Subansiri (Lower)
Subansiri Lower HE Project is a Run of River scheme with small Pondage on river Subansiri. The Project is located near North Lakhimpur on the border of Arunachal Pradesh and Assam. The nearest railhead is Gogamukh/North Lakhimpur and nearest airport is Lilabari / Dibrugarh. The estimated annual energy generation from the Project is 7421.59 MU in a 90% dependable year.
| Feature Name | Description |
|---|---|
| Location | Located in Lower Subansiri in Arunachal Pradesh and Assam |
| Approach | Nearest Rail Head is Gogamukh/North Lakhimpur & Nearest Airport is Lilabari / Dibrugarh |
| Capacity | 2000 MW (8x250 MW) |
| Design Energy | 7421.59 MU ( 90% dependable year) |
| Date of Commercial Operation (COD) | Project is likely to be completed in MAY 2026 |
| Project Cost | Rs.6285.33 Crores (December 2002 Price Level) Now Anticipated: Rs. 26075.54 Crores (at Completion cost) Level) |
- A concrete gravity dam 116 m high from river bed level.
- Head Race Tunnel - 8 Nos., 9.5m dia, horse shoe shaped, 7102m total length.
- Surge Tunnels - 8 Nos., 9.5 m dia., horse shoe shaped 3545m total length.
- Pressure Shaft- 8Nos., Circular, 9.5/8/7m dia, length 192m to 215m, 8 Nos., Vertical pressure shafts - each 48m deep..
- Surface power house to accommodate 8 units of Francis turbines of 250 MW capacity each.
- Tail race channel, 206 m x 35 m (W x L)