The Ranganadi Dam is a concrete-gravity diversion dam

Diversion dam

A diversion dam is the term for a dam that diverts all or a portion of the flow of a river from its natural course. Diversion dams do not generally impound water in a reservoir...

 on the Ranganadi River in Arunachal Pradesh

Arunachal Pradesh

Arunachal Pradesh is a state of India, located in the far northeast. It borders the states of Assam and Nagaland to the south, and shares international borders with Burma in the east, Bhutan in the west, and the People's Republic of China in the north. The majority of the territory is claimed by...

, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 which serves a run-of-the-river scheme. The dam is intended for hydroelectric purposes and is part of Stage I of the Ranganadi Hydro Electric Project and supports the 405MW Dikrong Power House

Power station

A power station is an industrial facility for the generation of electric energy....

 at 27°15′27"N 93°47′32"E. The 68 m (223.1 ft) tall dam diverts water south into a 10.1 km (6.3 mi) headrace tunnel which is then transferred into a 1062 m (3,484.3 ft) penstock

Penstock

A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydraulic turbines and sewerage systems. It is a term that has been inherited from the technology of wooden watermills....

before reaching the three 135 MW turbines. Since commissioning, the power house has been generating much less than its capacity because of drought.

Stage II of the project is designed to provide water storage for Stage I and includes a 134 m (439.6 ft)
rock-fill embankment dam with a 523000000 cubic metre storage capacity. This dam will support an additional 180 MW
power house.