Elver pass
Draft:Eel and Elver pass; Draft:Eel and elver passe
An elver pass or eel pass is a waterway modification constructed to mitigate the effects of obstructions, especially manmade weirs, on waterways, watercourses, ditches, drains, channels and flumes, on the movement of eels, fish and elvers (juvenile eels). Powerful swimmers, including salmon and sea trout, find it easy to pass through many structures.