Penmachno quarry

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Penmachno
The Rhiw Fachno Quarry aka Chwarel Cwm - geograph.org.uk - 568720.jpg
View of the Penmachno quarry from the north-west, in 2007
Location
Conwy UK location map.svg
Schlaegel und Eisen nach DIN 21800.svg
Penmachno quarry
Location in Conwy
Locationnear Cwm Penmachno
County Conwy County Borough
Country Wales, UK
Coordinates 53°00′18″N3°51′35″W / 53.005111°N 3.859802°W / 53.005111; -3.859802 Coordinates: 53°00′18″N3°51′35″W / 53.005111°N 3.859802°W / 53.005111; -3.859802
grid reference SH7522046962
Production
Products Slate
Type Quarry
History
Openedc.1818 (1818)
Activec.1818-1909; 1909-1962
Closed1962 (1962)
View of the infilled main pit from the south. The outline of the northern mill can be seen just beyond the two remaining buildings View down to the infilled and landscaped lower pit of Rhiw Fachno Quarry - geograph.org.uk - 598469.jpg
View of the infilled main pit from the south. The outline of the northern mill can be seen just beyond the two remaining buildings
Penmachno quarry around 1875, showing the northern mill Penmachno quarry NLW3361499.jpg
Penmachno quarry around 1875, showing the northern mill

The Penmachno quarry (also known as Cwm Machno quarry, Rhiwfachno quarry, [1] or Tan-y-Rhiw quarry) was a slate quarry near Cwm Penmachno, Conwy, North Wales. It was directly below the Rhiwbach Quarry. It was worked between 1818 and 1962. [2]

Contents

History

The quarry was originally known as the Tan-y-rhiw quarry, and it was recorded working in 1818. [2]

By 1872, the quarry was employing 72 workers, rising to 178 in 1898 at its peak. [3]

In 1909, the quarry stopped working for two weeks due to a general depression in the price of slates. [4]

In 1937, Penmachno employed 108 quarrymen. It continued working after the Second World War, eventually closing in 1962. [3]

Transport

Unlike most Welsh slate quarries, it had no railway connection to the outside world, and most of the slate it produced was taken by horse-and-cart to a wharf on the River Conwy at Trefriw. In 1868, the LNWR opened their line to Betws-y-Coed and from that date onwards slate could be hauled there, which was still a distance of nearly 7 miles (11 km) over rough mountain roads.

In the first decade of the 20th century a traction engine was purchased to haul the carts. This arrangement was later replaced by lorries. [2] Some slate was hauled up to Rhiwbach Quarry and taken out to Blaenau Ffestiniog over the Rhiwbach Tramway. There were proposals to link Penmachno and Rhiwbach quarries by tramway, but these proposals were never implemented. [3]

Internally, the quarry had a number of 2 ft (610 mm) gauge tramways and inclines. During the later years of operation a Motor Rail Simplex locomotive was purchased to work the lower tramway. Several proposals were made to connect the quarries by rail.

Geography

The quarry was near the head of the isolated valley of the River Machno, above Penmachno village. Its height on the mountain meant it had a relatively restricted water supply, and on several occasions work stopped due to drought, including in 1891. [5] It was worked as a series of galleried pits, as well as underground chambers. [3]

The highest point of the quarry was just above 1,000 feet (300 m) above sea level. The mills level, at the lower end, was at 609 feet (186 m) elevation. There were originally two pits, the upper working was known as Rhiw Fachno and the lower one was the main Cwm Machno quarry. Adits lead into the mountain from both pits to access the underground workings. About 25 feet (7.6 m) above the Rhiw Fachno pit was the quarry reservoir. [6]

Geology

The five main veins of Ordovician slate that pass through Blaenau Ffestiniog are the North, Back, Narrow, Main (or Old) and South (or New) veins. [7] As they head eastwards, the lower three thin out and disappear, so that by the time Cwt y Bugail Quarry is reached, only the North Vein and Back Vein are left. Immediately to the east of the Cwt y Bugail main adit, the strata are cut by the Dolwyddelan fault, and the same two veins re-appear at Rhiwbach and Penmachno, some 0.6 miles (1 km) further to the south east, and at a considerably lower altitude. [8]

Bardic chair

The chair for the 2019 National Eisteddfod of Wales, held near Llanrwst, was made from slate from Penmachno quarry. [9]

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References

  1. "Accident". North Wales Weekly News. 24 December 1909.
  2. 1 2 3 Richards, Alun John (1999). The Slate Regions of North and Mid-Wales and Their Railways. Gwasg Carreg Gwalch. ISBN   978-0-86381-552-2.
  3. 1 2 3 4 Leighton, David (27 January 2015). "CWM MACHNO SLATE QUARRY;PENMACHNO SLATE QUARRY (40535)". Coflein. RCAHMW.
  4. "The North Wales Weekly". Carnarvon and Denbigh Herald. 13 August 1909.
  5. "Penmachno". Carnarvon and Denbigh Herald. 1 May 1891.
  6. Merionethshire IV.NE (Map). Ordnance Survey. 1887.
  7. Lewis, Michael; Denton, John (1974). Rhosydd Slate Quarry. The Cottage Press.
  8. Lewis, M.J.T. (2003). Blaen y Cwm and Cwt y Bugail Slate Quarries. Adit Publications. ISBN   978-0-9522979-3-2.
  9. Davies, Shaun (4 August 2019). "An 'honour' for Gwenan to make the 2019 Eisteddfod Chair". North Wales Chronicle.