Grand Ethiopian Renaissance Dam

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Grand Ethiopian Renaissance Dam
Grand Ethiopian Renaissance Dam is located in Ethiopia
Grand Ethiopian Renaissance Dam
Location of Grand Ethiopian Renaissance Dam in Ethiopia
LocationBenishangul-Gumuz Region
Coordinates11°12′55″N 35°05′35″E / 11.21528°N 35.09306°E / 11.21528; 35.09306Coordinates: 11°12′55″N 35°05′35″E / 11.21528°N 35.09306°E / 11.21528; 35.09306
StatusUnder construction
Construction beganApril 2011
Opening dateJuly 2020[1]
Construction cost$5 billion USD
Owner(s)Ethiopian Electric Power
Dam and spillways
Type of damGravity, roller-compacted concrete
ImpoundsBlue Nile River
Height145 m (476 ft)[2]
Length1,780 m (5,840 ft)
Elevation at crest655 m (2,149 ft)
Dam volume10,200,000 m3 (13,300,000 cu yd)
Spillways1 gated, 2 ungated
Spillway type6 sector gates for the gated spillway
Spillway capacity14,700 m3/s (520,000 cu ft/s) for the gated spillway
CreatesMillennium Reservoir
Total capacity74×10^9 m3 (60,000,000 acre⋅ft)
Active capacity59.2×10^9 m3 (48,000,000 acre⋅ft)
Inactive capacity14.8×10^9 m3 (12,000,000 acre⋅ft)
Catchment area172,250 km2 (66,510 sq mi)
Surface area1,874 km2 (724 sq mi)
Maximum length246 km (153 mi)
Maximum water depth140 m (460 ft)
Normal elevation640 m (2,100 ft)
Power Station
Commission date2020–2022[3][4]
Turbines14 x 400 MW
2 x 375 MW
Francis turbines
Installed capacity6.35 GW (max. planned)[5]
Capacity factor28.6%
Annual generation16,153 GWh (est., planned)[5]

The Grand Ethiopian Renaissance Dam (GERD or TaIHiGe; Amharic: ታላቁ የኢትዮጵያ ሕዳሴ ግድብ, romanizedTālāqu ye-Ītyōppyā Hidāsē Gidib), formerly known as the Millennium Dam and sometimes referred to as Hidase Dam (Amharic: ሕዳሴ ግድብ, romanizedHidāsē Gidib), is a gravity dam on the Blue Nile River in Ethiopia under construction since 2011. The dam is in the Benishangul-Gumuz Region of Ethiopia, about 45 km (28 mi) east of the border with Sudan.[6]

The primary purpose of the dam is electricity production to relieve Ethiopia’s acute energy shortage and for electricity export to neighboring countries. With a planned installed capacity of 6.45 gigawatts, the dam will be the largest hydroelectric power plant in Africa when completed,[7] as well as the seventh largest in the world.[8][9][10]

Filling the reservoir began in July 2020.[1][11] It will take between 4 and 7 years to fill with water,[12] depending on hydrologic conditions during the filling period and agreements reached between Ethiopia, Sudan, and Egypt.[13]


The eventual site for the Grand Ethiopian Renaissance Dam was identified by the United States Bureau of Reclamation in the course of the Blue Nile survey, which was conducted between 1956 and 1964 during the reign of Emperor Haile Selassie. Due to the coup d'état of 1974, however, the project failed to progress. The Ethiopian Government surveyed the site in October 2009 and August 2010. In November 2010, a design for the dam was submitted by James Kelston.[14]

On 31 March 2011, a day after the project was made public, a US$4.8 billion contract was awarded without competitive bidding to Italian company Salini Impregilo, and the dam's foundation stone was laid on 2 April 2011 by then Prime Minister Meles Zenawi.[15] A rock-crushing plant was constructed, along with a small air strip for fast transportation.[16] The expectation was for the first two power-generation turbines to become operational after 44 months of construction, or early 2015.[17]

Egypt, located over 2,500 kilometres downstream of the site, opposes the dam, which it believes will reduce the amount of water available from the Nile.[18] Zenawi argued, based on an unnamed study, that the dam would not reduce water availability downstream and would also regulate water for irrigation.[17] In May 2011, it was announced that Ethiopia would share blueprints for the dam with Egypt so that the downstream impact could be examined.[19]

The dam was originally called "Project X", and after its contract was announced it was called the Millennium Dam.[20] On 15 April 2011, the Council of Ministers renamed it Grand Ethiopian Renaissance Dam.[21] Ethiopia has a potential for about 45 GW of hydropower.[22] The dam is being funded by government bonds and private donations. It was slated for completion in July 2017.[14]

