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The idukki Hydroelectric project,
the biggest of Kerala. Underground
power house is located at Moolamattom,
which is 95 kms from Cochin.For
the people of Kerala, Idukki is
always associated with Power Generation.
About 66% of the State's Power needs
come from the Hydroelectric Power
Projects in Idukki.Idukki accounts
for 12.9 percent of the area of
Kerala and only 3.7 percent of the
population of Kerala. About 50%
of its area are Reserved ForestsFor the people of Kerala, Idukki is always associated with power generation since about 60 per cent of the state’s power needs come from the hydroelectric power station at Moolamattom, the biggest in the state. The famous Idukki arch dam, the first of its kind in India, is built between two huge granite hills across the river Periyar.
Idukki Arch Dam: This is
the world's second and Asia's first
arch dam, constructed across the
Kuravan and Kurathi hills. 550 ft.
High and 650 ft. Wide, the dam lies
close to the Cheruthoni Barrage.
To its West is the Kulamavu Dam.
Idukki wildlife sanctuary is located
closeby. 
The
Idukki Wildlife Sanctuary:
This sanctuary extends
over the Thodupuzha and Udumpanchola
taluks of Idukki district, spreading
over 77 sq. Km and is about 450
- 748 m above sea level. The Idukki
reservoir formed by three dams -
Cheruthoni, Idukki and Kulamavu
- extends to 33 sq km. extends over
the Thodupuzha and Udumpanchola
taluks of Idukki district, spreading
over 77 sq. km and is about 450
- 748 m above sea level. The Idukki
Reservoir formed by three dams -
Cheruthoni, Idukki and Kulamavu
- extends to 33 sq km. One can find
Elephant, bison, sambar deer, wild
dog, jungle cat, tiger, wild boar
etc. and variety of Snakes like
Cobra, viper, krait and a number
of non poisonous snakes in this
Sancturey. The birds in Idukki are
Jungle fowl, myna, laughing thrush,
black bulbul, peafowl, woodpecker,
kingfisher etc