Cruising from Stoke Bruerne to Blisworth underground

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@narrowboat-life - Cruising from Stoke Bruerne to Blisworth underground
This episode is through the hole in the hill or the longest freely navigable tunnel in the UK at Blisworth starting at the southern portal (2 Way Traffic)
Its dark, dingey, extremely wet and boring 45 minutes in the hole after a long wet season
The Northern portal is 1.75 miles away from the start
A little bit of History of Tunnel
Work began in 1793, but errors by the contractor left a wiggle in the tunnel, and after three years’ work it collapsed due to quicksand, claiming the lives of 14 men. It was then decided to begin again with a new tunnel.
By the time the rest of the Grand Junction Canal had opened between London and Braunston, Northamptonshire in 1800, apart from the crossing of the River Great Ouse, @ the iron trunk aquaduct the section of canal from Blisworth to the lower end of Stoke Bruerne locks was the only section unfinished. This was despite the tunnel having been under construction for seven years: the gap was filled by a temporary horse-drawn tramway over the top of the hill, with goods being transported from boat to wagon and back again. The tramway, built in 1801, was Northamptonshire's first railway. In March 1805, the tunnel was finally opened and the rails were reused to connect the main line of the canal to the River Nene until the branch canal to Northampton was constructed.
Until the 1870s travel through the tunnel was only achieved by men lying on their backs pushing the boats with their feet (legging it). From 1871 steam tugs were used to pull boats through, and extra ventilation shafts were installed. Boaters wishing to avoid the extra cost involved in using the tugs could still leg their boats through, but by the 1930s motor boats (towing a butty boat) were common so the practice would have been unusual.
Due to changes in the shape of the tunnel over time, the tunnel became unnavigable. There was major rebuilding of the tunnel in the 1980s, with sections lined with pre-cast concrete rings. It was also used to test out the materials that were later used on the Channel Tunnel. An unused ring is on display near the south portal. pictures @ • Visit No 1 2024 - Stok...
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