ASSURING SUSTAINABLE PROVISION OF WATER SERVICES, FOR LIFE.
Bloem Water operations span the following Regions including Head Office: Modder River, Caledon River and Orange River Region with its Water Treatment Works capacity, Sources of water and area of service detailed below.
The Gariep Dam was originally named the Hendrik Verwoerd Dam after the first prime minister of the Republic of South Africa Hendrik Verwoerd on its commission in 1971. However, after the end of the apartheid, the Verwoerd name was considered unsuitable. The name was officially changed to Gariep dam on 4 October 1996. Gariep is Khoekhoe for "river", the original name of the Orange River .
The dam is on the Orange River about 48 kilometres (30 mi) north-east of Colesberg and 208 kilometres (129 mi) south of Bloemfontein. It is in a gorge at the entrance to the Ruigte Valley some 5 kilometres (3.1 mi) east of Norvalspont.
The wall is 88 m high and has a crest length of 914 m and contains approximately 1.73 million m³ of concrete. The Gariep Dam is the largest storage reservoir in South Africa. In South African English, 'dam' refers both to the structure and the water volume it retains. Gariep Dam has a total storage capacity of approximately 5,340,000 megalitres (5,340 hm3) and a surface area of more than 370 square kilometres (140 sq mi) when full. The hydro-electrical power station houses four 90 MW generators, giving a maximum output of 360 MW of electricity at a water flow rate of 800 m³/s.
The Welbedacht Dam is a concrete barrage dam in the Caledon River which was designed and constructed by the Department of Water Affairs and Forestry in 1973. The Dam has a catchment area of approximately 15 245 km2. It supplies water to the Greater Bloemfontein area via a 115 km long Caledon-Bloemfontein pipeline, and the surrounding small towns Dewetsdorp, Wepener, Reddersburg and Edenburg.
The Dam storage capacity has been greately reduced from the original capacity of ( 95%)114 million cubic meters in the past 40 years to just less than( 6 million cubic meters( 5 %) storage capacity left.Though the dam level reading could be interpreted as full supply level , it should be noted that its not a true reading as 95% of the storage is silted up and for operation reference we have only 5% to consider as the correct level .
The Dam was constructed in 1988 with a storage capacity of 137 million cubic meters situated on the Riet Spruit near Wepener. The Dam was constructed to serve as the storage capacity for Welbedacht Dam which has been silted up and had the storage capacity reduced from 115 million cubic meters to just under 6 million cubic meters capacity over the past 40 years. The dam serves has a relatively small catchments area of 798km2 and serves to augment the Welbedacht Dam and Rustfontein Dam during drought.
The Rustfontein Dam was constructed in 1955 within the Modder River Catchment area with approximately 940km2.The Dam receives water from the Novo Transfer Scheme and provides Treated water to Rustfontein Water Treatment Works and well as release water to Mangaung Metropolitan Municipality to augment the Mockes Dam. The current dam has a capacity of 70 million cubic meters
Thaba Nchu receives raw water primarily from the Kgabanyane River where water is stored in Groothoek Dam with a capacity of 11 million cubic meters and treated at the Groothoek water treatment works with a capacity of 18Ml/d.
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