The 240MW Uri-II hydroelectric plant is the second run-of-the-river power project on the Jhelum River in the Uri area of Baramullah District, Jammu and Kashmir, India. State-owned National Hydro Power Corporation (NHPC) is developing the project downstream of the existing 480MW Uri-I power plant which was commissioned in 1997.
The power plant consists of four 60MW generating units. Three of the four units were commissioned by the end of 2013 and the fourth unit was inaugurated in July 2014.
The hydroelectric project is located near the border of India and Pakistan. Pakistan had objected the construction of the controversial Indian power plant alleging the violation of Indus Water Treaty signed between the two countries in 1960. The treaty allows the three rivers Indus, Jhelum and Chenab to flow into Pakistan. India’s Intelligence Bureau (IB) warned of a possible terrorist attack at the project.
The Uri-II hydroelectric project consists of a 52m tall and 157m long concrete gravity dam with four 9m wide spillways, a 4.23km long head race tunnel with 8.4m diameter, a restricted orifice type surge shaft of 25m diameter, two 5m diameter steel lined penstocks, four 3.5m diameter bifurcated steel lined penstocks, an underground powerhouse, and a horse shoe shaped tailrace tunnel 3.61km in length.
The project has been designed to make use of Jhelum waters at a gross head of about 130m following the discharge of Uri-I tail water upstream.
The powerhouse cavern of the plant is 133m long, 15m wide and 40m high. The powerhouse accommodates four Francis vertical turbines of 60MW capacity each. The plant is designed for a maximum water flow of 225cubic metres per second.
Construction of the INR17.24bn ($277.26m) hydroelectric power project started in 2005. The construction work, however, suffered significant delay due to an earthquake and frequent flooding of River Jhelum.
Construction of the 337m long diversion tunnel of 8.8m diameter to channelise the river for facilitating the dam construction was completed by the beginning of 2007. The dam structure involving 100,000 cubic metres of concrete was completed in March 2011. Construction of the power house and switchyard as well as key tunnelling works was carried out thereafter.
Rock support methods involving wire mesh, shotcrete, steel rib, rock bolt and rock anchor were used for the tunnelling work in adverse geological conditions.
The power project construction involved 1.92million cubic metres of excavation including 670,000 cubic metres of rock excavation and 980,000 cubic metres of underground excavation.
The electricity generated from the Uri-II plant is evacuated at 400kV and fed into India’s Northern grid via the 114km long Uri-II-Uri-I Inter-connector transmission line and the Uri-II-Wagoora transmission line.
The Uri-II hydroelectric project is expected to generate 1,123.76million units of electricity annually. The power output of the plant will be supplied to the states of Jammu & Kashmir, Uttarakhand, Uttar Pradesh, Haryana, Delhi, Punjab, Rajasthan and Chandigarh.
Hindustan Construction Company (HCC), an Indian infrastructure company was awarded the civil works contract for the Uri-II power plant construction in 2005. The scope of the contract involved the construction of dam, surge and pressure shafts, headrace and tailrace tunnels, and the underground powerhouse.
Alstom was awarded a turnkey contract worth $91.3m for the electro-mechanical components, including four Francis turbines, generators and auxiliaries for the Uri-II hydroelectric plant in January 2007.
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