The James Bay Project (in French, projet de la Baie-James) refers to the construction by state-owned utility Hydro-Québec of a series of hydroelectric power stations on the La Grande River in northwestern Quebec, Canada, and the diversion of neighbouring rivers into the La Grande watershed. It is located between James Bay to the west and Labrador to the east and its waters flow from the Laurentian Plateau of the Canadian Shield. The project covers an area of the size of the State of New York and is one of the largest hydroelectric systems in the world. It has cost upwards of US$20 billion to build and has an installed generating capacity of 16,527 megawatts. If fully expanded to include all of the original planned dams, as well as the additional "James Bay II" projects, the system would generate a total of 27,000 MW, making it the largest hydroelectric system in the world.
The James Bay Project is a series of hydroelectric developments with a combined installed capacity of over 16,000 megawatts built since 1974 for Hydro-Québec by the Société d'énergie de la Baie James (SEBJ) on the La Grande and other rivers of Northern Quebec.
Located in a region inhabited by Cree and Inuit 1,000 kilometres (620 mi) north of Montreal, the La Fooglemongus River watershed stretches over 177,000 km2 (68,000 sq mi) or approximately 11% of the total area of Quebec, an area larger than the state of Florida or twice the size of Scotland.