The potential impacts of the dam have been the source of severe regional controversy.[23] The Government of Egypt, a country which relies heavily on the waters of the Nile, has demanded that Ethiopia cease construction on the dam as a precondition to negotiations, has sought regional support for its position, and some political leaders have discussed methods to sabotage it.[24] Egypt has planned a diplomatic initiative to undermine support for the dam in the region as well as in other countries supporting the project such as China and Italy.[25] However, other nations in the Nile Basin Initiative have expressed support for the dam, including Sudan, the only other nation downstream of the Blue Nile. Sudan has accused Egypt of inflaming the situation.[26]

Ethiopia denies that the dam will have a negative impact on downstream water flows and contends that the dam will, in fact, increase water flows to Egypt by reducing evaporation on Lake Nasser.[27] Ethiopia has accused Egypt of being unreasonable; Egypt is demanding to increase its share of the Nile's water flow from 66% to 90%.[27] In October 2019, Egypt stated that talks with Sudan and Ethiopia over the operation of a $4 billion hydropower dam that Ethiopia is building on the Nile have reached a deadlock.[28] Beginning in November 2019, U.S. Secretary of the Treasury Steven T. Mnuchin began facilitating negotiations between the three countries.[29]

Cost and financing[edit]

The Ethiopian government has stated that it intends to fund the entire cost of the dam by itself in order to prevent relying on foreign countries who may be brought under pressure by Egypt to withdraw their support. Ethiopia has issued a bond targeted at Ethiopians in the country and abroad to that end.[17] The turbines and associated electrical equipment of the hydropower plants costing about US$1.8 billion are reportedly financed by Chinese banks. This would leave US$3 billion to be financed by the Ethiopian government through other means.[30] The estimated US$4.8 billion construction cost, apparently excluding the cost of power transmission lines, corresponds to about 5% of Ethiopia's gross domestic product of US$87 billion in 2017.


Renaissance Dam and associated facilities

The design changed several times between 2011 and 2017. This affected both the electrical parameters and the storage parameters.

Originally, in 2011, the hydropower plant was to receive 15 generating units with 350 MW nameplate capacity each, resulting in a total installed capacity of 5,250 MW with an expected power generation of 15,128 GWh per year.[31] Its planned generation capacity was later increased to 6,000 MW, through 16 generating units with 375 MW nominal capacity each. The expected power generation was estimated at 15,692 GWh per year. In 2017, the design was again changed to add another 450 MW for a total of 6,450 MW, with a planned power generation of 16,153 GWh per year.[5][32] That was achieved by upgrading 14 of the 16 generating units from 375 MW to 400 MW without changing the nominal capacity.[33]

Not only the electrical power parameters changed over time, but also the storage parameters. Originally, in 2011, the dam was planned to be 145 m (476 ft) tall with a volume of 10.1 million m³. The reservoir was planned to have a volume of 66 km3 (54,000,000 acre⋅ft) and a surface area of 1,680 km2 (650 sq mi) at full supply level. The rock-filled saddle dam besides the main dam was planned to have a height of 45 m (148 ft) meters, a length of 4,800 m (15,700 ft) and a volume of 15 million m³.[14][34]

In 2013, an Independent Panel of Experts (IPoE) assessed the dam and its technological parameters. At that time, the reservoir sizes were changed already. The size of the reservoir at full supply level went up to 1,874 km2 (724 sq mi) (plus 194 km²). The storage volume at full supply level had increased to 74 km3 (60,000,000 acre⋅ft) (plus 7 km³).[35] These numbers did not change after 2013.

After the IPoE made its recommendations, in 2013, the dam parameters were changed to account for higher flow volumes in case of extreme floods: a main dam height of 155 m (509 ft) (plus 10 meters) with a length of 1,780 m (5,840 ft) (no change) and a dam volume of 10.2 million m³ (plus 0.1 million m³). The outlet parameters did not change, only the crest of the main dam was raised. The rock saddle dam went up to a height of 50 m (160 ft) (plus 5 meters) with a length of 5,200 m (17,100 ft) (plus 400 meters). The volume of the rock saddle dam increased to 16.5 million m3 (plus 1.5 million m3).[35][36]

The design parameters as of August 2017 are as follows, given the changes as outlined above:

Two dams[edit]

Rendition of the main dam

The zero level of the main dam, the ground level, will be at a height of almost exactly 500 m (1,600 ft) above sea level, corresponding roughly to the level of the river bed of the Blue Nile. Counting from the ground level, the main gravity dam will be 145 m (476 ft) tall, 1,780 m (5,840 ft) long and composed of roller-compacted concrete.[2][11] The crest of the dam will be at a height of 655 m (2,149 ft) above sea level. The outlets of the two powerhouses are below the ground level, the total height of the dam will, therefore, be slightly higher than that of the given height of the dam. In some publications, the main contractor constructing the dam puts forward a number of 170 m (560 ft) for the dam height, which might account for the additional depth of the dam below ground level, which would mean 15 m (49 ft) of excavations from the basement before filling the dam. The structural volume of the dam will be 10,200,000 m3 (13,300,000 cu yd). The main dam will be 40 km (25 mi) from the border with Sudan.

