According to different books there are different values given for length of transmission lines.

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Beach communities are burying powerlines to help in hurricanes

Empty Ski Gondola Gets Caught on Powerlines in Bulgaria

Snowplow Squirrel Cleans Powerlines

Mylar Balloon Luckily Slips Through Powerlines

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Replacing powerlines after taking damage from Dorian

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Removing dead tree from Powerlines

Downed powerlines cause widespread outages in Bullhead City

NSW government earmarks hundreds of kilometres of powerlines, but landowners say their land will be irreversibly damaged

Tree Collapses Over Powerlines During Huge Storm

Think your cables are messy? Vietnam powerlines have nightmare knots

Possum short-circuits powerlines in Helensburgh | February 3, 2023 | Illawarra Mercury

Virginia Powerlines

Why don't birds get electrocuted by powerlines?

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Hypnotic cable reel shears ice off powerlines in Greenland