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This postcard invites visitors to the St. Lawrence Power Dam in Massena, New York and Cornwall, Ontario, highlighting the joint effort between the Power Authority of the State of New York and The Hydro-Electric Power Commission of Ontario, Canada. The project harnesses the power of the St. Lawrence River and offers free visitor facilities. The postcard also mentions the Niagara Power Project and encourages visitors to enjoy the power projects at Niagara Falls and Massena. The postcard, sent to Clara Blount, showcases the social and cultural value of hydroelectric power projects and the collaboration between different entities to provide clean energy. It also reflects the interest in promoting tourism and education about renewable energy sources.