Unthank Colliery
Colliery Management (prior to 1970)
| Year | Pit | Position | Name | No. & Class of Certificate |
| 1882 | | Manager: | John Drummond | |
| 1894 | | Manager: | John Drummond | No cert. |
| 1896 | | Manager: | John Drummond | No cert. |
| 1900 | | Manager: | John Drummond | No cert. |
| 1902 | | Manager: | John Drummond | No cert. |
| 1905 | | Manager: | Robert Stokoe | No cert. |
| 1910 | | Manager: | Robert William Stokoe | No cert. |
| 1915 | | Manager: | R. W. Stokoe | No cert. |
| 1921 | | Manager: | J. H. Bell | No cert. |
| 1923 | Black House Drift | Manager: | J. H. Bell | No cert. |
| 1924 | Black House Drift | Manager: | J. H. Bell | No cert. |
| 1925 | Black House Drift | Manager: | J. H. Bell | No cert. |
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