Braunston Tunnel ft (2.13 m) beam boats to pass. There are three air shafts along its length. The tunnel passes underground alongside another Grand Union Canal feature, Drayton Reservoir, from which the feeder enters the canal at the east end of the tunnel. Braunston Tunnel Braunston Tunnel is on the Grand Union Canal about 830 yds (760 m) east of Braunston, Northamptonshire, England top lock. It is in the northern outskirts of Daventry, about 2 km east of the village of Braunston. Braunston Tunnel is 2,042 yards (1,867 m) in length. Built by Jessop and Barnes, the tunnel has no towpath and
Grand Junction Canal at the rate of two guineas (£2/2s or two pounds and ten pence in decimalised currency) per day plus half a guinea (10s/6d or decimal £0.525) expenses. At the north end, there were problems with the construction of Blisworth Tunnel: quicksand was encountered, and errors made in alignment which meant that the tunnel had a pronounced wiggle. With the opening of Braunston Tunnel, the line was open from the Oxford Canal through to Weedon Bec in June 1796. However, Blisworth Tunnel continued to cause problems, collapsing in January 1796. The canal was opened from Braunston to Blisworth in 1797. The