Recently described in NFU Countryside magazine as “arguably the greenest road in Britain”.
In January 2005, an £18.5 million programme to improve a stretch of the A470 trunk road between Dolwyddelan and Pont-yr-Afanc was completed. Forming part of a major highway link between north and south Wales, the works are set to boost the economic and social development of the area, which relies heavily on this section of the road.
Following the steep and wooded valley sides of the Afon Lledr within the Snowdonia National Park, the road travels through an internationally acclaimed area of ecological and environmental importance.
Before its improvement, the road was narrow with a tortuous alignment causing frustration to drivers and difficulties for emergency services. By bringing the road up to current standards, the National Assembly for Wales aims to cater for existing and predicted traffic flows, providing a safer and less stressful route for road users.
Administering the scheme on behalf of the Welsh Assembly Government, Halcrow has been a key player since 1986, also coming up with the concept design. Halcrow worked closely with contractor Laing O’Rourke Civil Engineering, detailed designer Arup and subconsultant WynThomasGordonLewis, to deliver the scheme early and to the highest environmental standards.
Retaining and boundary walls were constructed with a drystone appearance to emulate the character of the existing walls. Where possible, stone has been salvaged from the old walls and re-used. All masonry work has been constructed under the supervision of a qualified Drystone Walling Association Master Mason.
Extensive archaeological surveys were carried out before construction work started, with experts on hand to advise on the significance of any ancient finds throughout the period.