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Aberllefenni quarries

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388:(18.3 m) vertical separation. These were bored into the valley side just to the north of the near-vertical narrow vein. Each tunnel connected to a large chamber from which the rock was extracted. These chambers ranged from 100 to 187 feet (30.5 to 57.0 m) in length with 24 to 30 feet (7.3 to 9.1 m) of rock left between the bottom of one chamber and the top of the next lower chamber. As more slate was extracted, several of the upper chambers were joined vertically to form an extremely large cavern known as Twll Golau which is open at the top. 68: 357: 61: 365: 349: 40: 1716: 973: 282:
1806, John Davies gained control which passed to the executor of his estate, Pryce Jones, in 1824. It was Davies who first organised commercial quarrying at Aberllefenni around 1810. Although only 3 workers were employed in 1825, by 1854 the quarry was producing significant amounts of slate; that year the enormous "Alma" open chamber at the top of Foel Grochan was named after the
384:, the latter of which Aberllefenni extracted. The broad vein is of considerably poorer quality than the narrow vein, and the slate it produces is of little use in roofing slates or polished surfaces. Instead it was used in walls, fences and hardcore. The narrow vein was of much better quality and could be used in much higher quality applications and fetched higher prices. 273:. It was the longest continually operated slate mine in the world until its closure in 2003. Foel Grochan is the quarry on the north side of the valley, facing Ceunant Ddu and Hen Gloddfa on the south; all three were worked as a single concern throughout their history. Rock was mainly extracted underground, though all three quarries had open pits as well. 961: 418:
After 1948, the short tramway connecting the quarries to the slate cutting shed at Aberllefenni continued in use. Although locomotives were used underground, the tramway was operated by horse haulage. This continued until the early 1960s, when a tractor replaced the horses. The tramway was removed in
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After the war, the industry continued a slow decline, with industrial action closing the quarry for part of 1947. During the 1950s only about 40 men were working, all in Foel Grochan quarry. In 1956, brothers Gwilym and Dewi Lloyd took over the quarry under the name Wincilate Ltd. Rapid modernization
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By 1879, the quarry was employing 169 men and produced nearly 4700 tons of finished slate and slab. The number of employees peaked in 1890 at 190. Production fluctuated but was trending downwards during the 1890s and 1900s. In 1908, the number of employees fell below 100 and declined further to 71 in
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Aberllefenni quarry may have started operating as early as the 14th century. The earliest confirmed date is 1500 when the local house Plas Aberllefenni was roofed in slates from the mine. In the seventeenth century the Lloyd family owned the quarry, and it passed to the Campbell family in 1725. In
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By 1850, the quarry was owned by Colonel Robert Davies Jones, and was trading under the name Aberllefenni Slate Quarries. In 1873, the quarry appointed Robert Hughes as manager, and he quickly modernised working practices there. He installed new machinery in the extended mill, powered by a large
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Slate extracted from the narrow vein at Aberllefenni is deep blue and extremely hard and dense. It resists fine splitting, so most of the mines' product was large cut slabs rather than split roofing slates. Foel Grochan mine consists of eight near-horizontal tunnels at approximately 60 feet
