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The Power Plant is located in the municipality of Norcasia. It forms part of the hydropower potential found in eastern Caldas, a region comprising the basins of the Guarinó, La Miel, Moro, Manso and Samaná Sur Rivers and minor tributaries such as the Pensilvania and Tenerife Rivers. The Power Plant has an installed capacity of 396 MW across three generation units. It began commercial operation in December 2002.

The plant's Guarinó Diversion Structure has been in operation since 2010, increasing its generation capacity by 308 GWh/year. The Manso Diversion Structure began operation in 2013, which increased the power plant's capacity by 104 GWh/year.

For connection to the National Transmission System, energy is evacuated to the Miel I 230 kV substation.

The Patángoras Dam is built over the Miel River. It is a 188 m-high gravity dam made of roller-compacted concrete (the second highest in the world) and it is 340 m long at the crest, forming the 1,220-hectare Amaní reservoir, which has a storage capacity of 571 million m3.

  •  See PDF | Technical Specifications
  •  See PDF | Environmental Management Plan

Guarinó Diversion Structure

It is located in the department of Caldas along the border with the Tolima department, on the eastern slope of the Central Andean Mountain Range, in the lower-middle basin of the Guarinó River. The project is situated nearby the municipality of Victoria.

The Guarinó Diversion Structure began commercial operation in 2010. These works consist of a 7 m-tall (approx.) concrete dam on the Guarinó River, intakes, a headrace, filter channel, environmental flow structures and a 3,378 m-long diversion tunnel.

The Diversion Structure’s intake and tunnel are located in the area between the Guarinó and Miel Rivers, within the jurisdiction of a village called Cañaveral. This village is located approximately 29 kilometers upstream from the point where the Guarinó River empties into the Magdalena River. The Diversion Structure’s tunnel outlet is near the Miel riverbed.

  •  See PDF | Environmental Management Plan
  •  See PDF | Fauna monitoring and follow-up

Manso Diversion Structure

It is located in the department of Caldas, bordering the municipalities of Samaná and Norcasia, on the eastern slopes of the Central Andean Mountain Range. It diverts some of the water from the Manso River, to the Amaní reservoir that serves the Miel I Hydroelectric Power Plant, via a tunnel.

The Manso Diversion Structure consists of a small concrete dam on the Manso River and a 4,015 m-long tunnel to direct water from the Manso River to the Santa Bárbara Stream and ultimately, to the Miel I Power Plant's Amaní Reservoir.

The Diversion Structure includes a road for accessing the tunnel's outlet. This road has two bridges, one over the Montebello stream, and another over the Soto stream.

  •  See PDF | Manso Diversion Booklet

Our environmental management

The environment in which we build our generation projects and operate our power plants comprises three dimensions: biotic (fauna and flora), physical (water, air and soil) and social. Whenever we carry out activities, we consider the relationship between these three dimensions, and commit ourselves to comprehensive environmental management that includes the identification, assessment, prevention, correction, mitigation and offsetting of negative environmental and social impacts, while also seeking to reinforce any positive impacts, thereby complying with current and applicable environmental regulations.

We prepare the relevant environmental impact assessments and environmental management plans, and we always adhere to the precautionary principle, i.e. if there is any doubt regarding the effect that an action or activity on our part could cause, we do not move forward with it. We carry out this exercise in all our power plants and generation projects' areas of influence, and we implement development programs, understanding each region's characteristics and facilitating participation by the communities.

Find out more about our environmental management, the initiatives we carry out with communities from our power plants' areas of influence, and the Encomunidad media through which we promote transparent and friendly communication and information.

 

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Our power plants

Our power plants

Hydropower is our main generation source, and we have two types of plant: those with reservoirs or stored water, and run-of-the-river plants that harness the flow of a river.