THE DURAND GROUP

The “Double Crassier” viewed from the Project Site
Project: "The Copse" tunnel system

Location:  Loos en Gohelle, Pas de Calais, France

Description: Excavation and investigation of a British multi-level tunnel system containing listening and fighting galleries, a brigade battle headquarters
and several internal and external shafts, from one of which the Durand Group is currently attempting to access the 'Deep Deep' level (DD) 40 metres below.

Context: After the unsuccessful and costly battle at Loos in October 1915 - the first major British offensive of the war - 173 Tunnelling Company, Royal
Engineers began sinking shafts and driving galleries to counter an enemy mining initiative immediately to the south and east of the village.  From January
1916 to April 1917 they waged war underground on three levels - Main, Deep and Deep Deep in the Hill 70 - Copse - Double Crassier area, supported by
the newly raised 258 Tunnelling Company RE who deployed in April 1916.

This mining sector, together with Hulluch to the North, was then taken over by 3rd Australian Tunnelling Company until September 1918. By that time the
enemy mining threat had ceased completely and the front was relatively quiet.

Overview: The intention and main objective is to enter into what is known as the deep Deep Mining System. Previous investigations have located two
shafts referred to as Shaft 1 and Shaft 2. It is known at least that Shaft 2 connects into the system and it is assumed that Shaft 1 does.

Educational resources: In addition to our work in the tunnels we are currently preparing informational material for the museum of the Association sur les
Traces de la Grande Guerre in Loos-en-Gohelle, including artefacts and permanent and mobile displays.

The “Double Crassier” viewed from the Project Site
Click on any image below to enlarge photo
Old Quarry (filled in)
Shaft 2
Shaft 1
MAIN 
SUBWAY
FIGHTING TUNNELS
Gallery
The Tunnel Entrance
The Bottom of the
Entrance Incline
Cul de sac laterals
Hover over here to display picture & information Hover over here to display picture & information Hover over here to display picture & information Hover over here to display picture & information Hover over here to display picture & information Hover over here to display picture & information Hover over here to display picture & information

Interactive Tunnel Map - Take a virtual tour

Use your mouse to hover over the camera icons on the map & display a picture with information Use your mouse to hover over the camera 
icons to display a picture & information
This symbol shows where the picture is taken and 
the arrows shows the direction in relation to the tunnel.
How to use the map
The Main Subway
The Start of  the
Fighting Tunnels
A Gallery
& Artefacts
The Top of the
Vertical Shaft
The Quarry
Loos - The Copse Tunnel
A fighting tunnel.
A view of the vertical shaft
leading to the deep deep
System.
Looking down to the
vertical shaft entrance.
A map of the
underground Brigade HQ.
The Durand Group Project team.
The tunnel entrance.
The bottom of the
Entrance stairway.
Setting up on site.
A subway tunnel.
A tunnel lit
by candlelight.
Artefacts in the tunnel system.
Image Gallery
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To Contact The Durand Group email: thesecretary@durandgroup.org.uk