Denby; Denby Hall Colliery; FL 1876-1967; coal mine
Hartshay, Ripley; Upper Hartshay Colliery; fl 1835-1934; coal mine
Marehay; Marehay Colliery; 1854-1936; coal mine
Ripley; Butterley Company; 1790-2009; iron manufacture, engineeing, colliery and brick company
Strutt family of Belper