|/ /1791||Nantyglo Iron works|
Finding the land leased too large, Hill Hopkins and Pratt sub-lease lands to Harford and Partridge.
|/ /1795||Nantyglo Iron works|
First works opened by Harford, Hill and Co. The works had two furnaces and forges.
|/ /1796||Nantyglo Iron works|
Iron works closed due to financial difficulties.
|/ /1802||Nantyglo Iron works|
Works bought by Joseph Harrison.
|/ /1811||Nantyglo Iron works|
Joseph Bailey and Matthew Wayne buy works. Improvements are made and the works re-opened.
|/ /1816||Nantyglo Iron Works|
Joseph Bailey builds two roundhouses (the Nantyglo Round Towers which were Martello towers) for the Bailey family's protection at Nantyglo. The truck system operated at the works and violent protests were not unknown.
|/ /1820||Nantyglo Iron Works|
Matthew Wayne retires and is replaced by Crawshay Bailey.
|/ /1825||Nantyglo Iron Works|
Seven blast furnaces in operation.
|/ /1829||Baileys Tramroad|
Tramroad built from Nantyglo Iron Works near Brynmawr, to Govilon on the Brecknock and Abergavenny Canal.
|/ /1833||Beaufort Iron Works|
Crawshay Bailey buys Beaufort Iron Works for £45,000. Beaufort Iron works starts to supply iron for the mills at Nantyglo Iron Works.
|/ /1844||Nantyglo Iron Works|
Lion Tin Plate Works opened.
|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.
|/ /1865||Alexandra Docks and Railway|
Alexandra Docks and Railway incorporated. Subscribed to by Lord Tredegar, Crawshay Bailey and other ironmasters from Cwmbran Iron Works, Nantyglo Iron Works, Tredegar Iron Works and Rhymney Iron Works. Act also allows construction of railways.
|/ /1871||J.&C. Bailey (Joseph Bailey and Crawshay Bailey)|
Sell Nantyglo Iron Works to Brynmawr railway to the Nantyglo and Blaina Iron Company.
|/ /1871||Crawshay Bailey|
Sells the Nantyglo Iron Works and Beaufort Iron Works for £300,000.
|31/07/1902||Brynmawr and Western Valleys Railway|
Line taken over jointly by the London and North Western Railway and the Great Western Railway as the Nantyglo and Blaina Iron Company were asking too high a price to buy their private Nantyglo Iron Works to Brynmawr railway.