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Ash in Dam Construction



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De-Hoop Dam

The De Hoop dam is located in the Limpopo province, on the Steelpoort river and is a part of the Olifants River Water Resource Development Project (ORWRDP). In November 2011, the Department of Water and Sanitation (DWS) attempted to beat the 2010 record pour of 103 000m3 which required a total of 20 000 tons of Pulverised Fly Ash (PFA) in a 30 day period. The use of the Eskom produced high grade classified ash was instrumental in the dam’s success.

Katse Dam

The mighty Katse Dam was the focal point of the first phase of the Lesotho Highlands Water Project (LHWP). Requiring over 2, 4 million cubic meters of fly as concrete for construction, the 185 meter high, and double curvature arch dam was the highest dam in Africa for over a decade. The main objectives of the LHWP were to supplement the water supply to South Africa and to provide Lesotho with hydroelectricity. When construction started in 1991, the LHWP was the largest and most complex construction project of its type in the world. Ash Resources supplied over 250 000 tons of classified fly ash from its plant based at Lethabo Power Station.

Metalong Dam

The Metalong dam is located in Lesotho and is a part of the Lesotho Highlands Water Scheme projects. The contractor required a high quality classified ash which led to a total of around 40 000 tons of Eskom produced ash being supplied to this project through Ash Resources. The dam now has a wall which is 83 meters high with a design crest length of 280 meters long.