Budhi Gandaki Hydroelectric Project (341MW)

HTR, in joint venture with Hydro Consult, Multiconsult (Norway), and SSC, is carrying out the Detailed Engineering Design of a Peaking Run-of-River hydropower project of 341 MW on the Budhi Gandaki River in Gorkha District, covering the waterways, powerhouse, and tailrace system.

Major features:

Design Discharge 100.27m3/sec, Gross head 398m, Plant Capacity 341MW

The project comprises a 5.95 km-long concrete-lined headrace tunnel (modified horseshoe, 6.8 m diameter) with multiple construction adits. A surge tunnel (~781 m) is provided to control pressure fluctuations, connected to a system of vertical and inclined pressure shafts (~334 m total length, 5.0 m diameter). The underground powerhouse cavern (approx. 101 m × 17 m × 35 m) accommodates four vertical-axis Pelton turbines (4 × 85.25 MW) along with a transformer and auxiliary caverns. The tailrace system includes an inverted D-shaped tailrace tunnel (~1.38 km long) conveying discharge back to the river.  The generated flow is discharged through a 1.38 km long tailrace tunnel (inverted D-shape) to the downstream. Power evacuation is ensured through a 220 kV double-circuit transmission line (~45 km).