Detail design of the El Pinar hydroelectric plant in Chile, Yungay municipality on the Cholguan River.

The El Pinar plant works with 7 m³/s of flow and it is mainly composed by a weir, a 1.7 km adduction tunnel followed by a 5.6 km and 2000 mm diameter HDPE adduction pipe. The penstock is made of a 400 m steel pipe, with a 1400 mm diameter, partially buried and partially exposed.

The powerhouse has two turbines: a Pelton and a Francis with a total power output of 11 MW. A discharge channel provides the restitution of waters to the river.