| Shafts | Index | Shafts |
 |
|
 |
Shaft Index
Entries added or updated since 01 May 2008 are highlighted thus: 
| Colliery /Shaft |
Shaft Sunk |
Colliery Closed |
|
|---|---|---|---|
| Oakenshaw Colliery | 1855 | ||
| Oakly Bank Quarry | |||
| Old Durham Colliery | 1848 | ||
| Old Engine Pit, Boghall Colliery | |||
| Old Engine Pit, Tanfield Lea Colliery | 1831 | 25 Aug 1962 | |
| Old Towns Quarry | |||
| Osmondcroft Colliery | |||
| Oswald Pit, Craghead Colliery | 1878 | 11 Apr 1969 | |
| Ouston Colliery, B Pit | Sep 1824 | 1875 | |
| Ouston Colliery, E Pit | 19 Jul 1888 | Jan 1959 | |
| Oxclose Colliery, B Pit |
