
Every year since 1986, American Rivers has teamed up with river conservationists to release an annual report of America’s Most Endangered Rivers.
This report highlights a number of threats to our rivers and examines risks to communities and wildlife.
Three of these Endangered Rivers are tributaries to two NWNL case-study watersheds: The Columbia River Basin (The Kootenai/Kootenay River) and the Mississippi River Basin (Little Plover River via the Wisconsin River tributary) and the Niobrara River (via the White and Missouri River tributaries).
Let’s keep our rivers healthy! Learn more about how you can help. Read the full 2013 Report.
1. Colorado River
Location: Arizona, California, Colorado, Nevada, New Mexico, Utah, Wyoming
Threat: Outdated water management
At Risk: Recreation economy, water supply, and wildlife habitat
2. Flint River
Location: Georgia
Threat: Outdated water management
At Risk: Water supply for communities, farms, recreation, and wildlife
3. San Saba River
Location: Texas
Threat: Oudated water management
At Risk: River flow for ranchers, citizens, and lakes
4. Little Plover River
Location: Wisconsin
Threat: Outdated water management
At risk: Fish habitat and water supply
5. Catawba River
Location: North Carolina, South Carolina
Threat: Coal ash pollution
At risk: Drinking water and recreational enjoyment
6. Boundary Waters
Location: Minnesota
Threat: Copper and nickel mining
At risk: Recreation economy, drinking water, and wilderness
7. Black Warrior River
Location: Alabama
Threat: Coal mining
At risk: Drinking water quality and fish and wildlife habitat
8. Rough & Ready and Baldface Creeks
Location: Oregon
Threat: Nickel mining
At risk: Pristine rivers, wilderness, botanical diversity, and recreation
9. Kootenai River
Location: British Columbia, Montana, Idaho
Threat: Open-pit coal mining
At risk: Water quality and survival of rare fish and wildlife
10. Niobrara River
Location: Nebraska, South Dakota, Wyoming
Threat: Sediment build-up and flooding
At risk: Property, crops, and public safety
Special Mention: Merced River
Location: California
Threat: Intentional flooding of a Wild and Scenic River
At risk: Wildlife habitat and recreation economy