Gabčíkovo–Nagymaros Dams

The Gabčíkovo–Nagymaros Dams is a large barrage project on the Danube. It was initiated by the Budapest Treaty of 16 September 1977 between the Czechoslovak Socialist Republic and the Hungarian People's Republic. The project aimed at preventing catastrophic floods, improving river navigability and producing clean electricity.

Only a part of the project has been finished in Slovakia, under the name Gabčíkovo Dam, because Hungary first suspended, then tried to terminate, the project due to environmental and economic concerns. Slovakia proceeded with an alternative solution, called "Variant C", which involved diverting the Danube, the border river. These caused a still unresolved international dispute between Slovakia and Hungary. Both parties turned to the International Court of Justice for a ruling.