Dorman Long & Co was a UK steel producer, later diversifying into bridge building. It was once listed on the London Stock Exchange. History The company was founded by Arthur Dorman and Albert de Lande Long when they acquired West Marsh Iron Works in 1875. In the 1920s Dorman Long took over the concerns of Bell Brothers and Bolckow and Vaughan and diversified into the construction of bridges. In 1938 Ellis Hunter took over as Managing Director and he continued to lead the business until 1961. In 1967 Dorman Long was nationalised, along with 13 other British steel-making firms, becoming subsumed into the government-owned British Steel Corporation. In 1982 Redpath Dorman Long, the engineering part of the business, was acquired by Trafalgar House who in 1990 merged it into Cleveland Bridge & Engineering Company in Darlington. Iron and steel Iron-making has been known in Cleveland since the Romans found iron slags in North Yorkshire, with small-scale iron-making known to have taken place at Rievaulx and Whitby Abbeys and at Gisborough Priory in the 17th century. Some of the key events connected with iron-making in Cleveland: 1837: The first Cleveland ironstone mine opens, at Grosmont, for the Losh, Wilson and Bell ironworks. 1841: Bolckow and Vaughan open the first ironworks in Middlesbrough. 1850: 8 June – The Discovery of the Cleveland Main Seam of Ironstone at Eston by Ironmaster John Vaughan and mining engineer John Marley both of Bolckow & Vaughan. The Cleveland iron rush begins. 1865: 30 blast furnaces operate within six miles (10 km) of Middlesbrough and one million tonnes per annum (TPA) of iron are produced to make the area one of the world's major centres of iron production. 1879: Sidney Gilchrist Thomas arrives in Cleveland and introduces the first commercial steel. 1903: Partial amalgamation of Bell companies with Dorman Long. 1917: The Redcar steel plant is opened, making steel in the open hearth process. 1928-9: Dorman Long takes over residues of Bell and Bolckow Vaughan. 1946: Dorman Long purchases of land between the Redcar and Cleveland Works to build the Lackenby development. 1955: The Dorman Long tower, a combined coal silo, firefighting water tower, and control room, was built on the Teesside steelworks site. 1967: Dorman Long, South Durham Steel Iron Co, and Stewarts and Lloyds come together to create British Steel and Tube Ltd. 1967: The steel industry is nationalised and the British Steel Corporation is