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The Dartford Cable Tunnel is a 2.4 km utility tunnel beneath the Thames, upstream of the Dartford Crossing. With a diameter of ~3 m (10 ft), it carries a 400 kV National Grid electrical transmission cable. It is accessible by foot as a crossing of the Thames, but by authorised personnel only. It was built in 2003–04 at a cost of £11 million (equivalent to £22 million in 2023).

See also

• 400 kV Thames Crossing
• Thames Cable Tunnel
• Utility vault
• Crossings of the River Thames
• Tunnels underneath the River Thames

References

1. "National Grid builds new Thames tunnel at Dartford". Nce.co.uk. 1 May 2003. Retrieved 15 July 2015.
2. "ABB completes Dartford Cable Tunnel HV cable installation". Voltimum.co.uk. 3 April 2006. Retrieved 15 July 2015.
3. Archived 29 October 2004 at the Wayback Machine
4. Nicolas Janberg (23 July 2014). "Dartford Cable Tunnel (Dartford, 2005) | Structurae". En.structurae.de. Retrieved 15 July 2015.
5. "New current flows under the Thames". Abb.co.uk. 15 May 2006. Retrieved 15 July 2015.

51°27′58″N 0°15′25″E / 51.466°N 0.257°E / 51.466; 0.257

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