Osborne Dam
The 928th tallest dam in the world
The Osborne Dam site on the Odzi River, Zimbabwe, was identified in the 1950s by the planning engineers of the Ministry of Water. Cored drilling investigations on the two possible alignments were completed in the 1960s. After the completion of Mazvikadei dam [1985–'88] with Italian financial aid, further funding became available for the project and when the 10 000 hectares of potential irrigable land was identified downstream the project was approved in 1989 by the multi-ministry irrigation committee of the Zimbabwe Government.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).