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Cefn Coed Colliery Museum




Cefn Coed Colliery Museum is a former South Wales coal mine, now operating as a museum.

Coal mining in the Neath area began with the development of the port of Neath in the 16th century. In 1743 Sir Herbert Mackworth began mining at Onllwyn, with production rising with the opening of the Neath and Brecon Railway in 1864. David Bevan opened a pit a Blaendulais in 1872, naming it the Seven Sisters after his seven daughters. The Evans-Bevan family then began exploiting the Swansea Valley from the 1870s, and by nationalisation in 1947 owned seven collieries within seven miles of each other.

Cefn Coed Colliery was opened as an anthracite colliery by the Llwynonn Colliery Company during the 1920s. Three attempts were unsuccessfully made to sink shafts at Cefn Coed, but it was not until the Llwynonn Colliery company was bought out by the Amalgamated Anthracite Combine of Ammanford in 1926 and high capital investment mad, that a break was made in the hard Blue Pennant sandstone. The first coal raised in 1930, with the shaft and workings powered by a steam engine, fueled by the gas form then old workings.

Like much of western South Wales, the coal was high quality anthracite. The best coal came from the deepest seam called Big Vein, broken into at a depth of 750 yards. Cefn Coed during its working life at depths of over 2,500 feet (800m), was the deepest anthracite mine in the world. Other shafts worked at Cefn Coed included: Peacock, White Four Feet and the Nine Feet. Brammallite was identified in the Dulais seam, by X-ray diffraction by the Natural History Museum, London; making Cefn Coed one of only two sites in all of Wales for Brammallite. However, at such depths and with frequent accidents due to methane gas and roof falls, the pit and it soon gained the unenviable nickname of "The Slaughterhouse."

By the end of World War Two in 1945 there were 908 men employed. Nationalised by the National Coal Board, continual investment was required to combat the need to keep roadways open at the extreme depths. Changing economics lead to a reduction in the workforce from the 1950s, and the mine ceased production in 1968.

A majority of the men were transferred to the new Blaenant drift mine, built to extract coal form the the No.2 Rhondda seam at a shallower depth. One of the two shafts at Cefn Coed was used to ventilate Blaenant, and as an emergency exit, until the closure of Blaenant in 1990.

The complete above ground mine workings remain intact on site, with the steam winding engine from No.2 shaft now electrically driven.

Manufactured in 1927, the Worsley Mesne steam winding engine sits in the boiler house with its suite of six Lancashire steam boilers. The engine has two cylinders with with a bore of 32 inches, while the drum is 10ft wide. The drum held two ropes each over 800 yards long, with a breaking strain of 234 tons. The ropes were inspected everyday, weight tested every three months and replaced completely every 2� years. Every six months they were shortened by about 6 feet in order to eliminate wear and stress at the end of the rope.

There is no access to the underground workings within the museum, but a simulated gallery provides full accessibility for blind and disabled visitors. As well as artefacts from the mining industry, the museum also houses a restored and unique gas tram, which ran in Neath until 1920.

The museum is an anchor point on the European Route of Industrial Heritage.

    Address Address:

    Cefn Coed Colliery Museum,
    Neath Road,
    South Wales, SA10 8SN

    Telephone Telephone:

    01639 750 556

    Wensite Website:

    Admission Charges Admission Charge:-

    As with all national and state museums in Wales, access to all is free

    Opening Hours Hours:

    April to September: daily 10.30 to 18:00, Last entry 16:30
    October to March: daily 10.30 to 16:00, Last entry 15:00

    Facilities for the Disabled Facilities for the Disabled:

    Most of the site is accessible to disabled visitors. Disabled toilets on site and Guide Dogs welcome.


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