Heath; Hardwick Colliery Company Limited; 1840-1947; colliery company
Mapperley; Mapperley Colliery Company Limited; 1885-1947; colliery company
Mapperley; Mapperley Colliery; 1872-1965; coal mine
Ripley; Butterley Company; 1790-2009; iron manufacture, engineeing, colliery and brick company
Bryan Donkin Company Ltd of Chesterfield, engineering firm