The Mancotal Dam is an

embankment dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface ...

on the Tuma River near

Asturias Asturias (; ; ) officially the Principality of Asturias, is an autonomous communities of Spain, autonomous community in northwest Spain. It is coextensive with the provinces of Spain, province of Asturias and contains some of the territory t ...

Jinotega Department Jinotega () is a department of Nicaragua. Its departmental head is Jinotega. It is located in the north of the country, on the border with Honduras. The Department of Jinotega has a population of 483,404 (2021 estimate) and covers an area of ...

Nicaragua Nicaragua, officially the Republic of Nicaragua, is the geographically largest Sovereign state, country in Central America, comprising . With a population of 7,142,529 as of 2024, it is the third-most populous country in Central America aft ...

. It forms Lake Apanás, the largest reservoir in the country. The primary purpose of the dam is

hydroelectric Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...

power generation and it supports the 50 MW Centro América Plant. The dam was completed and its first generator commissioned in 1964. The second generator was commissioned a year later on 18 March 1965. To generate power, water from the southwestern end of the Lake Apanás flows along a long channel before it enters a series of headrace pipes and a

penstock A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydro turbines and sewerage systems. The term is of Scots origin, and was inherited from the earlier technology of mill pond ...

. About to the south west the penstock meets Centro América Plant where it turns two 25 MW

Francis turbine The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The pro ...

s. After generating power the water is then discharged into the Viejo River. To supplement levels in the Lake Apanás, the El Dorado Dam was completed in 1985 and forms Lake Asturias just downstream of the Mancotal Dam. Water from Lake Asturias can be pumped into Lake Apanás. In 1998 heavy rains from

Hurricane Mitch Hurricane Mitch was an extremely deadly and catastrophic Atlantic hurricane, which became the second-deadliest tropical cyclone in the Atlantic basin on record. Mitch caused 11,374 fatalities in Central America in 1998, including approximately ...

severely damaged the Mancotal and El Dorado Dams, over-topping their

spillway A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure tha ...

s and nearly destroying the dams. The Virgen Dam downstream on the Viejo River was destroyed but later rebuilt.

References

{{GeoGroupTemplate Dams in Nicaragua Hydroelectric power stations in Nicaragua Dams completed in 1964 Energy infrastructure completed in 1965 Jinotega Department

See also

References