Strategic Transmission Corridors (EGI)

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On the 16 February 2018 Minister Edna Molewa published Government Notice No. 113 in Government Gazette No. 41445 which identified 5 strategic transmission corridors important for the planning of electricity transmission and distribution infrastructure as well as procedure to be followed when applying for environmental authorisation for electricity transmission and distribution expansion when occurring in these corridors. 
In March 2019, a generic environmental management programme (EMPr) relevant to an application for environmental authorisation for substations and overhead transmission and distribution electricity transmission infrastructure was published in Government Notice No. 435 in Government Gazette No, 42323. The EMPr is relevant to substations or overhead transmission and distribution infrastructure when developed within or outside of the strategic transmission corridors. 
On 29 April 2021, Minister Barbara Dallas Creecy published Government Notice No. 383 in Government Gazette No. 44504, which expanded the eastern and western transmission corridors and gave notice of the applicability of the application procedures identified in Government Notice No. 113, to these expanded corridors.
The transmission corridors and their expansion were identified through the undertaking of 2 strategic environmental assessments as was the development of the generic EMPr for substations and overhead powerlines. The first strategic environmental assessment was finalised in 2016 and second in 2019. 

Downloadable data:

The following Shapefiles will soon be available for download from the Downloads Tab:

Transmission Corridors and Expansions Corridors Shapefiles containing spatial data for the Strategic Transmission Corridors assosiated with the REDZs.

Note: Registration / sign in is required to download the data.


Downloadable documents:

The relevant Government Gazettes, the final strategic environmental assessment reports and the “comments and responses document” which captures all of the comments received on the Ministers notification of the intention to gazette the expanded corridors and the Departments response, are available by clicking on the link under the heading “Document”.


Documents Description Format File Size

Government Gazette

GG 44504 notice no. 383 of 29 April 2021 

(Expanded Strategic Transmission Corridors and procedures)



Signed Map

GG 44504 notice no. 383 of 29 April 2021 

Appendix 1 Map - Strategic Transmission Corridors with Expansions



External CRR

External comments on REDZs and procedures in the REDZs, Gas Corridors and EMPr,

EGI Corridors and Standard



Government Gazette

GG  42323 Notice no. 435 of 22 March 2019.

Generic Environmental Management Programme Substations and Overhead Powerlines



Government Gazette

GG 41445 Notice no. 113 of 16 February 2018, pages 88-91.

Strategic Transmission Corridors and procedures.



EGI Expansion Corridors

Expanded Western and Eastern Corridors



Printable Map

Strategic Transmission Corridors with Expansions



SEA Report,  2016

Strategic Environmental Assessment for Electricity Grid Infrastructure in SA, 2016.



SEA Report, 2019

SEA for Expansion of Electricity Grid Infrustructure in SA, December 2019.




GG  42323 Notice no. 435 of 22 March 2019.

Generic Environmental Management Programme for Substations and Overhead Powerlines



Government Gazette

GG 43571 Notice no. 835 of 31 July 2020.

Consultation on the intention to adopt a Standard for development of Electricity and

Transmission Infrustructure within Identified Geographical Areas. 



Standard for EGI Development, 2020

Standard for Electricity Transmission and Distribution Power Line Development

within Identified Geographical Areas, 2020.