Glynrhonwy quarries
Two adjacent former slate quarries in Carnarvonshire, Wales
From Wikipedia, the free encyclopedia
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.
SH 563 607
The west wall of the upper pit of Lower Glynrhonwy Quarry | |
  Glynrhonwy Location in Gwynedd | |
| Location | |
|---|---|
| Location | near Llanberis |
| County | Carnarvonshire (now Gwynedd) |
| Country | Wales |
| Coordinates | 53°07′25″N 4°08′53″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]
