Dartford Cable Tunnel | |
---|---|
Location | |
Country | UK |
Coordinates | 51°28′5″N 0°14′58″E / 51.46806°N 0.24944°E |
Ownership information | |
Owner | National Grid plc |
Construction information | |
Commissioned | 2004 |
Technical information | |
Type | Underground tunnel |
Type of current | AC |
AC voltage | 400 kV |
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.[1][2][3] It was built in 2003–04 at a cost of £11 million (equivalent to £22 million in 2023).[4][5]
51°27′58″N 0°15′25″E / 51.466°N 0.257°E