Brahamaputra Basin

Brahamaputra Basin
150 MW of eachgeneration capacity, with mean annual inflow of 4534.52 MCM. The expected
annual generation is 3592 MU in 90% dependable year. Lower Subansiri project is under
NEEPCO.
g) Teesta-V (Operational): Teesta-V HE project is in Teesta River at Balutar, Sikkim. It has 2572 MU
of designed energy. The power house is underground with 3 units of 170 MW each generation
capacity.
h) Teesta Low Dam Stage-III (Under Construction): It is being constructed on Teesta River in
Darjeeling distt.of West Bengal.The project will have 32.5 m high barrage and the power plant
will have installed capacity of 4X33 MW or 132 MW to annually generate 594.07 MU in a 90%
dependable year.
i) Umiam-III (Operational): This is the 3 rd in the series of projects with Umiam-I of 36 MW and
Umium-II of 18 MW capacity. Umiam III HE project consists of Kyrdemkulai concrete gravity
dam on Umium & Umtru River, tributaries of Brahmaputra.Umiam-II power house has 2 units of
30 MW each. It has a firm power of 16 MW. Meghalaya state electricity board commissioned
the project in 1979.
j) Umiam-IV (Operational): Umiam-IV hydroelectric power consists of Nongkhylle dam across
Umtru River. The power house is located at a distance of 55 kmfrom Shillomg in Ri Bhoi district
of Meghalaya. Umiam-IV power house has 2 units of 30 MW each, with mean annual inflow of
52 MCM. It has a firm power of 15 MW. Meghalaya State Electricity Board commissioned the
project in 1992.
k) Dibang (Planning): Dibang is Central Electricity Authority (CEA) concurred hydroelectric project
in the Dibang / Tangon River in Lower Dibang Valley District of Arunachal Pradesh. The
underground power house has 12 units of 250 MW capacity with annual Inflow of 21616.38
MCM. The Design Energy is 11330 MU.
3.2.3 Dams, Barrages/Weirs/Anicuts
Dams, barrage, weirs, dnicuts are manmade water resources structures to store and divert river
water for different purposes i.e hydropower, irrigation, drinking water supply etc. The spatial
distribution of dams, barrage and weirs in the basin are shown in the Map 11a and Map 11b.
Major dams of the Brahmaputra basin are - Subansiri Lower HE (NHPC) & Ranganadi of Arunachal
Pradesh, Khandong dam of Meghalaya, Doyang HEP dam of Nagaland, & Rangit-III dam of Sikkim etc.
Salient feature of these major dams are given below -
a) Subansiri Lower: The Lower Subansiri dam is under construction falling in lower Subansiri &
Dhemaji District (Arunachal Pradesh & Assam respectively). It is a concrete gravity dam of 130
m height with volume 2250 Cubic meter. The reservoir of Subansiri Lower dam will have gross
storage capacity of 1365 MCM.
b) Lower Teesta-IV: Teesta-IV, dam is a concrete gravity dam has been constructed on Teesta
River, a tributary of Brahmaputra River, near town Siliguri in West Bengal. The height and the
length of the dam are 511 and 30 m respectively and gross storage capacity is 36.63 MCM.
c) Ranganadi: Ranganadi dam is a concrete gravity dam has been constructed on Ranganadi River,
a tributary of Brahmaputra River, 50 km from Zir City in Arunachal Pradesh. The height of the
dam is 68 m and gross storage capacity is 21.28 MCM.
www.india-wris.nrsc.gov.in 38