Simon Wood Colliery was sunk in 1869 (Gill 2007a [accessed 29/08/07]) and later became part of Elsecar Main which was opened in 1905. The colliery was worked until 1983 (Taylor 2001, 122). The colliery and spoil heaps were built on an area of piecemeal enclosure of uncertain date. There is no legibility of this landscape but significant legibility of the mine workings.