Idukki arch dam stands on the Periyar between Kuravanmala and Kurathimala and supports a 780 MW power station
Background
Hook: KSEB is drawing peak-hour power from outside the State, which puts its own Idukki dam in focus.
The Idukki arch dam is built on the Periyar River.
It stands between two mountains, Kuravanmala (839 m) and Kurathimala (925 m).
It is described as 168.91 m (554 ft) tall and as one of the highest arch dams in Asia.
Technically it is a concrete double curvature parabolic thin arch dam.
The dam was constructed by and is owned by the Kerala State Electricity Board and supports a 780 MW hydroelectric power station.
River:
Periyar
Height:
168.91 m (554 ft)
Hills either side:
Kuravanmala (839 m) and Kurathimala (925 m)
Power station:
780 MW
Why it matters for exams: Dam height, river and ownership are common Kerala PSC and UPSC geography facts.
Kerala PSCUPSC
In plain words
Arch dam — A curved dam that carries water pressure into the valley walls.