Passamaquoddy Bay is located in the eastern most point in the United States and serves as a partial boarder with Canada. Part of the Bay of Fundy, the area is well known for its extreme tidal shifts. In some locations the tide can rise and fall be thirty feet. This natural phenomenon has been seen not only as a marvel of nature but also as an economic gain through tidal dams. Many propositions have been made over the years to harness the energy produced by the changing tides however opposition has been strong against the projects. The Passamaquoddy Tidal Project among others in Maine is the future for power within the state. Above is a depiction of what the tidal dam would comprise of expanding across Passamaquoddy Bay. Tactics employed in modern day tidal power are less invasive resulting in the many companies revitalizing interest within the bay. Across the state of Maine hydropower is in various states of creation, removal, or proposal. With an ever-growing need for electricity fought by environmental law and activist it is uncertain where a balance will be found.


  • In 1926, Dexter P. Cooper arrived in Passamaquoddy Bay to survey the land and ocean for a potential tidal dam. Over the coming years the project grew involving the Army Corp of Engineers, thousands of workers, and even the guiding hands of presidents. Click here to view the history of the Passamaquoddy Tidal Project.  

Current Issues

  • Alewives are an intricate part of the St. Croix River. These anadromous fish use the river to reach their breeding grounds higher up in the watershed. However, dams and legislation have caused a dramatic loss in alewife populations in the entire watershed. Current legislation is attempting to reverse the degradation of the species though they are meeting heavy resistance from Passamaquoddy guides. Click here to view the history and current issues regarding alewife populations on the St. Croix River in Maine.
  • Acting as the boarder between the United States and Canada, in Maine, the St. Croix River has been a both a destination of recreation and species restoration. Canada has taken many initiatives to restore the St. Croix to its original grandeur. Click here to view Canada's involvement on the St. Croix River. 

Generation and transmission

  • The generation of energy of all forms has become a key industry within Maine and Canada. Different types of collecting methods have grown and waned in popularity over the past decades, leading to various types of energy generations all over the Northeast. Click here to view generation practices in Maine and Canada.
  • The transmission of energy has a similarly lucrative niche as generation of energy in both Maine and Canada. These internal and external relationships are sure to persist in the future however, in what manner it is uncertain. Click here to view the transmission characteristics of Maine and Canada.

Future of Water Power

  • As populations grow across the country new sources of energy need to be constructed to match consumption. Maine is debated as one of the leaders in hydropower within the country. However, recent removals of dams seemed to have halted any further planes. Maine's role in hydroenergy is uncertain in the future. Click here to view how Maine will adapt and how it is adapting to changes in        hydropower.  
  • Over the course of the past eighty years the need for energy has increased dramatically. Tidal projects within the Passamaquoddy Bay are still being heavily pursued by multiple companies including the Passamaquoddy Indian Reserve. In the future it is uncertain whether the Bay will remained untouched by tidal dams or turbines. Click here to view potential tidal project in Passamaquoddy bay.
  • Technological limitations to tidal power have been one of the largest obstacles for the feasibility of many projects. The need for collecting apparatuses to be low maintenance, resistant to high salinity levels, and to be able to filter obstacles from the turbine has made many technologies and projects fail.  Click here to view the limitations of tidal power.
  • FERC preliminary permits are ways in which companies are allowed to collect information and data on potential energy generation sites. Click here to view the preliminary permits in relation to tidal power.

Maps and Figures
Other Dam Projects


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