Up an endangered river
By the old mill stream

From the environmental action group American Rivers, America’s Most Endangered Rivers of 2004:

1. Colorado River
2. Big Sunflower River
3. Snake River
4. Tennessee River
5. Allegheny & Monongahela rivers
6. Spokane River
7. Housatonic River
8. Peace River
9. Big Darby Creek
10. Mississippi River