© Crown Copyright: image reproduced with the permission of the Controller of Her Majesty’s Stationery Office.
Tunnel Quarry was one of the four sub-depots of the Central Ammunitions Depot, parts of the converted Bath stone quarry are still security classified sites today. The quarry connects to the northern edge of Spring Quarry and also had a link to the GWR main line at the eastern portal of Brunel's Box Tunnel.
Posted by Higgypop Admin last updated Tue 19 Aug 2008 at 15:46
Corsham, Wiltshire, United Kingdom
Grid reference: ST854693
No access - this is an active Ministry of Defence site.
Visited by 2 explorers
Photos of Tunnel Quarry
Tunnel Quarry history
Located South-East of Bath, Tunnel Quarry forms part of the converted stone quarry tunnel complex beneath JSU Corsham (formerly known as RAF Rudloe Manor).
The quarry was acquired by the War Department after being used to extract building stone for the last century. The quarry was extensively converted, regular storage bays were created, the floor was flattened and air conditioning and lighting was fitted through out.
The regular conditions were needed as Tunnel Quarry formed part of the Central Ammunition Depot, an amazing labyrinth of tunnels and chambers, around one hundred feet below ground covering an area of around 200 acres in four sub-depots, which between them housed over 350,000 tons of ammunition.
At the eastern portal of Brunel's Box Tunnel, a branch line from the main London to Bristol railway line leads into the heart of the depot and terminates at a half-mile long underground railway station. Most of the underground area is now abandoned. The quarry is still strictly controlled by the MOD as several areas are still classified including the Command and Control Computer Centre (CCC) in the eastern part of the quarry, which is accessible via lift from a discreet bunker style entrance in Peel Circus. Another area known as South-West Control is also still in use at the opposite end of the quarry, this area was originally set a side as storage district 1 but it was never converted, it was later converted it to a telephone exchange and switching room, it's current day use is unknown.
- Secret Underground Cities - Nick McCamley - pages 17, 20, 22, 29, 42, 103, 134, 165, 252
- Secret Cold War Nuclear Bunkers - Nick McCamley - pages 99, 256-257, 274
- Saving Britains Art Treasures - Nick McCamley - pages 46
- Secret Underground Bristol - Sally Watson - pages 58, 60
New to Nettleden?
Join our gang of urban explorers, get started by creating your free account...
- The secret sights of London
Discover abandoned and long forgotten secret bunkers, hideouts and derelict building in London.
- Secret underground bunkers in the UK
Discover some of the UK government's best kept secrets. From a little known hidden nuclear bunker Wiltshire to the huge active secret bunker right under Central London.
- Royal Observer Corps posts
ROC was given the responsibility of reporting nuclear attacks from hundreds bunkers across UK.
- Corsham quarries
A list of the quarries in and around Corsham.
- Disused London Underground stations
A list of disused stations on the London Underground.
- Brean Down Fort
The fort was built between 1864 and 1871 on the recommendations of the 1859 Royal Commission. Originally armed with seven 7" RMLs, it was disarmed in 1901, but rearmed with two 6" ex-naval guns during World War II. Recently restored and opened to the public by the National Trust.