I don't know that the dams in Canada are any better in terms of sunk organic material Williston reservoir in BC and the Manicouagan Reservoir are nearly as big

I don't know that the dams in Canada are any better in terms of sunk organic material Williston reservoir in BC and the Manicouagan Reservoir are nearly as big and they didn't clear either of them. The Smallwood Reservoir is 3 times the size of Balbina's.