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One of the reasons for Aberllefenni's continued use was the high quality of the slate extracted. There are two major veins of slate running parallel to each other through this region of mid-Wales, the
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saw a downturn in production in the whole industry, including at Aberllefenni. After the war there was a short boom into the early 1920s, but then the price of slate began to fall.
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By the early 1930s, the industry was in a deep depression, with a 3-day week being worked for part of 1933. The quarry was owned by A. Hamilton Pryce, who in 1935 leased it to Sir
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However, by 2002 it was no longer economical to extract slate at Aberllefenni and the mine closed in 2003. The slate mill continues to operate, processing slate imported from
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and mechanisation of the quarry allowed it to continue to produce slate into the 1990s. Aberllefenni was the last working slate mine south of
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that served it. There was some improvement during the late 1930s, with 140 workers employed in 1940, but the
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The rear of the main mill around 1885. The quarry office is to the right of the mill building with the
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Aberllefenni welsh slate is still available but in small sizes to make nameplates and small plaques.
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which carried slate down the Dulas Valley to Machynlleth. There it was transferred to the
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and China. Small pieces of Aberllefenni slate are still available for name plates.
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the late 1970s, being replaced with lorries and forklift trucks. Underground, the
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brought further drops in production, with the number of men fell to 40 in 1944.
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Aberllefenni main level looking down from Foel Grochan, c.1979
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From 1859 the quarries at Aberllefenni were connected to the
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Greenhough, Richard S. (March 1988). "Corris Conservation".
120: 553:"For Sale: An ENTIRE Gwynedd slate quarrying village" 1627: 1598: 1549: 1494: 1440: 1371: 1327: 1288: 1214: 1155: 1026: 928: 887: 824: 741: 718: 290:waterwheel. That year the quarry employed 180 men. 217: 202: 197: 187: 177: 172: 126: 112: 102: 91: 49: 636:...a specialist supplier of all slate products... 895:George Vane-Tempest, 5th Marquess of Londonderry 352:Map of Aberllefenni area quarries and tramways 1004: 696: 8: 32: 480:. Avon-Anglia Publications & Services. 1011: 997: 989: 703: 689: 681: 31: 471: 469: 467: 465: 360:Inside the Aberllefenni mill around 1885 436: 7: 538:Liverpool Daily Post (Welsh Edition) 536:"Slate firm break into new market". 67: 476:The Corris Railway Society (1988). 27:Three slate quarries in north Wales 665:"Photos of a Walk to Aberllefenni" 502:"Abercorris and Aberdovey Railway" 25: 1773:2 ft 3 in gauge railways in Wales 1714: 971: 959: 651:from the original on 5 June 2011 643:Richard (Dick) Knight Williams. 237:is the collective name of three 66: 59: 38: 645:"history aberlleffenni corris" 602:. Industrial Railway Society. 1: 551:Hughes, Owen (23 June 2016). 1753:Industrial railways in Wales 508:. 17 August 1850. p. 4. 506:Carnarvon and Denbigh Herald 444:Richards, Alun John (1994). 