Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/509 | Plans of workings at Ordnance Survey National Grid Reference NS 26/8859 Springhill Pit, Springhill Colliery, Engine Pit, Charles Street Pit, Southfield [written in pencil] and Springhill Farm noted on these plans. | c1960 |