The station was originally fairly large and built adjacent to the Dynevor tinplate works and included station buildings, signal box, freight yard and from 1931 a small railway locomotive shed. The signal box is the only surviving example on the HoW route and since 1986, it has supervised the entire line north of here to using a system of working known as No Signalman Token Remote. It is also a 'fringe box' for the power box at, which controls the line south from here towards and supervises access to the freight branch to Gwaun-cae-Gurwen. The Llanelly Railway first reached the village as long ago as 1839, continuing eastwards to Garnant following within a year and the main line being extended to Duffryn in May 1841. The station on the current site was first built at this time, although it has undergone several significant alterations since then. Brynamman would be reached in 1886, some 45 years after the opening of the mineral line from Garnant to Gwaun-cae-Gurwen, whilst the network of routes reached from Pantyffynnon would be completed in 1922 with the opening of the short branch to the colliery at Abernant. This was planned to be a through route to connect the coalfield with the Swansea District Line but was never completed. Neither it nor the GcG branch was ever used by passenger services, even though a number of stations were built on both lines. The old Brynamman branch closed to passengers in August 1958 and the old branch platform has been disused since then. The former northbound platform is also derelict - this was abandoned in March 1966 after the closure of the former North signal box. The station's Grade II listed historic waiting room was restored by Network Rail with support from Carmarthenshire's Built Heritage Team and a significant grant funding from the Railway Heritage Trust. A plaque was unveiled at the station on 19 January 2018. Network Rail was awarded the Railway Heritage Trust Conservation Award for the ‘best restored structure’ at the National Rail Heritage Awards.
Facilities
The station is unstaffed and has no ticket machine, so all tickets must be purchased on the train or in advance of travel. The main building is Grade II-listed and dates from 1857, but had been disused since the 1960s - it was restored and refurbished by Network Rail in 2013-14. It is provided with the standard amenities - help point, CIS screen, payphone and timetable poster board. Step-free access is available from the level crossing at the north end - this still has manually-operated metal gates rather than the automatic barriers used elsewhere on the line.
Services
All trains serving the station are operated byTransport for Wales, who also manage it. There are four trains a day to Shrewsbury northbound from Monday to Saturday and five southbound to Llanelli & Swansea ; two services each way call on Sundays.
Amman Valley branch
The old Amman Valley branch line through Ammanford and Gwaun-cae-Gurwen which joined here to the other side of the current platform was closed in its entirety along with the yard after the closure of Abernant Colliery in 1988. The railway shed and turntable are also gone, with nothing to reveal their former existence. The junction was reinstated for freight services only in 2006 as EWS requested that part of the line be reinstated to serve the opencast site at Tairgwaith Colliery. The Amman Valley Railway Society has also been attempting to reinstate the Amman valley line as a heritage railway, although EWS plans prevent this in the short term. EWS started running coal trains to Gwaun-Cae-Gurwen in 2009, using EWS Class 66 locomotives and MEA open box wagons.
