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Offline Charles Dickson

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Kainji Dam Tourist Center
« on: August 16, 2019, 11:38:50 AM »
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  • Kainji Dam Tourist Center

    Kainji Dam is a dam across the Niger River in Niger State of Northern Nigeria. Construction of the dam was carried out by Impregilo (a consortium of Italian Civil Engineering Contractors) to designs by Joint Consultants, Balfour Beatty and Nedeco, and began in 1964 to be completed in 1968. The total cost was estimated at US$209 million (equivalent to about US$1.3 billion in 2018 dollars[1]), with one-quarter of this amount used to resettle people displaced by the construction of the dam and its reservoir, Kainji Lake.


        1 Dimensions
        2 Power station
        3 Lock
        4 Discharge flooding
        5 Lake Kainji
        6 See also
        7 References


    Kainji dam is located in Borgu LGA of Niger State. Kainji Dam comprises the civil dam structure, the gated spillway, the hydroelectric turbine and generators, and a navigation lock, with monitoring and control systems to all these.

    Kainji powerhouse is equipped with eight turbine-alternator groups including four Kaplan type rated at 80 MW, two turbines also Kaplan type rated at 100 MW and two propeller turbines rated at120 MW. The available head ranges between 23.8 m and 41.2 m according to the water level in the reservoir. Provision was made for a further four turbines in the dam structure but these were never installed.

    The development perimeter comprises the main concrete gravity dam with earth embanked dams on either side of the main and saddle dams, which closes a secondary valley, and two gates. The main dam is 550m long with a maximum height of 64m. It comprises the water intakes, the flood evacuator and the abutments. The powerhouse is located downstream of the dam, on the right bank, and at right angles to the water intakes. The reservoir, which presently forms the Lake Kainji, is 136 km long and has a capacity of 15 billion m.

    The dam stores and safely releases water to generate hydroelectric power, provide flood protection and, originally, support navigation.
    Kainji Dam extends for about 10 kilometres (6.2 mi), including its saddle dam, which closes off a tributary valley. The primary section across the outflow to the Niger is 550 metres (1,800 ft). Most of the structure is made from earth, but the centre section, housing the hydroelectric turbines, was built from concrete. This section is 65 metres (213 ft) high. Kanji Dam is one of the longest dams in the world.[2]
    Power station

    The dam was designed to have a generating capacity of 960 megawatts (1,290,000 hp); however, only 8 of its 12 turbines have been installed, reducing the capacity to 760 megawatts (1,020,000 hp).[3] The dam generates electricity for all the large cities in Nigeria. Some of the electricity is sold to the neighbouring country of Niger. In addition, occasional droughts have made the Niger's water flow unpredictable, diminishing the dam's electrical output.

    The dam has a single-lock chamber capable of lifting barges 49 metres (161 ft).
    Discharge flooding

    In October 1998 in response to upstream flooding, a torrent of water was released from the dam, bursting the river banks. Downstream from the dam 60 villages were flooded. Domestic animals drowned and dikes as well as several farms were washed away. Dam officials were criticized for waiting too long before starting, then dumping too much water.[4]
    Lake Kainji
    Kainji Lake measures about 135 kilometres (84 mi) long and about 30 kilometres (19 mi) at its widest point, and supports irrigation and a local fishing industry.[5] In 1999, uncoordinated opening of floodgates led to local flooding of about 60 villages

    From Wikipedia


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    Kainji Dam Tourist Center
    « on: August 16, 2019, 11:38:50 AM »
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    Kainji National Park

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