Ituango dam
| Ituango Hidroituango |
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| Coordinates | 7 ° 8 '4 " N , 75 ° 39' 43" W | ||||||||
| Data on the structure | |||||||||
| Lock type: | Earthfill dam | ||||||||
| Construction time: | 2011-2018 (under construction) | ||||||||
| Height of the barrier structure : | 225 m | ||||||||
| Building volume: | 19 million m³ | ||||||||
| Power plant output: | 2 400 MW | ||||||||
| Operator: | EPM Ituango | ||||||||
| Data on the reservoir | |||||||||
| Water surface | 38 km² | ||||||||
| Reservoir length | 127 km | ||||||||
| Storage space | 2720 million m³ | ||||||||
| Design flood : | 22nd 600 m³ / s | ||||||||
The Ituango dam on Spanish landesüblich Hidroituango called, is a property under construction dam project on the middle reaches of the Río Cauca in Ituango in Antioquia Department in Colombia .
The main purpose of the project is hydropower generation , the hydropower plant will have an installed capacity of 2400 MW . Preparatory work on the dam began in September 2011 and the power plant is scheduled to go into operation in 2018. When completed, it will be the largest power plant in Colombia.
background
A feasibility study was carried out in 1983, but the project was postponed in the 1990s due to an economic crisis. The final designs for the project were completed in 2008 and the contract was awarded on July 8, 2011. Preparatory work (surveying, roads, bridges, diversion tunnels) began in September 2011 and ended in 2013. The main work began after that. The project development is carried out by EPM Ituango, a consortium of Empresas Publicas de Medellín (EPM) and the government of Antioquia. The total cost is estimated at $ 2.8 billion.
Building
A 225 m high earth embankment with a clay core will be built as a barrier structure. The cubic volume of the dam will include 19 million cubic meters. The reservoir will have a storage space of 2,720 million m³, of which 980 million m³ will be available for generating electricity. It will be 127 km long and cover an area of 38 km². To control the water level, the dam will have a flood relief with four radial seals with a discharge rate of 22,600 m³ / s. The hydropower plant will be built as a cavern power plant, will work with a drop height of 197 m and will have eight 307 MW Francis turbines and generators with vertical shafts. It is planned to produce an average of 9200 GWh of electricity annually.
Misfortune 2018
At the end of April 2018, heavy rains and landslides caused a bypass tunnel, which was actually supposed to lead the water of the Río Cauca past the construction site, partially collapsed and was blocked, which led to an uncontrolled rise in the sea level. At this point in time, the dam had not yet been completed to its final height, which meant that the existing, regular operational overflow at the level of the future dam crown could not be used to drain the water. Other bypass tunnels from the earlier construction phase were already closed with a concrete plug. After an emergency opening of these concrete seals by blasting was unsuccessful, from May 10, 2018, part of the water was diverted via the turbine inlet through the power plant cavern under construction. Since overflowing the not yet finished dam would have led to its collapse and thus to a flood disaster, evacuations were ordered. In the event of a total failure of the barrier structure, 100,000 people would have been affected. A state of emergency has been declared by the governor of the province of Antioquia, Luis Pérez. The decision to divert the flood through the only partially completed machine hall resulted in drastic damage to the machinery already installed there; Likewise, the date planned for December 2018 to start electricity production could not have been met.
On May 20, 2018, intensive work around the clock on the construction site of the dam crest enabled the height of 407 m to be reached. From the level of 410 m, which was reached on May 24, 2018, it was possible to regularly drain the accumulated water via the completed flood overflow, which resulted in a certain relaxation for the situation at the barrier installation. There is still a danger for the underlayers in the form that the partially collapsed bypass tunnel breaks its natural blockade and a tidal wave pours into the lower reaches.
See also
- List of the largest dams on earth
- List of the largest reservoirs on earth
- List of the largest hydroelectric plants in the world
- List of power plants in Colombia
- List of dams in the world (Colombia)
swell
- ↑ Hidroituango - La central hidroeléctrica en construcción eltiempo.com, accessed on February 11, 2019 (Spanish)
- ↑ Chadbourne Represented EPM Ituango in BOOMT Contract for the 2400 MW Hidroituango Project ( Memento of the original from July 29, 2012 in the web archive archive.today ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , April 28, 2011, accessed July 9, 2011
- ↑ China, South Korea companies in race for Colombia hydropower deal , Colombia Reports, February 3, 2010, accessed July 9, 2011
- ^ Colombia hydro utility to build 2688-MW Pescadero Ituango , HydroWorld, December 7, 2011, accessed July 9, 2011
- ↑ Construction preparation begins for 2400-MW Ituango in Colombia , Hydro World, September 22, 2011, accessed March 29, 2012
- ↑ Evolution of Expansion Plans , EPM, accessed July 9, 2011 (PDF file)
- ↑ Consortium wins US66 million contract for Ituango hydro project build in Colombia , HydroWorld, July 8, 2011, accessed September 13, 2012
- ↑ Datos Técnicos hidroeléctrica.com.co, accessed April 16, 2018 (Spanish)
- ↑ Hidroituango dam threatens to break , message on blickpunkt-latein America.de from May 18, 2018
- ↑ Colombia braces for Ituango 'catastrophe' , message on bnamericas.com from May 17, 2018
- ↑ Information on the website of the system operator, Spanish language, accessed on May 26, 2018
Web links
- Hidroeléctrica Ituango Official Website (Spanish)