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Projects of the decade: GWYNEDD CONSULTANCY

Gwynedd’s improvement of a 10.2km single carriageway road running through Wales will significantly improve residents’ quality of life.

A487 Llanwnda to South of Llanllyfni Improvement

Project description

Improvement of 10.2km of single carriageway trunk road, with 10 structures and significant environmental constraints.


The new road bypasses the villages of Llanllyfni, Penygroes and Groeslon, reducing the volume of traffic and significantly improving the residents’ quality of life. A notable feature of the scheme is the quality and quantity of natural stone walling and “cloddiau”.


The scheme passes close to Glynllifon, site of a major lesser horseshoe bat roost. A variety of measures have been employed over the years in attempts to mitigate the effect of the scheme on the bat population, and work is still being carried out to monitor the effectiveness of these measures.

Interesting facts

■ ICE Wales George Gibby Award, Highly Commended 2002
■ Stone Federation Great Britain Natural Stone Awards, Commended 2002


Start date: January 2000
Completion date: September 2001

Contract value


Other parties

■ Client National Assembly for Wales
■ D&B Contractor John Mowlem & Company
■ Contractor’s Designer Gifford & Partners

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