This is the fish ladder between the Delaware River and the Lehigh River. It is near Easton around the start of the Delaware canal. The dam that is on the Lehigh blocks the path of migration for fish. This forcing of them to spawn elsewhere reduces the survival rate for eggs and newborn fish. In order to help this problem people build fish ladders to help fish follow their regular migration pack.
The ladder in Easton has a clear window to view the fish climbing the ladder. Unfortunately this specific ladder doesn’t have a good reputation of working very well.
It’s interesting to look at the pros and cons of this dam. According to a recent post on this blog, the dam supplies energy for approximately 300 homes, but it also disrupts the natural behavior of wildlife and fish such as shad.