Upper Siang Hydroelectric Project
| Upper Siang Multipurpose Project | |
|---|---|
| Country | India |
| Location | Upper Siang district, Arunachal Pradesh |
| Coordinates | 28°41′32″N 95°02′39″E / 28.6921°N 95.0443°E |
| Purpose | Hydroelectric & Flood control |
| Status | Pre-construction works |
| Construction began | 2028 |
| Opening date | 2032 (Expected) |
| Construction cost | US$ 13 billion |
| Owner(s) | Government of Arunachal Pradesh |
| Operator(s) | NHPC |
| Dam and spillways | |
| Impounds | Siang River |
| Reservoir | |
| Total capacity | 320 tmcft |
| Maximum water depth | 300 meters |
| Power Station | |
| Operator(s) | NHPC |
| Commission date | 2032 |
| Installed capacity | 11,000 MW (under construction) |
| Annual generation | 47 billion kWh |
The Upper Siang Hydroelectric Project or Upper Siang Multipurpose Project or Siang Upper Multipurpose Project (SUMP) consists of the construction of several hydroelectric power dams in the Upper Siang district of Arunachal Pradesh, India. Construction work on the project was commenced by the National Hydroelectric Power Corporation (NHPC) in April 2009 and various hydro dams will be constructed in phases over a span of 15–20 years.
The main dam is being constructed across Siang river and upon completion, the dam reservoir will hold 9 billion cubic meters of water. The hydro power project at Siang will alone generate approximately 11,000 MW, making it the largest hydroelectric dam in the Indian Subcontinent.