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Doyang
Location: Nagaland
Operator: North Eastern Electric Power Corp Ltd
Configuration: 3 X 25 MW Francis
Operation: 2000
T/G supplier: BHEL
EPC: Gammon India
Quick facts: This plant is in Wokha Dist on the
Doyang River, a tributary of the Brahmaputra. There are three 132kV grid
connections, Doyang-Dimapur, Doyang-Mokukchang, and Doyang-Kohima.
Photograph courtesy of
North Eastern Electric Power Corp Ltd
Posted 20 Jan 2007 |
Karbi Langpi
Location: Assam
Operator: Assam State Electricity Board
Configuration: 2 X 50 MW Francis
Operation: 2007
T/G supplier: Fuji
EPC: Gammon, Hydel Construction, Texmoco Ltd, Saraswati Engineering,
Frontier Engineering, Unioson Infrastructure, Sumitomo
Quick facts: During 1976/77, Assam SEB completed a
detailed survey of the hydropower potential of the Borpani (Langpi) River
basin. The run-of-river Karbi Langpi HEP in Karbi Anglong district is the last stage development of the basin and utilizes an average
head of 235m. The project was sanctioned by the Planning Commission in
1979 and infrastructure construction started soon thereafter with
commissioning scheduled by 1986, but there were numerous interruptions.
The contractors were replaced in 1987, again in 1993, and a third time in
2000 when the state government took back the project and revested it to
ASEB. Work resumed in Apr 2000, but was severely handicapped by lack of
funds. This situation was not resolved until the Assam government made two
loans plus a counter-guarantee enabling a loan from PFC. In
Mar 2005, ASEB prepared detailed action plans and restarted work. The
first unit was commissioned on 30 Jan 2007 and the second on 20 Mar 2007.
Power is evacuated to Guwahati through a 108k, double-circuit
220kV line. The concrete gravity dam is 52m high and 197m long .
Photograph courtesy of
Gammon India Ltd
Posted 15 Nov 2008 |
Kopili
Location: Assam
Operator: North Eastern Electric Power Corp Ltd
Configuration: 4 X 50 MW Francis
Operation: 1988-1997
T/G supplier: BHEL
EPC: Gammon
Quick facts: This plant on the River Kopili in the
North Cachar Hills was the first NEEPCO project when it came into
existence in 1976. The scheme has dam and dike systems creating two
reservoirs, one on the Kopili River and the other on its tributary the
Umrong. Water from the Kopili reservoir passes through a 2,759m tunnel to
the Khandong power station (2 X 25 MW) and tail water is led to the Umrong
reservoir. The water from Umrong reservoir is taken through a 5,473m
tunnel to Kopili.
Photograph courtesy of North
Eastern Electric Power Corp Ltd
Posted 20 Jan 2007 |
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Ranganadi-I
Location: Arunachal Pradesh
Operator: North Eastern Electric Power Corp Ltd
Configuration: 3 X 135 MW Francis
Operation: 1965
T/G supplier: BHEL
Quick facts: Ranganadi is a two-stage development in
Lower Subansiri Dist, 90km from North Lakhimpur. The first stage of the
project is a run-of-the-river scheme with a 60m concrete gravity diversion
dam, a 10km, 6.8m diameter tunnel, and a powerhouse on the left bank of
the River Dikrong. The proposed second stage involves construction of a
134m concrete-rockfill composite dam and a 180-MW powerhouse. The plant is
connected at 400kV Ranganadi-Balipara and at 132kV Ranganadi-Nirjuli.
Photograph courtesy of North Eastern Electric Power Corp Ltd
Posted 20 Jan 2007 |
Rangit
Location: Sikkim
Operator: NHPC Ltd
Configuration: 3 X 20 MW Francis
Operation: 2000
T/G supplier: BHEL
Quick facts: Rangit in South Sikkim Dist has a 45m high, 100m long
concrete gravity dam, a 4.5m dia, 3km long head race tunnel,
and a surface power house. The plant was commissioned in Dec 1999 and puts out about 340 HWh/yr.
Photograph courtesy of National Hydroelectric Power Corp
Posted 10 July 2004 |
Subansiri Lower
Location: Arunachal Pradesh
Operator: NHPC Ltd
Configuration: 8 X 250 MW Francis
Operation: 2012
T/G supplier: Alstom
EPC: Larsen & Toubro, Boguchangesstroy, Soyuzgidrospetsstroy, Soma
Enterprises, Texmaco
Quick facts: In Aug 2003, Subansiri Lower was cleared by the Indian
Cabinet, the last administrative approval needed for construction of the
Rs8,950cr project. The site is on the Subansiri River in North Lakhimpur,
Dhemaji district, on the border of Assam and Arunachal Pradesh. This is
India’s largest active hydroelectric project. The main EPC contract was
awarded in Jan 2004 and, in Apr 2005, Alstom was contracted for the T/G
sets. Subansiri Lower features a 116m dam, eight headrace tunnels from
600-1,170m in length, surge tunnels and pressure shafts, and a surface
powerhouse. The plant is expected online by the end of 2012, about 2yrs
past the schedule when the turbines were ordered.
Photograph courtesy of NHPC Ltd
Posted 26 Jun 2010 |
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Teesta Stage V
Location: Sikkim
Operator: NHPC Ltd
Configuration: 3 X 170 MW Francis
Operation: 2008
T/G supplier: Toshiba
EPC: Mitsui, Hindustan Construction
Quick facts: This is is one of six cascade hydropower schemes on
River Teesta in East Sikkim District. Annual production is about 2.5 TWh. The installation has a 96.5m high concrete gravity dam, a
9.5m dia, 17km horse-shoe shaped headrace tunnel , three D-shaped 6m dia, 175m long tailrace tunnels and an underground powerhouse.
The plant cost about Rs2,198cr.
Photograph courtesy of NHPC Ltd
Posted 31 Mar 2010 |
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