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Continuing construction of the top level of the Madden Dam taken at night. The Panama Canal was opened on August 15, 1914. The first major capital improvement was the Madden Dam and Power Project. Completed in 1935, it controlled the flow of water from the Chagres River into Gatun Lake and created its own reservoir, Lake Madden. [That name was changed to Alajuela Lake in 1999 when the Canal Zone was returned to Panama.] Hydroelectric power and...