 They are now known as the Spon Lane Locks Branch, and are some of the oldest unaltered locks in the country, as they are virtually unchanged since they were built by James Brindley.The junction and the top lock are now under an elevated section of the M5 motorway, and all three of the locks are grade II listed structures.From the junction to the top of Smethwick locks, the canal is level for 

The Old Main Line passes over the New Main Line on the Stewart Aqueduct.