There are a number of substantial overhead powerline

Overhead powerline

An overhead power line is an electric power transmission line suspended by towers or utility poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric energy...

 river crossings in the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

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The tallest electricity pylons in the UK are those of the 380kV Thames Crossing

380kV Thames Crossing

There are a number of substantial overhead powerline river crossings in the United Kingdom.The tallest electricity pylons in the UK are those of the 380kV Thames Crossing, at West Thurrock, which are 190 m high. These were constructed by BICC in 1965...

, at West Thurrock

West Thurrock

West Thurrock is a traditional Church of England parish and town in Thurrock, Essex, England, located 17.5 miles east south-east of Charing Cross, London.-Location:...

, which are 190 m (630 ft) high. These were constructed by BICC

British Insulated Callender's Cables

British Insulated Callender's Cables was a 20th century British cable manufacturer and construction company, now renamed after former subsidiary Balfour Beatty.-History:...

 in 1965. The cables stretch 1300m (4,500 ft) across the River Thames

River Thames

The River Thames flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom. While it is best known because its lower reaches flow through central London, the river flows alongside several other towns and cities, including Oxford,...

 and have a minimum clearance of 76 m (250 ft).

The longest powerline river crossing in the UK is the Aust Severn Powerline Crossing

Aust Severn Powerline Crossing

Aust Severn Powerline Crossing is the longest powerline span in the United Kingdom with a span width of 1,618 m .The crossing, which spans the River Severn between Aust and Beachley, is part of the National Grid. It was built by J L Eve & Co and is situated south of Severn Bridge. It is...

 over the River Severn

River Severn

The River Severn is the longest river in Great Britain, at about , but the second longest on the British Isles, behind the River Shannon. It rises at an altitude of on Plynlimon, Ceredigion near Llanidloes, Powys, in the Cambrian Mountains of mid Wales...

 at Aust

Aust

Aust is a small village in South Gloucestershire, England, the historical site of the eastern terminal of the Aust Ferry crossing route over the River Severn between England and Wales, believed to have been used in Roman times as a continuation of Icknield Street which led from Eastern England...

, stretching 1700m (5,310 ft) between towers 148 m (488 ft) high.

The 380kV Forth Crossing

380kV Forth Crossing

The 380kV Forth Crossing is the tallest electricity pylon in Scotland. It stands next to the Clackmannanshire Bridge and the Kincardine Bridge, and crosses the River Forth....

, just upriver of the Kincardine Bridge

Kincardine Bridge

The Kincardine Bridge is a road bridge crossing the Firth of Forth from Falkirk council area to Kincardine-on-Forth, Fife, Scotland.-History:The bridge was constructed between 1932 and 1936, designed by Donald Watson...

, in Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

, has a span of about 1130m (3,700 ft) over the River Forth

River Forth

The River Forth , long, is the major river draining the eastern part of the central belt of Scotland.The Forth rises in Loch Ard in the Trossachs, a mountainous area some west of Stirling...

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