What authority does the Truman-Hobbs Act give the USCG?

The Truman-Hobbs Act grants the U.S. Coast Guard the authority to remove unreasonably constructed bridges that obstruct navigation in navigable waters. This act is significant because it addresses the balance between facilitating maritime transportation and ensuring that infrastructure does not hinder movement on waterways. The Coast Guard takes into account safety, navigability, and environmental concerns when determining if a bridge is unreasonably constructed. This authority is crucial for maintaining safe and efficient navigation, which is vital for commerce and transportation in U.S. waters. Hence, the correct answer reflects the focus of the Truman-Hobbs Act on navigational safety and infrastructure management.