Los Nihuiles Hydro Power Plant (‘HINISA’)

In June 1994, HINISA was granted a 30-year concession for the generation, sale, and marketing of electricity from the Los Nihuiles hydroelectric system. Located on the Atuel river, in the Province of Mendoza, HIDISA has an installed capacity of 265 MW, which represents 0.7% of Argentina’s installed capacity, and consists of three dams and three hydroelectric power generation plants (Nihuil I, Nihuil II and Nihuil III), as well as a compensator dam. Los Nihuiles System extends for a total distance of approximately 40 km with a height differential between 440 m and 480 m. From 1990 to 2019, its annual average generation was 818 GWh, with a record high of 1,250 GWh in 2006 and a record low of 498 GWh in 2019. Pampa has a 52% direct and indirect stake in HINISA’s capital stock.



The following chart shows certain relevant statistical data on HINISA:

2018 2019
Net Generation (GWh) 577 498
Purchases of Energy (GWh)
Total Energy Sales (GWh) 577 498
Average Price (US$/MWh) 31 38
Average Gross Profit (US$/MWh) 20 23

Note: Gross Margin before depreciation and amortization, values expressed in nominal terms. AR$/US$ exchange rate: 2018 – 28.13; 2019 – 48.23.


Technical Data

Plant Unit Installed Capacity (MW) Start-Up Type of Unit
HINISA NIH1HI 74 265 1994 Hydroelectric
NIH2HI 139