In todays video we go deep underground and explore the worlds biggest abandoned slate mine.

History of the mine

Maenofferen slate quarry is situated near the North Wales town of Blaenau Ffestiniog, between the Manod and Moelwyn Mountains. Situated at 400m, it was first worked by men from the nearby Diphwys mine circa 1800 and by 1848 slate was being transported via the Ffestiniog Railway. This ceased in 1857 but traffic resumed shortly after as a steady flow of slate was dispatched via the railway. The quarry was initially named "David Jones" mine until it was renamed in 1861 when the Maenofferen Slate Quarry Co. Ltd. was incorporated. That year it produced around 400 tons of slate and the next year the leasing of a wharf at Porthmadog for onward distribution.

During the nineteenth century the quarry flourished and expanded, extending its workings underground and further downhill towards the nearby Blaenau Ffestiniog. By 1897 it employed over 400 people with nearly half of the men working underground. The Ffestiniog Railway continued to be the quarry's major transport outlet. However, given there was no direct connection to Ffestiniog's terminus at Duffws, slate was sent via the Rhiwbach Tramway which ran through the quarry. This put the quarry at a slight disadvantage to its rivals as it incurred extra shipping costs. In 1882, it produced 8,600 tons making it the fifth largest producer in the Ffestiniog area

It began large-scale use of locomotive power on its internal tramways from around 1900 and in 1908 the company leased wharf space at Minffordd, installing turntables and sidings, allowing finished slates to be shipped to the standard gauge railway there. Following the First World War, Maenofferen had moved up to the third largest slate producer in the Ffestiniog region and in 1918 it introduced hydro-electric power. Two years later in 1920 the company solved its high shipping costs by building a new incline connecting its mill to the Votty & Bowydd quarry. This allowed it to ship its products via that company's incline which was in turn connected to the Ffestiniog Railway at Duffws. In 1928 Maenofferen purchased the Rhiwbach quarry, continuing to work it and use its associated Tramway until 1953.

After the Second World War, fortunes declined and then in 1946, the Ffestiniog Railway ceased operation. In response, Maenofferen leased a short length of the railway's tracks between Duffws station and the interchange with the LMS railway, west of Blaenau Ffestiniog. Slate trains continued to run over this section until 1962. Maenofferen became the last slate quarry to use any part of the Ffestiniog Railway's route. From 1962 slate was shipped from the quarry by road, although the internal quarry tramways, including stretches of the Rhiwbach tramway, continued in use until at least into the 1980s.

By 1972 the mine was only employing 60 men and had an annual output of 1,200 tons. The quarry was purchased by the nearby Llechwedd quarry in 1975 and underground production at Maenofferen continued until November 1999. Production briefly recommenced via the "untopping" of underground workings to recover slate from the supporting pillars of the chambers along with the recovery of slate from the quarry tips, for crushing and subsequent use.


Documenting the decay of abandoned buildings, forgotten places, theme parks, mansions and theatres. Join me on my adventures as I capture my passion for urban exploring also known as urbex.

Check out Anthony’s channel below.
[ Ссылка ]

#Abandoned #Abandonedplaces #mines

свернуть