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Julius Nyerere Hydropower Plant and Dam - Tanzania

Employer: Tanzanian Ministry of Energy
Contractors: JV Arab Contractors Company and Elsewedy Electric
Project location: Stigler's Gorge Area, the dam is located in the Morogoro area on Rufiji River - Tanzania
Completion Period: 42 months including 6 months mobilization

Project Objectives:
Generating electricity with capacity of 2115MW to satisfy energy needs in Tanzania Control water flow in the period of flooding and thus providing the necessary water requirement

Main items:

-Total excavation is about 4 million m3
-Total aggregate backfilling is about 7.5 million m3
-Total volume of concrete is about 2.6 million m3
-Total weight of reinforced steel is about 64000 ton

Scope of Work:
-Main dam for storage of water to generate hydropower using RCC concrete for main dam with total length 1025m at crest level and 130m dam level
-Construction of 4 saddle dams for reservoir impounding of water with length of 1.4km, 7.9km, 4.6km and 2.6km with a maximum height 21.3m, 14m, 12.4m and 5.5m respectively, with a capacity to impound approximately 33 billion m3 of water
-Construction of a hydropower plant with a capacity of 2115mw and a substation of 400kv; in addition to 400kv transmission lines to the nearest point of the public network The civil works includes the following:
-Permanent access roads connecting the site with the existing roads network and length about 21km
-Temporary access roads that connect all permanent facilities with length of 59km
-Main dam of RCC on Rufiji River Power plant with administration building, control building, workshops and stores
-Connecting power station 400kv including transmission lines 4 variable height and length dams for water impounding of reservoir Diversion tunnel 660m length (15*17m) and 2 cofferdams
-The main spillway is located on the center of the main dam with 7 radial gates and an emergency spillway is located in the first saddle -Permanent concrete bridge on Rufiji River
-Integrated residential complex on an area of 19000m including housing and playground, permanent furnished offices; in addition to temporary residential complex, utilities, lighting, drinking water and water treatment

Main electromechanical works for power house:
-Power plant 2115 -9 vertical Francis turbines, each turbine capacity is 235mw
-9 butterfly valves for entrance
-9 vertical axis generators
-Water and sewage cooling systems
-Ventilation, air-conditioning, firefighting and communication systems
-Protection, control and monitoring equipment
-3 diesel generators for the power plant, dam and spillway
-Other supplementary items