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Original Text (Annotation: EPW046626 / 2140927)

' Blackwall Tunnel northern entrance. The original Tunnel opened in 1897 at a cost of £1.4M. It was a single bore, 4,430 feet (1,350 metres) long and was wide enough for a vehicle lane in each direction plus a pedestrian footway each side. See https://en.wikipedia.org/wiki/Blackwall_Tunnel '