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Table 1: Driekoppies dam main features

Source: Swaziland Komati Project Enterprise

Dam type Combined earthfill with uncontrolled spillway
Maximum wall height 50m
Embankment length 2400m
Gross storage capacity 251Mm3
Full supply level 328.5m above sea level
Surface area at full supply level 1870ha
Catchment area 900km2
Volume of concrete 201,300m3
Volume of embankment 4.7Mm3
Annual incremental system yield 140Mm3 at 80% assurance
Natural mean annual run off 272Mm3
Present mean annual run off 216Mm3
Estimated total cost US$73.6M
Construction period 57 months