Barhale Secures £12.5M Tunnel Inspection and Maintenance Program
Thames Water has appointed Barhale to deliver a £12.5M program of statutory tunnel inspection and maintenance across key infrastructure including the Thames Water Ring Main (TWRM) and North London Abstraction and New River Zone raw water assets. The projects, awarded under the AMP8 Tunnels and Aqueducts program, will also include the production tunnels within Thames Water’s treatment works, bringing the total length of tunnels under inspection to almost 48 kilometers. On the TWRM, civil engineering, infrastructure and tunneling specialist Barhale will use mainly man entry with some limited Remotely Operated Vehicles (ROV) to inspect 12 sections of the tunnel at depths of up to 65m, representing around 20% of the asset’s extent. At the North London Abstraction and New River Zone, Barhale will carry out 24 inspections concentrated around the Lee Valley reservoir complex. The varying diameter tunnels are buried up to 50m deep and range from 30m to 5,450m in length. The overal...