what is the longest canal tunnel in uk
Huddersfield Narrow
title: Trent and Mersey Canal text: men lying on their backs and pushing against the roof with their feet. This was a physically demanding and slow process and created major delays, so leading civil engineer Thomas Telford was commissioned to provide a second, wider, parallel tunnel with a towpath. This 2926 yard (2676 m) long tunnel was opened in 1827. In the 1900s, the Brindley tunnel was closed due to severe subsidence, but the Telford Tunnel - although also prone to the same problems - remains in use, and is the fourth-longest navigable canal tunnel in the United Kingdom. Just north of Harecastle Tunnel, the T title: Sapperton Canal Tunnel text: workmanship, as it had to be closed for ten weeks after only a year, while repairs were carried out. It was superseded as the longest canal tunnel in England in 1811 by the Huddersfield Narrow Canal's Standedge Tunnel, which was long when built, later extended to to accommodate the adjacent railway tunnel, and remains the highest, longest and deepest canal tunnel in Britain - though, unlike Sapperton, Standedge can only accommodate . Strood Tunnel on the Thames and Medway Canal was also longer at when it opened in 1824, but was cut in two in 1830 by opening out a title: Standedge Tunnels text: finally opened; it is the longest and oldest of the four and is the longest and highest canal tunnel in the United Kingdom. Having been closed to all traffic in 1943, the canal tunnel was later re-opened during May 2001. The first, single-track railway tunnel, built for the London and North Western Railway (LNWR) on their line between Huddersfield and Manchester, was completed during 1848. However, it quickly proved to have insufficient capacity and a second, parallel, single-track tunnel was opened during 1871. Finally, the LNWR opened a third, double-track tunnel nearby on 1894. All four of the tunnels are title: Blisworth Tunnel text: Blisworth Tunnel Blisworth Tunnel is a canal tunnel on the Grand Union Canal in Northamptonshire, England, between the villages of Stoke Bruerne at the southern end and Blisworth at the northern end. The northern end is about from the northern end of the Grand Junction Canal at Braunston, Northamptonshire and the southern end about . At 3,076 yards (2,813m) long it is the third-longest navigable canal tunnel on the UK canal network after Standedge Tunnel and Dudley Tunnel (and the ninth-longest canal tunnel in the world). At its deepest point it is "ca."143 feet ("ca."43m) below ground level. The tunnel title: Butterley Tunnel text: Butterley Tunnel Butterley Tunnel is a one and three quarter mile long canal tunnel on the Cromford Canal below Ripley, in Derbyshire, England, opened to traffic in 1794. Along with Butterley Works blast furnaces, part of the canal tunnel and its underground wharf were declared a scheduled monument in 2013. The tunnel was 2,966 yard (2712m) long, wide at water level, and from water to soffit (depending on the water level). At the time of building it was the third longest canal tunnel in the World after Sapperton and Dudley. Thirty-three shafts were sunk during construction with the workings dewatered