| Reference | Title | Date |
| RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
| RHP146000/454 | Plans of workings at Ordnance Survey National Grid Reference NS 26/8474 Oakerdykes No.2 and No.4 Mine, WesterJaw Mine and Wester Jaw No.1 Mine noted on this plan. | 1960 |