In October 1994, HIDISA was granted a thirty-year concession for the generation, sale and commercialization of electricity from the Diamante hydroelectric system (the “Diamante System”). Located on the Diamante river, in the Province of Mendoza, the Diamante System has an installed capacity of 388.4 MW, which represents 1.4% of the installed capacity in Argentina, and is composed of three dams and three hydroelectric power generation plants (Agua del Toro, Los Reyunos and El Tigre). The Diamante System covers a total distance of approximately 55 km with a height differential between 873 m and 1,338 m. From 1990 to 2010, its annual average generation was 611 GWh, with the highest level of generation (943 GWh) reached in 2006 and the lowest level (375 GWh) recorded in 1997.
HIDISA’s revenues are composed of energy and capacity sales. Total revenues for the year ended December 31, 2010 were AR$156 million, corresponding to a net generation of 538 GWh, 10.3% lower than in 2009, with a hydraulic contribution of 1,005 Hm3, 1.4% higher than in 2009. HIDISA made 52% of its sales in the spot market.
The following chart shows certain relevant statistical data on Hidroeléctrica Diamante:
Net Generation (GWh)
Energy Purchases (GWh)
Total Energy Sales (GWh)
Average Price (AR$ / MWh)
Average Gross Profit (AR$ / MWh)
Note: Gross Margin before amortization and depreciation charges.