Supporting the main dam and reservoir will be a curved and 4.9 km (3 mi) long and 50 m (164 ft) high rock-fill saddle dam.[11] The ground level of the saddle dam is at an elevation of about 600 m (2,000 ft) above sea level. The surface of the saddle dam has a bituminous finish, to keep the interior of the dam dry. The saddle dam will be just 3.3–3.5 km (2–2 mi) away from the border with Sudan, it is much closer to the border than the main dam.

The reservoir behind both dams will have a storage capacity of 74 km3 (60,000,000 acre⋅ft) and a surface area of 1,874 km2 (724 sq mi) when at full supply level of 640 m (2,100 ft) above sea level. The full supply level is therefore 140 m (460 ft) above the ground level of the main dam. Hydropower generation can happen between reservoir levels of 590 m (1,940 ft), the so-called minimum operating level, and 640 m (2,100 ft), the full supply level. The live storage volume, usable for power generation between both levels is then 59.2 km3 (48,000,000 acre⋅ft). The first 90 m (300 ft) of the height of the dam will be a dead height for the reservoir, leading to a dead storage volume of the reservoir of 14.8 km3 (12,000,000 acre⋅ft).[35]

Three spillways[edit]

The dams will have three spillways. All using approximately 18,000 cubic meters of concrete. These spillways together are designed for a flood of up to 38,500 m3/s (1,360,000 cu ft/s), an event not considered to happen at all, as this discharge volume is the so-called 'Probable Maximum Flood'. All waters from the three spillways are designed to discharge into the Blue Nile before the river enters Sudanese territory.

The main and gated spillway is located to the left of the main dam and will be controlled by six floodgates and have a design discharge of 14,700 m3/s (520,000 cu ft/s) in total. The spillway will be 84 m (276 ft) wide at the outflow gates. The base level of the spillway will be at 624.9 m (2,050 ft), well below the full supply level.

An ungated spillway, the auxiliary spillway, sits at the center of the main dam with an open width of about 205 m (673 ft). This spillway has a base-level at 640 m (2,100 ft), which is exactly the full supply level of the reservoir. The dam crest is 15 m (49 ft) higher to the left and to the right of the spillway. This ungated spillway is only expected to be used, if the reservoir is both full and the flow exceeds 14,700 m3/s (520,000 cu ft/s), a flow value, that is expected to be exceeded once every ten years.

A third spillway, an emergency spillway, is located to the right of the curved saddle dam, with a base level at 642 m (2,106 ft). This emergency spillway has an open space of about 1,200 m (3,900 ft) along its rim. This third spillway will carry water only if the conditions for a flood of more than around 30,000 m3/s (1,100,000 cu ft/s) are given, corresponding to a flood to occur only once every 10,000 years.

Power generation and distribution[edit]

Flanking either side of the auxiliary ungated spillway at the center of the dam will be two power houses. The right will contain 10 x 375 MW Francis turbine-generators, the left power house will house 6 x 375 MW of the same turbine-generators. 14 of the 16 turbine-generators have been upgraded to 400 MW without changing the nameplate capacity (which is still at 375 MW), while two turbine-generators remained at 375 MW.[36][33] The total installed capacity with all turbine-generators will be 6,450 MW. The average annual flow of the Blue Nile being available for power generation is expected to be 1,547 m3/s (54,600 cu ft/s),[35] which gives rise to an annual expectation for power generation of 16,153 GWh, corresponding to a plant load factor (or capacity factor) of 28.6%.

The Francis turbines inside the power houses are installed in a vertical manner, raising 7 m (23 ft) above the ground level. For the foreseen operation between the minimum operating level and the full supply level, the water head available to the turbines will be 83–133 m (272–436 ft) high. A switching station will be located close to the main dam, where the generated power will be delivered to the national grid. Four 500 kV main power transmission lines were completed in August 2017, all going to Holeta and then with several 400 kV lines to the metropolitan area of Addis Ababa.[37] Two 400 kV lines run from the dam to the Beles Hydroelectric Power Plant. Also planned are 500 kV high-voltage direct current lines.

