There are 7 major proposed transmission corridors for bringing dirty Canadian hydropower to the Northeast U.S. These will connect at the Canadian-U.S. border and then travel over 1,000 miles into remote areas of Eastern Canada through the Hydro-Quebec and Nalcor Energy network.
CHPE/Blackstone/TDI 330 miles to NYC, under the Hudson River Cost: $2.2 billion
Northern Pass/Eversource 192 miles NH to MA through the White Mountains
NECEC/Avangrid/Iberdrola 145 miles through the wilderness of Western Maine to MA
New England Clean Power Link 145 miles through Vermont
Vermont Green Line 60 miles
Empire State Connector 265 miles
Atlantic Link/Emera Subsea cable New Brunswick Canada to Plymouth MA
This map from Hydro-Quebec shows its transmission lines, megadams and generating stations.
Hydro-Quebec also connects to the Churchill Falls generating station on the Churchill (Grand) River in Labrador.
At any one time, the hydroelectricity Hydro-Quebec sends to the Northeast can be hydropower from any of its stations or even fossil fuel sources, depending on what source H-Q is deciding to use at that given moment.
As described by the consulting firm Energyzt, because H-Q is interconnected to multiple electricity markets in the U.S. and Canada, H-Q can “arbitrage between markets, buying low in one market and then reselling that energy at a higher price elsewhere.” H-Q “can buy lower cost energy where fossil fuel generators are operating, retain water in its reservoirs and then sell that water as hydropower at higher priced periods into the same or other markets….In this way, Hydro-Quebec can claim that the electricity it sells is “clean” hydropower even if it is buying fossil fuel electricity to enable those energy sales.”