 When the top three locks of the Spon Lane flight were no longer required, as a result of the lowering of the summit, they were simply filled with earth and abandoned.They were uncovered again briefly in July 1969 during the construction of the M5 motorway, but were destroyed to make way for the new road.The junction is on the Wolverhampton Level, at the top of the three locks that descend to Wednesbury.