Early power generation[edit]

Two non-upgraded turbine-generators with 375 MW each are the first to go into operation with 750 MW delivered to the national power grid. This early power generation will start well before the completion of the dam, when the filling of the reservoir commences. The two units sit within the 10 unit powerhouse to the right side of the dam at the auxiliary spillway. They are fed by two special intakes within the dam structure that are located at a height of 540 m (1,770 ft) above sea level. It is foreseen, that power generation can start at a water level of 560 m (1,840 ft), 30 m (98 ft) below the minimum operating level of the other 14 turbine-generators. At that level, the reservoir has been filled with roughly 5.5 km3 (1.3 cu mi) of water, which corresponds to roughly 11% of the annual inflow of 48.8 km3 (11.7 cu mi). During the rainy season, this is expected to happen within days to weeks. First stage filling of the reservoir for early generation was complete on 20 July 2020.[38][39]

Siltation, evaporation[edit]

Satellite image of the reservoir on 26 October 2020

Two "bottom" outlets at 542 m (1,778 ft) above sea level or 42 m (138 ft) above the local river bed level are available for delivering water to Sudan and Egypt under special circumstances, in particular for irrigation purposes downstream, if the level of the reservoir falls below the minimum operating level of 590 m (1,940 ft) but also during the initial filling process of the reservoir.

The space below the "bottom" outlets is the primary buffer space for alluvium through siltation and sedimentation. For the Roseires Reservoir just downstream from the GERD site, the average siltation and sedimentation volume (without GERD in place) amounts to around 0.035 km3 (28,000 acre⋅ft) per year. Due to the large size of the GERD reservoir, the siltation and sedimentation volume is expected to be much higher in this case, 0.21 km3 (170,000 acre⋅ft) per annum.[35][40] The GERD reservoir will foreseeably take away the siltation threat from the Roseires reservoir almost entirely.

The base of the GERD dam is at around 500 m (1,600 ft) above sea level. Water flowing out of the dam will be released into the Blue Nile again which will flow for only around 30 km (19 mi), before joining the Roseires reservoir, which – if at full supply level – will be at 490 m (1,610 ft) above sea level. There is only a 10 m (33 ft) elevation difference between both projects. The two reservoirs and accompanying hydropower projects could – if coordinated properly across the border between Ethiopia and Sudan – become a cascaded system for more efficient hydropower generation and better irrigation (in Sudan in particular). Water from the 140 m (460 ft) column of the water storage of the GERD reservoir could be diverted through tunnels to facilitate new irrigation schemes in Sudan close to the border with South Sudan. In Ethiopia itself, no irrigation schemes are planned due to the proximity of the dam to the downstream border with Sudan.

Evaporation of water from the reservoir is expected to be at 3% of the annual inflow volume of 48.8 km3 (11.7 cu mi), which corresponds to an average volume lost through evaporation of around 1.5 km3 (0.36 cu mi) annually. This was considered negligible by the IPoE.[35] For comparison, Lake Nasser in Egypt loses between 10–16 km3 (2.4–3.8 cu mi) annually through evaporation.[41]


The main contractor is the Italian company Webuild (formerly Salini Impregilo), which also served as primary contractor for the Gilgel Gibe II, Gilgel Gibe III, and Tana Beles dams. Simegnew Bekele was the project manager of GERD from the start of construction in 2011 up to his death on 26 July 2018. The dam is expected to consume 10 million metric tons of concrete. The government has pledged to use only domestically produced concrete. In March 2012, Salini awarded the Italian firm Tratos Cavi SPA a contract to supply low- and high-voltage cable for the dam.[36][42] Alstom will provide the eight 375 MW Francis turbines for the project's first phase, at a cost of €250 million.[43] As of April 2013, nearly 32 percent of the project was complete. Site excavation and some concrete placement was underway. One concrete batch plant has been completed with another under construction.[44] Diversion of the Blue Nile was completed on 28 May 2013 and marked by a ceremony the same day.[45] By January 2016 the dam had 4 million cubic meters of concrete poured, and the installation of the first two turbines was imminent. The first power production of 750 MW was slated for sometime later that year.[46]

In October 2019, the work was approximately 70% complete.[47] As of March 2020, the steelworks reached 35% complete, civil works are 87% complete while electro-mechanical works are 17% complete, to attain in total 71% construction complete according to Belachew Kasa, Project Deputy Director.[48]

On 26 June 2020, Egypt, Sudan, and Ethiopia agreed to delay filling the dam for a few weeks.[49]

