"We will have a ground-breaking ceremony in Xayaboury on Wednesday," said Viraphonh Viravong, deputy minister of Energy and Mines.
The hydroelectric project will be the first run-of-river dam to be built on the lower Mekong. Four dams have already been built on the upper Mekong in China.
The project has been criticised by environmentalists and Laos'South-east Asian neighbours for its possible impact on the flow of sediments downstream and fish migration.//DPA