| Tunnel |
| Umiumtaru Tunnel, Meghalaya - Oct
83 - Sep 92 |
 |
|
|
 |
| Doyang Diversion Tunnel,
Nagaland - 1991 - 1995 |
- Biggest Dia of Tunnel Excavated by GIL.
- 12m dia circular (Finished), 654m long.
|
 |
| Doyang Water
Conductor system, Nagaland - 1992 - 1996 |
- Circular Tunnel of 6m finished
- 6.60m excavated Daimeter
- 432m long out of which 60m length is inclined at 45 degrees
with vertical.
|
 |
| Ranganadi Main Tunnel,
Arunachal Pradesh - 1994 - 2000 |
- Head Race Tunnel of Horse shoe type of 6.75M (Finished)
- 7.5m (Excavated) dia
- 3700m Long
- Inclined penstock tunnel of 542m length and
- Surge shaft of 25m/16m dia 98m deep
|
 |
| Ranganadi Diversion
Tunnel, Arunachal Pradesh - 1990 - 1994 |
- Circula Tunnel of 6m Dia
- 220m long
|
|
| Srisailem Left Bank
Lift Scheme Tunnels, Andhra Pradesh - 1998 - 2002 |
- 6.8m Finished Dia 1481m long Adit 319m long, with Surge pool
and Pump House 20m x 60m and 60m Deep
|
 |
| Salal Tail Race Tunnel,
Himachal Pradesh |
- 12m finished dia circular
- 2600m long
|
 |
| Salal Drainage gallery,
Himachal Pradesh |
|
|
 |
| Malana Head Race Tunnel,
Himachal Pradesh - May 99 - Jun 01 |
- 3.65m Finished, D Shaped, 3075m Long with 272m Heigh Inclined
Surge Shaft.
|
 |
| Ongoing Projects |
| Teesta Head Race Tunnel,
Sikkim - Oct 01 - Nov 07 |
- 14 km long head race tunnel of 9.5m finished dia with Adits
of 1km.
|
 |
| Parbati HE Project Stage-II
Tunnels, Himachal Pradesh - Sep 02 - 2011 |
| Total length of tunels of variuos shapes and dia is
15.5 km. Which includes 6.8 km HRT of 6m finished dia, twin inclined
tunnels of 1542m length bored by TBM. |
 |
| Parbati HE Project Stage-III
Tunnels, Himachal Pradesh - Dec 05 - 2010 |
| Total length of tunnels of variuos shapes and dia
is 7.95km. Which includes 2 km HRT of m finished 7.25m dia, 2.67 km
Tail race tunnel 8.1m dia horse shoe. 134m surge shaft, vertical pressure
shafts 300m. |
 |
| Sewa HE Project HRT,
Jammu and Kashmir - Sep 03 - Aug 08 |
| 10 km longh head race tunnel of 3.3m finished dia,
horseshoe, Desilting chambers, Silt flushing tunnels, Diversion tunnel
of 280 m 6m dia. |
 |
| Koldam HE Project UG
Penstocks, Himachal Pradesh - Mar 04 - Sep 08 |
| 4 Nos of incliend penstocks of 175m each 8.4m modified
horse shoe tunnel Total Tunnels of 1710m length. |
 |
| Rampur HE Project Tunnels,
Himachal Pradesh - Mar 07 - 2011 |
| Construction of Civil Works for Head Race Tunnel inclusive
cut & cover Section, River Diversion Works, Adits, Surge Shaft,
Pressure Shafts, Valve House, Power House Complex, Tail Race Tunnel
Adits And Hydro Mechanical Works. |
 |
| |
|
Nuclear Power Projects: Major
Nuclear Power Projects
Hydro Power Projects: Dams | Tunnel
| Power House | TBM
Tunnelling
Thermal Power Projects: Natural
Draft Cooling Towers | Counter
Flow Cooling Towers | Chimneys
|
