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What we do
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UK electricity and gas systems
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US electricity system
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UK system
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US system
Key facts
8,500 miles of overhead line
89 miles of underground cable
501 electricity substations
We own and operate an electricity transmission network spanning upstate New York, Massachusetts, Rhode Island, New Hampshire and Vermont. Our US electricity transmission facilities operate at voltages ranging from 69 kV to 345 kV.
We are the largest electricity transmission service provider in the northeastern US by reference to the length of these high-voltage transmission lines.