VIDEO: TVA helicopter patrols high voltage lines - WAFF-TV: News, Weather and Sports for Huntsville, AL

VIDEO: TVA helicopter patrols high voltage lines

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Helicopter crews inspect lines (Source: Tennessee Valley Authority/YouTube) Helicopter crews inspect lines (Source: Tennessee Valley Authority/YouTube)
Huntsville AL WAFF - According to the Tennessee Valley Authority, they use helicopters to patrol about 16,000 miles of transmission lines in seven states.

They released video of these patrols on YouTube on Monday, showing just how much ground their lines cover. It also shows some of the Tennessee Valley's beautiful landscapes.

The helicopter crews, along with trained linemen, inspect the entire high voltage transmission system two times a year.

They look for problems like vegetation or broken insulators.

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