Helicopters replaced transmission lines toppled by hurricane
Duke Energy used helicopter crews to replace more than 100 transmission towers in Florida
Historic hydro station turns 100
Upgrades have helped Wateree Hydro Station generating clean energy
Helicopter with saw trims trees
How Duke Energy trims trees in hard-to-reach areas
Retro photos: Storm teams
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Electric bucket trucks cleaner, quieter
Device helps reduce emissions, saves costs
