They Planted a Stone is a 1953 British short black and white documentary film directed and written by Robin Carruthers and produced by James Carr for the Ministry of Information/Central Office of Information.
The film portrays how dams, barrages and irrigation canals were constructed on the Nile in Sudan, to generate hydroelectricity, irrigate the desert and create such projects as the Gezira Scheme.
The film was nominated for the 1954 Academy Award for Best Documentary Short.