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, representing 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 approximately 40 km with a differential between 754 m and 1,251 m above sea level. From 1990 to 2023, its annual average generation was 778 GWh, with a record high of 1,250 GWh in 2006 and a record low of 428 GWh in 2022. Pampa has a 52% direct stake in HINISA’s capital stock.



The following chart shows certain relevant statistical data on HINISA:

2022 2023
Net Generation (GWh) 428 543
Purchases of Energy (GWh)
Total Energy Sales (GWh) 428 543
Average Price (US$/MWh) 23 17
Average Gross Profit (US$/MWh) 3 1

Note: Gross Margin before depreciation and amortization.


Technical Data

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