The IDB Invest loan (hereinafter the “Operation”) will partially finance the construction of the San Bartolomé and Oibita hydroelectric plants (the “Projects”) located in the municipalities of Oiba and Guapotá (approximately 150 km from Bucaramanga) in the Department of Santander. The projects’ cost approximately US$128 million and will take an estimated 52 months to construct (including early works), beginning in September 2017.Once completed, together they will generate 280 GWh of clean energy per year, which will be delivered to the National Interconnected System (SIN) through a 13.2 km transmission line that will also be financed through the Operation.
The San Bartolomé plant (CSB) will have an effective installed capacity of 19.9 MW, for a design flow rate of 13 m3/s and a net fall of 179 m. The pipeline work (conduction tunnel and pressure pipe) is approximately 3 km long. To divert water from the river to the project, a weir will be constructed in the channel next to which a water collection structure will be built, making it unnecessary to dam the water or flood the land surface. In general terms, the CSB consists of a weir, a lateral catchment area, a desander for sediment retention, a box culvert, a conduction tunnel, a loading pipe, a surface machine house and, finally, a discharge channel to deliver the turbined water to the Oibita River.
The Oibita plant (CHO) plant consists of a loading tank, an adduction channel, an upper conduction tunnel, a loading well, a lower conduction tunnel, a beacon window tunnel, a valves house, a loading pipe, a surface machine house and, finally, a discharge channel to deliver the turbined water to the Suárez river. The Oibita project will receive the turbined water from the San Bartolomé project.
Both projects, as well as the transmission line, have their respective environmental authorizations issued by the Regional Autonomous Corporation of Santander (CAS).