The Power Plant harnesses water from the Calderas and Tafetanes Rivers with an average flow of 6.7 m3/s, and it has an installed capacity of 26 MW. The water that flows through the power plant's turbine is ultimately discharged into the San Carlos River that feeds the Punchiná Reservoir, and this increases production at the San Carlos Power Plant by 269 GWh/year.
It is located in the department of Antioquia, near the highway that connects Medellín to the municipalities of Granada and San Carlos. The community closest to the power plant is the municipality of San Carlos. The powerhouse is located in the basin of the La Arenosa stream, a tributary of the San Carlos River, while the reservoir is located on the high basin of the Calderas River.
The 115 kV Calderas substation is connected to the National Electrical Grid through the Guatapé - Rio Claro line.
It was built between 1982 and 1986. The Tafetanes River’s diversion was completed in 1987 and the power plant began operation in 1988. It went out of service years later as a result of natural causes, as well as law & order issues. In 2005, we began work on restoring it.
In 2006, it once again began commercial operation as a minor 19.9 MW plant, thereby reinforcing Eastern Antioquia’s hydropower system by 356 GWh/year.
The dam built over the Calderas River is a 25 m-high concrete gravity dam, forming a reservoir that has a storage capacity of 330,000 m3. To handle overflow, there is a free flow channel spillway designed to evacuate an estimated probable maximum swell of 1,100 m3/s.
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.
- See PDF | Technical Specifications
- See PDF | Environmental Management Plan