400kV Thames Crossing
The 400 kV Thames Crossing is an overhead power line crossing of the River Thames, between Greenhithe Marshes in Swanscombe, Kent, and West Thurrock, Essex, England. Its towers are the tallest electricity pylons in the UK.Template:Citation needed
The present crossing was built in 1965, and comprises two 190-metre (623 feet) tall lattice towers either side of the Thames. Some suggest that the choice of this height was deliberate, being just taller than the BT Tower in London. The span is 1372 metres (4501 feet), the minimum height of the conductors over the river is 76 metres (249 feet). Each tower has three crossarms and carries two circuits of 400 kV three-phase AC.
132 kV Thames Crossing
There was at one time an earlier and nearby 132 kV crossing, with towers 148.4 metres tall. Linking Dagenham and Crossness, being built between 1927 and 1932, and was part of the Belvedere-Crowlands 132/33/25kV Double circuit. With the cessation and retirement of generation at Belvedere this line was later dismantled in 1987.
In March 2006, Paul Smith-Crallan attempted to BASE jump from a platform on the Swanscombe Tower. The parachute he was using is believed to have failed to open, causing him to plunge to his death. This tower is a popular base jumping location because of two platforms that provide good launch points.
- Aust Severn Powerline Crossing
- List of spans
- Powerline river crossings in the United Kingdom
- Crossings of the River Thames