sentences:  While lower section of the river (after Lac Bienville) has very powerful current, with many waterfalls (up to or in height) and rapids, upper section consists of series of lakes interconnected by steep rapids and ledges.Great Whale River has also the branch originating from Caniapiscau Reservoir.For canoeists, this is the easiest access (bridge on Trans-Taiga Road at Lac Montausier ).