The Iron Gate I Hydroelectric Power Station (Romanian: Porțile de Fier I, Serbian: Ђердап I/Đerdap I) is the largest dam on the Danube river and one of the largest hydro power plants in Europe.

[2] The project started in 1964 as a joint-venture between the governments of Romania and Yugoslavia for the construction of a major dam on the Danube River which would serve both countries.

As the original turbines' 30 years lifespan came to an end, in 1998 the Romanian half of the dam started a program of modernization.

By 2007 the program was completed and the Romanian half of the dam's operations were back to full capacity.

On the Serbian part of the dam, modernization started in July 2008;[4] till March 2016 were modernised units 4 to 6.