Whinfield (Iron Ore)
Colliery Management (prior to 1970)
| Year | Pit | Position | Name | No. & Class of Certificate |
| 1921 | No. 1 | Agent: | S. Jenkins (Secretary) | |
| | Nos. 2 and 3 | Agent: | S. Jenkins (Secretary) | |
| 1923 | No. 1 | Agent: | S. Jenkins (Secretary) | |
| | Nos. 2 & 3 | Agent: | S. Jenkins (Secretary) | |
| 1924 | No. 1 | Agent: | S. Jenkins (Secretary) | |
| | Nos. 2 & 3 | Agent: | S. Jenkins (Secretary) | |
| 1925 | No. 1 | Agent: | S. Jenkins (Secretary) | |
| | Nos. 2 & 3 | Agent: | S. Jenkins (Secretary) | |
| 1927 | No. 1 | Agent: | S. Jenkins (Secretary) | |
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