 The original construction was completed in 1809 under the direction of William Jessop and substantially improved by Isambard Kingdom Brunel in the 1830s.Restored in the 1990s, Underfall Yard has been designated as a scheduled monument and from the 1970s onward many of the buildings at Underfall Yard have earned Grade II Listed Building status.The harbour and its equipment are still actively maintained, and house a cooperative of maritime companies.