geo.wikisort.org - Reservoir

The Karuma Hydroelectric Power Station is a 600 MW hydroelectric power project under construction in Uganda. When completed, it will be the largest power-generating installation in the country.[4]

Karuma Hydro Power Station
Map of Uganda showing the location of Karuma Falls Show map of Uganda Karuma Hydroelectric Power Station (Africa) Show map of Africa Karuma Hydroelectric Power Station (Earth) Show map of Earth
Official name	Karuma Hydropower Station
Country	Uganda
Location	Karuma Falls
Coordinates	02°14′51″N 32°16′05″E
Status	Under construction[1]
Construction began	16 December 2013
Opening date	October 2022 (Expected)
Construction cost	US$1.7 billion
Owner(s)	Uganda Government
Operator(s)	Uganda Electricity Generation Company Limited (UEGCL)
Dam and spillways
Type of dam	Mass concrete
Impounds	Victoria Nile
Height	14
Length	314.43
Elevation at crest	1032
Spillways	8
Reservoir
Total capacity	7987x10
Normal elevation	1,000 m (3,300 ft)
Operator(s)	UEGCL
Commission date	June 2023 (expected)[2]
Type	Run of the river
Hydraulic head	71 metres (233 ft)
Turbines	6 x 100 MW (Francis)
Installed capacity	(planned) 600 MW
Annual generation	4,373 GWh[3]

Location

The power station is located on the Victoria Nile, at the former location of the Karuma Falls. This location is approximately 2.5 kilometres (1.6 mi) upstream of where the Masindi-Gulu Highway crosses the Nile. By road, it is approximately 99 kilometres (62 mi) northeast of Masindi[5] and 75 kilometres (47 mi) south of Gulu.[6] The geographical coordinates of Karuma Hydroelectric Power Station are:02°14'51.0"N, 32°16'05.0"E (Latitude:2.247500; Longitude:32.268056).[7]

The electrical-mechanical installations of the power station are located approximately 100 metres (328 ft) underground, with 26.5 kilometres (16 mi) of underground access roads, making Karuma, the 14th largest underground power station in the world.[8]

History

As far back as 1995, the government of Uganda planned to construct a hydropower station at the site of the Karuma Falls. Initially, Norpak, a Norwegian energy company, was awarded the contract to perform the feasibility study and the environmental impact assessment (EIA) for the dam. The World Bank promised to make a loan available to pay for the construction.[9] The feasibility study report was made available in October 2006. Bids for construction of the project went out in November 2006. Initially, the plan was to build a 200-250 megawatt power station.[10]

In 2009, the plans were redrawn, calling for a much larger project of 750 megawatts. Sometime during 2009, Norpak pulled out of the negotiations with the Ugandan government, citing the Global Recession of 2008 to 2012.[11]

The Ugandan government then contracted with Energy Infratech Private Limited to perform a new feasibility study and a new EIA, given that a larger power station was now being planned.[12] At that time, construction was expected to start in 2012 and last six years.[13]

In July 2011, media reports indicated that the maximum capacity of the project had been scaled back to 600 megawatts from 750 megawatts. Some international development partners wanted to scale back even further, to a maximum capacity of 400 to 450 megawatts.[14]

Technical specifications

Karuma Power Station comprises a roller compacted concrete gravity dam, that measures 20 metres (66 ft) high and 312 metres (1,024 ft) long. There are six water intake towers, each measuring 20 metres (66 ft) high and 29 metres (95 ft) wide. The underground chamber housing the six vertical Francis turbines of 100MW each, measures 200 metres (656 ft) long, 21.3 metres (70 ft) wide, and 53 metres (174 ft) high.[15]

Construction costs

In January 2011, Energy Infratech Private Limited, the Indian company contracted to perform the feasibility study for the project, said the estimated total cost for the dam and power plant was approximately US $2.2 billion. That figure included the cost needed to build a transmission line from Karuma to a location where the power will be integrated into the national power grid.[16]

The power generated will be transmitted via high voltage wires to three substations as follows:[17] (a) a 264 kilometres (164 mi) 400 kilovolt line to Kawanda UETCL Substation in Wakiso District (b) an 80 kilometres (50 mi) 132 kilovolt line to Lira and (c) a 60 kilometres (37 mi) 400 kilovolt line to a substation in Olwiyo, Nwoya District. The construction costs for the high voltage transmission lines are estimated at US$250 million.[18] In June 2013, the Ugandan government awarded the construction contract to Sinohydro, a Chinese construction company. Work began in the second half of 2013 and is expected to last five years. Construction costs will be jointly funded by the Ugandan and Chinese governments.[19][20][21] In June 2014, the Exim Bank of China committed in writing to fund 85 percent of the construction costs, in the form of a concessionary loan repayable in five years. The Ugandan government will fund the remaining 15 percent of the cost.[22][23]

In March 2015, the Ugandan Parliament assented to two loans totalling US$1.435 billion, from the Export-Import (EXIM) Bank of China, for the construction of the power station. Of that amount, US$789.3 million will be loaned at 2 percent per annum, repayable over 20 years, while US$645.82 million will attract 4 percent interest, payable over 15 years, effective the day the dam is fully commissioned. Uganda has already invested US$253.26 million to start the construction.[24] That brings the total funds committed to the project as, of March 2015, to US $1,688,380,000.

