Grand Junction Canal Nene at Northampton, to the turnpike road at Old Stratford (north-west of the modern Milton Keynes), and to Watford in Hertfordshire: those to Daventry and Watford were not built. The branch to Old Stratford was amended before it was built (see below). The branch to Northampton was delayed as the plans of the Leicestershire and Northamptonshire Union Canal to reach Northampton and thus join with the Grand Junction came to nothing. The link to Northampton was made by a tramroad transferred from Blisworth Tunnel, with the 5-mile (8-kilometre) canal from Gayton being opened in 1815. The link to Leicester was
Cincinnati and Whitewater Canal Tunnel canal tunnel near the village of North Bend, which was finished six years before the canal opened for business. This tunnel was needed because of a steep ridgeline on the village's northern side, separating it from Cleves, on land owned by retired war hero William Henry Harrison, who as one of the canal's proponents was happy to sell land for its right-of-way and to supply wood and bricks for the tunnel. After his ascension to the presidency and sudden death, Harrison was buried atop the ridgeline near the tunnel's southern portal. Lined with brick, the tunnel includes ashlar stonework portals