Each year American Rivers reveals finalists for its "Most Endangered" list based on three criteria: A major decision in the coming year that the public can help influence; the significance of the river to people and wildlife; and the magnitude of the threat, especially in light of a changing climate.
These photos represent 10 rivers chosen for 2011 as well as a "special mention" for the Mississippi River due to recent flooding.
(Via: MSNBC)