Annual Report 2006-2007 - Gammon India

. Hydro Electric Projects
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Annual Report 2006-2007
The Hydro Sector continues to grow at a much faster pace, since the Government has announced an
ambitious plan of completing 50000 MW Hydropower Projects by 2012. In addition to conventional
contracting various state governments have also announced hydropower projects on BOT Basis. This
Financial year we have been awarded two contracts for civil works at Rampur for Sutlej Jal Vidyut Nigam
Limited valued at Rs. 800 crores in Joint Venture with Patel Engineering Limited, Mumbai. Your Company
has secured two hydropower projects on BOT Basis through its subsidiary company. Some of the Hydro
Power projects being executed by Gammon include :
1. Teesta HRT
This is a long and large diameter tunnel for Teesta V Project of NHPC having installed capacity of
510 MW. The 14 km long with 9.5m diameter horse shoe shaped tunnel is nearing completion.
2. Parbati Stage II
Gammon is executing package - 3 of Parbati Hydroelectric Project, Stage II which is valued at Rs.
603.5 crores. The work is in advanced stage of construction and about 70% of the work has been
completed. An outstanding feature of this project are the two inclined pressure shafts at 30° having
excavated diameter of 4.8m are bored by Double Shield Tunnel Boring Machine (TBM) with precast
segmental lining and the inclined tunnel of this length has been done for the first time in India.
3. Parbati Stage III
The work at Parbati Stg. III for installed capacity of 540 MW was started last year and is progressing
well. The major components of this project are HRT having 7.25m finished diameter and length of 2 km
having underground powerhouse, underground transformer cavern, tail race tunnel of 8.1m diameter
and 2.7 km length, two vertical pressure shafts of 300m depth each having finished diameter of 4.5m
and a surge shaft of 134m deep and diameter of 13m.
4. Sewa HEP
Sewa HEP is for 120 MW installed capacity. The work on the dam is nearing completion and tunnel
boring is almost 72% complete.
5. Kol Dam
The work at Kol Dam is having installed capacity of 800 MW and is in progress and 60% of the work
has been completed.
6. Rampur HEP
The Project has river diversion 224m long and 10m dia horseshoe shaped Diversion Tunnel and
Cofferdams, Head Race Tunnel 12900m long and 10.5m dia circular including 43m long cut and cover
at river crossing, spill tunnel 335m long and 10.15m dia horse shoe shaped, surge tunnel 400m long
and 10m dia horse shoe shaped and Adit Plug 3 numbers and 1 number of Bulkhead Gate.
7. Karbi Langpi Dam
Your Company has successfully completed another major project i.e. the Karbi Langpi Dam in the
state of Assam for Assam State Electricity Board.
c. Nuclear Power Plants
Construction of Nuclear Power Plants appears uncertain due to an acute shortage of nuclear fuel and
uncertainty of imports. However the Government has planned to produce 60000 MW by the year 2020.
The Government of India is also in talks with several countries such as Russia, France, Japan and USA
for its nuclear power programme. Though these countries have shown interest in getting associated, it is
characterized by uncertainty due to delay in clearance of Indo-US agreement on Nuclear energy. However
it is expected that this issue is likely to be sorted out some time in October 2007 after which it is expected
that the Nuclear Supply group will start supplying India’s requirement and this will create and give a fillip
to the activity in this segment.