Polihali Dam

The Polihali Dam is a concrete faced rock-fill dam under construction in Lesotho. It is the third dam, under the Phase II of the series of dams of the proposed Lesotho Highlands Water Project (LHWP), which will eventually include five large dams in remote rural areas of Lesotho and South Africa. The Polihali Transfer Tunnel, which will link this dam to the Katse Dam (the focal point of the LHWP), spans a length of 38 kilometers with a nominal bore of five metres. This tunnel will convey water via gravity from the Polihali reservoir to the Katse reservoir. From Katse, water is then conveyed to Phase I's Muela Hydropower Station and subsequently directed to the As River en route to Gauteng, South Africa.

Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).