Overview:
Commissioned in 2020, the Sawra Kuddu HEP is a 111 MW run-of-the-river project developed by Himachal Pradesh Power Corporation Limited (HPPCL). Built on the Pabbar River, a tributary of the Yamuna, this project is known for its piano key weir, underground powerhouse, and minimal surface disruption. It generates approximately 386 million units (MU) of clean electricity annually.
📍 Location & Key Details
| Attribute | Details |
|---|---|
| Coordinates | Near Snail village, Rohru subdivision, Shimla district |
| River | Pabbar (tributary of Yamuna) |
| Installed Capacity | 111 MW (3 × 37 MW Francis turbines) |
| Commissioned | 2020 |
| Operator | HPPCL |
| Project Type | Run-of-the-river |
| Annual Generation | ~386 MU |
🏗️ Engineering Highlights
- Piano Key Weir:
First of its kind in Asia, this weir design allows efficient overflow and sediment control while occupying less space. - De-silting Chambers:
Three surface gutter-type chambers (80 m × 19.5 m × 10.5 m each) remove silt particles down to 0.2 mm, protecting turbine blades. - Headrace Tunnel:
A 11.145 km-long, 5 m diameter D-shaped tunnel carries water to the powerhouse. - Surge Shaft & Pressure Shaft:
- Surge Shaft: 82 m high, 14 m diameter
- Pressure Shaft: 4 m diameter, trifurcating into 2.3 m branches to feed turbines
- Powerhouse:
Underground cavern (90 m × 14 m × 39 m) located on the left bank of the Pabbar River near Snail village.
🌄 Environmental & Social Context
- Minimal Displacement:
Underground design and careful alignment minimized land acquisition and ecological impact. - Eco-sensitive Design:
Located in a relatively pristine valley, the project was built with strict environmental safeguards. - Local Benefits:
The project has improved road connectivity, employment, and infrastructure in the Rohru region.
🧭 Accessibility
- Nearest Town: Rohru (~15 km)
- By Road:
- From Shimla: ~110 km via Theog–Kotkhai–Jubbal–Rohru route
- From Chandigarh: ~200 km via NH-5 and Rohru link road
- By Train:
Nearest railhead: Shimla (narrow gauge); broad gauge access via Kalka - By Air:
Shimla Airport (Jubbarhatti) – ~120 km
