Colin Dunlop and Company
Dates
| / /1854 | Colin Dunlop and Company The Duke of Hamilton ceases to operate the long Quarter Colliery and leases the coalfield to Colin Dunlop and Company. Quarter Collieries No 1 Pit is deepened to ironstone and lower coal. |
| / /1855 | Colin Dunlop and Company Quarter Collieries No 2 Pit and Quarter Collieries No 3 Pit are sunk. |
| / /1857 | Colin Dunlop and Company Quarter Collieries No 4 Pit partly sunk. |
| / /1858 | Colin Dunlop and Company Quarter Collieries No 5 Pit sunk. |
| / /1859 | Colin Dunlop and Company Quarter Collieries No 4 Pit fully sunk. |
| / /1863 | Colin Dunlop and Company Quarter Collieries No 6 Pit sunk. |
| / /1869 | Colin Dunlop and Company Quarter Collieries No 6 Pit (ventilation) sunk. |
| / /1870 | Colin Dunlop and Company Quarter Collieries No 1 Pit, Quarter Collieries No 2 Pit and Quarter Collieries No 3 Pit cease to be operated in the 1870s. |
| /07/1893 | Colin Dunlop and Company Quarter Collieries No 8 Pit sunk. |
