Description
The lake is situated in the valley of the Chagres River. It was formed, and the river widened and deepened, by the construction of the Gatun Dam about 10 km (6.2 mi) from the river's mouth in the Caribbean Sea in 1907–1913. The geography of the area was ideal for the creation of a large lake here; the hills bordering the valley of the Chagres open up widely around the area of the lake, but come together to form a gap just over 2 km (1.2 mi) wide at the location of the dam. The damming of the river flooded the originally wooded valley; almost a century later, the stumps of old mahogany trees can still be seen rising from the water, and submerged snags form a hazard for any small vessels that wander off the marked channels.
Gatun Lake has an area of 425 km2 (164 sq mi) at its normal level of 26 m (85 ft) above sea level; it stores 5.2 cubic kilometres (183,000,000,000 ft³) of water, which is about as much as the Chagres River brings down in an average year.
With the creation of the lake many hilltops became islands. The biggest and best known of them is Barro Colorado Island, home of the world famous Smithsonian Tropical Research Institute (STRI).
The lake has given its name to the Gatun structure, which may be an eroded impact crater.
Read more about this topic: Gatun Lake
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