PONGOLAPOORT DAM: KwaZulu Natal

W Cape | E Cape | N Cape | Gauteng | KZN | Mpumalanga | Free State | Northwest | Limpopo

Catchment:

Water coarse (River):

Pongola River.

Capacity:

2 500 m3

Type of wall:

Date constructed:

Owner:

Map
Notes:

Until work started on the Gariep Dam in 1966, Pongolapoort was the largest dam under construction in South Africa. It is a medium thin, double curvature arch dam with a gradual transition towards a gravity thrust block on the left flank. It has a maximum height of 89 m and a crest length of 515 m. The dam has a controlled and an uncontrolled spillway. The gross capacity of the reservoir is 2 500 million m3, which is more than twice the mean annual runoff. The chute spillways have a combined capacity of 2 010 m3 at high flood level. The thickness of the wall above the cushion is 18,3 m tapering to 8,2 m at the spillway and then flowing to 11 m to carry a road across it. (Ref: The Water Wheel May/June 2009)

Water History : Pongolapoort Dam - The Water Wheel May/June 2009_Lani van Vuuren    www.wrc.og.za 
Photos:
0000176.jpg (44040 bytes) 0000331.jpg (48201 bytes) 0000391.jpg (74043 bytes) 0000867.jpg (51184 bytes) 0000868.jpg (66453 bytes)
0000869.jpg (47782 bytes) 0000870.jpg (38576 bytes) 0000915.jpg (46097 bytes) 0000982.jpg (69491 bytes) 0000983.jpg (39725 bytes)
0001086.jpg (48381 bytes) 0001093.jpg (41418 bytes) 0001094.jpg (43745 bytes) 0001095.jpg (74603 bytes) 0001512.jpg (44462 bytes)
Goo.jpg (78390 bytes) PPoort176.jpg (44335 bytes) PPoort331.jpg (50180 bytes) PPoort867.jpg (51833 bytes) PPoort868.jpg (67552 bytes)
PPoort869.jpg (51557 bytes) PPoort915.jpg (47576 bytes) 0006370.JPG (40893 bytes)
References:
Useful links:

Department of Water Affairs and Forestry (Dam information and levels)