600:British Small Mines (South) 1789: 540:. 28 July 1969. p. 7. 1768:Railway inclines in Wales 1708: 954: 946:Imperial Tramways Company 936:Corris Railway Grand Tour 555:. North Wales Daily News. 446:Slate Quarrying at Corris 54: 37: 1536:Rhiw-goch (Denbighshire) 1082:Fron-Boeth and Pant-Mawr 910:Edward Temperley Gourley 421:2 ft 3 in 941:Bristol Omnibus Company 448:. Gwasg Carreg Gwalch. 411:and shipped throughout 1748:Slate mines in Gwynedd 1521:Deeside and Moelfferna 373: 361: 353: 261:, just to the west of 920:Walter Rathbone Bacon 367: 359: 351: 1020:Welsh slate quarries 796:Upper Corris Tramway 598:Booth, A.J. (2001). 522:The Railway Magazine 402:narrow gauge railway 1660:Frongoch (Aberdyfi) 915:Sydney Ernest Smith 675:on 1 December 2008. 235:Aberllefenni quarry 144: /  34: 18:Aberllefenni Quarry 1142:Votty & Bowydd 1028:Blaenau Ffestiniog 826:Quarries and mines 786:Maespoeth Junction 567:"Available Slates" 478:A Return to Corris 374: 362: 354: 334:Blaenau Ffestiniog 327:Blaenau Ffestiniog 284:Battle of the Alma 1730: 1729: 1609:Dandderwen quarry 1422:Rhiw-goch (Conwy) 1299:Bryn Hafod-y-Wern 986: 985: 966:Trains portal 577:on 8 October 2011 409:Cambrian Railways 303:Henry Haydn Jones 232: 231: 16:(Redirected from 1780: 1721:Wales portal 1719: 1718: 1717: 1417:Prince Llewellyn 1280:Rhiw'r Gwreiddyn 1013: 1006: 999: 990: 978:Wales portal 976: 975: 974: 964: 963: 900:Clifton Robinson 839:Rhiw'r Gwreiddyn 761:Machynlleth Town 705: 698: 691: 682: 676: 671:. Archived from 660: 658: 656: 638: 633: 631: 613: 590: 589: 584: 582: 573:. 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The 259:Cwm Hengae 173:Production 166:SH 768 102 136:52°40′34″N 1680:Glyn-lago 1635:Bellstone 1575:Goleuwern 1451:Alexandra 1412:Hafod-Las 1353:Glyrhonwy 1329:Llanberis 1191:Hendreddu 1127:Penmachno 1092:Llechwedd 1087:Graig Ddu 1067:Cwmorthin 756:Derwenlas 743:Locations 571:Wincilate 139:3°49′23″W 107:Merioneth 1695:Rosebush 1645:Cwm Ebol 1628:Outliers 1580:Hen-Ddol 1560:Bryngwyn 1511:Cambrian 1495:Vale of 1461:Dorothea 1358:Marchlyn 1348:Dinorwic 1290:Bethesda 1245:Cambergi 1132:Rhiwbach 869:Cambergi 655:28 April 649:Archived 630:28 April 581:28 April 380:and the 313:and the 269:, North 178:Products 92:Location 50:Location 1675:Gilfach 1655:Dolgoch 1531:Penarth 1456:Cilgwyn 1338:Cefn Du 1314:Penrhyn 1275:Ratgoed 1260:Gaewern 1250:Cymerau 1201:Minllyn 1147:Wrysgan 1137:Rhosydd 1117:Oakeley 1107:Moelwyn 1062:Croesor 1057:Conglog 1032:Croesor 879:Ratgoed 874:Cymerau 338:Penrhyn 277:History 267:Gwynedd 223: ( 208: ( 198:History 113:Country 82:Gwynedd 1758:Corris 1670:Glogue 1650:Darren 1551:Arthog 1516:Clogau 1506:Berwyn 1387:Cedryn 1363:Vivian 1265:Hengae 888:People 791:Corris 751:Morben 606:  484:  452:  253:) and 218:Closed 203:Opened 192:Quarry 103:County 1541:Wynne 1377:Conwy 1373:Lledr 1164:areas 1102:Manod 1040:areas 733:No. 4 728:No. 3 271:Wales 182:Slate 117:Wales 95:near 1602:Area 1553:area 1499:area 1444:area 1427:Rhos 1407:Foel 1375:and 1331:area 1292:area 1218:area 1159:and 1122:Parc 1036:and 657:2011 632:2011 604:ISBN 583:2011 482:ISBN 450:ISBN 400:, a 225:2003 221:2003 210:1500 206:1500 188:Type 1255:Era 844:Era 286:. 1739:: 1030:, 667:. 647:. 634:. 585:. 569:. 504:. 464:^ 336:, 329:. 265:, 245:, 241:, 121:UK 119:, 1034:, 1012:e 1005:t 998:v 704:e 697:t 690:v 677:` 659:. 639:` 612:. 490:. 458:. 423:( 227:) 212:) 20:)

Index

Aberllefenni Quarry

Map of Gwynedd showing the position of the quarry
Gwynedd
Aberllefenni
Merioneth
Wales
UK
52°40′34″N 3°49′23″W / 52.676°N 3.823°W / 52.676; -3.823
grid reference
SH 768 102
Slate
Quarry
slate quarries
Cwm Hengae
Aberllefenni
Gwynedd
Wales
Battle of the Alma
First World War
Henry Haydn Jones
Bryn Eglwys
Abergynolwyn
Talyllyn Railway
Second World War
Blaenau Ffestiniog
Blaenau Ffestiniog
Penrhyn

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