Hundreds of miles of US rivers are now legally critical habitat for mussels

The US Fish and Wildlife Service has designated over 3,800 miles of rivers across 17 states as critical habitat for four species of endangered freshwater mussels. This means that any federal project or federally funded activity in these areas will now face stricter environmental reviews to protect these specific mussel habitats.

This rule makes it harder to build or modify infrastructure in thousands of miles of US rivers. Any project that needs a federal permit or federal money, like dams, bridges, or dredging, will now have to prove it will not harm these mussel populations. This shifts the cost of environmental protection onto developers and agencies working in these waterways.