1975 – Eletronorte begins the studies of Hydroelectric Inventory of the Xingu River Basin. The first mapping of the river and the bus localization project were carried out.
1980 – Once the inventory is completed, studies are under way to build the Altamira Hydroelectric Complex, with the Babaquara (6,600 MW) and Kararaô (11,000 MW) plants - the latter gave rise to the Belo Monte Hydroelectric Plant. According to the study of that period, the mills would require the displacement of 7,000 Indians, from 12 indigenous lands.
1989 – Completion of the first feasibility studies of Belo Monte HPP. Divergences about the socio-environmental impact led to the suspension of the financing of the work.
1994 – Review of Feasibility Studies, with reduction of flooded area and guarantee of non-flood of indigenous lands.
2002 – Presentation of new surveys to ANEEL. The Environmental Impact Study (EIA) is halted at the request of the Public Prosecutor.
July 2005 – National Congress authorizes Eletrobrás to complete the EIA.
August 2005 – Eletrobrás and construction companies Andrade Gutierrez, Camargo Corrêa and Norberto Odebrecht sign a Technical Cooperation
Agreement for the conclusion of the Technical, Economic and Socio-Environmental Feasibility Studies of Belo Monte Hydroelectric Power Plant.
January 2006 – Eletrobrás requests the Brazilian Institute for the Environment and Renewable Natural Resources (IBAMA) to open the previous environmental licensing process. The EIA begins to be drawn up.
March 2006 – IBAMA conducts the first technical survey in the project area.
August 2007 – IBAMA conducts technical surveys and public meetings in the municipalities of Altamira and Vitória do Xingu to discuss the Term of Reference for the EIA.
December 2007 – IBAMA issues the Term of Reference for the EIA.
July 2008 – National Council of Energy Policy defines that the only hydroelectric potential to be explored on the Xingu River will be that of the Belo Monte HPP. ANEEL approves the inventory update only with this Power Plant in the Xingu river basin.
March 2009 – Eletrobrás requests the Previous License.
April 2009 – IBAMA conducts new technical survey in the project area.
May 2009 – EIA and Environmental Impact Report (RIMA) are delivered to IBAMA.
February 2010 – IBAMA grants the Previous License of the work. On the other hand, it makes 40 fitness requirements.
April 2010 – Federal Government conducts the concession auction for the construction and operation of Belo Monte HPP for 35 years.
June 2011 – IBAMA issues the Installation License n. 795/2011, which allows the beginning of the works of Belo Monte HPP. On this same date, works started.
November 2015 – IBAMA grants the Operation License n. 1317/2015 of Belo Monte HPP.
December 2015 – Opening and closing test of the two Spillway gates that release water in a controlled way to the Channel that interconnects the Main and Intermediate reservoirs of the Plant.
January 2016 – Filling of the Escape Channel of the Belo Monte Hydroelectric Plant is completed.
February 2016 – Completion of reservoir filling. First test of mechanical rotation of the Generating Unit 01 of the Main Powerhouse.
April 2016 – Beginning of the commercial operation of the Enterprise with the release of the Generating Units 01 of the Houses of Main and Complementary Strength by ANEEL.
May 2016 – Inauguration of the Belo Monte HPP, on the 5th.
June 2016 – Beginning of the commercial operation of the second generating unit of the Complementary Powerhouse of the project, in the Pimental Site.
July 2016 – The second generating unit of the Main Powerhouse in the Belo Monte Site is integrated with the National Interconnected System (SIN) and the commercial generation in this machine is authorized by ANEEL.
August 2016 – Authorization of ANEEL for commercial operation of the third Generating Unit in the Complementary Powerhouse, in the Pimental Site, totaling five turbines in operation.
November 2016 – Beginning of the commercial operation of the Generating Unit 03 of the Main Powerhouse and of the Generating Unit 04 of the Complementary Powerhouse
January 2017 – Beginning of the commercial operation of the Generating Unit 04 of the Main Powerhouse and of the Generating Units 05 and 06 of the Complementary Powerhouse. In this way, the Complementary Force House is 100% in operation.
April 2017 – Start of the Commercial Operation of the Generating Unit 05 of the Main Power House, releasing a further 611.1 MW to the SIN.
July 2017 – Start of the Commercial Operation of the Generating Unit 06 of the Main House of Forces.
October 2017 – Beginning of Commercial Operation of Generating Unit 07 of the Main Power House, totaling in 2017 the installed potential for Commercial Operation of 4,510.57 MW.