Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/553 | Plans of workings at Ordnance Survey National Grid Reference NS 26/9075 Greyrigg Colliery, Blackbraes Colliery, Blackrigg Pit, Blackbraes Pit, Greyrigg Pit, Craigrad Pit, Redding Pits and Gutterhole Shaft noted on these plans. | 1956-1963 |