Jumb (Slate)
Colliery Management (prior to 1970)
| Year | Pit | Position | Name | No. & Class of Certificate |
| 1900 | | Agent: | J. J. Thomas | |
| 1902 | | Agent: | J. J. Thomas | |
| 1905 | | Agent: | J. J. Thomas | |
| 1910 | | Agent: | J. J. Thomas | |
| 1915 | | Agent: | J. J. Thomas | |
| 1921 | | Agent: | J. J. Thomas | |
| 1923 | | Agent: | J. J. Thomas | |
| 1924 | | Agent: | J. J. Thomas | |
| 1925 | | Agent: | J. J. Thomas | |
| 1927 | | Agent: | J. J. Thomas | |
| 1929 | | Agent: | J. J. Thomas | |
| 1930 | | Agent: | J. J. Thomas | |
| 1935 | | Agent: | J. J. Thomas | |
| 1936 | | Agent: | J. J. Thomas | |
| 1938 | | Agent: | J. J. Thomas | |
main page for Jumb (Slate)