Gatun Lake

Gatun Lake
Ships follow marked channels
among the hilltop islands.
Gatun Lake
Coordinates9°12′N 79°54′W / 9.2°N 79.9°W / 9.2; -79.9
TypeArtificial lake
Primary inflowsChagres River
Catchment area2,313 square kilometres (2.490×1010 sq ft)
Basin countriesPanama
First floodedJune 27, 1913
Surface area431 km2 (166 sq mi)
Average depth12.7 metres (42 ft)
Water volume5.48 km3 (4,440,000 acre⋅ft)
Residence time1 yr
Shore length11,750 kilometres (1,090 mi)
Surface elevation26 m (85 ft)
IslandsIsla Barro Colorado, Isla Gatun, Isla Falta Calzado, Isla Tres Perros
1 Shore length is not a well-defined measure.

Gatun Lake (Spanish: Lago Gatún) is a mostly freshwater (slightly saline near the locks) reservoir to the south of Colón, Panama. At approximately 26 m (85 ft) above sea level, it forms a major part of the Panama Canal, carrying ships 33 km (21 mi) of their transit across the Isthmus of Panama. It was created June 27, 1913 when the gates of the spillway at Gatun Dam were closed. The water level was about 14.6 m (48 ft) above sea level and was expected to fill to operating levels in the next six months.