By Azadeh Ansari
CNN
(CNN) -- Rivers are the arteries of our infrastructure. Flowing from highlands to the sea, they breathe life into ecosystems and communities.
But many rivers in the United States are in trouble.
Rivers in Alaska, California and the South are among the 10 most endangered, according to a report released Tuesday by American Rivers, a leading river conservation group.
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Here is American Rivers' Most Endangered Rivers list for 2009:
1) Sacramento-San Joaquin River System
Location: California
Outdated water and flood management puts California's largest watershed at the top of America's most endangered rivers list for 2009. A recent breach in the delta's 1,100-mile levee system could have dire effects on surrounding ecosystems, farming and agriculture, commercial fishing and California's civil infrastructure. State and federal authorities are looking at alternative water-management strategies for the river system, which serves 25 million Californians and more than 5 million acres of farmland.
2) Flint River
Location: Georgia
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more:
http://www.cnn.com/2009/TECH/science/04/07/rivers.endangered.list/index.html