The Canal, between Ashton-under-lyne and Huddersfield, opened to through traffic in 1811 and took 17 years to build. It includes Standedge Tunnel which took over 16 years to build and at 5.2 kilometres (over 3 miles) in length, is the longest, highest and deepest canal tunnel in Britain. The canal’s construction was a major feat of engineering and human effort that developed the economies of the Tame and Colne valleys at the start of the Industrial Revolution. With increasin