[3] Preparatory works for the dam started in 1974, with construction of roads and a support point at the Koda seasonal settlement.

The filling required relocating various small settlements and flooded the valleys of several tributaries, including the Koda river.

[7] The power station is owned and operated by JSC Boguchanskaya GES, a joint venture of RusHydro and Rusal, who also built it.

The Angara flows in latitudinal direction here, cutting through Cambrian and Ordovician sedimentary massif interspersed with diabase intrusions.

The river's supply is greatly dependent on the Lake Baikal and superincumbent reservoirs of Irkutsk, Bratsk and Ust-Ilimsk dams.

[citation needed] The downstream part of the river has a shallow channel too and stays unavailable for large seaworthy ships.

The latter variant presumes construction of the largest hydro power plant in Russia with an annual production of over 40 TWh.