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The soft-bottom channel condition is characterized by segments of the channel with concrete walls and gravelly and often inundated soils at the base. This existing condition is found along areas of the river such as the Narrows. However, areas of the river with this condition currently do not meet flood management design capacity.
The soils in this condition allow for more riparian plant communities and greater vertical structure that provides habitat for species such as the belted kingfisher, western toad, and the Santa Ana sucker.