Roode Els Berg Dam

Roode Els Berg Dam
Roode Els Berg Dam
Location	Sanddriftkloof Hex Valley De Doorns South Africa

Roode Elsberg Dam is located on the Sanddrift River, some 10 km north west of the town of De

Doorns in the Western Cape. The catchment is medium-sized (139 km2) and the dam functions

primarily as storage for domestic and irrigation use. The dam completed in 1969, was designed,

built and is owned by the Department of Water Affairs and operated by the Hex Valley Water

Users Association.[1]

The dam wall is a double curvature arch dam with an uncontrolled ogee spillway in the river

section. An apron is provided at the toe of the spillway. A gallery system of two interconnected

galleries in the dam body itself as well as five galleries into the foundation (two on the left and

three on the right flank) provide drainage and pressure relief to the dam.

The main outlet works of the dam consists of an inlet structure on the left bank upstream of the

dam wall. The inlet is controlled by a service gate. From the inlet a 1 890 mm diameter tunnel

leads to a control room 91.44 m downstream of the inlet. The control room is accessed by a

tunnel from the left bank downstream of the dam wall. In the control room the water flows

through a 1 219 mm steel pipe.

General

Owner: Department of Water Affairs

Designer: Department of Water Affairs

Type: Double curvature arch dam

Built by: Department of Water Affairs

Region: Western Cape

Nearest Town: De Doorns

Completion date: 1969

Purpose: Irrigation and domestic use

Size: Large

Classification: Category 3

Capacity 7.73 x 10'6 m3

Concrete arch

Spillway type: Uncontrolled ogee

Non-overspill crest level: RL 577.492 m

Full supply level: RL 572.92 m

Freeboard between NOC and FSL: 7.572 m

Height above riverbed: 65.53 m

Effective crest length of spillway: 74.371 m

Capacity of spillway: 1 659 m3/s

Roode Els Berg Dam is dam in South Africa.

References

List of South African Dams from the Department of Water Affairs and Forestry (South Africa)

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