at Millbay, Plymouth
1846 Incorporated
1850 Connected to the South Devon Railway
Brunel built another pier, an iron floating pontoon 300 ft (91 m) long by 40 ft (12 m) wide (91 m × 12 m) for the Irish Steamship Co whose vessels were regularly using the harbour. Then he constructed the inner basin, with limestone and granite walls. It had dock gates and a drydock at the western side and was 1,250 by 400 feet (380 by 120 m) in size. It opened in 1857.
A significant amount of shipbuilding took place here: Willoughby Brothers was in business from 1857 until 1969 and built vessels for the Royal Mail Steamship Co, Customs and Excise and others, as well as chain ferries for Torpoint, Saltash, Littlehampton and Felixstowe
