 However, the section up to Graving Dock lock was retained, so that users of the canal could still repair their barges, and it was at this point that the new dock was constructed which gave the Graving Dock lock its name.The canal was almost immediately leased to Watts, Blake and Co., a company who sank clay-pits.The canal passed into the ownership of the Great Western Railway in 1877, but continued to be leased to Watts, Blake and Co., who paid a fixed price for its use, and were also required to maintain it.