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About: North Downs Tunnel     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatRailwayTunnelsInEngland, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thinginfrastructureroute of transportationrailway tunnelyago:WikicatTunnelsCompletedIn2001geo:SpatialThingarchitectural structurewikidata:Q1311958yago:Artifact100021939yago:Object100002684yago:Passage103895293yago:Passageway103895585yago:PhysicalEntity100001930yago:YagoGeoEntityyago:YagoPermanentlyLocatedEntityyago:Tunnel104497962yago:Way104564698yago:Whole100003553yago:WikicatRailwayTunnelsInEngland New Facet based on Instances of this Class

The North Downs Tunnel, also known as the Blue Bell Hill Tunnel, is a railway tunnel that carries High Speed 1 through the North Downs, at Blue Bell Hill near Maidstone in Kent, south-east England. The tunnel is 3.2 kilometres (2 mi) long, with an internal diameter of 12 metres (40 ft) and a cross-sectional area (CSA) of 150 square metres, and descends to a depth of 100 m (325 ft) below the chalk hills. Thus, at the time of its completion, the North Downs Tunnel was both the largest (in terms of CSA) and deepest twin-track railway tunnels to have ever been constructed in the UK. Trains using High Speed 1 can reach 300 kilometres per hour (186 mph) whilst in the tunnel.