Warwick Tunnel Inspections

As part of eight₂O’s Tunnels and Aqueducts Programme, Barhale conducted the enabling works for tunnel inspections by Thames Water engineers. This included:

• Structural integrity surveys of specified tunnels
• Designing, supplying and installing secondary isolation
• Tunnels drainage and cleaning
• Primary inspection of tunnels

After Thames Water engineers inspected the tunnels, Barhale also carried out the required repairs. The scope of work covered 4 tunnels of which significant sections had been built in the 1800s. The tunnels were accessed via 5no shafts (3m ID, and depths ranging from 16 to 25m), which were located inside the reservoirs. The reservoirs themselves are situated on land that is open to public access via the Wetlands project.