| / /1859 | Baileys Tramroad
Conveyed to the Merthyr, Tredegar and Abergavenny Railway by J.&C. Bailey (Joseph Bailey and Crawshay Bailey). |
| 01/08/1859 | Merthyr, Tredegar and Abergavenny Railway
Company incorporated. Backed by Crawshay Bailey of Nantyglo Iron Works, James Hill of Blaenavon Iron Works and Thomas Brown of Ebbw Vale Iron Works. Engineer; John Gardner. |
| 18/06/1860 | Merthyr, Tredegar and Abergavenny Railway
First sod cut. |
| 08/11/1861 | Merthyr, Tredegar and Abergavenny Railway
Agreement reached for lease for 1000 years by the London and North Western Railway. |
| 07/08/1862 | Merthyr, Tredegar and Abergavenny Railway
Lease agreement with London and North Western Railway confirmed by Act. |
| 29/09/1862 | Merthyr, Tredegar and Abergavenny Railway
Opened from Abergavenny to Brynmawr. |
| 01/10/1862 | Merthyr, Tredegar and Abergavenny Railway
Abergavenny Brecon Road opened. |
| 01/10/1862 | Merthyr, Tredegar and Abergavenny Railway, London and North Western Railway
London and North Western Railway takes possession of the Merthyr, Tredegar and Abergavenny Railway. |
| / /1863 | Newport, Abergavenny and Hereford Railway
West Midland Railway builds platforms north of the south facing junction with the Merthyr, Tredegar and Abergavenny Railway. |
| / /1866 | Merthyr, Tredegar and Abergavenny Railway, London and North Western Railway
Merthyr, Tredegar and Abergavenny Railway bought by the London and North Western Railway. |
| / /1867 | London and North Western Railway
Act for north facing junction at Abergavenny for the Merthyr, Tredegar and Abergavenny Railway. |
| / /1867 | Merthyr, Tredegar and Abergavenny Railway
Engine shed at Abergavenny Brecon Road opened. |
| 22/06/1870 | Merthyr, Tredegar and Abergavenny Railway
North facing junction at Abergavenny opened. New station opened at junction and 1863 station closed and replaced by sidings. |
| / /1877 | Merthyr, Tredegar and Abergavenny Railway
Line doubled between Abergavenny and Brynmawr requiring new tunnel bores at Clydach and Gelli Felen. |
| / /1896 | Merthyr, Tredegar and Abergavenny Railway
Abergavenny engine shed enlarged. |
| /12/1927 | Merthyr, Tredegar and Abergavenny Railway
14 locomotives snowed in along length of line. Train snowed in at Nantybwch for 12 hours at 1165 feet. |
| /11/1954 | Merthyr, Tredegar and Abergavenny Railway
Abergavenny engine shed becomes sign-on point. |
| 22/11/1954 | Merthyr, Tredegar and Abergavenny Railway
Closed to through freight. |
| 04/01/1958 | Merthyr, Tredegar and Abergavenny Railway
Abergavenny engine shed closed. |
| 06/01/1958 | Merthyr, Tredegar and Abergavenny Railway
Abergavenny Brecon Road closed. |
| 06/01/1958 | Merthyr, Tredegar and Abergavenny Railway
Closed to passengers. |
| 05/04/1971 | Merthyr, Tredegar and Abergavenny Railway
Short remaining part of branch from Abergavenny Junction to Abergavenny Brecon Road closed to freight. |
