Humans have constructed dams for a variety of reasons: water storage, flood prevention, electricity generation, irrigation, navigation, and recreation (Francisco 2004). Dams have long been thought of as a “green” source of energy because of the way they produce power from water without the use of fossil fuels. However, there is a huge downside to dams that many people fail to consider, and that is the negative impacts these dams can have on local ecosystems. In this case study, we are focusing on the impacts dams have on local fish populations, mainly migratory fish within St.