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grootdraai dam wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 background 2 see also 3 references toggle the table of contents grootdraai dam 3 languages afrikaans فارسی setswana edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide coordinates 26 55 9 s 29 17 53 e 26 91917 s 29 29806 e 26 91917 29 29806 from wikipedia the free encyclopedia dam in mpumalanga grootdraai dam interactive map of grootdraai dam official name grootdraai dam country south africa location mpumalanga coordinates 26 55 9 s 29 17 53 e 26 91917 s 29 29806 e 26 91917 29 29806 purpose industrial water opening date 1981 owner department of water affairs dam and spillways type of dam combination gravity and earth fill dam impounds vaal river height 42 m length 2180 m reservoir creates grootdraai dam reservoir total capacity 350 000 000 m³ catchment area 7995 km 2 surface area 5500 ha grootdraai dam is a combined gravity and earth fill type dam located on the vaal river near standerton mpumalanga south africa 1 it was established in 1981 background edit grootdraai dam is a composite structure comprising a central concrete gravity section 360 m long and two earthfill flanks giving a total crest length of 2180 m and a maximum wall height of 42 m above lowest foundation level the dam was completed in 1982 and was built primarily to support the water needs of the sasol ii and iii coal to petrol plants at secunda eskom s tutuka power station as well as the matla power station duvha power station kendal power station and kriel power station located on the coal fields in the adjacent olifants river basin 2 the dam also provides some flood attenuation for standerton and stores up to 100 million m 3 annum pumped into the upper reaches of the vaal river basin from heyshope dam in the usutu river basin the hazard potential of the entire dam construction has been ranked high 3 during the serious drought of 1983 the water resources in the adjacent komati river and usutu river basins were badly depleted leading to serious concerns that the water supplies to various power stations could be affected any water shortages to the power stations would be disastrous for south africa since 80 of the country s electricity is dependent on water from the komati usutu vaal system it was estimated that the newly completed 1982 grootdraai dam would empty within a matter of months and an emergency scheme was therefore initiated to pump water upstream over a distance of 202 km to grootdraai dam from vaal dam the emergency scheme involved constructing 7 weirs each with numerous pumps capable of pumping a total of 1 million m 3 day although the emergency scheme was never used it was completed and received an award for the most outstanding civil engineering achievement of 1983 from the south african institute of civil engineers 2 see also edit list of reservoirs and dams in south africa list of rivers of south africa references edit grootdraai dam surftribe it retrieved 2026 06 11 1 2 grootdraai dam in standerton mpumalanga www sa venues com retrieved 2026 06 11 list of south african dams from the department of water affairs retrieved from https en wikipedia org w index php title grootdraai_dam oldid 1358839069 categories dams in mpumalanga dams completed in 1981 hidden categories use south african english from july 2024 all wikipedia articles written in south african english pages using gadget wikiminiatlas articles with short description short description matches wikidata pages using infobox mapframe without shape links in wikidata coordinates on wikidata pages using the kartographer extension this page was last edited on 11 june 2026 at 08 34 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents grootdraai dam 3 languages add topic