The Glynrhonwy quarries (also known as the Glyn-Rhonwy quarries) were two adjacent quarries in the Glynrhonwy area, north-west of Llanberis, in Carnarvonshire (now Gwynedd), Wales.
 The west wall of the upper pit of Lower Glynrhonwy Quarry | |
| Location | |
|---|---|
  Glynrhonwy Location in Gwynedd | |
| Location | near Llanberis |
| County | Carnarvonshire (now Gwynedd) |
| Country | Wales, UK |
| Coordinates | 53°07′25″N 4°08′53″W / 53.12361°N 4.14806°W SH 563 607 |
| Production | |
| Products | Slate |
| Type | Quarry |
| History | |
| Opened | early 1700s |
| Closed | 1930 |
They were:
- Upper Glynrhonwy quarry, known locally as "Glyn Ganol" or "Middle Glyn", which operated from 1861 to 1930,[1] and
- Lower Glynrhonwy quarry, known locally as "Captain Taylor's Quarry", which operated from the early 1700s to 25 January 1930.[2]
The quarries operated internal railways of 2 ft (610 mm) gauge and were served by Glynrhonwy Siding off the LNWR's Caernarfon to Llanberis branch.[3][4]
Lower Glynrhonwy was acquired by the Air Ministry in 1939 for munitions storage. It occupied the site until 1961.[5] During the Second World War the site generated two extra trains per day on some occasions.[6] The railway siding was taken out of use on 18 December 1956.[7]
A 100 MW pumped storage project, marketed as a "quarry battery", received approval in 2017 and as at 2019 had reached the "detailed engineering design" stage.[8][9]
References edit
- ^ Boyd 1990, p. 252.
- ^ Boyd 1990, p. 251.
- ^ Boyd 1990, p. 248.
- ^ The siding and adjacent quarrying, via National Library of Scotland
- ^ "RAF bomb disposal". digiDo.
- ^ Mitchell & Smith 2010, Map XXVIII.
- ^ Dunn 1958, p. 719.
- ^ "Green light for Welsh storage". 8 March 2017. Retrieved 14 March 2017.
- ^ "Project Status". Snowdonia Pumped Hydro.
Sources edit
- Boyd, James I.C. (1990) [1972]. Narrow Gauge Railways in North Caernarvonshire, Volume 1: The West. Headington: The Oakwood Press. ISBN 978-0-85361-273-5. OCLC 650247345.
- Dunn, J.M. (October 1958). Cooke, B.W.C. (ed.). "The Afonwen Line-2". The Railway Magazine. 104 (690). London: Tothill Press Limited. ISSN 0033-8923.
- Mitchell, Vic; Smith, Keith (2010). Bangor to Portmadoc: Including Three Llanberis Lines. Country Railway Routes. Midhurst: Middleton Press. ISBN 978-1-906008-72-7.
External links edit
- The lower quarry's entry on the National Monuments Record of Wales (NMRW)'s website
- The upper quarry's entry on the NMRW's website
- Wartime usage, on History Points
- Modern usage – Snowdonia Pumped Hydro
- Modern usage Archived 23 July 2016 at the Wayback Machine, by The Engineer
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