Los Nihuiles Hydro Power Plant (‘HINISA’)

Located on the Atuel river, in the Province of Mendoza, HINISA has a 30-year concession for the generation, sale and marketing of electricity from the Los Nihuiles hydroelectric system since June 1994. HINISA has an installed capacity of 265 MW, which represents 0.6% of Argentina’s 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 2020, its annual average generation was 807 GWh, with a record high of 1,250 GWh in 2006 and a record low of 481 GWh in 2020. Pampa has a 52% direct and indirect stake in HINISA’s capital stock.



The following chart shows certain relevant statistical data on HINISA:

2019 2020
Net Generation (GWh) 499 481
Purchases of Energy (GWh) 1 1
Total Energy Sales (GWh) 500 482
Average Price (US$/MWh) 38 21
Average Gross Profit (US$/MWh) 23 8

Note: Gross Margin before depreciation and amortization, values expressed in nominal terms. AR$/US$ exchange rate: 2019 – 48.23; 2020 – 70.59.


Technical Data

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