Fish passage is the ability of fish or other aquatic species to move through an aquatic system among all habitats necessary to complete their life cycle. The National Fish Passage Program opens up aquatic travel routes that have been blocked or fragmented. When rivers are fragmented by dams, culverts, or other diversions, they can become congested. These aquatic barriers have the same effect as roadblocks on a busy highway. Traffic backs up, people get stranded, and emergency services stal...
