Hydroelectric Generation System
The preceding diagram shows the main facilities of the two phases of
the Taquesi River Hydroelectric Complex. The first phase of the project
comprises an intake – downstream from the confluence of the Kholani
and Taquesi rivers-, a canal leading the water into a forebay at Pongo
Pampa, penstocks connected to the forebay and two generating units with
a total capacity of 850 kW. The same water transportation system also
feeds four additional generating units that supply electric energy to
IMCO, a mining company that operates in the area.
The Chojlla Plant complex is composed by the Kacapi diversion weir, with
an impounding capacity of around 110,000 m3, a 3.7 km. tunnel, a penstock
with a 580 mt. head, which is the highest in the world for Francis turbines.
The powerhouse at Chojlla has a single unit with a generation capacity
that exceeds of 37 MW. The Yanacachi Plant has a weir and a daily regulation
reservoir with a capacity of 45,000 m3. This reservoir connects with an
approximately 3.8 km long tunnel, through a covered canal, approximately
400 m. long and discharges into a penstock with a 520 m. headl. The turbine-generator
unit has a capacity of more than 51 MW.
Beginning of Commercial Operations
Commercial operations of the second phase of the Taquesi River Hydroelectric Project began on June 19, 2002. Until then the two small reconditioned plants corresponding to the first phase of the project, had been operating, since 1998.
As of June 19, 2002, the new Chojlla and Yanacachi Norte Plants started to delivering their power to the National Interconnected System. Besides being a very important accomplishment for Hidroeléctrica Boliviana, this date also constitutes a milestone in the history of power generation in Bolivia. As a matter of fact, with the Taquesi project, Bolivia has, for the first time, a totally private actor funded by the Bolivian Stock Exchange, and the first to use internal savings to finance infrastructure works. On the other hand, the Taquesi project shows that the bet on renewable energy is possible at a time when hydrocarbons resources seem to dominate the national energetic balance. Finally, the investment made in the second phase of the Taquesi Project constitutes the largest financial effort made by a single project in the history of power generation in Bolivia.