Blisworth Tunnel has no tow path inside, but is wide enough for two narrowboats to pass in opposite directions. Work began in 1793, but errors by 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 section of canal from Blisworth to the lower end of Stoke Bruerne locks
Blisworth in 1852, probably close to the east side of the Towcester road. The ore was sent to an ironworks in Staffordshire. The ore was probably taken by horse and cart to the canal for despatch to the ironworks.Quarrying began seriously in 1853 or 1855 to the north of the road to Stoke Bruerne near the west end of the canal tunnel. The quarry was connected to the canal wharf by a tramway worked probably by hand and with a cable worked incline running through a bridge beneath the road and over a wooden bridge over the canal . At the