The Lakes, Parks and Leisure Administration in Bucharest (Romanian: Administrația Lacuri, Parcuri și Agrement) has under its upkeep nine lakes and nine dams, from the total of 15 located on the Colentina River, that started to be built since 1936 and that cover a total area of 1,153.98 ha (2,851.5 acres) and have a combined volume of 29,571,000 m3 (1.0443×109 cu ft).[1] The largest lake inside Bucharest, in terms of surface area, is the Lake Morii,[2] other large lakes with banks in Bucharest or parts in Bucharest are the Lake Cernica that has an area of 341 ha (840 acres); and the largest in terms of volume is Lake Pantelimon with a volume of 12,300,000 m3 (430,000,000 cu ft).[1] The oldest manmade lake in Bucharest is the Herăstrău Lake, which was completed in 1936; this lake also has the oldest sluice in the city, built between 1933 and 1936, and finalized in 2007.[3][4]