Endangered Species Program
Conserving the Nature of America

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Getting Across: Aquatic Organisms and Road-Stream Crossings
Partner: U.S. Forest Service and Federal Highway Administration


Many culverts act as dams, or have water depths and flow velocities that otherwise block the passage of fish and other aquatic organisms. Not only does the health and diversity of the watershed depend on free passage upstream and downstream, but the Endangered Species Act and Clean Water Act both mandate free passage for aquatic species. This video explains why and how fixing culverts at road-stream crossings will restore habitats.

Last updated: April 7, 2011