As of June 2018, with approximately 76 percent of the work completed, the total construction budget was quoted at US$1.7 billion, with US$1.4 billion for construction of the power station, and US$300 million going towards the new transmission lines and new substations.[25]

Construction work

The construction of the dam and power station officially started on 12 August 2013.[26][27] In March 2015, Sinohydro, the lead contractor on the project, contracted with Alstom to provide equipment and technical services to the power station, in a deal worth US$65 million. The equipment includes six 100 megawatt Francis turbines and related equipment.[28] At the peak of construction, it is expected that a total of 2,500 casual and permanent workers will be hired.[27] The power station is expected to be commissioned in 2018.[29][30]

As of March 2016, about 30 percent of the work had been completed.[31] In October 2016, it was estimated that about 1,000 Chinese nationals and about 5,000 Ugandans were working at the power station.[32]

In February 2018, the Red Pepper Newspaper reported that work equivalent to 74 percent of the entire project had been completed and commissioning of the power station was expected in December 2018.[33]

As of June 2018, fifty-six months since the beginning of construction, an estimated 76 percent of the physical work had been completed. Of the 6,000 workers, 5,300 are Ugandan. The first 200 MW of power are expected online in December 2018, and the rest in 2019. Each unit of power is expected to cost the consumer US$0.049 for the first 10 years of the life of the power station, after which the price will drop down to US$0.020 per unit, for the next 15 years. Three new substations, one each at Karuma, Kawanda and Olwiyo, are part of the construction contract. The substation at Lira will also undergo an upgrade to accommodate power from Karuma.[25]

As of April 2019, the Daily Monitor newspaper reported that the work on the power station was approximately 80 percent complete, while the three high voltage transmission lines were 80 to 85 percent complete. Commissioning of the completed power station is expected in December 2019.[34][35]

In September 2019, an estimated 95 percent of construction had been completed. This included 100 percent completion of the Karuma–Lira High Voltage Line, 100 percent of the Karuma–Kawanda High Voltage Power Line and 98 percent of the Karuma–Olwiyo High Voltage Line. Commissioning of the power station is planned for December 2019.[36]

Recent developments

In addition to the high voltage transmission lines to Lira, Olwiyo and Kawanda, that belong to Uganda Electricity Transmission Company Limited (UETCL), Umeme, the largest national distributor will spend USh4 billion (US$1.1 million) to construct a network of 33kV lines from Karuma to Kigumba and on to the districts of Lira, Gulu, Masindi and Hoima. Commissioning of the power station had been moved to November 2020.[2]

In May 2021, following touring of the work site, the chairperson of the board of Uganda Electricity Generation Company Limited (UEGCL), Engineer Proscovia Margaret Njuki, set the date of commissioning as 22 June 2022.[37] In June 2021 it was reported that 98.8 percent of the work was complete with the contractor having already addressed some of the works that didn't conform with the plans and actively working on the rest.[38]

In July 2022, the Daily Monitor reported that the power station would be brought online, one turbine at a time, with the first 100 MW unit starting in October 2022 and the sixth and final unit commissioned in June 2023.[39]

Photos and diagrams

• Photo of Karuma Falls at Gorillatales.com

Lira–Gulu–Agago High Voltage Power Line

Lira–Gulu–Agago High Voltage Power Line
Location
Country	Uganda
Coordinates	2.802500°N 32.304444°E / 2.802500; 32.304444
General direction	South to North
From	Lira, Uganda
Passes through	Gulu
To	Agago, Uganda
Ownership information
Owner	Government of Uganda
Operator	Uganda Electricity Transmission Company Limited
Construction information
Construction started	TBD
Expected	TBD
Technical information
Type of current	AC
Total length	140 mi (230 km)
AC voltage	132kV
No. of circuits	2

The Lira–Gulu–Agago High Voltage Power Line is a planned high voltage power line in the Northern Region of Uganda.[40][41][42][43][44]

Location

The 132 kilovolt power line would start at the 132 kV Uganda Electricity Transmission Company Limited (UETCL) substation at Lira. The line would travel in a general northeast direction to the city of Gulu, approximately 132 kilometres (82 mi) away, by road.[45] From Gulu, the power line would travel in a general easterly direction for about 160 kilometres (99 mi), to end at Agago.[46] The total distance traveled by the power line is estimated at approximately 230 kilometres (143 mi), since the line does not follow the road all the time.[40]

Overview

This power line is intended to distribute electricity generated from power stations on the Victoria Nile to the Northern Region of Uganda. It is also intended to evacuate power from the Achwa Hydroelectricity Power Station Complex, including Achwa 2 Hydroelectric Power Station, under construction as of January 2018, and Achwa 3 Hydroelectric Power Station, under development.[47] The main objective is to improve the quantity, quality and reliability of electricity supplied to the region.[40]

Construction

As of June 2017, the website of the Electricity Regulatory Authority, stated that (a) preparation for implementation of the population resettlement plan were underway, (b) the updated feasibility study was in its final stages, (c) the pre-qualification of the contractors was ongoing and (d) the tender evaluation had been concluded. The scope of work involves the construction of a new 132kV electricity substation at Agago.[48] In January 2016, the German government committed to lend €40 million, on soft terms, towards the construction of this power line.[41]

See also

References

External links

• Karuma Power Dam: Steering Committee Inspects Works With Progress At 94 Percent As at 25 June 2019.
• Environmental Impact Assessment By NEMA
• Potential Hydropower Projects In Uganda

На других языках

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- [en] Karuma Hydroelectric Power Station

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[fr] Barrage de Karuma

Le barrage de Karuma est un barrage situé en Ouganda près des chutes éponymes. Le barrage a une capacité hydroélectrique de 600 MW. Sa construction a démarré en 2013 pour se terminer en 2018. Le projet a été construit par Sinohydro et financé par l'aide financière du gouvernement chinois notamment via un prêt de 1,4 milliard de dollars[1],[2].

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