This documentary showcases all of the downfalls of dams and the damage the do to fish ecosystems. There’s over 75,000 dams in the US that are taller than 3 feet. That would equate to a new one being built every day since Thomas Jefferson was president. These dams have lead to the death of thousands of salmon. The topic of closing down dams has become very political. On one hand many people will lose jobs but keeping them is destroying natural habits. This issue is not going away any time soon.