Overview:
Commissioned in 1980, the Baira Siul HEP is a 180 MW run-of-the-river project developed and operated by NHPC Limited. Located in the Chaurah subdivision of Chamba, it harnesses the combined flow of the Baira, Siul, and Bhaledh streams, all tributaries of the Ravi River. With its underground powerhouse and high-head design, it marked a major milestone in India’s early hydropower development.
📍 Location & Key Details
| Attribute | Details |
|---|---|
| Coordinates | 32.8063°N, 76.1418°E |
| District | Chamba |
| River System | Baira, Siul, Bhaledh → Ravi |
| Installed Capacity | 180 MW (3 × 60 MW Francis turbines) |
| Commissioned | 1980 |
| Operator | NHPC Ltd |
| Project Type | Run-of-the-river |
| Reservoir Capacity | 3.75 million cubic meters |
| Net Head | 238.1 meters |
🏗️ Engineering Highlights
- Intake & Diversion:
Water is diverted from the Baira and Siul rivers through a network of tunnels and channels. - Penstocks:
Three steel-lined penstocks, each 476 meters long and 2.75 meters in diameter, deliver water to the turbines. - Powerhouse:
Underground facility housing three Francis turbines, each rated at 60 MW. - Rehabilitation & Modernization:
Between 2018 and 2021, all three units underwent complete renovation, extending the plant’s life by 25 years.
🌄 Environmental & Strategic Context
- Minimal Displacement:
As a run-of-the-river project with limited reservoir storage, it caused minimal ecological disruption. - Legacy Value:
As NHPC’s first operational plant, Baira Siul set the benchmark for future hydro projects across India. - Power Distribution:
Supplies electricity to Tata Power Delhi Distribution and other northern utilities under long-term PPAs.
🧭 Accessibility
- Nearest Towns:
- Tissa and Bhalai in Chaurah subdivision
- Chamba town (~60 km away)
- By Road:
Accessible via Chamba–Tissa–Bhalai road, though terrain is steep and winding. - By Train:
Nearest major railhead: Pathankot (~150 km) - By Air:
Gaggal Airport (Kangra) – ~170 km
