Download this year’s report: Most Endangered Rivers of 2015 (PDF)

1.Colorado River in the Grand Canyon
A proposed industrial-scale construction project threaten the Grand Canyon’s wild nature and unique experience that belongs to every American.
2. Columbia River
Outdated dam operations are putting healthy runs of salmon and other fisheries at risk.
3. Holston River
Toxic chemicals from the Holston Army Ammunition Plant are putting local water supplies and the community’s health at risk.
4. Smith River
A proposed copper mine could harm a nationally-renowned wild trout fishery.
5. Edisto River
Excessive agricultural water withdrawals are putting water supply, water quality, fish and wildlife habitat, and recreation at risk.
6. Chuitna River
A proposed mine threatens to destroy 30 square miles of irreplaceable wild river habitat.
7. Rogue-Smith Rivers

Strip mining, road construction, and metal processing would devastate this fragile, precious wild area.
8. St Louis River

Mining could destroy or degrade thousands of square miles of pristine forested wetlands and streams.
9. Harpeth River

Sewage pollution and water withdrawals are putting clean water, fish and wildlife, and recreation at risk.
10. Pearl River

A new dam threatens to ruin healthy wetlands and wildlife habitat