Teesside Steelworks South Bank coke ovens and the BOS plant at Lackenby closed in 2015. The Teesside Beam Mill and some support services still operate at the Lackenby part of the site. Steel production on Teesside begins when Bolckow, Vaughan & Co Ltd, formerly Bolckow, Vaughan, opens the Cleveland Steelworks in Middlesbrough. Using the Bessemer process, the works have 3 blast furnaces. Albert John Dorman enters into a partnership with Albert de Lande Long taking over the West Marsh Ironworks in Middlesbrough. Dorman Long is founded. Bolckow, Vaughan & Co Ltd. acquire the Southbank Steelworks. The firm is also persuaded by Sydney
County Borough of Teesside two-tier system of counties and districts. One of the new counties "Area No.4" was based on the Teesside conurbation. The county was eventually named Cleveland on the suggestion of several local authorities in the area. Originally it was intended that Teesside would continue as non-metropolitan district of Cleveland. Peter Walker, Secretary of State for the Environment stated in January 1972: "It would be wholly wrong... to divide again the County Borough of Teesside... it has made all its investment in a county borough of that size, and it would be wholly wrong to tear it to pieces." However, the boundaries