bay and Estuaries SAC.


Key Features

  • 1 million m³ of excavation
  • 578,500 m³ of rock excavation
  • 25,000m of drainage
  • 1,620m of Translocated Hedges
  • 5 no. overbridges
  • 3 no. underbridges
  • Afon Hydfron Riverbride
  • 70 no. Bronze Age Cremation Urns discovered