India
Himachal Pradesh
NHPC Ltd.
Parbati Hydro Project has Asia's Second Longest Tunnel
Parbati H E P is 800 MW . Project involved Construction of Concrete Dam , Diversion Tunnel, Desilting Chamber & intake Structure. 800 MW Capacity Project involves Construction of Diversion Cum Spillway Tunnels including Gates, Coffer dams, Rockfill dam, Spillway, Intake Structures and Part Head Race Tunnel
Gravity type concrete Dam: 85m High
Head Race Tunnel: 3.5km, 6.5m dia
Diversion Tunnel: 7.5m
Desilting chamber: 15m X 16m
Intake tunnel: 3.7m dia
Flushing tunnel: 3 Nos
Feeder tunnel: 690m long, 3m dia