The Upamayo Dam (possibly from Quechua ''upa'' calm, silent; mute, ''mayu'' river) is a dam at

Lake Junin Lake Junin (; Spanish ''Lago Junín'', named after the nearby town of Junin) or Chinchaycocha (possibly from Quechua ''chincha, chinchay'' north, northern, ''chinchay'' ocelot, ''qucha'' lake, lagoon, "northern lake" or "ocelot lake") is the larg ...

, the largest lake entirely in

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

. It is located on the border of the

Junín Region Junín may refer to: Places Argentina *Junín Partido **Junín, Buenos Aires *** Junín Airport * Junín Department, Mendoza ** Junín, Mendoza * Junín Department, San Luis *Junín de los Andes, Neuquén Colombia *Junín, Cundinamarca *Juní ...

Junín Province Junín Province is a province in northwestern Junín Region, in the central highlands of Peru. Its capital is the city of Junín. Geography The territory of the province is mountainous and it includes Lake Junin which is the largest lake entire ...

, Ondores District, and the Pasco Region,

Pasco Province The Pasco Province is one of the three provinces that make up the Pasco Region in Peru. The capital of this province is the city Cerro de Pasco. Boundaries *North: Huánuco Region *East: Oxapampa Province *South: Junín Region *West: Lima Regio ...

, Vicco District. The dam was erected in 1936. It is high and long. It is operated by Centromín Perú. The

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

has a capacity of .

References

{{reflist, refs= {{Ref Laime escale.minedu.gob.pe - UGEL map of the Junín Province (Junín Region) Obras hidraulicos en la cuenca de Mantaro - fuente : fuente: Electroperu - Inventario proyectos de afianzamiento hidrico Cuenca del Rio Mantaro, 2005 Recursos Hídricos del Perú en Cifras, Boletín Técnico de Recursos Hídricos 2010, Autoridad Nacional del Agua, Ministerio de Agricultura, Perú Dams in Peru Buildings and structures in Junín Region Buildings and structures in Pasco Region Dams completed in 1936 Gravity dams