Quebrada de Ullum

The reservoir is formed on river San Juan. It is located in the west of the province of San Juan, at 16 km from the capital city.
It has an installed capacity of 45 MW and was acquired by AES in March 1996.

Technical Data

Type: Soft materials dam, with impervious vertical core
Spillway type: Lateral with no regulation – free.
Spillway capacity: 2,560 m³/sec.
Maximum height: 67 m
Crest length: 350 m
Reservoir volume: 330 hm³.