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 of the proposed county of Cleveland were considerably altered, with a number of marginal areas removed. Under the revised scheme, the Teesside district would have 70 percent of the county's population, and it was felt that it would dominate the county. Accordingly, new guidelines were issued to the Local Boundaries Commission in March 1972 that was charged with drawing up district boundaries: Cleveland ""should be divided into not less than four new districts with populations comparable as is reasonably practicable having regard in particular to the pattern of local government before the establishment of the Teesside county borough"". The county