RE:Posted by teevee!maps of the last decade don't show an LaGrande-5 or LaGrande-6, but they show La Forge 1 and La Forge 2, east of La Grande 4.
Maybe LG-5 and LG-6 were renamed LaForge-1 and LaForge-2? Do you think they were separated into a different project, maybe because QH has no schedule or certainty for building them?
This link, if it works, is to a 2002 may from or for Hydro Quebec:
[url=https://https://www.google.com/imgres?imgurl=https%3A%2F%2Fvineyardgazette.com%2Fsites%2Fdefault%2Ffiles%2Farticle-assets%2Fmain-photos%2F2010%2Fhydro_power_quebec.jpg&tbnid=F2fT-DqaDCDzJM&vet=12ahUKEwjAuubWuPWAAxW5GTQIHV8nAFkQxiAoBnoECAAQJg..i&imgrefurl=https%3A%2F%2Fvineyardgazette.com%2Fnews%2F2010%2F12%2F02%2Fproposal-would-pipe-hydro-electric-power-quebec-you&docid=_XNxsjxwbwTetM&w=900&h=1176&itg=1&q=geologic%20map%20La%20Grande-%20Quatre%20Quebec&ved=2ahUKEwjAuubWuPWAAxW5GTQIHV8nAFkQxiAoBnoECAAQJg]2002 map from Hydro Quebec[/url]
https://www.google.com/imgres?imgurl=https%3A%2F%2Fvineyardgazette.com%2Fsites%2Fdefault%2Ffiles%2Farticle-assets%2Fmain-photos%2F2010%2Fhydro_power_quebec.jpg&tbnid=F2fT-DqaDCDzJM&vet=12ahUKEwjAuubWuPWAAxW5GTQIHV8nAFkQxiAoBnoECAAQJg..i&imgrefurl=https%3A%2F%2Fvineyardgazette.com%2Fnews%2F2010%2F12%2F02%2Fproposal-would-pipe-hydro-electric-power-quebec-you&docid=_XNxsjxwbwTetM&w=900&h=1176&itg=1&q=geologic%20map%20La%20Grande-%20Quatre%20Quebec&ved=2ahUKEwjAuubWuPWAAxW5GTQIHV8nAFkQxiAoBnoECAAQJg