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Rivers across the nation are on an environmental group's annual list of the 10 most endangered U.S. waterways.
/ Updated 10 PHOTOS
CEDAR RAPIDS, IA - JUNE 13: An aerial image shows flood-affected areas June 13, 2008 in Cedar Rapids, Iowa. Flooding along the Cedar River was expected to crest today. (Photo by David Greedy/Getty Images)— David Greedy / Getty Images North America
PITTSBURGH - AUGUST 17: The view from the Hot Metal bridge of downtown Pittsburgh, where the Monongahela River meets the Allegheny river to form the Ohio. (Photo by Ann Hermes/The Christian Science Monitor/Getty Images)— Christian Science Monitor / Christian Science Monitor
Photographer: Jonathan Long www.jonlong.com— Jonathan Long / www.JonathanLong.com
National Wild and Scenic Chetco River in the Kalmiopsis Wilderness and one of the areas proposed for mining.— Usda Forest Service