Blisworth of Blisworth Junction on the line to Towcester. The ore was taken to Scunthorpe and South Wales for smelting. A few traces of all of these quarries remain mainly in the form of depressed field levels and some buildings connected with the later quarry. Lastly another limestone quarry was opened near Rectory Farm west of the Towcester Road to provide stone for use in connection with construction of the M1 motorway. This remains and is now a nature reserve. Blisworth Blisworth is a village and civil parish in the South Northamptonshire district of Northamptonshire, England. The West Coast Main Line,
Netherton Tunnel Branch Canal was later converted to electricity and it is now unlit. The air vents that run along the line of the tunnel and provide ventilation, and a shaft of light into the canal, are known by the locals as "pepper pots", because of their shape. They are brick-lined and the openings are covered by an iron frame or grill. The wide bore and good ventilation mean that boats using the tunnel today are allowed to use the power of their internal combustion engines, which is prohibited in the narrower Dudley Tunnel. The tunnel cost £302,000 as opposed to the £238,000 estimate