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 | ||||
| NIH2HI | 52 | ||||