Upon researching Canada's involvement in the Passamaquoddy Tidal Project one would find a lack of information. This is due to a restriction on access to archival information based on the suspicions of theft of research. In 1989 this legislation was overturned to the point were an individual could request the government for information through a lengthy application process. However, the Canadian government reserves the right to deny anyone access based on liberal criteria.
Through public access the earliest available piece of official interaction dates back to 1948, over eleven years after the original project was discontinued. However, throughout the document previous interactions are referenced. This document is proceeded with the statement that the United States Embassy suggests that the Passamaquoddy Tidal Power Project be titled under the International Joint Commission under Article IX of the Boundary Waters Treaty of 1909, which is the guiding legislation on disputes between the United States and Canada regarding joint waterways. The first noted date between the two countries is 1927 when Canada becomes interested in the effect the project will have upon the herring industry, which had a gross income of $1,500,000-yearly (Alewives). Once the project began in 1935 there was little to no interaction between the two governments even though the project would have altered Canadian waterways. This is most likely due to the fact that the project was never constructed to the point in which Canadian involvement was necessary. However, a restricted note was sent from the United States Embassy to the Canadian government regarding some component of the project.
A subsequent request was for construction of the Passamaquoddy Tidal Project was extended to Canada in 1956. This was issued after a joint study of the bay. The study, presented a 3 billion Kilowatt-hour capacity, however in 1959 a similar report only showed a 1.8 billion Kilowatt hour production. The renamed Kennedy Quoddy Dam, in its final configuration, was to have produced 1000 Megawatt-hours, though still four times larger than the France's La Rance Tidal Dam. With projects of 300% less than the 1956 study, the Canadian government refused to agree because of the high cost and seemingly low gains of the project. However, they expressed interested in further documentation and results from studies. Further plans were generated by the United States in subsequent years, and at one point the U.S offered to pump free electricity to Canada. This offer was declined because Canada was in the process of revitalizing the Hydro-Quebec plant, which would have failed with the introduction of free energy.
Though the United States continues to search for energy in Passamaquoddy Bay, Canada has done little to invest in their own projects. In 1980 an experimental project was initiated in the Bay, however the project was canceled only after a year of testing. The existing Annapolis Royale Tidal Dam became the focus of tidal power within Canada starting in 1982. (Canada's Generation)