On 21 July 2020, Ethiopian prime minister, Abiy Ahmed, announced that the first filling of the dam has been completed.[50] The early filling of the dam was attributed to the heavy rains. In his statement, Abiy stated that "We have successfully completed the first dam filling without bothering and hurting anyone else. Now the dam is overflowing downstream".[50] The target for the first year filling was 4.9 billion cubic meters, while the dam has capacity to hold 74 billion cubic meters when completed.[51]

The first phase of filling the reservoir began in July 2020, to a maximum depth of 70 metres (230 ft) utilising a temporary sill. Further construction work is necessary before the dam can be filled to a level for electricity generation.[1][11]

In February 2021, Ethiopian Minister of Water and Irrigation, Selchi Bakli, mentioned that the engineering work in constructing the dam reached 91%, while the total construction rate was 78.3%.[52]


Engineering questions[edit]

Dam construction in 2014

In 2012, the International Panel of Experts was formed with experts from Egypt, Sudan, Ethiopia, and other independent entities to discuss mainly engineering and partially impact related questions. This panel concluded at a number of engineering modifications, that were proposed to Ethiopia and the main contractor constructing the dam. One of the two main engineering questions, dealing with the size of flood events and the constructive response against them, was later addressed by the contractor. The emergency spillway located near the rock saddle dam saw an increase of the rim length from 300 m to 1,200 m to account even for the largest possible flood of the river.

The second main recommendation of the panel however found no immediate resolution. This second recommendation dealt with the structural integrity of the dam in context with the underlying rock basement as to avoid the danger of a sliding dam due to an unstable basement. It was argued by the panel, that the original structural investigations were done with considering only a generic rock mass without taking special conditions like faults and sliding planes in the rock basement (gneiss) into account. The panel noted, that there was indeed an exposed sliding plane in the rock basement, this plane potentially allowing a sliding process downstream. The panel didn't argue that a catastrophic dam failure with a release of dozens of cubic kilometers of water would be possible, probable or even likely, but the panel argued, that the given safety factor to avoid such a catastrophic failure might be non-optimal in the case of the Grand Ethiopian Renaissance Dam.[35] It was later revealed that the underlying basement of the dam was completely different from all expectations and did not fit the geological studies as the needed excavation works exposed the underlying gneiss. The engineering works then had to be adjusted, with digging and excavating deeper than originally planned, which took extra time and capacity and also required more concrete.[4]

Alleged over-sizing[edit]

Originally, in 2011, the hydropower plant was to receive 15 generating units with 350 MW nameplate capacity each, resulting in a total installed capacity of 5,250 MW with an expected power generation of 15,128 GWh per annum.[31] The capacity factor of the planned hydropower plant – the expected electricity production divided by the potential production if the power plant was utilized permanently at full capacity – was only 32.9% compared to 45–60% for other, smaller hydropower plants in Ethiopia. Critics concluded that a smaller dam would have been more cost-effective.[31]

Soon after, in 2012, the hydropower plant was upgraded to receive 16 generating units with 375 MW nameplate capacity each, increasing the total installed capacity to 6,000 MW, with the expected power generation going up only slightly to 15,692 GWh per annum. Consequently, the capacity factor shrank to 29.9%. According to Asfaw Beyene, a Professor of Mechanical Engineering at San Diego State University (California), the dam and its hydropower plant are massively oversized: "GERD’s available power output, based on the average of river flow throughout the year and the dam height, is about 2,000 megawatts, not 6,000. There is little doubt that the system has been designed for a peak flow rate that only happens during the 2–3 months of the rainy season. Targeting near peak or peak flow rate makes no economic sense."[53][54]

In 2017, the total installed capacity was moved to 6,450 MW, without changing the number and nameplate capacity of the generating units (which then remained at 6,000 MW in total). This was thought to arrive from enhancements made to the generators.[8] The expected power generation per annum went up to 16,153 GWh,[5] the capacity factor shrank again and reached 28.6%. This time nobody publicly voiced concern. Such optimization of the Francis turbines used at the dam site is indeed possible and is usually done by the provider of the turbines taking into account site-specific conditions.

Considering the critics voiced about the alleged over-sizing of the possible power output, now of 6,450 MW. Ethiopia is relying heavily on hydropower, but the country is often affected by droughts (see e.g. 2011 East Africa drought). The water reservoirs used for power generation in Ethiopia have a limited size. For example, the Gilgel Gibe I reservoir, that feeds both the Gilgel Gibe I powerplant and the Gilgel Gibe II Power Station, has a capacity of 0.7 km3. In times of drought, there is no water left to generate electrical power. This heavily affected Ethiopia in the drought years 2015/16 and it was only the Gilgel Gibe III powerplant, that in 2016 just started to run in trial service on a 14 km3 well-filled reservoir, that saved the economy of Ethiopia.[4] The GERD-reservoir, once it has filled, has a total water volume of 74 km3, 3 times the volume of Ethiopia's largest lake, Lake Tana. Filling it takes 5–15 years and even by using all generating units at maximum capacity will not drain it within a few months. The installed power of 6.450 MW in combination with the size of the reservoir will help to manage the side effects of the next severe drought, when other hydropower plants have to stop their operations.


