At Parkhead Junction the original canal continues up the locks and under the railway viaduct to enter the low portal of the Dudley Tunnel (no towpath). At the top of the locks the remains of the Earl of Dudley's private canal - the Pensnett Canal - can be seen and there is also a monument in the form of a tunnel ventilation shaft to commemorate the reopening of the tunnel in 1973.
At the junction itself, next to the former pumping engine house, the Dudley No.2 Canal branches off and is now the main through route.