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In page Sunderland:

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Sunderland, part of the Durham coalfield, has a coal-mining heritage that dates back centuries. At its peak in 1923, 170,000 miners were employed in County Durham alone,[7] as labourers from all over Britain, including many from Scotland and Ireland, entered the region. As demand for coal slipped following World War II, mines began to close across the region, causing mass unemployment. The last coal mine closed in 1994.[8] The site of the last coal mine, Wearmouth Colliery, is now occupied by the Stadium of Light, and a miner's Davy lamp monument stands outside of the ground to honour the site's mining heritage. Documentation relating to the region's coalmining heritage are stored at the North East England Mining Archive and Resource Centre (NEEMARC).