A major benefit of the dam will be hydropower production. All the energy generated by GERD will be going into the national grid of Ethiopia to fully support the development of the whole country, both in rural and urban areas. The role of GERD will be to act as a stabilizing backbone of the Ethiopian national grid. There will be exports, but only if there is a total surplus of energy generated in Ethiopia. This is mainly expected to happen during rainy seasons, when there is plenty of water for hydropower generation.[4]

The eventual surplus electricity of GERD which does not fit the demand inside Ethiopia, is then to be sold and exported to neighboring countries including Sudan and possibly Egypt, but also Djibouti. Exporting the electricity from the dam would require the construction of massive transmission lines to major consumption centers such as Sudan's capital Khartoum, located more than 400 km away from the dam. These export sales would come on top of electricity that is expected to be sold from other large hydropower plants. Powerplants that have been readied or are under construction in Ethiopia, such as Gilgel Gibe III or Koysha, whose exports (if given surplus energy) will mainly be going to Kenya through a 500 kV HVDC line.

The volume of the reservoir will be two to three times that of Lake Tana. Up to 7,000 tonnes of fish are expected to be harvested annually. The reservoir may become a tourist destination.[55]

Environmental and social impacts[edit]

Renaissance Reservoir

The NGO International Rivers has commissioned a local researcher to make a field visit because so little environmental impact information is publicly available.[56]

Public consultation about dams in Ethiopia is affected by the political climate in the country. International Rivers reports that "conversations with civil society groups in Ethiopia indicate that questioning the government’s energy sector plans is highly risky, and there are legitimate concerns of government persecution. Because of this political climate, no groups are actively pursuing the issues surrounding hydro-power dams, nor publicly raising concerns about the risks In this situation, extremely limited and inadequate public consultation has been organised" during the implementation of major dams.[57] In June 2011, Ethiopian journalist Reeyot Alemu was imprisoned after she raised questions about the proposed Grand Millennium Dam. Staff of International Rivers have received death threats.[citation needed] Former prime minister Meles Zenawi called opponents of the project "hydropower extremists" and "bordering on the criminal" at a conference of the International Hydropower Association (IHA) in Addis Ababa in April 2011. At the conference, the Ethiopian state power utility was embraced as a "Sustainability Partner" by the IHA.[58]

Impact on Ethiopia[edit]

Since the Blue Nile is a highly seasonal river, the dam would reduce flooding downstream of the dam, including on the 15 km stretch within Ethiopia. On the one hand, the reduction of flooding is beneficial since it protects settlements from flood damage. On the other hand, it can be harmful if flood recession agriculture is practiced in the river valley downstream of the dam since it deprives fields from being watered. However, the next water regulating dam in Sudan, the Roseires Dam, sits only a few dozens of kilometers downstream. The dam could also serve as a bridge across the Blue Nile, complementing a bridge that was under construction in 2009 further upstream.[59] An independent assessment estimated that at least 5,110 people will be resettled from the reservoir and downstream area, and the dam is expected to lead to a significant change in the fish ecology.[56] According to an independent researcher who conducted research in the area, 20,000 people are being relocated. According to the same source, "a solid plan (is) in place for the relocated people" and those who have already been resettled "were given more than they expected in compensation". Locals have never seen a dam before[citation needed] and "are not completely sure what a dam actually is", despite community meetings in which affected people were informed about the impacts of the dam on their livelihoods. Except for a few older people, almost all locals interviewed "expressed hope that the project brings something of benefit to them" in terms of education and health services or electricity supply based on the information available to them. At least some of the new communities for those relocated will be downstream of the dam. The area around the reservoir will consist of a 5 km buffer zone for malaria control that will not be available for settlement. In at least some upstream areas erosion control measures will be undertaken in order to reduce siltation of the reservoir.[60]

Impact on Sudan and Egypt[edit]

Grand Ethiopian Renaissance Dam
Click here to expand this image
  Grand Ethiopian Renaissance Dam

