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Senior Hargreaves Wins Ventilation Contract for Holmesdale Tunnels on M25(20/11/2006)
The Holmesdale tunnels, at junction 25 on the M25, opened in 1984 but have now become a major point of congestion. The £75 million Highways Agency scheme to refurbish the tunnels involves the removal of jet fans located next to the carriageway to create more space. This has required the engineers to develop new ventilation methods that do not occupy valuable roadside space and are yet capable of introducing high volumes of air in an emergency t... [more]
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