Lock 6 or Clydach Bridge or Mond Lock (8,350m from Swansea Basin). The lock is in good condition with the double lower gate nearly intact and what might be a much-patched upper gate. The bridge which crosses it was built directly over its lower end with no provision for a towpath. As a result this was one of two locks equipped with pulleys on the lower gates to pull the boats into the lock-chamber. The bridge was later widened towards the lock, shortening the balance beam of the eastern, lower lock gate so that it had to be closed by using a pulley. The lock, which has a chamber in water, is one of the best remaining on the canal. The western side of the lock has been rebuilt in ashlar at some time.

Lock 6, SN 6952 0142

Stephen Hughes, 14.08.2006