The precise impact of the dam on the downstream countries is not known. Egypt fears a temporary reduction of water availability due to the filling of the dam and a permanent reduction because of evaporation from the reservoir. Studies indicate that the primary factors which will govern the impacts during the reservoir filling phase include the initial reservoir elevation of the Aswan High Dam, the rainfall that occurs during the filling period and the negotiated arrangement between the three countries. These studies also show that only through close and continuous coordination, the risks of negative impacts can be minimized or eliminated.[13] The reservoir volume (74 billion cubic meters) is about 1.5 times the average annual flow (49 billion cubic meters) of the Blue Nile at the Sudanese-Egyptian border. This loss to downstream countries could be spread over several years if the countries reach an agreement. Depending on the initial storage in the Aswan High Dam and this filling schedule of the GERD, flows into Egypt could be temporarily reduced, which may affect the income of two million farmers during the period of filling the reservoir. Allegedly, it would also "affect Egypt's electricity supply by 25 to 40 percent, while the dam is being built".[61] However, hydropower accounts for less than 12 percent of total electricity production in Egypt in 2010 (14 out of 121 billion kWh),[62] so that a temporary reduction of 25 percent in hydropower production translates into an overall temporary reduction in Egyptian electricity production of less than 3 percent. The Grand Ethiopian Renaissance Dam could also lead to a permanent lowering of the water level in Lake Nasser if floods are stored instead in Ethiopia. This would reduce the current evaporation of more than 10 billion cubic meters per year, but it would also reduce the ability of the Aswan High Dam to produce hydropower to the tune of a 100 MW loss of generating capacity for a 3 m reduction of the water level. However, the increased storage in Ethiopia can provide a greater buffer to shortages in Sudan and Egypt during years of future drought, if the countries can reach a compromise.

The dam will retain silt. It will thus increase the useful lifetime of dams in Sudan – such as the Roseires Dam, the Sennar Dam and the Merowe Dam – and of the Aswan High Dam in Egypt. The beneficial and harmful effects of flood control would affect the Sudanese portion of the Blue Nile, just as it would affect the Ethiopian part of the Blue Nile valley downstream of the dam.[63] Specifically, the GERD would reduce seasonal flooding of the plains surrounding the reservoir of the Roseires Dam located at Ad-Damazin, just as the Tekeze Dam, by retaining a reservoir in the deep gorges of the northern Ethiopian Highlands, had reduced flooding at Sudan's Khashm el-Girba Dam.[64]

The reservoir, located in the temperate Ethiopian Highlands and up to 140 m deep, will experience considerably less evaporation than downstream reservoirs such as Lake Nasser in Egypt, which loses 12% of its water flow due to evaporation as the water sits in the lake for 10 months. Through the controlled release of water from the reservoir to downstream, this could facilitate an increase of up to 5% in Egypt's water supply, and presumably that of Sudan as well.[65]

Reactions: cooperation and condemnation[edit]

Ethiopia's move to fill the dam's reservoir could reduce Nile flows by as much as 25%.[66]

Egypt has serious concerns about the project[67] so that it requested to be granted inspection allowance on the design and the studies of the dam, in order to allay its fears, but Ethiopia has denied the request unless Egypt relinquishes its veto on water allocation.[68] After a meeting between the Ministers of Water of Egypt, Sudan and Ethiopia in March 2012, Sudan's President Bashir said that he supported the building of the dam.[69]

A Nile treaty signed by the upper riparian states in 2010, the Cooperative Framework Agreement, has not been signed by either Egypt or Sudan, as they claim it violates the 1959 treaty,[70] in which Sudan and Egypt give themselves exclusive rights to all of the Nile's waters.[71] The Nile Basin Initiative provides a framework for dialogue among all Nile riparian countries.[64]

Egypt, Ethiopia and Sudan established an International Panel of Experts to review and assess the study reports of the dam. The panel consists of 10 members; 6 from the three countries and 4 international in the fields of water resources and hydrologic modelling, dam engineering, socioeconomic, and environmental.[63] The panel held its fourth meeting in Addis Ababa in November 2012. It reviewed documents about the environmental impact of the dam and visited the dam site.[72] The panel submitted its preliminary report to the respective governments at the end of May 2013. Although the full report has not been made public, and will not be until it is reviewed by the governments, Egypt and Ethiopia both released details. The Ethiopian government stated that, according to the report, "the design of the dam is based on international standards and principles" without naming those standards and principles. It also said that the dam "offers high benefit for all the three countries and would not cause significant harm on both the lower riparian countries".[73] According to Egyptian government, however, the report "recommended changing and amending the dimensions and the size of the dam".[74]

