Panama Canal from Barro Colorado Island, by Wetmore, Alexander 1886-, June 30, 1953, Smithsonian Archives - History Div, Looking down from the Main Laboratory on the mountain top of Barro Colorado Island (BCI) Biological Area, now known as the Smithsonian Tropical Research Institute, to a ship travelling through Gatun Lake, created when the Chagras River was dammed to create a watershed for the Panama Canal. Slothia Island can be seen in front of BCI; the town of Frijoles is visible in the distance. Tree tops can be seen in the water when the Chagres River was dammed and flooded the area..