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Orange-Fish Tunnel
Colesberg, Northern Cape

WILLIAM HALCROW and PARTNERS: Engineer
KEEVE STEYN and PARTNERS: Engineer

Date:1965-1975
Type:Tunnel
Status:Extant

 


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Coordinates:
30°41'31.08" S 25°45'52.88" E Alt: 1276m

This 82.5km tunnel carries water from Oviston at the Gariep Dam to the Fish River valley with the outlet at Teebus about 23km south west of Steynsburg (See Map). It is the fifth longest tunnel in the world (Wikipedia) with a diameter of 5.35m and a fall of 77m. It is part of the Orange River Project which was the brainchild of Dr AD Lewis who, as Secretary of Water Affairs, launched the idea in 1928.

See also Structurae

All truncated references not fully cited below are those of Joanna Walker's original text and cited in full in the 'Bibliography' entry of the Lexicon.


Writings about this entry

Olivier, Henry. c1976. Great Dams in Southern Africa. Cape Town, Johannesburg, London, New York: Purnell & Sons. pg 163-168