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Copthall Green Tunnel will be located within the London Borough of Hillingdon, between Harvil Road in the west and Breakspear Road South in the east. The 880-metre-long tunnel sits between the twin bored Northolt Tunnel and the Colne Valley Viaduct.
The Copthall Tunnel is one of five green tunnels on the HS2 route, which are shallower tunnels that will be finished with trees, plants, and shrubs on top – helping them blend into the natural landscape. Materials from the excavation are kept on site and then reused on the tunnel surroundings, reducing movement of spoil.
The Northolt Tunnel will carry passengers between Old Oak Common Station and West Ruislip, where the high-speed railway emerges from underground.
Four tunnel boring machines (TBMs) are being used to excavate the tunnel. TBMs Sushila and Caroline were launched in late 2022 to dig the 5-mile (8km) western section, while TBMs Emily and Anne set off in 2024 from Victoria Road Crossover Box to create the 3.4-mile (5.5km) eastern section towards Green Park Way. Making it the second longest tunnel on the new railway after one recently excavated beneath the Chiltern Hills.
The Euston Tunnel will carry high-speed trains between London Euston Station and Old Oak Common Station. The 4.5-mile (7.2km) twin-bore tunnel will reach depths of up to 50m below ground. It will be excavated using two tunnel boring machines (TBMs), Karen and Madeleine, which will be launched from the eastern section of HS2’s Old Oak Common Station.
Weighing an incredible 1,250 tonnes, each of the tunnel boring machines (TBMs) will launch from an underground box at one end of the project’s Old Oak Common station. They are expected to take around one and a half years to complete their drives.
The site will be the beating heart of the logistics operation for HS2 in London, and will be where critical construction materials, such as over 100,000 pre-cast tunnel segment rings, will be delivered. At peak operation, eight trains per day will depart and arrive at the logistics hub, maximising the use of rail freight in the construction of HS2 in London and resulting in one million lorry movements not going on UK roads.
The London Logistics Hub sits on the old Freightliner Terminal site that first opened in 1967.. The site’s connections to the conventional railway make it an ideal location to coordinate HS2’s London logistics operation.
HS2’s construction will continue to support thousands of jobs, benefit UK businesses of all sizes, and lay the foundations for the arrival of more new rail services into the next decade and beyond.
Euston Tunnel: 4.5 miles (7.3km) Northolt Tunnel: 8.4 miles (13.6km) Copthall Green Tunnel: 0.55 miles (0.8km)
Our twin-bore tunnels, each containing a single rail track, are constructed using tunnel boring machines (TBMs). Our green tunnels will be built using the cut-and-cover method of construction, with trees and shrubs then planted on top.
Innovation is the adoption of new products, procedures, or methods not seen in the construction and railway industries before. These technologies may be new to the market or may have been adapted from other industries in order to benefit our people, places and local community.
Innovation is to help deliver differently by providing a benefit beyond industry best practise and drive efficiencies across the project.
Whether you thrive in a dynamic environment or enjoy a challenge, come and join our diverse and inspirational teams. SCS JV is a place where you can develop personally and professionally so come and join us.
Joining SCS, you will have the opportunity to join our growing community of almost 100 EDI Champions who support us to have an inclusive environment, where everyone can be their true selves. We also have opportunities to volunteer within local schools to inspire the next generation of talent and contribute to the positive legacy we want to leave.