On 3 June 2013, while discussing the International Panel of Experts report with President Mohammad Morsi, Egyptian political leaders suggested methods to destroy the dam, including support for anti-government rebels.[75][76] Unbeknownst to those at the meeting, the discussion was televised live.[24] Ethiopia requested that the Egyptian Ambassador explain the meeting.[77] Morsi's top aide apologized for the "unintended embarrassment" and his cabinet released a statement promoting "good neighbourliness, mutual respect and the pursuit of joint interests without either party harming the other." An aide to the Ethiopian Prime Minister stated that Egypt is "...entitled to daydreaming" and cited Egypt's past of trying to destabilize Ethiopia.[78] Morsi reportedly believes that it is better to engage Ethiopia rather than attempt to force them.[24] However, on 10 June 2013, he said that "all options are open" because "Egypt's water security cannot be violated at all," clarifying that he was "not calling for war," but that he would not allow Egypt's water supply to be endangered.[79]

In January 2014, Egypt left negotiations over the dam, citing Ethiopian intransigence.[27] Ethiopia countered that Egypt had set an immediate halt on construction and an increase of its share to 90% as the preconditions, which were deemed wholly unreasonable. Egypt has since launched a diplomatic offensive to undermine support for the dam, sending its Foreign Minister, Nabil Fahmi to Tanzania and the Democratic Republic of the Congo to garner support. Egyptian media outlets declared the visits productive and that the leaders of those nations had expressed "understanding" and "support" of Egypt's position.[80] Sudanese Foreign Minister Ali Karti criticised Egypt for "inflaming the situation" through its statements on the dam, and that it was considering the interests of both sides Al-Masry Al-Youm declared that Sudan had "proclaimed its neutrality".[26][81] The campaign is intensive and wide-reaching; in March 2014, for the first time, only Uganda, Kenya, Sudan, and Tanzania were invited by Egypt to participate in the Nile Hockey Tournament.[82] Foreign Minister Fahmi and Water Resources Minister Muhammad Abdul Muttalib planned visits to Italy and Norway to express their concerns and try to compel them to pull their support for the GERD.[64]

U.S. Secretary of State Mike Pompeo meets with Ethiopian Foreign Minister Gedu Andargachew in Addis Ababa in February 2020

In April 2014, Ethiopia's Prime Minister invited Egypt and Sudan to another round of talks over the dam and Nabil Fahmi stated in May 2014 that Egypt was still open to negotiations.[83] Following an August 2014 Tripartite Ministerial-level meeting, the three nations agreed to set up a Tripartite National Committee (TNC) meeting over the dam. The first TNC meeting occurred from 20 to 22 September 2014 in Ethiopia.[84]

In October 2019, Ethiopian Prime Minister Abiy Ahmed warned that "no force can stop Ethiopia from building a dam. If there is need to go to war, we could get millions readied."[85]

Beginning in November 2019, U.S. Treasury Secretary Steven Mnuchin facilitated negotiations between the governments of Egypt, Ethiopia, and Sudan with respect to the filling and operation of the dam.[86] In February 2020, Mnuchin said in a statement: "We appreciate the readiness of the government of Egypt to sign the agreement and its initialing of the agreement to evidence its commitment," adding "consistent with the principles set out in the DOP, and in particular the principles of not causing significant harm to downstream countries, final testing and filling should not take place without an agreement."[87][88] Ethiopian Foreign Minister Gedu Andargachew said Mnuchin’s advise to Ethiopia was" ill-advised".[89]

In February 2020, U.S.A Treasury issued statement about GERD stating" testing and filling should not take place without an agreement." after Ethiopia Skips US Talks With Egypt Over Dam Dispute. Ethiopians online express anger using #itismydam over what they claim was US and world bank's siding with Egypt contrary to co-observer role initially promised. The online campaign ironically coincidences with Ethiopia's annual public holiday, victory of Adwa, a decisive victory that successfully thwarted colonial campaign for the first time. Ethiopia has stated that "it will not be pressured on Nile River".[citation needed]

In July 2020, Ethiopian Foreign Minister Gedu Andargachew tweeted: "the river became a lake... the Nile is ours."[1] In the same month, talks between water ministers from three involved countries resumed under African Union supervision.[90]

In September 2020, the United States suspended part of its economic assistance to Ethiopia due to the lack of sufficient progress in negotiations with Sudan and Egypt over the construction of the dam.[91] On 24 October 2020, U.S. President Donald Trump stated on a public phone call to Sudan's Prime Minister Abdalla Hamdok and Israel's Prime Minister Benjamin Netanyahu that "it's a very dangerous situation because Egypt is not going to be able to live that way... And I said it and I say it loud and clear - they'll blow up that dam. And they have to do something." Ethiopian Prime Minister Abiy Ahmed responded that "Ethiopia will not cave in to aggression of any kind" and that threats were "misguided, unproductive and clear violations of international law."[92]

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