The Coega Special Economic Zone (SEZ) is situated on the northern side of Port Elizabeth within the Nelson Mandela Bay Metropolitan Municipality (NMBM), Eastern Cape Province. Abutting the Coega SEZ on the eastern side is the Ngqura Deepwater Port, which is managed by the Transnet National Ports Authority (TNPA). The integrated SEZ and Port of Ngqura is approximately 11,500 ha in extent and comprises 14 zones designated for various light, medium and heavy industrial land uses. The purpose of the marine intake and outfall infrastructure and servitudes project is to enable the provisioning of seawater to various industries within the Coega SEZ (aquaculture, power provision and seawater desalination plant) via a number of seawater intakes; and the discharge of treated effluent into the marine environment. As such, infrastructure related to this project needs to be constructed along the coast adjacent to the Coega SEZ. The Port of Ngqura and Zone 10 within the SEZ have been proposed as the locations for the establishment of the marine servitudes.
1. Intake Infrastructure
The need for the marine seawater abstraction servitudes is driven by the water requirements for the following proposed Coega SEZ industries:
The following maximum (worse case) seawater intake requirements are projected:
There will be two seawater abstraction servitudes with associated infrastructure:
Within each servitude, a number of different seawater abstraction technologies will be utilised, depending on industry requirements.
Detailed descriptions of these technologies are provided in Chapter 2 of the EIR.
2. OUTFALL INFRASTRUCTURE
The need for the marine effluent discharge servitudes is mostly driven by a corresponding need by the respective Coega SEZ industries to return effluent seawater back into the offshore marine environment. Other discharges will include wastewater treatment effluent and stormwater.
The following maximum effluent discharge requirements are projected:
Three discharge servitudes will be required:
ALL the following technologies will be implemented to discharge the various effluent streams from the various proposed land-based uses into the sea.
The time of construction of the various intake and discharge structures within the servitudes will be dictated by the demand and timing of the implementation of the various industries.
3. STORMWATER INFRASTRUCTURE
Stormwater derived from Zone 10 will be attenuated on land behind the foredune area, approximately 40-50 m from the HWM. The stormwater outlet channel will run parallel to the HWM but behind the foredune, and will comprise of gabions and reno mattresses to break the flow of water before it enters a gently sloping lined channel (0%-0.5% slope). This will attenuate the stormwater and allow for the infiltration of water into the underlying sandy substrate. The stormwater structures have been designed to attenuate the 1:5 year storm event. Three outlet channels will be constructed. A berm surrounding the outlet channel will prevent the overflow of stormwater into the surrounding beach environment. A large reno mattress and associated gabions on the far end of the outlet channel will extend to the rocky shoreline to ensure the system can accommodate major rainfall events (>1:5 year) which may result in the overflow of water from the stormwater outlet channel.
Published: 14 June 2021
Review Period: N/A
Contact Person: Ms Nicole Wienand
Tel: 046-622 2364
Final Environmental Impact Assessment Report-EIRFinal EIR Marine Intake and Outfall Servitude
APPENDICES-EIRAppendix 1-Curriculum Vitae Appendix 2-Proof of Public Participation Process Appendix 3-Issues and Response Trail Appendix 4-EAP Declaration Appendix 5-DEFF Requirements Appendix 6-Final Dispersion Modelling Report Appendix 7-Final Environmental Risk Assessment Appendix 8-Final Marine Cultural Heritage Report Appendix 9-Final Marine Ecological Assessment Appendix 10-Final Terrestrial Ecological Assessment Appendix 11-Final Geotechnical Assessment Appendix 12-Final Economic Assessment Appendix 13-Final Historical Assessment Appendix 14-Coega SEZ Wetland Assessment Appendix 15-Specialist Declarations Appendix 16-Map of Corner Point Coordinates Appendix 17-Undertaking of Oath Appendix 18-Coastal Waters Discharge Permit Application
Final Draft Construction Environmental Management Programme - EMPrFinal Draft Construction EMPr
APPENDICES-Construction EMPrAppendix 1-Curriculum Vitae Appendix 2-Method Statement Appendix 3-CDC Standard environmental specification for construction Appendix 4-Example of Environmental Training Material Appendix 5-CDC Procedure for Emergency Preparedness and Response Plan
Final Draft Operational Environmental Management Programme - EMPFinal Draft Operational EMP
APPENDICES-Operational EMPrAppendix 1-Curriculum Vitae Appendix 2-Example of Environmental Training Material Appendix 3-CDC Procedure for Emergency Preparedness (EP) and Response Plan (RP)
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