Phase II of the James Bay development included the La Grande-1 and Laforge-1 power stations and reservoirs, as well as the addition of the La Grande2A, Laforge2 and Brisay generating stations on La Grande 2 (now called Robert-Bourassa), Laforge 2 and Caniapiscau reservoirs, which were created during the first Phase of the complex.
Phase II cost $5,168 million to complete, not including expenditures associated with the power transmission grid infrastructure.