Diamante Hydro Power Plant (‘HIDISA’)

Located on the Diamante river, in the Province of Mendoza, HIDISA holds a 30-year concession, effective since October 1994, for generating, selling, and marketing electricity from the Diamante hydroelectric system. With 388 MW, representing 0.9% of Argentina’s installed capacity, it consists of three dams and three hydroelectric power generation plants (Agua del Toro, Los Reyunos, and El Tigre). The Diamante System extends for approximately 55 km with a height between 873 m and 1,338 m above sea level. From 1990 to 2021, its annual average generation was 538 GWh, with a generation record high of 943 GWh in 2006 and a record low of 322 GWh in 2014. Pampa holds a 61% direct stake in HIDISA’s capital stock.



The following chart shows certain relevant statistical data on HIDISA:

2020 2021
Net Generation (GWh) 323 325
Purchases of Energy (GWh)
Total Energy Sales (GWh) 323 325
Average Price (US$/MWh) 37 34
Average Gross Profit (US$/MWh) 20 12

Note: Gross Margin before depreciation and amortization, values expressed in nominal terms. AR$/US$ exchange rate: 2020 – 70.59; 2021 – 95.16.


Technical Data

Plant Unit Installed Capacity (MW) Start-Up Type of Unit
HIDISA ADTOHI 150 388 1994 Hydroelectric