LATEST ACTUAL STAGE:
S2B: Feasibility (2020)PROJECT LOCATION
Namibia South AfricaPROJECT INSTITUTION:
BENEFICARY COUNTRIES
Namibia South AfricaPROJECT DIMENSIONS:
STARTING_DATE:
COMPLETION_DATE:
PREPARATION COST:
55.11 million USDCAPEX COST:
501.00 million USDPROJECT STAGE:
S2B: Feasibility
PROJECT FEATURED IN:
Orange River System (ORS) is one of the most highly developed River Systems in Southern Africa. In September 2015, Namibia and South Africa, under the auspices of the PWC, commissioned the Noordoewer / Vioolsdrift Dam (NVD) Feasibility Study, which aimed at identifying and optimising the best development dam size(s), site(s) and sequence of dam developments in the ORS needed to achieve the overall catchment objectives, to re-regulate the flows for ecological needs and to increase the yield in the Orange River System for use by both RSA and Namibia. The study was completed in May 2020.
Orange River System (ORS) is one of the most highly developed River Systems in Southern Africa. In September 2015, Namibia and South Africa, under the auspices of the PWC, commissioned the Noordoewer / Vioolsdrift Dam (NVD) Feasibility Study, which aimed at identifying and optimising the best development dam size(s), site(s) and sequence of dam developments in the ORS needed to achieve the overall catchment objectives, to re-regulate the flows for ecological needs and to increase the yield in the Orange River System for use by both RSA and Namibia. The study was completed in May 2020.
The study investigated many possible options and in 2016 initially concluded that the optimal NVD would have a wall height of about 73 m, with a storage capacity of 2,800 million m3 and would be of concrete faced rock fill type (CFRD).
Certain limited further feasibility studies are required before the project can proceed to implementation. Such studies would include at least an independent review of the above findings, the finalisation of the exact parameters for the recommended optimal NVD in terms of size, site and type, and obtaining environmental authorisation for implementation.
The development of the NVD project will involve the following further stages:
The initially proposed NVD was sized as a concrete face rockfill dam (CFRD), with parameters as set out below, consisting of a side spillway, outlet works, hydroelectric plant, river flow gauging weir, etc. Parameter Description: Full Supply Level (FSL)-230 masl; Freeboard-12.5 m; Non-Overspill Crest (NOC)-242.5 masl; Lowest River Bed Level-162 masl; Dam Height up to NOC Level-80.5 m; Crest Length-1 km; Crest Width-10 m; and Embankment Slopes- 1V:1.4H. However, the exact dam parameters will be confirmed on completion of the further studies referred to above.
The project serves a planned infrastructure asset of another sector, but there is less than 50% overlap in the geography serviced by the proposed project and the other sector planned asset.
This planned project is part of the entire Orange River System (ORS) and is supported from the existing regulation infrastructure/dams upstream in Lesotho and South Africa.
| PREPARATION | CAPEX | |
|---|---|---|
| COST: | 55.11 | 501.00 |
| COST SECURED: | 0.00 | 0.00 |
| FINANCING TYPE: | ||
| FINANCIERS: |
Southern African Development Community
Ms. Maria Amakali-Maria.Amakali@mawf.gov.na
Mr. Livhuwani Mabuda-mabudal@dws.gov.za